对称分量法用于异步电动机参数测试

Parameter Estimation Technique of IM Based on the Symmetrical Component Method

在异步电机高性能驱动中,为了实现定子电流的励磁分量和转矩分量解耦,保证定子电流与转子磁链的准确定向,必须精确知道异步电机的电气参数。为了克服传统测量方法的缺点,基于异步电机在单相运行下的数学模型,推导出了一种电机参数测量的新方法。由于采用了对称分量法的原理,所以无须进行空载和短路实验。同其他方法比较,实验结果说明了所提出的方法有实用价值。

In high performance induction machine drive, accurate knowledge of the machine electrical parameters is required to ensure correct alignment of the stator current vector relative to the rotor flux vector ,to decouple the flux and torque-producing currents . For overcoming shortcoming of conventional test method, a novel algorithm of electrical parameters estimation of induction motor was developed , based on the mathemati- cal model of induction motor in single-phase running state. The proposed technique is based on the symmetrical component method, requiring no performing no-load test and locked rotor test. Compared with other method, the result shows that the technique can be practically used.