DEVICE FOR DETERMINING THE POSITION OF A BATTERY OPERATED CONTROL MOTOR WITH COMMUTATOR

摘要

In a device for determining the position of a battery operated control motor (2) with commutator, a pulse voltage is deflected from the current outages caused by the commutator in the supply line (3) of the control motor (2), which pulse voltage is led to the counting inlet of a counter (6) via a pulse shaping step (5), the counter value of the counter being a measure for the position of the control motor (2). To avoid an ohmic resistor or blind resistor in the supply line (3) for the registration of the pulse voltage, the pulse voltage is tapped directly from the battery 1, utilising its inner resistance.