感应励磁式无刷同步电机设计与仿真分析

文中采用了一种感应励磁方式实现径向/切向混合励磁交流发电机的无刷励磁方案,依靠定子绕组磁场在转子励磁绕组内感应出的交流电流整流来获得同步电机的电励磁电流。文中详细介绍了该电机的结构特点和工作原理,借助有限元仿真的分析,得到了电机的空载特性和外特性曲线。仿真结果分析表明：该电机集成了永磁电机效率高和电励磁电机调磁方便等优点。此外,相比于传统两级式励磁方式,该交流发电机的无刷励磁方案使得电机具有结构简单等特点。

Design and Simulation Analysis of a Brushless Synchronous Machine with Induced-excitation

An excitation scheme of radial/tangential hybrid excitation brushless ac generator with a kind of induced-excitation is proposed in this paper. The excitation current of synchronous motor is obtained for rectifiered ac current of rotor exciting windings which is induced by the magnetic field of stator windings. Introduce its configuration characteristics and operation principle. The no-load characteristics and external characteristics are obtained by 2D finite element method. The simulation results indicate that it possesses the advantages of high efficiency of permanent magnet machine and adjustable magnetic of electric excitation machine. In addition, compared with traditional brushless scheme,the kind of motor has many more advantages,such as simple structure.