混合励磁磁通切换电机等效磁路模型  

Equivalent Magnetic Circuit Model of Flux-switching Hybrid Excitation Machine

作　　者：许泽刚[1] 谢少军[1] 毛鹏[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏省南京市210016

出　　处：《中国电机工程学报》2011年第30期124-131,共8页Proceedings of the CSEE

基　　金：常州市工业科技攻关计划项目(CE20100062);常州工学院自然科学研究基金(YN0904)~~

摘　　要：混合励磁磁通切换电机(flux-switching hybrid excitationmachine,FSHM)是一种新型定子励磁型交流无刷电机,具有磁链双极性、结构简单、功率密度高、运行可靠等优点。改变电励磁绕组电流的大小和方向,实现了对永磁气隙磁场的有效调节与控制,而引入导磁磁桥可提升气隙磁场调节范围。以建立电枢绕组磁链最大位置的等效磁路模型为切入点,推导了峰值磁通表达式,探索了磁桥段相对磁导率的估算方法,结合有限元仿真分析了磁桥厚度变化与磁桥式FSHM初始气隙磁密、磁桥磁密、气隙磁场调节能力、磁力线路径转移等特性的关系。样机的有限元仿真及实验结果与等效磁路模型预测趋势基本一致,验证了建模方法与理论分析的正确性,可用于指导磁通切换电机的设计与性能分析。Flux-switching hybrid excitation machine（FSHM） was an interesting brushless machine with magnets in the stator,which offered the advantages of bipolar flux linkage,simple and robust rotor structure and high power density.Adjustment and control of the PM air gap magnetic field could be achieved by means of controlling the field winding current,and magnetic bridge amplified the effect of field flux on PM flux.This paper took equivalent magnetic circuit model（EMCM） of maximum phase flux-linkage position as point of penetration,deduced the equation of peak magnetic flux,and explored a method for estimating the relative permeability of magnetic bridge.The characteristic relation between the thickness of magnetic bridge and initial air gap flux density,magnetic bridge flux density,regulating capacity of air gap magnetic field,and magnetic lines transfer were studied combined with finite element analysis（FEA）.The estimation results based on EMCM agreed well with the FEA and experiment data,which confirmed the correctness of modeling method and theoretical analysis.It provided reference for FSHM design and performance analysis.

关 键 词：混合励磁 磁通切换 永磁电机 等效磁路模型 

分 类 号：TM34[电气工程—电机]