Resonance matching circuit

A resonance matching circuit used in a power supply system that supplies electric power by an electric field coupling method, the resonance matching circuit comprising:

• an inverter circuit configured to perform as a voltage source;
• parallel transformer devices that are connected in parallel to the inverter circuit and transmit a current supplied from the inverter circuit;
• a timing adjustment circuit that is located between the inverter circuit and the parallel transformer devices and adjusts an input timing of a pulse current supplied by the inverter circuit;
• and
• an adjustment coil,
• wherein the timing adjustment circuit includes a series capacitive element connected in series to the inverter circuit,
• each of the parallel transformer devices includes a primary coil and a secondary coil, and
• the adjustment coil adjusts a resonance frequency of a first circuit including the series capacitive element and the primary coils in accordance with a resonance frequency of a second circuit including the secondary coils and a parallel capacitor parallel to the secondary coils.