| CPC H02J 50/12 (2016.02) | 10 Claims |
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1. 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 receiver coil being coupled with the transmitter coil to produce a magnetic field coupling;
wherein 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, and the control switch being provided between a positive pole of the power supply and the charge-blocking oscillation circuit;
a side of the transmitter coil close to the control switch having a first voltage detection terminal, and a second voltage detection terminal being provided between the control switch and the power supply;
in response to determining that a voltage of the first voltage detection terminal reaches a predetermined maximum value, conducting the control switch; and
in response to determining that an energy of the second voltage detection terminal reaches a predetermined minimum value, disconnecting the control switch.
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