Method for determining the absolute rotor position of in field controlled synchronous machines and device for carrying out this method

摘要

The rotor position detection system provides the absolute rotor position from the estimated angular position of the rotor, with the corresponding torque component set to zero and the flux component set to a value above zero, so that the rotor is displaced into the estimated position upon a disparity between the estimated position and the actual position. The rotation rate for the latter movement of the rotor is evaluated, to provide a regulation value for providing a correction angle, allowing the estimated rotor angular position to be corrected to provide the actual angular position.