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Method for predicting service life of IGBT module of traction transmission system of metro vehicle

A vehicle traction and transmission system technology, which is applied in the field of IGBT module life prediction of subway vehicle traction transmission system, can solve the problems of IGBT module life prediction and other problems, and achieve the effects of reducing economic losses, preventing failures, and reducing safety risks

Inactive Publication Date: 2019-11-29
重庆中涪科瑞工业技术研究院有限公司
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Problems solved by technology

However, at present, there is no technology to predict the life of IGBT modules in the traction drive system of subway vehicles

Method used

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  • Method for predicting service life of IGBT module of traction transmission system of metro vehicle
  • Method for predicting service life of IGBT module of traction transmission system of metro vehicle
  • Method for predicting service life of IGBT module of traction transmission system of metro vehicle

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] Reference attached figure 1 , a subway vehicle traction drive system IGBT module life prediction method, comprising the following steps:

[0049] Step 1. Establish a traction drive system IGBT loss estimation model according to the traction level / braking level of the subway vehicle and the motor speed n;

[0050] Step 2, based on the Foster equivalent thermal network model and the IGBT loss, an estimation model of the IGBT junction temperature of the traction drive system is established;

[0051] Step 3: Est...

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Abstract

The invention relates to the field of power electronic reliability, in particular to a method for predicting the service life of an IGBT module of a traction transmission system of a metro vehicle. The method comprises the following steps of 1, building a traction transmission system IGBT loss estimation model according to the traction level / the braking level and the motor speed n of the metro vehicle; 2, building a traction transmission system IGBT junction temperature estimation model on the basis of a Foster equivalent thermal network model and IGBT loss; and 3, building a traction transmission system IGBT life prediction model based on a rain-flow counting method and a Miner linear damage accumulation theory. According to the actual traction level / braking level and motor speed n of themetro vehicle, the IGBT loss is obtained by a lookup method to predict the service life of the IGBT module; and the accumulated damage degree of the IGBT module can be effectively calculated and theservice life of the IGBT module can be predicted, so that the damage early warning can be carried out on the IGBT module, the occurrence of faults is effectively prevented, the safety risk is reduced,and the economic loss is reduced.

Description

technical field [0001] The invention relates to the field of power electronics reliability, in particular to a method for predicting the life of an IGBT module in a traction drive system of a subway vehicle. Background technique [0002] With the increase of the operating mileage of urban rail transit, the probability of failure of components on the vehicle is also increasing, and due to the high degree of integration between equipment on urban rail vehicles, when a component fails, it is likely to Cause a larger chain reaction, which will seriously threaten the safety of train operation. The traction drive system is a key subsystem of a metro vehicle, and its main functions are composed of power electronic systems. In power electronic systems, IGBT is one of the most vulnerable devices. However, at present, there is no technology to predict the life of IGBT modules in the traction drive system of subway vehicles. Contents of the invention [0003] The purpose of the pr...

Claims

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Application Information

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IPC IPC(8): G01R31/26
CPCG01R31/2601G01R31/2642
Inventor 方晓春林帅
Owner 重庆中涪科瑞工业技术研究院有限公司
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