Drive unit
AssigneesHonda Motor Co., Ltd., Mitsubishi Electric Corporation
InventorsRyoji Tomokage, Masahiro Shimada, Seiichi Goto, Naoki Honishi, Takashi Omura
Life of this patent
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Abstract
A circuit unit of a drive unit includes a plate-shaped heat sink that extends in a direction perpendicular to an axis of rotation of a motor, and a lower case arranged on a lower side of the heat sink. In the drive unit, a fastening member, which is formed on the lower case, is fastened to a housing, and a height of a fastening surface, which is located on an upper end of the fastening member, is positioned within a height range that spans from a lower surface to an upper surface of the heat sink.
Claims6
A drive unit having a motor, and a circuit unit accommodating a drive circuit configured to supply to the motor electrical power input from a power source, the circuit unit being fixed to an upper side of a housing of the motor;
- the circuit unit comprising:
- a plate-shaped heat sink that extends in a direction perpendicular to an axis of rotation of the motor;
- and
- a lower case arranged on a lower side of the heat sink;
- wherein a fastening member, which is formed on the lower case, is fastened to the housing;
- a height of a fastening surface, which is located on an upper end of the fastening member, is positioned within a height range that spans from a lower surface to an upper surface of the heat sink;
- and
- the heat sink comprises a coolant flow path formed between an upper surface of the heat sink and a lower surface of the heat sink.
A drive unit having a motor, and a circuit unit accommodating a drive circuit configured to supply to the motor electrical power input from a power source, the circuit unit being fixed to an upper side of a housing of the motor;
- the circuit unit comprising:
- a plate-shaped heat sink on which components of the drive circuit are fixed on an upper surface and a lower surface thereof;
- and
- a lower case arranged on a lower side of the heat sink;
- wherein a fastening member, which is formed on the lower case, is fastened to the housing;
- a height of a fastening surface, which is located on an upper end of the fastening member, is positioned within a height range that spans from the lower surface to the upper surface of the heat sink;
- and
- the heat sink comprises a coolant flow path formed between an upper surface of the heat sink and a lower surface of the heat sink.
Dependencies are inferred from the claim text.