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.
WIRELESS CHARGING TRANSMISSION APPARATUS, TRANSMISSION METHOD AND WIRELESS CHARGING SYSTEM
VORRICHTUNG ZUR DRAHTLOSEN LADUNGSÜBERTRAGUNG, ÜBERTRAGUNGSVERFAHREN UND DRAHTLOSES LADESYSTEM
APPAREIL DE TRANSMISSION DE CHARGE SANS FIL, PROCÉDÉ DE TRANSMISSION ET SYSTÈME DE CHARGE SANS FIL
2021-08-11
Patent
Electronic Resource
English
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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