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POWER TRANSMITTER, RESONANCE-TYPE CONTACTLESS POWER SUPPLY AND CONTROL METHOD THEREFOR

  • US 20160285315A1
  • Filed: 03/25/2016
  • Published: 09/29/2016
  • Est. Priority Date: 03/27/2015
  • Status: Active Grant
First Claim
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1. A resonance-type contactless power supply comprising:

  • an inverter circuit configured to receive electric energy and to generate a first AC current with a voltage strength parameter responding to an inverter control signal;

    an impedance conversion network configured to receive said first AC current and to generate a second AC current with a current strength parameter corresponding to a voltage strength parameter of said first AC current;

    a transmitter-side resonant circuit comprising a transmitting coil for receiving said second AC current;

    a receiver-side resonant circuit comprising a receiving coil which is separated from but electrically coupled to said transmitting coil in a contactless manner, and configured to receive electric energy from said transmitting coil and to generate a third AC current; and

    a control circuit configured to generate said inverter control signal for maintaining said current strength parameter of said second AC current to be m times of a current strength parameter of said third AC current, wherein m is a square root of a ratio of an equivalent resistance of said receiving coil to an equivalent resistance of said transmitting coil, said voltage strength parameter is a voltage peak or an effective value, and said current strength parameter is a current peak or an effective value.

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