| 摘要 |
<P>PROBLEM TO BE SOLVED: To initially charge a single-phase inverter with a rush current suppressed without equipping a dedicated initial charge circuit in a gradient control inverter obtained by connecting a single-phase inverter in series with each phase of a three-phase inverter. <P>SOLUTION: A gradient control power conversion apparatus is obtained by connecting a single-phase inverter in series with each phase of AC output line of a three-phase, three-level inverter. The three-phase, three-level inverter 10 outputs a pulse voltage to charge the DC capacitor 25 of each single-phase inverter with an output current flowing through single-phase inverters 20A, 20B and an output filter 5. The pulse width and pulse period of the pulse voltage output by the three-phase, three-level inverter are so controlled that the output current does not become an overcurrent. <P>COPYRIGHT: (C)2011,JPO&INPIT |
