表嵌式交替极永磁电机拓扑演化及气隙磁场调制效应研究  

Investigation of Topologies Evolution and Air-Gap Field Modulation Effect on Surface-Inset Consequent-Pole PM Machines

作　　者：李亚 周庆林 丁石川[1] 李伟[1] 杭俊[1] Li Ya;Zhou Qinglin;Ding Shichuan;Li Wei;Hang Jun(School of Electrical Engineering and Automation Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学电气工程与自动化学院,合肥230601

出　　处：《电工技术学报》2023年第12期3188-3198,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51607001,52177027,52107034);安徽省自然科学基金优秀青年项目(2108085Y18);安徽省高校优秀青年人才重点项目(gxyqZD2021090);安徽省重大科技专项(202203c08020010)资助。

摘　　要：与传统表贴式永磁(SPM)电机相比,交替极永磁(CPM)电机部分磁极被转子铁心极替代,因此具有相对较高的永磁体利用率,且具有与SPM相媲美的转矩输出能力。该文对CPM电机拓扑演化规律进行分析,总结CPM电机不同永磁结构下的磁极特征。在此基础上,量化分析不同永磁结构下CPM电机气隙磁通密度调制谐波的转矩贡献,揭示不同永磁结构对CPM电机气隙磁场调制效应的影响规律。制作了一台CPM样机并进行了样机试验,验证了理论分析与仿真的可靠性。Compared with traditional surfaced-mounted permanent magnet(SPM)machine,the consequentpole permanent magnet(CPM)structures show a higher permanent magnet(PM)utilization ratio and comparable torque capability.Thus,the various PM arrangements are developed and studied in recent years.However,the corresponding topology evolution and the underlying air-gap field modulation(AGFM)mechanism are unrevealed.To present an in-depth understanding of their torque production principle,the topology evaluation and their AGFM effect in the surface-inset CPM machines were investigated and compared.Firstly,topology evaluation of the CPM machines with different PM arrangements was illustrated by adopting PM unit concept.According to their relationship of the rotor modulated teeth and PM pole-pair number,the CPM machines with different pole-pair PMs in a PM unit was developed.Different from conventional CPM configurations share with same PM pole-pair and rotor modulated teeth,the unconventional CPM machines have the unequal number of the PM pole-pair and rotor modulated teeth.Some topological evolution rules can be summarized as:(1)When n(≥2)pole-pair of PMs are included in a PM unit,n typical non-traditional CPM structures can be formed.(2)An unconventional CPM machine with n(≥2)pole-pair of PMs in a PM unit,the maximum number of the rotor modulated teeth is n−1.(3)Because the S pole(or N pole)and the adjacent N and S poles in a PM unit can be replaced by the rotor iron teeth,there are two types of non-traditional CPM structures can be formed when the rotor modulation tooth is 1 in a PM unit.To identify the different PM arrangement on their air-gap magnetic field,torque contributions of the various air-gap field harmonics were quantified by Maxwell Stress Tensor method(MSTD).The simulation results show that various air-gap field modulated harmonics are responsible for torque generation in three typical CPM machines,which implies that the pronounced AGFM effect can be obtained in conventional and unconventional CPM cases.Beside

关 键 词：磁场调制效应 交替极 转矩量化分析 永磁电机 

分 类 号：TM351[电气工程—电机]