A three-phase AC control apparatus includes: an equal duty sensing circuit; and a PWM signal control circuit. The equal duty sensing circuit senses whether any two of a U-phase, a V-phase, and a W-phase of a three-phase AC current have an equal duty value. The PWM signal control circuit outputs, when it is sensed that any two of the U-phase, the V-phase, and the W-phase of the three-phase AC current have the equal duty value, a control signal that shifts a timing of start and a timing of stop of one of the two phases having the equal duty value.