rectifiers simulation
DESCRIPTION
Power Supply of 12V @ 1ATRANSCRIPT
CONVERTER SIMULATIONSDC Supply (12V @ 1A)
Presented By FA13-R09-005 Muqadsa Iftikhar
FA13-R09-013 Zunaib Ali FA13-R09-024 Madiha Naeem
DC Supply
Fig. 1(a): AC to AC Transformer followed by Uncontrolled Rectifier
LOAD
+V0-
I0~
ACDC
_
~
ACAC
~
AC Supply
220V ac is converted to desired value of ac and then uncontrolled rectifier is used to convert it to DC.
DC Supply
LoadAC
Supply
+V0-
I0
DCDC
_
~
ACDC
_
_
Fig. 1(b): Uncontrolled Rectifier followed by DC-DC Converter
Uncontrolled rectifiers are used to produce a fixed dc from a fixed ac and at the output of rectifier a dc chopper circuit is used which provide variable dc just by changing the duty cycle
DC Supply
Fig. 1(a): Controlled Rectifier feeding Load
LoadAC
Supply
+V0-
I0~
ACDC
_
Applied voltage can be made variable by using controlled rectifiers which provide variable dc from a fixed ac
DC SupplyTable: Performance Parameters for Rectifier
DC SupplyPerformance Parameters for Rectifier
From formulas mentioned above we can say that:
•The lower the value of RR from unity the lower will be the circuit performance.
•The greater the value of the FF from unity lower will be the circuit performance.
• The lower the value of TUF from unity the lower will be the circuit performance...
•The greater the value of the RF from zero lower will be the circuit performance....
ConversionTransformer followed by Uncontrolled Rectifier
Continuous
powergui
ac input
12.06
Voltage
1 2
Transformer
In1
Specturm
Scope4
Scope2
Scope10
signal rms
RMS4
R
0.999
Power Factor
v+-
O/P Voltage
I nMean
Mean Value1
I nMean
Mean Value
signal
magnitude
angle
Fourier
Irms
I1rms
Theta
DSTF
DSPF
PF
zunaib
EmbeddedMATLAB Function
0.999
Distortion Factor
1
Displacement Factor
D4
D3 D2
D1
1.005
Current
i+ -
Ammeter1
i+ -
Ammeter
ConversionTransformer followed by Uncontrolled Rectifier
0 120 240 360 480 600 7200
20
40
60
80
100
frequency
Har
mon
ics
Mag
nitu
de
Full wave
0 0.005 0.01 0.015 0.02 0.025 0.03 0.0350
5
10
15
20
time
Rec
tifie
r O
utpu
r
Full wave
ConversionTransformer followed by Uncontrolled Rectifier
S.No Performance Parameters Calculated Values
1 Rectification ratio (RR) 0.81
2 Form factor (FF) 1.11
3 Transfer Utilization Factor (TUF) 0.81
4 Ripple Factor (RF) 0.482
Table # 2: Observed values of RR, FF, TUF & RF taken from Matlab command window
ConversionUncontrolled Rectifier followed by DC-DC Chopper
Continuous
powerguiv+
-
Voltage Measurement
Scope3
Scope
274.4
Rectified Voltage
In Mean
Mean Value1
I n Mean
Mean Value
[A]
From1
Diode3
Diode2
Diode1
Diode
Conn1
Conn2
Converter
C3
12.05
Buck Output
AC Voltage Source
Rectifier followed by Chopper
ConversionUncontrolled Rectifier followed by DC-DC Chopper
2
Conn2
1
Conn1
t
v+-
Vo V
R
PulseGenerator
In Mean
Mean Value2
L
i+ -
Io
g
CE
IGBT/Diode [A]
Goto1
1.03
Display1
D
Clock
C2C1
A
Chopper
ConversionUncontrolled Rectifier followed by DC-DC Chopper
Chopper Output
0 0.005 0.01 0.015 0.02 0.025-2
0
2
4
6
8
10
12
14
16Output of Chopper
time
Rec
tifie
r O
utpu
r
ConversionUncontrolled Rectifier followed by DC-DC Chopper
0 120 240 360 480 600 7200
10
20
30
40
50
60
70
80
90
100
frequency
Har
mon
ics
Mag
nitu
de
rectifier with chopper
Output Voltage Equation in case we use Capacitive Filter
Value of Ra
ConversionControlled Rectifier
Continuous
pow ergui
v+-
Voltmg
m
ak
T4
gm
ak
T3
gm
ak
T2
gm
ak
T1
In1
Specturm & other blocks
Scope5
Scope1
Scope
signal rms
RMS4
R
0.9704
Power Factor
I n Mean
Mean Value2
I n Mean
Mean Value1
signal
magnitude
angle
Fourier
Irms
I1rms
Theta
DSTF
DSPF
PF
zunaib
EmbeddedMATLAB Function
0.9762
Distortion Factor
0.994
Displacement Factor
12.4
Converter Output Voltage
1.008
Converter Output Current
i+ -
C1
i+ -
C
AC
3 & 4
1 & 2
ConversionControlled Rectifier
0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018-5
0
5
10
15
20
25
time
Rec
tifie
r O
utpu
r
Controlled
ConversionControlled Rectifier
0 120 240 360 480 600 7200
20
40
60
80
100
120
frequency
Har
mon
ics
Mag
nitu
de
Controlled Rectification
ConversionControlled Rectifier
Performance Parameters Calculated Values
RR 0.5629
FF 1.3328
TUF 0.4944
RF 0.8811