中文摘要：

等效电路是电机性能分析的重要工具。由于无刷双馈电机为多耦合系统,传统等效电路计算复杂,该文提出了无刷双馈电机更简洁的‘∏’型等效电路,为这种电机的性能分析提供了简单有效的方法。首先根据感应电机基本原理,引出了无刷双馈电机的基本等效电路,考虑无刷双馈电机具体适用工况,将基本等效电路参数均折算到控制绕组。然后,在控制绕组为参考的等效电路基础上,通过电路等效,导出无刷双馈电机的‘∏’型等效电路。进一步对绕线转子无刷双馈电机等效电路的参数获得进行研究,讨论了使用解析法需要注意的地方;并提出用试验直接测定无刷双馈电机基本电路参数的办法。最后,在60k W绕线转子无刷双馈电机样机平台上进行试验,试验结果验证了‘∏’型等效电路的有效性,及参数计算、测试方法的正确性。

英文摘要：

The equivalent circuit is an important method for performance analysis of electrical machines. Since the brushless doubly-fed machine （BDFM） is a multi-variable coupled system, in view of equivalent circuits, a concise complexity of conventional ‘∏＇-type equivalent circuit of wound rotor BDFM was presented for easily and effectively calculating and analyzing the machine performance. Firstly, according to the basic principle of induction machines, a basic equivalent circuit of the BDFM was introduced. Considering specific working conditions of the BDFM, parameters of basic equivalent circuits were referred to the control winding. And then, at the basis of the basic equivalent circuit referred to control winding, a ‘∏＇-type equivalent circuit was derived. Next, parameter identification was studied, matters of circuit methods that need to pay attention to were discussed, and a testing method to obtain circuit parameters was put forward. At last, tests were conducted on the experimental rig of a 60 kW wound rotor BDFM. The testing results verify the effectiveness of the ‘∏＇-type equivalent circuit, the validity of parameter calculating and the testing method.