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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
Three-Phase AC–DC Converters 11-11
Based on the measured DC link voltage u
dc
and the duty cycles of modulator D
a
, D
b
, D
c
, the virtual ux
Ψ
L
components are calculated in stationary (α-β) coordinates system as follows:
Ψ
L dc a b c L
u D D D dt Li
α α
= +
+
2
3
1
2
( )
(
11.25a)
Ψ
L dc b c L
u D D dt Li
β β
=
+
1
2
( )
(
11.25b)
11.2.3.3
I
nstantaneous Power Calculation Based on Voltage Estimation
e
i
nstantaneous
v
alues
o
f
a
ctive
(p) a
nd
r
eactive
p
ower
(q) i
n
A
C
v
oltage
s
ensorless
s
ystem
a
re
e
stimated
b
y
E
quations
1
1.26.
F
irst
p
art
o
f
b
oth
e
quations
r
epresents
p
ower
i
n
t
he
i
nductance
a
nd
t
he
s
econd
p
art
i
s
t
he
p
ower
o
f
t
he
P
WM
A
C–DC
c
onver ...
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Publisher Resources

ISBN: 9781439802861