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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
23-11Power Factor Measurement
23.3.4.3 Power Calculations
Calculating
po
wer
de
livered
to do wo
rk
fo
r
a no
nlinear
lo
ad
is so
mewhat
mo
re
co
mplicated
th
an
if th
e
current were sinusoidal. If the fundamental component of the voltage at frequency f is taken as a refer-
ence
(t
he
a-
phase
fu
ndamental
fo
r
a po
lyphase
sy
stem),
th
e
su
bscript
“1
me
ans
th
e
fu
ndamental,
an
d
Ed
enotes
t
he
p
eak
v
alue
o
f
t
he
v
oltage;
t
hen,
t
he
v
oltage
c
an
b
e
e
xpressed
a
s
ε π
a1(t) a1
= + °E ftsin( )2 0
e voltage fundamental will then have an amplitude E
a1
and pass through zero in the positive-going
di
rection
at ti
me
t = 0. If h = ha
rmonic
nu
mber,
an
d
E
h
and I
h
are peak amplit
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Publisher Resources

ISBN: 9781439848913