| 摘要 |
<p>An electrical conversion apparatus including a converter (2) and an inverter (4) comprises a capacitor (3) that stores a DC electrical power; a ripple detection unit (8) that detects a ripple of an RMS power that is generated from the inverter (4); a voltage measuring instrument (15) that measures a voltage across the capacitor (3); a DC voltage command generation unit (16) that calculates a command value of the voltage across the capacitor (3) according to a frequency of the AC voltage generated from the inverter (4); and a DC voltage control unit (17) that receives the voltage measured by the voltage measuring instrument (15) and the command value calculated by the DC voltage command generation unit (16), to control the converter (2) so that the voltage across the capacitor (3) becomes the command value, wherein the DC voltage command generation unit (16) makes the command value of the voltage across the capacitor (3) higher than usual, in situations where the voltage across the capacitor (3) is within a predetermined range including a frequency of a ripple component of the voltage across the capacitor (3).</p> |
