无磁轭辐射环双定子电机磁场分析及转矩计算  

The Magnetic Field Analysis and Torque Calculation of a Dual-stator Motor With a Yokeless Radial Ring

作　　者：孙贤备 陈进华[1] 陈思鲁 陈庆盈 张驰[1] SUN Xianbei;CHEN Jinhua;CHEN Silu;CHEN Qingying;ZHANG Chi(Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo Zhejiang 315201,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《微电机》2023年第10期7-12,共6页Micromotors

基　　金：浙江省科技计划项目-领雁计划(2023C01179);国家自然科学基金(U20A20282),(U1913214);宁波市科技创新2025重大专项(2022Z036),(2020Z069)。

摘　　要：提出一种双定子永磁同步电机,转子采用辐射环结构,无转子磁轭,可减小转子转动惯量和空间占比,增大内定子空间,从而提高电机转矩密度。首先,建立辐射环结构双定子电机和常规的双定子电机的等效空载磁路模型,通过磁路法进行分析计算,得到两种结构双定子电机永磁体工作点的磁通,从而计算其反电势和转矩常数。其次,建立两种双定子结构有限元仿真模型,通过仿真得到其反电势波形及转矩常数,验证磁路法的正确性,仿真结果表明,采用无磁轭辐射环结构,电机转矩常数比常规的双定子电机大13.7%。最后,研制无磁轭辐射环结构双定子电机,并进行实验,实验得出的转矩常数与有限元仿真最大误差为3.84%。A dual-stator permanent magnet synchronous motor was proposed.The rotor adopted a radial ring structure,and there is no rotor yoke,which can reduce the rotor inertia and space ratio,increase the inner stator space,and thus increase the torque density of the motor.First,the equivalent no-load magnetic circuit model of the radial ring structure double-stator motor and the conventional double-stator motor was established,and the magnetic flux of the permanent magnet working point of the two-structure double-stator motor was obtained through the analysis and calculation of the magnetic circuit method,thus the back EMF and torque constant were calculated.Secondly,two finite element simulation models of double-stator structures were established,and their back EMF waveforms and torque constants were obtained through simulation to verify the correctness of the magnetic circuit method.The simulation results show that the torque constant of the motor which adopted a yokeless radial ring structure is 13.7%larger than that of the conventional dual-stator motor.Finally,a double-stator motor with a yokeless radial ring structure was developed and experiments were carried out.The maximum error between the torque constant obtained from the experiment and the finite element simulation was 3.84%.

关 键 词：双定子 辐射环 转矩密度 无磁轭 

分 类 号：TM351[电气工程—电机] TM341