The authors introduce a new method for simulating phase-controlled induction motors. This method consists of utilizing the general model of the motor, referred to the equivalent two-phase machine, and of applying suitable input signals when the current is switched-off in one or more windings.

The measurement of the rotation speed is an important issue in closed-loop industrial drives. The motor speed is often calculated by a derivative operation of the position measure obtained by an electromagnetic resolver. As a consequence, especially at the lowest speeds, the noise overlapped to...