交错并联三绕组耦合电感高增益Boost变换器

High step-up Boost converter with an interleaved and three-winding coupled inductor

针对光伏、燃料电池等新能源发电系统所需的高升压比的应用场景,提出一种交错并联三绕组耦合电感高增益Boost变换器。以交错并联的控制方式减小了耦合电感原边电流纹波,切分了占空比从而减少了各开关管导通时长,交错并联的开关管与输出开关管在电路结构上实现了电压钳位,不会出现电压尖峰。桥式倍压单元缓解了二极管反向恢复问题。交错并联耦合电感双原边的构造提高了变换器的工作可靠性。另外,基于该变换器还拓展出交错并联n+1绕组耦合电感高增益Boost变换器和n耦合电感交错并联n桥式倍压高增益Boost变换器。围绕所提变换器的工作原理及稳态性能进行了深入分析。且在理论分析的基础上通过实验平台制作了一台功率为500 W的样机验证了其准确性。

Given the high voltage transmission proportion required by photovoltaics,fuel cell and other new energy power generation systems,this paper introduces a high gain Boost converter with an interleaved and three-winding coupled inductor.The interleaved parallel control reduces the primary current ripple of the coupling inductor,cuts the duty cycle and thus reduces the on-time of each switch,and the interleaved parallel switches and output switches achieve voltage clamping in the circuit structure without voltage spikes.The bridge doubling unit alleviates the diode reverse recovery problem.The interleaved parallel coupled inductor dual primary configuration improves the operating reliability of the converter.Moreover,based on the proposed converter,a high gain Boost converter with interleaved and n+1-winding coupled inductor and a high gain Boost converter with n-coupled inductor interleaved n-bridge voltage doubler are developed.The working principle and steady state performance of the proposed converter are analyzed deeply.From the theoretical analysis,a 500 W model machine is made through the experimental platform to verify its correctness.