Design and Construction of a D.C. to A.C. Inverter System

Design and Construction of a D.C. to A.C. Inverter System

ABSTRACT

This project is titled the design and construction of a D.C. to A.C. inverter system. It is designed to meet up with the power demand in the offices and homes in the absence of power supply from the national supply authority, NEPA. In order words, the device/item serves as a substitute for NEPA which almost monopolises the power supply to people.

It is designed in such a way that it will take up 12v D.C. from the battery and inverts it to an output of 220v, 50H2 A.C. It makes no noise during operation and no hazardous carbon monoxide is generated in the surrounding.

This is a feature that makes it safe to use any were when compared to the generator. Also, the circuit is capable of charging the battery (i.e 12v source) when the power from the supply authority is on. This greatly reduces the cost of operation of the system.

Title Page
Approval Page
Dedication
Acknowledgement
Abstract

Table of Content

Chapter One
1.0 Introduction
1.1 Block Diagram Of The Inverter System
1.2 Inverter System
1.3 Circuit Diagram Of The System

Chapter Two
2.0 Major Component’s Description
2.1 Resistors
2.2 Diodes
2.3 Capacitors
2.4 Transformers
2.5 Transistor
2.6 Integrated Circuit

Chapter Three
3.0 Sectional Description Of The System
3.1 Oscillator Section
3.2 Switching Section
3.3 Power Transformer And Inverter Actions

Chapter Four
4.0 Construction Procedure And Testing
4.1 Casing And Packaging
4.2 Assembling Of Sections
4.3 Testing Of System Operation

Chapter Five
5.0 Installation Of The Completed System
5.1 Problem Encountered
5.2 Cost Analysis

Chapter Six
6.0 Conclusion
6.1 Recommendation
Bibliography

CHAPTER ONE

1.0 INTRODUCTION

The idea behind the design and construction of this system is to make available or alternative means of power supply for household or industrial purposes. This goes a long way in helping to curb the problem frequently encountered as a result of power failure. That notwithstanding it makes it possible to have other means of providing power to our doorstep rather than solely depending on the power from the national grid.

Moreover, the rate of power failure in this entry is high. So there is every need that other means of power supply should be made available for the constant running of our electronic equipment and gadgets and also to provide comfort to man. Hence, with the help of a D.C. to A.C. inverter system, which has come to solve the problem of frequent power failure of Nigeria, a steady running and operation of our electronic equipment and gadgets are guaranteed.

1.2 INVERTER SYSTEM

The inverter system was built to convert a D.C. voltage to an A.C. voltage with the help of an oscillator

This inverter system also consists of two stages of switching circuits which comprises of power transistors connected in the common drain configuration.

Since the oscillator has two outputs. Each of the switching circuits is coupled to the two outputs of the oscillator respectively. This is well explained in detail in chapter three below.

When the oscillator is powered from the 12v D.C. battery, the oscillator of the system generates 60 which is then used to open the gate of the transistors which has a specific power and current ratings.

The combined output power and current of the transistors will then be applied to the transformer which then steps up the voltage to an output level of 220v A.C.