This presentations will describe wireless charging. What is the principal behind it, what is its scope and its applications. It further tells you about advantages and disadvantages of wireless charging, how it will be implemented in the near future. So don’t keep yourself away from knowing this exciting new technology ;-)

1. WIRELESS
CHARGING
Made By:-
Sagar Malhotra

2. What is Wireless charging ?
The current coming from the
wall power outlet moves
through the wire in the
wireless charger, creating a
magnetic field. The magnetic
field creates a current in the
coil inside the device. This coil
is connected to the battery
and the current charges the
battery. The two induction
coils in proximity combine to
form an electrical transformer.

3. How it Works
 It works on the
principle of
Electromagnetic
Induction.

4. Implementation

5. Continued…
 Induction chargers
typically use an
induction coil to create
an alternating
electromagnetic field
from within a charging
base station, and a
second induction coil
in the portable device
takes power from the
electromagnetic field
and converts it back
into electrical current
to charge the battery.

6. WIRELESS CHARGING STANDARDS
• Qi is a set of guidelines for
inductive charging units.
Right now it is a default
standard.
• It's rounded up 84
manufacturers, semicondu
ctors, and telecom
providers under its wing so
far, a number which no
other organizations have
come close to matching.

7. Other Standards
Underwriters
Laboratories
CONSUMER
ELECTRONIC
ASSOCIATION
This standard
under
development
by Qualcomm

8. Advantages
 Protected connections - no corrosion when the
electronics are all enclosed.
 Safer for medical implants - for embedded medical
devices, allows recharging/powering through the skin
rather than having wires penetrate the skin, which would
increase the risk of infection.
 Convenience - rather than having to connect a power
cable, the device can be placed on or close to a charge plate
or stand.
 No health implications: We won't need to worry about
trying to duck the attack of invisible rays. The WPC
established guidelines to ensure its products won't expose
us to levels of radiation or ionization that could cause any
harm to human tissue.

9. Disadvantages
 Lower efficiency, waste heat - The main disadvantages of
inductive charging are its lower efficiency and increased
resistive heating in comparison to direct contact
 More costly - Inductive charging also requires drive electronics
and coils in both device and charger, increasing the complexity
and cost of manufacturing.
 Slower charging - due to the lower efficiency, devices can take
longer to charge when supplied power is equal.
 Inconvenience - In current implementations of inductive
charging (such as the Qi standard), the mobile device must be
left on a pad, and thus can't be moved around or easily
operated while charging.
 Incompatibility - Unlike (for example) a standardized
MicroUSB charging connector, there are no de facto standards,
potentially leaving a consumer, organization or manufacturer
with redundant equipment when a standard emerges

10. Applications
In the home:
 Use your Qi-compatible kitchen counter to power your a
blender, or boil a pot of water.
 The sensors in the counter work to keep the pot boiling,
even though the surface itself is cool to the touch.
 If the pot needs to boil for ten minutes and then simmer
for two, you'll be able to program it to do so without need
for manual adjustments.

11. In the car: As demonstrated by Fulton Innovation at
CES 2011, we may also begin seeing electric-powered
vehicles get powered up via a manhole-sized
charging pad.

12.  In the office:
Imagine a conference room in which the table is
hooked up with Qi. Every person's laptop can be
getting fully charged during the presentation,
eliminating the need to have several power outlets
scattered up and down the room with dozens of
accompanying cords.

13. In the store:
 At the grocery store, you tell a smartphone app which
items you need to pick up.
 Each product would sit on top of a Qi pad that triggers
an electrolumiscient label on the item, lighting it up as
you approach it.
 Milk could flash different colored labels when it gets
closer to (and eventually reaches) its expiration date,
making it much easier for employees to identify and
get rid of it.

14. In public:
 If you're heading to the coffee shop, chances are you're
bringing your laptop or tablet. Having charging pads
embedded into the tables will keep you from lugging
extra cords around, leaves extra room for you (and
others) to enjoy, and keeps others from tripping on
your wires. Your lawyer will thank you.
 The same goes for airports, where Qi is already starting
to get integrated into seats and tables. Soon the time
will come when you don’t need to bring your charger
with you in flight.

15. BESIDES INDUCTIVE CHARGING, WHAT ELSE IS
THERE?
 WiTricity
 Powerbeam
 RCA Airpower

17. Powercast
 It coverts radio waves to DC current.
 The idea is to install a transmitter somewhere in the
house that broadcasts RF energy in the 850-950MHz
range, which an embedded sensor can pick up and
convert into a trickle charge from up to 40 feet away.

18. Powerbeam
 It uses optical "beams" to transmit energy wirelessly up
to 40 feet away.
 the amount of energy that can be transmitted
currently is around 5W.
 It technically can charge devices up to 10W, but it is
not useful for anything larger than a phone or tablet.