A DAB (dual active bridge) type single-stage bidirectional AC/DC converter with low voltage stress and wide output range is formed by cascading an AC filter, a cycloconverter, n high-frequency transformers with primary sides connected in series, n full-bridge circuits, a DC filter and a variable structure switch group in sequence, wherein the secondary side of each transformer is connected with the full-bridge circuit through a leakage inductor, the output ends of the n full-bridge circuits are connected in series or in parallel through the variable structure switch group, and n groups of dual-active bridge structures are formed by the cycloconverter, the n high-frequency transformers and the n full-bridge circuits. The converter adopts a current outer-loop power inner-loop control strategy, can work in a rectification and inversion mode, and realizes the bidirectional AC/DC conversion and th eAC side power factor control. The converter adopts a DAB structure to reduce the switching voltage stress of the cycloconverter, belongs to the single-stage power conversion, does not have a direct current link, and improves the reliability of the converter; the n groups of dual-active bridge structures and the variable structure switch group improve the capacity of the converter, and the converter is suitable for high-power occasions.
一种低电压应力宽输出范围DAB(双有源桥)型单级双向AC/DC变换器,是由交流滤波器、周波变换器、n个原边串联的高频变压器、n个全桥电路、直流滤波器、变结构开关组依序级联构成;其中,每个变压器副边经漏感分别与一个全桥电路连接,n个全桥电路输出端由变结构开关组实现串联或并联,周波变换器、n个高频变压器和n个全桥电路组成n组双有源桥结构;变换器采用电流外环功率内环控制策略,可工作在整流和逆变模式,实现双向AC/DC变换和交流侧功率因数控制;该变换器采用DAB结构降低了周波变换器的开关电压应力,属于单级功率变换,没有直流环节,提高了变换器的可靠性;n组双有源桥结构和变结构开关组提高了变换器的容量,适用于大功率场合。
DAB type single-stage bidirectional AC/DC converter with low voltage stress and wide output range
一种低电压应力宽输出范围DAB型单级双向AC/DC变换器
2021-08-17
Patent
Electronic Resource
Chinese
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 |
Single-stage bidirectional AC/DC converter with variable structure and wide output range
European Patent Office | 2021
|European Patent Office | 2023
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