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新颖的单相电压型准Z源逆变器

, PP. 33-41

Keywords: 准Z源,逆变器,电压型,单相,阻抗网络

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Abstract:

提出了一种电压型准Z源逆变器电路拓扑与控制策略,对构成这种逆变器的电路拓扑、具有阻抗网络储能电容电压前馈的输出电压瞬时值反馈单极性SPWM控制策略和稳态原理特性进行了深入的分析,获得了重要结论和关键电路参数的设计准则。这种电路拓扑是由大升压比阻抗网络、单相逆变桥和单相LC滤波器依序级联构成,其中大升压比阻抗网络是由储能电感L0和依序级联的2个相同的DLCC型二端口阻抗网络单元串联构成。理论分析和实验结果表明,这种逆变器具有电路拓扑简洁、升压比大、功率密度高,输出波形失真度低、可靠性高,输入电压配制灵活、成本低、应用前景广泛等优点。

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