A Novel Flux-Reversal Permanent Magnet Machine with Low Torque Ripple Characteristic

Jing Miao, Xiaolian Li, Libing Jing () and Yuting Gao ()
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Jing Miao: College of Physics and Information Engineering, Cangzhou Normal University, Cangzhou 213000, China
Xiaolian Li: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443005, China
Libing Jing: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443005, China
Yuting Gao: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China

Energies, 2025, vol. 18, issue 18, 1-12

Abstract: The flux-reversal permanent magnet machine (FRPMM) exhibits superior energy conversion efficiency, enhanced fault resilience, and structural simplicity. It demonstrates excellent adaptability across variable speed conditions. Nevertheless, high torque ripple remains a primary constraint on the application prospects of FRPMMs. A novel FRPMM with concave stator poles and auxiliary teeth is proposed to address this issue. Sensitivity analysis is carried out, and the dominant parameters affecting the electromechanical characteristics of the machine are determined to be the rotor tooth radian, the permanent magnet tooth radian, and the auxiliary tooth width. Furthermore, the response surface method (RSM) is utilized in conjunction with a multi-objective genetic algorithm (MOGA) to optimize the parameters. Finally, a comparative analysis of electromagnetic characteristics between the proposed FRPMM and a conventional FRPMM is conducted. The results show that the proposed FRPMM can reduce torque ripple, improve output torque, and reduce the amount of permanent magnet.

Keywords: FRPMM; torque; ripple; RSM; MOGA (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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