Model of high-efficiency high-current coupled inductor two-phase buck converter

2017 40th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO) Pub Date : 2017-05-22 DOI:10.23919/MIPRO.2017.7973398

V. Valchev, Orlin P. Stanchev, G. Nikolov

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引用次数: 1

Abstract

This paper proposes a study and design considerations on a high-current high-efficiency two-phase buck converter with a coupled inductor. The converter operates close to the megahertz range. A specialized simulation model of the considered two-phase buck converter is proposed. The model allows an evaluation of current and voltage ripples at various duty cycles and inductor coupling factors. It can facilitate the design and tuning of such DC-DC converters. The model is implemented into a general-purpose simulation environment. The simulation results are presented and analyzed. The model is verified trough a dedicated experiment on a realized converter. Although coupled inductors increase the power converter efficiency, for high-current buck converter this effect is substantial at duty cycle bigger than 40 %. The advantages at lower duty cycle are related to the output voltage ripple and feedback response time. Design considerations are derived based on the analyzed simulation and experimental results of the investigated two-phase buck converter.

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高效大电流耦合电感两相降压变换器模型

本文提出了一种带耦合电感的大电流、高效率两相降压变换器的研究和设计思路。转换器的工作频率接近兆赫兹。提出了所考虑的两相降压变换器的专用仿真模型。该模型允许在各种占空比和电感耦合因素下评估电流和电压波动。它可以方便这种DC-DC变换器的设计和调谐。该模型在通用仿真环境中实现。给出了仿真结果并进行了分析。通过在已实现的变换器上的专用实验验证了该模型的正确性。虽然耦合电感提高了功率变换器的效率，但对于大电流降压变换器，在占空比大于40%时，这种效果是显著的。低占空比的优势与输出电压纹波和反馈响应时间有关。根据所研究的两相降压变换器的仿真分析和实验结果，得出了设计注意事项。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2017 40th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO)

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