Speed Sensorless Control Design Method for Induction Motor Based on Current Error Weighted Speed Adaptive Law
Aiming at the instability problem in the speed sensorless control of induction motor operation at low speed,this paper proposes a speed sensorless control design method for the induction motor based on current error weighted speed adaptive law.Firstly,the small signal linearized model analysis is used to reveal the relationship between rotor flux error and magnetizing current error,thus obtaining a new speed adaptive law.Then the open-loop transfer function of the proposed speed adaptive law is derived,and the conditions for the stable operation of the system are obtained by using the Routh stability criterion.With the help of MATLAB software,the value of a weighting coefficient is obtained.Finally,the feedback matrix is introduced into the system with the improved speed adaptive law to analyze the pole distribution of the proposed method.The experimental analysis shows that the proposed method has better stability and superiority.
NETL
NSTL
万方数据
维普
