This article proposes a novel hybrid rotor permanent magnet (HRPM) machine for the performance of torque and overload capability with the constraint of the rotor diameter. In order to optimize the electromagnetic performance, an analytical model (AM) is built by the magnetic equivalent circuit (MEC) of the rotor and stator considering the saturation and leakage flux effect. A good prediction accuracy is verified by the finite element method (FEM), even in high saturation condition. Based on the AM, the characteristics of the hybrid magnetic pole rotor are analyzed by the equivalent strategy that equivalent PM remanence and thickness of single pole in rotor. Furthermore, a response surface method (RSM) for multi-variate and multi-objective optimization is adapted to improve the electromagnetic performance because of the high torque density and PM material utilization. Finally, a comparison of the torque, PM eddy current loss and anti-demagnetization performance is investigated among surface-mount PM (SPM) machine, spoke-type PM (STPM) machine and HRPM machine. The comparison results show the hybrid PM rotor machine enhances higher torque density and overload capability. Finally, a 12 slot/10 pole HRPM machine is prototyped and tested to validate the analyses.

中文翻译：

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新型高转矩密度混合转子机的分析模型与优化

本文提出了一种新颖的混合转子永磁体（HRPM）机器，该机器具有受转子直径限制的扭矩和过载能力。为了优化电磁性能，考虑饱和和漏磁通效应，通过转子和定子的磁等效电路（MEC）建立分析模型（AM）。即使在高饱和条件下，也通过有限元方法（FEM）验证了良好的预测精度。在此基础上，通过等效磁极剩磁和转子单极厚度等效策略，分析了混合磁极转子的特性。此外，由于高扭矩密度和PM材料利用率，适用于多变量和多目标优化的响应面方法（RSM）可以改善电磁性能。最后，比较了表面贴装式（SPM）机，轮辐式（STPM）机和HRPM机的转矩，永磁涡流损耗和抗退磁性能。比较结果表明，混合式永磁转子电机具有更高的转矩密度和过载能力。最后，对12槽/ 10极HRPM机器进行了原型设计和测试，以验证分析结果。比较结果表明，混合式永磁转子电机具有更高的转矩密度和过载能力。最后，对12槽/ 10极HRPM机器进行了原型设计和测试，以验证分析结果。比较结果表明，混合式永磁转子电机具有更高的转矩密度和过载能力。最后，对12槽/ 10极HRPM机器进行了原型设计和测试，以验证分析结果。