| 摘要 |
<p>Disclosed is an electric power steering apparatus which includes: a steering shaft connected to a steering wheel of a vehicle; an electric motor for supplying auxiliary steering power; a direction sensor (610) including a light emitting unit (601) and a light receiving unit (602) which face each other; a rotary member (620) interposed between the light emitting unit and the light receiving unit, having at least one slot (611) and rotating as the steering shaft rotates; a motor position sensor (640) for detecting a rotation angle of a rotation shaft of the electric motor; and a control unit (123) receiving electric signals from the direction sensor and the motor position sensor to calculate a steering angle.
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