耦合多相升压变换器的开关模式分析

Ahmed K. Khamis, M. Agamy
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引用次数: 0

摘要

分占空比耦合多相型级联升压变换器,采用多相低压降压级,适合于双向工作,具有电流纹波小、磁分量尺寸小、效率高等优点。本文提出了对分占空比开关模式的增强,可以进一步降低每个降压相的纹波电流值,从而大大降低运行过程中的损耗,从而实现更高效的运行,适用于低压端口具有大电流的双向操作,需要多相降压级。本文介绍了采用耦合电感的分占空比与交流分占空比变换器的工作原理,其中在两种开关模式中所选择的磁性元件是相同的。仿真和实验结果验证了分析的正确性。
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Switching Pattern Analysis of Coupled Multi-phase Boost-Buck Converters
Split duty cycle coupled multi-phase variant of the cascaded boost-buck converter with multiphase low voltage buck stage, suitable for bidirectional operation provides benefits of low current ripple, small magnetic component size and high efficiency. This paper proposes an enhancement to split duty cycle switching pattern that would result in a further reduction in ripple current values in each buck phase, resulting in a much lower losses during operation and hence more efficient operation can be achieved, suitable for bidirectional operation where the low voltage port has high current, requiring a multi-phase buck stage. The paper covers split duty cycle vs. alternating split duty cycle converter operation principle using coupled inductors where the selected magnetic component used in both switching patterns is the same. Proposed analysis is validated by simulation and experimental results.
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