Q2/460V,25Hp,60Hz,four pole, three phase Y-connected wound rotor induction motorhas the following impedances per phase refered to the stator cirguitR1-0.641 QR2=0.332 Q Χ1=1.106 Ω X2=0.464 QMechanical losses 100W and core losses is 1Kw for slip-2.2%, find1) What is the maximum torque of this motor, At what speed and slip does it occur.2) What is the starting torque of this motor.3) When the rotor resistance is doubled, what is the speed at which the maximumtorque now occurs. What is the new starting torque of the motor.4) What the value of resistance which must be added in rotor circuit to makestarting torque equal to maximum torque.Xm=26.30

Answered: Q2/460V,25Hp,60Hz,four pole, three…

Introductory Circuit Analysis (13th Edition)

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Q2/460V,25Hp,60Hz,four pole, three phase Y-connected wound rotor induction motor
has the following impedances per phase refered to the stator cirguit
R1-0.641 Q
R2=0.332 Q Χ1=1.106 Ω X2=0.464 Q
Mechanical losses 100W and core losses is 1Kw for slip-2.2%, find
1) What is the maximum torque of this motor, At what speed and slip does it occur.
2) What is the starting torque of this motor.
3) When the rotor resistance is doubled, what is the speed at which the maximum
torque now occurs. What is the new starting torque of the motor.
4) What the value of resistance which must be added in rotor circuit to make
starting torque equal to maximum torque.
Xm=26.30

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A three-phase induction motor called a winding rotor motor was developed to provide powerful starting torque for large loads while using very little current. When a smooth start and variable speed are required, induction motors with wound rotors are used.
Synchronous speed is a crucial parameter for magnetic field-type AC motors that spin. It is determined by the frequency and number of magnetic poles. The synchronous speed of an AC motor depends on the frequency of the source and the number of poles. The frequency is multiplied by 60 and divided by the number of pole pairs to determine RPM.

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