WIRELESS POWER TRANSMISSION DEVICE

• US 20140139036A1
• Filed: 11/15/2013
• Published: 05/22/2014
• Est. Priority Date: 11/19/2012
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: SHIJO, Tetsu, YAMADA, Akiko, OBAYASHI, Shuichi
• Application Number:
  US14/081,591
• Publication Number:
  US 20140139036A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• 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 50/005 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 50/12 of the resonant type

Abstract

According to one embodiment, there is provided a wireless power transmission device a magnetic core; a coil wound around the magnetic core; and at least one capacitor connected to the coil, wherein a notched part is formed at a part different from a part around which the coil is wound in the magnetic core, and the capacitor is arranged at the notched part or is arranged so as to be opposed to the notched part.

Claims

1. A wireless power transmission device comprising:

a magnetic core;

a coil wound around the magnetic core; and

at least one capacitor connected to the coil,

wherein

a notched part is formed at a part different from a part around which the coil is wound in the magnetic core, and

the capacitor is arranged at the notched part or is arranged so as to be opposed to the notched part.

2. The device according to claim 1,

wherein the notched part is formed at a part not including an end in a width direction of the coil in the magnetic core.

3. The device according to claim 2,

wherein the notched part is formed at a part including an end in a length direction of the coil in the magnetic core.

4. The device according to claim 1, further comprising a diode for rectification connected to the capacitor,

wherein the diode is arranged at the notched part or is arranged so as to be opposed to the notched part.

5. The device according to claim 4, further comprising a smoothing capacitor connected to the diode,

wherein the smoothing capacitor is arranged at the notched part or is arranged so as to be opposed to the notched part.

6. The device according to claim 1, comprising:

a plurality of capacitors; and

a switch selecting one or more of the capacitors to be connected to the coil,

wherein the capacitors and the switch are arranged at the notched part or are arranged so as to be opposed to the notched part.

7. A wireless power transmission device comprising:

a magnetic core;

a coil wound around the magnetic core; and

at least one capacitor connected to the coil,

wherein

a part different from a part around which the coil is wound in the magnetic core is made at least partially thinner than the part around which the coil is wound, and

the capacitor is arranged at the thinned part of the magnetic core or is arranged so as to be opposed to the part.

8. The device according to claim 7,

wherein the thinned part is a part not including an end in a width direction of the coil in the magnetic core.

9. The device according to claim 8,

wherein the thinned part is a part including an end in a length direction of the coil in the magnetic core.

10. The device according to claim 7, comprising a diode for rectification connected to the capacitor,

wherein the diode is arranged at the thinned part or is arranged so as to be opposed to the part.

11. The device according to claim 10, further comprising a smoothing capacitor connected to the diode for rectification,

wherein the smoothing capacitor is arranged at the thinned part or is arranged so as to be opposed to the part.

12. The device according to claim 7, comprising:

a plurality of capacitors; and

a switch selecting one or more of the capacitors to be connected to the coil,

wherein the capacitors and the switch are arranged at the thinned part or are arranged so as to be opposed to the part.

13. A wireless power transmission device comprising:

first and second magnetic core blocks arranged with a gap;

a coil wound around the first and second magnetic core blocks; and

at least one capacitor connected to the coil,

wherein the capacitor is arranged at a part different from a part around which the coil is wound in the gap between the first and second magnetic core blocks or is arranged so as to be opposed to the part.

14. The device according to claim 13, comprising a diode for rectification connected to the capacitor,

wherein the diode is arranged at the part different from the part around which the coil is wound in the gap between the first and second magnetic core blocks or is arranged so as to be opposed to the part.

15. The device according to claim 14, further comprising a smoothing capacitor connected to the diode for rectification,

wherein the smoothing capacitor is arranged at the part different from the part around which the coil is wound in the gap between the first and second magnetic core blocks or is arranged so as to be opposed to the part.

16. The device according to claim 13, comprising:

a plurality of capacitors at least one of which is the at least one capacitor; and

a switch configured to switch connection between the capacitors,

wherein the capacitors and the switch are arranged at the part different from the part around which the coil is wound in the gap between the first and second magnetic core blocks or are arranged so as to be opposed to the part.

17. A wireless power transmission device comprising:

a magnetic core;

a coil, one of end faces of the coil being in contact with the magnetic core; and

at least one capacitor connected to the coil,

wherein

a notched part is formed at a core part inside or outside the coil in the magnetic core, and

the capacitor is arranged at the notched part or is arranged so as to be opposed to the notched part.