Patent ID: 6388412
Filing Date: 2002-05-14
Classification: E06B

Abstract:
A control system for controlling the operation of a door operator unit to move a door between open and closed positions, said operator unit including a reversible electric drive motor, a drive unit interconnecting said motor with a door, and an electrically operated brake unit operably connected to said drive motor and said drive unit for braking rotation of an output shaft of said drive unit, said control system comprising:a programmable microcontroller operable to provide door open, door close and door stop output control signals; a motor power supply control circuit for operating said drive motor in reverse directions of rotation; a motor drive circuit including motor relay actuator means, said motor drive circuit being adapted to receive control signals from said microcontroller to effect operation of said drive motor through said motor power supply control circuit to provide for one of opening and closing said door; and a brake control circuit operably connected to said microcontroller and operable to effect releasing said brake unit and provide a repeated pulse signal to said brake unit for progressively braking rotation of said output shaft.