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Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/193720
Kind Code:
A1
Abstract:
Provided is a power conversion device that makes it possible to highly accurately detect the temperature of an IGBT or other semiconductor switching element without increasing device size or cost. This power conversion device is provided with a main circuit unit for carrying out power conversion by turning semiconductor switching elements (3a-3f) on and off and a temperature determination unit (10, 11, 12, 13, 14) for determining the temperatures of the semiconductor switching elements on the basis of the frequency characteristic of the current flowing through the main circuit unit.

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Inventors:
SAKURAI NAOKI (JP)
OGAWA TAKASHI (JP)
Application Number:
PCT/JP2018/007271
Publication Date:
October 25, 2018
Filing Date:
February 27, 2018
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
G01K7/00; H02M1/00; H02M7/48
Foreign References:
JP2015206734A2015-11-19
JPH0556553A1993-03-05
JP2009168527A2009-07-30
JP2008125157A2008-05-29
JP2012005278A2012-01-05
JP2017123704A2017-07-13
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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