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Device, method and system for testing junction temperature of power module under inversion working condition in real time

A power module, real-time testing technology, applied in the direction of measuring devices, measuring electrical variables, measuring electricity, etc., can solve the problem that the actual junction temperature data of the power module cannot be accurately and intuitively represented, and achieve the effect of ensuring accuracy

Pending Publication Date: 2022-05-13
HUNAN CSR TIMES ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the junction temperature simulation method often needs to be adjusted in combination with specific boundary conditions, and is an idealized and averaged value, it cannot accurately and intuitively characterize the actual junction temperature data of the power module; in engineering applications, it is more desirable to use an intuitive way Obtain the actual junction temperature inside the IGBT power device, so technicians are more inclined to use detection methods than analog algorithms

Method used

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  • Device, method and system for testing junction temperature of power module under inversion working condition in real time
  • Device, method and system for testing junction temperature of power module under inversion working condition in real time
  • Device, method and system for testing junction temperature of power module under inversion working condition in real time

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Embodiment 1

[0057] figure 1 It shows a schematic structural diagram of the device for real-time testing of the junction temperature of the power module under the inverter working condition provided by Embodiment 1 of the present invention, refer to figure 1 It can be seen that the device includes:

[0058] The tested motor controller 1 equipped with a special power module to be tested;

[0059] Working condition control frame 2, which is used to simulate a variety of operating modes for setting inverter working conditions according to control signals from the host computer; and

[0060] A thermal imager 3, which is used to collect the infrared radiation energy data emitted by the special power module to be tested, and generate and output a corresponding junction temperature distribution cloud map according to it;

[0061] The tested motor controller 1 includes:

[0062] One or more power modules, wherein at least one power module is a specially-made power module 101 to be tested after ...

Embodiment 2

[0092] Based on the device described in any one or more of the above embodiments, the present invention also provides a method for real-time testing of the junction temperature of the power module under inverter working conditions, the method includes the following operations:

[0093] Treat the IGBT chip with a cover that meets the set emissivity requirements, and obtain a special power module to be tested for the junction temperature test;

[0094] Assemble the special power module to be tested into the box of the motor controller under test according to the configuration of the above device;

[0095] To start the test, the host computer controls the operation of the motor controller under test and the load dynamometer in the working condition control frame according to the set working condition data and the real-time junction temperature data collected by the thermal imager, so as to simulate the set multiple operating conditions;

[0096] The infrared radiation energy dat...

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Abstract

The invention provides a device, method and system for testing the junction temperature of a power module under an inversion working condition in real time, and the device comprises a tested motor controller which is provided with a specially-made to-be-tested power module, a working condition control rack which is used for simulating the operation of various working conditions according to a control signal, and an infrared radiation energy data collection module which is used for collecting the infrared radiation energy data of the to-be-tested power module and calculating the junction temperature of the to-be-tested power module. The thermal imager is used for generating a junction temperature distribution cloud picture and generating a corresponding junction temperature distribution cloud picture, and the tested motor controller comprises at least one specially-made to-be-tested power module processed by a set scheme; the driving plate and the control plate are assembled according to a set form. When the device is used for testing, the problem of distortion of a junction temperature calculation result caused by an idealized algorithm in an existing simulation method and the defect of limitation of a test object in a detection method can be solved, and the junction temperature of a power module chip can be observed in real time under different inversion working conditions; and reliable data support is provided for control and optimization of a complex system.

Description

technical field [0001] The invention relates to the technical field of power module monitoring and evaluation, in particular to a device, method and system for real-time testing of the junction temperature of a power module under inverter working conditions. Background technique [0002] With the development of modern power electronics technology and the country's strong support and promotion of new energy-related industries, IGBT power modules are widely used in inverters for electric drive vehicle power systems. As more and more power devices are put into use, research on the reliability of power device performance is becoming more and more urgent. Reliable research has shown that about 60% of IGBT device failures are caused by thermal factors, and IGBT chips For every 10°C increase in the actual working temperature of the chip, the probability of failure of the chip will double. Therefore, the exploration of the internal junction temperature of the IGBT power module is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张迪德古强王坚乐林红彭再武
Owner HUNAN CSR TIMES ELECTRIC VEHICLE
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