Coil for non-contact power transmission system and non-contact power transmission system

• US 10,014,106 B2
• Filed: 07/29/2015
• Issued: 07/03/2018
• Est. Priority Date: 01/30/2013
• Status: Active Grant

• Current Assignee: Panasonic Automotive Systems Company of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Fujita, Atsushi, Sadakata, Hideki, Omori, Yoshiharu, Kurihara, Hiroaki, Bessyo, Daisuke
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Mourad, Rasem
• Application Number:
  US14/813,055
• Publication Number:
  US 20150332849A1
• Time in Patent Office: 1,070 Days
• Field of Search: 307104
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/346 Preventing or reducing leakage fields using magnetic shields H01F27/36; using auxiliary windings H01F27/38
• CPC Class Codes: H01F 27/38 Auxiliary core members; Auxiliary coils or windings
• 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 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A coil for a non-contact power transmission system according to the present disclosure is used in a non-contact power transmission system to transmit electric power via a non-contact method. The coil includes a first coil in which a wire is wound around at a center of a core; and a second coil placed at an end of the core, and wound with the wire. Winding axes of the first and second coils are oriented in different directions.

Claims

1. A coil for use in a non-contact power transmission system transmitting electric power via a non-contact method, the coil comprising:

a first coil in which a wire is wound around at a center of a core, and

a second coil placed at an end of the core wound with the wire, wherein

winding axes of the first and second coils are oriented in different directions, and

in the second coil, the wire is wound in a swirl pattern in a plan view and disposed on an end portion of an upper surface of the core, the winding axis of the second coil extending upward from the upper surface of the core,

wherein the core does not extend into a center of the swirl pattern formed by the second coil along the winding axis of the second coil.

2. The coil for the non-contact power transmission system of claim 1, wherein the winding axis of the second coil is perpendicular to the winding axis of the first coil.

3. A non-contact power transmission system comprising:

a power supplier including a power transmitting coil; and

a power receiver including a power receiving coil, wherein

each of the power transmitting and receiving coils include the structure as recited in claim 1, and

the power transmitting and receiving coils are arranged with the respective second coils facing each other.

4. The coil for the non-contact power transmission system of claim 1, wherein the upper surface of the core is a planar surface, and the core has a rectangular shape when viewed in cross-section.