公开(公告)号：EP0237152A1

公开(公告)日：1987-09-16

申请号：EP87300546.6

申请日：1987-01-22

Applicant: GENERAL MOTORS CORPORATION

Inventor： Thornton, Dennis P. ,  Foust, Jeff A. ,  Maceross, John S. ,  Cook, Keith R.

IPC: H02P7/00

CPC classification number: E05F15/695 ,  E05Y2201/604 ,  E05Y2201/652 ,  E05Y2400/32 ,  E05Y2400/336 ,  E05Y2400/358 ,  E05Y2800/407 ,  E05Y2800/73 ,  E05Y2900/55

Abstract: Motor control apparatus is disclosed for a motor-driven vehicle power window mechanism (l0) including a flexible drive element, such as a drive tape, adapted to drive the window in a predetermined direction by being placed in tension by a motor (ll) of the mechanism (l0). The tension of the flexible drive element is relieved by automatically reversing the direction of rotation of the motor (ll) for a short time when the window reaches the desired position. The reverse motor rotation is accurately controlled to an amount sufficient to relieve drive tension, but insufficient to produce unwanted reverse movement of the window, by detecting the pulses of the armature ripple current as successive commutator bars of an armature of the motor (ll) pass the brushes (l2) during reverse motor rotation, integrating these pulses and stopping the reverse motor operation when the integrated value reaches a predetermined reference.

公开(公告)号：EP0237152B1

公开(公告)日：1991-01-02

申请号：EP87300546.6

申请日：1987-01-22

Applicant: GENERAL MOTORS CORPORATION

Inventor： Thornton, Dennis P. ,  Foust, Jeff A. ,  Maceross, John S. ,  Cook, Keith R.

IPC: H02P7/00

CPC classification number: E05F15/695 ,  E05Y2201/604 ,  E05Y2201/652 ,  E05Y2400/32 ,  E05Y2400/336 ,  E05Y2400/358 ,  E05Y2800/407 ,  E05Y2800/73 ,  E05Y2900/55

Abstract: Motor control apparatus is disclosed for a motor driven vehicle power window mechanism including a flexible drive element, such as a drive tape, adapted to drive the window in a predetermined direction by being placed in tension by the motor. The tension of the flexible drive element is relieved by automatically reversing motor direction for a short time when the window reaches the desired position. The reverse motor rotation is accurately controlled to an amount sufficient to relieve drive tension but insufficient to produce unwanted reverse movement of the window by detecting the pulses of the armature ripple current as the successive commutator bars pass the brushes during reverse motor rotation, integrating these pulses and stopping the reverse motor operation when the integrated value reaches a predetermined reference.