Assuming n=m=1 A 120+m -V , 2400+n-rpm shunt DC motor has a armature resistance 0.4+0.1*m ohm...

Assuming n=m=1

A 120+m -V , 2400+n-rpm shunt DC motor has a armature resistance 0.4+0.1*m ohm and a shunt field resistance of 160+m Ohm . The motor operates at its rated speed with full load which takes 15+m Amp. A small of current of 2+.1*m A at no load due to rotational loses. Assume that rotational loss is proportional to the speed.

Find

a. Field current at no load

b. Armature current at no load

c. Rotational loss at no load

d. Armature current at Full load

e. No load speed

f. Rotational loss at full load

g. Efficiency of this motor

Expert Solution

Manojponduru answered 3 months ago

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