This is a presentation slide of a course named "Power Station" in American International University-Bangladesh.

1. Course Name : POWER STATIONS
Course Instructor : RETHWAN FAIZ
Section : “ C “

2. FINAL TERM PRESENTATION
GROUP 02
GROUP MEMBERS
01 ISLAM, MD SAIFUL 15-29316-1
02 ROY, IMON KALYAN 14-27744-3
03 ALAM, MOHD. NAFIUL 14-28218-3
04 RAHMAN, MD. TASFIQ-UR 14-27732-3
05 ZEYAD, MOHAMMAD 14-28154-3
06 BISWAS, PRODIP 14-28156-3
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3. PRESENTATION TOPIC
“Working Process of Different Types of Power
Supply Circuits”
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4. INTRODUCTION
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 Power supply is the basic needs of any
electronics that we use regularly.
 It is a source supply to a circuit as it’s
expected voltage and current rating.
 It may be a charger for storing dc current
or continuous supply for any electronics.
 It may be single output supply or multiple
output supply.

5. TYPES OF POWER SUPPLY
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1. AC POWER SUPPLY - Used directly
from the AC Source.
2. DC POWER SUPPLY - Used directly
from the DC Source like Battery.

6. OBJECTIVE
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 Take a basic idea about power supply circuits.
 Know about cellphone charger & it’s working
method.
 Learn about a laptop charger & it’s working
method.
 Learn about linear dc power supply and it’s
circuits.

7. 07
We use power supply system in everyday life. Actually
we converts the power from AC supply to DC supply
that means from higher AC voltage to lower DC voltage
as usual. TV, freeze, computer, micro-oven, washing
machine has power supply circuits. Different Types of
charger is nothing but a power supply circuit.
Power Supply Circuits

8. 08
Cell Phone Charger
Basically, it converts 220/110V
AC to 5V constant DC current.
As we know a transformer and a
rectifier can convert ac to dc but
here the ac current is not directly
pass through the transformer.
AC 220V is rectified to 311V DC
from RMS to p-p voltage by
multiplying root 2.

9. 09
Different parts of Cell Phone
charger circuit

10. 10
Double Transistor Model of
Charger Circuit

11. 11
Laptop Charger Circuit
MacBook charger circuit

12. 12
Different parts of the Charger
Circuit

13. 13
DC POWER SUPPLY
 The power supply from dc source or battery.
 Conversion of DC to DC
 Step down variable DC to DC circuit
 Mobile charger circuit from a solar cell battery

14. 14
Constant DC to DC Step Down
Converter
Fixed valued DC-DC converter
(5V, 6V,8V,9V,10V,12V,15V,18V,24V)

15. 15
Linear DC Power Supply
• Variable DC Power Supply that can vary the output
voltage.

16. 16
Solar Power Mobile Charger Circuit with 12V
Battery
 Input is direct connected to the solar panel of 12V

17. 17
Solar Power Mobile Charger
Circuit with 12V Battery
 Input is connected to the battery 12V

18. SUMMARY
Every power supply must obtain the energy it supplies to its
load, as well as any energy it consumes while performing
that task, from an energy source. Depending on its design, a
power supply may obtain energy from various types of
energy sources, including electrical energy transmission
systems, energy storage devices such as a batteries and fuel
cells, electromechanical systems such as generators and
alternators, solar power converters, or another power
supply.
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19. ACKNOWLEDGEMENT
“ We would like to thank
RETHWAN FAIZ,
Assistant Professor, Department of EEE / COE for
supporting our presentation & as well as this
Course. ”
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20. REFERENCES
[1] “What's the Difference Between Single Phase and Three Phase
AC Power Supplies?". Aegis Power Systems. Aegis Power Systems.
[2] http://www.patentstorm.us/patents/4937722-description.html
[3] Malmstadt, Enke and Crouch, Electronics and Instrumentation
for Scientists, The Benjamin/Cummings Publishing Company, Inc.,
1981, ISBN 0-8053-6917-1, Chapter 3.
[4] "Electric Vehicle Power Converters". Aegis Power Systems.
Aegis Power Systems.
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