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A DCM High-Frequency High-Step-Up SEPIC-Based Converter With Extended ZVS Range by Shanshan Gao; Xikun Sang; Yijie Wang; Yining Liu; Yueshi Guan; Dianguo Xu is a Engineering article available to read on EtoBox.

What is A DCM High-Frequency High-Step-Up SEPIC-Based Converter With Extended ZVS Range about?

A discontinuous conduction mode (DCM) high frequency high step up SEPIC-based converter with extended ZVS range is presented in this paper. With the incorporation of some components on conventional SEPIC, the proposed converter achieves better performances such as high voltage gain, low voltage stress and zero voltage switching (ZVS). The additional components form a resonant cell which enables the switches to work in ZVS and switching loss is reduced accordingly. In order to achieve ZVS, the converter is designed to work in DCM. Due to inclusion of the resonance stage, traditional PWM or PFM control method is unable to regulate the output characteristics and maintain ZVS of the power switches at the same time. Therefore, a hybrid control method is proposed in this paper to guarantee ZVS within a specific load range. According to this hybrid control method, the ZVS range is extended effectively. GaN switches and planar magnetic components are also used. Working principles and steady-state analysis are presented in detail. A 1MHz 36W prototype with 10 voltage gain has been designed to demonstrate theoretical analysis. Efficiency obtained is up to 91.8% at full load. Experimental res

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Author

Shanshan Gao; Xikun Sang; Yijie Wang; Yining Liu; Yueshi Guan; Dianguo Xu

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Published

2022

Language

EN

Field

Engineering (Physical Sciences)