A 3-phase Y-connected induction motor is connected to a (240+XY) volts, 60 Hz power supply. The number of poles are 4 and per phase parameters are R1 (0.5 - X/100) 2, X, 0.7Y 2, R2 0.4 2, X: = 0.9X 2, and Xm = 40 2. The per phase core loss is 4s w, and the total friction and windage loss is 160 W. When the motor operates at a slip of 4 %, determine: a. The input current b. The power developed c. The shaft torque d. The efficiency of the motor.

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x=7 x-8
A 3-phase Y-connected induction motor is connected to a (240+XY) volts, 60 Hz power supply. The
number of poles are 4 and per phase parameters are R1 = (0.5 - X/100) 2, X, = 0.7Y 2, R2 = 0.4 2,
X2 = 0.9X 2, and Xm = 40 2. The per phase core loss is 45 W, and the total frietion and windage loss
is 160 W. When the motor operates at a slip of 4 %, determine:
a. The input current
b. The power developed
c. The shaft torque
d. The efficiency of the motor.
Transcribed Image Text:x=7 x-8 A 3-phase Y-connected induction motor is connected to a (240+XY) volts, 60 Hz power supply. The number of poles are 4 and per phase parameters are R1 = (0.5 - X/100) 2, X, = 0.7Y 2, R2 = 0.4 2, X2 = 0.9X 2, and Xm = 40 2. The per phase core loss is 45 W, and the total frietion and windage loss is 160 W. When the motor operates at a slip of 4 %, determine: a. The input current b. The power developed c. The shaft torque d. The efficiency of the motor.
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