This paper proposes a novel flux reversal permanent magnet (FRPM) machine with asymmetric-stator-pole (ASP) configuration. Different from the conventional FRPM machine with uniform “NS-NS-NS” PM sequence, the proposed ASP-FRPM machine is characterized by a “NSN-S-NSN” magnet arrangement. Hence, the interpolar flux leakage is significantly reduced with the developed design, which can improve the torque capability. The machine topologies, features, and operating principle are introduced, respectively. A simplified magnetic circuit model is established to reveal the underlying flux leakage reduction mechanism of the ASP design, and the rotor pole number is analytically optimized as well. The design parameters are then globally optimized so as to improve the torque quality. In addition, the electromagnetic characteristics of the ASP- and conventional FRPM machines are compared. Finally, experiments have been carried out to validate the theoretical results.

中文翻译：

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新型非对称定子磁极磁通反转永磁电机的设计与分析

本文提出了一种具有非对称定子极 (ASP) 配置的新型磁通反向永磁 (FRPM) 电机。与具有统一“NS-NS-NS”PM 序列的传统 FRPM 电机不同，所提出的 ASP-FRPM 电机的特点是“NSN-S-NSN”磁铁排列。因此，经过开发的设计显着减少了极间磁通泄漏，从而提高了扭矩能力。分别介绍了机器拓扑结构、特点和工作原理。建立了一个简化的磁路模型来揭示 ASP 设计的潜在漏磁减少机制，并对转子极数进行了分析优化。然后对设计参数进行全局优化，以提高扭矩质量。此外，ASP 和传统 FRPM 机器的电磁特性进行了比较。最后，通过实验验证了理论结果。