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TITLE PAGE

DESIGN AND CONSTRUCTION OF A WIRELESS POWER TRANSFER THROUGH COIL

BY

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

DECEMBER,2018

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APPROVAL PAGE

This is to certify that the research work, "wireless power transfer through coil " by ---, Reg. No. EE/H2007/01430 submitted in partial fulfillment of the requirement award of a B.Sc on --- has been approved.

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

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

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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.

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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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As power requirements for portable devices increase, consumers are looking for easy-to-use charging solutions that can be deployed in a wide array of environments such as home, office, automobiles, airports, schools and more. Wireless charging uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station.  Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.

TABLE OF CONTENTS

 TITLE PAGE

APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
TABLE OF CONTENT

CHAPTER ONE

• INTRODUCTION
• BACKGROUND OF THE PROJECT
• PROBLEM STATEMENT
• AIM/OBJECTIVE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• LIMITATION OF THE PROJECT
• APPLICATION OF THE PROJECT
• SCOPE OF THE PROJECT
• METHODOLOGOLY
• PROJECT ORGANISATION

CHAPTER TWO

2.0     LITERATURE REVIEW
2.1     OVERVIEW OF THE STUDY
2.2     HISTORICAL BACKGROUND OF INDUCTION
2.3      REVIEW INDUCTIVE (MAGNETIC) COUPLING
2.4     GENERAL APPLICATION OF AN INDUCTIVE COUPLING
2.5     OVERVIEW OF AN INDUCTOR
2.6     INDUCTOR CONSTRUCTION REVIEW
2.7     INDUCTOR CONSTRUCTION REVIEW

CHAPTER THREE
3.0     CONSTRUCTION METHODOLOGY
3.1      SYSTEM BLOCK DIAGRAM
3.3      DESCRIPTION OF SYSTEM BLOCK DIAGRAM
3.4      SYSTEM CIRCUIT DIAGRAM
3.4.1  TRANSMITTING CIRCUIT
3.4.2  RECEIVING CIRCUIT
3.5      CIRCUIT OPERATION
3.6      CIRCUIT DESCRIPTION
3.6      DESCRIPTION OF ELECTRONICS COMPONENTS USED

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

•                                                       INTRODUCTION

1.1                                         BACKGROUND OF THE PROJECT
Inductive power transfer (also known as wireless power transfer) uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
This device use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer. Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling. Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.

1.2                                                  PROBLEM STATEMENT

The invention of this device brought solution to problem seen in the wired mobile charger and introduce the following advantages [K. Oguri, 2000].

• Protected connections – No corrosion when the electronics are all enclosed, away from water or oxygen in the atmosphere. Less risk of electrical faults such as short circuit due to insulation failure, especially where connections are made or broken frequently.
• Low infection risk – For embedded medical devices, transmission of power via a magnetic field passing through the skin avoids the infection risks associated with wires penetrating the skin.
• Durability – Without the need to constantly plug and unplug the device, there is significantly less wear and tear on the socket of the device and the attaching cable.
• Increased convenience and aesthetic quality – No need for cables

1.3                                             OBJECTIVE OF THE PROJECT
The objective of this project is to design a wireless power transmission system using inductive coupling is to charge a low power device using wireless power transmission. This is done using charging a resonant coil from AC and then transmitting subsequent power to the resistive load. The project is meant to charge a low power device quickly and efficiently by inductive coupling without the help of wires.

1.4                                           LIMITATION OF THE PROJECT

• Slower when using as charging device – Due to the lower efficiency, devices take longer to charge when supplied power is the same amount.
• More expensive – Inductive charging also requires drive electronics and coils in both device and charger, increasing the complexity and cost of manufacturing.
• Inconvenience - When a mobile device is connected to a cable, it can be freely moved around and operated while charging. In most implementations of inductive charging, the mobile device must be left on a pad to charge, and thus can't be moved around or easily operated while charging.
• Incompatibility - Unlike (for example) a MicroUSB charging connector, there are no universal standards for inductive charging, thus necessitating various different chargers for different devices. Newer approaches reduce transfer losses through the use of ultra thin coils, higher frequencies, and optimized drive electronics. This results in more efficient and compact chargers and receivers, facilitating their integration into mobile devices or batteries with minimal changes required. These technologies provide charging times comparable to wired approaches, and they are rapidly finding their way into mobile devices.
• Distance constraint: Field strengths have to be under safety levels
•  Initial cost is high
•  In RIC, tuning is difficult
• High frequency signals must be the supply Air ionization technique is not feasible

1.5                                         APPLICATIONS OF THE PROJECT

• Near-field energy transfer
• Electric automobile charging Static and moving
• Consumer electronics
• Industrial purposes  Harsh environment Far-field energy transfer
• Solar Power Satellites
• Energy to remote areas
• Can broadcast energy

1.6                                                 SCOPE OF THE PROJECT
Wireless charger using inductor (coil), is one of the effective ways to transfer power between points without the use of conventional wire system. Wireless power transmission is effective in areas where wire system is unreachable or impossible. The power is transferred using inductive coupling, resonant induction or electromagnetic wave transmission depending on whether its short range, mid-range or high range.
In this project, the wireless power transfer works mainly on the principle of inductive coupling, using inductor at the transmitting and receiving side of the circuits. With this inductive coupling idea, we are trying to transfer power wirelessly to charge low power devices, such as mobile phones, cameras, wireless mouse etc.

1.7                                         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.
• Draw a block diagram.
• Test for continuity of components and devices,
• Design was carried out.
• Studying of various component used in circuit.
• Construct the circuit.
• Finally, the whole device was cased and final test was carried out.

1.8                          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 this study. In this chapter, the background, significance, objective, limitation, application and scope of this study were discussed.
Chapter two is on literature review of this study. 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.

CHAPTER TWO: The complete chapter two of “wireless power transfer through coil ” is available. Order full work to download. Chapter two of “wireless power transfer through coil ” consists of the literature review. In this chapter all the related work on “wireless power transfer through coil "

CHAPTER THREE: The complete chapter three of “wireless power transfer through coil ” is available. Order full work to download. Chapter three of “wireless power transfer through coil ” 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 "wireless power transfer through coil ” is available. Order full work to download. Chapter four of “wireless power transfer through coil ” 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 “wireless power transfer through coil ” is available. Order full work to download. Chapter five of “wireless power transfer through coil ” consist of conclusion, recommendation and references.

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