Prediction and analysis of crosstalk in high speed EMUs

摘要

Due to intensive cable arrangements in high speed emus and its vehicle equipment internal, measurement of crosstalk in the victim cable is not easy in wiring dense area. Consequently, a simple method, used to predict and analyze the crosstalk in wiring dense area is needful, to optimize cable arrangements for reducing conducted electromagnetic interference in the engineering operation. In this paper, firstly disturbance source in the culprit cable is transformed into disturbance source in the victim cable for building up voltage relationship between culprit cable and victim cable by using position function. Then crosstalk estimation formula with transmission line voltage reflection coefficient is derived in the high frequency. Thereby crosstalk voltage in victim cable is given when the disturbance source in different position of the culprit cable. After that modeling and analysis for couple of cable in high speed emus electric cabinet by electromagnetic simulation software are carried out, in order to prove the theoretical calculation results. Finally, analysis of calculation error between formula and simulation indicate that it is less than 2dB when cable terminal matched.