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Contactless power transmission device and power transfer system

  • US 10,110,064 B2
  • Filed: 05/12/2016
  • Issued: 10/23/2018
  • Est. Priority Date: 07/10/2015
  • Status: Active Grant
First Claim
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1. A contactless power transmission device, comprising:

  • a power transmission unit configured to transmit electric power to a power reception device in a contactless manner;

    a voltage-source inverter configured to supply transmission power in accordance with a drive frequency to the power transmission unit; and

    a control unit configured to control the inverter,the control unit executinga first control for controlling the transmission power to target power by adjusting a duty of an output voltage of the inverter, anda second control for controlling a turn-on current by adjusting the drive frequency, the turn-on current indicating an output current of the inverter at a rising of the output voltage,when a current supplied from the inverter to the power transmission unit exceeds a predetermined limit value during adjustment of the drive frequency by the second control, the control unit decreasing the target power in the first control.

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