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Title: Dual power supply - full project report
Description: this is a 14 page full project report of Dual power supply. This report investigates the design and test a of a dual power supply delivering up to 1 amp at + - 15 Volts. Firstly I formulated and recorded the outline project specifications for the dual power supply. Secondly, I've described what a dual power supply is and how it works including its advantages, disadvantages and components used. I also completed a multisim circuit for the dual power supply of components we used. A brief description on how the DPS works mentioned . After that I did some experiment on the effect of a load on the output voltage, and also the effect of capacitors on the circuit. Finally, an appropriate project plan for the dual power supply is produced .
Description: this is a 14 page full project report of Dual power supply. This report investigates the design and test a of a dual power supply delivering up to 1 amp at + - 15 Volts. Firstly I formulated and recorded the outline project specifications for the dual power supply. Secondly, I've described what a dual power supply is and how it works including its advantages, disadvantages and components used. I also completed a multisim circuit for the dual power supply of components we used. A brief description on how the DPS works mentioned . After that I did some experiment on the effect of a load on the output voltage, and also the effect of capacitors on the circuit. Finally, an appropriate project plan for the dual power supply is produced .
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Table of contents
Introduction
...
2
Components of DPS
...
2
How does a dual power supply works
...
4
Parts needed to design the project (specifications)
...
4
The circuit
...
5
Graph of C against ripple:
...
6
Effect of input voltage on output voltage:
...
10
Self evaluation
...
11
References:
...
T
...
Firstly we formulated and recorded the outline project specifications for
the dual power supply
...
We also completed a
multisim circuit for the dual power supply of components we used
...
After that we did some experiment on the effect of
a load on the output voltage, and also the effect of capacitors on the circuit
...
What is a Dual power supply
A power supply is a major component that is used to supply power to electrical hardware
...
Also it adjusts the power to an ideal amount to get electronics to run as smooth as
possible
...
By contrast, it has three outputs; the positive, the negative
and the zero
...
Components of DPS
a) The transformer: this part of the circuit steps down high voltage from the main
AC to a low one
...
b) The rectifier: it changes the AC voltage to a DC voltage
...
d) Stabilizer: it is responsible for removing any ripples by setting a fixed output
voltage
...
Different advantages of this power
supply may also include:
1) A dual power supply ensures a continuous and uninterrupted flow of
power from the source to the device
...
Double phase circuit ensures that when one phase is
Final submission
Page 2
malfunctioning, the other boosts constant power
...
2) It ensures a greater source of power, as the power in this circuit is
doubled as well
...
Whereas in reality, one important advantage
of a dual power supply is, that it does not affect the temperature of the
casing regardless of the power it generates
...
How does a dual power supply works
A dual power supply is where two power sources are put into one single unit
...
P
...
The latter is often referred to as “dual tracking mode”
...
Changing from the dual track mode
to the independent one is feasible by a switch on the front panel of the circuit
...
It is very common for this supply to be implemented in circuits that use
opmaps as a requirement
...
15volts on each half of the secondary winding with different polarities, D1 and D3
blows a full rectifying wave capable of producing positive 15volts, whereas D2 and D4
provide a full wave capable of producing negative 15volts
...
IC1 and IC2 are
the positive and negative regulators in this circuit
...
314£
CAPACITOR ALUM ELEC 2200uf (x2)
2
...
19£
STMICROELECTRONICS, IC, V REG +15V, 7815
0
...
32£
VISHAY FORMELY I
...
51£
BOURNS JW MILLER-PM61300-5-RC-SMD CCFL, TRANSORMER
1
...
02£
490-000 MAIN PLUG 3A
0
...
14
...
An ideal filter capacitor would produce
dc non-ripple line
...
However in many cases, further cauctions have meen made regarding this, so
proffessionals try and put particular capacitors and also design the circuit in a way that
makes the output voltage varies just a little regardless of the loads connected to the circuit
...
7
15
...
5
15
...
3
15
...
1
15
14
...
8
14
...
As seen above the IL increases along
VL
RL
VL
IL
Ripple (ac)
0/C
15
...
93uv
5k
15
...
07
2
...
1
7
...
62uv
1
...
006
6
...
97
14
...
54uv
800Ω
14
...
018
18
...
88
0
...
86uv
300Ω
14
...
