This document discusses wireless charging, including its types, design overview, applications, advantages, and limitations. Wireless charging uses electromagnetic induction or resonance to transfer power between two coils without wires. The three main types are resonance charging, inductive charging, and radio charging. A wireless charging system consists of a transmitter, antenna, and receiver. Wireless charging can power devices like phones and laptops but has limitations in efficiency and range for larger devices.
Wireless Charging which is technically called as Inductive charging uses an electromagnetic field to transfer energy between two objects. This is actually done with the help of a charging station. Energy transferred can then be used to charge batteries or run the device.
more visit:- http://www.energous.com/
A presentation on wireless charging.
Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.
Wireless Charging which is technically called as Inductive charging uses an electromagnetic field to transfer energy between two objects. This is actually done with the help of a charging station. Energy transferred can then be used to charge batteries or run the device.
more visit:- http://www.energous.com/
A presentation on wireless charging.
Inductive charging (also known as wireless charging or cordless charging) uses an electromagnetic field to transfer energy between two objects through electromagnetic induction. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
Induction chargers use an induction coil to create an alternating electromagnetic field from within a charging base, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electric current to charge the battery. The two induction coils in proximity combine to form an electrical transformer Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.
Recent improvements to this resonant system include using a movable transmission coil (i.e. mounted on an elevating platform or arm) and the use of other materials for the receiver coil made of silver plated copper or sometimes aluminium to minimize weight and decrease resistance due to the skin effect.
Hi there,
Many of us forgot to charge their mobile phones and if there any powercut we can't charge the mobiles right ! . These problem is solved here... For more details download this ppt Now.
Wireless charging (also known as " Inductive charging ") uses an electromagnetic field to transfer energy between two objects.
This is usually done with a charging station.
Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
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 ;-)
Hi there,
Many of us forgot to charge their mobile phones and if there any powercut we can't charge the mobiles right ! . These problem is solved here... For more details download this ppt Now.
Wireless charging (also known as " Inductive charging ") uses an electromagnetic field to transfer energy between two objects.
This is usually done with a charging station.
Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device.
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 ;-)
No Wire is the brief description of the wireless technology and wireless power transmission. this presentation gives the overview of the wireless power transmission and also you can found the different types of the methods used to transfer the power wirelessly i mean the types of the wireless power transmission. ...................................................................................................................................................................................................................................................................
Introduction to Wireless Power Transfer and WitricityMln Phaneendra
Wireless Power Transfer has the ability to deliver major advancements in industries and applications that are dependent on physical, contacting connectors, which can be unreliable and prone to failure.
Wireless charging is making inroads in the healthcare, automotive and manufacturing industries because it offers the promise of increased mobility and advances that could allow tiny internet of things (IoT) devices to get power many feet away from a charger.
In 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.
It's a project on wireless mobile charging based on inductive charging. Most cellular devices that supports wireless charging are based on this type of wireless charging. This is a simulation based project done using PSpice software.
RF Energy Harvesting for Wireless DevicesIJERD Editor
Radio Frequency (RF) energy transfer and harvesting techniques have recently become alternative methods to empower the next generation wireless networks. As this emerging technology enables proactive energy replenishment of wireless devices, it is advantageous in supporting applications with quality of service requirements. In this paper, some wireless power transfer methods, RF energy harvesting networks, various receiver architectures and existing applications are presented. Finally, some open research directions are envisioned.
2. Content
What is Wireless Charging?
Types of Charging
Design Overview
Applications
Advantages of Wireless Charging
Limitations
Conclusion
3. What is Wireless Charging?
Wireless charging is one of the several methods of charging batteries
without the use of cable or device specific AC adaptors.
Wireless charging can be used for a wide variety of devices including cell
phones laptop computers and MP3 players as well as larger objects such
as robots and electric cars.
4. Methods of Charging
There are three types of wireless charging :-
Resonance Charging
Inductive Charging
Radio Charging
5. Resonance Charging
It uses phenomenon of “RESONANCE”, that causes an object to vibrate
when energy of certain frequency is applied.
Two copper coils are used one attached to transmitter & another to
receiver.
Both coils are tuned to same electromagnetic frequency.
These coils when placed close to one another power is transferred.
6. Examples:-
Electric cars.
Robots.
Vacuum Cleaners.
Laptop computers &
Other items that require large amounts of
power.
7. Inductive Charging
Inductive charging is one kind of short distance wireless charging.
This method works on the principle of “ELECTROMAGNETIC INDUCTION”
where the charger device will create an E.M field with alternating polarity
using a coil of insulated copper wire & a similar coil will be placed inside
the mobile device which will convert E.M field back to electric current
there by charging the battery.
8. Radio Charging
This method is on the basis that Radio Waves are widely in use to transmit
and receive cellular telephone, television, radio and Wi-Fi.
A Radio wave once transmitted, propagates in all directions until it reaches
an antenna tuned to proper frequency to receive it.
A transmitter plugged in to a socket, generates radio waves, when the
receiver attached to the device is set to the same frequency as the
transmitter, it will charge the device’s battery.
9. Design Overview
The basic design mainly consists of three
sole parts:
Transmitter
Antenna
Receiver
Wireless charger
Transmitter Antenna Receiver
11. Transmitter
A power transmitter acts as a power
source.
It will transmit power to the receiver
side.
The transmission signals are mainly in
between the RF/Microwave range.
(Typically 900Mhz)
12. Antennas
It plays an important role of mediator between transmitter & receiver.
Important specifications:
Impedance of antenna.
Gain of antenna.
Impedance of antenna should match o/p impedance of power transmitter and i/p
impedance of rectifier ckt.
Higher gain yields better result of design.
13. Receiver
The receivers main purpose is to charge an AAA battery.
For charging AC signal (microwave signal with a typical value of 900 MHz) is taken
and fed to a rectifier ckt to get a D.C signal.
A full-wave rectifier ckt is used because of its simplicity and efficiency in converting
A.C signal.
At the o/p of the rectifier, the signal is not a D.C signal yet. Thus by adding a
capacitor and a resistor a smooth o/p can be achieved.
14. Applications
Wireless Charging Pad for mobile devices
Inductive Coupling-RFID.
In-Vehicle Charging.
Radio Charging.
Ultra Wideband.
15. Limitations
Applicable for only small distance.
For the larger devices like electric car , charging stations may be limited.
Efficiency and power loss are the major problems