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박성기(Sungkee Park),이진영(Jinyoung Lee),서형주(Hyungju Seo),김병우(Byungwoo Kim),김영길(Younggil Kim),모진서(Jinsur Mo) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
A Junction Box (electrical distribution box) is electrical equipment assembled by components such as bus bars, relays, and fuses to control the electric current flow in electrical devices. Joule heat is generated in the components because of electrical bulk resistance and electrical contact resistance. Several overheated parts can be damaged during a operation. This study presents a methodology for simulating the transient temperature distribution of buss bars, electrical relays and a junction box. The finite element formulation of a coupled electric-thermal problem, which includes the effect of Joule heating is reviewed for the simulation. A FEA (Finite Element Analysis) and experiments involving the bus bar, relay and junction box are conducted to investigate their effect on the temperature distribution. The temperature distributions of these obtained through the FEA are compared with those obtained via experiments to verify the accuracy of the FEA procedure.