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Elevator wireless power transfer system

  • US 10,135,299 B2
  • Filed: 08/23/2016
  • Issued: 11/20/2018
  • Est. Priority Date: 08/25/2015
  • Status: Active Grant
First Claim
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1. An elevator system, comprising:

  • an elevator car disposed in and arranged to move along a hoistway extending in an axial direction;

    a secondary resonant coil mounted to the elevator car and configured to get induced an electro-motive force and output a voltage or current;

    a plurality of primary resonant coils distributed along the hoistway and configured to transmit power to the secondary resonant coil when a primary resonant coil of the plurality of resonant coils is adjacent to the secondary resonant coil and is selectively energized;

    a control system configured to select and energize the plurality of primary resonant coils, the control system including a plurality of switches with each one of the plurality of switches being associated with a respective one of the plurality of primary resonant coils, and wherein the plurality of switches selectively close to energize a selected one of the plurality of primary resonant coils associated with a location of the elevator car; and

    a plurality of permanent magnets carried by the elevator car, and wherein the plurality of primary resonant coils are configured to sequentially propel the elevator car in the hoistway when proximate to the plurality of permanent magnets.

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