Pinless power coupling

• US 8,629,577 B2
• Filed: 01/28/2008
• Issued: 01/14/2014
• Est. Priority Date: 01/29/2007
• Status: Active Grant

• Current Assignee: Powermat Technologies, Ltd.
• Original Assignee: Powermat Technologies, Ltd.
• Inventors: Azancot, Yossi, Ben-Shalom, Amir, Greenwald, Oola, Rofe, Arik
• Primary Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US12/524,987
• Publication Number:
  US 20100181841A1
• Time in Patent Office: 2,178 Days
• Field of Search: 307/104
• US Class Current: 307/104
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2885 with shields or electrodes shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36
• 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 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A pin-less power coupling arrangement comprising at least one pin-less power jack; the power jack comprising a primary coil shielded behind an insulating layer for inductive coupling to a pin-less power plug; said power plug comprising a secondary coil wherein said insulating layer is substantially flat and said power plug and said power jack may be aligned by an alignment means. Various such alignment means are discussed as are enabled surfaces for supporting inductive power jacks and inductive plugs coupled to various appliances.

Claims

1. A pinless power coupling system comprising at least one unit selected from:

at least one pinless power jack, comprising at least one primary coil shielded behind an insulating layer said primary coil for inductively coupling with a secondary coil associated with a pinless power plug in front of said insulating layer, and

at least one pinless power plug comprising at least one secondary coil for inductive coupling with a primary coil shielded behind an insulating layer associated with a pinless power jack;

said pinless coupling system being characterized by an alignment mechanism for aligning said pinless power plug to said pinless power jack;

wherein said alignment mechanism maintains alignment between said power plug and said power jack through 360 degrees of rotation about a central axis.

2. The pinless power coupling system of claim 1, said alignment mechanism comprising an indicator being configured to provide a graduated indication of proximity to full alignment.

3. The pinless power coupling system of claim 1, said alignment mechanism comprising at least one indication selected from the group consisting of:

a translucent insulating layer through which said primary coil is visible;

a visible marking on outer surface of said insulating layer to indicate the location of a power jack there within to allow direct visual alignment;

an illuminated indicator configured to indicate when a plug is aligned to said power jack;

an illuminated indicator being selected from the group comprising LEDs, LED scales, LCD screens and combinations thereof;

an audio indicator configured to emit a sound when said plug is aligned to said power jack;

an audio indicator selected from at least one member of a group consisting of buzzers, bells, speakers, clappers and combinations thereof, and

a tactile indicator selected from at least one member of a group consisting of a sucker, a hook-and-loop arrangement, a ridge-and-groove arrangement, a magnetic element and combinations thereof.

4. The pinless power coupling system of claim 1, said alignment mechanism comprising at least one magnetic snag incorporated into said power jack configured to magnetically engage with at least one magnetic anchor carried by said power plug, wherein at least one of said magnetic snag and said magnetic anchor comprises a magnetic element characterized by at least one limitation selected from a group consisting of:

said magnetic element having rotational symmetry such that said magnetic anchor engages said magnetic snag at a plurality of angles;

said magnetic element having an annular configuration such that said magnetic anchor maintains engagements with said magnetic snag through at least 360 degrees of rotation, and

said magnetic element being selected from at least one of a group consisting of permanent magnets, electromagnets and ferromagnetic elements.

5. The pinless power coupling system of claim 1 wherein at least one of said primary coil and said secondary coil have a generally annular shape.

6. The pinless power coupling system of claim 5 wherein said annular shape encircles a central axis occupied by at least one of:

an optical transmitter, an optical receiver, a magnetic alignment element, an electromagnetic element and a ferromagnetic core.

7. The pinless power coupling system of claim 1 for providing power in the range of between 1 watt to 200 watts.

8. A pinless power coupling system comprising at least one unit selected from:

at least one pinless power jack, comprising at least one primary coil shielded behind an insulating layer said primary coil for inductively coupling with a secondary coil associated with a pinless power plug in front of said insulating layer, and

at least one pinless power plug comprising at least one secondary coil for inductive coupling with a primary coil shielded behind an insulating layer associated with a pinless power jack;

said pinless coupling system being characterized by an alignment mechanism for aligning said pinless power plug to said pinless power jack, said alignment mechanism comprising at least one magnetic snag incorporated into said power jack configured to magnetically engage with at least one magnetic anchor carried by said power plug,

wherein an electromagnet is incorporated into one or more element selected from the group consisting of;

said at least one magnetic snag; and

said at least one magnetic anchor.