| 摘要 |
A power converter having a DC power source and neutral point clamped inverters connected in common to the DC power source, to convert DC power from the DC power source into AC power and supply the AC power from the inverters to a load. The power converter includes a first voltage reference generating unit for generating a first voltage reference, and a phase difference determining unit for determining a phase difference between the inverters based on a number of the inverters and a number of phases per the inverter. The power converter further includes a second voltage reference generating unit for generating a second voltage reference based on the first voltage reference from the first voltage reference generating unit and the phase difference from the phase difference determining unit, and a comparing unit for comparing the voltage references with carrier signals repectively and for generating gate signals based on the comparison result to the inverters.
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