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Wireless power transmission system, power transmitting device, and power receiving device

  • US 9,698,629 B2
  • Filed: 05/01/2013
  • Issued: 07/04/2017
  • Est. Priority Date: 12/24/2010
  • Status: Active Grant
First Claim
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1. A wireless power transmission system comprising:

  • a power transmitting device including;

    a transmitting-side electrode, anda voltage generating circuit configured to apply a voltage to the transmitting-side electrode; and

    a power receiving device including;

    a receiving-side electrode capacitively coupled to the transmitting-side electrode,a step-down circuit configured to decrease a voltage generated in the receiving-side electrode, anda load circuit configured to receive the decreased voltage from the step-down circuit,wherein at least one of the power transmitting device and the power receiving device further comprises an electrostatic shielding element configured to reduce stray capacitance formed between Earth and at least one of the transmitting-side electrode and the receiving-side electrode, respectively,wherein the transmitting-side electrode comprises a transmitting-side active electrode and a transmitting-side passive electrode having a lower potential than the transmitting-side active electrode, andwherein the receiving-side electrode comprises a receiving-side active electrode and a receiving-side passive electrode having a lower potential than the receiving-side active electrode.

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