Qualification: 
Ph.D, M.E
Email: 
k_deepa@blr.amrita.edu
Phone: 
9980005071

Dr. K. Deepa currently serves as Assistant Professor (Selection Grade) at the Department of Electrical & Electronics, Amrita School of Engineering, Bengaluru campus. She has more than 23 year of experience in teaching. She has 40+ international journal papers, 40+ international conference papers and 6 national conference papers to her credit. She has authored two books “Control Systems” and “Electrical Machines”. Her Ph.D. thesis title was “Design, Analysis and Control of DC to DC Quasi Resonant Converters”. She is a senior member of Institute of Electrical and Electronics Engineers (IEEE) & IEEE Power and Energy Society (PES) and life member of Institution of Electronics and Telecommunication Engineers (IETE) & Indian Society for Technical Education (ISTE). She is the advisor for the IEEE-PES& IAS student branch joint chapter and advisor for IEEE-WIE in Amrita School of Engineering, Bengaluru. She was IEEE PES Bangalore chapter Treasurer for 2019 EXECOM, IEEE PELS Bangalore chapter Vice chair for 2020 and Secretary for 2021 EXECOM. She is reviewer of IET Power Electronics Journal, IEEE Transactions on Industrial Electronics, IEEE Journal of Emerging and Selected Topics in Power Electronics , Journal of testing and evaluation, Advances in Electrical and Electronic engineering, International Journal of Power Electronics and Drive System, Journal of electrical engineering and technology, and many more IEEE conferences and journals.

Currently she is guiding her Ph. D., M. Tech. and B. Tech. students in the area of Electric Vehicles, V2G, V2V, G2V, V2H, Battery management systems, Smart Grid, Power Electronics Applications to Power Systems & Renewable energy Technologies, Soft Computing, Drives, Intelligent Control Techniques & Control System, Power Quality, FACTS Devices, Multi-level Inverter, Resonant Converters.

Education

  • 2016: Ph. D. (Electrical Engineering)
    Area: Power Electronics
    From: Jawaharlal Nehru Technological University Anantapur, Ananthapuramu - 515002, Andhra Pradesh, India.

  • 2005: M. Tech.
    Area: Power Electronics
    From: Jawaharlal Nehru Technological University Anantapur, Ananthapuramu - 515002, Andhra Pradesh, India.

  • 1998: B. E.
    Specialization: Electrical and Electronics Engineering Department
    From: Alagappa Chettiar College of Engineering and Technology/ Madurai Kamaraj University, T.N

Professional Appointments

Year

Affiliation

2009 - Till date

Assistant Professor, Amrita School of Engineering, Bangalore

2007 - 2009

Assistant Professor, T John Institute of Technology, Bangalore

2006 –2007

Senior lecturer, Shridi Sai Engineering College, Bangalore

2000 –2006

Lecturer/Senior lecturer, Sri Sai Ram Engineering College, Chennai

1999 –2000

Lecturer, Tagore Engineering College, Chennai

1998 –1999

Lecturer, G.K.M Engineering College, Chennai

Research & Management Experience

Have 10 + years of research experience in projects related to Resonant Power Converters, Electric vehicle charging techniques, On board and off board chargers, V2G, G2V,V2V, V2H, H2V…etc, Battery management systems, DC micro grid, Wireless power Transmission based converters, Image processing based agriculture model

Major Research Interests

  • Electric vehicle charging and balancing techniques
  • On board and off board chargers
  • V2G, G2V,V2V, V2H, H2V…etc
  • Battery management systems
  • DC micro grid
  • Wireless power Transmission based converters
  • Power Electronics application for Renewable Energy Technologies
  • Power Electronics application for Power Systems.
  • Power electronics and drives Applications.

 Membership in Professional Bodies

Name of the Society

Nature of Membership

The Institution of Electrical and Electronics Engineers (IEEE –USA)

 Senior Member

The Institution of Electronics and Telecommunication Engineers 

(IETE-India)

Associate Member

Indian Society For Technical Education ( ISTE - India)

Life Member

Publications

Publication Type: Conference Paper

Year of Publication Title

2021

S. Manikanta, Neha, R., Reddy, R. Chakradhar, K. Sireesha, and Dr. K. Deepa, “Comparative Study on Forecasting methods of EV Arrivals at Battery Swapping Station”, in 2021 5th International Conference on Trends in Electronics and Informatics (ICOEI), 2021.[Abstract]


Electric Vehicle(EV) is chosen over the conventional vehicles, due to its less contribution in release of green-house gases. The depleted batteries in an EV can be refuelled using Battery Charging(BC) and Battery Swapping(BS) techniques. As the BS method provides, less refuelling time and flexibility in service to EV user, Battery Swapping stations (BSS) are gaining lot of acceptance from the transportation sector. BSS must plan its battery stack -with full charge to serve EV user with less waiting time. Hence, the forecasting of EV arrivals is necessary for the optimal planning of BSS. This paper presents, performance analysis of various forecasting algorithms used for EV arrivals, by using MATLAB/SIMULINK environment and results are analysed with performance metrics such as mean square error, system simulation time, correlation etc. A comparative analysis on various time series models has been carried out and results are analysed.

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2020

B. Prasanth, Sanju, S. B., Y., S. Srinivas R., and Dr. K. Deepa, “Estimation of Regenerative Braking Force in Electric Vehicles for Maximum Energy Recovery”, in 2020 IEEE 17th India Council International Conference (INDICON), 2020.[Abstract]


The drive range of the Electric vehicle is limited and is dependent on the energy stored in the battery/supercapacitor. In order to enhance, the force during regeneration has to be maximized within the braking time available and has been achieved by estimating the force using fuzzy based logic and artificial neural networks to put forth the estimator with maximum energy recovery. To ensure the safety of the vehicle, all the four wheels has to be locked simultaneously which is achieved by the braking force distribution curve. An algorithm has been implemented in MATLAB/Simulink to distribute the front braking force between the regenerative and frictional brakes. With the artificial neural network, there has been an 8.33% increase in the power extracted compared to that of the fuzzy logic controller and driving range has been increased by 25.7% compared to the non-regenerative braking condition.

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2020

A. K. Saxena and Dr. K. Deepa, “DC Micro-Grid-Based Electric Vehicle Charging Infrastructure - Part 1”, in Advances in Electrical and Computer Technologies, Singapore, 2020.[Abstract]


With the advent of electric vehicles, the charging infrastructure provides the backup for the EV penetration in the current automotive world. Currently, the EV charging is dependent on taking power from the conventional grid and transforming it to be suitable to charge the EV batteries. Using conventional grid beats the purpose of using electric vehicles. Also, the impact of charging large number of EV's from the grid is a topic which is still being studied. EV charging in mass is bound to affect the grid parameters such as voltage profile, power fluctuations, harmonic content and can cause unbalance in the AC system, which can severely affect the operation of the AC system. This paper deals with an approach to try and understand these impacts of EV charging on the conventional grid and AC system.

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2020

A. K. Saxena and Dr. K. Deepa, “DC Micro-Grid-Based Electric Vehicle Charging Infrastructure–-Part 2”, in Advances in Electrical and Computer Technologies, Singapore, 2020.[Abstract]


With the advent of electric vehicles, the charging infrastructure provides the backup for the EV penetration in the current automotive world. Fast charging is one such concept of providing a means to charge EV's within a matter of minutes. The development in the concept of DC micro-grids has enhanced the charging operation of electric vehicles and has reduced the charging time. This paper proposes a charging infrastructure that deals with isolating the power requirement from the grid and supplies the power for EV charging through a DC micro-grid via a set of converters to transform the power from one level to another. As an emergency case, the grid is also kept into picture to supply power only in case of emergencies, and the operation is explained in part 1 of this paper. Use of this DC micro-grid for charging infrastructure ensures optimal usage of available power and charging time.

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2019

S. Sreelakshmi, M. S., K., and Dr. K. Deepa, “Bidirectional Converter Using Fuzzy for Battery Charging of Electric Vehicle”, in 2019 IEEE Transportation Electrification Conference (ITEC-India), Bengaluru, India, India, 2019.[Abstract]


Electric vehicles have been increasingly occupying space over traditional IC engine-based vehicles for addressing the aspects of GHG emission, fossil fuel depletion and climate change. In electric transportation, the charging and recharging of batteries are significant in the sense, they affect the dynamic performance of the vehicle. This paper discusses the characteristics and modes of working of a bidirectional converter with soft switching that can be used in electric vehicle battery charging. Closed loop is simulated with fuzzy logic and PI controllers and the comparative analysis clearly highlights the fact that fuzzy base controllers are more efficient than PI controllers. The circuit under discussion is a bidirectional converter which can be utilized for both EV battery charging and discharging.

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2019

R. George, Vaidyanathan, S., and Dr. K. Deepa, “Ev Charging Station Locator With Slot Booking System”, in 2019 2nd International Conference on Power and Embedded Drive Control (ICPEDC), Chennai, India, India, 2019.[Abstract]


As the world is facing an insufficiency in fossil fuels, every nation is moving towards sustainable, admissible, reliable and efficient green resources of energy. The technology supporting Electric Vehicles (EVs) is rapidly developing towards improvement as the cost of EV components are reducing. Electric Vehicles (EV) are gaining more popularity as the conventional vehicles are affecting the environment drastically. In the proposed work, the State of Charge (SoC) of the EVs battery is displayed constantly and the nearest charging stations are displayed on the screen. From a list of suggested charging stations nearest to the EV driver, the screen in the vehicle will direct the driver to the slot booking website through which all the available slots are displayed. As EVs become more commercial, there will be a need to create an efficient slot booking system as the charging process can be time consuming and the need for more stations will be demanding. The proposed model of the booking system is designed to create a cost effective and efficient system.

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2019

S. Sasikumar and Dr. K. Deepa, “Comparative Study of LCL-S and LCC-S Topology of Wireless EV charging System*”, in 2019 Innovations in Power and Advanced Computing Technologies (i-PACT), Vellore, India, India, 2019.[Abstract]


In recent time usage of electric vehicle by the consumer is increasing day by day. Inductive power transfer is the transfer of power between the input and output without any wired connection. With the wireless coupling coil the power can be transferred from primary to secondary for the charging of battery of an EV. In this work, comparative study of LCL-S and LCC-S topology is carried out. The T type topology is introduced to find out output and input impedance. Matlab simulations are carried out and the power transfer capability and efficiency calculations are compared and analyzed in both topologies. From the comparative study it is concluded that the LCL-S topology is best suited for higher efficiency and high output power as proved.

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2018

Nidhis, A.D., P., .N.V., C., Reddy, K. C., and Dr. K. Deepa, “Cluster based paddy leaf disease detection, classification and diagnosis in crop health monitoring unit”, in Lecture Notes in Computational Vision and Biomechanics, 2018.

