Patent ID: 8493015

Claim:
A door drive comprising electrically operated components ( 2 , 10 ) which are supplied with electrical energy via a mains connection ( 1 ), a control ( 2 ), an electric drive motor ( 10 ), an electrical energy store ( 3 ), wherein the control ( 2 ) separates the door drive from the mains connection ( 1 ) and the electrical energy store ( 3 ) provides The electrical energy in a first operating mode ( 6 ) where the drive motor ( 10 ) is not moved, and the control connects the door drive to the mains connection ( 1 ) and the mains connection ( 1 ) provides the electrical energy in a second operating mode ( 7 ) where the drive motor ( 10 ) is moved, further comprising a charge control which switches into the second operating mode ( 7 ) to charge the electrical energy store ( 3 ) independently of the operating mode of the drive motor ( 10 ), wherein the charge control switches into the second operating mode ( 7 ) in dependence on the period of time which has passed since the last charge cycle.