DESIGN AND CONSTRUCTION ON AN INVERTER

DESIGN AND CONSTRUCTION ON AN INVERTER

DESIGN AND CONSTRUCTION ON AN INVERTER

CHAPTER ONE

INTRODUCTION

1.1   BACKGROUND OF THE STUDY

In this modern society, electricity has great control over the most daily activities for instance in domestic and industrial utilization of electric power for operations. Electricity can be generated from public supply to consumers in different ways including the use of water, wind or steam energy to drive the turbine as well as more recently the use of gas. Generators, solar energy and nuclear energy are also source of electricity. (Adeyanju, 2003).

In Nigeria, there is inconsistence supply of electricity by the power supplying company to the consumers. Hence the use of additional electric power source such as electric power generators and most recently the use of semiconductor power devices such as the Bipolar Transistor, Thyristors and particularly MOSFET to generate electric power in conjunction with a DC battery in few kilowatts. An Inverter offers a better additional power source to Generators as well as UPS considering its long duration, cost effectiveness and maintainability.

Major use of electricity today arises in device using electrical current at either low or zero frequency. The disturbance may come up as a result of short circuit leading to transient and sudden isolation in the commercial power supply. The Inverter is the best solution to power conditioning on critical load such as air route traffic, real time data processing computer, industrial control processing system etc., because of their sensitivity to the nature of the power supply for operations. Protection of this kind of equipment is very necessary. (Ronald and Neal, 1998).

Looking at our country today we are plagued with constant power failure and even lack of power to some rural and urban center, hence there is a need to have a system which convert a readily available direct current(DC) to an alternating current(AC) with higher efficiency and low maintenance cost like the Inverter.

1.2   STATEMENT OF THE PROBLEM

I was moved by the need to generate an electrical power through a noiseless, portable and inexpensive source that has no negative effect on the environment. I also look up the challenge to carry-out this project because of my quest to no more about power generation.

1.3   AIMS AND OBJECTIVE

The purpose of the project is to design and construct a circuit that will take care of a 220v, 3.5KVA Inverter.

         The specific objectives of this study are as follows

  • To have a source of generating that has no negative effect on the environment (i.e. no greenhouse effect).
  • To understand basically the various component require assembling a 220v, 3.5KVA Inverter.
  • To understand the working principle of the 220v, 3.5KVA Inverter.
  • To produce a 220v, 3.5KVA (INVERTER) for large business environment

1.4   SCOPE OF THE PROJECT

The scope of this project is to design and construct an Inverter with an output power rating of 3.5KVA, maximum output current rating of 20.83A, output of 220vac from a 24dc input.

1.5   SIGNIFICANCE OF THE STUDY

The significance of the design and construction of inverter cannot be over emphasized in the sense that it is financially viable particularly in areas where the cost of providing a main supply is prohibitive.

The design and construction of 220v, 3.5kva Inverter is justified by the fact that it converts 24vdc battery to a 220vac, 3.5kva output which can be used to power an essential circuit such as computers, surgical equipment, security door etc.

1.6   LIMITATION OF THE STUDY

The work has been limited by lack of funds to make the researcher to search for the necessary information for this work, despite the above limitations, the researcher has been able to work efficiency by using the primary data (interview and questionnaire)

Due to financial problem and time factor within this researches, this work will be limited to the construction of 220v, 3.5kva inverter.

Anther limitation is the used of bulky transformer instead of copper transformer which is lighter and smaller in size but more expensive.

1.7   DEFINITION OF TERM

This area shall look on the related and important definition in this project:  

  • INVERTER: Ann inverter is a device which changes the direct current (DC) into an alternating current (AC) power.
  • TRANSFORMER: A transformer is a static (stationary) electromagnetic energy converter device which transforms electric power from one point to another with the same frequency.
  •  CAPACITOR: A capacitor a device for storing electrical charges. It consists of two conductors which are parallel to each other. 
  • TRANSISTOR: A transistor a semiconductor device use to amplify and switch electronics signal.
  • RELAY: A relay is an electrical device that open and close a circuit electronically or electromagnetically.

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