Adjustment of PMSM Drive Parameters for Sensorless Vector Control

Methods for adjustment of drive parameters during the change of control modes is presented. The methods are applied to permanent magnet synchronous motor (PMSM) sensorless control with sliding mode observer (SMO). The phase compensation was proposed to optimize rotor position in the speed control mode. This technique is based on the measurement of control current with constant load torque. The validity of the proposed methods is verified experimentally.