Patent · US Active

Balanced coil for multi-filar windings

US10647215B2 · kind B2 · utility

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24Claims

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Assignee

WiTricity Corporation · US

Inventors

Simon Islinger · Munich, DE
Leandro Percebon · Munich, DE
Nicholas Athol Keeling · Munich, DE

Key dates

Filing date	Sep 24, 2018
Grant date	May 12, 2020
Priority date	—
Expiry date	Oct 11, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T90/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A magnetic coil suitable for wireless power transfer comprises a layer of magnetically-permeable material and plural conductors that follow respective convoluted paths relative to the layer of magnetically-permeable material to form respective inductors. In use, the conductors have substantially equalized inductances based on the convoluted paths and interaction with the magnetically-permeable material. One way of achieving this is to place the conductors such that the overall proximity of the conductors to the layer of magnetically-permeable material along their respective lengths is substantially equal. In this way, the conductors are positioned substantially symmetrically with respect to the layer of magnetically-permeable material, such that an average distance of each individual section of the conductors proximate to the permeable layer is equal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.