Abstract
In this paper, a QR flyback converter using a self-driven active snubber (SDAS) was proposed to solve the problem of voltage surge in the switch of QR flyback converters. In the proposed converter, the SDAS consisting of a clamping capacitor and an active switch can be configured in parallel with the main switch or transformer to reduce the voltage surge in the switch. To confirm the steady-state characteristics of the QR flyback converter to which the proposed SDAS is applied, equivalent circuits for each state were constructed, and the equations and characteristics for each state were determined. A 60 W class small AC–DC adapter was constructed to confirm the effectiveness of the proposed converter and the control circuit method, and the experimental results were analyzed. The size of the experimental AC–DC adapter was 74×29×23 mm, and it had a high power density of 20 W/in3 or more. The experimental circuit was limited to the high power conversion efficiency of up to 91.56%, and the maximum voltage surge in the switch was approximately 450 V. One of the reasons for such high efficiency is the SDAS circuit, which sufficiently reduces the voltage surge of the QR flyback switch, compared with the RCD clamp circuit, and does not consume power in principle.
Funder
Technological Innovation R&D Program
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference43 articles.
1. Design Methodology of Quasi-Resonant Flyback Converter with a Divided Resonant Capacitor;Park;IEEE Trans. Ind. Electron.,2020
2. A Single-Switched High-Switching-Frequency Quasi-Resonant Flyback Converter;Wang;IEEE Trans. Power Electron.,2018
3. Baek, J.-O. (2018). A Study on New Active Clamp Circuit and Control Method for High Efficiency Quasi Resonant Flyback Converter. [Ph.D. Thesis, Cheongju University, Graduate School of Cheongju University].
4. The Novel Quasi-Resonant Flyback Converter with Autoregulated Structure for Parallel/Serial Input;Wang;IEEE Trans. Ind. Electron.,2019
5. Mauromicale, G., Raciti, A., Rizzo, S.A., Susinni, G., Fusillo, F., Palermo, A., Scrimizzi, F., and Scollo, R. (October, January 29). Si and GaN Devices in Quasi Resonant Flyback converters for Wall Charger Applications. Proceedings of the 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献