| 引用本文: | 张菲菲,李志刚,李玲玲,王婧.触点寿命试验中初始接触电阻与寿命的关系研究[J].电力系统保护与控制,2015,43(5):63-68.[点击复制] |
| ZHANG Feifei,LI Zhigang,LI Lingling,WANG Jing.Research on the relationship between initial contact resistance and lifetime in contact life tests[J].Power System Protection and Control,2015,43(5):63-68[点击复制] |
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| 摘要: |
| 若能发现继电器触点初始接触电阻与寿命的关系，就可以根据初始接触电阻值预测出单个产品的寿命，而不需要对试品进行完全寿命试验来获得试品的寿命，还可避免用批产品寿命代表样本个体寿命的缺点。所以，对寿命试验中的初始接触电阻与寿命的关系进行了研究。在按照寿命大小对继电器进行分类的基础上，比较分析了各类继电器的接触电阻的规律。分析结果表明：继电器的寿命与初始接触电阻值的大小有关。当初始接触电阻连续出现较大值时，即使在运行一段时间后，接触电阻回到正常值，继电器仍会发生早期失效，寿命较短；当继电器的接触电阻在运行初期正常 |
| 关键词: 接触电阻 寿命 电磁继电器 触点 失效 |
| DOI：10.7667/j.issn.1674-3415.2015.05.010 |
| 投稿时间：2014-05-23 |
| 基金项目:国家自然科学基金(51377044)；高等学校博士学科点专项科研基金(20121317110008)；河北省科技支撑计划资助项目(13214303D, 13214604D) |
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| Research on the relationship between initial contact resistance and lifetime in contact life tests |
| ZHANG Feifei,LI Zhigang,LI Lingling,WANG Jing |
| (School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China;Zhangjiakou Wind and
Solar Power Energy Demonstration Station Co., Ltd., State Grid Xinyuan Company, Zhangjiakou 075000, China) |
| Abstract: |
| If it could be found that the relationship between early contact resistance of relay and lifetime, the lifetime of a single product would be obtained by the prediction of early contact resistance, instead of using the complete life tests. Meanwhile, this method could avoid the disadvantage of using the life of a batch of products to represent the life of a sample. So, the relationship between contact resistance values and lifetime in life tests are studied. Based on relays’ classification by the size of lifetime, the varying characteristic of the early contact resistance are compared and analyzed among groups of relays. The analysis shows that the lifetime of relays is related to the values of initial contact resistance. The relay is prone to early failure, and has short lifetime, when there are several large values of contact resistance in the early period in operation of relay, even if the value of contact resistant go back to the normal range after operating for a while. When the values of contact resistance are normal in the beginning period, and have a trend of soaring increase in the middle and later period, the relay is about to fail. The remaining useful life at the maximum of contact resistance is related to the change of the contact resistance values. |
| Key words: contact resistance lifetime electromagnetic relay contact failure |
