一种三绕组耦合电感的交错高增益直流变换器

An Interleaved High-gain DC Converter With Three-winding Coupled Inductors

此处提出了一种基于交错结构控制的高增益直流变换器。通过将两个三绕组耦合电感与开关电容器单元进行集成,扩展了变换器的电压增益,用无源二极管-电容器组合电路吸收存储在漏感中的电磁能量,并将有源开关管的电压应力组合到远低于输出电压的值,使低压额定值的开关管能够得到有效选择。介绍了这种直流变换器的工作原理、稳态分析和性能设计,并与其他类似的变换器进行了比较,进一步验证了所提变换器的技术优势。最后,在STM32G474数字控制器的基础上搭载了一款400 W的小功率实验样机,证实了系统理论分析的科学性。

A high-gain DC converter based on interleaved structure control is proposed.The voltage gain of the con-verter is extended by integrating two three-winding coupled inductors with the switching capacitor unit.The passive diode-capacitor combined circuit absorbs the electromagnetic energy stored in the leakage induction and combines the voltage stress of the active switching tube to a value much lower than the output voltage,so that the low voltage rat-ed-value switching tube can be effectively selected.The operating principle,steady state analysis and performance de-sign of this DC converter are introduced,and the technical advantages of the proposed converter are further verified by comparison with other similar converters.Finally,on the basis of STM32G474 digital controller,a 400 W low-power experimental prototype is equipped,which confirms the scientific analysis of the system theory.