its all about how a wire less charging work in smart phones

1. Electronics & Communication Engg.
SCHOOL OF ENGINEERING & TECHNOLOGY
Vikram University, Ujjain(M.P)
PRESENTED BY : SHUBHAM LONI
SEMESTER/YR : 5th,3rd year
Roll no. : 13160351

3. Index
 Existed Technique
 Introduction
 Working
 Qi
 Wireless charger
 Advantages
 Disadvantages
 Conclusion

4. Existed Technique
 Limited distance wire.
 Portable charger.
Fig 1. Mobile
charger
Fig 2. Portable mobile charger

5. INTRODUCTION
 Smartphone are changing the way we live our lives,
both online and off. With each new model, we are used
to getting more processor speed, new features and
programs, and entire new ways of using them. Despite
increased capabilities, battery life simply hasn’t kept
up.
 Imagine sitting down for a cup of coffee, and placing
your phone on the table. The phone lights up, and starts
to automatically charge – without connectors or cables.

6. How does wireless charging work?
 Also known as inductive charging, is a convenient and fuss-free way to
power up smartphone.
 Wireless chargers emit an alternating current via a transmitter coil,
which then induces a voltage in the receiver coil found in the device.
 Qi wireless charging pads are capable of charging Smartphone, tablets,
Bluetooth headsets, cameras and portable power packs.

8. Blue line: Magnetic Fields
Created when the current
flows through the coil
Yellow line: Flow of
energy from the sources
to Capture Coil

9. How do you know if your
smartphone is Qi compatible?
 If you have a wireless charger from Verizon, your
smartphone must be Qi compatible; all wireless
charging accessories sold by Verizon are Qi
certified.
 So how do you know if your phone is Qi
compatible? Your device should have a Qi logo on
it somewhere, so be sure to check the packaging,
the case and the manual.

10. Qi(inductive power standard)
•Qi (pronounced "Chee") is
an interface
standard developed by the
Wireless Power Consortium
for inductive electrical
power transfer over
distances of up to 4 cm (1.6
inches).

11.  Nokia launched two Smartphone (the Lumia
820 and Lumia 920) on 5 September 2012, which
feature Qi inductive charging.
 Now you can boost your Nokia Lumia’s battery without
plugging it in. Nokia Lumia 920 has wireless charging
built-in. And you can charge Nokia Lumia 820 wirelessly
by adding on a wireless charging shell .

12. Wireless Charger
Fig 2. Wireless charging plate.

13. Fig 3. wireless charging stand

14.  Wireless charging stand comes with NFC technology.
 Need to use your phone while it charges?
 No problem. Just tap via NFC to launch your chosen app, place phone on
the stand and you are in business.

15. Advantages
 Protected connections - no corrosion when the
electronics are all enclosed, away from water or oxygen
in the atmosphere.
 Use of separate chargers is eliminated.
 The need of different types of chargers by different
manufacturers is totally eliminated.
 Durability - Without the need to constantly plug and
unplug the device, there is significantly less wear and
tear on the socket of the device and the attaching
cable.

16. Disadvantages
 Lower efficiency, waste heat - The main
disadvantages of inductive charging are its lower
efficiency and increased resistive heating in
comparison to direct contact.
 Slower charging - due to the lower efficiency,
devices can take longer to charge when supplied
power is equal.
 More costly - Inductive charging also requires drive
electronics and coils in both device and charger,
increasing the complexity and cost of
manufacturing.

17.  Inconvenience - When a mobile device is
connected to a cable, it can be freely
moved around and operated while
charging. In current implementations of
inductive charging , the mobile device
must be left on a pad, and thus can't be
moved around or easily operated while
charging.

18. Future of wireless – consumer electronics
 Wireless Power will change our world…
IN THE AIR
AT HOME
AT WORK
AT THE CAFE
AT THE HOTEL
ON THE GO

19. AT WORK
Laptop
Digital Camera Coffee Mug
Cell Phone

20. IN THE AIR
Cell Phone
/ Kindle
Laptop

21. AT THE HOTEL
Digital Camera
Laptop
Kindle
Cell Phone

22. AT THE CAFÉ

23. ON THE GO
Parking Lot
GPS Tracking System
Media Player
Cell Phone / Bluetooth Device
Charging Car Battery

24. AT HOME

25. Conclusion
 Use the device application it can wirelessly charge up
the batteries which can save power, time and money in
a long run for the general public.

26. Are you Still Wired ??