The invention discloses an isolation type bidirectional charger CLLC converter control device and method. The control method is applied to a bidirectional isolation type charger CLLC converter, and the synchronous rectification conduction time containing the switching frequency and the output load is calculated in a controller by establishing a three-order fitting model of forward and reverse working of the CLLC converter. The switching-on time of the CLLC primary side switching tube and the switching-on time of the CLLC secondary side switching tube are the same, and the switching-off time of the synchronous rectification tube is determined by the calculated synchronous rectification switching-on time. During forward operation, the CLLC converter adopts synchronous rectification control based on a third-order fitting model to realize low conduction loss and high efficiency; and during reverse operation, the CLLC converter adopts synchronous rectification control and input current feedforward control, so that the bus capacitor provides secondary power frequency power pulsation, the secondary ripple of battery current is remarkably reduced, and high efficiency is realized.

    本发明公开了一种隔离型双向充电机CLLC变换器控制装置及方法。该控制方法应用在双向隔离型充电机CLLC变换器当中,通过建立CLLC变换器正向和反向工作的三阶拟合模型,在控制器中计算包含开关频率和输出负载的同步整流导通时间。CLLC原边和副边开关管的开通时间是相同的,同步整流管的关断时间则由所计算的同步整流导通时间决定。正向运行时,CLLC变换器采用基于三阶拟合模型的同步整流控制,实现低导通损耗和高效率;反向运行时,CLLC变换器采用同步整流控制和输入电流前馈控制,使母线电容提供二次工频功率脉动,显著降低电池电流二次纹波,实现高效率。


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    Titel :

    Isolated bidirectional charger CLLC converter control device and method



    Erscheinungsdatum :

    2024-07-02


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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