A 250V, 50A separately excited DC motor has armature resistance of 0.8 ohms (including brushes) and...
A 250V, 50A separately excited DC motor has armature resistance of 0.8 ohms (including brushes) and field resistance of 100 ohms. Kf for this motor is 1.5 V/(A.rad/sec). The armature circuit can carry up to 50A for a short time period. It is desired to run it with a 250 V voltage source in no load conditions with the speed of 1500 r/min.
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a) Explain the required equipment and steps.
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b) Draw the circuit for steady-state operation with the speed of 1500 r/min.
Homework Answers
back f= 210V, torque=75 N-m,
power= 11.78 KW , input power = 12.5 KW , efficiency= 94.2% .
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A 250V, 50A separately excited DC motor has armature resistance
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