Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Analysis and research on magnetic modulation mechanism of axial field flux-switching composite machines

  • Rui Wang (School of Electrical Engineering, Nantong University) ;
  • Wei Zhang (School of Electrical Engineering, Nantong University) ;
  • Xiaobin Xu (School of Electrical Engineering, Nantong University) ;
  • Jianwei Zhao (School of Electrical Engineering, Nantong University)
  • Received : 2022.03.30
  • Accepted : 2022.11.28
  • Published : 2023.05.20
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Abstract

To improve the performance of low-speed large-torque direct drive systems in limited space, an axial field flux-switching composite machine (AFFSCM) is proposed in this paper. The AFFSCM is composed of an axial field flux-switching permanent magnet machine (AFFSPMM) and magnetic gear. Therefore, it has the advantages of a compact structure, a large power/torque density, and a wide speed regulation range. First, the topology and magnetic modulation mechanism of the AFFSCM are investigated in detail. Then, the harmonic components of the inner/outer air-gap flux density are analyzed before and after the regulation of the rotary magnetic modulation ring. Based on this, the coupling conditions of the inner/outer air-gap magnetic field are deduced. Then the AFFSCM is initially designed, a three-dimensional finite-element model of the AFFSCM is built, and the electromagnetic performances are analyzed by the finite-element method, including the flux density of the inner/outer air-gap, the speed, the static torque, etc. Next, the cogging torque of the AFFSPMM is analyzed and optimized based on the magnetic modulation mechanism to suppress the torque ripple of the AFFSCM. Finally, an 800 W prototype is constructed and related experiments are done to validate the AFFSCM.

Keywords

Acknowledgement

This work was supported by National Natural Science Foundation of China (NSFC): [Grant No. 51507087], and Natural Science Foundation of Jiangsu Province (NSFJP): [Grant No. BK20211332].

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