APPARATUS AND METHOD FOR WIRELESS ENERGY AND/OR DATA TRANSMISSION BETWEEN A SOURCE DEVICE AND AT LEAST ONE TARGET DEVICE

• US 20090085408A1
• Filed: 08/29/2008
• Published: 04/02/2009
• Est. Priority Date: 09/01/2007
• Status: Active Grant

• Current Assignee: Maquet GmbH & Company KG (Universal Robot Systems GmbH & Co KG)
• Original Assignee: Maquet GmbH & Company KG (Universal Robot Systems GmbH & Co KG)
• Inventors: Bruhn, Alfred
• Granted Patent: US 7,999,414 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H01F 2038/143 for signals
• 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 50/12 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

The invention relates to an apparatus and a method for wireless energy and/or data transmission between a source device and at least one target device, in which apparatus and method a voltage is induced by at least one primary coil (18), on the source-device side, of at least one primary circuit in at least one secondary coil (20), on the target-device side, of at least one secondary circuit and in at least one coil of at least one resonant circuit, the resonant circuit being arranged so as to be electrically isolated from the primary circuit and from the secondary circuit.

Claims

1. An apparatus for wireless energy and/or data transmission between a source device and at least one target device,

with at least one primary coil, on the source-device side, of at least one primary circuit,

with at least one secondary coil, on the target-device side, of at least one secondary circuit,

and with at least one resonator.

2. The apparatus according to claim 1, wherein the resonator has a resonant circuit, which is electrically isolated from the primary circuit and from the secondary circuit.

3. The apparatus according to claim 1, wherein the resonator has a resonant frequency which is different from the frequency of an energy source arranged in the primary circuit, with the resonant frequency preferably being twice or 0.5 times the frequency of the energy source.

4. The apparatus according to claim 1, wherein the primary coil, the secondary coil and an inductance of a resonant circuit of the resonator are arranged in the same magnetic circuit, with the primary coil, the secondary coil and a coil forming the inductance of the resonant circuit preferably being arranged around a magnet core forming the magnetic circuit.

5. The apparatus according to claim 1, wherein at least two resonators are provided, which resonators are each electrically isolated from the primary circuit and from the secondary circuit and from the respective other resonator, the resonators preferably each having a resonant circuit, and the inductances of the at least two resonant circuits preferably each being in the form of a coil, whose windings are formed as a bifilar winding.

6. The apparatus according to claim 5, wherein the at least two resonators have different resonant frequencies from one another.

7. The apparatus according to claim 5, wherein the at least two resonant circuits have coils with the same inductance, the windings of the coils preferably being formed as n-filar windings.

8. The apparatus according to claim 7, wherein the at least two resonant circuits have different capacitances from one another.

9. The apparatus according to claim 2, wherein the winding of the secondary coil and the winding of a coil forming the inductance of the resonant circuit are formed as a bifilar winding.

10. The apparatus according to claim 1, wherein a resonator is provided for each of the harmonic oscillations of a signal to be transmitted which has been analysed by Fourier transformation, the resonant frequency of said resonator corresponding to the frequency of the respective harmonic oscillation.

11. The apparatus according to claim 1, wherein an energy source arranged in the primary circuit generates a square-wave output voltage.

12. A method for wireless energy and/or data transmission between a source device and at least one target device,

in which a voltage is induced and at least one resonator is excited by at least one primary coil, on the source-device side, of at least one primary circuit in at least one secondary coil, on the target-device side, of at least one secondary circuit.

13. The method according to claim 12, wherein the resonator is formed by a resonant circuit with at least one coil and with at least one capacitance, the resonant circuit being arranged so as to be electrically isolated from the primary circuit and from the secondary circuit.

14. The method according to claim 13, wherein energy is supplied to the resonant circuit by the induced voltage, and this energy excites the resonant circuit, and

in that the excited resonant circuit generates a magnetic field which alternates with the resonant frequency of the resonant circuit and by means of which a voltage is induced in the secondary coil.