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Inductive charging. The primary coil in the charger induces a current in the secondary coil in the device being charged. Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in ...
The Qi standard is developed by the Wireless Power Consortium. [ 1 ] As a universal, open standard Qi-enabled devices are able to connect to Qi chargers from any manufacturer. Qi was first released in 2008, and by 2017 was incorporated into more than 200 smartphones, tablets and other devices. [ 3 ]
SonicEnergy publicly demonstrated wireless charging of several phones such as the iPhone 7 and the Samsung Galaxy S7 phones simultaneously to USA Today. [7] In September 2018, Meredith Perry stepped down from her role as CEO as the company changed to a business-to-business model. She was replaced by Jacqueline McCauley. [8]
When the phone is set on the pad, a coil in the pad creates a magnetic field [1] which induces a current in another coil, in the phone, charging its battery. Wireless power transfer (WPT; also wireless energy transmission or WET) is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system ...
Power Matters Alliance ( PMA) was a global, not-for-profit, industry organization whose mission was to advance a suite of standards and protocols for wireless power transfer for mobile electronic devices (specifically a type of inductive charging that competes with the Qi standard ). The organization was merged with Alliance for Wireless Power ...
SAE J2954. SAE J2954 is a standard for wireless power transfer (WPT) for electric vehicles led by SAE International. It defines three classes of charging speed, WPT 1, 2 and 3, at a maximum of 3.7 kW, 7.7 kW and 11 kW, respectively. This makes it comparable to medium-speed wired charging standards like the common SAE J1772 system.