End stop damping method for an actuator and actuator for an internal combustion engine

摘要

The method involves disconnecting a direct current motor (3), before it reaches its end position, from voltage generators (1, 2), so that a voltage is induced in stator winding by movement of rotor caused by spring loading. The voltage is induced in coil till blocking voltage of a zener diode (4) is exceeded by the induced voltage so that the motor is short-circuited by the zener diode. The motor is short circuited until the blocking voltage of the zener diode exceeds the induced voltage. Hence braking of dc motor can be selected according to choice of blocking voltage of zener diode : An independent claim is also included for an operating device for an internal combustion engine.