CRH380CL型动车组速度传感器故障诊断  

Fault Diagnosis of Speed Sensor of CRH380CL Electric Multiple Unit

作　　者：刘光辉[1] 朱峰[2] 邱日强 苟江川 杨晓丽 

机构地区：[1]郑州铁路职业技术学院电气工程系 [2]西南交通大学电气工程学院 [3]郑州心忠圆科技有限公司

出　　处：《电气化铁道》2016年第6期49-52,共4页Electric Railway

摘　　要：根据速度传感器受干扰现场实测数据以及出现的干扰状况,结合该型传感器的工作原理及实验室实验给出了相应的故障排查思路,分析干扰性质以及耦合路径。研究发现,9车、10车之间风挡处有绝缘节且其阻值远远大于车体阻值,导致牵引电流通过两车之间的钩缓回流到牵引变电站。牵引电流上车后,10车车体电位为3.2 V,干扰速度传感器正常工作。在10车加保护接地后,10车车体电位为0.29 V,干扰消除,从而验证了故障诊断的有效性。According to the actual data of tested speed sensor at site with interference and interference conditions, with combination of working principles of this type of sensor and related way of thinking for fault trouble-shooting obtained from laboratory experiment, the nature of interference and coupling route are analyzed. Researches show that there is an insulated joint at the windshield between car 9 and 10, with its resistance value greater than that of the car body, which will lead to the traction current flowing back to the traction substation via the car coupler and buffer between the two cars. The car 10 body potential will be 3.2 V after traction current has been flowed into the car, and the normal operation of speed sensor is affected. After earthing protection has been made for the car 10, its car body potential is 0.29 V with the interference eliminated; therefore, the effectiveness of fault diagnosis is verified.

关 键 词：高速动车组 速度传感器 牵引回流 电磁干扰 车体电位 

分 类 号：U284.48[交通运输工程—交通信息工程及控制]