Speed identification for sensorless vector control based on magnet-excited voltage component

This paper proposes a novel MRAS (model reference adaptive system) speed identification method of induction motor on the basis of magnet-excited voltage component. Compared with other methods, the output of the adjustable model in the method proposed can be measured directly rather than calculating from the motor´s model, so that it has lesser sensitivity to the motor´s parameters. The result of simulation and experiment shows that this method has an excellent performance, both dynamic and static