Method and arrangement for wireless energy transfer
First Claim
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1. A transmitting arrangement for wireless exchange of energy with a receiving arrangement, the transmitting arrangement comprising:
- a transmitting array comprising a plurality of transmitting coils, said array being connected to a current source;
a detector configured to detect said receiving arrangement; and
a control arrangement connected to said current source and to each transmitting coil, the control arrangement being configured to control a current to each of said plurality of transmitting coils to generate a joint current distribution for said transmitting arrangement, in response to the detected receiving arrangement,wherein said plurality of transmitting coils is configured to generate a multipole non-radiating current distribution during inductive interaction with the detected receiving arrangement to enable a wireless exchange of energy between said transmitting arrangement and said receiving arrangement.
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Abstract
An arrangement, system and method are described which enhance efficiency, reduce the stray field of wireless power transfer, and make use of special coil geometries for transmitter and receiver. The coil geometry is an approximation of a multipole current. Such currents have a faster decaying electromagnetic field compared to traditional coils. This allows higher power densities to be transferred.
24 Citations
18 Claims
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1. A transmitting arrangement for wireless exchange of energy with a receiving arrangement, the transmitting arrangement comprising:
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a transmitting array comprising a plurality of transmitting coils, said array being connected to a current source; a detector configured to detect said receiving arrangement; and a control arrangement connected to said current source and to each transmitting coil, the control arrangement being configured to control a current to each of said plurality of transmitting coils to generate a joint current distribution for said transmitting arrangement, in response to the detected receiving arrangement, wherein said plurality of transmitting coils is configured to generate a multipole non-radiating current distribution during inductive interaction with the detected receiving arrangement to enable a wireless exchange of energy between said transmitting arrangement and said receiving arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for constructing a transmitting array that enables a generation of a multipole non-radiating current distribution, the method comprising the steps of:
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deciding on orders I, J of a multipole to be used, I, J being integers; determining an arrangement of a plurality of coils to be used in the transmitting array, said arrangement comprising a number of coils and a number and orientation of the windings to be provided on each of said coils based on information that relates the number and orientation of the windings to be provided on each of said coils with the decided order I, J of the multipole; and constructing the transmitting array for the transmitting arrangement based on the determined number of coils and the determined number and orientation of the windings of each of said coils to enable the generation of the multipole non-radiating current distribution.
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18. A method performed by a control arrangement that enables said control arrangement to distribute specific currents to different coils in a transmitter array in order to generate a non-radiation multipole current distribution, the method comprising the steps of:
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deciding on orders I, J of a multipole to be used, I, J being integers; determining currents to be provided to each of the coils in a plurality of coils based on information that relates the currents to be fed to each coil with the decided order I, J of the multipole; distributing the determined currents to each of the coils in the plurality of coils in the transmitting array in order to generate the non-radiation multipole current distribution.
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Specification