Three-level power converting apparatus

Details Three-level power converting apparatus Three-level power converting apparatus

2011-07-12

2011-07-12

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

With cooling means

C363S125000, C361S688000

Reexamination Certificate

active

07978488

ABSTRACT:
Each phase of a three-level power converting apparatus is configured by a single unit, and four switching devices (1u-4u) and two diodes (9u,10u) provided in each unit are arranged along a flow direction of cooling air on a heat sink (15) of a cooling device with long sides of the switching devices (1u-4u) and the diodes (9u,10u) oriented perpendicular to the flow direction of the cooling air. The first and second diodes (9u,10u) are arranged in a central area of the heat sink (15), whereas the second switching device (2u) and the third switching device (3u) with high heat generation loss are arranged in a distributed fashion to sandwich a group of diodes in the central area in between.

REFERENCES:
patent: 5801936 (1998-09-01), Mori et al.
patent: 6272028 (2001-08-01), Satoh et al.
patent: 6768193 (2004-07-01), Nakamura et al.
patent: 2003/0090873 (2003-05-01), Ohkouchi
patent: 2005/0111246 (2005-05-01), Lai et al.
patent: 10-42573 (1998-02-01), None
patent: 11-89249 (1999-03-01), None
patent: 2003-79162 (2003-03-01), None
Extended European Search Report dated Nov. 29, 2010 in European Application No. 06731430.
PCT/ISA/210 and PCT/ISA/237.

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