The invention discloses a primary side and secondary side phase synchronization method of a double-LCC type bidirectional wireless charging system, and belongs to the field of wireless charging of electric vehicles. The phase synchronization method comprises the steps of primary side and secondary side H bridge circuit control design, secondary side phase shift control to realize phase synchronization and the like. In order to solve the problems that the harmonic content of output current of a double-LCC type resonance compensation network is rich, and large deviation exists when phase synchronization is carried out through the phase relation of output voltage and current, the characteristic that an LC loop of the double-LCC topology is equivalent to a low-pass filter, and harmonic components cannot enter a transformer loop is utilized; primary and secondary side phase synchronization is realized through the relationship between the voltage amplitude at the two ends of the resonant capacitor C * f2 and the primary and secondary side phase angle, and the method does not need to consider the harmonic error influence and is simple and easy to operate.
本发明公开了一种双LCC型双向无线充电系统原副边相位同步方法,属于电动汽车无线充电领域。该相位同步方法包括原边侧和副边侧H桥电路控制设计、副边侧移相控制以实现相位同步等步骤。针对双LCC型谐振补偿网络输出电流谐波含量丰富,通过输出电压电流相位关系进行相位同步会存在较大偏差的问题,本发明利用双LCC拓扑其LC回路相当于低通滤波器,谐波分量无法进入变压器回路的特点,通过谐振电容C*f2两端电压幅值与原副边相位角的关系实现原副边相位同步,该方法无需考虑谐波误差影响,操作简单易行。
Primary side and secondary side phase synchronization method of double-LCC type bidirectional wireless charging system
一种双LCC型双向无线充电系统原副边相位同步方法
2024-08-02
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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