Patent ID: 9209722
Filing Date: 2015-12-08
Classification: H02P

Abstract:
1. An inverter control device comprising: an inverter configured to convert DC power inputted from a DC power supply into AC power and supply the AC power to a motor; a command value calculator configured to calculate a command value for an AC voltage outputted from the inverter, based on a detection value for an AC current; a phase compensator configured to compensate for a phase of the command value or the detection value; an inverter controller configured to control the inverter, based on the command value compensated for by the phase compensator; a motor rotation speed detector configured to detect a rotation speed of the motor; a d-q axes non-interference voltage command value calculator configured to calculate a d-q axes non-interference voltage command value to cancel out interference voltages interfering with each other between d and q axes, and to output the d-q axes non-interference voltage command value to the command value calculator; and a reverse phase compensator configured to compensate for a phase according to the amount of compensation of the phase compensated for by the phase compensator, wherein the phase compensator calculates the amount of phase lead based on the rotation speed and a phase compensation time set in order to obtain a predetermined phase margin, and compensates for a phase based on characteristics inherent in the motor, by the amount of phase lead, and the reverse phase compensator compensates for a phase of the d-q axes non-interference voltage command value by the same amount of compensation as the amount of phase lead in the opposite direction to the phase compensated for by the phase compensator.