提出一种新型双馈变速凸极同步电机，阐述了它的基本原理和结构，电机的转子采用分裂磁极和正交绕组, 结构简单、可靠。转子绕组由低频交流变频电源供电，使电机具有变速恒频的特性。通过原型样机的试验，验证了该项发明的正确性和实用性，它将在大型水电、风电中得到广泛应用。

This paper presents a novel variable speed constant frequency doubly fed salient pole synchronous machine by patent. It deals with basic theory and construction of variable speed salient pole synchronous machines, especially on variable speed constant frequency characteristics. The split salient pole and orthogonal winding are adopted in rotor. The structure of the rotor is simple and tried. Variable frequency converter at rotor supplies the excitation winding. It makes machine to achieve good character of variable speed constant frequency. Experiments show that the patent is correct and practical through prototype test. It will be widely applied to large waterpower and wind power generators.