2018

S. K. Vempalli, Dr. K. Deepa, and .G, P., “A Novel V2V Charging Method Addressing the Last Mile Connectivity”, in 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Chennai, India, India, 2018.[Abstract]


One of the main drawbacks in adopting EV vehicles is the last mile connectivity issue. There is always a chance that the user/rider may get stranded without EV charge and no EV charging stations nearby. With the aim of solving such an exigency, this paper proposes a novel V2V charging technique which allows charge transfer between two EVs off the grid, and discusses its modes of operation. Non-isolated bidirectional DC-DC converters with average current control technique are simulated in a MATLAB/Simulink environment to verify and validate the efficiency and charging time for the proposed charging technique.

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2018

S. Sasikumar and Dr. K. Deepa, “An Efficient Resonant Transmitter with Single Stage Boost Receiver Topology for Wireless Power Transfer in Electric Vehicle”, in 2018 4th International Conference for Convergence in Technology (I2CT), Mangalore, India, India, 2018.[Abstract]


In this new advanced technology, inductive power transfer can supply power from ac/dc source to batteries without the use of wired connections. The half wave or full wave rectifier with boost circuit at the receiver side leads to the insufficient power transfer at the load side. So single stage boost rectifier circuit is used as an alternative, which is efficient and compact. This paper presents the comparison of three topology with single stage boost rectifier circuit. Matlab simulations of output voltage and current are analysed and the topology best suited for dynamic power transfer in EV charging system is discussed with necessary results.

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2017

Dr. K. Deepa, Kumar, P. A., Krishna, V. S., Rao, P. N. K., Mounika, A., and Medhini, D., “A Study of Comparative Analysis of Different PWM Techniques”, in 2017 International Conference On Smart Technologies For Smart Nation (SmartTechCon), 2017.[Abstract]


Multilevel inverter has benefits like low stress on switches, low harmonic distortion and can be used in high voltage and high power applications. In this paper 7 - level Multilevel inverter which has less number of switches is considered with various PWM Techniques. The different PWM techniques considered are Carrier-Overlap PWM(CO-PWM), Variable Frequency PWM(VF-PWM), Phase Shifted PWM(PS-PWM), Alternate Phase Opposition Disposition PWM(APOD-PWM), Phase Disposition PWM(PD-PWM), Phase Opposition Disposition PWM(POD-PWM). The given topology is modeled and simulated with the help of MATLAB/SIMULINK to check which PWM technique leads low THD value.

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2017

Dr. K. Deepa, Baig, M. F., Mohith, P., and Abhinav, A. V., “Dynamic Analysis of LUO Converter with all Parasitics”, in 2017 International Conference on Trends in Electronics and Informatics (ICEI), 2017.[Abstract]


This paper presents the ripple free voltage from the design of developed DC-DC converter model. DC voltage provided by battery is not a constant voltage and contains high voltage ripples, thus it is not suitable for most the applications like electric vehicle. Closed loop DC-DC converters are employed to eliminate the ripples regardless of change in the voltage across the load. In the existing method, the classical converter for electric vehicle applications do not meet the load requirements. To eradicate this problem the advanced DC-DC Luo-converter technology was introduced. In this paper the state space averaging technique is applied for Luo converter. The simulation in MATLAB/Simulink was carried out and the result obtained for the circuit and state space model are presented.

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2017

N. M. Ibrahim, Gangadhar, J. V., Partho, M., and Dr. K. Deepa, “High frequency SEPIC-WEIBERG converter for space applications”, in Proceedings of the International Conference on Inventive Computation Technologies, ICICT 2016, 2017, vol. 2.[Abstract]


SEPIC-WEINBERG converter is introduced in this paper. This converter is ideal for photovoltaic applications. The suggested converter has efficiency higher than that of regular SEPIC and Weinberg converter. But the SEPIC-WEINBERG converter has similar levels of switch voltage stress as that of the SEPIC. The switching losses are low in the suggested converter. It is of small size and has low current harmonic content in it. The analysis of the SEPIC-WEINBERG converter is done and discussed in depth. © 2016 IEEE.

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2015

V. Anuvinda and Dr. K. Deepa, “Fuzzy based flexible converter for satellite electronics”, in Circuit, Power and Computing Technologies (ICCPCT), 2015 International Conference on, Nagercoil, 2015.[Abstract]


Single module DC-DC converter apt for two applications of same power and different output voltages is proposed with its relevant simulation results to substantiate the converter working. The suggested multi output flexible converter provides a provision to select one among the four available output combinations. The selection of required output combination is done merely with the help of output connectors, without changing any circuit parameters. A simulation model of the converter with one of the four combinations is done in MATLAB Simulink. Turn on at zero voltage for active devices, and turn off at zero current for passive devices are accomplished because of the associated LLC resonance principle. A fuzzy controller is also introduced for zero voltage regulation of the converter for change in load current. More »»

2015

S. Sreelakshmi and Dr. K. Deepa, “Fuzzy based bidirectional converter”, in Circuit, Power and Computing Technologies (ICCPCT), 2015 International Conference on, Nagercoil, 2015.[Abstract]


The core topic of the paper discuses bidirectional buck/boost converter implemented using soft switching. In addition to a soft switched DC-DC conversion, the
circuit also facilitates an additional output which makes the system capable of supporting multiple applications. The circuit under discussion uses fuzzy logic for the closed loop
operation which has better overall performance compared to other conventional converters The circuit has been simulated in Mat lab Simulink software and analysis of both the

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2015

P. Nair and Dr. K. Deepa, “Two-port DC-DC converter with flyback inverter for rural lighting applications”, in Advancements in Power and Energy (TAP Energy), 2015 International Conference on, Kollam, 2015, pp. 249-253.[Abstract]


A two port DC-DC converter, combined with a modified flyback inverter, is presented in this paper. The output of the inverter is 230V sinusoidal voltage at 50Hz used for supplying rural lighting applications. Combination (solar and battery) of the energy sources along with a voltage doubler forms the two input port of the DC-DC converter for solar-battery hybrid systems. To obtain a low frequency output voltage for the load modified flyback inverter structure is utilized. A control algorithm implemented to supply the load using PV and battery sources either independently or simultaneously for maintaining the constant output voltage is also presented. This work focuses on simulation studies of the same to verify the converter working using PSIM software.

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2014

Dr. K. Deepa, Jeyanthi R., Mohan, S., and M. Kumar, V., “Fuzzy Based Flyback Converter”, in 2014 International Conference on Advances in Electrical Engineering (ICAEE), 2014.[Abstract]


DC-DC converters can be viewed as dc transformers that deliver a DC-DC voltage or current at a different level than the input source. The unregulated DC voltage is converted into regulated DC voltage at required level under varying load and input voltage condition. The control of output voltage is performed in a closed loop using the principle of negative feedback.The fuzzy logic controller for DC-DC converters i.e. Fly-Back Converter offers an alternative way to implement a central action that exploits the inherent variable structure nature of converter. The controller acts fast to changes in the converter output voltage producing good load regulation. This control technique offers converter stability for robustness, good dynamic response and implementation is simple. Hence, this paper is the result of an attempt to design aDC-DC Fly-Back Converter and an FLC for the same. The paper also draws a comparison between a conventional PI and fuzzy controllers for the aforementioned converter.

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2014

K. Nayana, Sailaja, V., Dr. K. Deepa, and Manjunath, H. V., “A DC-DC multi-output SEPIC converter for suburban power application”, in Electronics, Communication and Computational Engineering (ICECCE), 2014 International Conference on, Hosur, 2014.[Abstract]


Non conventional sources of energy are those which are depleting day by day. Solar energy which is abundant in India has gained more importance hence. The energy produced by the sun, is harnessed with the help of PV panels and injected to converters and rectifiers. It is subsequently fed to an inverter that produces an AC power. In this paper, a PV panel fed modified dual output SEPIC converter is proposed. Dual outputs obtained from the modified multi output SEPIC converter is used to charge two batteries which in turn are fed to the cascaded multilevel DC/AC inverter. The simulation analysis of the system proves that it is well suited for both resistive and inductive loads; hence it is proposed for driving a motor load in rural areas agricultural applications. This system can be deployed in areas where grid connection is not possible such as in isolated or rural areas. More »»

2014

S. Athira and Dr. K. Deepa, “Solar powered ultrasonic cleaner”, in Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD), 2014 Annual International Conference on, Kottayam, 2014.[Abstract]


A Dual output half bridge converter combined with a resonant parallel fed inverter for ultrasonic cleaner is presented in this paper. The output of the inverter is 230V sinusoidal voltage with high frequency (28kHz) for ultrasonic cleaner applications. To obtain better load regulation PI controller is incorporated with the system for regulating 20% of load change. The simulation is carried out for a 58W power application. Solar power is used as input for the converter and output of the converter acted as the input for the inverter. More »»

2014

Dr. K. Deepa, Padmaja, P. J., and M Kumar, V., “Cascoded multi output push-pull converter”, in 2014 International Conference on Advances in Electrical Engineering, ICAEE 2014, Vellore, Tamilnadu, 2014.[Abstract]


<p>Multi-output DC-DC converters are widely used in many applications such as military, communication automobile, space application etc.. The DC-DC converters which is used for aerospace applications, has important role in ensuring the complete success of the mission. DC-DC converter is used for providing a regulated voltage to various subsystems of satellites with variation in input voltage and output resistive load. Different types of DC-DC converters were analyzed and out of all DC-DC converters, push-pull converter achieves tight regulation in the output voltage, So a push-pull converter for low power is designed for providing regulated power supply to the spacecraft. This paper deals with the design and closed loop implementation details of cascoded multi output push-pull converter with PWM controller IC (UC 3825). The results obtained in simulation and hardware implementation is presented and analyzed in detail for 9W, 50 kHz laboratory prototype developed. © 2014 IEEE.</p>

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2014

T. P. Marshal and Dr. K. Deepa, “Hybrid renewable energy system: Optimum design, control and maximum utilization with SIBB converter using DSP controller”, in Power and Energy Systems Conference: Towards Sustainable Energy, 2014, 2014.[Abstract]


Global warming and the shortage of fossil fuels increase the usage of renewable energy resources to satisfy the future energy demand of our depleting planet. This paper presents an innovative Switching logic for hybrid Distributed Energy Generators (DEG) by using a Single Input Buck-Boost (SIBB) converter and DSP controller based on their availability. With this proposed logic maximum amount of energy is extracted from the renewable energy resources depend on their availability. The combination of suggested switching logic and circuit configuration allows the two renewable energy resources, to supply the load individually or simultaneously based on the availability. The fast operation and reliability of DSP controller is utilized to increase the efficiency of the proposed system at the most. At any given instant to achieve extreme system efficiency three different modes of operations are projected. To analyze the real time feasibility of this logic the system is simulated by using MATLAB/Simulink 2010a; and the obtained results are studied and presented in the past. In laboratory a hardware model of the system is developed along with integrating the switching logic proposed for the learning of system in contradiction of the real world conditions. The results attained are discussed and presented in this paper.

