series winding

The series winding was supplemented by resistance- boxes, also capable of being plugged in or out of circuit.

Bipolar with series windings.

Shunt and series field-windings were added to the motor, and the series windings could be plugged in and out of circuit as desired.

With the latter two series winding down toward the end of their runs on NBC, the pressure on Mr. Zucker to come up with replacements is increasing.

Although the system is prone to the currents in the two halves of the load becoming unbalanced, this can be corrected by the provision of extra series windings which act like an additional circuit resistance.

Since the impedance of the series winding of the transformer is very small compared to that of the excitation branch, all of the input voltage is dropped across the excitation branch.