新型两相磁通切换型双凸极永磁电机的静态特性研究(英文)

Study on Static Characteristics of a Novel Two-Phase Flux-Switching Doubly-Salient Permanent Magnet Machine

提出并分析了一种新型两相磁通切换型双凸极永磁电机的结构特点和运行原理,基于有限元法深入研究其静态特性,并通过转子斜槽以改善性能。解析分析了转矩的各个分量和引起脉动的主要因素。结果表明,双极性绕组永磁磁链显著增加了电机的转矩密度,且磁链和反电动势波形从本质上都是正弦分布,特别适合于无刷交流运行。所得结果为该种电机的设计、性能分析以及运行控制等提供了重要依据。

A novel 2-phase flux-switching permanent magnet （FSPM） machine with doubly-salient structure is proposed and analyzed, including the topology and operation principle. Based on finite element （FE） analysis, the static characteristics are investigated in detail and a rotor-skew method is proposed to alter the waveforms of the phase flux-linkage and consequently back-emf to be more sinusoidal. The analytical equation of electromagnetic torque is modeled, and the main factor leading to the torque ripple is analyzed. It is found that the coil open-circuit flux-linkage waveform is bipolar, and hence it exhibits significantly higher torque density. Besides, both the phase flux-linkage and back-emf are essentially sinusoidal, which makes it most appropriate for brushless AC operation. The results build a foundation for the design, performance analysis, and control strategy of this novel machine.