The present invention provides a wireless charging transmission apparatus, a transmission method and a wireless charging system for an electric vehicle. The apparatus comprises: an inverter circuit (201) for inverting a direct current output by a direct-current power source into an alternating current, wherein the inverter circuit comprises a leading bridge arm and a lagging bridge arm, and the voltage phase of the leading bridge arm is ahead of the voltage phase of the lagging bridge arm in the same cycle; a compensation circuit (206) for compensating for the alternating current output by theinverter circuit and then sending same to a transmission coil; the transmission coil (202) for receiving the alternating current and generating an alternating magnetic field; an impedance adjustmentcircuit (203) comprising at least one inductive branch, wherein each inductive branch comprises an inductor (L) and a switch (K) connected in series, all inductive branches are connected to each otherin parallel to form an adjustment branch, a first end of the adjustment branch is connected to an output port of the direct-current power source, and a second end of the adjustment branch is connected to the midpoint of the lagging bridge arm; and a controller (204) for controlling the turning on or turning off of the switch in the inductive branch to change a current flowing out of the lagging bridge arm, such that controllable switching tubes (S1, S2) of the lagging bridge arm achieve zero voltage switching.
一种用于电动汽车的无线充电发射装置、发射方法及无线充电系统,装置包括:逆变电路(201),将直流电源输出的直流电逆变为交流电,逆变电路包括超前桥臂和滞后桥臂,其中同一个周期内超前桥臂的电压相位超前于滞后桥臂的电压相位;补偿电路(206),将逆变电路输出的交流电进行补偿后发送给发射线圈;发射线圈(202),接收交流电并产生交变磁场;阻抗调节电路(203)包括至少一个电感支路,每个电感支路包括串联连接的电感(L)和开关(K),所有电感支路相互并联后形成调节支路,调节支路的第一端连接直流电源的输出端口,调节支路的第二端连接滞后桥臂的中点;控制器(204),用于控制电感支路中开关的导通或关断来改变流出滞后桥臂的电流,使滞后桥臂的可控开关管(S1,S2)实现零电压开关。
WIRELESS CHARGING TRANSMISSION APPARATUS, TRANSMISSION METHOD AND WIRELESS CHARGING SYSTEM
无线充电发射装置、发射方法及无线充电系统
2021-01-12
Patent
Electronic Resource
Chinese
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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