| 摘要 |
A power conversion device, which outputs an alternating current voltage corresponding to an output voltage command, includes a direct current power source 1, an alternating current power source 30, an inverter 40, a filter 5 which smooths an output voltage, and an inverter control section 80 for controlling the inverter. The inverter control section 80 commands a carrier signal Sc of a first frequency f1 when on a first condition that a voltage Vr of the alternating current power source is smaller than an output voltage command V*, and that the difference between the voltage Vr and the output voltage command V* is smaller than a predetermined value. Also, the inverter control section 80 commands a carrier signal Sc of a second frequency f2 higher than the first frequency f1 when on a second condition that the voltage Vr of the alternating current power source is smaller than the output voltage command V*, and that the difference between the voltage Vr and the output voltage command V* is larger than the predetermined value. |
