In-vehicle motor-driven compressor

An in-vehicle motor-driven compressor comprising:

• a housing, into which a fluid is drawn;
• a compression portion, which is accommodated in the housing and compresses the fluid;
• an electric motor, which drives the compression portion;
• and
• an inverter device, which drives the electric motor and converts DC power into AC power, wherein
• the inverter device includes
• a low-pass filter circuit, which is configured to reduce normal-mode noise included in the DC power, and
• an inverter circuit, which converts the DC power, of which the normal-mode noise has been reduced by the low-pass filter circuit, into the AC power,
• the low-pass filter circuit includes a normal-mode coil, which includes a pillar-shaped core extending in one direction and a winding wound around the core and forms an open magnetic circuit,
• the core has two end faces in an extension direction of the core,
• the inverter device includes a damping portion, and
• the damping portion is arranged at a position where the damping portion is opposed to at least one of the two end faces of the core and an eddy current is generated by magnetic force lines produced in the normal-mode coil.