Cooling apparatus for electric motor control unit
AssigneeAisin Aw Co., Ltd.
InventorsKiyotaka Koga, Masayuki Takenaka
Life of this patent
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Abstract
A cooling apparatus for an electric motor control unit includes a heat sink that contacts power modules of the unit, a concave portion continuously formed in the heat sink and a wall member mounted on an opening face side of the concave portion so as to be fixed to the sink together define a coolant passage in the heat sink. In the heat sink, a projection projects from a mounting surface with respect to the wall member, and is fitted into a hole of the wall member and fixed to the heat sink by press-fitting. Thus, fluid leakage from cavities in a thin wall portion at a bottom of a bolt, such as in the case of conventional bolting, is prevented.
Claims20
A cooling apparatus for an electric motor control unit, comprising:
- a heat sink contacting a module of an electric motor control unit;
- a concave portion continuously formed in the heat sink;
- and
- a wall member mounted on an opening face side of the concave portion so as to be fixed to the heat sink, the concave portion and the wall member together defining a coolant passage in the heat sink, wherein
- the heat sink includes a plurality of projections projecting from a mounting surface with respect to the wall member;
- the wall member includes a plurality of holes, a hole fitted onto each projection;
- and
- the wall member fixed to the heat sink by press-fitting the projection of the heat sink.
Dependencies are inferred from the claim text.