Life acceleration model creation method and device and life assessment method

A technology to accelerate model and life, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problems of less failure sample data, shortened test time, and difficult data statistics methods, and achieve reliable life evaluation results. Actual needs, the effect of shortening the test time
CN107944211AInactive Publication Date: 2018-04-20HUBEI UNIV OF ARTS & SCI
3 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUBEI UNIV OF ARTS & SCI
Publication Date
2018-04-20
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Embodiments of the invention provide a life acceleration model creation method and device and a life assessment method. The life acceleration model creation method comprises the following steps of: selecting a preset quantity of test sample sets; for each test sample set, obtaining a life data set, under a double-stress level, of each test sample in the test sample set; and establishing a life acceleration model according to each piece of life data in the life data sets and a preset degradation track. According to the life acceleration model creation method, life data of test samples under thedouble-stress level formed by temperature stress and vibration stress is comprehensively considered, so that the established life acceleration model is closer to practical working condition, the practical demands are satisfied and the test time can be effectively shortened at the same time.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to the technical field of failure prediction of pure electric vehicle motor controllers, in particular to a method for creating a life acceleration model, a device and a life evaluation method. Background technique

[0002] With the continuous development of electric vehicle technology, people's demand for the control function of pure electric vehicle motors continues to increase, resulting in an increasingly complex structure of motor controllers. As the core component of the motor controller, the IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) module has become particularly important in its reliability. Existing methods for reliability analysis of IGBT modules are mainly divided into two categories, namely reliability analysis based on field data statistics method and reliability analysis based on accelerated life test.

[0003] Among them, the reliability analysis based on the on-site data s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More