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DESIGN AND CONSTRUCTION OF A 500VA POWER INVERTER

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TITLE PAGE

 

BY

---
--/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---



APPROVAL PAGE

This is to certify that the research work, "design and construction of a 500va power inverter" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.

By
---                                                     . ---
Supervisor                                                  Head of Department.
Signature……………….                           Signature……………….        

……………………………….
---
External Invigilator



DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.



ACKNOWLEDGEMENT

The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.


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ABSTRACT

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 230v, 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 anywhere 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 designing a modified sine wave inverter of power rating of 500va that can be used to power appliances both in homes and industries.

TABLE OF CONTENTS
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWLEDGEMENT
ABSTRACT
TABLE OF CONTENT
CHAPTER ONE
1.0      INTRODUCTION
1.1      BACKGROUND OF THE PROJECT
1.2      PROBLEM STATEMENT
1.3      OBJECTIVE OF THE PROJECT
1.4      SIGNIFICANCE OF THE PROJECT
1.5    APPLICATION OF THE PROJECT
1.6      SCOPE OF THE PROJECT
1.7      LIMITATION OF THE PROJECT
1.8      PURPOSE OF THE PROJECT
1.9      PROJECT ORGANISATION
CHAPTER TWO
2.0     LITERATURE REVIEW
2.1      REVIEW OF HISTORY OF AN INVERTER
2.2   REVIEW OF HOW TO CHOOSING THE RIGHT INVERTER
2.3      REVIEW OF THE DIFFERENCE BETWEEN SINE WAVE AND MODIFIED SINE WAVE   INVERTER.
2.4      REVIEW OF INVERTER CAPACITY
2.5      SAFETY OF INVERTER
2.6      INVERTER RATING
2.7      WHY CHOOSE A MODIFIED SINE WAVE INVERTER?
2.8      TYPES OF INVERTER

CHAPTER THREE
3.0     CONSTRUCTION
3.1      BASIC DESIGNS OF AN INVERTER
3.2      BLOCK DIAGRAM OF THE SYSTEM
3.3      SYSTEM OPERATION
3.4      CIRCUIT DIAGRAM
3.5      CIRCUIT DESCRIPTION
3.6     DESCRIPTION OF COMPONENTS USED
3.7      HOW TO CHOOSE A RIGHT INVERTER AND BATTERY
3.8      HOW TO CHOOSE THE BEST INVERTER BATTERY
CHAPTER FOUR
RESULT ANALYSIS
4.0      CONSTRUCTION PROCEDURE AND TESTING
4.1      CASING AND PACKAGING
4.2      ASSEMBLING OF SECTIONS
4.3      TESTING OF SYSTEM OPERATION
4.4      COST ANALYSIS    
CHAPTER FIVE     
5.0      CONCLUSION
5.1      RECOMMENDATION
5.2      REFERENCES

 

CHAPTER ONE
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 [2].
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 [2].
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 [1].
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 [1][2].
Finally, the success of this study will be beneficial to the society at large. Mass production of inverters will lead to improve standard of living of the populace and the nation will move forward in pursuit of technological development [2].

1.2                                               PROBLEM STATEMENT
As a result of continuous power failure and fluctuation in power supply by Power Holding Company of Nigeria (PHCN), sensitive appliances and system are affected by interruption power supply. Then, this project is to provide a back-up and reliable power supply to power some selected home appliances such as computers, television set, lighting systems.

1.3                          AIM / OBJECTIVE OF THE PROJECT
The aim of this project is to design and construct a circuit that will take a 12v dc input from battery and provide a 220v ac and 500w output that will be able to supply a electricity to a home. At the end of this work the student involved shall able:-

  • To design a circuit that will convert dc to ac power for various appliances used in domestic home.
  • To provide a noiseless source of electricity generation.
  • To have a source of generating electricity that has no negative effect on the environment (i.e. no greenhouse effect).
  • To provide a source of electricity power with low maintenance cost and zero fuel cost.

1.4                                           PURPOSE OF THE PROJECT
The purpose of this work is to provide a means of having a backup power supply by building an electronic device or circuitry that changes direct current (DC) to alternating current (AC).

