Final07

ST. XAVIER’S TECHNICAL INSTITUTE : 

ST. XAVIER’S TECHNICAL INSTITUTE OMKAR HARANE D.E.T.E. 3RD YEAR 0803039 WIRELESS CHARGING PRESENTED BY

INTRODUCTION : 

INTRODUCTION Electronic gadgets today play an important role in comforting our life. Works on perishable batteries Require frequent charging. Cables causes tangling of wire. Limited range restricts its performance and range. Wireless charging works on principle called ‘WITRICITY’.

CONTENTS : 

CONTENTS METHODS OF CHARGING. ADVANTAGES. DISADVANTAGES. APPLICATIONS. MARKET DEMAND. BIBLIOGRAPHY.

Slide 4: 

Methods of charging Resonance Charging. Inductive Charging. Radio Charging.

Slide 5: 

Works on resonance phenomenon. Can deliver large power. Two copper coils are used. Both coils are tuned to same frequency. Frequency range:1MHz-20 MHz Resonance charging

Slide 6: 

Works distance: 3-5 meter. Power transfer not affected by room geometrics. Efficiency decreases due to obstacles between two coils. RESONANCE CHARGING (cont.)

INDUCTIVE CHARGING : 

INDUCTIVE CHARGING Works on Electromagnetic Induction. Created copper coil with alternating polarity. Transmitter: Electric energy → Electromagnetic energy. Receiver: Electromagnetic energy→ Electrical energy.

: 

Charger output:Up to 850mA and up to 8.5 Volts. Maximum charging: 20W+. Generally available in form of Charging pads. Range: 1cm or less. INDUCTIVE CHARGING (Cont.)

BASIC CHARGING PAD : 

BASIC CHARGING PAD Consist of receiver core attached to the device. Receiver pads intercept flux inducing charging current. Hence charging the device.

Slide 10: 

CHARGING PAD ‘WILDCHARGE’

Slide 12: 

Works on radio waves. Tuned resonant circuit receives the radio wave. Further rectified in a crystal set. Charger output: Several mV to 100mV. RADIO CHARGING

Slide 13: 

Continuous power supply for long duration. Suitable for devices with small power requirement. Range: Several dozen meters. RADIO CHARGING (Cont.)

ADVANTAGES : 

ADVANTAGES 1.] RESONANCE CHARGING Energy cannot be dispersed in space. Can supply power to moving devices. Efficiency not affected by room geometry. 2.] INDUCTIVE CHARGING Can charge multiple devices. Capability to detect legitimate device. Wont affect or erase any magnetic field. 3.] RADIO CHARGING Can deliver power through walls. Good for terminals with long standby times. Does not affect power transfer of any other device.

disadvantages : 

disadvantages 1.] Resonance Charging Method works for small distances. Efficiency affected by obstacles. 2.] Inductive Charging Contact with charging pad needed. Charging pad plugged to socket. Requires receiver core. 3.] Radio Charging Increase in distance decreases efficiency. Not suitable for efficient transfer of energy.

APPLICATION : 

APPLICATION Mobile phone charging Laptop computer’s MP3 players Robots Electric car’s

MARKET DEMANDS : 

MARKET DEMANDS Rapid improvement in radio technology efficiency. Technology Development Market Electromagnetic induction method surpasses 60% the threshold for regular use. Competing Technology Limits to increases in capacity of Li-ion batteries.

BIBLIOGRAPHY : 

BIBLIOGRAPHY Electronics Today(June 2008) www.wikipedia.com www.google.com