| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a small power conversion device that reduces the number of component parts, constituting a multiple-level power-converting device and that has less power loss. <P>SOLUTION: In this power-converting device, connection units, in which a plurality of switching devices comprising IGBTs and diodes connected inverse parallel are connected in series, are connected to both ends of two DC voltage source connected in series. The connection point of the series connection of the switching devices comprising IGBTs and diodes connected inverse parallel is used as an AC output terminal. Furthermore, two switching elements, having backward breakdown strength voltage are connected in reverse parallel, and its one end is connected to an intermediate terminal of the DC voltage, and the other end connected to the AC output terminal. <P>COPYRIGHT: (C)2007,JPO&INPIT |
