TRANSMISSION COIL FOR WIRELESS POWER TRANSMISSION

• US 20120228955A1
• Filed: 02/28/2012
• Published: 09/13/2012
• Est. Priority Date: 03/07/2011
• Status: Abandoned Application

• Current Assignee: Advantest Corporation
• Original Assignee: Advantest Corporation
• Inventors: Endo, Yuki, Furukawa, Yasuo
• Application Number:
  US13/407,576
• Publication Number:
  US 20120228955A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A transmission coil is mounted in a wireless power supply apparatus, and is configured to transmit an electric power signal including any one from among an electric field, a magnetic field, and an electromagnetic field. The transmission coil includes a loop coil and a magnetic member. The magnetic member is configured to cover a particular portion of the loop coil. For example, the loop coil may be configured to have a shape in which a first side and a second side are substantially in parallel with each other. The magnetic member may be configured to cover the first side of the loop coil.

Claims

1. A transmission coil for a wireless power supply apparatus configured to transmit an electric power signal including any one from among an electric field, a magnetic field, and an electromagnetic field, the transmission coil comprising:

a loop coil; and

a magnetic member configured to cover a portion of the loop coil.

2. A transmission coil according to claim 1, wherein the loop coil includes a first side and a second side that are arranged substantially in parallel with each other,

and wherein the magnetic member is configured to cover the first side of the loop coil.

3. A transmission coil according to claim 2, wherein the loop coil is configured to have a rectangular shape the long sides of which correspond to the first side and the second side.

11. A wireless power supply apparatus comprising:

a transmission coil according to claim 1;

a resonance capacitor arranged in series with the transmission coil; and

a power supply configured to supply a driving signal to a resonance circuit formed of the transmission coil and the resonance capacitor.

4. A transmission coil for a wireless power supply apparatus configured to transmit an electric power signal including any one from among an electric field, a magnetic field, and an electromagnetic field, the transmission coil comprising:

a first loop coil;

a second loop coil;

a first magnetic member configured to cover a portion of the first loop coil that is farther from the second loop coil; and

a second magnetic member configured to cover a portion of the second loop coil that is farther from the first loop coil.

5. A transmission coil according to claim 4, wherein the first loop coil is configured to have a first side and a second side arranged substantially in parallel with each other,

and wherein the second loop coil is configured to have a third side and a fourth side arranged substantially in parallel with each other,

and wherein the first magnetic member is configured to cover the side from among the first side and the second side that is farther from the second loop coil,

and wherein the second magnetic member is configured to cover the side from among the third side and the fourth side that is farther from the first loop coil.

6. A transmission coil according to claim 5, wherein the first loop coil and the second loop coil are each configured to have a rectangular shape the respective long sides of which correspond to the first side, the second side, the third side, and the fourth side.

13. A wireless power supply apparatus comprising:

a transmission coil according to claim 4;

a resonance capacitor arranged in series with the transmission coil; and

a power supply configured to supply a driving signal to a resonance circuit formed of the transmission coil and the resonance capacitor.

14. A wireless power supply system comprising:

a wireless power supply apparatus according to claim 13; and

a wireless power receiving apparatus configured to receive an electric power signal from the wireless power supply apparatus.

7. A transmission coil for a wireless power supply apparatus configured to transmit an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field, the transmission coil comprising:

a solenoid coil; and

a magnetic member configured to cover a particular portion of the solenoid coil.

8. A transmission coil according to claim 7, wherein the solenoid coil is configured to have a cross-sectional shape wherein a first side and a second side are arranged substantially in parallel with each other,

and wherein the magnetic member is configured to cover a portion of the solenoid coil that corresponds to the first side.

9. A transmission coil according to claim 8, wherein the solenoid coil is configured to have a rectangular cross-sectional shape the long sides of which correspond to the first side and the second side.

15. A wireless power supply apparatus comprising:

a transmission coil according to claim 7;

a resonance capacitor arranged in series with the transmission coil; and

a power supply configured to supply a driving signal to a resonance circuit formed of the transmission coil and the resonance capacitor.

16. A wireless power supply system comprising:

a wireless power supply apparatus according to claim 15; and

a wireless power receiving apparatus configured to receive an electric power signal from the wireless power supply apparatus.

10. A transmission coil for a wireless power supply apparatus configured to transmit an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field, the transmission coil comprising:

an antenna coil; and

a magnetic member configured to cover a particular portion of the antenna coil.

12. A wireless power supply system comprising:

a wireless power supply apparatus according to claim 10; and

a wireless power receiving apparatus configured to receive an electric power signal from the wireless power supply apparatus.

17. A wireless power supply apparatus comprising:

a transmission coil according to claim 10;

a resonance capacitor arranged in series with the transmission coil; and

a power supply configured to supply a driving signal to a resonance circuit formed of the transmission coil and the resonance capacitor.

18. A wireless power supply system comprising:

a wireless power supply apparatus according to claim 17; and

a wireless power receiving apparatus configured to receive an electric power signal from the wireless power supply apparatus.