无刷双馈磁阻电机的等效电路与稳态特性分析

无刷双馈电机的定子具有极数和供电频率皆不相同的功率绕组和控制绕组,难以采用传统感应电机的等效电路进行稳态特性分析。根据两套定子绕组的电磁耦合关系特点,提出一种基于频率归算而无需进行极数归算的无刷双馈磁阻电机的等效电路。该等效电路与传统感应电机等效电路具有相似的形式,可用于无刷双馈电机稳态特性分析。文中介绍了采用该等效电路对一台5kW轴向叠片磁阻转子无刷双馈电机的稳态特性分析。仿真结果与实验结果相吻合,从而证明了所提出的磁阻转子无刷双馈等效电路的正确性和实用性。

Equivalent Circuit and Stead-State Behavior of Doubly Fed Brushless Reluctance Machine

There are power winding and control winding with different pole numbers and frequencies on the stator of doubly fed brushless machines. The equivalent circuit of conventional induction machine can not be used for the analysis of steady-state behavior of the doubly fed brushless machines. Based on the analysis of the feature of the electromagnetic coupling relationship between the power winding and control winding, an equivalent circuit of a doubly-fed brushless reluctance machine is presents, which only needs frequency referring and without pole number referring. The proposed equivalent circuit is similar to that of the conventional induction machines, and can be used for the analysis of steady-state performance of the doubly fed brushless machine. The application of the equivalent circuit for the steady-state analysis of a 5kW doubly fed brushless prototype machine with reluctance rotor is introduces. The correspondence between the simulation results and the tested results shows the correctness and feasibility of the proposed equivalent circuit of the doubly fed brushless reluctance machine.