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电网技术  2014 

耦合电感宽输入有源升降压逆变器

DOI: 10.13335/j.1000-3673.pst.2014.11.029, PP. 3134-3139

Keywords: 宽输入,耦合电感,恒定升压比,升降压逆变

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Abstract:

传统升压电路由于占空比的限制,升压能力有限,要使输出电压恒定,输入直流电压不能太低。提出了一种耦合电感宽输入有源升降压逆变器,分析了电路的工作模态、开关管应力和电路增益。通过设置耦合电感的匝比,在输入电压较低时,该电路可以实现较高幅值的交流电压输出;输入电压较高时可以实现降压逆变。适时修正耦合电感BoostAC/AC电路的占空比,可以使电路增益保持恒定。仿真和实验结果表明该电路能够在较宽的输入电压范围内实现升压和降压逆变。

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