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Non-contact power supply system

  • US 10,148,130 B2
  • Filed: 07/14/2016
  • Issued: 12/04/2018
  • Est. Priority Date: 03/29/2013
  • Status: Active Grant
First Claim
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1. A non-contact power supply system comprising:

  • a power transmission coil;

    a conversion circuit configured to convert power of a transmission side power source and output the power to the power transmission coil;

    a power transmission side controller configured to control the conversion circuit, the power transmission side controller being configured to transmit an encoded value by controlling the conversion circuit to output a current pulse to the power transmission coil;

    a power reception coil configured to supply power to an electrically connected load by receiving power from the power transmission coil in a non-contact manner by at least a magnetic coupling;

    a smoothing circuit configured to smooth the power that is received by the power reception coil;

    a sensor configured to detect one of a current that flows in the smoothing circuit and a voltage of the smoothing circuit; and

    a power reception side controller configured to receive information from the power transmission side controller by acquiring the encoded value based on a detection value of the sensor,the power reception side controller being configured to acquire the encoded value bymeasuring an elapsed time included between a point in time of a previous rise in the detection value of the sensor and a point in time of a current rise in the detection value, andcomparing the elapsed time and an elapsed time threshold that is set in advance.

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