Determine the induced armature voltage in the DC machine operating as a motor and running at
1800 rpm with flux equal to 0.05 Wb and constant K as 24.
A 240-V 100-A DC motor has both shunt and series windings. Its characteristics are
RA = 0.14 Ohm NF = 1500 turns RS = 0.05 Ohm NSE = 15 turns RF = 200 Ohm nm = 1800
rpm Radj = 0 to 300 Ohm currently set to 120 Ohm. Use EA Vs If given below if needed.
A) The motor described above is connected as shunt motor
1. What is the no load speed of this motor when Radj = 120 Ohm
2. What is its full-load speed?
B) The motor described above is now connected as cumulatively compounded DC motor with
Radj = 120 Ohm
What is the full-load speed of this motor?