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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10377255 B1

PDFFull Text
Date of Patent:
Aug. 13, 2019

Filed:

May. 13, 2016

Methods and apparatus for reducing flux cancellation in ferrite of double couple inductive power transfer systems

Applicant:

Witricity Corporation, Watertown, MA (US);

Inventors:

Mickel Bipin Budhia, Auckland, NZ;

Chang-Yu Huang, Auckland, NZ;

Nicholas Athol Keeling, Munich, DE;

Michael Le Gallais Kissin, Auckland, NZ;

Jonathan Beaver, Auckland, NZ;

Assignee:

WiTricity Corporation, Watertown, MA (US);

Attorney:

Knobbe Martens Olson & Bear LLP

Primary Examiner:

Jerry D Robbins

Int. Cl.
CPC ...
B60L 53/12 (2019.01); B60L 11/18 (2006.01); B60L 5/00 (2006.01); H01F 27/24 (2006.01); H01F 27/40 (2006.01); H01F 38/14 (2006.01); H01F 41/02 (2006.01); H01F 41/06 (2016.01); H02J 7/02 (2016.01); H03H 7/38 (2006.01); H02J 7/00 (2006.01); H02J 50/10 (2016.01); H02J 50/40 (2016.01); H02J 50/12 (2016.01); H02J 50/50 (2016.01);
U.S. Cl.
CPC ...
B60L 11/182 (2013.01); B60L 5/005 (2013.01); B60L 53/12 (2019.02); H01F 27/24 (2013.01); H01F 27/40 (2013.01); H01F 38/14 (2013.01); H01F 41/0206 (2013.01); H01F 41/06 (2013.01); H02J 7/0042 (2013.01); H02J 7/025 (2013.01); H02J 50/10 (2016.02); H02J 50/12 (2016.02); H02J 50/40 (2016.02); H02J 50/50 (2016.02); H03H 7/38 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/7072 (2013.01); Y02T 90/122 (2013.01); Y02T 90/14 (2013.01);
Abstract

According to some implementations, an apparatus for transmitting charging power wirelessly to a load is provided. The apparatus comprises at least one ferrite structure comprising a first ferrite portion, a second ferrite portion comprising at least a first ferrite leg, a second ferrite leg, and a third ferrite leg, each physically separated from the first ferrite portion by a first distance, and a third ferrite portion positioned between the second ferrite leg and the first ferrite portion and physically contacting the second ferrite leg. The at least one ferrite structure further comprises a coil wound around the second ferrite leg and configured to generate an alternating current under influence of an alternating magnetic field.

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