| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent breakage of all DC-connected switching elements so as to prevent the breakage from developing into a serious accident. <P>SOLUTION: A power converter has a following configuration. A DC voltage source is voltage-divided by two or more smoothing capacitors connected in series. A switching element group of switching arms of two or more phases is ON/OFF controlled so as to obtain an AC output voltage having potential of three or more levels based on the divided DC voltage by the smoothing capacitors. The power converter is configured by using packages (PC1, PC3) respectively in which one switching element constituting the switching element group and one clamp diode for setting clamp potential are sealed in the same one package, and a package (PC2) in which a plurality of switching elements constituting the switching element group are sealed in the same package. <P>COPYRIGHT: (C)2010,JPO&INPIT |
