基于MRAS的双三相永磁同步电机无位置传感器控制研究

Position Sensorless Control of Dual Three Phase Permanent Magnet Synchronous Motor Based on MRAS

基于双三相永磁同步电机的矢量空间解耦数学模型,将模型参考自适应算法(model reference adaptive system,MRAS)应用于双三相永磁同步电机的无位置传感器控制。利用波波夫超稳定性理论分析和证明内置式永磁同步电机应用传统的MRAS方案存在一定问题,即取单位矩阵I的线性补偿器,只能在一定转速范围内实现转速辨识。为了使MRAS能够在宽速度范围内有效工作,设计新的线性补偿器,并推导得出新的转速自适应律。通过仿真和实验对所提方法进行验证,结果表明该方法能够实现转子位置和转速的准确辨识,并且具有良好性能。

Based on the vector space decoupling mathematical model of dual three-phase permanent magnet synchronous motor, the model reference adaptive system(MRAS) was applied to the sensorless control of dual three-phase permanent magnet synchronous motor. Using Popov’s hyperstability theory, this paper analyzed and proved that there were some problems in the application of traditional MRAS for interior permanent magnet synchronous motor, and the problem was that the linear compensator with unit matrix I could only realize speed identification within a certain speed range. In order to make MRAS work effectively in a wide speed range, a new linear compensator was designed and a new speed adaptive law was derived. The proposed method was verified by simulation and experiment. The results show that the method can realize the accurate identification of rotor position and speed, and has good performance.