ABSTRACT
Automatic voltage inverter is an important area in power system engineering. It is the process of using a 12v DC from the battery to achieve a 220/230V AC through the help of oscillator, drivers, power transistors and transformer. The stages are battery to oscillators, oscillators to drivers, drivers to power transistors then from power transistors to transformer which is capable of giving out 220/230V (1000w) as an output. A 1.25KVA (1000w) voltage inverter was constructed, tested and certified okay. Since the inverter as constructed to step-up voltage, the power transformer is used as step-down for charging and as step up transformer for inverting. This project helps in the improvement of the epileptic power supply we are having in Nigeria and it also reduce the high level of power dependence in Nigeria by serving as IPP’s (Independent Power Plants). The project as run in school helps in equipping the students in the practical aspect of the course.
TABLE OF CONTENTS
Title page i
Certification page ii
Dedication iii
Acknowledgement iv
Abstract v
Table of content vi
CHAPTER ONE
Introduction
Analysis (review of existing system)
Aims and objective
Scope/Limit of the project
Application
CHAPTER TWO
Literature review
Introduction
Brief review of used components
Capacitor
Resistor
Relay
Transistors
Diodes
Switches
Operational amplifier
Transformer
A.C. Voltage meter
Oscillator
MOSEFET
CHAPTER THREE
Design and analysis
Introduction
Methodology
D.C. Supply (input voltage)
Voltage regulator
Control logical circuit
Frequency generator
Phase splitter
Driver
Step-up transformer
A.C. supply (output voltage)
Methodology II
The unregulated supply (input voltage)
Isolating relay
Step-up transformer/rectifier circuit
Changing control/logic comparator circuit
Theory and calculation
Circuit diagram casing design
CHAPTER FOUR
Constructions test and result
Introduction
Problem encountered
CHAPTER FIVE
Conclusion and recommendations
Conclusion
Recommendations
References
