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Impedance Matching for Inductive Power Transfer Systems

  • US 20150244341A1
  • Filed: 02/23/2015
  • Published: 08/27/2015
  • Est. Priority Date: 02/23/2014
  • Status: Active Grant
First Claim
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1. An electromagnetic induction power transfer apparatus comprising:

  • an inductive power transmitter, comprising;

    a power supply with an active state and an inactive state, configured to switch between the active state and the inactive state at a selectable duty cycle; and

    a power-transmitting inductor coupled to the power supply; and

    an inductive power receiver, comprising;

    a power-receiving inductor, positioned inductively proximate the power-transmitting inductor;

    a programmable load; and

    an impedance controller coupled to the power receiving inductor and configured to increase or decrease an electrical impedance of the inductive power receiver in response to a change in a power requirement of the programmable load.

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