POWER TRANSMISSION DEVICE, POWER RECEPTION DEVICE, VEHICLE, AND NON CONTACT POWER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To perform impedance adjustment in a wider range thereby improving electric power transmission efficiency in a non contact power supply system.SOLUTION: A non contact power supply system 10 includes: a power transmission device 200 including a power transmission part 220; and a vehicle 100 including a power reception part 110 and transmits electric power from the power transmission device 200 to the vehicle 100 in a non contact manner. A power transmission ECU 240 controls the power transmission device 200, and a vehicle ECU 300 controls the vehicle 100. At least one of the power transmission part 220 and the power reception part 110 includes a coil and two variable capacitors. The one variable capacitor is serially connected with the coil, and the other variable capacitor is parallely connected with the coil. The power transmission ECU 240 and/or the vehicle ECU 300 adjusts the capacity of the two variable capacitors so that the power transmission efficiency becomes larger in an adjustable range while maintaining the combined capacity of the two variable capacitors.