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Analysis and implementation of high-gain non-isolated DC–DC boost converter

机译：高增益非隔离式DC-DC升压转换器的分析和实现

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摘要

High step-up DC-DC converters are increasingly required in many industrial applications. Conventional topologies operate at extreme duty cycle, high-semiconductor voltage stress, switching loss, and diode reverse recovery problems. This study presents a new non-isolated high gain, boost converter operating with a modest duty cycle by integrating a coupled inductor and switched capacitor technique. Importantly, the structure of the high-voltage side, together with the switched capacitor, reduces the voltage stress of the power switch to less than one third of the output voltage, which in turn helps to reduce the conduction loss by using a low on-resistance (R) switch. The diode voltage stress is less than the output voltage which facilitates faster recovery. Furthermore, the converter employs a passive clamp circuit to recycle the leakage energy. The main switch achieves zero current switching (ZCS) turn-on performance and all diodes achieve (ZCS) turn off reducing reverse recovery related losses. As a result, the circuit exhibits high efficiency performance; which is essential for most modern power electronic applications. In this study, the operational principle and performance characteristics of the proposed converter is presented and validated experimentally with a 250 W, 20V input voltage/190V output voltage prototype circuit.
机译：在许多工业应用中，越来越需要高升压DC-DC转换器。常规拓扑在极端占空比，高半导体电压应力，开关损耗和二极管反向恢复问题下运行。这项研究通过集成耦合电感器和开关电容器技术，提出了一种新型的非隔离式高增益，升压型转换器，其占空比适中。重要的是，高压侧的结构以及开关电容器将电源开关的电压应力降低到输出电压的三分之一以下，从而通过使用低导通电阻来帮助降低传导损耗。电阻（R）开关。二极管电压应力小于输出电压，这有助于更快地恢复。此外，该转换器采用无源钳位电路来回收泄漏能量。主开关实现零电流开关（ZCS）导通性能，所有二极管实现（ZCS）关断，从而减少了与反向恢复相关的损耗。结果，该电路表现出高效率性能。对于大多数现代电力电子应用而言，这是必不可少的。在这项研究中，提出了该转换器的工作原理和性能特征，并通过250 W，20V输入电压/ 190V输出电压原型电路进行了实验验证。

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