INDUCTIVE POWER PROVIDING SYSTEM HAVING MOVING OUTLETS

• US 20100244584A1
• Filed: 04/09/2010
• Published: 09/30/2010
• Est. Priority Date: 10/09/2007
• Status: Active Grant

• Current Assignee: Powermat Technologies, Ltd.
• Original Assignee: Powermat Ltd.
• Inventors: Greenwald, Oola, Ben-Shalom, Amir, Azancot, Yossi, Rofe, Arik
• Granted Patent: US 8,283,812 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 5/003 Printed circuit coils
• 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
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A power providing system includes at least one inductive power outlet configured to be movable behind an extended surface. The inductive power outlet includes a primary inductor configured to couple inductively with a secondary inductor wired to an electric load. The inductive power outlet is mounted upon a positioning mechanism upon which the primary inductor may be moved behind the extended surface.

Claims

1. A protection system for preventing an inductive power providing system from transmitting power in the absence of said electric load, said system comprising at least one primary inductor configured to transfer power to at least one secondary inductor, wherein said protection system further comprises at least one circuit-breaker for disconnecting said primary coil from said power supply.

2. The protection system of claim 1 further comprising:

at least one primary detector for detecting power transmitted by said primary inductor;

at least one secondary detector for detecting said secondary inductor inductively coupled to said primary inductor; and

at least one controller in communication with both said primary detector and said secondary detector, for triggering said circuit-breaker.

3. The protection system of claim 2, said primary detector being selected from a group consisting of:

magnetic sensors, heat sensors, electromagnetic radiation sensors and Hall probes.

4. The protection system of claim 2;

said primary inductor radiating at a characteristic frequency f and said primary detector being configured to detect radiation at frequency f.

5. The protection system of claim 4 additionally comprising a modulator for tagging said radiation with a secondary tag indicating that said secondary inductor is inductively coupled to said primary inductor, wherein said secondary detector comprises a processor for demodulating said radiation and isolating said secondary tag.

6. The system of claim 4 additionally comprising a modulator for tagging said radiation with a primary tag uniquely identifying said primary inductor.

7. The system of claim 5 additionally comprising a modulator for tagging said radiation with a primary tag uniquely identifying said primary inductor.

8. The power providing system of claim 1 wherein said primary inductor is located behind an extended surface.

9. The power providing system of claim 8 wherein said extended surface is selected from a group consisting of:

walls, floors, ceilings, sinks, baths, doors and work surfaces.

10. A method for preventing an inductive power outlet from transmitting power in the absence of an electric load, said inductive power outlet comprising at least one primary inductor wired to a power supply, for inductively coupling with a secondary inductor wired to said electric load, said method comprising:

transmitting power from said primary inductor;

detecting that said primary inductor is transmitting power;

checking that said primary inductor is inductively coupled to said secondary inductor; and

disconnecting said primary inductor from said power supply if no secondary inductor is detected.

11. The method of claim 10 wherein detecting includes at least one of:

communicating a signal from said primary inductor to a controller; and

detecting a radiation emanating from said primary inductor.

12. The method of claim 10 wherein checking includes at least one of:

communicating a signal from said secondary inductor to a controller;

encoding a secondary signal within radiation emanating from said primary inductor; and

monitoring the temperature in the vicinity of said primary inductor and checking for a significant rise in said temperature.

13. The method of claim 10 wherein disconnecting comprises sending at least one control signal to a controller indicating that said primary inductor is transmitting power with no secondary inductor present, and sending a trigger signal to a circuit-breaker connected between said power supply and said primary inductor.