Wireless power receiver
First Claim
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1. A wireless electrical power receiver for inductively generating alternating current power in a wireless electrical power transfer system having a transmission resonant frequency, the receiver comprising:
- a receiver resonator having a receiver resonant frequency, the receiver resonator constructed and arranged such that the receiver resonant frequency is detuned from the transmission resonant frequency;
a rectifier arranged to convert the alternating current power to a direct current power, for providing the direct current power to a load; and
a controller configured to selectively short circuit the receiver resonator, such that electrical current is retained in the receiver resonator when the receiver resonator is short circuited,wherein the controller is configured to activate the short circuit of the receiver resonator if an output voltage of the rectifier exceeds a first threshold, andwherein the controller is configured to deactivate the short circuit of the receiver resonator if a current in the receiver resonator exceeds second threshold.
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Abstract
A wireless electrical power receiver for inductively generating alternating current power in a wireless electrical power transfer system having a transmission resonant frequency, the receiver comprising a receiver resonator having a receiver resonant frequency, the receiver resonator constructed and arranged such that the receiver resonant frequency is detuned from the transmission resonant frequency.
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Citations
17 Claims
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1. A wireless electrical power receiver for inductively generating alternating current power in a wireless electrical power transfer system having a transmission resonant frequency, the receiver comprising:
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a receiver resonator having a receiver resonant frequency, the receiver resonator constructed and arranged such that the receiver resonant frequency is detuned from the transmission resonant frequency; a rectifier arranged to convert the alternating current power to a direct current power, for providing the direct current power to a load; and a controller configured to selectively short circuit the receiver resonator, such that electrical current is retained in the receiver resonator when the receiver resonator is short circuited, wherein the controller is configured to activate the short circuit of the receiver resonator if an output voltage of the rectifier exceeds a first threshold, and wherein the controller is configured to deactivate the short circuit of the receiver resonator if a current in the receiver resonator exceeds second threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless electrical power receiver for inductively generating alternating current power in a wireless electrical power transfer system having a transmission resonant frequency, the receiver comprising:
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a receiver resonator having a receiver resonant frequency, the receiver resonator constructed and arranged such that the receiver resonant frequency is detuned from the transmission resonant frequency; a rectifier arranged to convert the alternating current power to a direct current power, for providing the direct current power to a load; and a controller configured to selectively short circuit the receiver resonator, such that electrical current is retained in the receiver resonator when the receiver resonator is short circuited, wherein the controller is configured to activate or deactivate the short circuit to maintain the output voltage of the rectifier below a first limit and to maintain a power dissipation of the receiver below a second limit.
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14. A wireless electrical power receiver for inductively generating alternating current power in a wireless electrical power transfer system having a transmission resonant frequency, the receiver comprising:
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a receiver resonator having a receiver resonant frequency in tune with the transmission resonant frequency; a rectifier including a plurality of switches that are controlled to regulate an output voltage of the rectifier; and a rectifier capacitor connected across an output of the rectifier, wherein the receiver is configured to couple with a transmitter at a plurality of coupling factors, and wherein the switches in the receiver have a breakdown voltage that is higher than a maximum voltage that can appear at the output of the rectifier at any coupling factor. - View Dependent Claims (15, 16, 17)
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Specification