Patent ID: 8022585
Filing Date: 2011-09-20
Classification: H02K

Abstract:
1. An in-vehicle AC generator comprising: a stator fixed to a bracket; a stator winding provided on the stator; a rotor shaft pivotably supported by the bracket; a rotor that is fixed on the rotor shaft and disposed in a space situated more proximal from the rotor shaft than the stator; a magnetic-field winding provided on the rotor; a slip ring that is fixed on the rotor shaft and electrically connected with the magnetic-field winding; a brush that makes contact with the slip ring and supplies a magnetic-field current to the magnetic-field winding; a regulator having a circuit unit provided with a circuit for adjusting the value of a voltage generated across the stator winding and a heat sink that is adhered to a surface of the circuit unit and radiates heat generated in the circuit unit; and a regulator assembly having a brush holding unit that slidably holds the brush, a regulator holding unit that holds the regulator, and a connecter holding unit that holds a connecter for connecting the regulator with an external terminal, wherein the regulator holding unit is provided with a containing portion in which at least the whole periphery of an opening is surrounded by a wall member; the circuit unit is inserted into the containing portion through the opening; the heat sink is held by the containing portion in such a way that the peripheral portion thereof is adhered to the wall member that surrounds the whole periphery of the opening, and closes the opening; and the containing portion is provided with a resin filled in the vicinity of the contained circuit unit, and wherein the opening of the containing portion is formed in a rectangular shape, and four sides of the rectangle of the opening are surrounded by the wall member; and the heat sink is formed in a rectangular shape, and four peripheral sides of the rectangle thereof are adhered to the wall member with an adhesive.