Patent ID: 9416579
Filing Date: 2016-08-16
CPC Classification: E05F,E05Y,E06B,H02P

Claim Text:
1. A drive and control system for a lifting gate with a vertically moveable gate leaf, comprising: a drive motor coupled directly to said gate leaf and adapted to vertically move said gate leaf, a control unit for actuating said drive motor, a power regulating unit for regulating said drive motor, and an accumulator unit, and wherein said drive motor is a synchronous motor capable of being down-regulated to zero rotational speed and configured to provide sufficient torque directly to said gate leaf at zero rotational speed to hold said gate leaf at a current position, wherein said control unit actuates said drive motor upon the occurrence of a stop condition such that its rotational speed is reduced in a controlled manner and said gate leaf is thereby braked in a motor-driven manner, and to activate a holding brake after the drive motor has reached zero rotational speed, and wherein said accumulator unit provides said drive motor, said control unit and said power regulating unit with electrical energy during a power failure to ensure the operation of reducing the drive motor's rotational speed in the controlled manner and the holding of the gate leaf at the current position.