The present invention discloses a receive end and a transmit end of a wireless charging system, and a wireless charging system. The receive end includes a receive coil, a rectifier, and a receive end controller, where the receive coil receives an alternating magnetic field and outputs an alternating current; the rectifier is configured to rectify the alternating current from the receive coil into a direct current; the receive end controller is configured to adjust, based on a target impedance sent by a transmit end controller, a reflection impedance reflected from the receive end to a transmit end, so that an inverter of the transmit end implements zero voltage switching; and a bridge arm voltage is a voltage between two bridge arm midpoints of a full bridge rectifier or a voltage between a single bridge arm midpoint of a half bridge rectifier and ground. The reflection impedance reflected from the receive end to the transmit end is adjusted, to further adjust an equivalent output impedance of the inverter of the transmit end, so that a controllable switching transistor of the inverter implements zero voltage switching, and a reflection impedance required by the transmit end is used as the target impedance, so that the receive end adjusts an actual reflection impedance of the receive end based on the target impedance to meet a requirement of the transmit end.
RECEIVING END AND TRANSMITTING END OF WIRELESS CHARGING SYSTEM AND WIRELESS CHARGING SYSTEM
EMPFANGSENDE UND SENDEENDE EINES DRAHTLOSEN LADESYSTEMS UND DRAHTLOSES LADESYSTEM
EXTRÉMITÉ DE RÉCEPTION ET EXTRÉMITÉ D'ÉMISSION POUR SYSTÈME DE CHARGE SANS FIL ET SYSTÈME DE CHARGE SANS FIL
2022-12-28
Patent
Electronic Resource
English
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