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Control apparatus-integrated dynamoelectric machine

  • US 8,299,666 B2
  • Filed: 06/21/2010
  • Issued: 10/30/2012
  • Est. Priority Date: 01/18/2010
  • Status: Active Grant
First Claim
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1. A control apparatus-integrated dynamoelectric machine comprising:

  • a dynamoelectric machine main body comprising;

    a stator that has an armature winding;

    a rotor that has a field winding; and

    a housing that supports said stator and said rotor; and

    a control apparatus that is mounted integrally onto said dynamoelectric machine main body, said control apparatus comprising;

    a power circuit module and a field circuit module that respectively supply electric power to said armature winding and said field winding, said power circuit module and said field circuit module each comprising;

    a flat element heat radiating portion that is made of a metal; and

    a switching element that is mounted to a front surface of said element heat radiating portion;

    a heatsink that is prepared by die casting, said power circuit module and said field circuit module are mounted on said heatsink; and

    a switching element controlling means that controls said switching elements, wherein;

    said heatsink comprises a base plate; and

    a plurality of convex heat receiving portions that are each disposed so as to project from a front surface of said base plate, projecting end surfaces that constitute heat receiving surfaces, and said power circuit module and said field circuit module are respectively mounted to each of said heat receiving surfaces;

    said power circuit module and said field circuit module each comprise a seal main body portion that is made of an electrically insulating resin that seals said switching element so as to expose a bottom surface of said element heat radiating portion at a reference surface that has a surface shape that corresponds to a shape of said heat receiving surface, said power circuit module and said field circuit module each being disposed such that said bottom surface of said element heat radiating portion is oriented toward said heat receiving surface;

    an electrical insulation supporting layer is interposed between said heat receiving surface and said bottom surface of said element heat radiating portion; and

    an electrically insulating lug that is made of an electrically insulating material is configured integrally into said seal main body portion and projects toward said heat receiving surface from said reference surface, and a projecting length of said electrically insulating lug from said reference surface is set such that said electrical insulation supporting layer ensures electrical insulation between said heat receiving surface and said bottom surface of said element heat radiating portion, and has a heat radiating performance such that heat from said switching elements is radiated to said convex heat receiving portions such that the temperature of said switching elements does not exceed a predefined permissible upper limit temperature, when said power circuit module and said field circuit module are disposed so as to place said electrically insulating lug in contact with said heat receiving surface.

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