DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE INCLUDING THE DRIVE DEVICE

摘要

A drive device that includes a rotating electric machine having a stator with a winding wound on the stator, a rotor rotatably disposed relative to the stator, and a shaft rotating together with the rotor. The drive device also includes a frame member fixed on the rotating electric machine. The drive device further includes a circuit board fixed on the frame member, with a first surface of the circuit board on a frame member side serving as a heat generation element mount surface. The drive device also has a drive element located on the first surface of the circuit board in a heat dissipatable manner, and serving as a component of an inverter that switches on and off to supply an electric current to the winding.

主权项

1. A drive device comprising:
a rotating electric machine having a stator with a winding wound on the stator, a rotor rotatably disposed relative to the stator, and a shaft rotating together with the rotor; a frame member fixed on the rotating electric machine; a circuit board fixed on the frame member, a first surface of the circuit board on a frame member side serving as a heat generation element mount surface; a drive element disposed on the first surface of the circuit board in a heat dissipatable manner and serving as a component of an inverter that switches on and off to supply an electric current to the winding; and a controller component including at least one of a calculation circuit performing a calculation process, a pre-driver outputting a drive signal to the drive element, a regulator adjusting a voltage of a power source and outputting the adjusted voltage, a signal processor processing an input signal, and a rotational angle sensor detecting a rotation angle of the rotor, the controller component being mounted on a same circuit board as the drive element.