Wireless power supply system and wireless power transmission system

• US 10,272,789 B2
• Filed: 05/14/2015
• Issued: 04/30/2019
• Est. Priority Date: 05/19/2014
• Status: Active Grant

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Chiyo, Noritaka, Terasaki, Yasuhiro, Suzuki, Mitsunari
• Primary Examiner(s): McCarry, Jr., Robert J
• Application Number:
  US15/304,817
• Publication Number:
  US 20170043668A1
• Time in Patent Office: 1,447 Days
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60M 1/36 Single contact pieces along the line for power supply
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/361 made of combinations of electrically conductive material and ferromagnetic material
• 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 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A wireless power supply system is a wireless power supply system provided with a travel lane for wirelessly transmitting power to a moving body and includes a power transmitting coil that is disposed such that the axial direction of the coil is substantially parallel to the width direction of the travel lane, and electromagnetic shielding walls that are disposed on the respective sides of the travel lane in the extension direction of the travel lane.

Claims

1. A wireless power supply system provided with a travel lane for wirelessly transmitting power to a moving body, the wireless power supply system comprising:

a power transmitting coil that is wound around an axis extending in an axial direction, the axial direction being substantially parallel to a width direction of the travel lane; and

a pair of electromagnetic shielding walls that are respectively disposed along two corresponding sides of the travel lane so as to reduce leakage of magnetic flux generated by the power transmitting coil.

2. The wireless power supply system according to claim 1, wherein the electromagnetic shielding walls each include a magnetic wall and a conductive wall that is disposed on an external side of the magnetic wall.

3. The wireless power supply system according to claim 2, further comprising a magnetic coupling member that magnetically couples the magnetic walls disposed on the respective sides of the travel lane with each other.

4. The wireless power supply system according to claim 3, further comprising a conductive sheet that is disposed between the power transmitting coil and the magnetic coupling member.

5. A wireless power transmission system comprising:

the wireless power supply system according to claim 1; and

a moving body on which a power receiving coil is mounted, wherein

the electromagnetic shielding walls have a height that is higher than a height at which the power receiving coil is positioned.

6. A wireless power transmission system comprising:

the wireless power supply system according to claim 2; and

a moving body on which a power receiving coil is mounted, wherein

the electromagnetic shielding walls have a height that is higher than a height at which the power receiving coil is positioned.

7. A wireless power transmission system comprising:

the wireless power supply system according to claim 3; and

a moving body on which a power receiving coil is mounted, wherein

the electromagnetic shielding walls have a height that is higher than a height at which the power receiving coil is positioned.

8. A wireless power transmission system comprising:

the wireless power supply system according to claim 4; and

a moving body on which a power receiving coil is mounted, wherein

the electromagnetic shielding walls have a height that is higher than a height at which the power receiving coil is positioned.