混合励磁磁悬浮开关磁阻电机转矩建模与分析  

Torque modeling and analysis of hybrid-excitation bearingless switched reluctance motor

作　　者：欧钰 项倩雯[1] Ou Yu;Xiang Qianwen(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：《电子测量技术》2024年第2期9-16,共8页Electronic Measurement Technology

摘　　要：针对传统磁悬浮开关磁阻电机的输出转矩小及转矩与悬浮的耦合问题,提出一种四相16/14/8极混合励磁双定子磁悬浮开关磁阻电机。介绍了该电机的拓扑结构、转矩原理与悬浮原理,并优化了转矩绕组的励磁方式,运用有限元法比较分析了该电机与同参数不加永磁体电机的电磁特性,包括电机的转矩特性以及解耦特性,仿真结果验证了该电机自解耦结构的合理性及能有效提高输出转矩。在麦克斯韦应力法基础上,根据电机工作时的磁通分布建立了等效磁路图,采用分段函数拟合铁芯磁化曲线,推导出了考虑磁饱和的转矩数学模型,有限元仿真分析验证了转矩模型与仿真结果较吻合,最小相差约1.4%,最大相差约26%。Aiming at the small output torque and the coupling problem between torque and suspension of traditional bearingless switched reluctance motor,a four-phase 16/14/8-pole hybrid-excitation double stator bearingless switched reluctance motor is proposed in this paper.The topological structure,torque principle and suspension principle of the motor are introduced,and the excitation mode of the torque winding is optimized.The electromagnetic characteristics of the motor with the same parameters without permanent magnet are compared and analyzed by finite element method,including the torque characteristics and decoupling characteristics of the motor.The simulation results verify that the self-decoupling structure of the motor is reasonable and can effectively improve the output torque.On the basis of Maxwell stress method,the equivalent magnetic circuit diagram is established according to the magnetic flux distribution of the motor,and the core magnetization curve is fitted by piecewise function.The mathematical model of torque considering magnetic saturation is derived.The torque model agrees well with the simulation results verified by the finite element,with a minimum difference of about 1.4%and a maximum difference of about 26%.

关 键 词：混合励磁 磁悬浮开关磁阻电机 麦克斯韦应力法 磁饱和 

分 类 号：TM352[电气工程—电机]