| 摘要 |
Disclosed is a device for preventing excessive speed of a door leaf (4) caused by a power accumulator (6), the device comprising: a door leaf (4), which can be displaced between an open position and closed position, a power accumulator (6), which is coupled to the door leaf (4) and which provides the energy for the closing movement (SB) of the door leaf (4) in the event of failure of the electric energy supply, a door drive (12), which is coupled to the door leaf (4), wherein electric energy can be induced in the door drive (12) during a closing movement in the door leaf (4), a door control unit (16), which actuates the door drive (12) and which is suitable for regulating the movement velocity (V) of the door leaf (4), wherein the door control unit (16) can be operated by the induced electric energy in the event of failure of the electric energy supply. Further disclosed is a method for operating a lift door (2). |