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2013

Dr. K. Deepa, Deepti, T., and Kumar, V., “New multi-output switching converter with low drop out post regulator”, in Emerging Trends in Communication, Control, Signal Processing & Computing Applications (C2SPCA), 2013 International Conference on, Bangalore, 2013.

2013

Dr. K. Deepa, Vijayan, A., and M Kumar, V., “Closed loop controlled solar fed post regulated push-pull converter”, in Control Communication and Computing (ICCC), 2013 International Conference on, Thiruvananthapuram, 2013.[Abstract]


A solar fed push-pull converter employing post regulation method with soft commutated switches is discussed in the paper. Incorporating an inductor in series with the source the converter operates as a current fed one. The post regulation is carried out with an auxiliary current transformer. The post regulation technique utilizes the Transformer Turns Ratio Regulator concept which adds or subtracts voltage to the output of the push-pull converter. A boost converter is incorporated at the secondary side of the transformer and a current is fed to the input of the converter. The amount of current fed is controlled by the regulator circuit which handles only a percentage of the total output power. The power handling capacity of the load is enhanced with an improvement in efficiency and regulation. The size and weight of the converter is reduced by suitably selecting higher switching frequencies. In order to reduce the switching losses, zero voltage and zero current switching (ZVZCS) have been employed. The remarkable feature of the paper presented is that the soft switching is not affected by load variations. This is discussed in detail with resonant waveforms, output waveforms and efficiency curves. More »»

2013

Dr. K. Deepa, Saju, H. Merin, and M. Kumar, V., “Soft switched flyback converter for SMPS applications”, in Control Communication and Computing (ICCC), 2013 International Conference on, Thiruvananthapuram, 2013.[Abstract]


Isolated converters find wide application in SMPS, telecommunication, rectifiers etc. Among these topologies flyback converter is best opted for SMPS applications due to its simplicity in design, operation and less component count. High frequency dc-dc converters are subjected to high switching losses hence an auxiliary switch is designed to perform soft switching in main switch. The devices used in the converter are operated either in ZVS or ZCS to reduce the switching loss of the converter. This improves the converter performance. The converter designed is simulated, realized and presented in detailed for a laboratory model of 1.08W, 3.3V, 50 kHz.

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2013

Dr. K. Deepa, Padmaja, P. J., and Kumar, V., “PWM closed loop controlled multi-output push-pull converter”, in Control Communication and Computing (ICCC), 2013 International Conference on, 2013.[Abstract]


The DC-DC converter of a spacecraft is one of the basic components of a satellite, which has important role in ensuring the complete success of the mission. For providing a regulated voltage to various subsystems of satellites with variation in input voltage and output resistive load, DC-DC converter is used. This work presents a brief idea about the study, design and implementation of push-pull converter, PWM controller and lag-lead controller. The various topologies for DC-DC converter are studied and out of all DC-DC converters, push-pull converter is the one which can achieve tight regulation on the output voltage. So a push-pull converter for low power is designed for providing regulated power supply to the telemetry tracking transmitter subsystem in satellite. This work deals with the design and implementation details of multi output push-pull converter with PWM controller IC (UC 3825). The results obtained in hardware implementation is presented and analyzed in detail for 7W, 50 kHz laboratory prototype developed. More »»

2012

Dr. K. Deepa and Vijayakumar, M., “An Improved Push-Pull Converter with ZVS-ZCS in Active and Passive Switches for Low Voltage Applications”, in International conferences on Control System and Power Electronics – CSPE 2012, 2012, vol. 2012, pp. 240–245.

2012

Dr. K. Deepa, Jeyanthi R., and M Kumar, V., “Efficient and compact power supply for robotic application”, in IET Conference Publications, 2012, vol. 2012, pp. 61-65.[Abstract]


Robots require compact, power efficient and regulated power supplies for their efficient operation. This paper deals with the problem of developing such a power supply. A single-output zero voltage switching pushpull converter with low switching and conduction losses for robotic applications has been presented in this paper. The proposed converter is designed for outputs of 5 V/1 A with a switching frequency of 50 KHz. A prototype model of this converter is developed and was used to power a dc servo motor of 5V/1A/0.5Nm/950rpm. The results obtained from the experimental set-up are presented and analysed in detail. The results reveal the superiority of the proposed method.

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2012

Dr. K. Deepa and M Kumar, V., “Performance analysis of a DC motor fed from ZCS-quasi-resonant converters”, in Power Electronics (IICPE), 2012 IEEE 5th India International Conference on, Delhi, 2012.[Abstract]


This paper presents a comparative study of the ZCS-QRC fed Dc servo drive at various switching frequencies such as 100kHz, 50kHz and 10kHz. The significant characteristic of QRC is that the switching devices can be either switched on at zero voltage or switched off at zero current, so that switching losses, stresses are low and volume is reduced moreover power density is high. These features increase the efficiency of the converters. The regulation of QRC is achieved by varying the switching frequency of the converter. Hence, called Frequency modulated Zero current switching quasi resonant converter. This paper reports the simulation and hardware implementation of DC Servo motor fed from ZCS-QRC in half wave and full wave modes.

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2012

Dr. K. Deepa, Sharika, M., and M Kumar, V., “Implementation of a new multi output push-pull primary ZVS converter”, in India International Conference on Power Electronics, IICPE, Delhi, 2012.[Abstract]


<p>This paper introduces a new multi-output push-pull primary Zero Voltage Switching Converter (ZVS) in continuous conduction mode. Theoretical analysis and design methodology for a 5W, 50 kHz laboratory prototype push-pull ZVS are discussed in this paper. Simulation of the proposed circuit was carried out with PSIM software and the results obtained are analogous to the results obtained from hardware prototype. Both the results are presented and analysed. The proposed new converter is suitable for communication, automobile, computer and aerospace applications to supply power to more loads. The necessity of more than one single output converters is reduced by this proposed multi output converter. © 2012 IEEE.</p>

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2012

T. Deepti, Dr. K. Deepa, and Chandran, S., “Implementation and comparison of a new MOC with post regulators”, in India International Conference on Power Electronics, IICPE, Delhi, 2012.[Abstract]


<p>A comparative study of two different types of post regulators is carried out in this paper. First one is low drop out post regulator (LDO) and second one is DC-DC step down LTM 4601 HV post regulator. These post regulators regulate the auxiliary high power output of the multi-output flyback dc-dc converter, designed for providing supply for the telemetry tracking transmitter subsystem of the satellite. The requirements for space applications are taken into consideration while designing. © 2012 IEEE.</p>

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2012

Dr. K. Deepa, Sharika, M., and M Kumar, V., “Implementation of a SISO-ZVS push-pull converter fed DC servo motor”, in India International Conference on Power Electronics, IICPE, Delhi, 2012.[Abstract]


<p>A single-output zero voltage switching push-pull converter with low switching and conduction losses for robotic applications is presented in this paper. The proposed converter is designed for output of 5 V/ 1 A with a switching frequency of 50 kHz to drive a DC servo motor used in robots. The proposed converter is compact since high switching frequency of operation is chosen. Resonant technique added to the converter reduces the switching stress, losses and thereby increases its efficiency. A prototype model of this converter is developed and the hardware is implemented. The results obtained from the experimental setup are analyzed in detail. The results reveal the superiority of the proposed method. © 2012 IEEE.</p>

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2011

Dr. K. Deepa, Savitha, P., and Vinodhini, B., “Harmonic analysis of a modified cascaded multilevel inverter”, in 2011 1st International Conference on Electrical Energy Systems, ICEES 2011, Chennai, Tamilnadu, 2011, pp. 92-97.[Abstract]


In Multilevel Inverters, Cascaded H bridge converters are considered to be the most preferred form of converters. But in these converters as the number of staircase levels in output voltage increases the dc source requirement also increases, thereby limiting its application. This paper tries to address the above mentioned problem by developing a Modified version of Cascaded Multilevel Converters which require reduced number of dc voltage source for increased levels in output voltage as compared to conventional cascaded converters. The spectral quality analysis of output voltage obtained for different loads is also shown signifying the merits of modified converters. Due to these advantages the drawback in the implementation of conventional cascaded converters in electric vehicles or in industrial applications is overcome by modified cascaded inverters. In this paper, the developed Modified Cascaded Converters are simulated in MATLAB/ SIMULINK and the THD of different output voltage levels are compared for different loads. © 2011 IEEE.

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2010

J. R, Dr. K. Deepa, and selvi, A., “PI/EPI/FUZZY Controller Approach for a 100kHz Single Hard Switched Buck-Boost Converter”, in International Conference On Intelligent Design and Analysis of Engineering Products, Systems and Computation, 2010.

2005

S. Arulselvi, Dr. K. Deepa, and Uma, G., “Design, analysis and control of a new multi-output flyback CF-ZVS-QRC”, in Industrial Technology, 2005. ICIT 2005. IEEE International Conference on, 2005.

Publication Type: Journal Article

Year of Publication Title

2021

T. Duraisamy and Dr. K. Deepa, “Evaluation and Comparative Study of Cell Balancing Methods for Lithium-Ion Batteries Used in Electric Vehicles”, International Journal of Renewable Energy Development, vol. 10, pp. 471–479 doi = 10.14710/ijred.2021.34484, 2021.[Abstract]


Vehicle manufacturers positioned electric vehicles (EVs) and hybrid electric vehicles (HEVs) as reliable, safe and environmental friendly alternative to traditional fuel based vehicles. Charging EVs using renewable energy resources reduce greenhouse emissions. The Lithium-ion (Li-ion) batteries used in EVs are susceptible to failure due to voltage imbalance when connected to form a pack. Hence, it requires a proper balancing system categorised into passive and active systems based on the working principle. It is the prerogative of a battery management system (BMS) designer to choose an appropriate system depending on the application. This study compares and evaluates passive balancing system against widely used inductor based active balancing system in order to select an appropriate balancing scheme addressing battery efficiency and balancing speed for E-vehicle segment (E-bike, E-car and E-truck). The balancing systems are implemented using “top-balancing” algorithm which balance the cells voltages near the end of charge for better accuracy and effective balancing. The most important characteristics of the balancing systems such as degree of imbalance, power loss and temperature variation are determined by their influence on battery performance and cost. To enhance the battery life, Matlab-Simscape simulation-based analysis is performed in order to fine tune the cell balancing system for the optimal usage of the battery pack. For the simulation requirements, the battery model parameters are obtained using least-square fitting algorithm on the data obtained through electro chemical impedance spectroscopy (EIS) test. The achieved balancing time of the passive and active cell balancer for fourteen cells were48 and 20 min for the voltage deviation of 30 mV. Also, the recorded balancing time was 215 and 42 min for the voltage deviation of 200 mV.

