COIL DEVICE, WIRELESS POWER TRANSFER SYSTEM, AND AUXILIARY MAGNETIC MEMBER

• US 20170237291A1
• Filed: 05/02/2017
• Published: 08/17/2017
• Est. Priority Date: 11/07/2014
• Status: Active Grant

• Current Assignee: IHI Corporation
• Original Assignee: IHI Corporation
• Inventors: TOKURA, Susumu, HARA, Masakazu, FURIYA, Kentarou, ARAKI, Jun
• Granted Patent: US 10,673,276 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 5/00 Current collectors for power supply lines of electrically-propelled vehicles current collectors in general H01R41/00
• CPC Class Codes: B60L 50/60 using power supplied by batteries in combination with fuel cells B60L50/75
• CPC Class Codes: B60M 7/00 Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• CPC Class Codes: H01F 27/38 Auxiliary core members; Auxiliary coils or windings
• CPC Class Codes: H01F 3/14 Constrictions; Gaps, e.g. air-gaps in magnetic shunt paths H01F3/12
• CPC Class Codes: H01F 37/00 Fixed inductances not covered by group H01F17/00
• 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• 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

Provided is a first coil device that faces a second coil device in a facing direction, and wirelessly transmits or receives power, the first coil device including a first coil portion, and a first auxiliary magnetic member provided adjacent to the first coil portion in a first direction orthogonal to the facing direction. The first auxiliary magnetic member is configured to be closer to the second coil device with increasing distance in the first direction from the first coil portion.

Claims

1. A first coil device that faces a second coil device in a facing direction, and wirelessly transmits or receives power, the first coil device comprising:

a first coil portion; and

a first auxiliary magnetic member provided adjacent to the first coil portion in a first direction orthogonal to the facing direction,

wherein the first auxiliary magnetic member is configured to be closer to the second coil device with increasing distance in the first direction from the first coil portion.

2. The first coil device according to claim 1, wherein a space is provided between the first auxiliary magnetic member and the first coil portion.

3. The first coil device according to claim 1, wherein the first auxiliary magnetic member includes a plurality of divided magnetic members arranged side by side in the first direction.

4. The first coil device according to claim 3, wherein a gap is provided between the plurality of divided magnetic members.

5. The first coil device according to claim 1, wherein a facing surface of the first auxiliary magnetic member facing the second coil device extends along a circumference of a circle, a center of which is at an end portion of a second coil portion, passing through an end portion of the first coil portion when a position of the end portion of the first coil portion is matched with a position of the end portion of the second coil portion in the first direction.

6. The first coil device according to claim 1, wherein the first auxiliary magnetic member is provided adjacent to the first coil portion in a second direction orthogonal to each of the facing direction and the first direction.

7. The first coil device according to claim 1, wherein the first auxiliary magnetic member is configured such that a slope of the facing surface thereof facing the second coil device is adjustable.

8. A wireless power transfer system comprising:

the first coil device according to claim 1; and

the second coil device that faces the first coil device to wirelessly transmits or receives power to and from the first coil device,

wherein the second coil device includes

a second coil portion, and

a second auxiliary magnetic member provided adjacent to the second coil portion in the first direction, and

the second auxiliary magnetic member is configured to be closer to the first coil device with increasing distance in the first direction from the second coil portion.

9. An auxiliary magnetic member provided, among a first coil device and a second coil device, at least in the first coil device for performing wireless power transfer,

the auxiliary magnetic member being provided adjacent to a coil portion of the first coil device in a first direction orthogonal to a facing direction in which the first coil device faces the second coil device, and configured to be closer to the second coil device with increasing distance in the first direction from the coil portion.