wirless charging

1. Yue Wai Sze(17226279)
Xie Xin Ying(16251172)
Tse Man Fung (17225647)
Wireless
Charging
29 November 2017

2. Contents
Definition History Principle Types Pros & Cons Development

3. Definition
• Wireless charging uses electromagnetic fields to safely transfer
power from a transmitting source to a receiving device for the
purposes of wirelessly charging a battery, without using a
physical connection.

4. History
1902
• Tesla filed a patent titled
“Apparatus for Transmitting
Electrical Energy” in which
he describes a device that
he believed could transmit
electrical power from one
conductor to another
without the need for wires.
2006
• researchers at the MIT
reported that they had
discovered an efficient way
to transfer power between
coils separated by a few
meters.
2009
• a consortium of interested
companies called the
Wireless Power Consortium
announced they were
nearing completion for a
new industry standard for
low power Inductive
charging .

5. Principle
Wireless power transmission technologies
Use time-varying electric, magnetic, or electromagnetic fields.

6. Types
1. CLOSE RANGE
- Inductive charging technology.
- High efficiency, cost effective to deploy and easy to design and
work with.
- Supports a variety of devices, even the big ones like vehicles.

7. MID RANGE
- Uses resonance charging.
- Available in the market in 2016.
- Wireless charging becomes more accessible and can be installed
in more areas.
- Qi and Rezence (A4WP)
Types

8. Types
2. LONG RANGE (Not available now)
- Use a variety of different technologies, including radio
frequencies, infrared light, ultrasound etc.
- Long range charging is considered the holy grail of wireless
charging.
- Efficiency is questionable with long range charging as energy is
lost to the environment.
- likely only be limited to low power devices.

9. Types

10. Pros
• About a half of the
responders have positive
viewpoint of the wireless
charging.
• Another 21.9% have no
particular thoughts about
the wireless charging.
• The rest of 15.6% have
positive viewpoint to the
wireless charging.

11. Pros
• NO WIRE
• FREE
• EASY TO TAKE AWAY
• CONVENIENT

12. 1. Because they are not smart enough sometimes.
2. Connecting difficulty(Easy to be disconnected).
Cons

13. Development
• As advancements continue to be made, wireless charging will
likely become more ubiquitous and convenient.
-medicine and medical care.
-be high power autonomous charging for robotics and
unmanned vehicles.
-Wearable technology is becoming increasingly integrated and
available in our daily lives.

14. Development

15. Reference
• https://www.youtube.com/watch?v=JGcgEXUgIkA
• https://powerbyproxi.com/wireless-charging/#future-of-
wireless-charging
• https://www.chargespot.com/news/state-of-wireless-charging-
the-present-and-the-future/