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Wireless power receiver for adjusting magnitude of wireless power

  • US 10,069,340 B2
  • Filed: 10/19/2012
  • Issued: 09/04/2018
  • Est. Priority Date: 10/19/2011
  • Status: Active Grant
First Claim
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1. A wireless power receiver that wirelessly receives power from a wireless power supplier, the wireless power receiver comprising:

  • a power receiver configured to receive the power wirelessly from the wireless power supplier, wherein the power receiver comprises a coil, a first capacitor connected to the coil in series and a second capacitor connected to the coil in parallel;

    a rectifier, connected to the power receiver, configured to rectify the received power;

    a switch configured to connect the rectifier to an output end; and

    a controller configured to;

    control the switch to disconnect the rectifier from the output end for a duration of a first time period such that the received power circulates in a closed loop composed of the coil, the first capacitor and the second capacitor,control the switch to connect the rectifier to the output end for delivering the rectified power to the output end without converting the rectifier power for a duration of a second time period, periodically,determine whether to increase or to decrease a magnitude of power to be delivered from the rectifier to the output end from a first non-zero value to a second non-zero value, andadjust the duration of the first time period and the duration of the second time period based on the determination result,wherein the magnitude of the power to be delivered from the rectifier to the output end is adjusted by changing a ratio of the duration of the first time period to the duration of the second time period.

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