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Patent Searching and Data


Title:
REAL-TIME ONLINE PREDICTION METHOD FOR SEMICONDUCTOR POWER DEVICE DYNAMIC JUNCTION TEMPERATURE
Document Type and Number:
WIPO Patent Application WO/2019/063000
Kind Code:
A1
Abstract:
A real-time online prediction method for a semiconductor power device dynamic junction temperature. The method calculates a power device loss in a discretised manner by reusing electrical parameter sampling values necessary for closed-loop control of an original system, and obtains a real-time junction temperature of a power device via online iterative calculation in combination with an optimal fit discretised dynamic thermal resistance model. The present invention has the following advantages: reusing electrical parameter sampling values necessary for closed-loop control of a system as an input, and not adding any extra system hardware circuits and costs; utilising the idea of discretised iterative calculation, saving processor resources to the greatest possible extent, implementing online calculation, and ensuring the real-time nature of a dynamic junction temperature calculation; using an optimal fit discretised dynamic thermal resistance model to perform iterative calculation, and ensuring calculation accuracy at the same time as ensuring the real-time nature of a power device dynamic junction temperature calculation. The present invention satisfies requirements such as protection, lifespan prediction and reliable design, and also meets requirements for actual engineering applications.

Inventors:
YAO TIAN (CN)
YU GUOJUN (CN)
MIAO MAOYU (CN)
XU XIAOJUN (CN)
QIAN WEI (CN)
Application Number:
PCT/CN2018/108960
Publication Date:
April 04, 2019
Filing Date:
September 30, 2018
Export Citation:
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Assignee:
NANJING ESTUN AUTOMATION CO LTD (CN)
International Classes:
G01R31/26
Foreign References:
CN108072821A2018-05-25
CN106610445A2017-05-03
CN103954900A2014-07-30
CN103956887A2014-07-30
CN106199367A2016-12-07
US20160328512A12016-11-10
US20040066837A12004-04-08
Other References:
See also references of EP 3492937A4
Attorney, Agent or Firm:
JIANGSU SUNDY LAW FIRM (CN)
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