基于Popov超稳定理论的PMSM转速辨识

摘要

针对永磁同步电动机参数变化导致转速不准的问题,提出一种基于观测q轴电流的模型参考自适应(MRAS)转速估计策略.该方法在基于iq=o转子定向控制永磁同步电机的基础上,将实际电流和估算电流的偏差作为自适应PI调节器输入,借助Popov超稳定性理论设计了一种简化的MRAS估算模型,从而得到估计转速,同时辨识定子电阻.通过Matlab软件对算法进行仿真,并根据仿真模型设计了基于STM32的永磁同步控制系统,结果表明采用自适应模型进行转速估计同传统的PID控制方法相比,具有较高的转速估计精度,鲁棒性强.%In view of the problem of the permanent magnet synchronous motor parameter variation,a model reference adaptive (MRAS) speed estimation method based on observation q axis current is proposed.In this method,based on the iq=0 rotor orientation control of permanent magnet synchronous motor,the actual current and estimated current deviation are used as adaptive PI regulator input,a simplified MRAS estimation model is designed with the aid of the Popov super stability theory.Through the MATLAB software algorithm,simulation is carried out.And based on the simulation model control system of permanent magnet synchronous STM32 is designed.The results show that the adaptive model of speed estimation compared with the traditional PID control method has higher accuracy and strong robustness.