POWER CONVERTER - HITACHI LTD

Title:

POWER CONVERTER

Document Type and Number:

WIPO Patent Application WO/2011/111097

Kind Code:

A1

Abstract:

Disclosed is a power converter which is satisfactory in terms of safety, implements control for the flow of a constant current in a specified switching element, more accurately determines the lifetime of a switching element, and can reduce the number of temperature detectors. The power converter is provided with a mechanism which causes a braking device to operate or which verifies that a braking mechanism is operating. The power converter makes current flow in the d axis and the q axis of a rotational coordinate system, within the range of the braking torque of the braking mechanism, and passes the desired current to the desired element. Furthermore, temperature detectors are attached only in chips in sections which readily develop cracks in the upper solder layer or peeling in the wire bonding, and in chips which readily develop cracks in the lower solder layer. An accurate lifetime evaluation of a semiconductor module is therefore possible even with few temperature detectors.

Inventors:

AYANO HIDEKI (JP)
ISHIKAWA KATSUMI (JP)
OGAWA KAZUTOSHI (JP)
KOMINAMI TSUTOMU (JP)
KUNIHIRO MAMI (JP)

Application Number:

PCT/JP2010/001677

Publication Date:

September 15, 2011

Filing Date:

March 10, 2010

Export Citation:

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Assignee:

HITACHI LTD (JP)
AYANO HIDEKI (JP)
ISHIKAWA KATSUMI (JP)
OGAWA KAZUTOSHI (JP)
KOMINAMI TSUTOMU (JP)
KUNIHIRO MAMI (JP)

International Classes:

H02M7/48; H02P29/00; H02P29/40; H02P29/60; H02P29/68

Foreign References:

JP2009225541A	2009-10-01
JP2008271703A	2008-11-06
JP2003009541A	2003-01-10

Other References: