Analysis and Comparison of Switching Losses and Temperature using Si and SiC devices applied in Two Stage AC-DC Converter for Battery Pack Testing System

배터리팩 시험기를 위한 2단 구성 AC-DC 컨버터의 Si와 SiC의 손실 및 온도 비교 분석

This paper analyzes switching losses, efficiency and temperature depending on Si and SiC devices applied in two stage AC-DC converter. To evaluate the charge and discharge performance and stability of the battery pack, there is a need for a battery pack testing system. To do battery charge and discharge experiment used in battery pack test, A topology, two stage AC-DC converter, has been built. SiC devices more decrease switching losses than that of Si. Also, cooling system was applied in Si and SiC devices. When using SiC devices, it can be confirmed that the size of heat sink is reduced for small loss.