中国电气工程学报（英文） ›› 2024, Vol. 10 ›› Issue (2): 59-69.doi: 10.23919/CJEE.2024.000063

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  • 收稿日期:2023-12-15 修回日期:2024-01-17 接受日期:2024-01-29 出版日期:2024-06-25 发布日期:2024-07-01

Investigation of Eccentric PM on High-frequency Vibration in FSCW PM Machine Considering Force Modulation Effect*

Jinghua Ji, Weizhi Jiang, Wenxiang Zhao*, Tong Liu   

  1. School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2023-12-15 Revised:2024-01-17 Accepted:2024-01-29 Online:2024-06-25 Published:2024-07-01
  • Contact: * E-mail: zwx@ujs.edu.cn
  • About author:Jinghua Ji received the B.Sc., M.Sc., and Ph.D. degrees in Electrical Engineering from Jiangsu University, Zhenjiang, China, in 2000, 2003, and 2009, respectively.
    Since 2000, she has been with the School of Electrical and Information Engineering, Jiangsu University, where she is currently a Professor. From 2013 to 2014, she was a Visiting Scholar with the Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, UK. She has authored or coauthored over 50 technical papers in these areas. Her research interests include electrical machines and motor drives.
    Weizhi Jiang received the B.Sc. degree in Electrical Engineering from Southeast University Cheng Xian College, Nanjing, China, in 2021. He is currently working toward the M.Sc. degree in Electrical Engineering at Jiangsu University.
    His current research interests include electromagnetic design and vibration calculation of PMSM systems.
    Wenxiang Zhao (M’08-SM’14) received the B.Sc. and M.Sc. degrees in Electrical Engineering from Jiangsu University, Zhenjiang, China, in 1999 and 2003, respectively, and the Ph.D. degree in Electrical Engineering from Southeast University, Nanjing, China, in 2010.
    From 2008 to 2009, he was a Research Assistant with the Department of Electrical and Electronic Engineering, University of Hong Kong, Hong Kong, China. From 2013 to 2014, he was a Visiting Professor with the Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, UK. Currently, he is a Professor with the School of Electric Power Engineering, Nanjing Institute of Technology, and also with School of Electrical and Information Engineering, Jiangsu University. He has authored and coauthored over 150 papers published in various IEEE TRANSACTIONS. His current research interests include electric machines and control.
    Tong Liu received the B.Sc. degree in Electrical Engineering from Jiangsu University, Zhenjiang, China, in 2018. He is currently working toward the Ph.D. degree in Electrical Engineering at Jiangsu University.
    His current research interests include modeling and calculation of electromagnetic force, vibration, and acoustic noise of PMSM systems.
  • Supported by:
    *National Natural Science Foundation of China under Projects 52377055 and 51991383.

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Abstract: This study investigates the negative influence of an eccentric permanent-magnet (PM) design on high-frequency electromagnetic vibration in fractional-slot concentrated-winding (FSCW) PM machines. First, an analytical expression for the sideband current harmonics was derived using the double Fourier series expansion method. Then, the characteristics of the flux-density harmonics are studied from the perspective of the space-time distribution and initial phase relationship. The influence of the eccentric PM design on high-frequency electromagnetic and concentrated forces was studied based on the electromagnetic force modulation effect. Consequently, an eccentric PM design is not conducive to reducing the 2pth-order high-frequency electromagnetic forces. Finally, two FSCW PM machines with conventional and eccentric PM designs are manufactured and tested to verify the theoretical analysis. The results show that the eccentric PM design worsens high-frequency vibrations.

Key words: Eccentric permanent magnet machine, sideband current harmonics, electromagnetic force modulation effect, fractional-slot concentrated-winding, high-frequency vibration