Fault Analysis and Rectification of Traction Removal for CRH5 EMU

Abstract

As an important component of traction system, TCU (Traction Control Unit) is one of the most important factors of driving safety. Recently, TCU of CRH5 EMU(Electric Multiple Units) frequently reports fault information such as CAN communication interference and ALCA board failure. In order to solve this problem, this paper analyzes the principle of traction system and TCU internal board circuit, and carries out the location test of interference source and interference path, theoretical analysis and simulation verification of interference mechanism, to find out the cause of electromagnetic interference in TCU system. Based on the circuit structure of traction converter, a rectification scheme for traction removal fault is proposed, which lays a technical foundation for solving the problem of electromagnetic interference in TCU system.