一种耦合电感型准开关Boost变换器

A Quasi-switched Boost Converter with Coupled-inductor

将耦合电感和开关电容结构同时应用到准开关Boost变换器中,提出了一种新型的耦合电感型准开关Boost变换器。在开关占空比一定的范围内,该电路可以通过改变耦合电感匝数比的方式来提高变换器的电压增益能力。由于该拓扑中无源钳位电路结构的存在,耦合电感漏感的能量能够被输出端回收利用,有效降低了开关管电压尖峰,从而提高了变换器的效率。详细介绍了该变换器的工作原理并对稳态性能进行了分析,同时与其它三种相关变换器进行对比。最后,根据仿真结果搭建实验电路,验证了所提出变换器理论分析的正确性和可行性。

Applying the coupled inductor and switched capacitor structures to the quasi-switched Boost converter at the same time,a new type of coupled inductor quasi-switched Boost converter was proposed.Within a certain range of duty cycle,the circuit could improve the voltage gain capability of the converter by changing the turns ratio of the coupled inductor.Due to the existence of passive clamping circuit structure in this topology,the energy of the coupled inductor leakage inductance could be recycled at the output end,which could effectively reduce the voltage spike of the power switch,and improve the efficiency of the converter.The working principle of the converter was introduced in detail,and the steady-state performance was analyzed,and the converter was compared with other three related converters.Finally,the experimental circuit was constructed based on simulation results,which verifies the correctness and feasibility of the proposed converter theoretical analysis.