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APPROVAL PAGE

This is to certify that the research work, "design and construction of a wireless mobile charger using inductive coupling" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.

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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.
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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. The aim of this work is to design a device that can charge cellphone wirelessly.

TABLE OF CONTENTS

TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
TABLE OF CONTENT

CHAPTER ONE

• INTRODUCTION
• OBJECTIVE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• APPLICATIONS OF THE PROJECT
• SCOPE OF THE PROJECT
• PROJECT ORGANISATION

CHAPTER TWO

2.0      LITERATURE REVIEW
2.1      HISTORICAL BACKGROUND OF INDUCTION

2.2        APPLICATION OF AN INDUCTIVE COUPLING
2.3      DESCRITION OF INDUCTOR
2.4      INDUCTOR CONSTRUCTION REVIEW
2.5      TYPES OF INDUCTOR

CHAPTER THREE
3.0       DESIGN METHODOLOGY
3.1      SYSTEM BLOCK DIAGRAM
3.2     SYSTEM OPERATION 
3.3     SYSTEM WORKING PRINCIPLE
3.4    SYSTEM CIRCUIT DIAGRAM
3.5    ELECTRONIC COMPONENTS

CHAPTER FOUR

4.0     RESULT ANALYSIS
4.1      CONSTRUCTION PROCEDURE AND TESTING ANALYSIS
4.2     CASING AND PACKAGING
4.3        ASSEMBLING OF SECTIONS
4.4    TESTING OF SYSTEM OPERATION
4.5      PROBLEM ENCOUNTERED

CHAPTER FIVE

5.1      CONCLUSIONS                   
5.2     RECOMMENDATION
5.3      REFERENCES

 

 

CHAPTER ONE

• INTRODUCTION

The method use in charging portable devices such as cellphone wirelessly is known as inductive charging. Inductive 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.
Induction chargers 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.

1.1                                             OBJECTIVE OF THE PROJECT
The objective of this project is to design a wireless power transmission mobile charger circuit 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.

1.2                                         SIGNIFICANCE OF THE PROJECT

• 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                                           LIMITATION OF THE PROJECT

• Slower charging – 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

1.4                                         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

1.5                                                 SCOPE OF THE PROJECT
Wireless charger using inductive coupling, 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 charger works mainly on the principle of inductive coupling. 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.

1.6                                        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 the study. In this chapter, the background, significance, objective limitation and problem of the 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.

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CHAPTER THREE: The complete chapter three of "design and construction of a wireless mobile charger using inductive coupling" is available. Order full work to download. Chapter three of "design and construction of a wireless mobile charger using inductive coupling" 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 wireless mobile charger using inductive coupling" is available. Order full work to download. Chapter four of "design and construction of a wireless mobile charger using inductive coupling" 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 mobile charger using inductive coupling" is available. Order full work to download. Chapter five of "design and construction of a wireless mobile charger using inductive coupling" consist of conclusion, recommendation and references.

 

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