Patent ID: 7518328
Filing Date: 2009-04-14
Classification: H02P

Abstract:
1. A method for the commutation of electromechanical, commutatorless actuators, more particularly of permanent magnet motors and reluctance motors, having a rotor and a stator including at least one stator winding (W 1 , W 2 ) that is/are operated with a constant current (I), wherein a reference constant current is applied to at least one winding (W a stationary state is awaited in which the rotor is at standstill, a value that represents the voltage applied to the winding of the actuator in the stationary state is determined as the reference commutation value x and in that the commutation is effected a predetermined time difference after the moment T, which time difference is greater than or equal to zero and is chosen such that essentially no polarity change of the actuator torque occurs.