US527857A,Maurice Hutin and Maurice Leblanc,"TRANSFORMER SYSTEM FOR ELECTRIC RAILWAYS",published 1894-10-23

Google and LG launched the Nexus 4 in October 2012 which supports inductive charging using the Qi standard. This section may contain excessive or irrelevant examples. Please help improve the article by adding descriptive text and removing less pertinent examples. ( April 2022)

Where are wireless charging coils used?

a b c d Alleven, M (2017). "Apple buoys wireless charging industry with WPC membership". FierceWirelessTech. ProQuest 1880513128. Nokia launched two smartphones (the Lumia 820 and Lumia 920) on 5 September 2012, which feature Qi inductive charging. [31] While charging at a distance has big potential, the public face of wireless charging has until now remained with charging pads. IHS Markit The following disadvantages have been noted for low-power (i.e., less than 100 watts) inductive charging devices, and may not apply to high-power (i.e., greater than 5 kilowatts) electric vehicle inductive charging systems. [ citation needed] Since the LCC compensation network is designed with a symmetrical structure, the following conditions can be reached:

Bradshaw, Tim. "Review: the joys of smartphone wireless chargers". Financial Times. Archived from the original on September 19, 2019. We have different coil concepts,” he says. “For example, the coil design is different for the 100 kW IPT system and the 200 kW Primove system. The IPT system uses a round coil design with a single phase while Primove uses three phase charging through a single coil. The sinusoidal current uses the three phases to provide a consistent magnetic field at 20 kHz.” The company's electromagnetic resonant technology allows power to transfer at distances of up to about nine inches away from a charging pad. That would allow electric cars to charge just by parking on top of a large charging pad.

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But WiTricity's main focus is the auto industry. The company, which is part of the AirFuel Alliance, expects a number of electric car manufacturers to announce wireless charging for their vehicles, according to WiTricity CEO Alex Gruzen.