EBK PRINCIPLES OF ELECTRIC CIRCUITS
10th Edition
ISBN: 9780134880068
Author: Buchla
Publisher: VST
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2) A 208 V, four-pole, 60 Hz, Y-connected, wound-rotor induction motor has a rated power of 30 HP. The components of its equivalent circuit are R1 = 0.100
R2 = 0.070
XM = 10.0
X1 = 0.210
X2 = 0.210
Pmec = 500 W
Psup ~ 0
Pcore = 400 W
For a slip of 0.05, find:
a) The line current
b) The stator copper losses PcE
c) The air gap power PEF
d) The power converted from mechanical to electrical form Pconv
e) The induced torque _ind
f) load torque _load
g) The total efficiency of the machine
h) The speed of the motor in revolutions per minute and in radians per second
5. There are three sources that would affect the current flow in this circuit. Find the current
through the 4k2 resistor that is caused solely by the 24V source (i.e., remove the 2mA and
12V sources using the correct methods).
(20 points)
24 V +
9k,
ww
www
4kS
2mA
24ΚΩ
www
++
12V
www
6k
24ΚΩ
"Can you explain the method of finding the
direction?"
the electric field in free space is given by
ety
E: 50 Cos [2π 10 t - Bz ]
a) find the direction of the wave propagation
b) Calculate W, B, A, S
V/m
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