resonance charging

For centuries, scientists have known that resonance causes objects to reverberate when energy of a certain frequency or pitch is applied. In resonance charging, two copper coils are used. One coil, attached to a power source, is the sending unit. The other coil, attached to the device to be charged, is the receiver. Both coils are tuned to the same electromagnetic frequency. When objects of the same resonant frequency are placed close to one another, the energy produced can be transferred from one to the other. Researchers have been studying the potential of "non-radiative" objects with what they call "long-lived resonance." When an electromagnetic field is activated between these objects, the energy produced remains fixed in these objects, rather than being dispersed in space.

The idea of using lasers to wirelessly charge objects was considered. However, it is not very practical as lasers require an unobstructed line of sight and can also be dangerous. The energy produced between objects with long-lived resonances has little to no effect on the environment or biological organisms, making this method of charging much safer.

Here's an example of resonance charging used to deliver power to the battery of an electric car: The garage and car would both be equipped with copper coils. The garage would contain the transmitter, while the car would be equipped with the receiver. The transmitter supplies the room with a non-radioactive magnetic field. This field will adjust the power transfer, producing a powerful correlation between the sending and receiving unit and, as a result, delivering a charge to the car's battery.

Power transfer between the sending and receiving unit can be effectively achieved regardless of room geometrics or whether other objects are placed in the middle of the coils. Other electronics in the vicinity of the sending and receiving units will not pick up on the power transfer, as long as they are not tuned to the same electromagnetic frequency.

Resonance can also be used for wireless power rather than wireless charging. For example, a laptop equipped with a receiving unit and in the same room as the sending unit could receive an automatic charge as a constant flow of energy and not require the use of its own battery.

Learn more about Notebooks and Laptops

Do you have something to add to this definition? Let us know. Send your comments to techterms@whatis.com

More resources from around the web: - InfoWorld features resonance charging in the article 'Wireless charging: Here at last.'

FILE EXTENSION AND FILE FORMAT LIST File Extension and File Format List: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

RELATED CONTENT Nokia to enter the netbook market Nokia announced that it is expanding beyond its traditional mobile phone marketplace and will release a small Windows-powered netbook. Can the smartphone replace the laptop? As smartphones continue their rapid evolution, their capabilities may soon rival those of a laptop. Dell Latitude D430 with U7700: Laptop review by user An updated review by a user of the Dell Latitude D430 -- this time with U7700 -- discusses the updates.

RELATED GLOSSARY TERMS Terms from Whatis.com − the technology online dictionary digital multimedia broadcasting  (SearchMobileComputing.com) Digital multimedia broadcasting (DMB) is the process of multicasting by satellite or terrestrial services (or a combination of both) for reception by... inductive charging  (SearchMobileComputing.com) Inductive charging is a wireless charging method used for charging mid-sized items such as cell phones, MP3 players and PDAs... (Continued)