Drive system for operating an electric device

摘要

The invention relates to a drive system 1 for operating an electric device. The drive system 1 comprises an electric motor 3 having a permanent magnet rotor 6 connectable to the electric device for controlling the operation of it by a limited-angle rotation, the electric motor 3 further comprising a stator winding 8. The drive system 1 further comprises a drive circuit 2 connected to the stator winding 8. The drive system 1 is characterised in that the permanent magnet rotor 6 is arranged to be aligned to a magnetic field created by the stator winding 8 when supplied with current from the drive circuit 2, so that a maximum torque is applied to the rotor 6 and thereby to the movable part within an interval of ±25 degrees around a middle position between two end positions of said limited-angle rotation of said rotor 6.