一种基于无功功率的感应电动机复合转速辨识方法

A Hybrid Rotate Speed Identification Method Based on Reactive Power of Induction Motor

针对基于无功功率的模型参考自适应转速辨识法在动态过程中存在的收敛慢问题,提出了一种基于无功功率的复合转速辨识方法,即将基于无功功率的直接计算法和MRAS转速辨识法相结合的方法。实验结果证明,该方法既具有直接计算法的快速跟随能力,又有MRAS转速辨识法的强抗干扰能力,且算法简单,所用电动机参数少,容易在工程中实现。

In view of the problem of slow convergence of rotate speed identification method of Model Referencing Adaptive System（MRAS） based on reactive power in dynamic process, the paper proposed a hybrid rotate speed identification method based on reactive power, namely combining direct calculation method with MRAS rotate speed identification method. The experimental results showed that the method not only has fast following ability of direct calculation method, but also has strong anti-interference ability of MRAS rotate speed identification method. Meanwhile, the method has simple algorithm and less motor parameters, which is easily realized in engineering.