中文摘要：

该文阐述了直流升降压斩波电路的电路结构和工作原理,利用Multisim 12.0进行了电路的仿真,给出了电路的模型和仿真工作波形,通过仿真结果分析得出通过调节buck-boost电路和cuk电路的占空比可以将输入直流电压斩波变换为另一种电压值,且在multisim中对电路的仿真波形与一般分析方法具有一致性的结论,并可通过对仿真电路参数的调整得出不同的波形,为电路硬件设计提供了依据。

英文摘要：

The paper describes the DC-down chopper circuit structure and working principle, Use multisim 12.0 circuit simula-tion tool for simulation, Given the model and simulation waveforms of the circuit. The simulation results of the analysis conclusionthat the input DC voltage can be converted to a different values by adjust the duty cycle of the buck-boost circuit and cuk circuit,use the multisim tool for simulation and theoretical analysis method of the circuit have the same conclusion. After adjustment forthe simulation and circuit parameters can be different waveforms, This provides the basis for the circuit hardware design.