WIRELESS POWER TRANSFER SYSTEM FOR ZERO CURRENT SWITICHING OPERATION UNDER CHARGE-BLOCK OSCILLATION

The present disclosure relates to a field of wireless power transfer technology. The present disclosure relates to a wireless power transfer system for zero current switching (ZCS) operation under charge-blocking oscillation, comprising a power supply, a transmitter terminal, and a receiver terminal, the transmitter terminal having a resonance capacitor and a transmitter coil, the receiver terminal having a receiver coil. The transmitter terminal further comprises: an equivalent resistor, the equivalent resistor being connected in series with the transmitter coil and then in parallel with the resonance capacitor to form a charge-blocking oscillation circuit; a control switch, the control switch being connected with both terminals of the power supply after being connected in series with the charge-blocking oscillation circuit A self-oscillating is achieved by utilizing charge-blocking. By blocking the resonant cavity after charging, an energy is closed inside the closed-loop resonance circuit, and the energy will oscillate. Compared with a conventional self-oscillating wireless power transfer (WPT) based on a negative resistor, some improvements in the present disclosure have a fewer count of switching devices and do not require any additional circuit design, thus having a better cost and robustness.