Patent Number: 8,792,261

Title: Power conversion device

Abstract: A power conversion device connected with a three-phase power system through a transformer, including unit converters cascade-connected so that reactors are unnecessary, and volume and weight are reduced. The secondary winding of the transformer is an open winding having six terminals. A first converter group, includes a circuit which has three converter arms, which are star-connected, connected to three of the terminals of the secondary winding. A second converter group, having three different converter arms which are star-connected, is connected to three other terminals of the secondary winding. A neutral point (the point where the star connection is made) of the first converter group, and a neutral point of the second converter group are made to be the output terminals of the power conversion device.

Inventors: Inoue; Shigenori (Hitachi, JP), Katoh; Shuji (Hitachiota, JP), Narushima; Jun (Hitachi, JP), Kato; Tetsuya (Hitachiota, JP)

Assignee: Hitachi, Ltd.

International Classification: H02M 7/17 (20060101)

Expiration Date: 7/29/12018