Induction power transfer system with coupling and reactance selection
First Claim
1. A power receiver configured to supply current to a load and to be wirelessly operatively coupled to a power transmitter, the power receiver comprising:
- a plurality of inductive elements configured to inductively generate current in response to a magnetic field generated by the power transmitter;
a coupling circuit operatively coupled to the plurality of inductive elements, the coupling circuit configured to be selectively switched among a plurality of coupling states, each coupling state of the plurality of coupling states having a corresponding set of inductive elements of the plurality of inductive elements configured to provide current to the load, the coupling circuit further configured to be selectively switched such that each inductive element of the set of inductive elements has a reactance state of a plurality of reactance states; and
a controller coupled to the coupling circuit and configured to select the coupling state from the plurality of coupling states and to select the reactance state of each inductive element of the set of inductive elements from the plurality of reactance states based on one or more signals indicative of one or more operating parameters of at least one of the power receiver or the power transmitter.
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Accused Products
Abstract
A power receiver is configured to supply current to a load and to be wirelessly operatively coupled to a power transmitter and includes a plurality of inductive elements. The power receiver further includes a circuit operatively coupled to the plurality of inductive elements and configured to be selectively switched among a plurality of coupling states. The circuit is further configured to be selectively switched such that each inductive element has a reactance state of a plurality of reactance states. The power receiver further includes a controller configured to select the coupling state and to select the reactance state of each inductive element based on one or more signals indicative of one or more operating parameters of at least one of the power receiver and the power transmitter.
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Citations
29 Claims
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1. A power receiver configured to supply current to a load and to be wirelessly operatively coupled to a power transmitter, the power receiver comprising:
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a plurality of inductive elements configured to inductively generate current in response to a magnetic field generated by the power transmitter; a coupling circuit operatively coupled to the plurality of inductive elements, the coupling circuit configured to be selectively switched among a plurality of coupling states, each coupling state of the plurality of coupling states having a corresponding set of inductive elements of the plurality of inductive elements configured to provide current to the load, the coupling circuit further configured to be selectively switched such that each inductive element of the set of inductive elements has a reactance state of a plurality of reactance states; and a controller coupled to the coupling circuit and configured to select the coupling state from the plurality of coupling states and to select the reactance state of each inductive element of the set of inductive elements from the plurality of reactance states based on one or more signals indicative of one or more operating parameters of at least one of the power receiver or the power transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for controlling a current supplied to a load by a power receiver wirelessly operatively coupled to a power transmitter, the power receiver comprising a plurality of inductive elements configured to inductively generate current in response to a magnetic field generated by the power transmitter, the method comprising:
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adjusting a coupling state of the power receiver based on one or more operating parameters of at least one of the power receiver or the power transmitter, the coupling state selected from a plurality of coupling states, each coupling state of the plurality of coupling states having a corresponding set of inductive elements of the plurality of inductive elements configured to provide current to the load; and adjusting a reactance state for each inductive element of the set of inductive elements based on the one or more operating parameters of at least one of the power receiver or the power transmitter, the reactance state selected from a plurality of reactance states. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A power receiver configured to supply current to a load and to be wirelessly operatively coupled to a power transmitter and, the power receiver comprising:
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means for inductively generating current in response to a magnetic field generated by the power transmitter; first means for selectively switching among a plurality of coupling states, each coupling state of the plurality of coupling states having a corresponding portion of the means for inductively generating current configured to provide current to the load; second means for selectively switching the means for inductively generating current among a plurality of reactance states; and means for controlling the first means for selectively switching and for controlling the second means for selectively switching based on one or more signals indicative of one or more operating parameters of at least one of the power receiver or the power transmitter. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification