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


Original price was: ₦ 3,000.00.Current price is: ₦ 2,999.00.


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

It is designed in such a way that it will take up 12v DC from battery and inverts it to an output of 220v, 50Hz AC. 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 where when compared to 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.

This work is aimed at building a 12v ferrite based inverter of power rating of 3kva that can be used to power appliances both in homes and industries.


Title page                                                                                                      i

Certification                                                                                     ii

Dedication                                                                                        iii

Acknowledgement                                                                                    iv

Table of Contents                                                                           vii

Abstract                                                                                                        x


1.0 Introduction

1.1 Background of the project

1.2 Problem statement

1.3 Aim and Objectives of the project

1.4 Significance of the Project

1.5 Limitation of the project

1.6 Methodology

1.7 Block diagram of the project

1.8 Report Layout



2.1 Historical Background of the project

2.2 Theory Behind the project topic

2.3 Existing types of the project

2.4 The Innovations in this project

2.5 Summary of the Review



3.1 Project Materials Documentation

3.2 Significance of Materials Documentation

3.3 Common Mistakes in Documentation of materials

3.4 Documentation of methods



4.1 Engineering Design Procedure

4.2 Importance of Documenting Design Procedure

4.3 Documentation of Construction Process

4.4 Bill of Engineering Measurement and Evaluation (BEME)

4.5 A Sample Design and Construction Documentation



5.1 Project Testing

5.2 Result Presentation and Discussion

5.3 A Sample Test Results and Discussion



6.1 Conclusion

6.2 Recommendation

6.3 A sample Conclusion and Recommendation




1.0                                                        INTRODUCTION

1.1                                           BACKGROUND OF THE STUDY

Electricity supply is one the economic infrastructural facilities that are indispensable to a nation’s economic development. The efficiency of the supply of electricity will not only influence returns on investment on existing enterprises, it also plays a major role in the creation of an economic environment which influences decisions on potential investment [Barnes, 2012].

The electricity which is the main source of power for our domestic consumption, industrial development, learning centres and medical centre should really be rehabilitated into enhancement of productivity [Barnes, 2012].

However power failure has resulted in people buying generators for their own daily activity. Other businesses are also not functioning due to absence of constant power supply. These are the reasons that necessitate the designing and construction of inverter and other standby system that can deliver maximum output power to the load. As society grows from simple to complex, mankind began to spread all over the earth and so it becomes necessary  to enjoy power using inverter [Barnes, 2012].

Statistics have shown that the number of business that have been closed simply because of power problem and cannot be over emphasized, so mankind need inverter seriously in other to restore technology development, businesses, communications, learning centre and medical centres. However, the background of the study lies within the reason why and the construction of inverter should be forwarded and factor that enhance inverter marketability [Du, Ruoyang, 2017].

Inverters are classified either as Iron core inverters or ferrite core (chopper) inverter. This work is focusing of the ferrite based inverter of 12v input and 220vac output.

Ferrite core inverter is a type of power inverter used for power backup, it uses ferrite core transformer to step-up the low voltage AC to high voltage AC at high frequencies derived from a DC source (battery).

Ferrite core transformer inverters are lite weight, high efficiency, low cost and have good portability than traditional bulky iron core transformer based inverter.

Ferrite core based inverter is often marketed as transformerless inverter because of their lite weight it feels like it doesn’t sport a transformer.

The ferrite core transformer can handle a lot of power in a much smaller dimension than iron core transformer because ferrite material has low energy loss at high frequencies.

Ferrite cores has high magnetic permeability, meaning it can hold lot of magnetic field around it, so less magnetic flux loss and because ferrite materials are bad conductor of electricity, at high frequencies very low eddy current is induced on the core.

1.2                                                  PROBLEM STATEMENT

Iron core inverter was first invented which was later discovered that it has some limitations such as low efficiency, big in size, high in weight, high cost and it greatly produce heat when on load. It was because of these problems discovered in iron core inverter that led to the discovery of ferrite based inverter which overcomes these challenges. Ferrite inverter has high efficiency, small in size, low in weight, low cost and heat generation is also less.

1.3                                    AIM AND OBJECTIVES OF THE STUDY

The main aim of this work is to build a high frequency ferrite core transformer based inverter circuit which can output 3000 watt 220VAC at 50Hz with good efficiency. The objectives are:

  1. To build this devices with available components
  2. To learn how a ferrite core inverter functions stage by stage extensively.
  • To achieve good efficiency in the inverter.

1.4                                                PURPOSE OF THE STUDY

The main purpose of this work is to achieve high portability and high efficiency in an inverter.

1.5                                                        LIMITATION OF THE STUDY

As we all know that no human effort to achieve a set of goals goes without difficulties, certain constraints were encountered in the course of carrying out this project and they are as follows:-

  1. Difficulty in information collection: I found it too difficult in laying hands of useful information regarding this work and this course me to visit different libraries and internet for solution.
  2. Difficulty in parts gathering: I found it too difficult when gathering electronics parts used for the prototype.

1.6                                                      SIGNIFICANCE OF THE STUDY

This research work will throw more light on the best techniques for building inverter for any purpose. This study will also be designed to be of immense benefit to all the builders of inverter.

It will also serve as a guide to whoever that wants to purchase inverter with good efficiency.

Finally, it will also serve as a useful piece of information for both producers and users of inverter.

1.7                                            SYSTEM BLOCK DIAGRAM

Before carrying out any project, the block diagram must be drawn and fully understood. Block diagram gives a pictorial understanding of any work. The block diagram of ferrite core inverter is as shown in figure 1 below:

Fig.1 Block diagram of ferrite core inverter:

1.9                                        PROJECT WORK ORGANISATION

The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:

Chapter one of this work is on the introduction to a power inverter. In this chapter, the background, significance, aim/objective problem statement, purpose, application, limitation and problem of a power inverter were discussed.

Chapter two is on literature review of a power inverter. In this chapter, all the literature pertaining to this work was reviewed.

Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.

Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.

Chapter five is on conclusion, recommendation and references.


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