PPT Slide
Section 13.5: Performance Equations cont.
The field current is If = Vt/Rf = 250V./125W = 2A. so (by KCL), the armature current at full load is: Ia = I - If = 52A. - 2A. = 50A.
By KVL, EFL = Vt - RaIa = 250V. - 0.25W´50A. = 237.5V.
and the corresponding (full-load) speed nFL is unknown.