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2021

T. Duraisamy and Dr. K. Deepa, “Adaptive passive balancing in battery management system for e-mobility”, International Journal of Energy Research, vol. 45, pp. 10752-10764, 2021.[Abstract]


Summary Balancing the lithium-ion battery pack is essential to enhance the energy usage and life cycle of the battery. This paper analyses passive cell balancing method of Li-ion battery for e-mobility application based on the energy loss and cost estimation through simulation and hardware implementation. As a part of the simulation, an electrical equivalent circuit battery model is developed and model parameters are obtained using electrochemical impedance spectroscopy test. The experimented passive balancing topologies include a switched shunting resistor circuit with appropriate control logic. Final voltage-based balancing algorithm is implemented to balance the cells at high state of charge. Experimental results are compared against the theoretical investigation. Based on the outcome of this experiment, the most significant characteristics of the passive balancing system can be developed by considering the impact on the battery performance, energy loss, and cost.

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2021

D. Thiruvonasundari and Dr. K. Deepa, “Optimized Passive Cell Balancing for Fast Charging in Electric Vehicle”, IETE Journal of Research, pp. 1-9, 2021.[Abstract]


Electric vehicles (EVs) are clean substitutes for conventional vehicles. Battery management system (BMS) is the intelligence behind the EV battery packs. One of the key functions of BMS is cell balancing, which balances the battery cells voltages equally during charging. Most of today’s EVs are adopting a passive cell balancing scheme, which uses fixed dissipative resistors to remove the extra charge from the overcharged cell to balance the charge in all the cells equally. One of the main concerns about the passive balancer is the balancing time. The long balancing time is manageable if the vehicle is charged through conventional charging (5–6 h) system and cell imbalance is minimum. Under fast DC charging scenarios as well as maximum imbalance condition, passive balancing with a fixed resistor is not an optimum solution. Either for fresh cell or aged cell, the passive cell balancing with variable balancing resistor is used based on the balancing current requirement under slow or fast charging scenarios are implemented. The passive system with variable resistor outcome is compared using Matlab-Simscape.

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2020

R. P. Eldho and Dr. K. Deepa, “A comprehensive overview on the current trends and technological challenges in energy storages and charging mechanism in electric vehicle”, Journal of Green Engineering, vol. 10, pp. 4679–6713, 2020.

2020

P. Thayumanavan, Dr. K. Deepa, Aishwarya S., E, B., and S, S., “Solar PV fed Super-Lift LUO Converter and mod- ified SEPIC Converter for LED Drivers”, Test Engineering and Management, pp. 2627-2635, 2020.[Abstract]


Advancements in Photovoltaic (PV) technologies has enabled the harnessing of solar power for energy, even in remote locations such as rural areas which has given rise to the advent of Distributed Generation (DG). PV array is an intermittent source of power due to its dependence on solar irradiance. DC-DC converters along with MPPT control algorithm form an integral part of a PV system enabling a regulated output with maximum gain and high conversion efficiency. This paper undertakes two popular converters, a Modified SEPIC converter and Super-Lift LUO converter, for powering LED driver. Some of the advantages of a Super-Lift LUO converter are reduced ripple current, high voltage transfer gain, high efficiency and a high power density while Modified SEPIC converter has low output voltage ripple, non-inverting output and less switching voltage stress. MATLAB/Simulink environment is used to simulate the converters. A prototype hardware implementation of the converters is also undertaken. The experimentation results obtained are shown. This paper proves that Modified SEPIC is more efficient than Super-Lift LUO converter for LED Drivers .

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2020

Dr. K. Deepa, Subramaniam, U., Bhaskar, M. Sagar, Sanjeevikumar, P., Leonowicz, Z., Mitolo, M., and Porselvi, T., “Combined Harmonic Reduction and DC Voltage Regulation of A Single DC Source Five-Level Multilevel Inverter for Wind Electric System”, Electronics (Switzerland), 2020.[Abstract]


Wind power generation has increased in the past twenty years due to the development of power electronic converters. Power generation through wind has advantages over other renewable sources, such as having more efficiency, being pollution-free, and its abundant availability. Power electronic converters play a vital role in the wind energy conversion system. This paper presents a wind-electric system with a permanent magnet synchronous generator, diode rectifier, DC-DC converter (buck-Boost or Cuk converter), and a three-phase five-level inverter. The five-level inverter is a modified form of a cascaded H-bridge inverter that uses a single DC source as an input irrespective of several levels and phases. As the wind speed changes, the Permanent Magnet Synchronous Generator (PMSG) voltage and frequency changes, but for practical applications, these changes should not be allowed; hence, a voltage controller is used that maintains the output voltage of a DC converter, andthus a constant AC output is obtained. The DClink voltage is maintained at the desired voltage by a Proportional plus Integral (PI)-based voltage controller. The DC link voltage fed to the multilevel inverter (MLI) is converted to AC to feed the load. The MLI is controlled with a new Selected Harmonic Elimination (SHE), which decreases the total harmonic distortion (THD). The system is simulated with an Resistive plus Inductive (RL)load and is tested experimentally with the same load;the results prove that the Cuk converter has a better efficiency compared to the Buck-Boost converter, and the system has less THD when compared with the conventional SHE Pulse Width Modulation (PWM) technique.

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2020

T. Duraisamy and Dr. K. Deepa, “Active cell balancing for electric vehicle battery management system”, International Journal of Power Electronics and Drive Systems (IJPEDS), vol. 11, p. 571, 2020.[Abstract]


The shrink in accessibility of petroleum products and increment in asset request are eventual outcomes for Electrical Vehicles (EVs). The battery has an impact on the performance of electrical vehicles, the driving range. Lithium ion (Li-ion) chemistry is extremely sensitive to overcharge and deep discharge, which can harm the battery, shortening its period of time, and even inflicting risky things. The Battery Management System (BMS) comprises of the consequent parts: management, equalization and protection. Of the three components, equalization is that the most crucial with respect to the durability of the battery framework. The ability of the full pack diminishes rapidly amid the procedure which leads to degradation of the full battery framework. This condition is extreme once the battery incorporates a more number of cells in series and frequent charging is conveyed through the battery string. The cell imbalance during charging, discharging is a major issue in battery systems used in EVs. To circumvent the cell imbalance, cell balancing is used. Cell balancing enhances battery safety and extends battery life. This paper discusses about different active balancing method to increase the life span of the battery module. Based on the comparison, the inductor based balancing method for 60V battery system is implemented in the MATLAB/Simscape environment and the results are discussed.

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2020

Dr. K. Deepa, Mahalakshmi, R., and Reddy, S., “Bio-diesel fed solar excited synchronous generator”, Journal of Green Engineering, 2020.[Abstract]


As the electricity demand is increasing exponentially, generating enormous electricity from various power plants such as diesel, thermal, etc., is very much essential. The synchronous generator (SG)-diesel engine-based power plant which use the fossil fuel and coal as a source material is commercially used in power plants. These source materials and the operation of diesel engine are the main cause of emission of greenhouse gases. In order to have the green power generation from SG based power plant, this paper proposes the Bio-Diesel fed Solar Excited Synchronous Generator (BDfSESG). This green plant is formed by replacing the conventional diesel engine into biodiesel engine and DC exciter of SG by DC-DC converter tied solar array with the battery backup system. The proposed green power plant can be utilized for many applications, this paper focuses on the green electricity generation for the induction motor load applied in sugar industry. The biodiesel can be produced with the help of wastages from the sugar industry. Hence this makes the power plant cost effective. In addition, the surplus power has been injected to the grid according to the requirement. Total Harmonics Distortion (THD) analysis has been done at grid and Point of common coupling (PCC) respectively. A simulation has been done in MATLAB(SIMULINK) and the results have been discussed and analyzed.

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2020

T. Duraisamy and Dr. K. Deepa, “Electric Vehicle Battery Modelling Methods Based on State of Charge-Review”, Journal of Green Engineering, vol. 10, pp. 24-61, 2020.[Abstract]


Battery behavior prognostic is an important concern in most of the applications especially in electric vehicles which are using lithium ion batteries. Battery performance estimation methods will improve the life span by preventing over-discharge and overcharge, yielding increased battery life. It allows the battery user to make out the available energy in the battery stack. Therefore an accurate, easy to use battery model should be established to estimate the battery parameters. In this paper five important lithium-ion battery models such as Empirical, Equivalent circuit, Electro chemical, Reduced-order and Data driven models are discussed based on the State of charge estimation and compared along with their advantages and disadvantages. Battery model parameters are obtained by using Electro-chemical Impedance Spectroscopy (EIS) test and the implementation details are presented.

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2018

R. Mahalakshmi, Dr. K. Deepa, and Thampatty, S., “Analysis of Multi Level Current SourceInverter for LowTorque Applications”, Journal of Green Engineering, vol. 8, pp. 597-620, 2018.[Abstract]


This paper proposes a control strategy for a multi-level Current Source Inverter (CSI) which acts as an interface between renewable energy sources such as wind, solar, fuel cell etc. and grid/loads to satisfy the power demand. The control strategy aims to reduce the number of switches and the number of input sources used in the CSI and obtain an output with least Total Harmonic Distortion (THD) and increased number of levels (13). The proposed system uses seven switches and three current sources to obtain a 13 level output. The new control strategy is tested in different operating conditions in a split phase single phase low torque induction motor. The Simulation model is developed in MATLAB/Simulink. THDs of 13 level outputs from current source inverter is analyzed and compared in detail. A comparative analysis of the proposed CSI with existing CSI topologies is made. It is observed that the proposed topology uses less number of switches and inductors to obtain different levels at the output. The proposed inverter provides better performance with satisfactory results.

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2018

S. Sasikumar and Dr. K. Deepa, “LCL Topology Based Single Stage BoostRectifier Topology for Wireless EV Charging”, Journal of Green Engineering, vol. 8, pp. 573-596, 2018.[Abstract]


Research into Wireless power transfer, its applications and adoption is currently growing at a rapid rate. Wireless Power Transfer (WPT) provides a lot of advantages and serves as a solution to the drawbacks of wired power transfer techniques. Research nowadays is focused on developing an inductive power transfer module for transferring power wirelessly. In order to improve the efficiency and the range of power transfer, new coil structures and design schemes for wireless power transfer have been introduced. This paper provides a comparative study of a WPT circuit with a boost rectifier circuit and another with a single-stage boost rectifier circuit, with focus on reducing switching losses and complexity. The DC side inductor and switch of the boost circuit is replaced with an AC side inductor to overcome the disadvantages of boost circuit. For each circuit explained in this paper, Matlab simulation results of output voltage, current and efficiency are analyzed and presented.

