Stepping motor in the constant current operation and guided in the voltage operation

摘要

A winding (3) behaving as an inductance with an ohmic component draws current from a regulator (4), to whose output (6) is added (S1) the back EMF generated (G) by the rotation. - The measured motor current is fed back (11) for comparison (S2) with the set-point provided by the auxiliary integral controller (10) with allowance (S3) for the current rating (Inenn). Input to the controller (10) is adjusted (S4) by feedback (8) from the output of the main regulator (4) to reduce the set-point (Isoll) as the limit is approached.