Design And Construction Of A 3KVA Uninterruptible Power Supply Using SG3524N
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The purpose of this project is to design and construct an uninterruptible power supply. Uninterruptible power supply is a voltage regulatory and uninterruptible power device planned to electromechanically sustain a constant voltage level and supply an uninterruptible power to devices.
This device receive minimum voltage of 120vac and maximum of 260vac and filter the current and voltage thereby brings out suitable voltage output to be used by the devices in it, then when there an unexpected power outage from the utility mains or generator the system will automatically switch over to the inverter source thereby providing additional power to the appliances in use without interruption.
This device stabilizes an AC input voltage of 120-260V to give an AC output voltage of 240V, provide a rechargeable backup power supply the system and also provide low battery indication automatically. The automatic feature can be achieved by the electronics devices used such SG3524N IC, electro-magnetic device (relay), auto- transformer and other electronics devices.
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
1.2 PURPOSE OF THE PROJECT
1.3 OBJECTIVE OF THE PROJECT
1.4 SIGNIFICANCE OF THE PROJECT
1.5 SCOPE OF THE PROJECT
1.6 LIMITATION OF THE PROJECT
1.7 DEFINITION OF THE PROJECT
1.8 METHODOLOGY
1.9 PROJECT ORGANISATION
CHAPTER TWO
LITERATURE REVIEW
2.1 DESCRITION OF UNTERUPTIBLE POWER SUPPLY
2.2 HISTORICAL BACKGROUND OF UPS
2.3 THE POWER SUPPLY
2.4 THEORY OF TRANSFORMER
2.5 OPERATION OF THE TRANSFORMER
2.6 VOLTAGE TRANSFORMER RATION (K)
2.7 TRANSFORMER LOSSES
CHAPTER THREE
METHODOLOGY
3.1 SYSTEM BLOCK DIAGRAM
3.2 SYSTEM CIRCUIT DIAGRAM
3.3 SYSTEM OPERATION
3.3.1. The oscillator stage
3.3.2. Power drive stage for pwm ups circuit with charger
3.3.3. Battery charging section
3.4 DESCRIPTION OF COMPONENTS USED
CHAPTER FOUR
4.0 TEST AND RESULT ANALYSIS
4.1 CONSTRUCTION PROCEDURE AND TESTING
4.2 CASING AND PACKAGING
4.3 ASSEMBLING OF SECTIONS
4.4 TESTING OF SYSTEM OPERATION
4.5 COST ANALYSIS
4.6 PROBLEM ENCOUNTERED
4.7 PRECAUSION
CHAPTER FIVE
5.1 CONCLUSION
5.2 RECOMMENDATION
5.3 REFERENCES
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