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2018

A. D. Nidhis, Pardhu, C. N. V., K. Reddy, C., and Dr. K. Deepa, “Smart crop health diagnosis and treatment unit powered by green fuel”, Journal of Green Engineering, vol. 8, pp. 389-410, 2018.[Abstract]


Majority of India’s economy depends on agriculture. Rice being the staple food for people of eastern and southern parts of India, its yield directly depends on the lives of the farmers. Among various diseases that affect the Paddy crop, Blasts in leaves are predominant. Without sufficient knowledge about the health of the crop, cultivators may use excessive pesticides which affects the environment in various phases. Energy being one of the major crisis, agriculture sector does not get proper supply of electricity to maintain the yield. The proposed project establishes an effective solution for the above mentioned problems by integrating Solar Power and a system to monitor the crop health and provide treatment, if necessary. Rural street lighting can be an added advantage of the project. © 2018 the Author(s). All rights reserved.

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2018

P. T, Dr. K. Deepa, and R, M., “Hardware Implementation Of Three Phase Five-Level Inverter With Reduced Number Of Switches For PV Based Supply”, Journal of Green engineering, vol. 7, no. 4, pp. 527- 546, 2018.[Abstract]


This paper proposes a three phase five-level inverter which uses a single DC (PV) source, unlike a conventional cascaded H-bridge (CHB) which requires multiple DC (PV) sources, and also a novel Selective Harmonic Elimination Pulse Width Modulation (SHE-PWM) for reduced voltage Total Harmonic Distortion (THD) compared to a conventional SHE-PWM. The proposed inverter uses reduced number of switches when compared to conventional inverter. The proposed three phase inverter is simulated in MATLAB with both conventional and new SHE-PWM techniques. The simulated waveforms of the line, phase voltages and load current are studied in detail. A comparison of THD values is for both conventional and proposed SHE-PWM is presented. This is followed by the hardware implementation of the proposed inverter with the new SHE-PWM, and the results for line, phase voltages and the load currents are again reviewed. The hardware results are found to match the simulation results. The results confirm that the proposed SHE-PWM has the ability to deliver a reduced THD when compared to a conventional SHE-PWM.

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2018

T. Porselvi, Dr. K. Deepa, and Muthu, R., “FPGA Based Selective Harmonic Elimination Technique for Multilevel Inverter”, International Journal of Power Electronics and Drive Systems, vol. 9, pp. 166-173, 2018.[Abstract]


Harmonic elimination at the fundamental frequency is very much appropriate for high and medium range of power generation and applications. This paper considers a new technique for selective harmonic elimination (SHE), in which the total harmonic distortion (THD) is minimized when compared with that of the conventional one. With this technique, the harmonics at lower order are eliminated, which are more predominant than the higher ones. Cascaded H-Bridge inverter fed by a single DC is considered which is simulated with the switching angles generated by both the conventional method of SHE and the new method of SHE. The simulated results of the load voltage and the waveforms of the harmonic analysis are shown. The THD values are compared for the two techniques. The experimental results are also shown for the new technique. The switching angles are generated with the help of field programmable gated array (FPGA) in the hardware. The value of experimental THD of voltage is compared with that of simulated THD and the comparison prove that the results are satisfactory.

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2017

Dr. K. Deepa and V, P. Kumar., “Voltage Imbalances Mitigation Analysis for 1F Grid Connected Load Conditions”, International Journal of Control Theory and Applications, vol. 10, pp. 23-32, 2017.

2016

Dr. K. Deepa and Yadava, A., “PV Array Based HERIC Inverter Topology for Irrigation Pump”, International Journal of Control Theory and Applications, vol. 9, pp. 197-203, 2016.

2016

R. George, M, S., and Dr. K. Deepa, “Implementation Of Wireless Charging System Using Single Stage Power Conditioning Circuit At Receiver”, International Journal of Control Theory and Applications, vol. 16, pp. 7939-7950, 2016.[Abstract]


Wireless transfer of electric power is being adopted as a viable method of charging portable devices as it makes them safer, raises their mobility and reliability and reduces the cost. Though efficient transmitter driver circuits and optimized coil designs have been developed by researchers in recent years, power conditioning at the receiver side haven’t got much attention. To reduce the number of components and the associated losses, the traditional two stage power conditioning should be replaced by an efficient and more compact single stage converter. This paper proposes an efficient wireless charging system based on resonant magnetic coupling that contains single stage boost rectifier at receiver. Single stage rectification and boosting is made possible by the bidirectional conduction ability of MOSFETs. The system is simulated in PSIM software, where overall power transfer efficiency is analyzed for different coupling factors, and different loads. The prototype of the entire system was developed in the laboratory by integrating coils and converters. The two fundamental concepts of power transmission, energy efficiency and transmission distance capabilities are analyzed and the results were found to be quite promising for practical use of this system

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2016

K. A. Lakshmypriya and Dr. K. Deepa, “100 kHz high voltage power supply for travelling wave tube”, International Journal of Control Theory and Applications, vol. 9, pp. 7187-7195, 2016.[Abstract]


Travelling Wave Tube (TWT) is a high gain microwave amplifier used in RADAR transmitters. TWTs require a highly sophisticated high voltage power supply for powering its electrodes viz., cathode and collectors. The high voltage power supply should have low output ripple and good regulation(few hundreds of millivolts) on cathode to obtain good RF performance and the power supply needs to be short circuit protected. This paper presents the high voltage power supply designed for a TWT based radar transmitter with electrode voltages of -9kV, -4.4kV and - 6.2kVDC. Input voltage of the high voltage power supply (HVPS) is 65VDC. The high voltage output is achieved with a series resonant converter operating at a high frequency of 100 kHz. The inverter output is stepped up by a high voltage high frequency transformer. The transformer output after rectification is filtered and fed to TWT. The output voltage is regulated using phase shift control. This work is further extended in the implementation of the designed high voltage power supply in hardware.

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2016

Dr. K. Deepa, “Design analysis and control of dc to dc quasi resonant converters”, Shodhganga : a reservoir of Indian theses @ INFLIBNET, 2016.[Abstract]


Pulse Width Modulation (PWM) based DC-DC converters are widely used in industrial applications such as DC motor drives, computer systems, aerospace systems and communication equipment. PWM converters operating at low frequency have certain drawbacks, primarily- increased size and weight of the power supplies. Also, since PWM converters are basically non-linear systems, they need to be averaged and linearized to obtain linear time-invariant models. Hence the design of high performance control for these converters is a challenging issue. More »»

2016

R. George, Sreekala, M., Dr. K. Deepa, S., D. S., S., D., and A., B. M., “Single-stage boost rectifier for wireless charging of portable devices through magnetic resonant coupling”, Advances in Intelligent Systems and Computing, vol. 394, pp. 443-452, 2016.[Abstract]


Advancements in power electronics have aided in the development of inductive power transfer technologies by providing transmitter coil drivers and converters for conditioning the power received at the receiver coil. But the use of traditional two-stage circuit with half wave or full wave rectifiers and boost converter at the receiver side may be inefficient, as it reduces the total power delivered to the load. As an alternative, single-stage boost rectifier can be used, which is compact and more efficient. This paper introduces an efficient wireless charging system based on resonant magnetic coupling that contains single-stage boost rectifier at receiver. Single-stage rectification and boosting is made possible by the bidirectional conduction capability of MOSFETs. The system is designed and simulated in PSIM software. The overall power transfer efficiency of the system is analyzed for different coupling factors of the inductive links and for different loads. © Springer India 2016.

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2015

P. Nair and Dr. K. Deepa, “Feed-Forward Control Algorithm for Hybrid Energy Systems”, Procedia Technology, vol. 21, pp. 575–580, 2015.[Abstract]


The paper presents a comparative analysis of the control strategies that can be used for hybrid energy systems. In the system considered, solar energy and battery are the two input sources to the DC-DC converter. Due to the intermittent availability of solar energy, a control circuit needs to be designed for the voltage regulation of the hybrid energy system. A single input fuzzy logic controller can maintain the output voltage constant for variations in either Photovoltaic (PV) or battery voltage only. Hence a control strategy is proposed in More »»

2015

S. Athira and Dr. K. Deepa, “Modified Bidirectional Converter with Current Fed Inverter”, International Journal of Power Electronics and Drive Systems, vol. 6, pp. 387-395, 2015.[Abstract]


A bidirectional dc-dc converter with multiple outputs are concatenated with a high frequency current source parallel resonant push pull inverter is presented in this paper. The two outputs are added together and it is taken as the input source for the inverter. The current source parallel resonant push pull inverter implemented here with high frequency applications like induction heating, Fluorescent lighting, Digital signal processing sonar. This paper proposes a simple photovoltaic power system consists of a bidirectional converter and a current fed inverter for regulating the load variations. Solar power is used as the input source for the system. Simulation of the proposed system is carried out in PSIM software and experimentally verified the results. © 2015 Institute of Advanced Engineering and Science. All rights reserved.

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2015

Dr. K. Deepa, Saju, H. Merin, and M Kumar, V., “Soft Switched Multi-Output Flyback Converter with Voltage Doubler”, International Journal of Power Electronics and Drive Systems (IJPEDS), vol. 6, no. 2, pp. 396–403, 2015.[Abstract]


A novel multi-output voltage doubler circuit with resonant switching technique is proposed in this paper. The resonant topology in the primary side of the flyback transformer switches the device either at zero voltage or current thus optimizing the switching devices by mitigating the losses. The voltage doubler circuit introduced in the load side increases the voltage by twice the value thereby increasing the load power and density. The proposed Multi-output Isolated Converter removes the need for mutiple SMPS units for a particular application. This reduces the size and weight of the converters considerably leading to a greater payload. This paper aims at optimizing the proposed converter with some design changes. The results obtained from the hardware prototype are given in a comprehensive manner for a 3.5W converter operating at output voltages of 5V and 3.3V at 50 kHz switching frequency. The converter output is regulated with the PI controller designed with SG3523 IC. The effects of load and line regulation for ±20% variations are analyzed in detail.

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2015

Dr. K. Deepa, Kurian, S. M., and M Kumar, V., “Improvement of efficiency in an active clamp ZVS multi-output flyback converter with voltage doubler by using UC3825 analog controller”, International Journal of Applied Engineering Research, vol. 10, pp. 1671-1686, 2015.[Abstract]


This paper proposes a voltage doubler for a multi-output active clamp ZVS flyback converter, aiming to achieve superior efficiency for low power applications which demand constant power supply. In order to increase the power packing density, a trouble-free control technique with analog controller UC 3825 is used to regulate the output voltage against load variations and supply disturbance. The design, operation and results of the proposed converter is explained in detail and analyzed. The guiding principles for component design are specified and confirmed. Investigational results obtained from a prototype of a 3.5W are presented. Performance assessment of the proposed converter with the existing topology is made and the conclusions derived are highlighted. © Research India Publications.

