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Wireless power feeding method and wireless power feeding device

  • US 10,069,339 B2
  • Filed: 05/11/2017
  • Issued: 09/04/2018
  • Est. Priority Date: 06/02/2016
  • Status: Active Grant
First Claim
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1. A wireless power feeding method for transferring power between a plurality of power transmitters and a plurality of power receptors, the method comprising:

  • causing each of the plurality of power transmitters to acquire power amounts for power received by one or more of the power receptors which are targets for power transmission;

    determining a first power amount which is the smallest out of the acquired power amounts;

    adjusting a power transmission direction to be a direction in which the power received by the power receptor which has received the first power amount is maximum;

    causing each of the plurality of power transmitters to transmit power in adjusted power transmission direction;

    acquiring leaked power amounts for leaked power, which is received by the power receptors that are the targets for power transmission of other power transmitters, as leaked power amounts to the power transmitters for which the targets for power transmission are the power receptors that receive the leaked power;

    causing the plurality of power transmitters to transmit power in the adjusted power transmission directions after the adjustment of the power transmission directions and acquisition of the leaked power amounts have been performed for all of the plurality of power transmitters; and

    in two power transmitters of the power transmitter transmitting leaked power and the power transmitter for which the target for power transmission is the power receptor which receives the leaked power, sequentially from the power transmitter with the largest leaked power amount, acquiring the power amounts for the power, which is received by the power receptors that are the target for power transmission of the two power transmitters, determining a second power amount which is the smallest from among acquired power amounts, and adjusting a phase of power transmission radio waves for either one of the two power transmitters to a phase in which the power received by the power receptor which has received the second power amount is maximum.

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