Patent ID: 7530199

Claim:
A method to control a power slide device comprising a motor, a wire drum for moving a slide door slidably mounted on a vehicle body in a door-opening direction or in a door-closing direction when rotated, a clutch mechanism disposed between the motor and the wire drum, a drum speed sensor for detecting a rotational speed of the wire drum, and a motor speed sensor for detecting a rotational speed of the motor, said method comprising the steps of: accelerating the motor initially for a predetermined reference speed; during the initial acceleration period, judging that the slide door is in a state of abnormal acceleration when a rotational speed of the wire drum measured by the drum speed sensor is of and above a given value and a difference between a rotational speed of the wire drum and a rotational speed of the motor measured by the motor speed sensor is of and above a given value, and reducing a rotational speed of the motor temporarily; and after that, accelerating the motor again for the reference speed.