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2014

Dr. K. Deepa, Saju, H. Merin, and M Kumar, V., “High Efficiency Single Output ZVS–ZCS Voltage Doubled Flyback Converter”, Journal of The Institution of Engineers (India): Series B, pp. 1–8, 2014.[Abstract]


A switch operating at high switching frequency increases the switching losses of the converter resulting in lesser efficiency. Hence this paper proposes a new topology which has resonant switches [zero voltage switching (ZVS)] in the primary circuit to eliminate the above said disadvantages, and voltage doubler zero current switching (ZCS) circuit in the secondary to double the output voltage, and hence the output power, power density and efficiency. The design aspects of the proposed topology for a single output of 5 V at 50 kHz, its simulation and hardware results are discussed in detail. The analysis of the results obtained from a 2.5 W converter reveals the superiority of the proposed converter. More »»

2014

Dr. K. Deepa and M Kumar, V., “ZVS Multi-output Push-pull QRC Using Analog Controller UC3825 for Low Power Applications”, AASRI Procedia, vol. 7, pp. 62–67, 2014.

2013

Dr. K. Deepa, Jeyanthi, R., and M Kumar, V., “Analysis of a Quasi Resonant Switch Mode Power Supply for Low Voltage Applications”, International Journal on Electrical and Power Engineering, vol. 4, no. 2, pp. 85-92, 2013.[Abstract]


QRC provides efficient and regulated switch mode power supplies for robotic and satellite applications. This article addresses the enhanced controller techniques for high frequency isolation based push-pull Quasi Resonant Converter. This technique is similar to the conventional PI controller technique but varies only the enhancement constants to improve the time domain response of the converter. The proposed converter is designed for low output voltage and power rating, characteristically 5V and 5 W, with the comprehension of current design trends towards enhanced performance. At the primary stage, to validate the design of the converter, simulation is performed in PSIM for ±50% load variations. A prototype model of this converter is developed. The results obtained from the experimental set-up are presented, and analysed in detail. The results reveal the superiority of the proposed method. More »»

2013

Dr. K. Deepa, Kurian, S. Mary, and Vijaya, K. M., “Active Clamp Zero Voltage Switching Multiple Output Flyback Converter with Voltage Doubler”, International Review on Modelling and Simulations (IREMOS), vol. 6, no. 2, pp. 351–359, 2013.[Abstract]


This paper proposes a multi output zero voltage switching flyback converter topology with actively clamped switch and voltage doubler circuit. Flyback is the most popular topology for isolated power supply. It can provide multiple isolated outputs with a single switch and has lesser number of component counts. But it suffers from major drawback of high switch current stress high eddy current loss in the air-gap area, a large transformer core, and potential EMI problems. Now a day the latter is overcome by soft switching commutation techniques zero voltage switching (ZVS) or zero current switching (ZCS).But the device still suffers from excessive voltage stress. To triumph over these shortcomings an active clamp flyback converter is proposed. Here the active clamped switch introduced is turned on at zero voltage, this action discharges energy from active clamp capacitor to transformer leakage inductance that is then used to discharge capacitor across the switch thus bringing down voltage across the switch to zero before turn on. The capacitor also acts as clamp that avoids excessive voltage ringing across the switches. The proposed converter has a voltage doubler rectifier in the secondary. So no dissipative RC snubber across the diode is needed and thus high efficiency, low noise output voltage can be realized. The operating principle and analysis of proposed converter are discussed in this paper in detail. The closed loop simulation with fuzzy logic controller is also presented and the analysis of the converter in terms of efficiency and regulation are analysed in detailed.

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2013

T. Deepti, Dr. K. Deepa, and M Kumar, V., “Design and implementation of 30W DC-DC converter for Aerospace application”, International Review on Modelling and Simulations (IREMOS), vol. 6, pp. 323–328, 2013.[Abstract]


The DC-DC converter of a Spacecraft is one of the vital components of a satellite, which has a major role in ensuring the complete success of the mission. For providing a regulated voltage to various subsystems of satellites with variation in input voltage, DC-DC converter comes in picture. This paper presents the design and implementation of 30W flyback converter for providing supply for the telemetry tracking transmitter subsystem of the satellite. The input EMI filters responses and compensator for PWM UC1825 is simulated in MATLAB. The requirements for space applications are taken into consideration while designing and is successfully implemented. More »»

2013

A. Vijayan, Dr. K. Deepa, and M Kumar, V., “Soft Switching Scheme for a Post-Regulated Current-Fed Push-Pull Converter”, International Review on Modelling and Simulations (IREMOS), vol. 6, no. 2, pp. 317–322, 2013.[Abstract]


A high-efficiency post regulation method for a zero-voltage and zero-current switching (ZVZCS) current-fed push–pull converter is presented. An auxiliary transformer is incorporated as a post regulator. An additional voltage is either added or subtracted by the regulator to the output filter of the push-pull converter. An auxiliary regulator controls this transformer and it handles only a percentage of the total output power. Therefore, compared to a normal pre-regulator, higher efficiency is obtained. Since the converter is designed for high operational frequency the size and weight of the converter can be reduced and in order to reduce the switching losses, soft switching techniques have been employed. The remarkable feature of the paper presented is that zero voltage and zero current switching is not affected in any of the working conditions.

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2012

A. Sivaprasad, Mathew, K., and Dr. K. Deepa, “Power Factor Corrected Battery Charger for Electric Vehicle”, CiiT International Journal of Programmable Device Circuits and Systems’s, 2012.[Abstract]


Power electronic circuits comprising of AC-DC converters and DC-DC converters are Integral part of modern day electric vehicle. Batteries play a major role in a electric vehicle. Thus the selection and implementation of battery charger using DC-DC converter has important role in the development of electric vehicle. In addition to this, the existing battery chargers are without power factor correction which will affect the life and performance of the battery. So this paper presents a charging circuit for batteries used in electric vehicle with the concept of power factor correction. This paper emphasis the necessity for a boost converter for the power factor correction. Half bridge converter topology is implemented for battery charging purpose and it is simulated using MATLAB software with rectifier and boost circuit for verifying the improvement in power factor correction. The power factors and harmonic distortion obtained are presented and analysed in detailed.

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2012

Dr. K. Deepa, ,, Mamatha, I., and kumar, D. M. Vijaya, “Digital Simulation of SISO-ZVS-Push pull Quasi Resonant Converter for Different Loads”, International Journal of Engineering Research and Applications (IJERA), vol. 2, no. 4, pp. 896–901, 2012.

2012

S. .A, Dr. K. Deepa, and .Mathew, K., “Half bridge Converter for Battery Charging Application”, International Journal of Engineering Research and Applications (IJERA), vol. 2, no. 4, pp. 994–999, 2012.

2012

J. Marshal TP and Dr. K. Deepa, “Single Input DC-DC Converter for Hybrid Distributed Energy Generators with Maximum Utilization using DSP Controller”, International Journal of Engineering Research and Applications (IJERA), vol. 2, no. 4, p. 989–to, 2012.[Abstract]


Environmental friendly solutions are becoming more prominent than ever as a result of concern regarding the state of our deteriorating planet. This paper presents a new DSP controller based Switching configuration of hybrid Distributed Energy Generators (DER) with a single input DC-DC Buck-Boost converter, based on their availability. This configuration allows the two sources to supply the load separately or simultaneously depending on their availability. Because of its fast operation and reliability, DSP controller is used to improve the system efficiency at the most. Maximum amount of energy is extracted from the available source based on the control logic proposed in this paper. The system can operate in three different modes to obtain maximum efficiency based on the logic projected. The system is simulated using MATLAB/Simulink 2010a, the obtained results are also analyzed and presented in this paper.

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2011

Dr. K. Deepa, Gopi, A., Sebastian, J., Sathyan, A. M., K. Manaswin, S., and Shivapramod, M., “Design of PI Controller for Multi Output Boost Converter”, CiiT International Journal of Programmable Device Circuits and Systems’s, pp. 461–465, 2011.

2010

R. Jeyanthi, Dr. K. Deepa, and Amitkumar, K. S., “A comparative study of PI and Fuzzy Based Controllers for DC-DC converters”, CiiT International Journal of Programmable Device Circuits and Systems’s, pp. 20–28, 2010.[Abstract]


Industrial, residential and aerospace environments widely use switching mode power supplies. Switching modepower supplies need to be of small size as well as highly efficient. Hence a high switching frequency is necessary for reducing the size of the converter. But as the switching frequency increases, switching loss will also increase. This will result in gradual decrease in the efficiency of the power supplied. This paper is an attempt to study the application of fuzzy based control for DC-DC converters operating at finite switching frequency. Conventional PI method currently used for buck boost converters is compared with the fuzzy based control. Simulation results are also presented. The simulations show that the fuzzy control method has better dynamic performance.

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Publication Type: Conference Proceedings

Year of Publication Title

2020

R. Sripradha and Dr. K. Deepa, “A new fragile image-in-audio watermarking scheme for tamper detection”, 2020 3rd International Conference on Intelligent Sustainable Systems (ICISS). 2020.

2020

M. Suri, Raj, N., Dr. K. Deepa, and Sarada Jayan, “Application of Aspiration Level Model in determining QoS for an EV battery charging station”, International Conference on Smart Technologies in Computing, Electrical and Electronics (ICSTCEE). IEEE, Bengaluru, India, 2020.[Abstract]


Electric Vehicle (EV) is one of the most preferred vehicles in the current era, as it causes less pollution in the environment when compared to conventional vehicles. The depleted batteries can be refueled using battery charging methods which are further classified as slow, fast and battery swapping methods. EVs wait in queues before they get into service due to long duration of its charging. Queuing theory is used to evaluate behavior of EV charging stations. In this paper, the main objective is to study the different queuing models (M/M) with finite system and infinite system capacity at Fast Charging Stations (FCS). Aspiration level model is used to determine the acceptable range for service. Such models alleviate the difficulty in estimating various costs associated with respect to charging stations. And hence plays a key role in designing battery charging stations in EV developing countries like India. The objective is to understand different queuing models associated with the EV charging station by considering the data of Beijing charging station for a particular private EV.

