MAGNETIC RESONANCE POWER TRANSMITTER AND MAGNETIC RESONANCE POWER RECEIVER

• US 20120212074A1
• Filed: 05/02/2012
• Published: 08/23/2012
• Est. Priority Date: 12/16/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: UCHIDA, Akiyoshi
• Granted Patent: US 9,450,455 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A magnetic resonance power transmitter of a magnetic resonance wireless power transmission system includes a resonance coil, an alternating current power source configured to cause the resonance coil to generate an alternating current, and a frequency changer configured to change, based on communication data, a frequency of the alternating current that the alternating current power source causes the resonance coil to generate.

Claims

1. A magnetic resonance power transmitter comprising:

a resonance coil;

an alternating current power source configured to cause the resonance coil to generate an alternating current; and

a frequency changer configured to change, based on communication data, a frequency of the alternating current that the alternating current power source causes the resonance coil to generate.

2. A magnetic resonance power transmitter comprising:

a resonance coil;

a coil configured to cause the resonance coil to generate an alternating current by electromagnetic induction;

an alternating current power source configured to cause the coil to generate an alternating current; and

a coupling changer configured to change, based on communication data, a coupling state by electromagnetic induction between the resonance coil and the coil.

3. The magnetic resonance power transmitter according to claim 2,

wherein the coupling changer changes the coupling state by changing a distance between the resonance coil and the coil.

4. The magnetic resonance power transmitter according to claim 2,

wherein the coupling changer changes the coupling state by arranging a magnetic body between the resonance coil and the coil.

5. The magnetic resonance power transmitter according to claim 2,

wherein the coupling changer changes the coupling state by changing an angle of the resonance coil or the coil.

6. The magnetic resonance power transmitter according to claim 2,

wherein the coupling changer changes the coupling state by changing a load resistance of the resonance coil or the coil.

7. A magnetic resonance power receiver comprising:

a resonance coil;

a coil to which power is supplied by electromagnetic induction from the resonance coil;

a power receiver configured to receive power supplied to the coil; and

a coupling changer configured to change, based on communication data, a coupling state by electromagnetic induction between the resonance coil and the coil.

8. The magnetic resonance power receiver according to claim 7,

wherein the coupling changer changes the coupling state by changing a distance between the resonance coil and the coil.

9. A magnetic resonance power receiver comprising:

a resonance coil;

a coil to which power is supplied by electromagnetic induction from the resonance coil;

a power receiver configured to receive power supplied to the coil; and

a resonance frequency changer configured to change a resonance frequency of the resonance coil based on communication data.

10. The magnetic resonance power receiver according to claim 9,

wherein the resonance frequency changer changes the resonance frequency by changing a capacitance of the resonance coil.