Inverter-integrated electric compressor with inverter storage box arrangement

An inverter-integrated electric compressor for an air-conditioner apparatus of a vehicle, the inverter-integrated electric compressor comprising:

• an electric compressor;
• a housing accommodating the electric compressor;
• an inverter storage box provided on an outer circumference of the housing;
• and
• an inverter apparatus for converting direct-current power to three-phase alternating-current power and supplying power to an electric motor, the inverter apparatus being integrated with the inverter storage box,
• wherein the inverter apparatus comprises:
• (i) a metal plate secured in the inverter storage box;
• (ii) a plurality of power semiconductor switching elements mounted on the metal plate;
• (iii) a power substrate mounted on the metal plate, the power substrate having thereon a power-related control circuit for operating the power semiconductor switching elements;
• and
• (iv) a busbar assembly having a plurality of busbars functioning as wiring of the inverter apparatus, each busbar being integrated with an insulator, and
• wherein the metal plate includes a first end and a second end, the first end being spaced apart from the second end in a motor shaft direction of the electric motor,
• wherein the first end of the metal plate is bent to form a first protrusion which protrudes upwardly from the metal plate in a direction of thickness of the metal plate, the first protrusion extending in a width direction perpendicular to the motor shaft direction,
• wherein the second end of the metal plate is bent to form a second protrusion which protrudes upwardly from the metal plate in the direction of thickness of the metal plate, the second protrusion extending in the width direction perpendicular to the motor shaft direction,
• wherein bosses are provided at least three locations on the metal plate by bending upwardly part of the metal plate, and at least one of the bosses is bent in a direction parallel to the first protrusion and the second protrusion, and
• wherein the power substrate is secured to the bosses of the metal plate.