新信息序列的扩展kalman滤波器的异步电动机无速度传感器的设计

An New Information Series Approach of Estimation of Speed Based on Extended-Kalman Filter for Induction Motor

文章用一种新的改进的扩展Kalman滤波器的方法 。

A vector control of an induction motor by an estimation speed using an improved extended Kalman filter is proposed. With this method, the states are composed of stator current and rotor flux. The rotor speed is regarded as a parameter, and the composite states consist of the original states and the rotor speed. The extended Kalman filter is employed to identify the speed of an induction motor and rotor flux based on the measured quantities such as stator currents and dc link voltage. The estimated speed is used for vector control and overall speed control. Since the current control is performed at a synchronous rotating reference frame, the estimated speed information is also used for the reference frame transformation of the current controller. Computer simulations and experiments of the speed control have been carried out to test the usefulness of the speed estimation algorithm. The experimental results show that the performance of the speed estimation is very good.