永磁同步电机全速域无传感器复合控制策略

Sensorless Composite Control Strategy for Full-Speed Range of Permanent Magnet Synchronous Motor

为解决单一的永磁同步电机无位置传感器控制策略在特定转速区间控制效果不佳的问题,提出一种新的复合策略以实现全速域高性能控制。在零、低速段,采用改进型脉振高频信号注入法,由两个串联的广义积分器代替数字滤波器,避免影响系统性能;在中高速段,采用模型参考自适应法,通过设计电机参数自适应系统提高系统鲁棒性;最后,通过采用加权平均法,高效实现两种控制策略之间的切换。经过MATLAB/Simulink验证,该复合控制策略使永磁同步电机在各速度区间范围内均具有优良的估算精度和动态响应性能。

In order to solve the issue that the single sensorless control approach of permanent magnet synchronous motor has poor control effect in a specific speed range,a new composite strategy was proposed to achieve high-performance control in the full speed range.Improved pulsed high-frequency signal injection technology was used for low-speed segments,and two generalized integrators connected in series replace the digital filter to avoid affecting the system performance.The model reference adaptive method was employed to augment the system′s robustness in the medium and high speed sections,through the construction of motor parameter adaptive system.Finally,by adopting the weighted average method,a transition between the two control strategies can be effectively achieved.The composite control approach,verified by MATLAB/Simulink,ensures excellent estimation accuracy and dynamic response performance for permanent magnet synchronous motors throughout the entire speed range.