1.5                                 PROJECT MOTIVATION
Inverters are the best when it comes to back-up since they can come up very fast and they generate little or no noise unlike generator. Even in an area with constant power supply, power outage due to natural cause and faults are usually unannounced. It is therefore very important to prevent causalities and loss of goodwill by having a reliable back-up power installed.

1.6                                       SIGNIFICANCE OF THE PROJECT
In the recent years,  power  inverter has become a major power source due to its environmental and economic benefits and proven reliability.
Power inverter is produced by connecting the device on the 12VDC battery as the input to produce 220VAC as the required output. It can also be connected to solar panel [1].
Second, the whole energy conversion process is environmentally friendly. It produces no noise, harmful emissions or polluting gases. The burning of natural resources for energy can create smoke, cause acid rain and pollute water and air. Carbon dioxide, CO2, a leading greenhouse gas, is also produced in the case of burning fuels. Power inverter uses only the power of the battery as its fuel. It creates no harmful by-product and contributes actively to the reduction of global warming [1][2].

1.7                                              SCOPE OF THE PROJECT
A power inverter is a power conversion device. It converts fixed direct current (DC) voltage to frequency sinusoidal alternating current (AC) voltage output.
Power inverters are used to power and control the speed, torque, acceleration, deceleration, and direction of the motor. The use of inverter has become prevalent in wide range of industrial applications; from motion control applications to ventilation systems, waste water processing facilities to machining areas, and many others. Though power inverters offer lower operating costs and higher efficiency, they are not without their problems [3].
The waveform of this work is modified sine wave. The modified sine wave output of such an inverter is the sum of two square waves one of which is phase shifted 90 degrees relative to the other. The result is three level waveform with equal intervals of zero volts; peak positive volts; zero volts; peak negative volts and then zero volts. This sequence is repeated. The resultant wave very roughly resembles the shape of a sine wave [4].

1.8                                         LIMITATION OF THE PROJECT

  • Expensive when compared to traditional generators
  • The inverter can power a few appliances for a short period
  • The input is limited to 12VDC, output to 230VAC and the frequency to 50Hz

1.9                                       APPLICATION OF THE PROJECT
The applications and uses of a power inverter are as follows [5, 6]:

  • DC power source utilization
  • Uninterruptible power supplies
  • Induction heating
  • HVDC power transmission
  • Variable-frequency drives
  • Electric vehicle drives
  • Air conditioning
  • Electroshock weapons

1.10                                     METHODOLOGY
To achieve the aim and objectives of this work, the following are the steps involved.
Study of the previous work on the project so as to improve it efficiency. The block diagram and the working principle of the project was studied, followed by drafting out a schematic diagram and arrangement the entire materials / components on the vero board, testing the completed system to see if the design works and finally, implementation of design of the project.

1.11                                      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.

The components used were all soldered into the board after which it was correctly confirmed done as shown below:
Description: C:\Users\hyclass\Documents\inverter one.jpg  
4.1                                          CASING AND PACKAGING
All the components were soldered onto the Vero Board. Then after that, a case was gotten where the entire circuit was mounted follow by other external components such as indicators, battery contacts and switch as shown below:
Description: C:\Users\hyclass\Documents\inverter 3.jpg


CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and construction of a 500va power inverter" is also available. Order full work to download. Chapter two of "design and construction of a 500va power inverter"consists of the literature review. In this chapter all the related work on "design and construction of a 500va power inverter" was reviewed.

CHAPTER THREE: The complete chapter three of "design and construction of a 500va power inverter" is available. Order full work to download. Chapter three of "design and construction of a 500va power inverter" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.

CHAPTER FOUR: The complete chapter four of "design and construction of a 500va power inverter" is available. Order full work to download. Chapter four of "design and construction of a 500va power inverter" consists of all the test conducted during the work and the result gotten after the whole work

CHAPTER FIVE: The complete chapter five of "design and construction of a 500va power inverter" is available. Order full work to download. Chapter five of "design and construction of a 500va power inverter" consist of conclusion, recommendation and references.

 

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