基于级联式变频器的全阶磁链观测器转速估算

The Full-order Observer Speed Estimation System Based on the Cascaded High Voltage Inverter

针对级联式高压变频器的拓扑特点,研究一种基于转子磁链自适应观测器的异步电机无速度传感器矢量控制系统。该方案依据李雅普诺夫理论得出观测器稳定的充分条件,合理构建了自适应律,再以小信号模型推导出满足系统稳定的新型复合反馈矩阵,该矩阵同时具备低速稳定性和中高速抗扰性。仿真和实验表明,该转速估算方案可以准确估算电机的转速和转子磁链,实现了无速度传感器的高精度和高性能控制。

According to the characteristics of cascaded high voltage inverter, a speed sensorless vector control system for induction motor based on rotor flux adaptive observer is researched.According to the Lyapunov stability theory,the speed adaptive law is constructed rationally.And a novel compound feedback matrix both have stability and anti-interference is proposed, which guarantees the stability of the observer.The simulation and experiment show that the speed estimation scheme can accurately estimate the motor speed and magnetic.It can realize the high precision and high performance control of the sensodess sensor.