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APPARATUSES AND WIRELESS POWER TRANSMITTERS HAVING MULTIPLE TRANSMIT COILS AND RELATED METHOD

  • US 20160285278A1
  • Filed: 03/26/2015
  • Published: 09/29/2016
  • Est. Priority Date: 03/26/2015
  • Status: Active Grant
First Claim
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1. A wireless power enabled apparatus, comprising:

  • a wireless power transmitter, including;

    a plurality of transmit coils configured to generate a wireless power signal for wireless power transfer to a wireless power receiver;

    a bridge inverter configured to generate an AC signal to pass through the plurality of transmit coils; and

    a switching circuit operably coupled with the plurality of transmit coils and configured to enable and disable the transmit coils responsive to a control signal from a transmitter controller, wherein the switching circuit includes;

    a first plurality of switches serially coupled on opposing sides of a first transmit coil of the plurality of transmit coils;

    a first plurality of clamp elements, each clamp element coupled across a respective switch of the first plurality of switches and configured to extract energy away from the first transmit coil;

    a second plurality of switches serially coupled on opposing sides of a second transmit coil of the plurality of transmit coils; and

    a second plurality of clamp elements, each clamp element coupled across a respective switch of the second plurality of switches and configured to extract energy away from the second transmit coil.

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