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A method and system for online monitoring of igbt module health status

A healthy state, bonding wire technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve the effect of avoiding losses

Active Publication Date: 2021-05-28
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] No matter what the failure mode is, the manifestation of its potential failure is different from that of a single tube, which becomes a blind spot for online monitoring of health status

Method used

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  • A method and system for online monitoring of igbt module health status
  • A method and system for online monitoring of igbt module health status
  • A method and system for online monitoring of igbt module health status

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0055] Such as figure 1 Shown is a schematic flow chart of a method provided by an embodiment of the present invention, in figure 1 The method shown includes the following steps:

[0056] S1: Determine the abnormal IGBT module according to the collector current value of each IGBT module in the parallel IGBT module;

[0057] In the embodiment of the present invention, after all the current val...

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Abstract

The invention discloses a method and system for on-line monitoring of the health state of an IGBT module, belonging to the field of IGBT state monitoring. In order to overcome the fact that the existing IGBT module health state cannot be monitored in real time, the method of the invention includes: using a current sensor to measure each IGBT module Collector current; substituting the collected current value into the simulation model to obtain the current unbalance rate; according to the current unbalance rate and temperature, the failure module is located to achieve the purpose of monitoring the health status of the IGBT. The implementation of the invention is simple, the monitoring precision is high, especially the monitoring sensitivity for the falling off of the bonding wire inside the module is high, the real-time performance is good, and the health state of the IGBT can be monitored online.

Description

technical field [0001] The invention belongs to the field of IGBT state monitoring, and more specifically relates to a method and system for online monitoring of IGBT health state based on collector current unbalance rate. Background technique [0002] Power electronic devices have become one of the key components in various devices, and these devices are mainly composed of insulated gate bipolar transistors (Insulate-Gate Bipolar Transistor, IGBT). For a single IGBT chip, the maximum current it can withstand is 200A. It is far from being able to meet the current requirements for the current level in the power conversion device. If the current continues to rise, you need to connect each module in parallel to form a system, or directly connect each module in parallel. There are still many occasions where IGBT modules are required to be connected in parallel, and they all play a very important role in IGBT parallel applications. It cannot meet the requirements of the rated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26G01R31/00
CPCG01R31/2601G01R31/2608G01R31/00G01R31/2619
Inventor 何怡刚袁伟博时国龙何鎏璐张朝龙杜博伦
Owner WUHAN UNIV
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