This article presents a novel doubly fed doubly salient permanent magnet machine (DFDSPMM) with armature windings wound around stator and rotor teeth. Compared with the conventional doubly salient permanent magnet machine (DSPMM), this machine locates an extra winding in the rotor slots as armature winding to fully use its rotor slot space, thus leading to an increase in the output torque. The structure and operational principle of the proposed machine are analyzed at first. Then, the feasible stator/rotor-pole number combinations are discussed. Furthermore, the electromagnetic characteristics of the investigated machines are predicted based on the 2-D finite element (FE) analysis. It shows that higher torque density and lower cogging torque can be achieved by the proposed DFDSPMMs with improved stator/rotor-pole number combinations. Moreover, the proposed DFDSPMMs are compared against a surface-mounted permanent magnet machine (SPMM) to reveal comprehensive performance. Finally, the prototype is built and tested to validate the 2-D FE predictions.

中文翻译：

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定子/转子极数组合不同的新型双馈双凸极永磁电机的比较研究

本文介绍了一种新颖的双馈双凸极永磁电机（DFDSPMM），其电枢绕组缠绕在定子和转子的齿上。与传统的双凸极永磁电机（DSPMM）相比，该电机在转子槽中放置了一个额外的绕组作为电枢绕组，以充分利用其转子槽空间，从而导致输出转矩增加。首先分析了所提出机器的结构和工作原理。然后，讨论了可行的定子/转子极数组合。此外，基于二维有限元（FE）分析来预测所研究机器的电磁特性。结果表明，提出的具有改进的定子/转子极数组合的DFDSPMM可以实现更高的转矩密度和更低的齿槽转矩。而且，将拟议的DFDSPMMs与表面安装的永磁电机（SPMM）进行比较，以揭示综合性能。最后，构建并测试了原型以验证二维有限元预测。