一种交替极切向励磁游标永磁电机的分析与设计  

Analysis of a Consequent-Pole Spoke-Array Vernier Permanent Magnet Machine

作　　者：梁子漪 曲荣海[1] 李大伟[1] 任翔[1] 高玉婷[1] Liang Ziyi;Qu Ronghai;Li Dawei;Ren Xiang;Gao Yuting(State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074

出　　处：《电工技术学报》2020年第15期3173-3181,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51520105010)和国家自然科学基金青年基金(51807076)资助项目。

摘　　要：提出一种新型带连接桥交替极切向励磁的游标永磁电机用以提升高极比(转子极对数与定子绕组极对数之比)切向励磁游标永磁电机的转矩密度。新型拓扑转子轭部表面均匀分布多个"h"形由连接桥和主齿组成的转子齿,切向励磁的永磁体插入转子齿中。连接桥为主磁场提供磁通路径,避免主磁通以"之"字形来回穿梭在气隙中,还可以减小气隙磁阻,削弱磁障效应,从而增大气隙磁通密度,提升电机的反电动势和转矩密度。此外,新型拓扑永磁体极性相同,磁钢用量减少一半,降低了电机成本。该文首先说明磁障效应产生的原因并介绍新型电机拓扑结构和工作原理;然后分析主要参数对转矩性能的影响;最后通过有限元仿真对比传统拓扑和新型拓扑电磁性能,结果表明,在相同体积与热负荷下,新型拓扑具有更高的转矩密度和更低的磁钢用量。In this paper, a novel spoke-array vernier permanent magnet(SA-VPM) machine with consequent-pole magnets and flux bridges is proposed to improve the torque density of the SA-VPM machine with high pole ratio(ratio of rotor pole pair number to winding pole pair number). In the proposed SA-VPM machine, the magnets with circumferential magnetization have the same polarity and the flux bridges are attached to the side-faces of rotor permanent magnets(PMs), which can weaken the flux barrier effect and strengthen the flux modulation effect, thus improving the air-gap flux density, back-EMF and torque density. Moreover, the proposed SA-VPM machine can save the usage of PMs due to the consequent-pole structure. The flux barrier effect, configuration and operational principles of the proposed SA-VPM machine are introduced. Then, the influences of several main parameters on torque performance are researched. Finally, the electromagnetic performances of the conventional and proposed SA-VPM machines are compared by finite element analysis(FEA). The results prove that the proposed machine has higher torque density and lower PM usage.

关 键 词：切向励磁游标永磁电机 交替极 连接桥 磁障效应 

分 类 号：TM351[电气工程—电机]