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Novel single-stage half-bridge series-resonant buck-boost inverter

机译:新型单级半桥串联谐振降压-升压逆变器

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A novel single-stage half-bridge series-resonant buck-boost inverter (HB-SRBBI) is proposed. The main attribute of the novel inverter topology is the fact that it generates an ac output voltage larger or lower than the dc input one, depending on the instantaneous duty cycle. This property is not found in the classical voltage source inverter (VST), which produces an ac output instantaneous voltage always lower than the dc input voltage. The proposed inverter circuit topology provides the main switch for turn-on at zero-current-switching (ZCS) by an auxiliary resonant cell built before the output choke. A state-space averaging approach is employed to analyze the system. A design example of 500 W ac/dc inverter is examined to assess the inverter performance and it provides high power efficiency above 90.7% under the rated power.
机译:提出了一种新颖的单级半桥串联谐振降压-升压逆变器(HB-SRBBI)。新型逆变器拓扑的主要特性是,根据瞬时占空比,它会产生大于或小于直流输入电压的交流输出电压。在传统的电压源逆变器(VST)中找不到该属性,该逆变器产生的交流输出瞬时电压始终低于直流输入电压。所提出的逆变器电路拓扑结构提供了一个主开关,用于通过在输出扼流圈之前建立的辅助谐振单元在零电流开关(ZCS)处导通。使用状态空间平均方法来分析系统。研究了一个500 W交流/直流逆变器的设计实例,以评估逆变器性能,并在额定功率下提供90.7%以上的高功率效率。

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