双凸极无刷直流发电机在开关磁阻发电方式下的工作特性  

Operation Characteristics of Switched Reluctance Generation Mode for Doubly Salient Brushless DC Generator

作　　者：邱鑫[1] 张卓然[1] 朱德明[1] 严仰光[1] 王慧贞[1] 

机构地区：[1]航空电源航空科技重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2010年第21期54-60,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50807023);国家重点基础研究发展计划项目(973项目)(2007CB210302)~~

摘　　要：电励磁双凸极无刷直流发电机在开关磁阻发电方式下,电枢反应起增磁作用,利于减小励磁功率。借助有限元计算分析第1气隙和第2气隙的长度关系对电励磁双凸极无刷直流发电机开关磁阻发电方式下空载特性的影响。研究不同负载状态下,电机开关磁阻发电方式时的磁链变化特征和换相工作模态,得到换相重叠和电枢反应对发电机外特性的影响,揭示了大负载状态下电机电枢反应增磁作用使换相重叠角增大,从而使电机外特性变软的问题。2kW低速电励磁双凸极无刷直流发电机的实验结果验证了仿真分析的正确性,进而给出2.6MW大功率直驱风力发电机的设计实例,并通过有限元计算验证了该结论。The armature reaction of electromagnetic doubly salient brushless DC generator with switched reluctance generation mode increases magnetic,which is beneficial to decrease excitation power. By means of finite element analysis （FEA）,the effect of the first and second air-gap on electromagnetic doubly salient brushless DC generator＇s no-load characteristic was discussed. Besides,study on variation characteristics and commutation modes of different load conditions obtained influences of commutation overlap and armature reaction on external characteristics. Armature reaction of heavy load condition increased magnetic and overlap angle,which softened external characteristics. Experimentation of a 2 kW electromagnetic doubly salient brushless DC generator was given to verify the validity of FEA analysis results. A design example of 2.6 MW high power direct driven wind turbine is carried out to confirm correctness of the conclusion.

关 键 词：双凸极无刷直流发电机 开关磁阻发电方式 换相重叠 电枢反应 风力发电机 

分 类 号：TM352[电气工程—电机]