Wireless power transfer apparatus and wireless power transfer system

Patent metadata

Field	Value
Publication number	US-10797529-B2
Application number	US-201616330539-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Oct 13, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A wireless power transfer apparatus according to the present invention is a wireless power transfer apparatus for transferring power to a power receiving apparatus. The wireless power transfer apparatus includes a support on which the power receiving apparatus is placed, a coil disposed below the support, the coil generating a high-frequency magnetic field upon receiving supply of a high-frequency current, a communication device disposed below the support to perform radio communication with the power receiving apparatus, a first magnetic shield member made of an electric conductor, the first magnetic shield member being disposed between the communication device and the coil, and a second magnetic shield member made of an electric conductor or a magnetic body, the second magnetic shield member being disposed on at least one of a lower surface and a lateral surface of the communication device.

First claim

The invention claimed is:

1. A wireless power transfer apparatus for transferring power to a power receiving apparatus, the wireless power transfer apparatus comprising:
a support on which the power receiving apparatus is placed;
a coil disposed below the support and configured to generate a high-frequency magnetic field upon receiving supply of a high-frequency current;
a communication device disposed below the support and configured to perform radio communication with the power receiving apparatus;
a first magnetic shield member made of an electric conductor, the first magnetic shield member being disposed between the communication device and the coil; and
a second magnetic shield member made of an electric conductor or a magnetic body, the second magnetic shield member being disposed on at least one of a lower surface and a lateral surface of the communication device,
wherein the first magnetic shield member and the second magnetic shield member are formed integrally with each other.

2. The wireless power transfer apparatus of claim 1 ,
wherein the first magnetic shield member is a magnetic shield ring that is formed in an annular shape and surrounds an outer periphery of the coil.

3. The wireless power transfer apparatus of claim 1 ,
wherein the second magnetic shield member is disposed on a lateral surface of the communication device that faces the coil.

4. The wireless power transfer apparatus of claim 1 ,
wherein the second magnetic shield member is configured to surround a lateral surface of the communication device.

5. The wireless power transfer apparatus of claim 1 ,
wherein the second magnetic shield member is disposed on a lateral surface of the communication device, and an upper end of the second magnetic shield member is positioned above an upper end of the coil.

6. The wireless power transfer apparatus of claim 1 ,
wherein the second magnetic shield member is disposed on a lateral surface of the communication device, and a lower end of the second magnetic shield member is positioned below a lower end of the coil.

7. The wireless power transfer apparatus of claim 1 ,
wherein the communication device is disposed at a position such that a strength of the high-frequency magnetic field generated from the coil is less than a radio field strength of radio communication between the communication device and the power receiving apparatus.

8. The wireless power transfer apparatus of claim 1 , comprising
a plurality of the coils,
wherein the communication device is disposed at a position such that a sum of strengths of the high-frequency magnetic fields generated from the plurality of coils is less than a radio field strength of radio communication between the communication device and the power receiving apparatus.

9. The wireless power transfer apparatus of claim 1 , comprising:
a plurality of the communication devices; and
a controller configured to control operation of the wireless power transfer apparatus based on communication information of at least one communication device among the plurality of communication devices.

10. A wireless power transfer system comprising:
the wireless power transfer apparatus of claim 1 , and
a power receiving apparatus detachably supported on the wireless power transfer apparatus,
wherein the power receiving apparatus includes
a power receiving coil configured to receive power from the coil when placed within the high-frequency magnetic field generated by the coil,
a second communication device configured to perform radio communication with the communication device of the wireless power transfer apparatus, and
a third magnetic shield member made of an electric conductor or a magnetic body, the third magnetic shield member being disposed on at least one of an upper surface and a lateral surface of the second communication device.

11. The wireless power transfer system of claim 10 ,
wherein the third magnetic shield member is disposed on a lateral surface of the second communication device that faces the power receiving coil.

12. The wireless power transfer system of claim 10 ,
wherein the third magnetic shield member surrounds a lateral surface of the second communication device.

13. The wireless power transfer system of claim 10 ,
wherein the third magnetic shield member is disposed on a lateral surface of the second communication device, and an upper end of the third magnetic shield member is positioned above an upper end of the power receiving coil.

14. The wireless power transfer system of claim 10 ,
wherein the third magnetic shield member is disposed on a lateral surface of the second communication device, and a lower end of the third magnetic shield member is positioned below a lower end of the power receiving coil.

15. A wireless power transfer apparatus for transferring power to a power receiving apparatus, the wireless power transfer apparatus, comprising:
a support on which the power receiving apparatus is placed;
a coil disposed below the support, the coil generating a high-frequency magnetic field upon receiving supply of a high-frequency current;
a communication device disposed below the support to perform radio communication with the power receiving apparatus;
a first magnetic shield member made of an electric conductor, the first magnetic shield member being disposed between the communication device and the coil;
a second magnetic shield member made of an electric conductor or a magnetic body, the second magnetic shield member being disposed on at least one of a lower surface and a lateral surface of the communication device;
an inverter circuit configured to supply a high-frequency current to the coil; and
a terminal block configured to connect a wiring of the coil to a wiring of the inverter circuit,
wherein the communication device is disposed at a position not overlapping the terminal block with respect to a vertical direction.

16. A wireless power transfer apparatus for transferring power to a power receiving apparatus, the wireless power transfer apparatus comprising:
a support on which the power receiving apparatus is placed;
a coil disposed below the support and configured to generate a high-frequency magnetic field upon receiving supply of a high-frequency current;
a communication device disposed below the support to perform radio communication with the power receiving apparatus;
a first magnetic shield member made of an electric conductor, the first magnetic shield member being disposed between the communication device and the coil; and
a second magnetic shield member made of an electric conductor or a magnetic body, the second magnetic shield member being disposed on at least one of a lower surface and a lateral surface of the communication device,
a plurality of the communication devices; and
a controller configured to control operation of the wireless power transfer apparatus based on communication information of at least one communication device among the plurality of communication devices,
wherein the controller is configured to control operation of the wireless power transfer apparatus based on communication information of one or more communication devices from among the plurality of communication devices, the one or more communication devices other than a communication device having a minimum radio field strength of radio communication with the power receiving apparatus.

17. The wireless power transfer apparatus of claim 16 ,
wherein the one or more communication devices include a communication device having a maximum radio field streng

Assignees

• Mitsubishi Electric Corp
• Mitsubishi Electric Home Appliance Co Ltd
• Mistubishi Electric Corp
• Mitsubishi Electric Home Application Co Ltd

Inventors

• Suga Ikuro
• Bunya Jun
• Asakura Ryota

Classifications

• H02J50/10 Primary

  using inductive coupling · CPC title

• H01F27/2885

  with shields or electrodes (shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36) · CPC title

• H05B2213/06

  Cook-top or cookware capable of communicating with each other · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H05B6/062

  for cooking plates or the like · CPC title