Electric compressor

An electric compressor comprising:

• a compressor housing having a central axis and including a circumferential wall around the central axis and side walls projected from the circumferential wall;
• a compression mechanism arranged in the compressor housing for compressing fluid;
• an electric motor operatively connected to the compression mechanism for driving the compression mechanism;
• an accommodating portion integrally formed on an outer surface of the compressor housing at least partially with the projected side walls, the accommodating portion defining an accommodating space, an inner surface of the accommodating space including a bottom surface and a side surface, the bottom surface being defined as a radially inward surface of the inner surface proximal to the central axis, the side surface surrounding a periphery of the bottom surface, and
• a motor drive circuit arranged in the accommodating space for driving the electric motor,
• wherein the motor drive circuit includes:
• a substrate arranged on the circumferential wall;
• a plurality of electrical components mounted on the substrate on the side proximal to the central axis, the electrical components including short electrical components having relatively short height from the substrate and tall electrical components having relatively tall height from the substrate, wherein the electrical components line the bottom surface of the accommodating space in such a manner that the short and tall electrical components are respectively arranged on the substrate on the proximal and peripheral portions relative to the central axis.