WIRELESS- CHARGER BY A.S.KRISHNA
May 25, 2015
WIRELESS-CHARGER
BY
A.S.KRISHNA
CONTENTSABSTRACT
INTRODUCTION
WIRELESS CHARGING
PROPOSAL
CONCLUSION
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!
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.
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.
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.
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.
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.
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
Any
Quires ???