Wireless power supply system and wireless power transmission system

Patent metadata

Field	Value
Publication number	US-10272789-B2
Application number	US-201515304817-A
Country	US
Kind code	B2
Filing date	May 14, 2015
Priority date	May 19, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

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.

First claim

The invention claimed is:

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.

Assignees

• Tdk Corp

Inventors

• Chiyo Noritaka
• Terasaki Yasuhiro
• Suzuki Mitsunari

Classifications

• B60M1/36

  Single contact pieces along the line for power supply · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• B60M7/003

  for vehicles using stored power (e.g. charging stations) · CPC title

• Y02T90/14

  Plug-in electric vehicles · CPC title

• B60L53/122

  Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil · CPC title