A Mini Project Presentation On

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ADVANCED WIRELESS MOBILE CHARGER

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By

NAME: TATHAGAT SHIRSALE

PRN: 1930331372083

NAME: MAHADEO LOKHANDE

PRN: 2030331372016

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Under the guidance of

MR. ANIKET JANGAM

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Department of Electronics & Telecommunication Engineering.

Dr. Babasaheb Ambedkar Technological University, Lonere.

ADVANCED WIRELESS MOBILE CHARGER

Contents

• Introduction
• Requirement
• Working
• Benefits
• Conclusion�

Introduction

• Wireless charging technology enables wireless power transfer from a power source such as charger to a load such as a mobile device conveniently across an air gap by eliminating the bunch of wire.
• Wireless power transmission involves the exchange of power without the need for physical connections. The development of this technology started in the late 19th and early 20th centuries, when a number of important innovations in electromagnetic research were made.
• These advancements established the basic principles that served as the foundation for modern electrical power transport.
• During the past 20 years, improvements in wireless technologies have led to a revival of related research. Public interest in wireless power has also increased with the application of Nikola Tesla ideas and inventions .
• As a result of this, the feasibility of technological implementation merits examination.

Requirement

Hardware Components

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1. Wireless Power Charging Coils
2. Light Emitting Diode(LED)
3. Resistor
4. Battery Cap
5. IRFZ44N MOSFET
6. Switch
7. 9V Battery

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8. Diodes
9. USB Cable
10. Transmitter Cable
11. Receiver Coil
12. 1000UF Capacitor25 V
13. 5V Regulator
14. Zero PCB

Requirement

Hardware Components

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1. Wireless Charging Coils

Wurth Electronics Qi Wireless Power Charging Coils (WE-WPCC) allow power to be transferred wirelessly through inductive coupling. These charging coils and receivers go beyond the Qi standard of 20W with many of the coils capable of handling up to 200W. 

2) Light Emitting Diode(LED)

LED is a semiconductor light source that emits light when current flows through it. When a current flows through the diode, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.

Requirement

Hardware Components

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3. Resistor

It is an electrical device may be a passive two-terminal electrical part that implements resistance as a circuit component. In electronic circuits, resistors unit of measurement accustomed reduce current flow, alter signal levels, to divide voltages, bias active components, and terminate transmission lines, among completely different uses.

4. Battery Cap

A battery assembled cap, a cylindrical battery with the cap and a method for making the same. The vent cap is attached to the battery cover by a hinge connection which allows for play between the vent cap and the battery cover and which allows for rotation of the vent cap.

Requirement

Hardware Components

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5. IRFZ44N MOSFET

IRFZ44N belongs to the family of  N-channel Power MOSFETs, covered in plastic body and uses “Trench” technology. Similar to other transistors, it has three terminals named as Gate, Drain and Source. 

6. Switch

A switch, in the context of networking is a high-speed device that receives incoming data packets and redirects them to their destination on a local area network (LAN). A LAN switch operates at the data link layer (Layer 2) or the network layer of the OSI Model and, as such it can support all types of packet protocols.

Requirement

Hardware Components

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7. 9 V Battery

An electric battery is a device consisting of one or more electrochemical cells with external connections provided to power electrical devices such as flashlights, and electric cars. When a battery is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode. 

8. Diode(4007)

A diode is an electronic device which allows the current to flow in one direction only and blocks in other direction.

It is a semiconductor device that comes with two terminals called anode and cathode. An anode is positive while the cathode is negative.

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Requirement

Hardware Components

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9. USB Cable

The resistance of a 3-5 ft cable is almost negligible assuming the cable isn't defective.

So, charging cable length does not matter. But the wrong cable can slow down charging speeds. USB cables have a data wire and a charging wire within the cable itself.

10. Transmitter Cable

Power supply is given to the transmitter. Copper coil is wound into number of turns as per the requirement. When the power is supplied to transmitter the coil energizes and results in the magnetic coupling. Hence the power is transferred.

Requirement

Hardware Components

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11. Receiver Coil

The secondary receiver coils are similar designs to the primary sending coils. Running the secondary at the same resonant frequency as the primary ensures that the secondary has low impedance at the transmitter's frequency and that the energy is optimally absorbed.

12. 1000UF Capacitor 25V

1000uF 25V Electrolytic Capacitor is a high quality electrolytic capacitor which offers long life and high reliability. Electrolytic Capacitors are most commonly used type of capacitors in Electronic Circuits. Electrolytic Capacitors have 2 Polaris - Positive and Negative.

Requirement

Hardware Components

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13. 5V Regulator

5V voltage regulator, a three-terminal positive regulator with a 5V fixed output voltage. This fixed regulator provides a local regulation, internal current limiting, thermal shut-down control, and safe area protection

14. Zero PCB

Zero PCB is basically a general-purpose printed circuit board (PCB), also known as preboard or DOT PCB. It is a thin rigid copper sheet with holes pre-drilled at standard intervals across a grid with 2.54mm (0.1-inch) spacing between holes.

Working Principle

• There are three techniques for wireless power transfer. Inductive charging has lower efficiency and increased resistive heating in comparison to direct contact. Implementations using lower frequencies or older drive technologies charge more slowly and generate heat within most portable electronics.
• Magnetic microwave has also some limitations Signal absorption by the atmosphere. Microwaves suffer from attenuation due to atmospheric conditions and towers are expensive to build. Researchers developed inductive charging using resonance where energy is transmitted between two copper coils that resonate at the same frequency.
• Of these two coils, one is the power transmitter and the other, the receiver. This is more feasible than other techniques and is safer than wired charging system.

Working

Block Diagram Of Wireless Mobile Charger

Benefits

• Easy access and save time .
• Ensures accuracy.
• It reduces the time as well as man power.
• Avoids misconceptions and arguments.

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Working

• This wireless charger consists of two coils transmitter coil and receiver coil, rectifier, oscillator tank circuit.
• Distance between the transmitter and receiver coil is 6cm. By using inductive charging it can charge the 1000mAh battery phone in just 30 min.
• This circuit consists of transformer, rectifier, oscillator tank circuit, transmitter coil, receiver coil, current amplifier. Initially, output current is 13mA so there is a need to amplify current by using a transistor based current amplifier whose gain is 0.93.
• Thereafter the output current found to be 450mA at 5V dc and it charges 100% battery in 30mins within the range of 6cms.

Designed System

Conclusion

• Wireless charging can be as efficient as a wired charging. Based on the reviewed literature and collected data, suggests that wireless power transmission could be feasible.
• Modern science has now made it possible to use electricity without having to plug in any wires for charging. There are three techniques for wireless power transfer. Inductive charging has lower efficiency and increased resistive heating in comparison to direct contact. Implementations using lower frequencies or older drive technologies charge more slowly and generate heat within most portable electronics.
• Magnetic microwave has also some limitations Signal absorption by the atmosphere. Microwaves suffer from attenuation due to atmospheric conditions and towers are expensive to build. Researchers developed inductive charging using resonance where energy is transmitted between two copper coils that resonate at the same frequency.

Thank you