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Power Electronics and Motor Drives
book

Power Electronics and Motor Drives

by Bogdan M. Wilamowski, J. David Irwin
October 2018
Intermediate to advanced content levelIntermediate to advanced
1015 pages
40h 24m
English
CRC Press
Content preview from Power Electronics and Motor Drives
AC Machine Windings 2-21
2.3.2 Rotating Magnetic FieldinSquirrel
Cage Windings
e squirrel cage can be considered as an atypical case of poly-
phase
w
indings,
a
nd
i
t
i
s
f
requently
u
sed
a
s
a r
otor
w
inding
i
n
i
nduction
m
achines.
I
n
f
act,
i
n
e
ach
c
onductor
(
or
b
ar)
o
f
t
he
c
age,
t
he
c
urrent
i
s
d
ierent
f
rom
t
he
c
urrents
i
n
t
he
o
ther
b
ars,
a
nd
a
s
a c
onsequence,
e
ach
b
ar
c
an
b
e
c
onsidered
a
s
a p
hase
w
inding.
From
t
his
p
oint
o
f
v
iew,
t
he
s
quirrel
c
age
i
s
a p
olyphase
winding with a phase number m equal to the number of bars,
N
R
, and each phase is constituted by a unique conductor (Z
f
= 1)
(
Figure
2
.18).
In
a
ddition,
t
he
c
age
w
inding
d
oes
n
ot
h
ave
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Publisher Resources

ISBN: 9781439802861