Patent ID: 8461733

Claim:
A power supply unit-integrated dynamoelectric machine comprising: a dynamoelectric machine main body that comprises: a housing that comprises a rear bracket and a front bracket that are each formed so as to have a bottom portion and a tubular portion, and that are coupled such that opening portions face each other; a rotor that is fixed coaxially to a rotating shaft that has a first end region and a second end region that are rotatably supported by said rear bracket and said front bracket; a stator that is disposed so as to surround said rotor, and that is held between open end portions of said rear bracket and said front bracket; and a fan that is mounted to a first end portion of said rotor; and a power supply unit comprising: a power circuit module and a field circuit module that supply electric power to said stator and said rotor; a base plate; and a heatsink to which said power circuit module and said field circuit module are mounted, said power supply unit being mounted integrally onto said dynamoelectric machine main body, wherein: said power supply unit is disposed between a radially inner side of said fan and a bottom portion of said rear bracket; said rear bracket comprises: an air discharge port that is formed on a portion that is positioned radially outside said fan; and an air suction port that has an opening nearer to said bottom portion than said power supply unit; said power supply unit-integrated dynamoelectric machine further comprises a partitioning member disposed between said power supply unit and said fan so as to allow communication of said power supply unit and the radially inner side of said fan, and that configures a ventilation channel in which air is sucked in through said air suction port by suction pressure that is generated on a radially inner side of said fan, and when said fan rotates the air is directed to a suction pressure portion of said fan so that it is passed through the radially inner side of the fan and subsequently is sent to said air discharge ports; said base plate has: a flat module mount portion to a front surface of which said power circuit module and said field circuit module are mounted; and first guide portions are disposed so as to protrude from edge portions radially outside portions, said heatsink includes a first radiating fin that is disposed so as to protrude from a rear surface of said flat module mount portion, said heatsink being disposed such that said first radiating fin extends inside said ventilation channel; and said first guide portions guide the air that has been sucked in through said air suction port between the rear surface of said flat module mount portion and the partitioning member, thereby the air that has been sucked in passes through an outer circumferential portion of said flat module mount portion, flows radially inward between the rear surface of said flat module mount portion and the partitioning member, and is led to the suction pressure portion of said fan.