基于MRAS观测器的无速度传感器永磁同步电机模型预测控制*

摘要

针对三相永磁同步电机驱动系统，提出了一种无速度传感器模型预测转矩控制方法。基于模型参考自适应技术设计了观测器，以精确估算转子速度；为了减小转矩和定子磁链波动、提高系统动态和静态响应特性，采用了模型预测控制策略。仿真结果表明所提方法可以使PMSM驱动系统达到满意的控制效果，从而证明论文控制策略的有效性和正确性。%A sensorless model predictive torque control (MPTC)strategy is proposed for three-phase permanent magnet synchronous motor (PMSM)drive system with MRAS observer.By making use of techniques of MRAS,a MRAS observer is designed to estimate speed.In order to reduce the torque & flux ripples and improve control performance,MPTC strategy is employed. Numerical simulation shows that the proposed MPTC with MRAS observer achieves satisfactory control performance for torque &speed control,and thus validates the feasibility and effectiveness of the proposed scheme.