a. The per phase equivalent circuit of a 460 VL, 8-pole, and 60-Hz, Y-connected induction motor shown in Figure 2 has the following impedances: R1 = 0.77 2 X1 = 1.3 2 XM = 19 2 R2 = 0.8 2 X2 = 0.72 2 I, R, jX, jX2 R/s I, V, Figure 2 At slip = 2.6%, the frietion and windage losses, Prw = 80 W, stray losses Pstray = 20 W, and core losses Pcore = 2.25 kW, calculate: i. The synchronous and motor speeds. ii. The stator current Ii, consider the effects of magnetizing branch Xm, where I # I2. II. The power factor, is it lagging, leading or unity? iy The electromechanical P. and outnut power P.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.33MCQ: The direct electrical connection of the windings allows transient over voltages to pass through the...
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a. The per phase equivalent circuit of a 460 VL, 8-pole, and 60-Hz, Y-connected induction
motor shown in Figure 2 has the following impedances:
R1 = 0.77 2
XI = 1.3 2
XM = 19 2
R2 = 0.8 2
X2 = 0.72 2
I,
R,
jX,
jX2
R/s
I,
V,
Figure 2
At slip = 2.6%, the frietion and windage losses, Prw = 80 W, stray losses Pstray = 20 W, and
core losses Pcore = 2.25 kW, calculate:
i. The synchronous and motor speeds.
The stator current Ii, consider the effects of magnetizing branch Xm, where I # I2.
ii.
iii.
The power factor, is it lagging, leading or unity?
iv.
The electromechanical Pmech and output power Pout-
V.
The efficieney of the motor.
Transcribed Image Text:a. The per phase equivalent circuit of a 460 VL, 8-pole, and 60-Hz, Y-connected induction motor shown in Figure 2 has the following impedances: R1 = 0.77 2 XI = 1.3 2 XM = 19 2 R2 = 0.8 2 X2 = 0.72 2 I, R, jX, jX2 R/s I, V, Figure 2 At slip = 2.6%, the frietion and windage losses, Prw = 80 W, stray losses Pstray = 20 W, and core losses Pcore = 2.25 kW, calculate: i. The synchronous and motor speeds. The stator current Ii, consider the effects of magnetizing branch Xm, where I # I2. ii. iii. The power factor, is it lagging, leading or unity? iv. The electromechanical Pmech and output power Pout- V. The efficieney of the motor.
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