This application provides a wireless charging transmitting apparatus, a transmitting method, and a wireless charging system that are mainly used for electric vehicles. The apparatus includes: a DC-to-AC inverter circuit, for inverting a direct current output by a direct current power supply to an alternating current, where the DC-to-AC inverter circuit includes an advancing bridge arm and a lagging bridge arm, and in one period, a voltage phase of the advancing bridge arm precedes a voltage phase of the lagging bridge arm; a compensation circuit, for compensating the alternating current output by the DC-to-AC inverter circuit and sending the alternating current obtained after the compensation to a transmitting coil; the transmitting coil, for receiving the alternating current and generating an alternating current magnetic field; an impedance adjustment circuit, including at least one inductive branch, where each inductive branch includes an inductor and a switch that are connected in series, all inductive branches are connected in parallel to form an adjustment branch, a first end of the adjustment branch is connected to an output port of the direct current power supply, and a second end of the adjustment branch is connected to a midpoint of the lagging bridge arm; and a controller, configured to control on or off of the switch in the inductive branch to change a current flowing out of the lagging bridge arm, so that a controllable switching transistor of the lagging bridge arm implements zero-voltage switching.


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    Title :

    WIRELESS CHARGING TRANSMISSION APPARATUS, TRANSMISSION METHOD AND WIRELESS CHARGING SYSTEM


    Additional title:

    VORRICHTUNG ZUR DRAHTLOSEN LADUNGSÜBERTRAGUNG, ÜBERTRAGUNGSVERFAHREN UND DRAHTLOSES LADESYSTEM
    APPAREIL DE TRANSMISSION DE CHARGE SANS FIL, PROCÉDÉ DE TRANSMISSION ET SYSTÈME DE CHARGE SANS FIL


    Contributors:
    MAO YUNHE (author) / LIU YANDING (author)

    Publication date :

    2021-08-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen



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