The motor control device and the modulation wave command creating the pwm inverter
2005
A modulated wave signal creation method for a PWM inverter device controlled by a pulse width modulation signal obtained by comparing the modulated wave signal and the carrier wave of the voltage command, the motor control device and its PWM capable of enlarging the voltage output to provide a modulated wave signal creation method of the inverter. It includes a modulated wave limit value calculating section 105 a modulation wave control unit 4, or less than the maximum value of the carrier wave and the modulated wave limit value calculating a modulated wave limit value 14 an upper limit value in the greater range than the minimum value of the carrier wave modulated wave create in section 105, and the modulated wave instruction 13 of a plurality of phases by using the modulated wave limit value 14 so as to modify the modulation wave control unit 4.
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