The Finite Element Modeling And Optimizing Of Electric Connector In Power Equipment Cabinet

Now, the cabinet has become an indispensable part in the computer industry, the communications industry and Internet industry. Cabinets are supplied by power equipment cabinet. Whether the electronic equipments in the cabinct can operate securely, reliably, stably depend on whether the power equipment cabinet can provide accurate, stable current. So the research for the current transfer part of the power equipment cabinet which is called copper bar is particularly important. When the power equipment cabinet is working, there will be a large current flowing through the copper bar of the power equipment cabinet. It will definitely brings a great increase in temperature. When the copper bar’s temperature exceeds a certain limit, the contact surface of the copper bar will become soften or melt even boiling. This may results in contact interface melting and metals transfer from one to another. It will also accelerate the oxidation of metal surface and will cause the phase changes, so that the mechanical strength will decrease which can affect the performance of the electric products. In case of an overload or short circuit fault, it may damage electrical appliances, even cause a serious accident. Therefore we need to get a temperature distribution of the copper bar which to analyze the temperature conditions of the copper bar.Based on the thermal analysis of copper bar, we use ANSYS finite element software to simulation a working copper bars in order to get the temperature distribution. We established in three models of the simulation experiments. They are the model of the contact part in copper bar, the model of the entire copper bar and the model of creep. Then we analyze the temperature distribution of the copper bar and the preload of the bolts and obtain simulation results.Finally, we propose two optimization schemes of the copper bar. One is to optimize the structure of the copper bar, the other is the optimization by a forced convection way. Based on the simulation results, both of the optimization has a certain effect in reduce the temperature of a working copper bar.