基于准梯形永磁体的多相分数槽集中整距绕组永磁电动机齿槽转矩抑制  

Cogging Torque Reduction of Multiphase Fractional-slot Concentrated Full-pitch Winding Permanent Magnet Machine Based on Quasi-trapezoidal Permanent Magnet

作　　者：康惠林[1] 周理兵[1] 王晋[1] 彭溪[1] 

机构地区：[1]强电磁场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》2015年第21期154-160,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(51177056);国家自然科学基金青年科学基金项目(51307067)资助

摘　　要：对准梯形永磁体边沿厚度影响多相分数槽集中整距绕组电动机齿槽转矩的规律进行了研究。准梯形永磁体由正弦永磁体及第3,5次谐波合成得到,永磁体谐波分量的幅值依边沿厚度而定。为提高优化速度,采用复数磁导率模型计算齿槽转矩,并得到最优边沿厚度。对20槽22极外转子五相电动机进行解析计算发现,准梯形永磁体可抑制电动机齿槽转矩,且永磁体最优边沿厚度为最大厚度的0.5倍。齿槽转矩的有限元仿真和样机测量结果验证了解析计算及其结论的有效性。The impact of the edge thickness of the quasi-trapezoidal permanent magnet on cogging torque of multiphase fractional-slot concentrated full-pitch winding permanent magnet machines is investigated. The quasi- trapezoidal permanent magnet is actually the combination of the sinusoidal magnet and the injected third and fifth harmonics. The amplitudes of the magnet harmonics are determined by the edge thickness. The complex permanence model is adopted to calculate the cogging torque for faster optimization and determination of the optimal permanent magnet edge thickness. Analytical calculations of a 20-slot 22-pole external-rotor five-phase machine show that the quasi-trapezoidal permanent magnet is efficient to reduce cogging torque and the ratio of the optimal permanent magnet edge thickness to the maximum permanent magnet thickness is 0.5. The finite element analysis and experimental measurement of the cogging torque show the effectiveness of the analytical analysis and the conclusions.

关 键 词：多相电动机 准梯形永磁体 齿槽转矩抑制 复数磁导率模型 

分 类 号：TM315[电气工程—电机]