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A pulse power AC aging test platform and test method

A pulse power and aging test technology, applied in the field of electrical equipment, can solve the problems of difficulty in online extraction of aging characteristics, lack of platforms and methods for AC aging tests, etc., and achieve strong operability

Active Publication Date: 2021-10-26
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] AC aging can better reflect the real aging process of the device, but under AC aging, the device works in a high-frequency switching state, and online extraction of aging characteristics is still a difficult problem worldwide.
In the existing technology, the AC aging of IGBT cannot be effectively measured and evaluated, and there is also a lack of platforms and methods for performing AC aging tests on it.

Method used

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  • A pulse power AC aging test platform and test method
  • A pulse power AC aging test platform and test method
  • A pulse power AC aging test platform and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] A pulse power AC aging test platform, such as figure 1 As shown, it mainly includes the following parts:

[0051] Main circuit: full bridge inverter main circuit and IGBT module drive circuit. Considering that the load is close to a pure inductive load, it is considered to incorporate a buffer capacitor array at the DC voltage input to provide reactive power.

[0052] Measurement circuit: including IGBT module saturation voltage drop measurement circuit and IGBT module junction-case thermal resistance measurement circuit;

[0053] Protection circuit: IGBT overcurrent detection circuit, soft shutdown circuit after fault, system overvoltage protection configuration;

[0054] Signal conditioning circuit: IGBT module shell temperature extraction circuit, saturation voltage drop and thermal resistance information processing circuit;

[0055] On-site digital control, coordination and information processing embedded system with DSP as the core;

[0056] Host computer: PC p...

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PUM

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Abstract

The invention discloses a pulse power AC aging test platform and a test method, which are used for testing the aging condition of the IGBT module under the condition of pulse power and evaluating the life of the IGBT module. The test platform includes the following units: a main circuit unit, It is used to simulate a complete aging cycle; the measurement circuit unit is used to realize the measurement of the saturation voltage drop and junction thermal resistance of the IGBT module; the protection circuit unit is used to protect the test platform accordingly; the information processing unit is used for Control and process various information in the test process; the upper computer is used to receive and display and control various information sent by the information processing unit. The invention realizes the aging test of the IGBT module under the condition of pulse power, completes the measurement of the saturation pressure drop of the IGBT module and the thermal resistance of the junction, and can provide strong support for evaluating the life of the IGBT module.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, relates to an IGBT module, and in particular relates to a pulse power AC aging test platform and a test method. Background technique [0002] IGBT (Insulated Gate Bipolar Transistor), full name Insulated Gate Bipolar Transistor, is the product of the combination of MOSFET and GTR (power transistor). Its three poles are collector (C), emitter (E) and gate (G). [0003] The characteristics of IGBT: the breakdown voltage can reach 1200V, and the maximum saturation current of the collector has exceeded 1500A. The inverter with IGBT as the inverter device has a capacity of more than 250kVA and an operating frequency of up to 20kHz. [0004] As one of the important high-power mainstream devices of power electronics, IGBT has been widely used in household appliances, transportation, power engineering, renewable energy and smart grid and other fields. In industrial applications, such as t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26
CPCG01R31/2601G01R31/2642
Inventor 孙兆龙袁志方刘小虎
Owner NAVAL UNIV OF ENG PLA