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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 ...
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.
Qi (/ tʃ iː / CHEE) is an open standard for inductive charging developed by the Wireless Power Consortium.It allows compatible devices, such as smartphones, to receive power when placed on a Qi charger, which can be effective over distances up to 4 cm (1.6 in). [1]
Wireless energy transfer may be combined with wireless information transmission in what is known as Wireless Powered Communication. [37] In 2015, researchers at the University of Washington demonstrated far-field energy transfer using Wi-Fi signals to power cameras. [38]
5G wireless power is a technology based on 5G standards that transfers wireless power. [ 105 ] [ 106 ] It adheres to technical standards set by the 3rd Generation Partnership Project , the International Telecommunication Union , and the Institute of Electrical and Electronics Engineers .
The Wireless Power Consortium was started by Fulton Innovation, a 100% subsidiary of Alticor, parent company of Amway. The original motivation was to power a portable water purifier, sold by Amway, called eSpring, for which the wireless power transfer technology called eCoupled was created.
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.
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 ...