High efficient series resonant converter using direct power conversion

Abstract

This study proposes a high efficient series resonant ac-dc converter. The proposed series resonant converter has a structure integrated with an ac chopper. The proposed converter provides turn-on with zero-voltage switching of all switches and performs direct power conversion without several power conversion processes. Therefore the proposed converter can achieve high efficiency by minimising losses during ac-dc power conversion. In addition, it achieves high power factor without an additional circuit. The concept and operation principle of the converter are analysed and verified. A 300 W prototype is implemented to show the performance of the proposed converter.

Performance evaluation of high‐frequency CLL resonant DC–DC converter operated with phase‐shift and modified PWM gating scheme: analysis, design and implementation

“…However, these converters suffer from high switching losses due to hard switching. Hence, HF resonant DC-DC converters are used to reduce the switching losses, electromagnetic interference (EMI) and increase the power density and efficiency [1][2][3][4][5][6]. The basic two-element resonant DC-DC converter topologies are the series resonant converters (SRCs) and parallel resonant converters (PRCs).…”

“…The basic two-element resonant DC-DC converter topologies are the series resonant converters (SRCs) and parallel resonant converters (PRCs). The SRC provides good efficiency but the regulation of voltage at the light load is difficult and is not possible at no-load conditions [1][2][3][4][6][7][8]. However, PRC provides better voltage regulation but suffers from poor efficiency at light load [5][6][7][8][9].…”

A power decoupling control method for an isolated single‐phase AC‐to‐DC converter based on a high‐frequency cycloconverter

“…On the other hand, there are studies on isolated single‐phase AC‐DC converters using AC direct conversion . Though these systems based on direct conversion do not contain electrolytic capacitors or other energy storage elements, their applications are limited because power ripple caused by single‐phase current appears in high‐frequency output.…”

“…On the other hand, there are studies on isolated singlephase AC-DC converters using AC direct conversion. [4][5][6][7] Though these systems based on direct conversion do not contain electrolytic capacitors or other energy storage elements, their applications are limited because power ripple caused by single-phase current appears in high-frequency output. Particularly, when used in battery charging circuits, large-scale capacitors are needed to suppress ripple current flowing into batteries, which adds to system size.…”

A 1 MHz Half-Bridge Resonant DC/DC Converter Based on GaN FETs and Planar Magnetics

“…To achieve above goals, the operating frequency of the Switch-Mode Power Supplies (SMPS) must be increased. By a higher operating frequency, the value and volume of passive elements can be greatly decreased [4][5][6]. However, a higher operating frequency will lead to greater system losses, which are mainly composed of semiconductor devices' switching losses and magnetic elements' losses.…”