NOVELTY - The inverter (100) has a power module provided with a power semiconductor device i.e. insulated gate bipolar transistor (IGBT). A cooling module is coupled to the power module, and allows flow of a coolant through the power module. A capacitor module (70) is mounted at the cooling module through a mounting unit (90) to absorb ripple current of the power module. The power module, the cooling module and the capacitor module are pre-coupled to form a module component (10) that is mounted in a frame (20).    USE - Inverter for use in a vehicle e.g. hybrid vehicle, fuel cell vehicle or electric vehicle, to convert high direct current (DC) voltage generated at a battery into three-phase alternating current (AC) voltage for controlling a high speed electric motor. Can also be used for a motor vehicle e.g. passenger vehicle such as sports utility vehicle (SUV) and bus, and commercial vehicle such as lorry, a watercraft e.g. boat and ship, an aircraft, a plug-in hybrid electric vehicle and a hydrogen-powered vehicle.    ADVANTAGE - The power module, the cooling module and the capacitor module are pre-coupled to form the module component that is mounted in the frame, so that structural rigidity of the inverter is enhanced, and the need for forming assembling holes at the frame for electrically connecting the power module with the capacitor module can be avoided, thus avoiding the need for utilizing a cover for closing the assembling holes, and enhancing assembling structures of the power module and the capacitor module, and hence reducing a risk of leakage, and enhancing efficiency and quality of assembling of the inverter. The inverter can be formed with less number of components, thus reducing manufacturing cost and weight of the inverter, and simplifying assembly process of the inverter.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of an inverter for a vehicle.    Module component (10)    Frame (20)    Capacitor module (70)    Mounting unit (90)    Inverter (100)