wireless energy transfer

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wireless energy transfer

The transfer of power to a device without wires. Although the wireless transfer of electromagnetic energy in the form of audio, video and data signals is ubiquitous, the wireless transfer of electrical power is relatively new.

Inductive Charging
Some devices already employ wireless energy transfer without the use of metal contacts. Known as "inductive charging," power is transferred through the plastic cases using magnetic induction; however, the device must be dropped into a charging base or placed on a charging mat. See Qi and AirFuel.

Resonance Charging
Magnetic resonance chargers charge batteries in low-power devices that are close but do not have to touch. As soon as a device is within range, data signals activate the charging. The farther the distance between device and charger, the longer the charging time. See AirFuel.

The Future
By using magnetic fields, some time in the future, electric vehicles are expected to be refueled within three feet of the charging station.

No Metal Contacts
With inductive transfer, power is transferred without a metal plug and socket. The toothbrush is dropped into its charging base, and the smartphone rests on its base (see Palm Pre).


No Metal Contacts
With inductive transfer, power is transferred without a metal plug and socket. The toothbrush is dropped into its charging base, and the smartphone rests on its base (see Palm Pre).


Wireless Power in the Car
In 2013, iOttie debuted the Easy Flex system for certain smartphones. The dashboard mount (top) is wired to the car's power, and an antenna coil (bottom) is lined up with the phone's internal battery terminals.
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The inductive charger tops up the 530e's 9.2-kWh battery pack in about three and a half hours, slightly slower than a standard charger.
Bosch's new Power Ready Wireless Charging System is a wireless charger (also known as an inductive charger).
Cayol, "Advanced modeling of a 2kW series-series resonating inductive charger for real electric vehicle", IEEE Trans.
On the basis of the iFixit Moto 360 teardown, however, (http://www.engadget.com/2014/09/09/moto-360-teardown/) Engadget raved about the round display and inductive charger of the smartwatch.
The Energizer Inductive Charger offers convenient, cord-free charging.
Energizer in the fall introduced a comprehensive line of universal USB chargers and cables and added a single zone inductive charger to the Qi-enabled products launched last year.
The new items include Ener-gizer Energi-to-Go external power packs, the Energizer Inductive Charger and Universal USB Chargers for homes and vehicles.
Launched in November, Energizer's Inductive Charger ($89) is based on Qi, a new inductive-charging standard that ultimately aims for universal compatibility.
By leading the way with one of the first Qi products - the EnergizerA[R] Inductive Charger - we are committed to bringing consumers this next generation technology that makes charging devices easier by eliminating cords and clutter," said Jim Olsen, VP of Marketing, Energizer.
Or they could embedded into the protective nylon or plastic sleeves for cellphones or MP3 players.<p>Fulton's technology is not used in the Palm Pre smartphone, apparently the first cell phone to offer the option of an inductive charger.<p>Dell said yesterday that the $199 laptop charging stand add-on kit for its Latitude Z was 70% efficient, making it better than other inductive charging systems.
Last year, Edison EV formed a partnership with Saturn retailers to provide charger installation services for GM's EV1 and secured an exclusive distributorship in California and Arizona for the Delco inductive charger designed for both the sporty coupe and the electric S-10 pickup.