Patent ID: 7352077

Claim:
A motor-driven supercharger comprising: a turbine shaft having a turbine impeller in one end; a compressor impeller coupled to the other end of the turbine shaft; a bearing housing rotatably supporting the turbine shaft; a turbine housing surrounding the turbine impeller and coupled to the bearing housing; a compressor housing surrounding the compressor impeller and coupled to the bearing housing; a motor rotor fixed to the turbine shaft and rotating together with the turbine shaft; a motor stator surrounding the motor rotor and fixed within the bearing housing; an inverter converting a dc power into an ac power so as to input to the motor stator; an inverter controller controlling a frequency and a voltage of the ac power by the inverter on the basis of an external command; a driver container accommodating the inverter and the inverter controller; and an insulating coupling member coupling the driver container to the compressor housing, wherein the driver container is formed in a donut shape or a U shape, and wherein the insulating coupling member has an air-cooled or water-cooled insulating layer insulating heat in such a manner as to prevent a high temperature of the air discharged from the compressor from being transferred to the driver container.