Publication

Abstract : In recent years, electric vehicles have gained popularity due to the demand for energy efficiency, power autonomy, reduced greenhouse gas emissions, and declining fossil fuel reserves. Similarly, the aviation industry is focussing on the design of specialized electric machines to propel the engine at high speed without bearings shifting focus to All Electric Aircraft (AEA) and More Electric Aircraft (MEA) applications by extensively utilizing electrical energy, reducing the size and meeting energy conservation aspect attracting global attention and Sustainable Development Goal (SDG-7). This work proposes the design and development of a 5 kW, 270 V (MIL-STD-407), 50,000 rpm High-Speed Permanent Magnet Starter/Generator (HSPMSG) of high-power density, compact size to propel an engine without a bearing for MEA applications. The study details optimal design, modeling using Finite Element Analysis (FEA) computation, material selection for the machine, and targeting high-speed operation with reduced weight. The proposed HSPMSG replaces two separate machine operations, namely the motor and generator, with a single machine as a Starter-Generator. During the operation, motoring mode, including idling of the engine to 75% of the rated speed the machine is subjected to deliver power at constant torque and shifts to generating mode between 75–100% of the rated speed. Simulation results demonstrate stable and efficient operation in both motoring and generating mode which is carried out computationally and validated using Ansys Maxwell – Motor CAD. The optimal design and selection of the HSPMSG machine by applying Virtual Work (VW) and Co-energy Electromagnetic (CE) computational technique using an E-Magnetic approach by performing FEA has achieved high power density, highly efficient and compact model of high-power density, improved power-to-weight ratio machine well-suited for MEA.