Efficient Soft-Switching Snubber Cell Design for PWM DC-DC Boost Converters: Enhanced Load-Independent Performance

IF 1.6 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Circuit Theory and Applications Pub Date : 2025-01-19 DOI:10.1002/cta.4440

Yakup Sahin, Naim Suleyman Ting

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Abstract

Soft-switching (SS) boost converters are extensively utilized in applications such as renewable energy systems, electric vehicles, and high-efficiency power supplies, as they offer reduced switching losses and enhanced overall efficiency. Zero-voltage transition (ZVT) snubber cells that used SS operation perform poorly in zero-voltage switching (ZVS) turn-off at light load, although they perform well at heavy load. This study proposes a novel SS snubber cell for the PWM-DC boost converter, ensuring excellent ZVS turn-off performance under all load conditions. The main switch is turned off with ZVS at heavy and light load, so the turn-off performance is independent of the load conditions. In addition, the main switch is switched on with ZVT, and the main diode is switched with SS. The main and auxiliary semiconductor components do not expose additional voltage. In addition, the semiconductor switches are switched on with zero-current switching (ZCS) and switched off with ZVS, whereas the auxiliary diode is switched with SS. The theoretical analysis of the converter is presented, and an experimental study is conducted to demonstrate the analysis. The proposed converter is operated with an output power of 500 W and a switching frequency of 100 kHz.

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PWM DC-DC升压变换器的高效软开关缓冲单元设计：增强负载无关性能

软开关（SS）升压转换器广泛应用于可再生能源系统、电动汽车和高效电源等应用，因为它们可以降低开关损耗并提高整体效率。使用SS操作的零电压转换（ZVT）缓冲电池在轻负载下的零电压开关（ZVS）关断性能较差，尽管它们在重负载下表现良好。本研究提出了一种用于PWM-DC升压变换器的新型SS缓冲单元，确保在所有负载条件下都具有出色的ZVS关断性能。主开关在重负载和轻负载下均采用零电压关断，因此关断性能与负载条件无关。另外，主开关用ZVT导通，主二极管用SS导通。主和辅助半导体元件不暴露额外电压。此外，半导体开关采用零电流开关（ZCS）通断和零电流开关（ZVS）关断，辅助二极管采用SS开关。本文对变换器进行了理论分析，并进行了实验研究。该变换器的输出功率为500w，开关频率为100khz。

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来源期刊

International Journal of Circuit Theory and Applications 工程技术-工程：电子与电气

CiteScore

3.60

自引率

34.80%

发文量

277

审稿时长

4.5 months

期刊介绍： The scope of the Journal comprises all aspects of the theory and design of analog and digital circuits together with the application of the ideas and techniques of circuit theory in other fields of science and engineering. Examples of the areas covered include: Fundamental Circuit Theory together with its mathematical and computational aspects; Circuit modeling of devices; Synthesis and design of filters and active circuits; Neural networks; Nonlinear and chaotic circuits; Signal processing and VLSI; Distributed, switched and digital circuits; Power electronics; Solid state devices. Contributions to CAD and simulation are welcome.