The invention provides a single-stage bidirectional AC/DC converter with a variable structure and a wide output range. The single-stage bidirectional AC/DC converter is formed by sequentially cascading m phases of AC filters (wherein m is equal to 1, 3, 5, 6, ...), m phases of cycloconverters, n primary side series high-frequency transformers, n high-frequency bidirectional full-bridge rectifiers with output filter capacitors and a structure selection module, wherein the secondary side of each transformer is connected with one high-frequency bidirectional full-bridge rectifier, and the output ends of the n full-bridge rectifiers are connected to the structure selection module. By adopting a double-loop control strategy with alternating current side power factor correction and direct current side current control performance, the converter can realize bidirectional power flow. The converter belongs to single-stage power conversion and does not have a direct current link, so the problems of short service life of a direct-current bus electrolytic capacitor and the like are solved, and the reliability of the converter is improved; and according to the converter, the series and parallel connection structures of the high-frequency bidirectional full-bridge rectifiers are changed through the structure selection module, so the stress of devices can be effectively reduced, and wide-range high-capacity output is realized.

    一种变结构宽输出范围的单级双向AC/DC变换器,是由m相交流滤波器(m=1,3,5,6,……)、m相周波变换器、n个原边串联高频变压器、n个带输出滤波电容的高频双向全桥整流器、结构选择模块依序级联构成,其中,每个变压器副边分别与一个高频双向全桥整流器连接,n个全桥整流器输出端连接到结构选择模块。采用带交流侧功率因数校正和直流侧电流控制的双环控制策略,变换器可实现双向功率流。该变换器属于单级功率变换,没有直流环节,解决了直流母线电解电容器寿命短等问题,提高了变换器的可靠性;所述变换器通过结构选择模块改变各高频双向全桥整流器的串、并联结构,可以有效减小器件应力,实现了宽范围大容量输出。


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    Titel :

    Single-stage bidirectional AC/DC converter with variable structure and wide output range


    Weitere Titelangaben:

    一种变结构宽输出范围的单级双向AC/DC变换器


    Beteiligte:
    JIANG JIAHUI (Autor:in) / ZHANG TAO (Autor:in) / MA DAZHUANG (Autor:in) / CHEN DAOLIAN (Autor:in) / SUN HAORAN (Autor:in)

    Erscheinungsdatum :

    13.08.2021


    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 / 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



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