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Method for directly identifying and judging health state of IGBT (Insulated Gate Bipolar Translator) in electrical equipment

A technology for electrical equipment and health status, which is applied in the direction of measuring electricity, measuring electrical variables, and short-circuit testing, etc., can solve problems such as lack, and achieve the effects of improving confidence, eliminating potential hidden dangers, and improving measurement accuracy and accuracy

Pending Publication Date: 2022-06-28
无锡科微半导体有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the later stage of on-site maintenance, repair or replacement, there is a lack of fast and accurate identification methods

Method used

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  • Method for directly identifying and judging health state of IGBT (Insulated Gate Bipolar Translator) in electrical equipment
  • Method for directly identifying and judging health state of IGBT (Insulated Gate Bipolar Translator) in electrical equipment
  • Method for directly identifying and judging health state of IGBT (Insulated Gate Bipolar Translator) in electrical equipment

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1-2 As shown, a method for directly judging the state of health of an IGBT in an electrical device of the present invention is characterized in that it includes the following steps:

[0027] S1: Start, pre-charge electrical equipment;

[0028] S2: Issue a control command after charging is completed, wait for a delay, and measure multiple times to eliminate interference;

[0029] S3: Record the measured value under each command. According to the method of control instructions, analyze and process each data;

[0030] S4: When a certain value exceeds a certain range of the production record value, or is obviously different from the data of other position devices, or the value is unstable and has a large fluctuation range, it c...

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Abstract

The invention discloses a method for directly identifying and judging the health state of an IGBT (Insulated Gate Bipolar Translator) in electrical equipment, which is characterized by comprising the following steps of: starting to pre-charge the electrical equipment; after charging is completed, a control instruction is sent out, waiting is delayed, and interference is eliminated through multiple times of measurement; and recording a measurement value under each instruction. Analyzing and processing the data according to the mode of the control instruction; when a certain value exceeds a certain range of a production record value, or is obviously different from data of devices at other positions, or the value is unstable and has a large fluctuation range, the device can be judged as a risk device. The invention provides a brand-new identification method, the health state of the power device can be quickly and accurately obtained, meanwhile, the modes of time-sharing detection, grouping detection and circulating detection can be supported, and the health state of the device is screened and identified through the absolute value and the relative difference value.

Description

technical field [0001] The invention belongs to the technical field of power semiconductor devices, and in particular relates to a method for directly identifying the health state of an IGBT in electrical equipment. Background technique [0002] In the 1980s, IGBT devices were invented by combining the respective advantages of MOSFETs and transistors. Since the 1990s, IGBT manufacturing technology has gradually matured, and large-scale commercial applications have begun. At present, IGBT products have covered various voltage levels from 650V to 6500V, especially in high-power applications above 1200V. Its target markets include: motor drives, power equipment, new energy power generation systems, energy storage, power transmission and distribution, etc.; [0003] IGBT is the core device of power conversion equipment, which determines the reliability of the entire system. IGBT not only needs to work under specific voltage, current and junction temperature, but also has stri...

Claims

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Application Information

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IPC IPC(8): G01R31/26G01R31/52
CPCG01R31/2601G01R31/52
Inventor 袁光明张晖刘毅
Owner 无锡科微半导体有限公司
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