中文摘要：

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Boost AC/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。

英文摘要：

Due to the restriction of duty cycle the boost capacity of traditional boost circuit is constrained,therefore to make the output voltage constant the input DC voltage cannot be too low.A wide input active boost-buck inverter with coupled inductors is proposed,and the operating mode of the circuit,the voltage stress of the valves and the gain of the circuit are analyzed.By means of setting the turn-ratio of the coupled inductors,the proposed circuit can output AC voltage with higher amplitude under lower input voltage;and the buck inversion can be implemented under higher input voltage.Modifying the duty ratio of the boost AC/AC circuit of the coupled inductors in time can make the gain of the circuit constant.Results of simulation and experiments show that using the proposed circuit the voltage boost and buck can be implemented within a wider input range of voltage range.