【摘要】 电励磁双凸极发电机(wound-field doubly salient generator,WFDSG)的极数和极弧系数设计不当会导致电机产生较大的定位转矩和励磁绕组反电势。为了设计容错能力强、电压脉动率小的多相WFDSG,该文对多相WFDSG的极数和极弧系数进行了研究。在分析多相WFDSG原理的基础上,确定了多相WFDSG的设计要求;分析了定转子极数和极弧系数等结构参数对各绕组电感、电动势等性能参数的影响规律,推导了多相WFDSG普遍适用的定子极数、转子极数和定转子极弧系数等结构参数的约束公式,为设计多相双凸极电机提供理论基础。依据上述理论设计了一种12/9极四相WFDSG,利用有限元软件对传统WFDSG和该文设计的新型四相WFDSG样机进行了对比分析,试制了样机并进行了实验。仿真和实验结果验证了所提出的设计方法和电机结构的合理性。更多还原

【Abstract】 The wound-field doubly salient generator(WFDSG) will produce a great cogging torque and a field winding back EMF if its pole number and pole arc coefficients were not well designed. In order to design a multiphase WFDSG with fault tolerance and low voltage ripple, this paper investigates the pole number and pole arc coefficients of the multiphase WFDSG. Based on the analysis of the WFDSG principle, the design requirements for WFDSG are presented. The relationship between performance parameters and topology parameters that includes the stator pole, the rotor pole and their pole arc coefficients is analyzed. The constraint rules of the machine stator pole, the rotor pole and their pole arc coefficients for multiphase doubly salient machine are given, which provide a theoretical basis for the phase redundant WFDSG. A new 12/9-pole four-phase WFDSG is proposed and designed. And its characteristics are investigated by the finite element method(FEM) simulation and the experiment on a prototype of WFDSG. Both simulation and experimental results verify that the design method and the machine structure presented in this paper are correct.更多还原