PURPOSE: An inverter stack is provided to prevent a switching loss by directly installing a direct current capacitor and an IGBT(Insulated Gate Bipolar Transistor) in a busbar laminated by a thin copper plate and a thin insulating plate. CONSTITUTION: Busbars(140,150) comprises an insulating plate inserted between a plurality of copper plates and a plurality of output terminals formed in one end. A plurality of IGBTs(130) are installed in the other side of the busbar. A cooling plate(120) with inner side flow path is installed in the IGBT. A direct current capacitor(110) is connected to the busbar. The IGBT is installed in the busbar with a constant interval. The cooling plate has a penetration hole formed between the IGBT. The direct current capacitor is installed through the penetration hole of the cooling plate in the busbar.
