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Inductively coupled ballast circuit

  • US 10,014,722 B2
  • Filed: 01/20/2017
  • Issued: 07/03/2018
  • Est. Priority Date: 06/21/1999
  • Status: Expired due to Fees
First Claim
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1. A wireless power transfer system for transferring power inductively to an electronic device, the wireless power transfer system comprising:

  • said electronic device separable from a wireless power supply, said electronic device and said wireless power supply capable of inductively coupling when in sufficient proximity to each other to transfer power inductively, said electronic device including;

    a load;

    a secondary configured to inductively receive power from the wireless power supply that is intended for the load; and

    said wireless power supply including;

    a primary circuit having a primary configured to inductively couple with said secondary of said electronic device to transfer power inductively to said electronic device;

    a sensor configured to generate a sensor output indicative of a characteristic of power sensed in said wireless power supply, said characteristic of power being affected by a characteristic of said load reflected through inductive coupling between said primary and said secondary;

    a control system operably coupled to said primary circuit and said sensor, said control system configured to control supply of power to said primary to affect an amount of power transferred to said secondary by varying an operational characteristic of power supplied to said primary;

    a wireless communication system operably coupled to said control system, said wireless communication system configured to receive information communicated from said electronic device, wherein said information is relevant to a supply of power to said load;

    wherein said control system is configured to obtain said information received from the electronic device and said sensor output, wherein said control system is configured to vary said operational characteristic of said power supplied to said primary based on said information and said sensor output indicative of said characteristic of power sensed by said sensor.

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