METHOD AND ARRANGEMENT FOR WIRELESS ENERGY TRANSFER
First Claim
1. A transmitting arrangement (1) for wireless exchange of energy with a receiving arrangement (2), comprisinga transmitting array (11) comprising a plurality of transmitting coils (10), said array (11) being connected to a current source (12),a detector (13) arranged to detect said receiving arrangement (2),a control arrangement (14) connected to said current source (12) and to each transmitting coil (10), which control arrangement (14) is configured to control a current to each of said plurality of transmitting coils (10) to generate a joint current distribution for said transmitting arrangement (1), in response to a detected receiving arrangement (2),said plurality of transmitting coils (10) are configured to interact inductively with said receiving arrangement (2) to enable wireless exchange of energy between said transmitting arrangement (1) and said receiving arrangement (2).
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Accused Products
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.
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Citations
20 Claims
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1. A transmitting arrangement (1) for wireless exchange of energy with a receiving arrangement (2), comprising
a transmitting array (11) comprising a plurality of transmitting coils (10), said array (11) being connected to a current source (12), a detector (13) arranged to detect said receiving arrangement (2), a control arrangement (14) connected to said current source (12) and to each transmitting coil (10), which control arrangement (14) is configured to control a current to each of said plurality of transmitting coils (10) to generate a joint current distribution for said transmitting arrangement (1), in response to a detected receiving arrangement (2), said plurality of transmitting coils (10) are configured to interact inductively with said receiving arrangement (2) to enable wireless exchange of energy between said transmitting arrangement (1) and said receiving arrangement (2).
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19. A method for constructing a transmitting array that enables the generation of a multipole non-radiating current distribution, the method comprising the steps of:
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deciding S1 on the orders I, J of the multipole to be used; determining S2, the arrangement of a plurality of coils to be used in the transmitting array, said arrangement comprising the number of coils and the 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 of a multipole, I, J; constructing S3 a transmitting array for a transmitting arrangement based on the determined number of coils and the determined number and orientation of the windings of each of said coils.
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20. 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 S1 on the orders I, J of the multipole to be used; determining S20, the currents to be provided to each of the coils in a plurality of coils by based on information that relates the currents to be fed to each coil with the decided order of a multipole, I, J; distributing S30 the determined currents to each of the coils in the plurality of coils in the transmitting array.
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Specification