SYSTEM AND METHOD FOR REGULATING INDUCTIVE POWER TRANSMISSION
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Accused Products
Abstract
An inductive power receiver provides a regulated power output to an electric load. The receiver inductively couples with an inductive power transmitter to form an inductive transfer system. A receiver-side regulator is provided to regulate the output voltage of the inductive transfer system. The regulator has a resonance-altering component and a switching unit configured to selectively connect the resonance-altering component to the reception circuit such that the amplitude of the induced voltage is controlled.
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Citations
38 Claims
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1-18. -18. (canceled)
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19. A method for regulating output voltage from a reception circuit of an inductive power transfer system, the method comprising the steps:
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step (a)—
driving a primary inductor at a transmission frequency different from a first resonant frequency of the inductive power transfer system;step (b)—
inducing a secondary voltage across a secondary inductor associated with the reception circuit;step (c)—
monitoring the output voltage from the reception circuit;step (d)—
comparing the output voltage with a first reference value; andstep (e)—
if the output voltage is less than the first reference value, connecting a resonance-altering component to the reception circuit such that the resonant frequency of the inductive power transfer system shifts closer to the transmission frequency. - View Dependent Claims (20, 21, 22)
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23-27. -27. (canceled)
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28. An inductive power receiver having a reception circuit configured to inductively couple with an inductive power transmitter to form an inductive transfer system characterized by a first resonance frequency, the reception circuit comprising:
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(a) at least one secondary inductor configured to inductively couple with a primary inductor associated with the inductive power transmitter; and (b) a regulator, configured to regulate an output voltage of the reception circuit, wherein the regulator comprises; (i) a comparator configured to compare the output voltage across with at least one reference value; (ii) at least one resonance-altering component; and (iii) at least one switching unit connected to the comparator and configured to selectively connect the resonance-altering component to the reception circuit based on a comparison between the output voltage and a first reference value; wherein the inductive power transmitter is configured to generate a driving voltage across the primary inductor at a transmission frequency that is significantly different from the first resonant frequency. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification