定子分布励磁双凸极无刷直流发电机电磁特性研究  

Analysis of Electromagnetic Performance of Doubly Salient Brushless DC Generator With Distributed Field Magnetomotive Forces

作　　者：孙林楠 张卓然[1] 于立[1] 耿伟伟[1] 

机构地区：[1]多电飞机电气系统工信部重点实验室(南京航空航天大学),江苏省南京市211106

出　　处：《中国电机工程学报》2017年第21期6218-6226,共9页Proceedings of the CSEE

基　　金：国家优秀青年科学基金项目(51622704);江苏省杰出青年基金项目(BK20150033);南京航空航天大学博士学位论文创新与创优基金(BCXJ15-01);研究生创新基地(实验室)开放基金(kfjj20170307)~~

摘　　要：定子集中励磁双凸极电机与不控整流电路构成的双凸极无刷直流发电机具有调压方便、可靠性高的特点,但其存在三相磁路不对称的固有问题,进而影响三相电势波形与输出电压脉动。深入研究定子分布励磁的电励磁双凸极发电机,对比了分布励磁与集中励磁双凸极发电机结构特点与运行原理,用有限元方法分析了分布励磁双凸极电机的电枢反应、电感特性和磁场分布,并对多相电机及其绕组形式和发电模态进行了研究。研制了原理样机,实验结果与仿真分析一致,表明分布式励磁双凸极无刷直流发电机在合理的绕组结构和整流方式下具有良好的发电性能,解决了传统双凸极无刷直流发电机的整流输出电压脉动大和相电流不对称的问题。The doubly salient brushless DC generator （DSBLDCG）, which is constituted of a doubly salient electromagnetic machine with concentrated field magnetomotive forces （DSEM-CF） and the associated uncontrolled rectifier circuit has the characteristics of convenient voltage regulation and high reliability. However, the machine suffers from the inherent characteristics of asymmetric flux path for the phases, which has influence on the phase electromotive force （EMF） and output voltage ripple. The generating performance of the doubly salient electro-magnetic machine with distributed field magnetomotive forces （DSEM-DF） was investigated in this paper. The comparison of structure characteristics and operation performance between DSEM-DF and DSEM-CF was carded out. The armature reaction, inductance characteristics and flux distribution were investigated by finite element （FE） method. The multi-phase machine and its winding configuration in different generating mode were analyzed. The prototype was designed and manufactured and the analysis of electromagnetic performance was validated by experiments. The results show that with the reasonable winding configuration and rectifier, the DSBLDCG constituted by DSEM-DF has good generating performance. The output DC voltage tipple can be reduced and the phase current waveforms are improved to be symmetric.

关 键 词：双凸极电机 无刷直流发电机 分布励磁磁势 多相电机 电感特性 发电模态 

分 类 号：TM341[电气工程—电机]