MOBILE TYPE NON-CONTACT POWER FEEDING DEVICE

• US 20110248574A1
• Filed: 04/06/2011
• Published: 10/13/2011
• Est. Priority Date: 04/07/2010
• Status: Active Grant

• Current Assignee: Showa Aircraft Industry Company Limited (Bain Capital Holdings LP)
• Original Assignee: Showa Aircraft Industry Company Limited (Bain Capital Holdings LP)
• Inventors: SATO, Takeshi, ABE, Keisuke, OKIYONEDA, Yasuyuki, MOCHIZUKI, Masashi, YAMAMOTO, Kitao
• Granted Patent: US 8,528,710 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 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 90/14 Plug-in electric vehicles

Abstract

A non-contact power feeding device feeds power from a power transmission coil to a power receiving coil based on a mutual induction effect of electromagnetic induction. In such a non-contact power feeding device, power can be fed to the power receiving coil by a mobile power feeding method whereby the power receiving coil is moved corresponding to the stationary power transmission coil through an air gap in the case of power feeding. The power transmission coil and the power receiving coil are respectively formed in a loop-shaped flat structure. A crossover coil is adopted to serve as the power transmission coil. The crossover coil is formed in a long loop shape along the direction of movement of the power receiving side and is crossed along the way to provide a plurality of units. It is however to be noted that a resonant repeating coil can be used together with the power transmission coil to adopt the crossover coil as its repeating coil.

Claims

1. An apparatus for non-contact feeding of power from a power transmission coil of a power feeding circuit to a power receiving coil of a power receiving circuit by electromagnetic induction, the apparatus comprising the power receiving coil being arranged to move relative to the stationary power transmission coil through an air gap, the power receiving coil comprising a flat loop, the power transmission coil, being a crossover coil constituted of an array of a plurality of flat loops elongated in the direction of said movement and separated from each other by a crossover, each of the loops of the crossover coil being considered a unit.

2. The apparatus according to claim 1, wherein the crossovers effect reversal of direction of a magnetic field generating from the units in plus direction and minus direction from one unit to the next.

3. The apparatus according to claim 2, wherein area of the units generating a magnetic field in the plus direction is equal to that of the units generating a magnetic field in the minus direction.

4. The apparatus according to claim 1, wherein a repeating coil of a repeating circuit is fixedly disposed relative to the power receiving coil of the power receiving circuit, the repeating circuit is independent of the power receiving circuit, and the repeating coil resonates with a capacitor disposed in the repeating circuit and moves together with the power receiving coil.

5. The apparatus according to claim 1, wherein the power transmission coil of the power feeding circuit is fixedly disposed alongside and above a road surface or a ground surface.

6. The apparatus according to claim 1, wherein the power transmission coil of the power feeding circuit is fixedly disposed on or embedded in a road surface or a ground surface.

7. The apparatus according to claim 1, wherein the power receiving coil of the power receiving circuit is mounted on a vehicle or other movable body.

8. An apparatus for non-contact feeding of power from a power transmission coil of a power feeding circuit to a power receiving coil of a power receiving circuit by electromagnetic induction, the apparatus comprising the power receiving coil being arranged to move relative to the stationary power transmission coil through an air gap, the power receiving coil and the power transmission coil each comprising a flat loop, a repeating coil of a repeating circuit fixedly disposed relative to the power transmission coil, the repeating circuit being independent of the power feeding circuit, the repeating coil resonating with a capacitor disposed in the repeating circuit, the power receiving coil being arranged to move relative to the repeating coil through an air gap for power feeding, and the repeating coil being a crossover coil constituted of an array of a plurality of flat loops elongated in the direction of said movement and separated from each other by a crossover, each of the loops of the crossover coil being considered a unit.

9. The apparatus according to claim 8, comprising a capacitor for each unit of the repeating coil.

10. The apparatus according to claim 8, wherein direction of a magnetic field generating from the units formed by the crossovers is alternately reversed in the plus direction and in the minus direction.

11. The apparatus according to claim 10, wherein area of the units generating a magnetic field in the plus direction is equal to that of the units generating a magnetic field in the minus direction.

12. The apparatus according to claim 8, wherein a repeating coil of a second repeating circuit is fixedly disposed relative to the power receiving coil of the power receiving circuit, the second repeating circuit is independent of the power receiving circuit, and the repeating coil of the second repeating circuit resonates with a capacitor disposed in the second repeating circuit and moves together with the power receiving coil.

13. The apparatus according to claim 8, wherein the power transmission coil of the power feeding circuit and the repeating coil of the repeating circuit are fixedly disposed alongside or above a road surface or a ground surface.

14. The apparatus according to claim 8, wherein the power transmission coil of the power feeding circuit and the repeating coil of the repeating circuit are fixedly disposed on or embedded in a road surface or a ground surface.

15. The apparatus according to claim 8, wherein the power receiving coil of the power receiving circuit is mounted on a vehicle or other movable body.