A 120+m -V , 2400+n-rpm shunt DC motor has a armature resistance0.4+0.1*m ohm and a shunt field resistance of 160+m Ohm . The motoroperates at its rated speed with full load which takes 15+m Amp. Asmall of current of 2+.1*m A at no load due to rotational loses.Assume that rotational loss is proportional to the speed.
Find
- Field current at no load
- Armature current at no load
- Rotational loss at no load
- Armature current at Full load
- No load speed
- Rotational loss at full load
- Efficiency of this motor
n=1
m=1
