| Title |
Heat Distribution Analysis of a Resonant Power Converter Heat Sink System for an Air Conditioner Using ANSYS |
| Authors |
Keun-Woo Han ; Young-Gook Jung |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2017.31.6.070 |
| Keywords |
Heat Distribution Analysis ; ANSYS/Thermal Solution ; Finite Element Analysis(FEA) ; Resonant Power Converter ; Heat Sink System ; Air Conditioner |
| Abstract |
This study deals with the heat distribution analysis of the heat dissipation system of the resonant power converter for a non starting air conditioner compressor in commercial vehicles using ANSYS. The heat sink and the peripheral parts of the power converter were set as the thermal analysis model. The external temperature under natural convection condition was set at 25℃ and the heat flux value corresponding to the exothermic parts such as MOSFET was inputted. As a result of the ANSYS simulation with the above thermal analysis condition, the heat sink of the power converter showed a maximum heat distribution of 28.4℃, and the maximum temperature of the power converter including the heat sink was about 59.2℃. From this result, the size (L) 250mm in the horizontal direction of the heat sink selected at the beginning of the development was reduced to 210mm by the simulation result. Experiments were conducted under maximum load conditions (2.5kW) using a reduced 210mm heat sink and two original 250mm heat sinks. There was little temperature difference between the two cases except for the wire part. Looking at the heat distribution, the temperature is high in the busbar and switching device, and is measured at about 51℃ for MOSFET and 33℃ for heat sink. Without ANSYS simulation, it was possible to predict about 30℃ for the heat sink and about 55℃ for the MOSFET. Finally, the resonant current of the transformer with respect to the 2.5kW resistive load, the converter output voltage and the output current were obtained, and the output voltage of 250V could be stably maintained even at the battery voltage of 24V. |