Inverter control apparatus and power conversion apparatus

An inverter control apparatus that controls an inverter having a plurality of semiconductor switching devices and converting DC power into multi-phase AC power by switching the plurality of semiconductor switching devices separately, the apparatus comprising:

• a voltage command generating unit that generates a voltage command corresponding to each phase of the AC power;
• a phase difference calculation unit that calculates respective voltage differences between the voltage commands of each phase;
• a required phase difference calculation unit that calculates a required phase difference, which represents a difference of voltages between the phases of the voltage command required to prevent the semiconductor switching devices from turning on simultaneously in two phases;
• a voltage command correction unit that compares each of the voltage differences calculated by the phase difference calculation unit with the required phase difference calculated by the required phase difference calculation unit, and corrects the voltage command based on the comparison result;
• a carrier wave generating unit that generates a carrier wave;
• and
• a PWM signal generating unit that compares one or more of the voltage commands that have been corrected by the voltage command correction unit with the carrier wave, thereby generating a PWM signal used to control the inverter.