V/f MTPA EFFICIENCY IMPROVEMENT TECHNIQUE IN THE V/F OPERATION FOR PERMANENT MAGNET SYNCHRONOUS MOTOR

摘要

The present invention relates to an MTPA control device and method for V/f operation of a permanent magnet synchronous machine, and the MTPA control device for V/f operation of a permanent magnet synchronous machine according to an embodiment of the present invention includes a permanent magnet synchronizer (PMSM: Permanent MTPA control unit that calculates the stator voltage that enables the maximum torque per unit current (MTPA) control of the magnet synchronous motor (MTPA), and changes the stator frequency to prevent synchronous departure due to the load fluctuation of the permanent magnet synchronous machine. It may include a stabilizer. According to the present invention, in the sensorless V/f control operation of the PMSM, MTPA control and stabilization of the drive system can be achieved by estimating d-axis current and load information without a position sensor.