Method and apparatus for transmitting power and data without contact

• US 8,922,321 B2
• Filed: 06/28/2010
• Issued: 12/30/2014
• Est. Priority Date: 07/17/2009
• Status: Active Grant

• Current Assignee: Aska Electron Co., Ltd., Fujikura Limited, Yonezawa Electric Wire Company Limited (Fujikura Limited)
• Original Assignee: Aska Electron Co., Ltd., Fujikura Limited, Yonezawa Electric Wire Company Limited (Fujikura Limited)
• Inventors: Takaishi, Konomu
• Primary Examiner(s): Chan, Tsz
• Application Number:
  US13/382,215
• Publication Number:
  US 20120098634A1
• Time in Patent Office: 1,646 Days
• Field of Search: 336/200, 336/232
• US Class Current: 336/200
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/366 made of ferromagnetic material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

In a power and data transmission method which can transmit power and information (data) simultaneously and contactlessly, and an apparatus therefor, a pair of coil units are magnetically coupled to each other. Each of the coil units has: a power transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil; and an information transmission coil configured by a coil which is wound in a plane, and a magnetic shield member which is placed on a rear surface of the coil, the coil diameter of the information transmission coil is made different from that of the power transmission coil, and the information transmission coil and the power transmission coil are stacked. Data are transmitted while power is transmitted.

Claims

1. A power and data transmission method wherein a pair of coil units (1) are magnetically coupled to each other, each of said coil units having:

a power transmission coil (4) configured by a coil (2) which is wound in a plane, and a magnetic shield member (3) which is placed on a rear surface of said coil (2); and

an information transmission coil (7) configured by a coil (5) which is wound in a plane, and a magnetic shield member (6) which is placed on a rear surface of said coil (5), a coil diameter of said information transmission coil (7) being formed to be smaller than a coil diameter of said power transmission coil (4), said information transmission coil (7) being stackingly placed in a state where said information transmission coil is positioned in a coil outer circumferential portion of said power transmission coil (4), and data are transmitted while power is transmitted.

2. A power and data transmission apparatus wherein a pair of coil units (1) are magnetically coupled to each other, each of said coil units having:

a power transmission coil (4) configured by a coil (2) which is wound in a plane, and a magnetic shield member (3) which is placed on a rear surface of said coil (2); and

an information transmission coil (7) configured by a coil (5) which is wound in a plane, and a magnetic shield member (6) which is placed on a rear surface of said coil (5), a coil diameter of said information transmission coil (7) being formed to be smaller than a coil diameter of said power transmission coil (4), said information transmission coil (7) being stackingly disposed in a state where said information transmission coil is positioned in a coil outer circumferential portion of said power transmission coil (4), and data are transmitted while power is transmitted.