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High-efficiency low-cost AC/AC buck converter with stability analysis

机译:具有稳定性分析的高效低成本交流/交流降压转换器

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摘要

The commutation issue is the most important limiting factor of expanding AC chopper applications, which in most cases are solved by employing snubber circuits, implementing sensor-based selective switching patterns and utilising resonant circuits. To overcome the commutation problem, this study proposes a novel non-resonant AC/AC buck converter with no snubber circuits and no sensor-based switching patterns. The introduced hardware configuration and the proposed control strategy provide a path for an inductive load current in all switching states. This converter offers higher reliability and efficiency as well as lower cost compared to the AC choppers with snubber circuits or voltage and current sensors for performing a selective switching. This study presents the operation principles of the proposed hardware configuration and derives the stability condition thorough mathematical analyses. Moreover, the achievements are evaluated by simulation and verified by experiments.
机译:换向问题是扩展交流斩波器应用的最重要限制因素,在大多数情况下,可通过采用缓冲电路,实现基于传感器的选择性开关模式并利用谐振电路来解决这一问题。为了克服换向问题,本研究提出了一种新型的无谐振AC / AC降压转换器,它没有缓冲电路,也没有基于传感器的开关模式。引入的硬件配置和建议的控制策略为所有开关状态下的感性负载电流提供了一条路径。与带有缓冲电路或用于执行选择性切换的电压和电流传感器的交流斩波器相比,该转换器具有更高的可靠性和效率,并且成本更低。该研究提出了所提出的硬件配置的工作原理,并通过数学分析得出了稳定性条件。此外,通过仿真对成果进行评估,并通过实验进行验证。

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