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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 11056919 B1

PDFFull Text
Date of Patent:
Jul. 06, 2021

Filed:

Apr. 18, 2018

Power transmission device and wireless power transmission system

Applicant:

Panasonic Corporation, Osaka, JP;

Inventors:

Hiromu Matsumoto, Osaka, JP;

Hiroshi Kanno, Osaka, JP;

Atsushi Yamamoto, Kyoto, JP;

Assignee:

PANASONIC CORPORATION, Osaka, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Rexford N Barnie

Assistant Examiner:

Elim Ortiz

Int. Cl.
CPC ...
H02J 50/60 (2016.01); H02J 50/12 (2016.01); H02J 50/10 (2016.01); H02J 50/40 (2016.01); H02J 50/70 (2016.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01); H01F 38/14 (2006.01); H02J 5/00 (2016.01); H02J 7/02 (2016.01); H02J 7/00 (2006.01);
U.S. Cl.
CPC ...
H02J 50/12 (2016.02); H01F 38/14 (2013.01); H02J 5/00 (2013.01); H02J 7/0042 (2013.01); H02J 7/0044 (2013.01); H02J 7/025 (2013.01); H02J 50/10 (2016.02); H02J 50/40 (2016.02); H02J 50/60 (2016.02); H02J 50/70 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02);
Abstract

A power transmission device includes power transmission coils arranged in a line, a power transmission circuit connected to the power transmission coils and supplying the AC power to the power transmission coils, and control circuitry that switches an electrical connection state between the power transmission circuit and each of the power transmission coils, detect a relative position between the power receiving coil and each of the power transmission coils, selects a number of power transmission coils adjacent to each other based on the detected relative position, the selected number of power transmission coils being fixed, and causes the power transmission circuit to supply the AC power to the selected number of power transmission coils. In an array direction of the power transmission coils, a width Dwt of each of the power transmission coils is shorter than a width Dwr of the power receiving coil and Dwt/Dwr≤0.875.

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