交流调磁双交错混合励磁电机的等效磁路模型

Equivalent Magnetic Circuit Model for DCHES Machine

本文提出了一种双交错混合励磁电机,该电机采用交流调磁方式,可以简单、灵活地调节电机气隙磁场、改变线圈感应电动势,具有双向对称调磁能力。本文分析了该电机的结构特点和工作原理,结合该新型电机的磁场分布,建立了交直轴等效磁路模型,计算了各段磁路上的磁阻,进而求得电枢绕组中感应的磁通。同时,采用三维有限元分析法对电机进行仿真,得到不同调磁状态下的电枢反电动势。将两种方法的计算结果进行对比,二者基本一致,验证了所提出模型的有效性。

In this paper,a Dual Consequent Hybrid Excitation Synchronous（ DCHES） Machine was presented. The DCHES machine adopts AC excitation mode,which equips the machine with a symmetric bidirectional flux control capability. Its structure and working principles were analyzed in this paper. According to the magnetic field distribution of DCHES machine,the d-and q-axis equivalent magnetic circuit models were established,then the reluctance of each part of magnetic circuit and the flux coupled with the armature winding were deduced. At the same time,the three-dimensional finite element analysis method was used to calculate the air-gap flux and the back-EMF under different excitation levels. The results coming from two different methods were consistent with each other,which verified the presented model in this paper.