船电技术2026，Vol.46Issue(5)：35-40,6.
动车组大功率触点元件电寿命试验方法研究
Research on Electrical Life Test Methods of High-Power Contact Elements in EMUs
摘要
Abstract
As a core control component in the EMU traction system,the electrical life of high-power DC contactors directly affects the operational reliability of the traction system.This study designed a dedicated test system and proposed a comprehensive test method that combines rated working condition life test and ultimate breaking capacity exploration aiming at the electrical life evaluation requirements of this type of contact element.By constructing a high-power electrical circuit and a high-precision measurement system,precise control of the contactor breaking process and acquisition of key parameters are realized.The rated breaking test was terminated at 300 operations due to the occurrence of open flames,revealing a potential failure mode beyond conventional electrical parameter monitoring.The step-breaking current test determined that the contactor's ultimate breaking capacity is 2900 A,with a safety margin of 16%.The established test method effectively identify the potential reliability risks of contactors,providing an important support for product improvement and reliability evaluation.关键词
动车组/触点元件/电寿命/试验平台/实验方法Key words
EMU/Contact Elements/Electrical Life/Test Platform/Test Methods分类
交通工程引用本文复制引用
金雪丰,徐小明,唐昊,杜康..动车组大功率触点元件电寿命试验方法研究[J].船电技术,2026,46(5):35-40,6.基金项目
牵引系统关键部件在线状态监测及寿命评估技术研究(2023YJ181) （2023YJ181）
