Self-identification of permanent magnet synchronous motor inductance for efficient sensorless control

The method of self-identification of permanent magnet synchronous motor inductances for efficient sensorless control has been proposed. The application of developed method allows us to improve the efficiency of motor. The method is based on automatic measurement of motor current time derivative for two positions of rotor. The algorithm of inductance estimation, which uses the obtained measurement data, is developed and analyzed. The results of experimental investigation are presented.