基于反电动势的多相感应电机MRAS控制策略优化

Optimization of MRAS control strategy for multiphase induction motor based on back EMF

针对舰用多相电力推进系统无速度传感器控制的需求,将带输入滤波环节的基于电机反电动势的模型参考自适应(MRAS)方法用于多相感应电机无速度传感器矢量控制系统,推导了系统的小信号模型,分析了滤波截止频率和转速估算PI参数对系统性能的影响,并在此基础上设计了变滤波截止频率变PI参数优化的MRAS控制策略。仿真和实验结果表明:该优化方法具有更高的转速估算精度和静、动态控制性能。

For the demand of speed sensorless control of marine multiphase electric propulsion systems,uses model reference adaptive system(MRAS)with input filter based on back EMF in multiphase induction motor speed sensorless vector control system.Small signal model of the system is derived to analyze the influence on system performance by cutoff frequency and speed estimation PI parameter.Based on that,an optimized MRAS control strategy of variable cutoff frequency and variable PI parameters is designed.The simulation and experimental verification of the system are carried out,and the results show that the optimized method has higher estimation accuracy of the speed and is capable of static and dynamic performance.