摘要：电励磁双凸极发电机具有转子结构简单、可靠性好、功率较高、励磁可调等优点，因而受到国内外学者的大量关注。针对24/18极四相电励磁双凸极电机，利用电机仿真软件MaxwellAnsoft建立发电机的2D有限元仿真模型，旨在研究改变电机结构参数对电机稳态特性的影响。通过对电机的磁场分布、气隙磁密、绕组磁链、电感、相电流、相电势、输出转矩等一系列稳态特性的分析，从加宽转子极和加宽定子极两个方面对电机进行优化。仿真结果表明：优化后的电机输出功率明显增加，为合理地设计四相双凸极电机提供了参考。

关键词：四相双凸极发电机；有限元分析；优化
Abstract: The Woundfield Doubly Salient Generator (WFDSG) has the prominent advantages of simple structure, high reliability, high power and controllable excitation. A lot of research works on the topologies of this kind of machines were done by the scholars at home and abroad. A fourphase 24/18 poles WFDSG is modeled by Ansoft. The influences of different structure parameters on steady characteristics were investigated. Finite element analysis was carried out to investigate its steady characteristics, such as field distribution, air gap magnetic density, field flux, inductance, armature current, armature voltage and electromagnetic torque. It is found that the widened rotor pole and stator pole are helpful to improve the power characteristic. The optimization results provide the design references for the fourphase WFDSG.

Key words: fourphase doubly salient generator; finite element analysis; optimization