轴向磁通定子无铁心发电机磁场解析及转子优化设计  

Magnetic field analysis and rotor optimization for coreless axial flux permanent magnet synchronous machine

作　　者：王晓光[1] 尹浩 余仁伟 WANG Xiaoguang;YIN Hao;YU Renwei(Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment,Hubei University of Technology,Wuhan 430068,China;RAYGET Mechanical&Electrical(Wuhan)Co.,Ltd.,Wuhan 430073,China)

机构地区：[1]湖北工业大学新能源及电网装备安全监测湖北省工程研究中心,湖北武汉430068 [2]锐革机电(武汉)有限公司,湖北武汉430073

出　　处：《电机与控制学报》2024年第9期170-178,共9页Electric Machines and Control

基　　金：湖北省教育厅科学技术研究计划重点项目(D20201407)。

摘　　要：定子无铁心轴向永磁发电机(CAFPMSM)具有结构简单、启动转矩低、功率密度高等优点,在小型风力发电机、汽油发电机等场合具有潜在应用前景。但CAFPMSM的转子磁场呈现典型的三维特性,其对无铁心绕组损耗的影响有别于传统电机。基于对电机转子磁场等效磁路的解析结果,以优化电机输出电压畸变率、降低电机绕组损耗为目的,通过加入导磁极的方式,对电机的转子结构进行优化设计。首先建立新型结构电机磁路等效模型,计算各磁路磁阻以及漏磁系数,然后利用有限元软件,验证理论解析的准确性,最后设计制造试验样机,并对其进行反电动势以及绕组涡流损耗测试。试验结果表明,新型结构电机反电动势波形畸变率、绕组产生的涡流损耗及绕组温升均有所降低。The coreless axial flux permanent magnet synchronous machine(CAFPMSM)has the advanta-ges of simple structure,low starting torque and high power density.However,the air gap magnetic field of CAFPMSM exhibits typical three-dimensional characteristics,and its effect on eddy current losses of coreless winding is different from conventional machine.Based on the results of the equivalent magnetic circuit of the air gap flux field,the rotor structure of the machine was optimally designed to optimize the output voltage distortion rate and reduce the eddy current losses of the winding.Firstly,the equivalent magnetic circuit model of the new structure motor was established.The magnetic resistance and magnetic leakage coefficient of each magnetic circuit were calculated.Then,accuracy of theoretical analysis was verified by using finite element software.Finally,the experimental prototype was measured for counter-e-lectromotive force and eddy current loss of the machine,and the experimental results show that the distor-tion rate of counter-electromotive force waveform,eddy current loss and temperature rise of the new struc-ture machine are reduced.

关 键 词：轴向磁通电机 无铁心 磁场解析 涡流损耗 畸变率 转子优化 

分 类 号：TM351[电气工程—电机]