POWER RECEIVER, AND ELECTRONIC APPARATUS AND NON-CONTACT CHARGER USING SAME

• US 20100156344A1
• Filed: 01/09/2007
• Published: 06/24/2010
• Est. Priority Date: 01/12/2006
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Materials Company Limited (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Materials Company Limited (Toshiba Corporation)
• Inventors: Suzuki, Masaharu, Kusaka, Takao, Inoue, Tetsuo
• Granted Patent: US 8,283,888 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/361 made of combinations of electrically conductive material and ferromagnetic material
• 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: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• 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 7/00302 Overcharge protection
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electronic apparatus (1) includes a power receiver (2) and an electronic apparatus main body (3). The power receiver (2) includes a power receiving coil (11) having a spiral coil, a rectifier (12) and a secondary battery (13). The electronic apparatus main body (3) includes an electronic device (14) and a circuit board (15). A magnetic foil (16) is arranged in at least one position between the spiral coil (11) and one of the secondary battery (13), the rectifier (12), the electronic device (14) and the circuit board (15).

Claims

1. A power receiver, comprising:

a power receiving coil having a spiral coil;

a rectifier for rectifying an AC voltage generated in the power receiving coil;

a secondary battery to which a DC voltage rectified by the rectifier is charged; and

a magnetic foil arranged in at least one position between the spiral coil and the secondary battery and between the spiral coil and the rectifier.

2. The power receiver according to claim 1,

wherein an outer peripheral edge of the magnetic foil is extended to an outside of an outer peripheral portion of the spiral coil.

3. The power receiver according to claim 1,

wherein the magnetic foil has an open portion formed in a position corresponding to a center of the spiral coil.

4. The power receiver according to claim 1,

wherein the magnetic foil has a slit.

5. The power receiver according to claim 1,

wherein the magnetic foil is divided into plural portions.

6. The power receiver according to claim 1,

wherein the magnetic foil includes an amorphous alloy strip or an Fe-based microcrystalline alloy strip.

7. The power receiver according to claim 1,

wherein the magnetic foil includes a magnetic sheet which has magnetic particles dispersed into a resin film.

8. The power receiver according to claim 1,

wherein the magnetic foil includes a magnetic sheet which has a magnetic thin film formed on a resin film.

9. An electronic apparatus, comprising:

a power receiver which is provided with a power receiving coil having a spiral coil, a rectifier for rectifying an AC voltage generated in the power receiving coil, and a secondary battery to which a DC voltage rectified by the rectifier is charged;

an electronic apparatus main body which is provided with an electronic device operated by the DC voltage supplied from the secondary battery and a circuit board on which the electronic device is mounted; and

a magnetic foil which is arranged in at least one position between the spiral coil and the secondary battery, between the spiral coil and the rectifier, between the spiral coil and the electronic device, and between the spiral coil and the circuit board.

10. The electronic apparatus according to claim 9,

wherein the magnetic foil is arranged between the spiral coil and the circuit board.

11. The electronic apparatus according to claim 9,

wherein the spiral coil is arranged around the secondary battery, and the magnetic foil is arranged between the spiral coil and the circuit board.

12. The electronic apparatus according to claim 9,

wherein the magnetic foil has a bent portion which is formed by bending an outer peripheral edge of the magnetic foil in a direction opposite to the circuit board.

13. The electronic apparatus according to claim 9,

wherein an outer peripheral edge of the magnetic foil is extended to an outside of an outer peripheral portion of the spiral coil.

14. The electronic apparatus according to claim 9,

wherein the magnetic foil has an open portion formed in a position corresponding to a center of the spiral coil.

15. The electronic apparatus according to claim 9,

wherein the magnetic foil has a slit.

16. The electronic apparatus according to claim 9,

wherein the magnetic foil is divided into plural portions.

17. The electronic apparatus according to claim 9,

wherein the magnetic foil has an amorphous alloy strip or an Fe-based microcrystalline alloy strip.

18. The electronic apparatus according to claim 9,

wherein the magnetic foil has a magnetic sheet which has magnetic particles dispersed into a resin film.

19. The electronic apparatus according to claim 9,

wherein the magnetic foil has a magnetic sheet which has a magnetic thin film formed on a resin film.

20. A non-contact charger, comprising:

the electronic apparatus according to claim 10; and

a power feeder which is provided with a power supplying coil disposed in non-contact with the power receiving coil of the electronic apparatus, and a power supply for supplying an AC voltage to the power supplying coil,

wherein a magnetic flux generated in the power supplying coil is transmitted to the power receiving coil to transmit electric power in a non-contact state.