Wireless power supply system

• US 10,320,243 B2
• Filed: 07/13/2016
• Issued: 06/11/2019
• Est. Priority Date: 01/21/2014
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: Tokura, Susumu, Hara, Masakazu, Furiya, Kentaro
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Mourad, Rasem
• Application Number:
  US15/208,947
• Publication Number:
  US 20160318408A1
• Time in Patent Office: 1,063 Days
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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

Provided is a wireless power-supplying system equipped with a power-supplying coil disposed on the ground side, and a power-receiving coil that is mounted on a movable body and wirelessly receives power supplied from the power-supplying coil. In addition, the wireless power-supplying system is provided with a recovery coil in the vicinity of a space between the power-supplying coil and the power-receiving coil such that a wound face thereof intersects leakage flux occurring when the power is supplied from the power-supplying coil to the power-receiving coil.

Claims

1. A wireless power-supplying system comprising:

a power-supplying coil disposed on a ground side;

a power-receiving coil mounted on a movable body and configured to wirelessly receive power supplied from the power-supplying coil;

a plurality of recovery coils provided in the vicinity of a space between the power-supplying coil and the power-receiving coil such that at least one wound face thereof intersects leakage flux occurring when power is supplied from the power-supplying coil to the power-receiving coil; and

a moving mechanism for moving the plurality of the recovery coils,

wherein

the plurality of the recovery coils are provided in a height direction of the space,

an angle of a wound face varies according to a mounting height, and

at least one of the plurality of the recovery coils is connected to at least one load,

wherein;

the moving mechanism includes a support supporting the plurality of recovery coils and configured to be extendable and contractible;

the support is configured such that a plurality of posts that correspond to the plurality of recovery coils and air actuators provided between these posts are disposed and formed in a straight line shape; and

the support is configured to increase and reduce an interval between the recovery coils by the extension and contraction of these posts by actuating each of the air actuators.

2. The wireless power-supplying system according to claim 1 wherein a moving mechanism displaces the plurality of the recovery coils from a state in which the recovery coils lie above or on the ground or are retracted in the ground to a state in which the recovery coils stand up in the vicinity of the space.

3. The wireless power-supplying system according to claim 2, wherein:

the support is configured to stop the actuators of the support by touching a bottom portion of the movable body by a leading end of the support.

4. A leakage flux recovery unit comprising:

a power-supplying coil disposed on a ground side;

a power-receiving coil mounted on a movable body and configured to wirelessly receive power supplied from the power-supplying coil;

a plurality of recovery coils provided in the vicinity of a space between the power-supplying coil and the power-receiving coil such that a wound face thereof intersects leakage flux occurring when the power is supplied from the power-supplying coil to the power-receiving coil; and

a moving mechanism for moving the plurality of the recovery coils,

wherein

the plurality of the recovery coils are provided in a height direction of the space,

an angle of the wound face varies according to a mounting height, and

the at least one of the plurality of the recovery coils is connected to at least one load,

wherein;

the moving mechanism includes a support supporting the plurality of recovery coils and configured to be extendable and contractible;

the support is configured such that a plurality of posts that correspond to the plurality of recovery coils and air actuators provided between these posts are disposed and formed in a straight line shape; and

the support is configured to increase and reduce an interval between the recovery coils by the extension and contraction of these posts by actuating each of the air actuators.