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WIRELESS- CHARGER BY A.S.KRISHNA
33

Wi CR-Wireless Charging

May 25, 2015

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Technology

A.S. Krishna

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Many of us forgot to charge their mobile phones and if there any powercut we can't charge the mobiles right ! . These problem is solved here... For more details download this ppt Now.
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Page 1: Wi CR-Wireless Charging

WIRELESS-CHARGER

BY

A.S.KRISHNA

Page 2: Wi CR-Wireless Charging

CONTENTSABSTRACT

INTRODUCTION

WIRELESS CHARGING

PROPOSAL

CONCLUSION

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ABSTRACTWith mobile phones becoming a basic part of

life, the recharging of mobile phone batteries has always  been a problem. the mobile phones vary in their talk time and battery standby according to their  manufacture and batteries. all these phones irrespective of their manufacturer and batteries have to   be put to recharge after the battery has drained out.

The main objective of this current technology is to make the recharging of the mobile phones independent of their manufacturer and battery make. in this paper a new proposal has been made so as to make the recharging of the mobile phones is done automatically as you talk in your mobile phone!

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INTRODUCTIONWireless charging  (or) inductive

charging is built on the principles of wireless power provides an easier and more convenient means to charge a range of consumer electronic and industrial devices, providing a reliable and low maintenance system for power transfer compared with traditional cable based contact methods.

From smartphones and small electronic devices to mission critical equipment, wireless charging maintains safe, reliable transfer of power to ensure all forms of device and equipment are always charged and ready to go.

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WIRELESS CHARGINGWireless charging is based on the principle

of inductive power transfer (ipt) or magnetic resonance – the process of transferring energy between two objects through coils. a time varying magnetic field is induced in the transmitter coil by an alternating current (ac).

This sends energy from the charging base station (transmitter) to a coil in the target device (receiver) via a process called magnetic coupling. specialized circuitry on the receiver converts energy received through the magnetic coupling into dc which can then be used to charge the battery.

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1) Mains voltage is converted into high frequency alternating current (ac).

2) The alternating current is sent to the transmitter coil by the transmitter circuit.

3) Alternating current flowing within the transmitter coil creates a magnetic field which extends to the receiver coil (when within a specified distance).

4) The magnetic field generates current within the receiver coil of the device.

5) Current flowing within the receiver coil is converted into direct current (dc) by the receiver circuit, thus charging the battery of the device.

These basic principles are applied for inductive charging of consumer devices i.e. charging pads, as well as for large industrial wireless solutions.

This dc power can charge the battery or power a device without contact.

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PROPOSALTill now we saw the wireless

charging through the induction principle by placing the two coils.

But now we are going to see the wireless charging through the bluetooth device .

The basic addition to the mobile phone is going to be the rectenna. a rectenna is a rectifying antenna, a special type of antenna that is used to directly convert waves into dc electricity.

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Its elements are usually arranged in a mesh pattern, giving it a distinct appearance from most antennae. a simple rectenna can be constructed from a schottky diode placed between antenna dipoles.

There are minimal additions, which have to be made in the mobile handsets, which are the addition of a sensor, a rectenna, and a filter. with the above setup, the need for separate chargers for mobile phones is eliminated and makes charging universal. thus the more you talk, the more is your mobile phone charged! with this proposal the manufacturers would be able to remove the talk time and battery   stand by from their phone specifications.

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CONCLUSIONSome of the associated benefits of wireless chargers:-

Greater convenience and ubiquity for charging of everyday devices

Reduce cost associated with maintaining mechanical connectors

Safe powering or charging devices that need to remain sterile or hermetically sealed (waterproof)

Prevent corrosion due to elements such as oxygen and water

Eliminate sparks and debris associated with wired contacts

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Quires ???