WIRELESS POWER TRANSMISSION SYSTEM

• US 20120200150A1
• Filed: 11/03/2011
• Published: 08/09/2012
• Est. Priority Date: 02/08/2011
• Status: Abandoned Application

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: URANO, Takashi
• Application Number:
  US13/288,839
• Publication Number:
  US 20120200150A1
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A wireless power transmission system aims to feed power by wireless from a feeding coil to a receiving coil using a magnetic field resonance phenomenon between the feeding coil and receiving coil. The wireless power transmission system includes the feeding coil, receiving coil, a loading coil, and a power transmission control circuit. The power transmission control circuit supplies AC power to the feeding coil so as to make the feeding coil feed the AC power to the receiving coil. The loading coil is magnetically coupled to the receiving coil to receive the AC power from the receiving coil. A light control glass receives the AC power from the loading coil. The transparency of the light control glass is changed by the AC power received by the loading coil.

Claims

1. A wireless power transmission system for feeding power by wireless from a feeding coil to a receiving coil using a magnetic field resonance phenomenon between the feeding coil and receiving coil, the system comprising:

the feeding coil;

the receiving coil;

a power transmission control circuit that supplies AC power to the feeding coil so as to make the feeding coil feed the AC power to the receiving coil;

a loading coil that is magnetically coupled to the receiving coil to receive the AC power from the receiving coil; and

a light control glass that receives the AC power from the loading coil,

the transparency of the light control glass being changed by the AC power received by the loading coil.

2. The wireless power transmission system according to claim 1, wherein

both the feeding coil and receiving coil are installed in the inner wall of a building.

3. The wireless power transmission system according to claim 2, wherein

the feeding coil is installed in the ceiling of the building, and the receiving coil is installed in the side wall of the building.

4. The wireless power transmission system according to claim 1, wherein

the receiving coil and loading coil are installed so as to surround the light control glass.

5. The wireless power transmission system according to claim 1, wherein

the feeding coil is installed in the inner wall of a vehicle, and

the light control glass is fit in a vehicle window.

6. The wireless power transmission system according to claim 5, wherein

the receiving coil and loading coil are installed in the window frame of the vehicle.

7. The wireless power transmission system according to claim 1, further comprising a light sensor for measuring the brightness of a room, wherein

the power transmission control circuit controls the supply of AC power to the feeding coil according to the light amount detected by the light sensor.

8. The wireless power transmission system according to claim 1, further comprising a human sensing sensor, wherein

the power transmission control circuit stops supplying AC power to the feeding coil when the human sensing sensor reacts to make the light control glass opaque.

9. The wireless power transmission system according to claim 1, wherein

a plurality of the receiving coils are provided corresponding to a plurality of light control glasses, respectively, and power is collectively fed from the one feeding coil to the plurality of receiving coils.

10. The wireless power transmission system according to claim 1, wherein

the light control glass is installed as an outer wall of an elevator.

11. The wireless power transmission system according to claim 10, wherein

the inductance of the feeding coil is temporarily changed by a magnetic body installed in a part of a hoistway of the elevator.

12. A wireless power transmission system for feeding power by wireless from a feeding coil to a receiving coil using a magnetic field resonance phenomenon between the feeding coil and receiving coil, the system comprising:

the feeding coil;

the receiving coil;

a power transmission control circuit that supplies AC power to the feeding coil so as to make the feeding coil feed the AC power to the receiving coil;

a loading coil that is magnetically coupled to the receiving coil to receive the AC power from the receiving coil; and

an electric lock that receives the AC power from the loading coil,

the electric lock being activated or released by the AC power received by the loading coil.

13. A wireless power transmission system for feeding power by wireless from a feeding coil to a receiving coil using a magnetic field resonance phenomenon between the feeding coil and receiving coil, the system comprising:

the feeding coil installed as a part of a building;

the receiving coil installed as a part of the building;

a power transmission control circuit that supplies AC power to the feeding coil so as to make the feeding coil feed the AC power to the receiving coil;

a loading coil that is magnetically coupled to the receiving coil to receive the AC power from the receiving coil; and

a lighting apparatus that receives the AC power from the loading coil,

the lighting apparatus being turned ON by the AC power received by the loading coil.