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Wireless power receiver

  • US 10,164,475 B2
  • Filed: 07/12/2016
  • Issued: 12/25/2018
  • Est. Priority Date: 07/13/2015
  • Status: Active Grant
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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