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Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
AC
circuits
•Id
ealiz
ed A
C c
ircuit
–am
plit
ude,
phase
–po
wer
•Im
pedance
–re
sis
tance
–re
acta
nce
•S
ingle
com
ponents
–re
sis
tors
–capacitors
–in
ducto
rs
•R
LC
circuit
–re
son
ance
•F
ilters
•T
ransfo
rmers
–po
wer
tran
sm
issio
n
–R
ectifie
rs, A
C-D
C c
onve
rsio
n
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Altern
ating v
oltage
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Idealiz
ed A
C c
ircuit
Eq
uiv
cir
cuit
pHtL
=iHtL v
HtL=
i 0 v
0 s
inHw
tL sinHw
t+fL
=i 0 v
0Asi
n2Hw
tL cosHf
L+si
nHw
tL cosHw
tL sinHfL
pêêê=
1 Dt Ÿ 0D
tpHtL
„t=
1 2 i
0 v
0 c
osHf
L
Z =
im
ped
ance
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Impedance
Zim
ped
ance
Rre
sist
ance
Cre
acta
nce
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Avera
ge P
ow
er
pêêê=
1 2 i
0 v
0 c
osHf
L=
1 2 i
02 z c
osHf
L=
1 2 i
02 R
=i R
MS
2 R
i RM
S=A Ÿ 0
Dt i2 „
tE1ê2=@1 2
i02D1
ê2=
1 è!!!! 2 i
0
Co
mp
are
:
P =
I2R
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Impedance o
f re
sis
tors
toy
v=
iR
i=
v 0 R s
inHw
tL
z=
R,f=
0
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Impedance o
f in
ducto
rsto
y
v=
L„
i
„t i=-
v 0 wL c
osHw
tL=v 0 w
L s
inIw
t-p 2M
z=w
L,f=-
p 2
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Impedance o
f capacitors
toy
v=
Q C=
1 C Ÿi
„t
i=
v0 w
Ccos Hw
tL=v
0 w
Csi
nIw
t+
p 2M
z=
1 wC
,f=
p 2
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
The r
esonant R
LC
circuit
toy I
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
LR
C:
impedance a
nd p
hase
f=
Arc
Tan C
L-C
C
R
z=@R
2+HC
L-C
CL2D1
ê2
=AR
2+Iw
L-
1 wCM2E1
ê2
=RA1
+IL R
wM2 Hw
2-w
02L2 E1
ê2
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
LR
C:
curr
ent
i 0=
v 0 z=
v 0 R
1
B1+L2
R2 w
2 Iw
2-w
02M2F1ê2
i 0=
v 0 R*
wR
Cw`
w0
1w=w
0
R wL
wp
w0
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
LR
C:
pow
er
P=
1 2 i
02 R
=1 2 v
02 z2 R
z>
RA1
+4 IL R
M2 dw
2E1ê2
flDw=
2 dw=
R L
toy 2
Qª
w0
Dw=
è!!!!!
!!!!LêC R
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
RC
filt
ers
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
LC
& R
L f
ilters
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Tra
nsfo
rmers
DV
1=-
N1 „F „t
DV
2=-
N2 „F „t=
N2
N1 D
V1
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Pow
er
transm
issio
n
Phys
208,
Fall
2006
No
v.
15-1
7,
2006
AC
Cir
cuit
s
Rectifiers
and A
C/D
C c
onvers
ion
Eff
ect o
f filte
r is
to
sm
oo
th r
ectifie
d w
ave
form
.