电力-内燃双动力动车组车门速度异常故障分析与改进

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Analysis and Improvement of Door Speed Signal Abnormality Fault of Electro-diesel Multiple Unit

GUO Qi

（CRRC Qingdao Sifang Locomotive &Rolling Stock Co.，Ltd.，Qingdao 266111，China）

Abstract：During the routine dynamic commisioning test on an electro-diesel multiple unit composed of 4 cars exported to the South America，all the doorcontrollers of the door system reported the speed signal fault from the train to the train control system. According to the car fault judgment logic，when the zero-speed signal and the running signalof the train are valid simultaneously，the door controlers willreport the speed signal fault from the train. Through analysis and measurement on car，it was found that the fault had been caused by thecontact adhesion of the zero-speed relay of car in the power-loss moment，which made the zerospeed signal and the running signal of train received by the door controlers simultaneously validand the fault fed back to the train control system.Further verification of the capacity of the relay contact showed that the capacityof the contact was smaller，which caused overload and disconnection of the zero-speed relay in the power-loss moment，leading to the contact adhesion.After verifying the contact capacity of the al-lights-off relayin thelighting system，the two models of relays were exchanged，which both ensured the normal function of the lighting system and solved the speed signal abnormality fault，thereby ensuring the safe operation of the door system.

Keywords：electro-diesel multiple unit；door system；zero-speed relay；al-lights-off relay；contact adhesion

中国中车集团有限公司（以下简称“中国中车”）为开拓海外市场，开发了一种满足南美用户需求的以电力和内燃为动力源的双动力动车组。（剩余3624字）