The present invention relates to an unbalanced power supply voltage control device and method of a voltage-type PWM converter, and in particular, to compensate for the unbalance of the AC three-phase power supply voltage applied to the voltage-type PWM converter according to the state of the power supply voltage to improve the power factor of the power supply voltage. The present invention relates to an unbalanced power supply voltage control device and method for a voltage-type PWM converter.;The unbalanced power supply voltage control device of the voltage-type PWM converter of the present invention is a current observation means, the reference load voltage ( ) And the actual load voltage ( ) 'S car - ), A voltage control means for correcting () by a control gain, a back-electromotive force compensation power supply voltage control means for calculating a back electromotive force compensation control voltage using the line voltage of the AC three-phase power supply, and the voltage control means and the power supply voltage control for the back electromotive force compensation Current control means for calculating an unbalanced power supply voltage compensation control voltage component using the output of the means; and space vector PWM means for PWMing the output of the current control means to calculate a gate voltage for controlling 6 bridge power switches. It is done.
展开▼
