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1. (WO2018047229) POWER CONVERSION DEVICE, COOLING STRUCTURE, POWER CONVERSION SYSTEM, AND POWER SUPPLY DEVICE

Pub. No.:    WO/2018/047229    International Application No.:    PCT/JP2016/076150
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Wed Sep 07 01:59:59 CEST 2016
IPC: H02M 7/04
H02M 7/48
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: NORIMATSU Yasuaki
乗松 泰明
KANOUDA Akihiko
叶田 玲彦
MABUCHI Yuuichi
馬淵 雄一
SHIMADA Takae
嶋田 尊衛
KADOTA Mitsuhiro
門田 充弘
KAWAGUCHI Yuki
河口 祐樹
NAKAHARA Mizuki
中原 瑞紀
YONEKAWA Akira
米川 輝
Title: POWER CONVERSION DEVICE, COOLING STRUCTURE, POWER CONVERSION SYSTEM, AND POWER SUPPLY DEVICE
Abstract:
A power conversion device having a power conversion unit comprising a single-phase inverter on a secondary side of a resonant converter having DC input. The single-phase inverter output for a plurality of power conversion units is connected in series to constitute a power conversion unit group. Each phase of a three-phase alternating current is formed using three sets of the power conversion unit groups housed inside a power conversion device case. The plurality of power conversion units constituting the power conversion unit group are arranged along the longitudinal direction of the power conversion device case and the three sets of power conversion unit groups are arranged on an upper level, middle level, and lower level, respectively, in the height direction of the power conversion device case. The power conversion device is characterized by: one end side of the power conversion device case in the longitudinal direction being an output terminal for the three sets of power conversion unit groups; and the terminals of the three sets of power conversion unit groups having a common connection on the other end side of the power conversion device case in the longitudinal direction.