Power feeding device

• US 10,084,351 B2
• Filed: 05/08/2015
• Issued: 09/25/2018
• Est. Priority Date: 05/19/2014
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Urano, Takashi
• Primary Examiner(s): Perez Borroto, Alfonso
• Application Number:
  US14/707,706
• Publication Number:
  US 20150333531A1
• Time in Patent Office: 1,236 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

A power feeding device reduced unnecessary power consumption, a high response before the start of transmission of power to a power receiving device, and an expanded power feeding area (or placement range) within which power can be transmitted to the power receiving device. A power feeding device stand for wireless transmission of power to a power receiving device including a power receiving coil includes a magnetic body formed into a flat plate shape and having two main surfaces, and a power feeding coil that is arranged at a certain position on either of the main surfaces. In power transmission, the power feeding coil is arranged at a certain position on either of the main surfaces, and the power receiving coil is arranged at a different position on either of the main surfaces from the position at which the power feeding coil is arranged.

Claims

1. A power feeding device for wireless transmission of power to a power receiving device including a power receiving coil, comprising:

a magnetic body having a flat plate shape with opposing flat, planar and parallel surfaces joined by edges; and

a power feeding coil that is arranged at a first position on the opposing flat, planar and parallel surfaces of the magnetic body,

wherein the power receiving coil is arranged at a second position on the opposing flat, planar and parallel surfaces of the magnetic body during power transmission, and the first position is different from the second position.

2. The power feeding device according to claim 1, wherein the power feeding coil includes an insulation-coated conductor wound therearound.

3. The power feeding device according to claim 1, wherein the magnetic body includes an insulating film that coats an outer surface of the magnetic body.

4. The power feeding device according to claim 1, wherein the power feeding coil and the power receiving coil are both arranged on one of the opposing flat, planar and parallel surfaces of the magnetic body.

5. The power feeding device according to claim 1, wherein the power feeding coil is arranged so that a central axis thereof is substantially perpendicular to the opposing flat, planar and parallel surfaces of the magnetic body.

6. The power feeding device according to claim 1, wherein:

the power feeding coil has two planar, parallel surfaces; and

one of the two planar, parallel surfaces of the power feeding coil faces one of the opposing flat, planar and parallel surfaces of the magnetic body.