Patent ID: 7208897
Filing Date: 2007-04-24
Classification: E05F,E05Y,G05B

Abstract:
1. A barrier operator system comprising: a barrier drive; a motor connected to and operating the barrier drive; a power amplifier that drives the motor; a sensor that provides feedback in a form of position, direction or speed; a controller with memory that stores a predetermined non-linear motion profile for the barrier drive, and that receives the feedback from the sensor and dynamically adjusts a control signal provided to the power amplifier according to the predetermined non-linear motion profile, wherein said motor, power amplifier, sensor and controller implement a closed-loop motion control algorithm to control the barrier drive according to the stored non-linear motion profile; and an interface for user-initiated input, wherein the non-linear motion profile comprises an opening motion profile comprising: an initial over-voltage function to provide increased starting torque and quick acceleration of a barrier; a slew function to provide movement at a highest operating speed of the motion profile to open the barrier; and a concluding deceleration function to provide a soft stop of the barrier at the fully opened position.