The shaft power of a shunt motor is 7.8 Hp. It draws 50 Amperes from 120 Volts. The field winding draws 1.2 Amps. What is the efficiency of the motor? Answer: 96.98%
The armature and field current of a 230 Volts shunt motor have resistances of 0.31 and 115 ohms respectively. It takes 52 Amps when operating at a certain load. If the counter emf is 214.5 Volts, what is the Hp developed? Answer: 14.4 Hp
A 440 Volt shunt motor has an armature resistance of 0.8 ohms and a field resistance of 200 ohms. What is the back emf when giving an output of 7.46 kW at 85% efficiency? Answer: 425.8 V