Flux modulation permanent-magnet machines (FMPMs) operate on the magnetic gearing effect and thus can produce large torque at low rotation speed. However, the most significant drawback of many FMPMs is the low power factor. In order to further improve the torque density and power factor, this article proposes an advanced FMPM with permanent magnets (PMs) on both stator and rotor. In this article, the configuration and operation principle of the proposed machine will be introduced. Moreover, this article will also investigate the torque and power factor performances of the proposed machine under different rotor slot numbers. Then, to verify the superiority of the proposed FMPM, it is compared with a regular stator-PM FMPM and a regular rotor-PM FMPM in terms of cogging torque, back-electromagnetic force, rated torque, torque ripple, power factor, overload capability, flux weakening capability, and efficiency. Finally, a prototype of the proposed FMPM is tested, and the experimental results have verified the theoretical analyses.

中文翻译：

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定子和转子上都带有永磁体的磁通调制机的合成

磁通调制永磁电机（FMPM）发挥磁齿轮效应，因此可以在低转速下产生大扭矩。但是，许多FMPM的最大缺点是功率因数低。为了进一步提高转矩密度和功率因数，本文提出了一种在定子和转子上均带有永磁体（PM）的先进FMPM。在本文中，将介绍所提议机器的配置和操作原理。此外，本文还将研究在不同转子槽数下所提出的电机的扭矩和功率因数性能。然后，为了验证所提出的FMPM的优越性，将其与齿槽转矩，反电磁力，额定转矩，转矩脉动，功率因数，常规定子-PM FMPM和常规转子-PM FMPM进行比较，过载能力，弱磁通能力和效率。最后，对提出的FMPM的原型进行了测试，实验结果验证了理论分析。