FIELD THEORY

WITRICITY

PREET|patel (151310109032)

2nd Year Electrical

AIIE

CONTENTS:

• HISTORY

• BASICS

• WORKING

• ADVANTAGES

• DISADVANTAGES

• CONCLUSION

History of Wireless Power

• In 1899, Sir Nikola Tesla Proposed a

method of Wireless Power Transmission.

• As it is in Radiative mode, most of the

Power was wasted and has less efficiency.

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The forgotten invention is reborn in 2007

• The idea of wireless electricity has

been around since the early days of the

Tesla coil. But thanks to a group of MIT

scientists, team led by Marin Soljacic

and named it "WiTricity"

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Short range: Inductive Coupling

Medium range: Resonant Induction

Long range: Electromagnetic Wave Power Transfer

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Methods of transfer

WORKING

1. Power from mains to antenna, which is made of copper.2. Antenna resonates at a frequency of about 10MHz, producing electromagnetic waves.3. Tails' of energy from antenna tunnel up 2m.4. Electricity picked up by laptop antenna, which must also be resonating at 10 MHz Energy

used to recharge device.5. Energy transferred to laptop re-absorbed by source antenna. People/other objects not

affected as not resonating at 10MHz.

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It will make products :

•More Convenient:-No manual recharging or changing batteries.-Eliminate costly power cords.

•More Reliable:-Never run out of battery power.-Reduce product failure rates by fixing the ‘weakest link’: flexing wiring andmechanical interconnects.

•More Environmentally Friendly:-Reduce use of disposable batteries.-Use efficient electric ‘grid power’ directly instead of inefficient batteryCharging.

Benefits of WiTricity

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ADVANTAGES

• Safe, fairly efficient, good range.

• No need of line of sight.

• No need of power cables and batteries.

• Magnetic fields interact weakly with biological masses (humans), and energy is

only transmitted between resonating objects

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DISADVANTAGES

• Transmissions possible only in few meters

• Possibility of “energy theft”

• Efficiency decreases with distance

• The resonance condition should be satisfied.

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APPLICATIONS

• Consumer electronics

• Transportation

• Industry applications

• Other applications

1. Medical devices

2. Military applications

3. Robots

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THANK|you

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