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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
10-6 Power Electronics and Motor Drives
phasors v
s
and
I
s
whose moduli correspond to the variable rms values. e use of Equation 10.5 leads to
e
xpress the voltage and current space phasors as follows:
v V e
i I e
s
s
s
s
j t
v
j t
v i
=
=
2
2
( )
( )
ω ϕ
ω ϕ ϕ
(
10.9)
ese vectors present constant moduli and rotate at positive ω angular speed.
In
c
ase
o
f
a
n
a
nticlockwise
v
oltage
s
ystem
v V t
q
s s
q v
= + 2 cos( )ω ϕ∆
,
t
he
i
q
s
expression becomes
i I
t
q
s s
q v i
= + 2 co s( )ω ϕ ϕ∆
.
e
c
orresponding
s
pace
p
hasors
t
hat
r
esult
f
rom
t
he
u
se
o
f
E
quation
1
0.5 can be written as
v V e
i I e
s
s
s
s
j t
v
j t
v i
=
=
2
2
( )
( )
ω ϕ
ω ϕ ϕ
(10.10)
ese vectors rotate ...
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Publisher Resources

ISBN: 9781439802861