Design And Construction Of Uninterruptible Power Supply

The uninterrupted power supply (UPS) is design to help in the offices, workshops and house hold appliances, due to the unstable power supply being supplied by (NEPA) presently known as Power Holding Company of Nigeria (PHCN) usually supply to us.

With the help of the UPS we don't need to depend much on PHCN it is stress free because it don't need someone to change it over when light goes off, once there is any power failure it will automatically switched on and when power comes it will switch off and start charging the battery.

Another interesting thing in the UPS is that it does not need any external charger for charging the battery when it goes low, it have already built charger inside the UPS when there is light it will be charging the battery. 

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

TABLE OF CONTENTS

INTRODUCTION

INVERTER SECTION/OSCILLATION

AUTOMATIC CONTROL SECTION

AIM OF THE DESIGN

DEFINITION OF TERMS/COMPONENTS DESCRIPTION

RESISTORS

CAPACITORS

TRANSISTORS

FIELD EFFECT TRANSISTORS

RELAYS

DIODE

TRANSFORMER

SECTIONAL DESCRIPTION FOR THE SYSTEM

OSCILLATION CIRCUIT SECTION

CIRCUIT OPERATION

WAVEFORM OF AN OSCILLATION

WAVEFORM OF AN INVERTER

SWITCHING CIRCUIT SECTION

POWER TRANSFORMER AND INVERTER ACTION

PRECAUTION DURING WINDING OF TRANSFORMER

AUTOMATIC CIRCUIT SECTION/CHARGER

COMPLETE CIRCUIT DIAGRAM OF THE UPS

CONSTRUCTION PROCEDURE AND TESTING

CASING AND PACKAGING

ASSEMBLING OF SECTIONS

TESTING OF SYSTEM OPERATION

PROBLEMS ENCOUNTERED, CONCLUSION AND RECOMMENDATION

PROBLEMS ENCOUNTERED

RECOMMENDATION

COST ANALYSIS

REFERENCES