A particular 3-phase, 60-Hz, 208-V, 2.5-hp, 2-pole induction machine has the following parameter values: r, = 0.30 Q r; = 0.25 N Xis = 0.40 N XM = 20 1 Xir = 0.40 N %3D %3D The machine is connected to a balanced, 3-phase, 60-Hz voltage supply so that Vsa 12020° V. It is also connected to a mechanical load so that it runs as a motor with slip s = 0.015. The harmonic content of the power drawn by the drive are provided in the table below. %3D Calculate the current drawn by the motor Isa. Calculate the mechanical velocity of the motor in rpm. Calculate the power factor of this motor. A B

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jX,
jX,
Problem 3) The equivalent circuit model
for an induction machine is shown to the
right.
jXM
A particular 3-phase, 60-Hz, 208-V, 2.5-hp, 2-pole induction machine has the following
parameter values:
r; = 0.30 Q
r = 0.25 N
Xis = 0.40 2
XM = 20 2
Xir = 0.40 2
The machine is connected to a balanced, 3-phase, 60-Hz voltage supply so that Vsa =
12020° V. It is also connected to a mechanical load so that it runs as a motor with slip
s = 0.015. The harmonic content of the power drawn by the drive are provided in the table
below.
Calculate the current drawn by the motor Isa:
Calculate the mechanical velocity of the motor in rpm.
Calculate the power factor of this motor.
A
В
C
Transcribed Image Text:jX, jX, Problem 3) The equivalent circuit model for an induction machine is shown to the right. jXM A particular 3-phase, 60-Hz, 208-V, 2.5-hp, 2-pole induction machine has the following parameter values: r; = 0.30 Q r = 0.25 N Xis = 0.40 2 XM = 20 2 Xir = 0.40 2 The machine is connected to a balanced, 3-phase, 60-Hz voltage supply so that Vsa = 12020° V. It is also connected to a mechanical load so that it runs as a motor with slip s = 0.015. The harmonic content of the power drawn by the drive are provided in the table below. Calculate the current drawn by the motor Isa: Calculate the mechanical velocity of the motor in rpm. Calculate the power factor of this motor. A В C
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