Analysis And Simulation Of Electromagnetic Coupling In Transmission Of Bus Cable

Bus usually uses cable as transmission medium. The coupling phenomenon between cables is one of factors which threatens the normal operation of bus. This research has used antenna theory to analyze bus cable's radiation problem and has build cable model in Ansoft HFSS for the train's multibus cable's laying issue. This research also has done electromagnetic simulation and found out the main affect factors which affect the train's bus cable's radiation intensity problem by simulation and experiment. The objective of this research is to find out the relationship between the length of cable and the frequency of bus selected and the ability of radiation; finds out the frequency range to improve the train's bus transmission's safety and reliability.This research has build three dimensional physical model of bus cable in Ansoft HFSS and set the parameter like excitation; then generated the mesh which finite element method needed, and then set all parameter which simulation needed.Then the research has done the simulation for bus cable coupling issue without metal shield pipeline during the researching process. The result of simulation has demonstrated that the frequency of baseband signal which bus uses is one of important factors that effects the coupling between cables. Then the research has used antenna theory to find out how to select the frequency of baseband signal to reduce coupling between bus cables. And the research also has done experiment which aim at the result of simulation in the laboratory to verify the result of simulation.This research also has done the simulation for bus cable coupling issue with metal shield pipeline during the simulation process. The research has studied the distance between cables; the distance between cable and metal shield pipeline; the thickness of metal shield pipeline and the material of metal shield pipeline's effect to the coupling between cables and found out the optimization solution for each of them.