Rezence (wireless charging standard)
Wireless electrical power transfer standard
From Wikipedia, the free encyclopedia
Rezence (pronounced reh-zense) was an interface standard developed by the WiPower (A4WP) for wireless electrical power transfer based on the principles of magnetic resonance. The Rezence system consisted of a single power transmitter unit (PTU) and one or more power receiver units (PRUs). The interface standard supported power transfer up to 50 watts,[1] at distances up to 5 centimeters.[2] The power transmission frequency is 6.78 MHz, and up to eight devices could be powered from a single PTU depending on transmitter and receiver geometry and power levels. 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]
| Rezence | |
|---|---|
Official Rezence logo, representing the wireless charging standard and the Alliance for Wireless Power (A4WP) | |
| First published | 2012 |
| Organization | WiPower |
| License | Open standard |
| Copyright | Logo and trademark |
| Website | rezence |
The A4WP was formed in early 2012 with the intent to create a wireless power transfer standard to compete with the existing Qi standard. Board member companies[5] included Broadcom, Gill Electronics, Integrated Device Technology (IDT),[6] Intel,[7][8] Qualcomm, Samsung Electronics,[9] Samsung Electro-Mechanics, and WiTricity.[10]
In January 2015 A4WP and the Power Matters Alliance announced that the two organizations intended to merge into the AirFuel Alliance.[11]
See also
- Cordless
- WiPower
- Contactless energy transfer
- Inductive coupling
- Near field communication
- Bluetooth Smart
- Open Dots, a conductive charging standard promoted by Open Dots Alliance