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2020

P. R. Shabarish, R. Krishna, P., Prasanth, B., Dr. K. Deepa, Manitha P. V., and V. Sailaja, “Fuzzy based Approach to Enhance the Wireless Charging System in Electric Vehicles”, 2020 4th International Conference on Electronics, Communication and Aerospace Technology (ICECA). IEEE, Coimbatore, India, 2020.[Abstract]


The infrastructure for electric vehicle (EV) charging is limited to the place and time. To facilitate the EV charging at parking lots and slow-moving traffic, the wireless charging system is proposed. An attempt has been made to transfer the power from a DC microgrid to the vehicle through the Wireless Power Transmission (WPT) system. The system involves single-stage inverter, inductive coupling, single-stage rectifier and boost converter to meet the rated voltage of the battery in EV. However, output voltage variations are predominant due to the change in battery impedance with the state of charge (SoC). Hence, a fuzzy logic controller is proposed to maintain the constant voltage across the load which is analysed in MATLAB/Simulink. The performance of the controller is evaluated with the Integral Square Error (IS E) and the dynamic response of the controller is evaluated by time-domain analysis.

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2020

B. S. T. Reddy, Reddy, K. S., Dr. K. Deepa, and K. Sireesha, “A FLC based Automated CC-CV Charging through SEPIC for EV using Fuel Cell”, 2020 International Conference on Recent Trends on Electronics, Information, Communication & Technology (RTEICT). 2020.[Abstract]


Energy extraction from renewable sources and its utilization in Electric Vehicles (EVs) have paved the way for greener transportation options. Battery charging is the present-day challenge in EVs. Constant Current (CC) and Constant Voltage (CV) charging methods have many advantages over other EV battery charging techniques. A fuel cell, being one of the ways of producing DC energy, can be directly used to charge batteries in EVs. With the fuel cell being the DC source, the on-board fast charging can be easily achieved by various power converters, but the Single-Ended Primary Inductor Converter (SEPIC) would serve most efficiently for the aforementioned scenario. In CC method, battery may overcharged if battery reaches full charge mode as current is constant and similarly in CV method in initial stages current drawn by battery is high which may cause temperature to rise to undesired values. To overcome these disadvantages the CC-CV charging can be switched according to the requirements using automated Fuzzy Logic Controller (FLC). The CC-CV charging of the EV battery using SEPIC with the help of a fuel cell through FLC has been proposed and simulated using MATLAB/Simulink software, and the results have been discussed.

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2019

R. George, Vaidyanathan, S., Rajput, A. Singh, and Dr. K. Deepa, “LiFi for Vehicle to Vehicle Communication – A Review”, Procedia Computer Science, vol. 165. pp. 25 - 31, 2019.[Abstract]


Light ​Fidelity, also known as LiFi, is a technology based on​ communication using ​light as a​ ​medium. This technology is known as Visible Light ​Communication ​(VLC) which removes the complexity of cable communication. LiFi has evolved over the past years and has been proven to be secure, efficient and can send data at very high rates. The proposed paper reviews the overall foundation of LiFi and studies the possibility of implementing LiFi in a communication system by explaining the architecture, the modulation techniques and its pros and cons. ​This paper also demonstrates a communication system in which data is sent from a transmitter to a receiver using light as a medium to control the speeds of two motors.

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2018

A. D. Nidhis, Pardhu, C. Naga Venka, K. Reddy, C., and Dr. K. Deepa, “Cluster Based Paddy Leaf Disease Detection, Classification and Diagnosis in Crop Health Monitoring Unit”, Computer Aided Intervention and Diagnostics in Clinical and Medical Images, vol. 31. Springer International Publishing, Cham, pp. 281-291, 2018.[Abstract]


Rice is the staple food in the southern parts of India. Its yield directly affects the economy of the state. Rice blast, brown spot, and bacterial blight are the major diseases that can be seen in the leaves of the paddy crop which also greatly affect their productivity. The farmers, with limited knowledge of the disease, add irrelevant pesticides in inappropriate quantities, which not only diminishes the quality of the crop but also leads to the degradation of the soil quality and other environmental degradations. The proposed method uses image processing techniques to detect what disease has affected the leaves and also calculate the severity of the infection by calculating the percentage of the affected area, which can be used in controlling the excessive use of pesticides. The above mentioned diseases are the predominant diseases occurring in paddy crops among other diseases that vastly affect the yield and in turn affect the economic income of the farmers.

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2018

V. Sailaja, Dr. K. Deepa, A., S., P., R. E., and S., R. G. K., “Implementation of One Cycle Control for a Standalone System”, International Conference on Trends in Electronics and Informatics, ICEI 2017. SCAD College of Engineering and Technology , Tirunelveli, India , 2018.[Abstract]


The converter used in this paper is Double Input Isolated Flyback Converter which is more efficient in multi input and multi output systems. The control method adopted in this paper is One Cycle Control. The feasibility of the converter with this control is checked. The circuit has been simulated in MATLAB software and analysis performed are presented.

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2017

P. P. Reddy, Suresh, P. V. B., Reddy, P. T., Manitha P. V., and Dr. K. Deepa, “Remote control of an electronic device using EOG”, 2017 International Conference On Smart Technologies For Smart Nation (SmartTechCon). IEEE, Bangalore, India, pp. 780-783, 2017.[Abstract]


Over 1 billion of the world population have some form of disability which corresponds to 15% of the world population. And this disability suppresses their ability to communicate with the physical world. The proposed prototype provides an opportunity for such people to be self-reliable and enhances the ability of the disabled people to operate the electrical and electronic devices remotely, without the assistance of fellow beings. This prototype aims at providing an eminent platform for disabled people to communicate with the physical world at an equitable price. Human eye is capable of producing a corneo-retinal potential whose magnitude varies from 0.4-1mV with a frequency ranging from 0-35 Hz. This is attributed to the high metabolic rate of retina. The proposed model exploits this appealing property of human eye. It encompasses the ECG electrodes to trap this potential and is fed as an input to the amplifier circuit. Further, the amplified signal is conditioned using a signal conditioning circuit to remove the noise creeping into the signal. This is wirelessly transmitted using an RF module to the receiver circuit and from there it is used to trigger the required circuit. A LED is triggered to ensure the functionality of the framework.

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2014

N. K., V. Sailaja, Dr. K. Deepa, and Manjunath, H. V., “A DC-DC multi output SEPIC converter for suburban power application”, International Conference on Electronics, Communication and Computational Engineering, ICECCE 2014. 2014.[Abstract]


Non conventional sources of energy are those which are depleting day by day. Solar energy which is abundant in India has gained more importance hence. The energy produced by the sun, is harnessed with the help of PV panels and injected to converters and rectifiers. It is subsequently fed to an inverter that produces an AC power. In this paper, a PV panel fed modified dual output SEPIC converter is proposed. Dual outputs obtained from the modified multi output SEPIC converter is used to charge two batteries which in turn are fed to the cascaded multilevel DC/AC inverter. The simulation analysis of the system proves that it is well suited for both resistive and inductive loads; hence it is proposed for driving a motor load in rural areas agricultural applications. This system can be deployed in areas where grid connection is not possible such as in isolated or rural areas.

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2013

Dr. K. Deepa, Mahalakshmi, R., ,, and M. Kumar, V., “Bi-directional push-pull converter fed four quadrant DC drive”, Emerging Trends in Communication, Control, Signal Processing & Computing Applications (C2SPCA), 2013 International Conference on. IEEE, Bangalore, pp. 1-6, 2013.[Abstract]


The DC-DC converter find a wide scope in industries, telecommunication sectors, power electronics area, etc.. Nowadays bi-directional converters have a higher end over them since the energy from the load during regenerative braking is fed back to the source, thus obtaining energy efficient system. In this paper a bi-directional push-pull DC-DC converter is proposed for a four quadrant DC drive application. A laboratory prototype of 5W bi-directional push-pull converter was designed, developed and realized and is presented in detail.

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Publication Type: Book Chapter

Year of Publication Title

2020

H. Priya U., P., J., S., P. V. V. S., Dr. K. Deepa, and Anjana Jain, “Energy Conservation Strategy for DC Motor Load Applications”, in Recent Trends and Advances in Artificial Intelligence and Internet of Things, V. E. Balas, Kumar, R., and Srivastava, R., Eds. Cham: Springer International Publishing, 2020, pp. 177–186.[Abstract]


DC Electric motors convert nearly half of the worldwide electric energy into mechanical energy. In many industrial applications DC motor finds a good place for variable speed and versatile operations due to its easy controllability. This paper deals with the energy conservation for a separately excited DC motor by applying speed control technique. The experimental setup is established for the system and speed control is carried out through variable armature input voltage using firing angle control.

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Publication Type: Book

Year of Publication Title

2005

Dr. K. Deepa, Zamrooth, D., and Porselvi, T., Electrical Machines, vol. 1. Scitech publications, 2005.

2003

Dr. K. Deepa, porselvi, porselvi, and sangeetha, tresa, Control Systems, vol. 1. Charulatha publications, 2003.

Funds Received

Year Award Title Details
2020 Prominent student branch chapter from IEEE PES Bangalore chapter 2020
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Received Rs.5000/-
2020 IEEE Bangalore Section Student Innovation Project fund (BS-SIP 2019) Call 3
Role:  Project Guide
Award money of Rs.5000/-, for the project tilted “Renewable Energy based battery charger for fisherman Boats” (BSSIP-2019-3). Student Member: Praneeth Varma, Amitasree, Niharika
2020 High performing student branch IEEE PES award – 2019.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Received $800 as high performing student branch IEEE PES award – 2019
2019 Best student branch chapter award from IEEE PES Bangalore chapter 2017.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Rs.5000/- ( Award was first introduced in the year 2017 and was bagged by Amrita school of Engineering IEEE PES & IAS Student branch chapter)
2019 High performing student branch IEEE PES award – 2018.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Received $500 as high performing student branch IEEE PES award – 2018, 5th in World ranking, Second in India.
2018 CMD Most happening Chapter – for 2018 calendar year.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Second in the World Ranking of IEEE IAS
2018 High performing student branch IEEE PES award – 2017.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Received $300 as high performing student branch IEEE PES award – 2017, 5th in World ranking, Second in India, 3rd in Region 10 – Asia Pacific.
2017 High performing student branch IEEE PES award – 2016.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Received $401 as high performing student branch IEEE PES award – 2016, 6th in World ranking, First in India and Region 10 – Asia Pacific.
2017 IEEE IAS CMD Chapter Web Contest – for 2017 calendar year. 
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Award of $700 for 2nd prize in IEEE IAS CMD Chapter Web Contest 
2017 CMD Outstanding Chapter Contest – for 2017 calendar year.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Award of $850 for winning IEEE IAS CMD outstanding joint Chapter award 
2016 High performing student branch IEEE PES award – 2015.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Received $295 as high performing student branch IEEE PES award - 2015 , 19th in world ranking, 6th in R10, 3rd in India.
2015 IEEE PES student Branch Chapter in Amrita School of Engineering startup fund
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Initiated IEEE PES student Branch Chapter in Amrita School of Engineering and received a startup fund of $120.
2015 IEEE PES & & IAS Joint student Branch Chapter startup fund of $500.
Role:  IEEE –PES & IAS Jt student Chapter Advisor
Initiated IEEE PES & IAS Joint student Branch Chapter in Amrita School of Engineering and received a startup fund of $500.
2013-2014 B.Tech student Project titled “Grid connected photovoltaic system”
Role:  Project Guide
Funded Rs 4,500 by Karnataka state council for science and technology, Bangalore, 37th series of student project’s program (SPP), 2013 -2014, Reference no   :- 37S1015.

