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.