Actuator with an electric motor

An actuating drive, comprising:

• a torque controller;
• a controlled system;
• an electronically commutated electric motor that operates with a position-dependent summed torque and that, using the torque controller and the controlled system, is adjusted to a selectable torque-dependent setpoint value according to a continuously increasing torque-time characteristic curve, the torque controller receiving a torque-dependent actual value of the electronically commutated electric motor in addition to the selectable torque-dependent set point value to derive a control signal;
• and
• a position controller downstream of the torque controller;
• wherein the torque controller is configured to emit the control signal as a setpoint position and feeds it to the position controller, until a predetermined threshold torque that is smaller than a maximum torque of the electronically commutated electric motor is reached, the setpoint position is fed unchanged to the position controller and is used together with an actual position of the electronically commutated electric motor to derive the control signal for the controlled system, and subsequent to exceeding the predetermined threshold torque, the setpoint position is fed to the downstream position controller as a changed setpoint position until a predetermined setpoint position is reached, the changed setpoint position being repeatedly increased in an abrupt manner according to an increase in following peak values of an increasing summed torque.