Preprint Article Version 1 This version is not peer-reviewed

A Single-Stage Asymmetrical Half-Bridge Flyback Converter with Resonant Operation

Version 1 : Received: 8 May 2018 / Approved: 9 May 2018 / Online: 9 May 2018 (07:43:25 CEST)

A peer-reviewed article of this Preprint also exists.

Ting, C.-Y.; Hsu, Y.-C.; Lin, J.-Y.; Chen, C.-P. A Single-Stage Asymmetrical Half-Bridge Flyback Converter with Resonant Operation. Energies 2018, 11, 1721. Ting, C.-Y.; Hsu, Y.-C.; Lin, J.-Y.; Chen, C.-P. A Single-Stage Asymmetrical Half-Bridge Flyback Converter with Resonant Operation. Energies 2018, 11, 1721.

Journal reference: Energies 2018, 11, 1721
DOI: 10.3390/en11071721

Abstract

This paper proposes a single-stage asymmetrical half-bridge fly-back (AHBF) converter with resonant mode using dual-mode control. The presented converter has an integrated boost converter and asymmetrical half-bridge fly-back converter and operates in resonant mode. The boost-cell always operates in discontinuous conduction mode (DCM) to achieve high power factor. The presented converter operates simultaneously using a variable-frequency-controller (VFC) and pulse-width-modulation (PWM) controller. Unlike the conventional single-stage design, the intermediate bus voltage of this controller can be regulated depending on the main power switch duty ratio. The asymmetrical half-bridge fly-back converter utilizes a variable switching frequency controller to achieve the output voltage regulation. The asymmetrical half-bridge fly-back converter can achieve zero-voltage-switching (ZVS) operation and significantly reduce the switching losses. Detailed analysis and design of this single-stage asymmetrical half-bridge fly-back converter with resonant mode is described. A wide AC input voltage ranging from 90 to 264 Vrms and output 19 V/ 120 W prototype converter was built to verify the theoretical analysis and performance of the presented converter.

Subject Areas

fly-back converter; zero-voltage-switching (ZVS); Variable-frequency-controller (VFC); single-stage

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