049
0
200Ω
14
...
074
0
100Ω
14
...
148
0
(b) Plot Ripple against IL
Final submission
Page 6
Ripple
160
140
120
100
80
Ripple
60
40
20
0
-2
-20 0
2
4
6
8
10
12
14
16
Here, we see that whenever the IL increases, so does the ripple
...
However there is a certain limit to that, for
instance, in a case of a voltage drop of 10v in output, the regulators are able(within their
functionality) to regulate the “less” 10v and able to boost it by same amount of voltages
that had been lost, and vice versa
...
95
14
...
85
VL
14
...
75
14
...
Vac
480v
450v
420v
375v
300v
270v
225v
150v
Vin/o
48
45
42
37
...
5
15
VL(DC)
14
...
93
14
...
935
14
...
921
14
...
747
Calculate:
(a) Load regulation=
𝑐ℎ𝑎𝑛𝑔𝑒 𝑖𝑛 𝑜𝑢𝑡𝑝𝑢𝑡 𝑣𝑜𝑙𝑡𝑎𝑔𝑒
𝑐ℎ𝑎𝑛𝑔𝑒 𝑖𝑛 𝑜𝑢𝑡𝑝𝑢𝑡 𝑐𝑢𝑟𝑟𝑒𝑛𝑡
...
76
Load regulation = 10
...
100= 7
...
194
330
...
100 = 0
...
Voltage regulators can be very smart not only regarding voltage regulation but also when
there is a slight drop or raise in the input voltage; these regulators can act in an efficient
way accordingly to adjust the voltage to its demanded level of output
...
After finishing the project I was able with the help of Multisim to design a dual power supply
that is able to produce 15 voltages ±
...
A typical market for a DPS is medical
facilities and labs where experiments are carried out by scientists and technicians
...
Any raise in the input power supply may affect the whole
components of the circuit
...
Self evaluation
During the study of the dual power supply, I tried to accomplish the demands of my tutor
...
I’m still having some difficulties finding the exact right components and the also the exact
number of them
...
Designing this complex power supply was a bit challenging for me at the beginning, but
having to work alongside with my tutor taught me how to design it as well as stimulate it
...
Final submission
Page 10
Logbook:
Week
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Introduction to the course
Groups selected for
project
Assigned to research dual
power supply
Completed Multisim
circuit
Completed Introduction
and planning
Preparation for
presentation
Interim submission
Searched for the project
costs
We experimented and
have drawn a graph on the
effects of changing the
values of capacitors on
Ripples
We’ve found out the
effects of different loads
on the Output voltage
We’ve found out the
effects of the Input on the
Output
Final submission
Page 11
15
A conclusion was
successfully produced
All students were
evaluated according to
their contribution of the
project
Each student performed a
self presentation before
Mr
...
Jay and Miss Nada
Abdalla
The Final
Submission was
handed in
Final submission
Page 12
References:
1
...
techterms
...
http://electronicsclub
...
htm (website visited on the 24th of May, 2013)
3
...
doityourself
...
“Electron Devices & Circuits-Principles & Applications” by N
...
Deshpande
5
...
K
...
www
...
farnell
Title: Dual power supply - full project report
Description: this is a 14 page full project report of Dual power supply. This report investigates the design and test a of a dual power supply delivering up to 1 amp at + - 15 Volts. Firstly I formulated and recorded the outline project specifications for the dual power supply. Secondly, I've described what a dual power supply is and how it works including its advantages, disadvantages and components used. I also completed a multisim circuit for the dual power supply of components we used. A brief description on how the DPS works mentioned . After that I did some experiment on the effect of a load on the output voltage, and also the effect of capacitors on the circuit. Finally, an appropriate project plan for the dual power supply is produced .
Description: this is a 14 page full project report of Dual power supply. This report investigates the design and test a of a dual power supply delivering up to 1 amp at + - 15 Volts. Firstly I formulated and recorded the outline project specifications for the dual power supply. Secondly, I've described what a dual power supply is and how it works including its advantages, disadvantages and components used. I also completed a multisim circuit for the dual power supply of components we used. A brief description on how the DPS works mentioned . After that I did some experiment on the effect of a load on the output voltage, and also the effect of capacitors on the circuit. Finally, an appropriate project plan for the dual power supply is produced .