The invention provides a three-phase LLC resonant converter with an ultra-wide voltage regulation range. The three-phase LLC resonant converter comprises a direct-current input voltage, seven power switch tubes, three resonant inductors, three resonant capacitors, three transformers, three equivalent excitation inductors of the transformers, twelve rectifier diodes and an output filter capacitor. The seven power switch tubes form a three-phase bridge inverter circuit; the three resonant inductors, the resonant capacitor and the excitation inductor form a three-phase resonant tank which are in triangular connection; and three secondary windings of the three transformers are respectively connected with three H-bridge rectifiers which are connected in series and are formed by twelve diodes, and then are connected with an output filter capacitor and a load in parallel. The three-phase LLC resonant converter has the beneficial effects that the three-phase LLC resonant converter has the advantages of high power, high efficiency, narrow working frequency range, ultra-wide output voltage range, ultra-small output current ripple, ultra-small standby loss power and the like, and is widely applied to electric vehicle charging piles and other charging power supplies needing high power and ultra-wide output voltage range.

    本专利提供一种具有超宽调压范围的三相LLC谐振变换器,包括直流输入电压、七个功率开关管、三个谐振电感、三个谐振电容、三个变压器及其三个等效励磁电感、十二个整流二极管和输出滤波电容;七个功率开关管构成三相桥式逆变电路;三个谐振电感、谐振电容和励磁电感构成三相谐振槽,采用三角形连接;三个变压器的三个副边绕组分别连接由十二个二极管构成的三个串联的H桥整流器,然后与输出滤波电容和负载并联。本专利的有益效果是:提供一种三相LLC谐振变换器,具有功率大、效率高、工作频率范围窄、输出电压范围超宽、输出电流纹波超小、待机损耗功率超小等优点,广泛应用于电动汽车充电桩等需要大功率、超宽输出电压范围的充电电源。


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    Title :

    Three-phase LLC resonant converter with ultra-wide voltage regulation range


    Additional title:

    具有超宽调压范围的三相LLC谐振变换器


    Contributors:
    YANG YUGANG (author) / SUN XIAOYU (author)

    Publication date :

    2023-06-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    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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