短磁路E型定子铁心电励磁双凸极发电机电磁特性分析  

Electromagnetic characteristics analysis of E-core stator doubly salient electro-magnetic generator with short circuit

作　　者：史立伟[1] 韩震 周晓宇[1] 张文超 安俊豪 严兵 SHI Li-wei;HAN Zhen;ZHOU Xiao-yu;ZHANG Wen-chao;AN Jun-hao;YAN Bing(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学电动汽车智能化动力集成技术国家地方联合工程研究中心,山东淄博255049

出　　处：《电机与控制学报》2020年第10期109-119,共11页Electric Machines and Control

基　　金：国家自然科学基金(51975340,51775320,51875327);校城融合计划(2018ZBXC197)。

摘　　要：传统电励磁双凸极发电机励磁绕组跨多个定子极绕制,存在励磁磁路较长、铁损耗大、各相磁路不完全对称等问题。为了提高故障隔离能力并实现各相对称,提出一种由E型定子铁心组成的短磁路模块化电励磁双凸极发电机。针对所提出的集中绕组E型定子铁心,在分析转子极弧系数对各绕组电感影响规律的基础上,推导出三相发电机的定/转子极数比,励磁定子极、电枢定子极和定子槽口对应的极弧角度的约束公式,为电机进行电磁设计奠定基础。利用有限元软件对三相9/10极和三相18/20极电机的各相电动势、电感等瞬态特性进行建模分析。根据Bertotti分离铁耗模型计算出新型三相18/20极与传统三相18/12极电机的铁损耗值,并通过仿真验证了新型三相18/20极具有较低的铁损耗。最后,试制一台三相18/20极的样机并进行了实验,实验结果验证了理论分析和电机结构的合理性。The excitation winding of traditional doubly salient electro-magnetic generator(DSEG)is wound across a plurality of stator poles.There are problems that the excitation magnetic circuit is long,the iron loss is large,and the magnetic paths of the phases are not completely symmetrical.In order to improve the fault isolation capability and realize the relative symmetry,a short magnetic circuit modular DSEG was proposed composed of E-core stator.For the proposed E-core stator,based on the analysis of the influence of rotor pole arc coefficient on the inductance,the stator-to-rotor pole ratio,polar arc angle corresponding to the excitation stator pole,armature stator pole and stator slot were deduced.This lays the foundation for the design of the generator.The finite element software was used to model the transient characteristics of three-phase 9/10-pole and 18/20-pole generator,such as electromotive force and inductance of each phase.According to the Bertotti separation iron loss model,the iron loss values of the new three-phase 18/20-pole and the traditional 18/12-pole generator were calculated,and the simulation shows that the 18/20-pole has low iron loss.Finally,a 18/20-pole generator was prototyped and tested.The experimental results verify the rationality of the theoretical analysis and generator structure.

关 键 词：电励磁双凸极发电机 E型定子铁心 极弧角度 模块化 铁损 

分 类 号：TM315[电气工程—电机]