Qualification: 
M.Tech, BE
s_sampathkumar@cb.amrita.edu

Sampath Kumar S. currently serves as Assistant Professor (Sr. Gr.) at the Department of Electrical and Electronics Engineering, School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore Campus. His areas of research include Electric Drives, Soft Computing and Big Data Analysis.

Publications

Publication Type: Conference Proceedings

Year of Publication Title

2020

G. Vinayramsatish, Dr. Vijaya Chandrakala K. R. M., and Sampath Kumar S., “Standalone Solar Photovoltaic Fed Automatic Voltage Regulator for Voltage Control of Synchronous Generator”, Soft Computing for Problem Solving, vol. 1048. Springer Singapore, Singapore, pp. 991-1001, 2020.[Abstract]


The aim of this paper is to model standalone solar PV fed Automatic Voltage Regulator (AVR) for controlling the synchronous machine output voltage. The objective of AVR is to sense the output voltage of synchronous machine, alters the field current fed with DC supply and maintain the output terminal voltage constant when load changes. Normally, the DC voltage is given from an additional DC source to the field of the synchronous generator. As solar power is cost free fuel energy; in this work solar power is used to change the field excitation of synchronous machine and excess output power from solar is fed to battery to maintain power balance. Perturb and Observe (P&O) method is used to extract maximum power from solar PV cell through boost converter and buck converter is used to regulate the field current across the generator. The performance of the solar fed AVR to the synchronous machine connected to load is developed and analyzed using MATLAB/Simulink.

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2014

Dr. Balamurugan S., R Joseph Xavier, A Ebenezer Jeyakumar, and Sampath Kumar S., “Comparison of Hysteresis Comparator for the Performance Improvement of Direct Torque Controlled Induction Motor Drive”, Second National Conference on Power Electronics in Sustainable Energy Development (NCPSE - 2014) . Amrita School of Engineering, Coimbatore, 2014.

2007

Sampath Kumar S. and Kumar, S. S., “Fuzzy Logic Based Sensorless Direct Torque Control Of Induction Motor Drive”, National Conference on Power Electronics and Intelligence control. Malaviya National Institute of Technology-Jaipur, pp. 139-145, 2007.

Publication Type: Journal Article

Year of Publication Title

2018

Sampath Kumar S., R. Joseph Xavier, and Dr. Balamurugan S., “Development of ANFIS based reference flux estimator and FGS tuned speed controller”, Automatika, vol. 59, pp. 11-23, 2018.[Abstract]


ABSTRACTThis paper discusses about self-regulating the reference flux in induction motor (IM) direct torque control (DTC) drive by fuzzy logic. Self-regulation is improved by using “Artificial Neural Network (ANN)” and “Adaptive Network Based Fuzzy Inference System (ANFIS)” based reference flux estimators. Furthermore, PI speed controller is investigated to develop the performance of the drive. Two different PI speed controller tuning strategies, manual and Fuzzy Gain Scheduling (FGS), are compared for load torque disturbance. The results clearly show that the modified DTC of IM with “ANFIS-based reference flux estimator and FGS-tuned PI speed controller” is most suitable for torque ripple reduction and speed control.

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2016

Sampath Kumar S., R. Joseph Xavier, and Dr. Balamurugan S., “Speed Control of DTC with Torque Ripple and Flux Droop Reduction Using Sector Alteration based Adaptive Sliding Mode Control”, Asian Journal of Information Technology, vol. 15 , no. 20 , pp. 4020-4029, 2016.[Abstract]


In this study, an adaptive sliding mode speed controller is Developed for Direct torque Control (DTC) of induction motor drive in accordance with sector alteration strategy. In basic DTC system, the applied voltage vectors are not active during switching sector transition and stator flux drooping occurs at every sector transition. The original sector division is altered slightly to overcome this flux drooping. The Sliding Mode Controller (SMC) developed in this research incorporates adaptive switching gain based on fuzzy logic. The control law of adaptive sliding gain SMC considers the sector alteration in the DTC drive system also. The performance improvement of the developed sector alteration strategy and fuzzy SMC for DTC are verified using performance indices.

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2016

S. Manoj Krishna, Avinash R K, Rahul Vijayakumar, and Sampath Kumar S., “Fuzzy Controller for V/f control of Induction Machine”, Pakistan Journal of Biotechnology, vol. 13, pp. 523-527, 2016.

