Patent ID: 6729433
Filing Date: 2004-05-04
Classification: B62D

Abstract:
An electrically-powered steering device comprising:a motor working to produce torque for assisting in turning a steering wheel; a torque transmission mechanism working to transmit the torque outputted by said motor to a steering shaft connecting with the steering wheel; a torque detector working to measure torque acting on the steering shaft; and a controller working to control an output of said motor as a function of the torque measured by said torque detector, wherein said motor, said torque transmission mechanism, said torque detector, and said controller are arranged integrally as a unit, wherein said controller includes a motor driver working to control an exciting current supplied to said motor and a control substrate to which terminals of the motor driver are connected electrically, the control substrate being installed so that the steering shaft passes through a portion of the control substrate, and wherein power terminals of said motor, terminals of said torque detector, and terminals of said motor driver extend in an axial direction of the steering shaft and connect electrically to the control substrate from the same side.