| 摘要 |
PROBLEM TO BE SOLVED: To achieve both suppression of energy efficiency deterioration and suppression of noise due to control of an inverter by overmodulation control system.SOLUTION: When the control system of an inverter becomes overmodulation control system during prohibition of the step-up operation by a step-up converter (S110), the step-up operation by a step-up converter is not started until the duration t of overmodulation is equal to or exceeds a predetermined time t1 (S130), and when the duration t of overmodulation is equal to or exceeds a predetermined time t1, step-up operation by the step-up converter is started so that the control system of the inverter becomes a sine wave control system (S130, 140). |
