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Given data,(1)Separately excited DC Dóve 25kw,50V" Speed "(N)=3000" rpm "If E > V=> machine acts as generatolE < V=> machine acts as motor.a){:[" Terminal voltage "{:(V_(t))=55(V)}∈<V=>" Drive acts as motor. "],[k=50V],[" Ra "],[V_(t)=E+I_(a)R_(a)],[T_(a)=(V_(t)-E)/(R_(a))=(55-50)/(0.012)=416.67A],[I_(a)=416.67A],[" Armature current "],[rarr" Input power "(f_(in))=V_(t).I_(a)=55 xx416.67=22916.85WquadP_("in ")=22916.85w],[rarr" mechanical power dweloped "(P_(m))=E_(b)*T_(a)=50 xx416.67=20883.5WquadP_(m)=20883.5W]:}rarr" Torque dweloped "(T)=(P_(m))/(omega)quad;quad omega=(2pi N)/(60)=(2pi xx3000)/(60)=314.16rad//sScanned with CamScannerT=(20883.5)/(314.16)=66.47N-mquad T=66.47Nm(2)(b) Terminal voltage {:[(V_(t)),=44V],[epsi,=50V]}E > V=> machine ats as generctor{:[rarr" mechanicaf poower deculoped "(P_(n))=E*I_(a)],[" Armature current "(I_(e))=500A],[P_(n)=50 xx500=25000WquadP_(m)=25kW],[rarr" Outsut town "(P_("out "))=v_(t)*" I "_(a)=44 xx500=22000wquadP_("out ")=22kw],[rarr" Torque dealopen "(T)=(P_(m))/(omega)=(25000)/(314.16)=79.57Nmquad T=79.57Nm]:}(c) Te ... See the full answer