A method of detecting the life of a fuse by determining the activation energy of the melt

A melt activation and fuse technology, applied in circuit breaker testing and other directions, can solve the problems of the accuracy of fuse life evaluation and other issues, and achieve the effect of mentioning accuracy

Active Publication Date: 2016-02-03
SUZHOU NUCLEAR POWER RES INST +1
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Problems solved by technology

[0004] The patent documents published by the applicant are "intelligent fuse life test system", "fuse life characteristic data test and evaluation system and its evaluation method", "man-machine interactive fuse life test and evaluation system" and "fuse In the "Automatic Temperature Measurement System for Devices", several problems such as the life test system, the life evaluation method with variable acceleration factors, the automatic analysis and identification of invalid life test data, and the automatic temperature measurement were solved, but the melt activation energy has been using empirical data. , has not been determined by the test method, which will affect the accuracy of the life evaluation of the fuse

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  • A method of detecting the life of a fuse by determining the activation energy of the melt
  • A method of detecting the life of a fuse by determining the activation energy of the melt
  • A method of detecting the life of a fuse by determining the activation energy of the melt

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Embodiment Construction

[0013] The present invention will be further described below.

[0014] The method of the invention is to determine the activation energy of the melt by means of experiments, and then determine the parameters of the metal electromigration life evaluation model of the fuse, thereby improving the accuracy of the life evaluation of the fuse.

[0015] In the specific implementation, firstly, different test currents are applied to the three groups of fuses to carry out accelerated aging tests with different accelerated stresses. The test currents of the three groups of fuses are all greater than the rated current and less than the minimum agreed fusing current; then each group of fuses is obtained At the same time, the average melt temperature and the average melt temperature of each group of fuses are different, as shown in the table below, and the average operating time and average operating time of each group of fuses are calculated by using the reliability prediction theory For ...

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Abstract

The invention discloses a method for assessing service lives of fuses by determining activation energy of melts. The method comprises the steps that accelerating aging test of different accelerated stresses is conducted on a plurality of sets of fuses, metal electromigration service lives of the melts under different temperatures are obtained according to a plurality of sets of test data, the activation energy of the melts is calculated in the curve fitting method, parameters of service life assessing models of the fuses are determined, and therefore the service lives of the melts under different conditions can be calculated, and the activation energy of the melts is determined in a test method to assess the service lives of the fuses. Compared with empirical data adoption in the prior art, the method can improve accuracy of assessment of the service lives of the fuses.

Description

technical field [0001] The invention relates to a method for evaluating the life of a fuse, in particular to a method for detecting the life of a fuse by determining the activation energy of a melt. Background technique [0002] During the use of the fuse, due to the current flowing through itself and the influence of the external environment, it will inevitably undergo aging and degradation, which will affect the service life. Studies have shown that as long as the operating environment can be guaranteed, the life of the fuse depends mainly on the state of the melt. [0003] The main aging mechanism of the fuse melt under energized conditions is metal electromigration, that is, ion migration in the metal. This migration will cause mass loss in a local area and voids, or mass accumulation and hillocks or solidification. The burrs cause metal defects, increase the resistance, cause local overheating, and the melt temperature rises. The high temperature will accelerate the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
Inventor 石颉姚建林施海宁
Owner SUZHOU NUCLEAR POWER RES INST
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