Braking device for a movable door leaf and door closer having such a braking device

A braking device (28) for a movable door leaf, having a first generator (30) with first terminals (32) and a second generator (30′) with second terminals (32′) configured to generate, at the output terminals (32) of which, a generator voltage to charge a charging circuit (36) for supplying an open-loop and closed-loop control unit (38), the control unit configured to control an electric braking device (40), comprising a braking motor, the electric braking device configured to generate an effective braking force for damping the movement of the door leaf, wherein the first generator (30) includes a first generator shaft (42), which is rotatable for generating the generator voltage with the discharging of a first generator energy storage device (44), corresponding to the first generator (30), which is charged by a respective opening movement of the door and is mechanically decoupled from an axis of rotation of the door during a respective closing movement of the door, and discharges in the state mechanically decoupled from the door leaf or the axis of rotation of the door leaf, and a second generator shaft (42′) of a second generator (30′) is rotatable for generating a generator voltage with the discharging of a second generator energy storage device (44′), corresponding to the second generator (30′), which is charged by a respective closing movement of the door and is mechanically decoupled from the axis of rotation of the door during a respective opening movement of the door, and discharges in the state mechanically decoupled from the door leaf or the axis of rotation of the door leaf.