wireless driven led semiconductor lighting system

WIRELESS DRIVEN LED SEMICONDUCTOR LIGHTING

SYSTEM

PRESENTED BY, V M RAHUL

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OVERVIEW

• INTRODUCTION• WIRELESS POWER TRANSFER• TYPES OF WIRELESS POWER TRANSFER• WD-LED LIGHTING SYSTEM• APPLICATIONS• FUTURE SCOPE• CONCLUSION

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INTRODUCTION

• LED Lighting system.

• Wireless power transfer.

• Wireless driven led.

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WIRELESS POWER TRANSFER

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• In 1890, Sir Nikola Tesla Proposed a method of Wireless Power Transmission.

• The forgotten invention is reborn in 2007 by scientist’s of MIT.

• The transmission of energy from one place to another without using wires.

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ADVANTAGES

• WPT system would completely eliminates the existing high- tension power transmission line cable.

• Can reach the places which are remote.

• High Efficiency and Low cost maintenance.

• Power Theft will be negligible.

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CLASSIFICATION OF THE WIRELESS POWER TRANSMISSION SYSTEM

• Electromagnetism induction / Inductive charging.

• Capacitive coupling .

• Resonant inductive coupling .

• Microwave power transmission.

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ELECTROMAGNETISM INDUCTION

• Also known as inductive charging.

• Two coils: a primary transmitter and a secondary receiver.

• Energy transfer is due to Mutual Induction.

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INDUCTIVE COUPLING

• An induction coil to create an alternating electromagnetic field .

• A second induction coil takes power from the EM field and coverts it into electrical current .

• The transmission power and efficiency affects with distance.

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Advantage:

- It provides a safe way of connection.

- the products can be all enclosed and away

from air, water or plastic in the atmosphere

Disadvantage - require more electronics and coils - complex . - high cost.

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CAPACITIVE COUPLING• Consists of,

primary power transmitter - acting as a high frequency voltage source.

capacitive structure - functioning as the electric energy transfer

channel.

power receiver - acting as the secondary power conditioner, and supply the electric power to the load.

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Fig1: the structure of capacitive coupling power transfer

Fig2: the simplified Capacitive power transfer circuit

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Features

• In the coupling part- the field is confined between metal plates. - Capacitive structure.• System employs electric field as the energy carrying medium .

Advantage: Very small power loss.

Applications: - charging of cell phones ,digital products, biomedical device, electric car.

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RESONANT INDUCTIVE COUPLING

• Near field wireless transmission

• Combination of inductive coupling and resonance

• Resonance makes two objects interact very strongly

• Inductance induces current.

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• Distance between the coils is increased by adding resonance to the equation.

• Both systems should have same resonant frequency.

• The induction of electric power can be different.

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MICROWAVES POWER TRANSMISSION

• Belongs to far field technique.• Transmitting energy by use of microwaves.• Method for transferring energy to the surface of the

earth from solar power satellites.

• Steps:• Electrical energy to microwave energy• Capturing microwaves using rectenna.• Microwave energy to electrical energy

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MAGNETRON RECTENNA

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Disadvantage: - High cost. - Power in the transmission will interfere with present communication systems.

BASIC BLOCK DIAGRAM OF MICROWAVE POWER TRANSFER

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WIRELESS-DRIVEN LED LIGHTING SYSTEM

Advantages and Motivation:

- To be safer and more reliable .

- To make the LED lighting system waterproof.

- Flexible by using wireless power technique.

- Transferring electric power to LED lighting module through

air, water, glass and plastic without any electric connection.

- Improve the reliability to separate the drive circuit from

lighting chips.

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Applications:

Wireless-driven/charging LED lighting systems

Contactless-driven LED integrated chip/ module.

Fig : Schematic diagram of LED lights powered by wireless power transmission

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FUTURE SCOPE

• Power transmission from satellite to earth.Solar Power Satellites (SPS)

• Upcoming proof of this technology “COTA” by Ossia.• Wireless power transfer can be used to charge equipment's.• Wireless power transfer to charge vehicles.

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CONCLUSION

• Transmission without wires- a reality• Efficient.• Low maintenance cost. But, high initial cost• Better than conventional wired transfer• Energy crisis can be decreased• In near future, world will be completely wireless• The wireless power technique can be integrated with LED.

- LED products more convenient or reliable -Lighting field can be more enhanced.

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REFERENCE• 1.“Nobel Prize and Laureates”,

http://www.nobelprize.org/nobel_prizes/physics/laureates/2014/press.html

• 2. Wikipedia. (2012, August 7). Tesla coil [Online]. Avaliable:http://en.wikipedia.org/wiki/Tesla coil

• 3. Liang Huang and Aiguo Patrick Hu, “An overview of capacitively coupled power transfer—a new contactless power transfer solution”, 2013 IEEE 8th Conference onIndustrial Electronics and Applications(ICIEA), pp 461 -464.

• http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7127224&newsearch=true&queryText=WIRELESS%20DRIVEN%20LED%20%20%20SEMICONDUCTOR%20LIGHTING%20%20%20%20SYSTEM%20%0B&fname=&mname=&lname=&title=&volume=&issue=&spage=

QUERIES

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