Drive apparatus
First Claim
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1. A drive apparatus comprising:
- a motor including a cylindrical motor case that forms an outer periphery, a stator that is disposed on a radially inner side of the motor case and has windings wound about the stator to form a plurality of phases, a rotor disposed on a radially inner side of the stator, and a shaft that rotates together with the rotor;
a heat sink extended in a same direction as a center line direction of the shaft from an end wall of the motor case; and
an electronic control unit that is disposed on a heat sink side in the center line direction of the motor case, and performs control of drive of the motor,wherein the electronic control unit includes;
semiconductor modules that include semiconductor chips for switching winding currents which flow through the windings of the plurality of phases, and that is placed longitudinally to be directly or indirectly in contact with a side wall surface of the heat sink so that a vertical line to each semiconductor chip surface is non-parallel to the center line of the shaft;
capacitors connected in parallel between a line from power supplying sides of the semiconductor modules to a power supply and a line from grounding sides of the semiconductor modules to a ground; and
a choke coil disposed in a power line from the power supply for the semiconductor modules and disposed on a radially inner side of a side wall of the heat sink, andwherein the semiconductor modules, the heat sink and the capacitors are arranged to overlap one another at least partly in the center line direction, and the semiconductor modules, the heat sink and the choke coil are arranged to overlap one another at least partly in the center line direction.
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Accused Products
Abstract
An electronic control unit (50, 70) including semiconductor modules (501 to 506) and capacitors (701 to 706) is disposed in the axial direction of a motor (30). The semiconductor modules (501 to 506) are placed longitudinally and brought into contact with a heat sink (601). The vertical line to each of surfaces of semiconductor chips included in the semiconductor modules (501 to 506) is perpendicular to the axial line of the motor (30). Accordingly, the capacitors (701 to 706) are disposed so that at least a part of the capacitors (701 to 706) overlap the semiconductor modules (501 to 506) and heat sink (601) in the axial direction of the motor (30).
35 Citations
20 Claims
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1. A drive apparatus comprising:
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a motor including a cylindrical motor case that forms an outer periphery, a stator that is disposed on a radially inner side of the motor case and has windings wound about the stator to form a plurality of phases, a rotor disposed on a radially inner side of the stator, and a shaft that rotates together with the rotor; a heat sink extended in a same direction as a center line direction of the shaft from an end wall of the motor case; and an electronic control unit that is disposed on a heat sink side in the center line direction of the motor case, and performs control of drive of the motor, wherein the electronic control unit includes; semiconductor modules that include semiconductor chips for switching winding currents which flow through the windings of the plurality of phases, and that is placed longitudinally to be directly or indirectly in contact with a side wall surface of the heat sink so that a vertical line to each semiconductor chip surface is non-parallel to the center line of the shaft; capacitors connected in parallel between a line from power supplying sides of the semiconductor modules to a power supply and a line from grounding sides of the semiconductor modules to a ground; and a choke coil disposed in a power line from the power supply for the semiconductor modules and disposed on a radially inner side of a side wall of the heat sink, and wherein the semiconductor modules, the heat sink and the capacitors are arranged to overlap one another at least partly in the center line direction, and the semiconductor modules, the heat sink and the choke coil are arranged to overlap one another at least partly in the center line direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification