Types of Power Supply - Assignment

5/5/2021
POWER SUPPLY
SUBMITION DATE: MAY 6,2021
SUBMISSION TO: MR SOLOMON DAMENA
GROUP MEMBERS ID
1. ANDUAMLAK ALEHEGNE ...........................InTeR/0014/11
2. BEREKET ANBEISE ....................................InTeR/0029/10
3. DINKISA TAYE........................................................InTeR/0021/11
4. MESFIN MARIYO.....................................................InTeR/0046/11
5. NATNAEL HAILE.....................................................InTeR/0049/11
6. ABEL TEFERI...........................................................InTeR/0004/11
HAWASSA UNIVERSITY
Department of information technology
Computer maintenance and technical support
Assignment

Table of Contents
Power Supply ................................................................................................................................................ 2
Parts inside a power supply are: ................................................................................................................ 2
Power Supply Block Diagram .................................................................................................................. 3
Types of power supply ................................................................................................................................ 3
SMPS- Switched Mode Power Supply ..................................................................................................... 3
Uninterruptible Power Supply .................................................................................................................. 4
AC Power Supply ..................................................................................................................................... 4
DC Power Supply ..................................................................................................................................... 5
Regulated Power Supply ........................................................................................................................... 5
Programmable Power Supply.................................................................................................................... 6
Computer Power Supply ........................................................................................................................... 6
Linear Power Supply ................................................................................................................................. 7
Batteries ....................................................................................................................................................... 7
Types of Batteries .................................................................................................................................... 8
1) Primary Batteries: ................................................................................................................................. 8
2) Secondary Batteries: ............................................................................................................................. 8
Common problems and solution of power supply .................................................................................... 9
References .................................................................................................................................................. 10

Power Supply
Power supplies are the essential components of every system to get electrical energy for the
operation.
A power supply is an electrical device that supplies electric power to an electrical load. The
primary function of a power supply is to convert electric current from a source to the correct
voltage, current, and frequency to power the load. Sometimes, these power supplies name to as
electric power converters. Some type of power supplies are separate pieces of loads, whereas
others are fabricated into the appliances that they control.
Examples of the latter include power supplies found in desktop computers and consumer
electronics devices.
Power supplies can perform include limiting the current drawn by the load to safe levels.
Shutting off the current in the event of an electrical fault, power conditioning to prevent
electronic noise or voltage surges on the input from reaching the load, power-factor correction,
and storing energy so it can continue to power the load in the event of a temporary interruption in
the source power.
All power supplies have a power input connection, which receive energy in the form of electric
current from a source, and one or more power output connection that deliver current to the load.
The source power may come from the electric power grid, such as an electrical outlet, energy
storage devices such as batteries or fuel cells, generators or alternators, solar power convertors,
or another power supply.
Parts inside a power supply are:
 Transformer - The input transformer is used to convert the incoming line voltage down
to the required level of the power supply.
 Rectifier - that converts alternating current (AC) into direct current (DC).
 Filter - that smooths out the DC (direct current) coming from a rectifier. It will remove
the unwanted ripples in the pulsated DC.
 Voltage Regulator - A voltage regulator that controls the DC output, allowing the
correct amount of power, volts or watts, to be supplied to the computer hardware.

Power Supply Block Diagram
The power supply block diagram, and the systematic conversion of 230V AC to 12V DC is
discussed below.
 A step-down transformer converts the 230V AC into12v.
 The bridge rectifier is used to change AC to DC
 A capacitor is used to filter the AC ripples and gives to the voltage regulator.
 Finally, voltage regulator regulates the voltage to 5V and finally, a blocking diode is used
for taking the pulsating waveform.
Power Supply Block Diagram
Types of power supply
SMPS- Switched Mode Power Supply
An SMPS power supply is one type of power supply that includes a switching regulator for
converting electrical-power powerfully. This power supply transmits the power from a DC
source or AC source to DC loads, such as a PC (personal computer), while changing the
characteristics of current and voltage.
SMPS – Switched Mode Power Supply