一种新型的内置式永磁同步电机无位置传感器控制策略

针对内置式永磁同步电机(IPMSM)在低速域运行时模型参考自适应观测器对电机参数变化敏感、位置检测精度低以及鲁棒性差等缺点,提出了通过利用电机本体的参考模型和相应可调模型的差值构造滑模面,取代了传统模型参考自适应观测器中采用PI调节器作为自适应机构的做法,并且采用模糊控制器自适应调整滑模增益以抑制滑模运动的抖振。在MATLAB/Simulink环境下搭建了仿真模型。仿真表明:在外部扰动以及电机参数变化时,估计转速和转子位置均能跟踪到实际的转速和转子位置。

An Improved Sensorless Control Strategy for Interior PermanentMagnet Synchronous Motor

Aiming at the shortcomings of the traditional model reference adaptive observer in the lowspeed range of interior permanent magnet synchronous motor, including the sensitivity to changes in motor parameters, low accuracy of position detection and poor robustness, an improved sensorless control strategy was presented. Instead of using PI regulators as adaptive mechanisms in traditional model reference adaptive observers, a construction of the sliding surface by using the difference between the reference model of the motor body and the corresponding adjustable model was proposed, and the fuzzy controller was used to adjust the sliding gain adaptively to suppress the chattering of the sliding motion. The simulation model was built in the MATLAB/Simulink environment. The simulation results showed that both the estimated speed and the estimated rotor position could track the actual speed and rotor position when the external disturbance and the motor parameters changed, indicating the validity of the proposed method.