Comparative Study of Air-Gap Field Modulation in Flux Reversal and Vernier Permanent Magnet Machines
Comparative Study of Air-Gap Field Modulation in Flux Reversal and Vernier Permanent Magnet Machines
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DOI：
10.1109/tmag.2018.2837898
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发表时间：
2018-06
影响因子：
2.1
通讯作者：
Huayang Li;Y. Liu;Z. Zhu
中科院分区：
文献类型：
--
作者：
Huayang Li;Y. Liu;Z. Zhu
本文对基于气隙磁场调制的磁通反转永磁（FRPM）电机和游标永磁（PM）电机的扭矩产生机制进行了分析和比较。对两台电机中 PM 磁动势 (MMF) 和气隙磁导的工作谐波进行了分析识别和比较，表明基本 PM MMF 与所有磁导谐波一起贡献了 Vernier 电机的扭矩产生，而所有 PM MMF 谐波但只有 FRPM 电机中的基波磁导产生扭矩。由于采用了气隙磁导的大直流分量，游标机的扭矩密度表现得更好。还研究了 PM 厚度和调制极槽宽比等关键参数对机器性能的影响。这表明FRPM机器对设计参数更加敏感。通过有限元分析和实验验证来验证结论。
In this paper, the torque production mechanisms of flux-reversal permanent magnet (FRPM) machine and Vernier permanent magnet (PM) machine are analyzed and compared based on air-gap field modulation. Working harmonics of PM magnetomotive force (MMF) and air-gap permeance in two machines are analytically identified and compared, indicating that the fundamental PM MMF together with all permeance harmonics contribute to the torque production of Vernier machine whereas all PM MMF harmonics but only fundamental permeance in FRPM machine produces the torque. Thanks to the utilized large dc component of air-gap permeance, the torque density of Vernier machine is revealed to be better. Influence of critical parameters on machine performance, such as PM thickness and slot width ratio of the modulation pole, is also investigated. It shows that FRPM machine is more sensitive to the design parameters. Both finite-element analysis and experimental validation are conducted to verify the conclusion.