基于瞬时无功型MRAS的PMSM无速度传感器控制

Sensorless Control of PMSM Based on Instantaneous Reactive Power MRAS

研究了一种基于瞬时无功功率的MRAS永磁同步电机转速辨识系统,将PMSM瞬时无功功率作为参考模型,稳态下的无功功率作为可调模型。2个模型的输出误差,通过设计的自适应律来辨识电机转速和转子位置,利用该方案建立了永磁同步电机无速度传感器控制系统。理论分析和仿真结果均表明,该控制系统在转速和负载突变下均能准确跟踪转子的速度和空间位置,具有良好的鲁棒性和动、静态性能,同时降低了参数敏感性。

Studied a speed identification system of PMSM based on the instantaneous reactive power MRAS. Instantaneous reactive power of PMSM was used as the reference model and steady-state reactive power was used as the adjustable model. The output error of the two models was used to identify the motor speed and rotor position through the design of an adaptation mechanism. The speed sensorless control system of PMSM was established by using the scheme. The simulation results show that the control system can accurately track the speed and position of the rotor under the speed and load transient change,which has good robustness,and reduces the sensitivity of the parameters.