2016

V. Vennila, Reniflal Ebenezer, and Sampath Kumar S., “A User-friendly Presentation System”, International Journal of Control Theory and Applications, vol. 9, pp. 7931-7937, 2016.[Abstract]


Over the years, teaching methodologies have developed from white chalk board to projectors to smart online teaching now. All the practices except projectors involve direct contact with board. In a typical presentation, a presenter has to depend on an operator to control the functionalities of a mouse. And in a worse situation where he has to operate all by himself, he is compelled to interact with a computer more than the audience. This paper aims at developing a handheld laser device incorporated with buttons for left and right clicks to emulate the working of a mouse. A camera captures the image of projected screen continuously. Through Digital Image Processing (DIP), the location of laser is analyzed along with the clicks and this information is communicated to the PC to operate. This project also aims towards the advancement of projector usage by correcting keystone automatically and the tasks of remote control are achieved by commands given by user through keyboard interface. Thus, the remote to control projector can be excluded.

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2015

Anand Babu, Anupama R. Krishnan, Arvind D., Naveen S., N. Kumar, P., and Sampath Kumar S., “Genetic Algorithm Based Speed Control of Three Phase Induction Motor”, International journal of applied engineering research, vol. 10, 2015.

2015

Syam Vishnu and Sampath Kumar S., “Closed loop V/F speed control of induction motor using a cascaded three level inverter”, International Journal of Applied Engineering Research, vol. 10, pp. 35405-35409, 2015.[Abstract]


This paper focuses on implementing the closed loop speed control of an induction motor using V/f method. A cascaded multilevel inverter is used to energise the stator windings of the three phase induction motor. The switching scheme used with the switching devices of the cascaded multilevel inverter is carrier phase shifted PWM. The switching methodology is similar to the unipolar switching technique. The simulation of the system is done in MATLAB/Simulink® platform. The results obtained for variations in load are presented. The areas in which there is scope for improvement are also mentioned. © Research India Publications.

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2015

Sampath Kumar S. and Dr. Balamurugan S., “Sensor less Direct Torque Controlled Induction Motor Drive with Torque, Flux and Speed Ripple Minimization”, International Journal of Applied Engineering Research, vol. 10, no. 55, pp. 3547-3551, 2015.[Abstract]


In this paper, self-regulation of stator flux in Direct Torque Control (DTC) of Induction Motor Drive is achieved. Direct torque control is based on torque, flux hysteresis controllers and the stator flux angle. Based on hysteresis controllers and stator flux angle a look up table is constructed. In DTC Stator flux is divided as six sectors. Due to look up table uneven voltage vectors are distributed to control the stator flux and torque in a DTC induction machine. The stator flux magnitude droops at every switching sector transition, particularly when the machine is running at low speed with a heavy load. To overcome this sectors are slightly wavered for some angle. The performance of the controllers are investigated for load torque disturbance using Performance Indices ISE, ITAE and ITSE. The results clearly shows sector oscillation improves the performance to further reduce the torque ripple saw tooth sector wavering is used. © Research India Publications.

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Publication Type: Conference Paper

Year of Publication Title

2011

Prabu T., Sampath Kumar S., and R. Gunabalan, “Advanced direct torque control of induction motor”, in Proceedings of 2011 International Conference on Process Automation, Control and Computing, PACC 2011, Coimbatore, 2011.[Abstract]


Recent development in power electronics and soft computing techniques made it possible to design and implement the sophisticated control strategies of AC motor drives. In this paper the Direct Torque Control (DTC) which is one of the most excellent control strategies of ac motors which give very good steady and dynamic response is simulated. The current research directed towards the improving the performance of this technique whose main drawbacks like the ripples on the torque, on the flux and on the stator current. To reduce the torque ripple, twelve sector DTC is proposed instead of the six sector classical DTC. Also the Luenberger observer is used to estimate the rotor speed and rotor flux. Simulation results are presented to prove the effectiveness of twelve sector DTC. © 2011 IEEE.

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2007

Sampath Kumar S. and S. Senthil Kumar, “Flux and Torque Ripple Reduction in SVPWM based Direct Torque Control for Induction Motor Drive”, in National Conference on Power Systems and Power Electronics, St.Joseph College of Engineeering,,Chennai, 2007.

2007

S. Senthil Kumar and Sampath Kumar S., “Reduction of Ripples and Flux Droop inSensorless Direct Torque Controlled Induction Motor Drive”, in National Conference on Power Electronics and Intelligence control, Malaviya National Institute of Technology-Jaipur, 2007.

2007

Sampath Kumar S., “Control of flux droop and ripples in sensorless Direct Torque Controlled Induction Motor Drive without Comparator”, in International Conference 3CI-2007, R.V. College of Engineering, Bangalore , 2007.

Faculty Research Interest: