高转矩性能多相组永磁电机及其关键技术综述  

Overview of Multi-Star Multi-Phase Permanent Magnet Machines with High Torque Performance and Its Key Technologies

作　　者：孙玉华 赵文祥[1] 吉敬华[1] 曾煜 凌志健 Sun Yuhua;Zhao Wenxiang;Ji Jinghua;Zeng Yu;Ling Zhijian(School of Electrical and Information Engineering Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,镇江212013

出　　处：《电工技术学报》2023年第6期1403-1420,共18页Transactions of China Electrotechnical Society

基　　金：国家杰出青年科学基金(52025073);江苏省研究生科研创新计划(KYCX21-3358)资助项目。

摘　　要：多相组永磁电机具有转矩密度高、转矩脉动小、容错能力强的优点,在航空航天、舰船推进等高转矩性能应用场合得到广泛的关注。首先,该文探讨多相组永磁电机的绕组拓扑特点,分析其转矩性能提升机理,归纳转矩性能最优的相移角设计规律。其次,总结了近年来国内外学者在多相组永磁电机领域已开展的工作,重点围绕槽极配比、拓扑结构、相组间联结方式等关键技术进行介绍。然后,基于电流谐波注入和永磁体谐波注削技术,进一步阐述了提高多相组永磁电机转矩性能的方法。针对多相组永磁电机高可靠设计技术,从短路电流抑制、相间独立性提高、绕组余度提升的层面进行了整理和归纳。最后,对高转矩性能多相组永磁电机进行总结与展望。Compared with the traditional three-phase permanent-magnet(PM)machine,the multi-star multi-phase PM machine has been paid much expectation in high-end applications due to its high torque density,small torque ripple,and robust fault tolerance.The phase shift angle is the key to affecting the torque performance of multi-star multi-phase PM machines.The general expression of the PM torque and reluctance torque is derived,and the elimination principle of torque harmonics is analyzed.Therefore,the optimal phase shift is summarized from the maximum,average,and minimum torque ripples.The purpose of this paper is to guide machine designers in phase shift design.Firstly,the multi-star multi-phase winding configurations are divided into two categories based on the winding set number k.The winding set number of the first type is odd,and the second type is even.According to the relationship between the torque harmonic phase,winding set number and phase number,the optimal phase shift can be calculated.Then,the classical research of domestic and abroad scholars in this field is overviewed and summarized,including the dual three-phase winding,dual five-phase winding,triple three-phase winding,four three-phase winding,etc.The finite element simulation results verify the advantages of the optimal phase shift in improving torque performance.Moreover,the enhancement effect is not influenced by the slot/pole combination and rotor structure.Secondly,the torque performance of the PM machines with multi-star multi-phase winding configuration can be further improved through harmonic efficiency enhancement technology.The typical methods are the current harmonic injection and PM shape modification.The former is advantageous to improve the armature reaction magnetic field,while the latter is focused on the PM magnetic field.Thanks to the compensation effect of optimal phase shift on torque harmonic phase,the torque density can be significantly improved without additional torque ripple.Thirdly,based on ensuring high torque performance,impro

关 键 词：永磁电机 多相组结构 转矩性能 相移角 可靠性 

分 类 号：TM351[电气工程—电机]