Keynote Delivered

  • Dr. K. Deepa was invited to deliver a key note address on "Battery Management System in Electric Vehicles", for IEEE technically sponsored first international conference on power, energy, control and transmission systems 2018 organized by Department of EEE at Sri Sairam Engineering College, Tambaram, Chennai on 23rd February 2018. And also she chaired a session in the conference.

PhD Students

Name of the Student Registration Number / Year of Registration/ Part Time or Full Time Tile of Research Status of Research
Anjana Jain BL.EN.D*EEE14001/ 2014 / Part Time Design of Non-linear Controller for Voltage and Frequency Control of Permanent Magnet Synchronous Generator Based Variable Speed Standalone Wind Energy Conversion System Viva Voice Successfully Completed (October 2020)
Thiruvonasundari. D BL.EN.D*EEE16007/ 2016 / Part Time Optimal cell balancing mechanism for electric vehicle Proposal defense completed
Deepti. T BL.EN.R4EEE17001/ July 2017/ Full Time Design and Analysis of a Novel Bidirectional Converter for Electric Vehicle Application Comprehensive Viva Completed.
Reshma P Eldho BL.EN.R4.EEE190001 July 2019/ part time Resonant converters for electric vehicle battery chargers Course work ongoing
Priyanka Priyadarshini Padhi BL.EN.R4.EEE190006 July 2019/ part time Operation and control of DC microgrid Course work ongoing
D Kodandapani BL.EN.R4.EEE19010/ February 2020/ Part time. Common Mode Voltage Mitigation Techniques in Electric Vehicle Neutral-Point-Clamped Inverter fed permanent magnet synchronous motor drive system. Course work ongoing.
Mohana Latha P BL.EN.R4EEE20009 August 2020/Full time An Efficient Regenerative Braking System using Hybrid Energy Storage System with Frictional and Regenerative Braking Integration Course work ongoing

Research Grants Received

Year

Funding Agency

Title of the Project

Investigators

Status

2013 -2014

Karnataka state council for science and technology, Bangalore, 37th series of student project’s program (SPP), Reference no :- 37S1015

“Grid connected photovoltaic system”

Dr.K.Deepa

Completed , Received Rs 4,500

Keynote Addresses/Invited Talks/Panel Memberships

  • Dr. K. Deepa delivered a key note address on "Battery Management System in Electric Vehicles", for IEEE technically sponsored first international conference on power, energy, control and transmission systems 2018 organized by Department of EEE at Sri Sairam Engineering College, Tambaram, Chennai on 23rd February 2018. And also she chaired a session in the conference.
  • Delivered a talk in two session on 9-01-2019 Fore noon in the topic “Energy Storage systems used in Electric Vehicles” and “Battery Modelling and Management” at Department of Electrical and Electronics Engineering, Mar Baselios College Of Engineering And Technology, Thiruvananthapuram for Short Term Training Programme On “E-Vehicle: A Green Approach for Sustainable Development”- EV-GASD’19, sponsored by KSCSTE & EMC during 07/01/2019 to 11/01/2019
  • Delivered a Webinar in the topic “Role of Electrical Engineers in design and development of Electric Vehicles” on June 22 for Faculty of Engineering and Technology, Jain (Deemed-to-be University),Bengaluru
  • Delivered a Webinar in the topic “Introduction to Electric Vehicle” on 30-5-20 for 2 Weeks Online Refresher Course for faculty members on Electrical, Electronics, Instrumentation, Automation and Teaching Methodology from 18th May to 30th May 2020 at Sri Sairam Engineering College,Chennai-44
  • Delivered a Webinar in the topic “Beginners Guide to Electric Vehicle” on 20-6-20 for Dept. of Electrical, Electronics Engineering, Oxford Engineering college, Bangalore

Courses Taught

  • Power Electronics for Electric Vehicle Applications
  • Smart Grid
  • Renewable Energy and Energy Conservation
  • Power Converters
  • Power Electronics,
  • Power Quality
  • Digital Systems
  • Research Methodology
  • Control Systems,
  • Signal & Systems,
  • Digital signal Processing,
  • Network Analysis,
  • Electrical Machines,
  • Solid State Drives,
  • Modern Control Theory,
  • Measurement and Instrumentation,
  • Basic Electrical Engineering

Student Guidance

Undergraduate Students

Sl. No.

Name of the Student(s)

Topic

Status – Ongoing/Completed

Year of Completion

1

Bathala Prasanth , Batta Sanju Srivasthav, Yangalreddygari Sai Sreenivasa Reddy

 An Efficient Regenerative Braking System Based On Supercapacitor For Electric Vehicles With BLDC Motor

Completed

2020

2

R Sripradha

Digital Image And Audio Watermarking

Completed

2020

3

Rahul George,

Srikumar Vaidyanathan

Estimation of SoC and nearest Charging Station

locator for Electric Vehicles

Completed

2019

4

 CH.NV.Pardhu,

K.Charishma Reddy ,

Nidhis A D

Smart Crop Health Monitoring Unit

Completed

2018

5

B. Vijaya Bhargava

Making a standalone gear shift indicator using OBD-2 (BOSCH) protocol

Completed

2017

6

AB Abhinav, Fayaz Baig, P Mohit

Energy efficient battery charging in Electric Vehicle with Solar Panels

Completed

2017

7

N Muhammad Ibrahim, Venkat Gangadhar, Partho Mazumdar

Implementation of SEPIC-WEINBEG Converter

Completed

2016

8

Aneesh A., C. Bhaskar Reddy, G. Karthik

Integrated 3 port dc dc converter for hybrid pv/fc/battery backup

Completed

2015

9

Antara Bhattacharya, P. Nandhini, S. Hareesh

Grid Connected Photo Volaic System

Completed

2014

10

Parvathy.R, Rajeshwari.K, Sri Govind.K.R

Constant Frequency Quasi Resonant zero Voltage Switching Multioutput Flyback Converter

Completed

2011

11

Ashwinin B. R, Deepika S., Diana D’Souza, Shilpa K.

Cascaded H Bridge Inverter for Electric Vehicles

Completed

2010

12

Ashwini Mary Job, Deepika Padiyar, Kishore S. Ahmed, Vaishakh Venkat

Web Enabled Remote monitoring of Patient Parameters using Body Area networks

Completed

2010

13

Manitosh Shekar, Pallavi, Prajwal Prem, Priya Das

PLC based control panel used for aero engine testing (ABB)

Completed

2007

14

Srinath S, Karthik S. Narayanan, Avinash

Industrial Force Measurement with real time data acquisition system

Completed

2006

Postgraduate Students

Sl. No.

Name of the Student(s)

Topic

Status – Ongoing/Completed

Year of Completion

1

Dinesh Pradiprao Patil

An Adaptable Control Strategy For EV To Achieve A Flat Demand Curve With PI And Fuzzy Logic Control

Ongoing

2021

2

Abhishek Saxena

Electric Vehicle Charging Using DC Micro-Grid

Completed

2019

3

Sweya Sasikumar

Dynamic EV Charging for Slow Moving Traffic Applications

Completed

2018

4

Prasanna Kumar

Mitigation of Power Quality problems in micro grids using PV integrated UPQC

Completed

2017

5

Abishek Yadav

PV array based heric inverter topology for irrigation pump

Completed

2016

6

Sri Lakshmi

Boost Dc Dc converter topology with soft switching under varying load conditions

Completed

2015

7

Anuvinda V

Multi output flexible converter with two selectable topologies

Completed

2015

8

Parvathy Nair

Two input port converter with flyback inverter for rural lighting applications

Completed

2015

9

Athira S.

Solar powered multi output half bridge converter fed resonant inverter

Completed

2014

10

Lakshmypriya

Design and development of 100KHz high voltage power supply for travelling waytube (ISRO)

Completed

2014

11

Bijitha

ZVS multi output flyback conveter

Completed

2014

12

Sanitha Mary Kurien

Implementation of active clamp zero voltage switching multi output flyback converter

Completed

2013

13

Padmaja P J

Implementation of Push Pull Conveter with post regulator for aerospace applicatons

Completed

2013

14

Ajith Vijayan

Soft switching scheme for post regulated current fed push pull converter

Completed

2013

15

Hridaya Mary Saju

Multi output ZVS PWM flyback converter with a simple auxiliary switch

Completed

2013

16

Deepthi T.

Implementation of multi output converter with post regulator

Completed

2012

17

John Marshal

Maximum Utilization of Distributed Energy Generators using DST controller`

Completed

2012

18

Shivaprasad

Unity Power Factor Battery Charger for EV application (IISc)

Completed

2012

19

Sharika M.

Implementation of a push pull zero voltage switching quasi resonant converter fed DC drive.

Completed

2012

Research Scholars

Sl. No.

Name of the Student(s)

Topic

Status – Ongoing/Completed

Year of Joining / Year of Completion

1.

Anjana Jain (BL.EN.D*EEE14001/ 2014 / Part Time)

Design of Non-linear Controller for Voltage and Frequency Control of Permanent Magnet Synchronous

Completed

Year of Completion October 2020

2.

Thiruvonasundari. D (BL.EN.D*EEE16007/Part Time)

Optimal cell balancing mechanism for electric vehicle

Ongoing (Proposal defense completed)

Year of Joining :2016

3.

Deepti. T (BL.EN.R4EEE17001/Full Time)

Design and Analysis of a Novel Bidirectional Converter for Electric Vehicle Application

Ongoing (Comprehensive Viva Completed.)

July 2017

4.

Reshma P Eldho (BL.EN.R4.EEE190001/ part time)

Resonant converters for electric vehicle battery chargers

Ongoing (Course work completed)

July 2019

5.

Priyanka Priyadarshini Padhi (BL.EN.R4.EEE190006/ part time)

Operation and control of DC microgrid

Ongoing (Course work completed)

July 2019

6.

D Kodandapani (BL.EN.R4.EEE19010/ Part time.)

Common Mode Voltage Mitigation Techniques in Electric Vehicle Neutral-Point-Clamped Inverter fed permanent magnet synchronous motor drive system.

Ongoing (Course work completed).

February 2020

7.

Mohana Latha P(BL.EN.R4EEE20009 /Full time)

An Efficient Regenerative Braking System using Hybrid Energy Storage System with Frictional and Regenerative Braking Integration

Course work ongoing

August 2020