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High power IGBT module operation junction temperature on-line detection system and detection method thereof

A detection system and junction temperature technology, applied in the application of thermometers, thermometers, measuring electricity, etc., can solve the problems of feasibility and universal structure and process characteristics, so as to make up for universal limitations, high precision and real-time sexual effect

Active Publication Date: 2016-08-31
ZHEJIANG UNIV
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Problems solved by technology

However, the feasibility and universality of this type of method in actual industrial applications are often affected by the structure and process characteristics of the device itself.

Method used

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  • High power IGBT module operation junction temperature on-line detection system and detection method thereof
  • High power IGBT module operation junction temperature on-line detection system and detection method thereof
  • High power IGBT module operation junction temperature on-line detection system and detection method thereof

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Embodiment Construction

[0049] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] figure 1 It is a schematic diagram of the junction temperature test platform for the IGBT module based on the clamped inductive load half-bridge topology. The whole test platform mainly includes high-power IGBT module, freewheeling diode module D, DC voltage source V, bus capacitor C, load inductance L, drive unit, temperature control unit, sampling unit and junction temperature detection unit, among which: DC voltage source V The anode of the load inductance L is connected to one end of the bus capacitor C, one end of the load inductance L and the cathode of the freewheeling diode module D, and the other end of the load inductance L is connected to the anode of the freewheeling diode module D and the collector terminal of the IGBT module, and the ...

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Abstract

The invention discloses a high power IGBT module operation junction temperature on-line detection system and a detection method thereof. The system utilizes the largest collector current droop rate of an IGBT module with approximately linear negative temperature dependency as a device junction temperature sensing parameter, and based on the Kelvin emitter packaging concept of a current mainstream high power IGBT module, converts largest collector current change information into induced voltage information on device internal stray inductance in a turn-off process of the IGBT module. The system does not need extra high voltage passive auxiliary elements, starts capturing the induced voltage caused by the collector current change rate of the IGBT module when a driving circuit sends a turn-off signal, extracts a peak value, and possesses higher precision and instantaneity.

Description

technical field [0001] The invention belongs to the technical field of detection of power electronic devices, and in particular relates to an online detection system and a detection method thereof for the running junction temperature of a high-power IGBT module based on the maximum collector current drop rate. Background technique [0002] In recent years, large-capacity fully-controlled power devices represented by IGBTs have developed rapidly and gradually become mainstream devices in high-power converter systems. According to relevant research reports, power devices are the main fatigue failure components in converter systems, and about 55% of power device failures are caused by temperature factors. Therefore, in order to avoid severe performance degradation or even catastrophic damage of the IGBT module, the maximum operating junction temperature and junction temperature fluctuation of the IGBT module should be closely monitored. Specifically, the thermal breakdown fail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00G01R31/26
CPCG01K13/00G01R31/2619
Inventor 李武华陈玉香罗浩泽王祥周宇何湘宁
Owner ZHEJIANG UNIV
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