64kW双正弦结构无刷双馈发电机的设计与测试

Design and Testing of a 64 kW Doubly-sine Wound Rotor Brushless Doubly-fed Induction Generator

将正弦结构引入到基于齿谐波原理的无刷双馈电机转子绕组的设计中来,这一绕组设计方式克服了传统无刷双馈电机的导体利用率低、谐波磁动势含量大的缺陷。该文对转子绕组双正弦结构的无刷双馈电机的绕组设计原理、方法以及谐波磁动势计算进行了详细的分析,并以一台64 kW样机为例说明双正弦转子结构的设计方法。围绕样机在功率绕组带恒定负载时电机的各有功功率曲线和电机的效率、电机温升、恒定转速下功率绕组带载时输出电压的波形,以及无刷双馈发电系统的动态特性进行样机试验。试验结果表明,采用双正弦方法设计的绕线式无刷发电机具有优良的性能。

In this paper, the sine distribution winding structure is introduced to the design of the wound rotor which is designed based on slot harmonic of brushless doubly-fed induction generators （BDFIG）. It has overcome the defects of low conductor availability ratio and high harmonic contents. The structure of the double-sine rotor of BDFIG is presented in this paper. And the winding design principle, the method and the harmonic magnetomotive force （MMF） calculation are analyzed in detail. The design method of a 64 kW, for example, doubly-sine wound rotor of BDFIG is shown. At last, several experiments are carded out as follows： Curve of output power, prototype efficiency and temperature as power winding with constant load; the waveform of output voltages as power winding with loads under constant speed; dynamic performances of the prototype. The experimental results of the prototype machine show that the wound-rotor BDFIG which is designed by this manner has achieved excellent performances.