Low-current And High-current Applications
In some cases, the DC bias current is small (under
As, for example, in telecom transformers where a winding
is in series with the DC power supply current to the telephone.
In other cases, the DC bias current is much larger, such
as in inductors used as output filters on power supplies:
In all these cases, the wound component must retain a
specified inductance with the rated dc current flowing in the winding.