Simple compact-type power module device

The utility model discloses a simple compact-type power module device, and the device comprises an IGBT composite structure, a supporting capacitor mechanism, a system control board, a driving board mechanism, and a support. The IGBT composite structure, the supporting capacitor mechanism and the system control board are sequentially arranged in the longitudinal direction in a layered manner, and are respectively in directly or indirectly fixed connection with the support. The driving board mechanism is disposed on a side surface of the support. The supporting capacitor mechanism is in directional butting joint with the IGBT composite structure. A capacitor composite busbar in the supporting capacitor mechanism is directly attached to an IGBT composite busbar in the IGBT composite structure. The device is low in cost, facilitates the placement of elements, and is high in integration level.