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1. (WO2001031771) ELECTRIC POWER CONVERTER

Pub. No.:    WO/2001/031771    International Application No.:    PCT/JP1999/005941
Publication Date: Fri May 04 01:59:59 CEST 2001 International Filing Date: Thu Oct 28 01:59:59 CEST 1999
IPC: H02M 7/48
Applicants: HITACHI, LTD.

KOYANAGI, Asako

NAKATA, Kiyoshi

ITO, Satoru

INARIDA, Satoru

HISADA, Shoichi

Inventors: KOYANAGI, Asako

NAKATA, Kiyoshi

ITO, Satoru

INARIDA, Satoru

HISADA, Shoichi

Title: ELECTRIC POWER CONVERTER
Abstract:
A three-level electric power converter that enables the reduction of the inductance of a wiring that connects dc smoothing capacitors with an inverter section to be realized by a simple arrangement, characterized by comprising a plurality of series-connected smoothing capacitors, and a plurality of series-connected switching elements, the arrangement being such that a first smoothing capacitor among the plurality of smoothing capacitors has its terminals disposed closest to a first switching element among the plurality of switching elements and a second smoothing capacitor among the plurality of smoothing capacitors has its terminals disposed closest to a fourth switching element among the plurality of switching elements, parallel flat plates being used for connection so as to ensure that commutation paths are close to each other when the elements are turned off.