五相容错双凸极发电机单相短路故障分析  

Analysis on Single-phase Short-circuit Performances of Five-phase Fault-tolerant Doubly Salient Electro-magnetic Generators

作　　者：赵耀[1] 王慧贞[1] 赵晓中 肖岚[1] 

机构地区：[1]南京航空航天大学航空航天电源技术教育部工程研究中心,江苏省南京市210016 [2]蚌埠汽车士官学校,安徽省蚌埠市233011

出　　处：《中国电机工程学报》2013年第30期90-97,14,共8页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2007CB210302);中航611所基金项目;江苏省普通高校研究生科研创新计划项目(CXZZ13_0161)~~

摘　　要：对五相容错电励磁双凸极发电机(doubly salient electro-magnet generator,DSEG)的结构特点进行了理论分析。研究了电机空载运行时短路相的自感和电势,分析了短路故障对其他相磁链和电势的影响以及发生短路故障时电机的整流输出电势。对电机在不同励磁电流下加载运行时发生单相绕组短路故障的外特性、功率特性以及短路电流进行了分析。在考虑电枢绕组电阻的情况下,对电机空载运行时在4个不同时刻发生单相短路故障时的磁场、短路相磁链和短路电流进行了有限元分析。分析结果表明:短路故障发生初始时刻,短路相磁链随着电机转子位置的不同而不同;经过54电角度后,短路相磁链的最大、最小值和变化趋势与发生短路的时刻无关。最后通过对一台五相20/16-2结构DSEG样机进行实验,验证了理论分析的正确性。In this paper, the structure characteristics of five-phase doubly salient electro-magnet generators （DSEGs） are analyzed theoretically. The self-inductance and voltage of the short-circuit phase are investigated, the flux linkage, voltage of normal phases and the rectified voltage are analyzed when a single phase short-circuit fault happens under the no-load rarming condition. Meanwhile, the external and power characteristics of the motor and the short-circuit current are investigated with different exciting currents. The magnetic field of the motor, flux linkage of the short-circuit phase and short currents without load are investigated with armature winding resistances in four different short-circuit moments using finite-element method. The analysis results show that the initial flux linkage value of the short-circuit phase is varied with different short-circuit moments, and the minimum value, maximum value and the variation tendency of flux linkage of the short-circuit phase are irrelevant to the fault moment after 54° electrical degree. Finally, the characteristics of a five-phase 20/16-2 DSEG are verified by the experimental results.

关 键 词：容错 有限元分析 电励磁双凸极发电机 短路故障 励磁电流 

分 类 号：TM352[电气工程—电机]