POWER RECEIVING DEVICE, CONTROL METHOD THEREOF, AND FEED SYSTEM

• US 20170033608A1
• Filed: 03/05/2015
• Published: 02/02/2017
• Est. Priority Date: 04/02/2014
• Status: Active Grant

• Current Assignee: Sony Group Corp.
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: BUNSEN, Keigo
• Granted Patent: US 11,228,207 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00304 Overcurrent protection

Abstract

A power receiving device of the present disclosure includes a power generating unit and a control unit. The power generating unit generates direct-current power, on a basis of a power signal supplied from a power feeding device wirelessly. The control unit sets, on a basis of an output current of the power generating unit, an upper limit of the output current or an upper limit of output power of the power generating unit.

Claims

1. A power receiving device comprising:

a power generating unit that generates direct-current power, on a basis of a power signal supplied from a power feeding device wirelessly; and

a control unit that sets, on a basis of an output current of the power generating unit, an upper limit of the output current or an upper limit of output power of the power generating unit.

2. The power receiving device according to claim 1, wherein

the power generating unit includes a rectifier circuit that rectifies the power signal, and

the control unit sets the upper limit, on a basis of an output voltage of the rectifier circuit in addition to the output current.

3. The power receiving device according to claim 2, wherein the control unit sets the upper limit after elapse of predetermined time since the output voltage of the rectifier circuit becomes equal to or higher than a predetermined voltage.

4. The power receiving device according to claim 1, wherein the control unit sets the upper limit after elapse of predetermined time since the upper limit is changed.

5. The power receiving device according to claim 1, wherein

an entire possible range of a current value of the output current is divided into a plurality of segmentation ranges, and

the control unit sets the upper limit, in accordance with the segmentation range that the current value of the output current belongs to.

6. The power receiving device according to claim 5, wherein the control unit sets the upper limit after elapse of predetermined time since the segmentation range that the current value of the output current belongs to is changed.

7. The power receiving device according to claim 5, wherein the larger the current value of the output current is, the larger the upper limit is.

8. The power receiving device according to claim 1, wherein the control unit sets the upper limit, on a basis of an output voltage of the power generating unit in addition to the output current.

9. The power receiving device according to claim 1, further comprising a communication unit that performs communication with the power feeding device to instruct the power feeding device to increase or decrease an amount of power feeding.

10. The power receiving device according to claim 1, wherein the power generating unit includes a coil that receives the power signal.

11. The power receiving device according to claim 1, wherein the power generating unit includes a power receiving electrode that receives the power signal.

12. A method of controlling a power receiving device, the method comprising:

allowing a power generating unit to generate direct-current power, on a basis of a power signal supplied from a power feeding device wirelessly; and

setting, on a basis of an output current of the power generating unit, an upper limit of the output current or an upper limit of output power of the power generating unit.

13. A feed system comprising:

a power feeding device; and

a power receiving device,

the power receiving device including

a power generating unit that generates direct-current power, on a basis of a power signal supplied from a power feeding device wirelessly, and

a control unit that sets, on a basis of an output current of the power generating unit, an upper limit of the output current or an upper limit of output power of the power generating unit.