Patent ID: 7207187
Filing Date: 2007-04-24
Classification: F01C,F04B,F04C,F25B,H02K

Abstract:
1. An inverter-integrated motor-driven compressor for an automotive vehicle, comprising: a compressor section constituting part of a refrigerating cycle apparatus; a motor section integrally connected to said compressor section for driving said compressor section; a housing for accommodating said compressor section and said motor section; and an inverter circuit section including a predetermined number of power switching elements for converting direct-current power into three-phase alternating-current power and supplying the converted alternating-current power to said motor section, wherein said motor section is cooled by a low-pressure coolant gas, said power switching elements are constituted by discrete transistors corresponding to each of phases, each discrete transistor having a side surface from which electrode terminals of the discrete transitor protrude and a flat bottom surface directly placed on an outer surface of a wall of said housing at a portion surrounding said motor section, the wall of the housing has both a mounting base portion having a flat mounting base surface and a stepped flat portion protruded along a radial direction of the motor section so as to be raised from the flat mounting base surface toward an outer side of the motor section, the flat bottom surfaces of the discrete transistors being fixedly placed on the flat mounting base surface of the mounting base portion, each of groups of discrete transistors have mutually different phases and are disposed in a line along an axial direction of the motor section, two discrete transistors corresponding to each of the phases are disposed adjacent to each other along a circumferential direction of the motor section through a wiring region in which the electrode terminals of one discrete transistor face the electrode terminals of the other discrete transistor, and the wiring region is placed on the stepped flat portion of the wall of the housing.