Xu Gaohong, Liu Guohai, Du Xinxin, Bian Fangfang
AIP Adv. 2017 Mar 7;7(5):056671. doi: 10.1063/1.4978400. eCollection 2017 May.
This paper proposes a novel permanent magnet (PM) motor for high torque performance, in which hybrid PM material and asymmetric rotor design are applied. The hybrid PM material is adopted to reduce the consumption of rare-earth PM because ferrite PM is assisted to enhance the torque production. Meanwhile, the rotor structure is designed to be asymmetric by shifting the surface-insert PM (SPM), which is used to improve the torque performance, including average torque and torque ripple. Moreover, the reasons for improvement of the torque performance are explained by evaluation and analysis of the performances of the proposed motor. Compared with SPM motor and V-type motor, the merit of high utilization ratio of rare-earth PM is also confirmed, showing that the proposed motor can offer higher torque density and lower torque ripple simultaneously with less consumption of rare-earth PM.
本文提出了一种用于高转矩性能的新型永磁（PM）电机，其中应用了混合永磁材料和非对称转子设计。采用混合永磁材料以减少稀土永磁体的消耗，因为铁氧体永磁体有助于增强转矩产生。同时，通过移动表面插入式永磁体（SPM）将转子结构设计为非对称，用于改善转矩性能，包括平均转矩和转矩脉动。此外，通过对所提出电机的性能评估和分析，解释了转矩性能提高的原因。与表面插入式永磁电机和V型电机相比，还证实了稀土永磁体高利用率的优点，表明所提出的电机能够在稀土永磁体消耗较少的情况下同时提供更高的转矩密度和更低的转矩脉动。
