Title:
SEMICONDUCTOR CHIP TEMPERATURE ESTIMATION DEVICE AND OVERHEAT PROTECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/091852
Kind Code:
A1
Abstract:
A semiconductor chip temperature estimation device for estimating the temperature of a semiconductor chip built in together with a thermistor in a semiconductor module, wherein are provided a loss calculating unit (2) for estimating a loss of the semiconductor chip by computation using the current and switching frequency of a semiconductor switching element in the semiconductor chip, etc., a storage unit (3A) in which is stored in advance a correlation between the loss of the semiconductor chip and a temperature increase which is the difference between a temperature detection value from the thermistor and the temperature of a cooling element such as a cooler for cooling the semiconductor module, a means for estimating the temperature increase of the thermistor by computation using the correlation and the estimated value of the loss of the semiconductor chip outputted from the loss calculating unit (2), and an addition/subtraction means for subtracting an estimated value of the thermistor temperature increase from the temperature detection value and estimating a cooling element temperature, the temperature of the semiconductor chip being estimated using the estimated temperature of the cooling element as a basis temperature. There is thereby no need for a thermistor for detecting the cooling element temperature, and the size and cost of a power converter can be reduced.
Inventors:
IMAKIIRE AKIHIRO (JP)
ODAKA AKIHIRO (JP)
ADACHI SHINICHIRO (JP)
ODAKA AKIHIRO (JP)
ADACHI SHINICHIRO (JP)
Application Number:
PCT/JP2013/080409
Publication Date:
June 19, 2014
Filing Date:
November 11, 2013
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
G01K7/00; H01L21/822; H01L27/04; H02H6/00; H02H7/12; H02H7/122; H02M1/00; H02M7/48
Foreign References:
| JP2011135713A | 2011-07-07 | |||
| JP2012075234A | 2012-04-12 | |||
| JP2008151739A | 2008-07-03 | |||
| JP2001318008A | 2001-11-16 | |||
| JPH0375303B2 | 1991-11-29 | |||
| JP2005124387A | 2005-05-12 |
Other References:
See also references of EP 2933618A4
Attorney, Agent or Firm:
MORITA YUICHI (JP)
Morita Yuichi (JP)
Morita Yuichi (JP)
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