System for transferring energy by electromagnetic coupling

• US 20140285016A1
• Filed: 10/03/2012
• Published: 09/25/2014
• Est. Priority Date: 10/03/2011
• Status: Active Grant

• Current Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Original Assignee: Commissariat a L'Energie Atomique (AES Corporation)
• Inventors: Bacquet, Sylvain, Thomas, Thierry, Tetu, Yann
• Granted Patent: US 9,768,645 B2
• Time in Patent Office: Days
• US Class Current: 307/31
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence

Abstract

The invention relates to a device (1) for emitting energy by electromagnetic coupling which comprises: a single generator (5) outputting an AC electric signal between two terminals; a series of resonant modules (2i) each including a capacitor and a first inductance, and first to fourth terminals (Ai, Bi, Ci, Di), the first (Ai) and second (Bi) terminals of a first module being connected to terminals of the generator, and the first (Ai) and second (Bi) terminals of the other module or modules being connected to the third (Ci) and fourth (Di) terminals of the module of the previous row.

Claims

1-15. -15. (canceled)

16. A system of power supply by electromagnetic coupling comprising:

a device for power transmission by electromagnetic coupling, comprising a single generator delivering an A.C. electric signal between two terminals; and

a succession of resonant modules, each comprising a first capacitor and a first inductance, and first, second, third, and fourth terminals, the first and second terminals of a first module being connected across the generator, and the first and second terminals of the other module(s) being connected to the third and fourth terminals of the module of previous rank; and

at least two receivers each comprising a resonant circuit comprising at least one capacitor and at least one inductance.

17. The system of claim 16, wherein, in the transmission device, two consecutive resonant modules are interconnected by a two-wire connection.

18. The system of claim 17, wherein, in the transmission device, said two-wire connection comprises a pair of adjoined wires.

19. The system of claim 17, wherein, in the transmission device, said connection comprises a twisted pair of wires.

20. The system of claim 16, wherein, in the transmission device, in each module, the first capacitor and the first inductance are series-connected between the first and third terminals, the second and fourth terminals being interconnected.

21. The system of claim 16, wherein, in the transmission device, in each module, the first capacitor and the first inductance are connected in parallel between the first and second terminals, the first and third terminals being interconnected, and the second and fourth terminals being interconnected.

22. The system of claim 16, wherein, in the transmission device, the successive modules are connected so that, in each module, the current flow direction in the inductance is different from the current flow direction in the inductance of the module of previous rank.

23. The system of claim 16, wherein, in each receiver, said resonant circuit is capable of providing electric power to a load, in the presence of an electromagnetic field emitted by the transmission device.

24. The system of claim 16, further comprising means for maintaining a predefined relative position between each receiver and the power transmission device, this position being selected according to the optimal coupling desired between the resonant circuit of the receiver and a resonant module of the power transmission device.

25. The system of claim 24, wherein said means comprise a wall in the shape of a hollow cylinder.

26. The system of claim 25, wherein said wall supports conductive windings forming the inductances of the resonant modules.

27. The system of claim 16, capable of recharging, by electromagnetic coupling, luminous ornaments.

28. The system of claim 16, wherein said power transmission device further comprises means for:

measuring the current or the output voltage of said generator;

deducing therefrom the number of receivers coupled to said device; and

accordingly adjusting the output characteristics of said generator, to maintain a constant power transfer towards the receivers, independently from the number of receivers.

29. A use of the device of claim 16, for simultaneously electrically powering at least two loads.