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The Alliance for Wireless Power

A4WP sits at the epicenter of groundbreaking technology advancements within the wireless power space.

Positioned to support the evolution of wireless power technology, products and services, A4WP is a syndicate of leading global electronics companies working towards promoting an industry-wide, wireless power standard.

Put simply, the organization works to advance a more flexible way to wirelessly power and charge your devices.

Spatial freedom holds the potential to extend wireless power applications beyond sleeves and mats on a desktop to embedded charging surfaces in furniture, machines and vehicles. Other wireless power designs in use require precise alignment and close physical contact between the charging surface and the device to be charged. As the market and technology move toward designs that accommodate the way consumers want to use wireless power, these approaches will fit fewer use cases. To bring wireless power into conformity with real-world conditions, spatial freedom allows for higher variability in coupling coefficient, device sizes, load conditions and separation between the power transmitter and receiver.

Specification:

The objective of the A4WP specification is to match real-world charging situations as closely as possible, while minimizing the difficulty in building products that conform to them. A4WP will publish a specification to include requirements for the transmitter and receiver, mutual coupling and mutual inductance, leaving most options open to members’ designers.

Designers can specify and source their own out-of-band radios, power amplifiers, DC-to-DC converters, rectifiers, microprocessors – discrete or integrated – and assemble them as they require.

The current version of the A4WP specification is V1.0, and is available to all A4WP members.

Technical Publications:

PAPER: IEEE IMS WPT Conference 2013 WPT Operating Frequency Regulatory Considerations http://www.a4wp.org/IEEE%20IMS%20WPT%20Conference%202013%20WPT%20Operating%20Frequency%20Regulatory%20Considerations.pdf

SLIDES: IEEE IMS WPT Conference 2013 WPT Operating Frequency Regulatory Considerations http://www.a4wp.org/IEEE%20WPTC%202013%20Qualcomm%20%20Regulatory%20Slide%20Presentation%20(FNAL%2016May2013).pdf

PAPER: IEEE IMS WPT Conference 2013 A4WP Interoperability Specification Overview http://www.a4wp.org/IEEE%20IMS2013%20WPC%20A4WP%20Specification%20Introduction%20(Keynote%20Paper).pdf

SLIDES: IEEE IMS WPT Conference 2013 A4WP Interoperability Specification Overview http://www.a4wp.org/IEEE%20WPTC%202013%20A4WP%20Intro%20Keynote%20(FINAL%2013May2013).pdf

IEEE IMS WPT Workshop 2012 A4WP Magnetic Resonant WPT Physics, Circuits, and Standards http://www.a4wp.org/IEEE%20IMS2012%20LC%20WPT%20Technical%20Paper.pdf

An Overview of Market Outlook, Technology Direction and Membership Benefits http://www.a4wp.org/Business%20White%20Paper%20-%20A4WP.pdf