四相双电枢绕组分布电励磁双凸极电机短路故障研究

短路故障是一种较为严重的电机故障,研究电机在短路故障下运行特性对提高电机在特殊环境下的运行能力至关重要.本文提出了一种四相12/9极双电枢绕组分布电励磁双凸极电机,深入研究了其基本结构与工作原理.在此基础上通过有限元仿真研究电机在两种短路故障下的绕组电流、磁链和端电压等电磁特性,得出了短路电流产生的电枢反应对电机的影响...

Short-circuit Performances of Four-phase Dual Armature-winding Doubly Salient Electro-magnetic Machine With Distributed Magnetomotive Forces

Short circuit is a serious fault and it is essential to research the operation characteristics under short circuit fault for improving the performance under special circumstances. In this paper, a dual armature-winding doubly salient electro-magnetic machine with distributed field magnetomotive forces has been presented. The basic structure and operation principle are investigated. The electromagnetic performances under two short circuit faults, including winding current, flux linkage and terminal voltage, are investigated by finite element method. The influence of armature reaction caused by short-circuit current is analysed. Moreover, the relationship between the field current and short-circuit current and power characteristics are researched. Finally, the theoretical analysis is verified by the short-circuit experiment on a four-phase 12/9-pole dual armature-winding doubly salient electro-magnetic machine with distributed field magnetomotive forces prototype which is designed and manufactured.