Patent ID: 7038422
Filing Date: 2006-05-02
Classification: B60H,H02K

Abstract:
1. An electrical actuator system comprising: an electrical motor; a movable member supported to be movable; a transmission mechanism which transmits a rotational force of the electrical motor to the movable member; a rotation member which rotates in accordance with rotation of the electrical motor; a pulse generator for generating first and second pulse signals in accordance with rotation of the rotation member, wherein the pulse generator generates the first and second pulse signals by a first pulse pattern in an operation region of the rotation member and by a second pulse pattern different from the first pulse pattern in an initialization region of the rotation member, and the initialization region is separate from the operation region; a moving position detector which detects a position of the movable member based on the first and second pulse signals generated from the pulse generator in the operation region; an initial position detector which detects a start point of the movable member based on the first and second pulse signals generated from the pulse generator in the initialization region; a controller which controls the electrical motor to displace the movable member to a target position, based on the position detected by the moving position detector with respect to the start point detected by the initial position detector, wherein: when the pulse generator generates the first and second pulse signals in the operation region, the transmission mechanism transmits the rotation force of the electrical motor to the movable member; and when the pulse generator generates the first and second pulse signals in the initialization region, the transmission mechanism stops the transmission of the rotation force of the electrical motor to the movable member.