Implementalion of speed sensorless direct torque control system based on flux observer;

Reduced order flux observer for induction motors;

A modified voltage model flux observer which is based on the mathematic module of induction motor was presented,and a new speed estimator was proposed based on flux observer method.

Adaptive sliding mode observer for speed-sensorless control of PMSM;

Double sliding mode observers for permanent magnet linear synchronous motor;

Feedback linearization speed-tracking control of linear servo system based on sliding mode observer;

To solve the problem of the chattering phenomena in the conventional SMO(Sliding Mode Observer),a novel SMO was proposed based on the good properties of Kalman filter,where the sat function is adopted to substitute the sign function and the low pass filter was deleted.

An adaptive sliding-mode observer for sensorless vector control of surface permanent magnet(synchronous) motor(SPMSM) is presented.

Residuals were achieved by comparing outputs of sliding-mode observers and sensor signals.

A robust control scheme on the model of surface permanent magnet synchronous motor,composing of a sliding-mode controller and a sliding-mode observer,was presented in this paper.