Resonance-type non-contact power supply system

• US 9,484,149 B2
• Filed: 10/03/2013
• Issued: 11/01/2016
• Est. Priority Date: 04/22/2011
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Nakahara, Takahiro, Yanagida, You, Ngahu, Antony
• Primary Examiner(s): Gannon, Levi
• Application Number:
  US14/044,948
• Publication Number:
  US 20140042822A1
• Time in Patent Office: 1,125 Days
• Field of Search: 307/91, 307/104, 336/84.C, 336/84.R
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• 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: H01F 27/02 Casings
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H01F 27/366 made of 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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 resonance-type non-contact power supply system includes a power-transmission-side metal shield to cover an area around a primary coil and a primary resonance coil. A coaxial cable outer conductor of a power-transmission-side coaxial cable and the power-transmission-side metal shield are threadedly engaged using a coaxial male connector and a coaxial female connector.

Claims

1. A resonance-type non-contact power supply system which comprises a power-transmission-side resonance coil part and a power-receiving-side resonance coil part, and which transmits electric power by a non-contact resonance effect from the power-transmission-side resonance coil part to the power-receiving-side resonance coil part, the system further comprising:

a first coaxial cable which electrically connects a high frequency power supply and the power-transmission-side resonance coil, and

a power-transmission-side shield part which is a conductor and covers from outside to accommodate the power-transmission-side resonance coil part, and which is electrically connected to a housing of the high frequency power supply by an outer conductor of the first coaxial cable, wherein

a size of the power-transmission-side shield part is set so that an electromagnetic coupling of the power-transmission-side resonance coil part is not affected,

the power-transmission-side shield part accommodates the power-transmission-side resonance coil part not to protrude from the power-transmission-side shield part,

a first transmission opening is provided on a bottom of the power-transmission-side shield part and the outer conductor of the first coaxial cable is connected to an inner edge of the first transmission opening, and

the power-transmission-side shield part comprises a first cover body which has such a material and such a construction that an electromagnetic coupling of the power-receiving-side resonance coil part is not affected.

2. The resonance-type non-contact power supply system according to claim 1, further comprising:

a second coaxial cable which electrically connects the power-receiving-side resonance coil part and a load device, and

a power-receiving-side shield part which is a conductor and covers from outside to accommodate the power-receiving-side resonance coil part, and which is electrically connected to a housing of the load device by an outer conductor of the second coaxial cable, and wherein

a size of the power-receiving-side shield is set so that an electromagnetic coupling of the power-receiving-side resonance coil part is not affected,

the power-receiving-side shield part accommodates the power-receiving-side resonance coil part not to protrude from the power-receiving-side shield part, and

a second transmission opening is provided on a bottom of the power-receiving-side shield part and the outer conductor of the second coaxial cable is connected to an inner edge of the second transmission opening.

3. The resonance-type non-contact power supply system according to claim 2, wherein the power-receiving-side shield part comprises a second cover body which has such a material and such a construction that the electromagnetic coupling of the power-transmission-side resonance coil part is not affected.

4. A resonance-type non-contact power supply system which comprises a power-transmission-side resonance coil part and a power-receiving-side resonance coil part, and which transmits electric power by a non-contact resonance effect from the power-transmission-side resonance coil part to the power-receiving-side resonance coil part, the system further comprising:

a second coaxial cable which electrically connects the power-receiving-side resonance coil part and a load device; and

a power-receiving-side shield part which is a conductor and covers from outside to accommodate the power-receiving-side resonance coil part, and which is electrically connected to a housing of the load device by an outer conductor of the second coaxial cable, and wherein

a size of the power-receiving-side shield is set so that an electromagnetic coupling of the power-receiving-side resonance coil part is not affected,

the power-receiving-side shield part accommodates the power-receiving-side resonance coil part not to protrude from the power-receiving-side shield part,

a second transmission opening is provided on a bottom of the power-receiving-side shield part and the outer conductor of the second coaxial cable is connected to an inner edge of the second transmission opening, and

the power-receiving-side shield part comprises a second cover body which has such a material and such a construction that an electromagnetic coupling of the power-transmission-side resonance coil part is not affected.