银氧化镉触点切换容性负载的试验研究  

Experimental Investigation of Electrical Performance of AgCdO Contact Material under Switching Capacitive Load Conditions

作　　者：刘凯政 张旭 满思达 张文聪 任万滨[1] LIU Kai-zheng;ZHANG Xu;MAN Si-da;ZHANG Wen-cong;REN Wan-bin(School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China;State Grid Materials Co., Ltd., Beijing 100120, China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001 [2]国网物资有限公司,北京100120

出　　处：《电工材料》2018年第3期3-7,13,共6页Electrical Engineering Materials

基　　金：国家自然科学基金(51377029;51777039);哈尔滨市应用技术研究与开发项目(2017RALXJ003)

摘　　要：采用开发的触点材料电性能试验系统,提取了银氧化镉触点切换容性负载过程的典型电压、电流波形,比较分析了寿命试验过程中燃弧时间、触点压力和接触电阻的变化特征,进而观察分析了材料表面的微观烧蚀状态以及可能的熔焊物理机制。In this paper, the typical voltage and current waveforms of AgCdO contact material under switching capacitive load were recorded by the test rig of electrical performance simulation.And then characteristics of arcing time, contact force and contact resistance during electrical endurance test were analyzed. Furthermore, the eroded contact surface morphology was observed by SEM. Finally, the possible physical mechanism of dynamic welding was proposed.

关 键 词：银氧化镉 容性负载 浪涌电流 电性能 失效机理 

分 类 号：TM503.5[电气工程—电器]