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Qi standard to support magnetic resonance charging

18 May 2012

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The Wireless Power Consortium has revealed that the Qi open wireless charging standard now offers full support and compatibility for longer-distance magnetic resonance technologies. According to consortium, Qi is supported by an expanding list of more than 100 industry-leading companies and is increasingly integrated into mobile phones, accessories and public spaces in the U.S., Japan, China and Europe.

The Qi standard is a fully open and flexible platform, and as it evolves, the WPC regularly approves new transmitter designs proposed by its members. The latest addition is a transmitter design that uses magnetic resonance technology. It increases the distance devices up to 5W can be charged, from 5-40mm, while remaining fully Qi compatible. This transmission distance is suitable for charging through most tables and counter tops, noted WPC.

Wireless charging stations such as those that can be built into furniture, tabletops, cars, or found in charging pads, typically use magnetic induction or magnetic resonance transmitters to send power to the portable devices they're charging. Having the flexibility to choose from multiple transmitter designs allows companies to offer a wide range of Qi product types in consumer electronics, home appliances, furniture, automotive and other markets, WPC stated. These products can then be further differentiated by innovative design, components, materials, functionality and value. Any Qi-enabled charger works with any Qi-enabled device, no matter what transmitter type.

Twelve new transmitter designs are approved in the specification, including those offering more freedom in device placement, magnetic and non-magnetic device alignment and differing power options such as USB. Many other designs are under review, with plans for additional spatial freedom and distances, increased power levels and more options to charge multiple devices simultaneously.




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