The invention provides a direct-current converter capable of outputting a wide voltage range. The direct-current converter comprises full-bridge conversion units, the two full-bridge conversion unitsare connected in parallel, the input ends of every two full-bridge conversion units are connected in parallel, the output ends of every two full-bridge conversion units are connected with capacitors in parallel to form a combined conversion module, and a switch unit is arranged between the output ends of each combined conversion module, wherein each switch unit comprises a series switch, a first parallel switch and a second parallel switch, the series switch is connected with the output end of each combined conversion module, and the first parallel switch and the second parallel switch are respectively positioned in a positive electrode output circuit and a negative electrode output circuit in the connecting circuit. Therefore, in the circuit topology, through the control method of the first mode and the second mode, the converter can work at the resonant frequency, and the electric energy conversion efficiency of the converter is improved. Through the control method of the third mode,the converter is enabled to have the capability of reaching a wider output voltage range, thereby facilitating the increase of the application occasions of a product, and improving the competitiveness.

    本发明提供一种输出宽电压范围的直流转换器,包括全桥转换单元,两个全桥转换单元并联,每两个全桥转换单元的输入端并联,输出端并联电容组成组合转换模块,每个组合转换模块的输出端之间设有开关单元;其中,开关单元包括串联开关、第一并联开关及第二并联开关,串联开关连接每个组合转换模块的输出端,第一并联开关和第二并联开关分别位于连接电路中的正极输出电路与负极输出电路。由此,在电路拓扑中,通过第一模式和第二模式的控制方法,使得变换器可以工作在谐振频率处,提升了变换器的电能转换效率。通过第三模式的控制方法,使变换器有能力达到更宽的输出电压范围,从而有利于增加产品的应用场合,提高竞争力。


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    Titel :

    Direct-current converter, conversion method with wide output voltage range and vehicle charger


    Weitere Titelangaben:

    直流转换器、输出电压范围宽的转换方法及车辆充电机


    Beteiligte:
    ZHENG SHAN (Autor:in) / YANG RUIGUO (Autor:in)

    Erscheinungsdatum :

    2020-05-22


    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




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