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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, an electrically powered transmitter device generates a time-varying electromagnetic field that transmits power across space to a receiver device; the receiver ...
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.
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 vehicles, power tools, electric toothbrushes, and medical devices.
The Alliance For Wireless Power is an industry standard group that uses the principles of magnetic resonance to develop a wireless energy transfer system over distance. The WiPower system uses directed and controlled magnetic fields to replace traditional power cords. [ 1 ]
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A Bluetooth Low Energy link was defined in the A4WP system intended for control of power levels, identification of valid loads and protection of non-compliant devices. [3] [4] The A4WP was formed in early 2012 with the intent to create a wireless power transfer standard to compete with the existing Qi standard.
The Wireless Power Consortium (WPC) is a multinational technology consortium formed on December 17, 2008, and based in Piscataway, New Jersey. Its mission is to create and promote wide market adoption of its interface standards Qi , Ki Cordless Kitchen, and Qi Medium Power for inductive charging .
Wireless electric energy transfer for experimentally powering electric automobiles and buses is a higher power application (>10 kW) of resonant inductive energy transfer. High power levels are required for rapid recharging and high energy transfer efficiency is required both for operational economy and to avoid negative environmental impact of ...