Abstract: An electromotor can be selectively actuated for operation in both rotational directions. In the condition of the electromotor not energized with current, respectively one rotational direction of the electromotor is blocked and one rotational direction remains movable in a free-running manner. The circuit includes first and second diodes forward-connected from ground to first and second motor terminals, a respective change-over switch connecting each motor terminal selectively to power or ground, and a free-run blocking switch interposed preferably between one of the motor terminals and its associated change-over switch.

Abstract: The invention relates to a circuit arrangement of an electromotor comprising two terminals, in which the electromotor can be actuated for operation for both rotational directions, and in which, in the condition of the electromotor not energized with current, respectively one rotational direction of the electromotor is blocked and one rotational direction remains movable.

Abstract: The invention relates to a method for controlling an electric motor in which each of its terminal contacts can optionally be connected via the changeover contacts of controllable changeover switches to one of the two poles of a power supply source and the changeover switches are switched over in order to reverse the electric motor.