On-line detection device for measuring junction temperature of IGBT power module based on saturation voltage drop

A detection device and power module technology, which is applied in the direction of measuring devices, measuring heat, and adopting electrical devices, etc., can solve problems such as unsuitable for fully packaged modules, high price, interference, etc.

Active Publication Date: 2017-07-21
BEIJING UNIV OF TECH
View PDF6 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical contact method requires contact measurement and is susceptible to interference from packaging materials (such as silica gel); optical method: not suitable for fully packaged modules, only suitable for research on unsealed modules in the laboratory, an...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • On-line detection device for measuring junction temperature of IGBT power module based on saturation voltage drop
  • On-line detection device for measuring junction temperature of IGBT power module based on saturation voltage drop
  • On-line detection device for measuring junction temperature of IGBT power module based on saturation voltage drop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The specific implementation steps of the present invention will be described in detail below in conjunction with the following examples.

[0027] Such as Figure 7 As shown, it is the implementation flowchart of the IGBT junction temperature detection device provided by the present invention, and the specific implementation steps are divided into: determining V under small current CE with T j The function relationship curve 701 of the IGBT module to be tested; the power cycle experiment 702 with a specific switching time applied to the IGBT module to be tested; the constant small current 703 is applied to the IGBT module to be tested; CE 704; Measure V at the moment of shutdown in the power cycle experiment CE 705.

[0028] Determine V under small current CE with T j When using the thermostat test unit described in 101, put the IGBT module into the thermostat, and set the temperature of the thermostat at 20°C-150°C for 20 minutes until it stabilizes. The gate V o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides an on-line detection device for measuring the junction temperature of an IGBT power module based on saturation voltage drop. According to the device, the voltages VCE of a collector and an emitter under small current are selected as temperature sensitive parameters. The detection device comprises a temperature box experimental unit. A function relationship between saturation voltage drop VCE and junction temperature Tj under the small current is determined; the switching off of high current is controlled through a switch IGBT module under a power cyclic condition; the change of the VCE at the moment when an IGBT to be detected is switched off is monitored; and the change of the VCE is introduced into the function relationship which is obtained in advance, and the change process of the junction temperature Tj can be obtained. With the device adopted, the junction temperature of the IGBT can be detected in real time. According to the device, an overcurrent unit and an overtemperature unit are additionally adopted, and therefore, the IGBT device can be protected in real time through an automatic power-off means, and therefore, the device of the present invention can obtain the junction temperature of the IGBT more simply and quickly than devices which obtain junction temperature through opening covers or changing circuit structures.

Description

technical field [0001] The invention relates to an online detection device for measuring the junction temperature of an IGBT power module based on a saturation voltage drop, belongs to the field of temperature detection devices, and particularly relates to an online detection device for the junction temperature of an IGBT module. Background technique [0002] Insulated gate bipolar transistor (IGBT) is a composite full-control voltage-driven power semiconductor device, which combines the advantages of metal oxide semiconductor field effect transistor (MOSFET) and giant transistor (GTR), with high input impedance, Easy to drive, fast switching speed, low conduction voltage drop, high voltage and high current resistance, etc., making it an ideal power component for high-power power electronic devices, which are repeatedly accelerated in rail transit, aerospace, new energy vehicles, and wind power. It is widely used in the power conversion occasions of deceleration and start / st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01K7/24
CPCG01K7/24
Inventor 安彤赵静毅秦飞别晓锐方超
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap