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A squirrel cage induction machine having an rated slip of x% of load having the starting torque different from the full load torque. The induction machine is operating at lowest value of power factor. A separately excited star connected induction machine of 3-phase, 3 pole, 120V, 50Hz impedances r1 = 1.0, r2 = 0.5, x1=x2= 1.2, all the values are in per unit.
When the stator current got constant, the armature current and starting torque will reduced to?. The supply voltage to supply frequency (V/f) is constant, find the constant speed at 38Hz? Also determine the speed of the cascde set? Also determine the braking torque? The effective rotor resistance in the backward branch of the equivalent circuit will be?
 
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