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A Lifetime Evaluation Method of igbt Power Module Based on Real-time Online Algorithm

A technology for power module and life evaluation, applied in computing, computer-aided design, instrument, etc., can solve the problems of duty cycle and environmental differences, and achieve the effect of reliable results, high efficiency and low cost

Active Publication Date: 2022-05-17
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Description
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Problems solved by technology

[0004] However, this traditional forecasting method for power electronic components and power modules is not suitable for the hybrid electric vehicle and full electric vehicle industry, because the operating cycle of the vehicle varies greatly in terms of driving style, duty cycle and environment

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  • A Lifetime Evaluation Method of igbt Power Module Based on Real-time Online Algorithm
  • A Lifetime Evaluation Method of igbt Power Module Based on Real-time Online Algorithm
  • A Lifetime Evaluation Method of igbt Power Module Based on Real-time Online Algorithm

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Embodiment Construction

[0022] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 As shown, a real-time online algorithm-based life evaluation method for IGBT power modules includes the following steps:

[0024] Step 1: Establish a cycle model for IGBT power module failures.

[0025] It is known that the common failure mode classification of IGBT power modules involves two categories, one is bond wire detachment, and the other is stress cracks in the solder connecting various parts of the IGBT module.

[0026] When a device experiences temperature changes, parts expand or contract, and because of the different rates at which this change occurs, stresses develop in the solder that joins the parts together. These stresses can cause cracks early in the module's operation. Crack reduction ...

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Abstract

The invention discloses a method for evaluating the life of an IGBT power module based on a real-time online algorithm, which includes the following steps: Step 1: Establish a cycle model of IGBT power module failures; Step 2: Estimate the result of the IGBT power module in each working cycle Temperature data; Step 3: Process the junction temperature data with the algorithm of detecting peaks and valleys, and obtain the junction temperature difference and corresponding time; Step 4: Establish a life cycle array about the junction temperature difference and corresponding time, and the value of each cell in the array is The number of occurrences of the specific junction temperature difference and the corresponding time; Step 5: Calculate the life of the IGBT power module based on the cycle model and the life cycle array. The invention can calculate the life of the module in real time during the use of the IGBT module, does not need additional sensors, has low cost, high efficiency and relatively reliable results.

Description

technical field [0001] The invention relates to the technical field of status evaluation of power electronic equipment, in particular to a method for evaluating the life of an IGBT power module based on a real-time online algorithm. Background technique [0002] The use of IGBT power modules is becoming more common in the automotive industry due to the increase in hybrid and fully electric vehicles. In such a market, component reliability is of paramount importance, and vehicle manufacturers put a lot of effort into diagnosis and prognosis. Diagnostic systems that run on the vehicle in real time to determine when a component is failing, these systems warn the driver before a failure occurs so the vehicle can be repaired and the component can be replaced without hassle to the failure driver of the vehicle. [0003] These prognostic systems are common in today's vehicles, but there are no similar predictive methods for power electronics components. The traditional method fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/367G06F119/04G06F119/08
Inventor 徐攀腾朱博宋述波李建勋谷裕杨学广樊友平
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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