A 3 phase, 400V, 4-pole, 50 Hz slip ring induction motor has its stator winding delta connected and its rotor winding star connected. The standstill voltage measured between slip rings with the rotor open circuited is 200V. The stator resistance per phase is 0.5Ω and the stator reactance per phase is 2Ω. The rotor resistance per phase is 0.05 and the rotor reactance per phase is 0.25Ω Determine:
a) maximum torque
b) slip at which maximum torque occurs
c) If the ratio of full load to maximum torque is 1:1.2, find the full load slip and the power output Refer all values to the stator.
