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EEL 3211
Test 4
April 23, 2008
Time limit: 50 minutes, Closed note, closed book, one (1) 8½ x 11 sheet of notes allowed.
A 208V, fourpole, 60Hz, Yconnected induction motor is rated at 10 kW. Its equivalent circuit
components are:
1212
0.2
0
,
0.0
5
,
0.4
0
,
0.4
0
,
10.0
300W
,
0W
,
200W
M
mechanica
l
mis
c
core
RRXXX
P
PP
=Ω =Ω =Ω =Ω
=Ω
=
≈=
For a slip
s
= 0.05 find:
a)
(10%) The line current
I
L
(magnitude and phase).
b)
(10%) If the line current were
8
4
36
L
I
=
∠
°
, find the stator copper loss
P
SCL
.
c)
(10%) For the line current given in part (b) find the air gap power
P
AG
.
d)
(10%) If the air gap power were
P
AG
= 20 kW find the power converted from electrical to
mechanical form
P
conv
.
e)
(10%) For an air gap power of
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This note was uploaded on 07/28/2011 for the course EEL 3211 taught by Professor Staff during the Summer '08 term at University of Florida.
 Summer '08
 Staff

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