Title:
TEMPERATURE INFERENCE DEVICE AND CONVERTER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/244166
Kind Code:
A1
Abstract:
A temperature inference device according to the present invention calculates a junction temperature inference value of a power semiconductor element that is provided in a converter which performs power conversion between AC power of a three-phase AC power source side and DC power of a DC side. Said temperature inference device comprises: an electric current detection unit that detects the value of an electric current flowing through the power semiconductor element; and a junction temperature inference unit that calculates a junction temperature inference value of the power semiconductor element on the basis of the unbalance rate of a three-phase AC power source which is connected to the converter and a provisional junction temperature value which has been calculated on the basis of at least the electric current value detected by the electric current detection unit.
Inventors:
KUROKI WATARU (JP)
Application Number:
PCT/JP2021/019067
Publication Date:
November 24, 2022
Filing Date:
May 19, 2021
Export Citation:
Assignee:
FANUC CORP (JP)
International Classes:
H02M7/12
Domestic Patent References:
| WO2016170584A1 | 2016-10-27 |
Foreign References:
| JP2013201870A | 2013-10-03 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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