POWER RECEIVING UNIT, POWER TRANSMISSION UNIT, AND FEED SYSTEM

• US 20150102686A1
• Filed: 09/11/2014
• Published: 04/16/2015
• Est. Priority Date: 10/10/2013
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Washiro, Takanori, Yajima, Masakazu, Kikuchi, Kazuo, Hirabayashi, Takayuki
• Granted Patent: US 9,525,292 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/00 Adaptations of transformers or inductances for specific applications or functions
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 receiving unit includes: a power receiving section configured to receive electric power from a power transmission unit; and an electromagnet configured to be magnetized based on the electric power received from the power transmission unit.

Claims

1. A power receiving unit comprising:

a power receiving section configured to receive electric power from a power transmission unit; and

an electromagnet configured to be magnetized based on the electric power received from the power transmission unit.

2. The power receiving unit according to claim 1, wherein the electromagnet is electrically connected in series between the power receiving section and a load.

3. The power receiving unit according to claim 1, wherein the power receiving section includes

a second electrode configured to be paired with a first electrode provided in the power transmission unit, and

a power receiving circuit connected to the second electrode and including a rectifier circuit.

4. The power receiving unit according to claim 3, wherein the second electrode and the electromagnet are provided in proximity to a power receiving surface.

5. The power receiving unit according to claim 4, wherein

the second electrode has a flat shape and has an opening in a selective region of the flat shape, and

the electromagnet is provided in the opening of the second electrode.

6. The power receiving unit according to claim 1, further comprising a control section configured to control a current that flows to the electromagnet.

7. A power transmission unit comprising:

a power transmission section configured to supply electric power to a power receiving unit; and

a fixing section including a material to be attracted to a magnet,

wherein the power receiving unit includes

a power receiving section configured to receive the electric power from the power transmission section, and

an electromagnet configured to be magnetized based on the electric power received from the power transmission section.

8. The power transmission unit according to claim 7, wherein the power transmission section is provided along a vertical plane or an inclined plane.

9. The power transmission unit according to claim 7, wherein the fixing section is configured of iron (Fe), nickel (Ni), or cobalt (Co), or a material including any of iron, nickel, and cobalt.

10. The power transmission unit according to claim 7, wherein the power transmission section includes

a first electrode configured to be paired with a second electrode provided in the power receiving unit, and

a power transmission circuit connected to the first electrode and including an AC-signal generation source.

11. The power transmission unit according to claim 10, wherein the first electrode also serves as the fixing section.

12. The power transmission unit according to claim 10, wherein the fixing section is provided in a selective region corresponding to a mounting location of the electromagnet of the power receiving unit.

13. A feed system comprising:

a power receiving unit and a power transmission unit configured to allow feeding by being brought into contact with or proximity to each other,

wherein the power receiving unit includes

a power receiving section configured to receive electric power from the power transmission unit, and

an electromagnet configured to be magnetized based on the electric power received from the power transmission unit, and

the power transmission unit includes

a power transmission section configured to supply the electric power to the power receiving unit, and

a fixing section including a material to be attracted to a magnet.

14. The feed system according to claim 13, wherein the power transmission unit is installed to be in contact with the power receiving unit on a vertical plane or an inclined plane.

15. The feed system according to claim 14, wherein the power transmission unit is installed on a wall surface.

16. The feed system according to claim 13, wherein in the power receiving unit, the electromagnet is electrically connected in series between the power receiving section and a load.

17. The feed system according to claim 13, wherein the power receiving unit further includes a control section configured to control a current that flows to the electromagnet.