无刷双馈电机的转子导条不等间距优化设计

无刷双馈电机（BDFM）由于其特殊的结构,具有较高的谐波含量.针对转子导条分布对BDFM谐波含量的影响问题,通过绕组函数分析了类鼠笼型无刷双馈电机的气隙谐波磁场;并确立了转子导条分布（导条间距）对气隙磁场各次谐波含量的影响关系;结合3种不同转子结构的算例进行了理论分析.通过Ansoft有限元分析软件建立了3种转子结构的模型,分析对比了3种结构所得的气隙磁场谐波含量.研究结果验证了转子导条不均匀分布的内侧结构在抑制无刷双馈电机无用谐波、提高基波和有用谐波含量方面的有效性;所得结果为无刷双馈电机的进一步优化提供了很好的理论指导.

Optimal design of brushless doubly-fed machine with unequal-distance conductor rotor structure

As brushless doubly-fed machine （BDFM） is designed with special structure,the harmonic contents of BDFM are high.In order to research the relationship of rotor conductor distribution and BDFM＇s harmonic contents,winding function of the squirrel-cage BDFM was applied to analyze the effect of rotor conductor distribution to harmonic contents; and the relationship between the conductor distribution and harmonic contents was obtained; then the theoretical analysis of three different kinds of rotor structure was proposed.In the end,Ansoft finite element analysis software was applied to build different rotor structure,and their harmonic contents were compared.The result shows that the intensive-inner rotor conductor distribution structure has better effectiveness to restrain BDFM＇s useless harmonic wave,and improves the contents of basic wave and useful harmonic wave,which provides a good direction in BDFM＇s further optimization.