DRIVE UNIT AND ELECTRIC POWER STEERING DEVICE INCLUDING THE DRIVE UNIT

摘要

A drive unit that includes a rotating electric machine having a stator with winding wound on the stator and with a shaft rotating within the stator, and a rotor rotatable relative to the stator. The drive unit also includes a controller holding member disposed on one end of the rotating electric machine, and a controller having a substrate fixed to the controller holding member, a heat generation element mounted on a heat generation element mounting surface. The drive unit further includes a power supply connector connecting the substrate and a power supply, and a ground line coupled to a ground terminal of the power supply providing a conductive connection to the controller holding member via the substrate and the power supply connector. With this structure, the drive unit's common mode noise may be reduced.

主权项

1. A drive unit comprising:
a rotating electric machine having a stator with winding wound on the stator and with a shaft rotating within the stator, and a rotor rotatable relative to the stator; a controller holding member disposed on one end of the rotating electric machine; a controller having
a substrate fixed to the controller holding member,a heat generation element mounted on a heat generation element mounting surface which is a controller holding member side surface of the substrate that enables heat dissipation from the heat generation element to the controller holding member, andelectronic components mounted on an electronic component mounting surface of the substrate, opposite to the heat generation element mounting surface; a power supply connector connecting the substrate and a power supply; and a ground line coupled to a ground terminal of the power supply providing a conductive connection to the controller holding member via the substrate and the power supply connector.