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Wireless Powering System
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Are we totally Wireless???
Most devices like mobile, PDA, digitalcamera, voice
recorders,MP3 players,
electrical razors., etc. are not totallywireless because they
require wiredpower chargers.
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Power cast
It is a innovative new technology whichenables wireless charging
of both smalland large devices.
Power cast system consists of
Power Caster or Transmitter
Power Harvester or Receiver
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General Power Cast System
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Power caster
Power caster is a device which converts the
input voltage into RF waves and radiatesthem all over its
confined range.
It acts just like a RF transmitter.
RF power transmissions typically delivermilliwatts of power to
devices using up to4 volts, making it ideal for recharging
smallbatteries in remote controls and flash-
memory based devices like iPods.
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Pin diagram of a Transmitter
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Features of Power Caster
Optimized for extending effective range withoutincreasing the
average power.
Low power consumption
Small size and Easily integrable.
A highly accurate and stable oscillator centred at905.8MHz
(902-928 MHz ISM band) is used tominimize distortion and
interference.
Far field Powering that delivers mwatts over
metres.Near field Powering that delivers watts over cms.
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Power Harvester - the real Innovation
Power Harvester is a chip which picks
up the radio waves from the air andconverts it into dc voltage
and chargesthe battery of a device.
It is a chip about half the size of an AAAbattery and must be
accompanied by a
small antenna.
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Features of Power Harvester
High conversion efficiency.
Over voltage protection.
No external components required excepta small antenna.
Small size and easily integrable.
Low power consumption (
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Power Cast - schematic diagram
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How is it different..?
Splash Power : In this system the deviceneeds to be placed on a
inductivecharging base or a pad to be charged.
It delivers large power but for very shortdistance
Unlike Solar Power, Power cast can bealways ON.
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AdvantagesPersonal devices need not be consciously
charged.
Ablility to charge isolated devices andsensors like temperature
sensors in A.Csand light sensors in the street lights
Can deliver Power through walls, ceilingsand surfaces.
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Advantages
Highest ratio of Power over distancecompared to other wireless
powersystems, from a few cms to many meters.
Ability to power any number of harvesterembedded devices through
a singlePower caster.
Harvester can convert any available RFenergy to usable charge
for the batteries.
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TheGreenadvantagePower Cast reduces the need for batteries
and numerous redundant adapters.
Even when Power cast is used to charge
a battery instead of the device directly, itavoids the use of
toxic ni-cd batteries .
This reduces a lot of electronic wasteand many toxic chemicals
which aredumped on earth and produce a lot of
harmful effects.
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Applications:-
Can power cell phones, watches, Remotecontrols,MP3 players,
electrical razors andsecurity devices.
Temperature sensors in A.Cs and lightsensors in automated
lightings.
Medical implants like hearing aid, Pacemakers,
defibrillators.
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