基于触头电弧侵蚀的交流接触器电寿命分布特征研究

发布时间：2018-03-11 12:39

本文选题：交流接触器　切入点：电寿命　出处：《中国电机工程学报》2017年22期 　论文类型：期刊论文

【摘要】：电寿命是交流接触器的重要性能指标之一,受各种因素的影响,其中电弧电流对触头的侵蚀是最主要因素。该文首先提出将电弧电流作为交流接触器触头系统侵蚀的参量,建立了基于起弧相角的触头磨损数学模型;然后基于损伤累积效应建立了交流接触器电寿命分布特征的数学模型,分析了负荷连接方式对其电寿命分布的影响;最后基于Monte Carlo方法建立了交流接触器电寿命模拟试验模型,并对交流接触器在不同工作状态下的电寿命进行了仿真,得到电寿命分布特征,并与可靠性研究领域公认的耗损型产品的寿命服从威布尔分布结论一致。仿真结果表明,文中提出的交流接触器电寿命分布特征的数学模型可以很好地解释实际使用中电寿命呈现出的分散性,对其可靠性的提高具有重要意义。
[Abstract]:Electric lifetime is one of the important performance indexes of AC contactor, and it is affected by various factors, among which the erosion of contact by arc current is the most important factor. In this paper, the arc current is first put forward as the parameter of AC contactor contact system erosion. The mathematical model of contact wear based on the starting phase angle is established, and the mathematical model of electrical life distribution of AC contactor based on damage accumulation effect is established, and the influence of load connection mode on electrical life distribution is analyzed. Finally, based on the Monte Carlo method, the electrical life simulation test model of AC contactor is established, and the electrical life of AC contactor under different working conditions is simulated, and the characteristics of electrical life distribution are obtained. The results of simulation show that the service life of wearable products in the field of reliability research is consistent with that of Weibull distribution. The mathematical model of the electrical life distribution characteristics of AC contactors presented in this paper can explain the dispersion of electric life in practical use and is of great significance for improving the reliability of AC contactors.
【作者单位】：电磁场与电器可靠性省部共建重点实验室(河北工业大学);
【基金】：国家自然科学基金项目(51377043) 国家重点基础研究发展计划项目(973项目)(2015CB251002) 河北省自然科学基金(E2015202109) 河北省高等学校创新团队领军人才培育计划(LJRC003)~~
【分类号】：TM572.2

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