Analysis of Non-isolated Soft Switching DC-DC Buck Converter

2008 IEEE Region 10 and the Third international Conference on Industrial and Information Systems Pub Date : 2008-12-01 DOI:10.1109/ICIINFS.2008.4798425

S. Pattnaik, A. Panda, K. Mahapatra

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引用次数: 4

Abstract

A novel zero-voltage switching (ZVS) step-down converter with a tapped inductor is proposed in this paper. Tapped inductor provides better power density as compared to isolation buck converter. With a simple structure, the tapped-inductor buck converter shows promise for extending the duty cycle. This converter is cost effective and attractive for high performance. Furthermore, with the replacement of transformer by tapped inductor, its efficiency may be maximized for low power application and power quality is improved as low harmonics at input as well as output. The peak current of the main switch is reduced by tapped inductor operation, thus the conduction loss and switching loss levels of the main switch are lowered. Consequently, this tapped inductor scheme alleviates the severe power stress and enhances device utilization. This soft-switching buck converter is suitable for extremely low step-down ratio applications. The principle of the proposed scheme, analysis of the operation, and design guidelines are included. Finally, the experimental result of the 10 W prototype DC/DC converter is given for hardware verification.

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非隔离软开关DC-DC降压变换器分析

提出了一种新型的带抽头电感的零电压开关降压变换器。抽头电感比隔离降压变换器提供更好的功率密度。抽头电感降压变换器结构简单，有望延长占空比。这种转换器具有成本效益和高性能的吸引力。此外，用抽头电感代替变压器，可以在低功率应用中最大限度地提高其效率，并且由于输入和输出的低谐波而改善了电能质量。抽头电感工作降低了主开关的峰值电流，从而降低了主开关的导通损耗和开关损耗水平。因此，这种抽头电感方案减轻了严重的功率压力，提高了器件利用率。这种软开关降压变换器适用于极低降压比的应用。提出了方案的原理、运行分析和设计指南。最后给出了10w原型DC/DC变换器的实验结果进行硬件验证。

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2008 IEEE Region 10 and the Third international Conference on Industrial and Information Systems

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