CJEE

Chinese Journal of Electrical Engineering ›› 2024, Vol. 10 ›› Issue (1): 124-135.doi: 10.23919/CJEE.2024.000049

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FEA-based Geometrical Modification of Switched Reluctance Motor for Radial Force Reduction

Rani S, Jayapragash R*   

  1. School of Electrical Engineering, Vellore Institute of Technology, Chennai 600 127, India
  • Received:2023-03-06 Revised:2023-09-11 Accepted:2023-09-27 Online:2024-03-25 Published:2024-04-10
  • Contact: * E-mail: jayapragashr@vit.ac.in
  • About author:Rani S (IEEE Member) has a Bachelor's degree in Electrical Engineering (AMIE) from the Institution of Engineers, India (2009). She graduated from Visveswaraya Technological University, Belgaum, with a Master's degree in Computer Applications in Industrial Drives (2012). She worked as an Assistant Professor in the Electrical and Electronic Engineering Department at MEA Engineering College, Kerala, India. She is a Ph.D. candidate at the School of Electrical Engineering, Vellore Institute of Technology, Chennai, India. Powertrain designs for EVs, power electronics, and special machines are some of the areas of interests.
    Jayapragash R obtained his Bachelor's degree in Electrical Engineering (AMIE) from the Institute of Engineers, India (2004). He obtained his Master's degree in Power Electronics and Driving from Anna University in 2007. He received his Ph.D. from Anna University, Chennai for the Thesis titled “Development of analytical models and battery energy storage system for wind-powered switched reluctance generators”. He has more than 7 years of work experience in the industry and 15 years of experience in the academic field. He is currently an Associate Professor in the School of Electrical Engineering at Vellore Institute of Technology Chennai, India. His research areas include machine design, battery management systems, and converter design for battery charging.

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Abstract: Switched reluctance motors (SRMs) are becoming increasingly popular in the automotive sector owing to their robust design. Moreover, SRMs are preferred particularly for EV applications owing to their fault tolerance, magnet-free structure, and high power/torque density. The main concerns of SRM compared to other machines include torque ripple and vibration. The primary cause of vibration is the radial force created by the SRM. A geometry-based modification of the SRM to reduce the radial force without significantly changing the average torque produced is proposed. The primary goal is to design a 4-phase, 8/6 SRM with a lower radial force. Two possible geometrical alterations are proposed: one with square windows and the other with circular holes on the rotor core. The windows are sized and positioned to avoid flux saturation. General criteria are developed for the optimal window size and placement. Finite element analysis (FEA) modelling of the SRM is used to validate its performance. The FEA results are compared with the performance parameters obtained using the analytical method. Utilizes the multiphysics design tool ANSYS to obtain the natural frequencies and associated deformations through modal analysis. Compared to the conventional geometry, the radial force is significantly reduced by providing windows.

Key words: 8/6 SRM, radial force, modal analysis, FEA analysis, natural frequencies, SRM with windows