Witricity Corporation

Auckland Uniservices Limited

Adeel Zaheer

John Talbot Boys

Nicholas Athol Keeling

Grant Anthony Covic

Michael John Neath

Hui Zhi Beh

A magnetic structure for wireless power transfer has a plurality of pieces of magnetically permeable material arranged along a first dimension. Each piece is separated from a neighbouring piece by a gap defining a separation distance which is selected to prevent partial saturation of a region of the structure.

Current distribution and thermal regulation in inductive power transfer coupling structures

Systems and methods are described for a flush mount wireless charging power-transfer system. The techniques described in this document provide high mutual inductance with low leakage fields. These techniques also provide low surface flux densities in a base power transfer system, particularly for a component of a magnetic field that is tangential to the surface of the base power transfer system. Aspects include mechanical gaps located between ferrite structures in the coil window in the base power transfer system, and protrusions of ferrite on opposing sides of each gap. In addition, ferrite extensions are located beyond an outer boundary of the coil (e.g., in an x-direction) and extend upward above the plane of the coil (e.g., in a z-direction). The gaps, protrusions, and extensions separate the main flux from the side flux, reduce flux leakage, and improve mutual inductance between the base pad and a vehicle pad.

Flush-mount wireless charging power-transfer system

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Munich, Germany

Adeel Zaheer