Reluctance identifying method for synchronous motor, involves detecting momentary current during change of adjustment of motor axle, and determining reluctance of synchronous motor using detected momentary current

摘要

The method involves supplying direct current as rising current to a synchronous motor (10). Adjustment of a motor axle (20) of the synchronous motor is monitored. Momentary current is detected during change of adjustment of the motor axle, which is detected based on a signal obtained by a transmitter (34) that is assigned to the motor axle or from behavior of voltage that is induced in the synchronous motor. Reluctance of the synchronous motor is determined using the detected momentary current. An independent claim is also included for a device for identifying reluctance of a synchronous motor, comprising a current feed unit.