Journal ArticleDOI
ZVS Resonant Converter With Series-Connected Transformers
Bor-Ren Lin,Shin-Feng Wu +1 more
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TLDR
The proposed series-resonant converter with series-connected transformers can be applied for the power supply unit of all-in-one PCs, liquid crystal display (LCD) TVs and servers, and dc-dc converters for fuel-cell power system.Abstract:
This paper presents a new series-resonant converter with series-connected transformers in order to realize zero voltage switching (ZVS) for power switches, zero current switching (ZCS) for rectifier diodes at full load, less transformer secondary winding with a full-wave rectifier, and load current sharing. Two series-resonant converters using the same switches are operated with interleaved half switching cycle. The secondary windings of transformers are connected in series in order to ensure that the primary side currents are balanced to share load current. Thus, the sizes of the transformer core and bobbin are reduced. The full-wave diode rectifier is adopted on the output side such that the voltage stress of the rectifier diodes is equal to the output voltage, rather than being two times the output voltage as in a conventional center-tapped rectifier topology. Based on the resonant behavior, all switches are turned on at ZVS, and rectifier diodes are turned off at ZCS if the switching frequency is less than the series resonant frequency. The proposed converter can be applied for the power supply unit of all-in-one PCs, liquid crystal display (LCD) TVs and servers, and dc-dc converters for fuel-cell power system. Laboratory experiments with a 1000-W prototype, verifying the effectiveness of the proposed converter, are described.read more
Citations
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Journal ArticleDOI
Automated Design of a High-Power High-Frequency LCC Resonant Converter for Electrostatic Precipitators
TL;DR: This work presents an automated design procedure for series parallel resonant converters employed in electrostatic precipitator (ESP) power supplies, which reduces the designer effort significantly.
Journal ArticleDOI
On/Off Control of Boost PFC Converters to Improve Light-Load Efficiency in Paralleled Power Supply Units for Servers
TL;DR: An on/off control of boost power factor correction (PFC) converters to improve the light-load efficiency in paralleled power supply units (PSUs) for servers by reducing load-independent losses such as capacitive turn-on and core losses.
Journal ArticleDOI
Variable Delay Time Method in the Phase-Shifted Full-Bridge Converter for Reduced Power Consumption Under Light Load Conditions
TL;DR: In this article, a variable delay time of lagging-leg switches under light load conditions was proposed to reduce the voltage stress of synchronous rectifier switches, and the switching loss was reduced.
Journal ArticleDOI
Resonant power converters with respect to passive storage (LC) elements and control techniques – An overview
TL;DR: The principles of resonant power converters (RPCs) and their classifications based on their DC-DC converter family, and ability to achieve soft switching are presented.
Journal ArticleDOI
A Wide Output Range HB-2LLC Resonant Converter With Hybrid Rectifier for PEV Battery Charging
TL;DR: In this paper, the authors proposed an HB-2LLC resonant converter with hybrid rectifier to realize wide output voltage control range (100-420 V) for plug-in electric vehicle (PEV), on-board battery charging.
References
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Journal ArticleDOI
A comparison of half-bridge resonant converter topologies
TL;DR: In this paper, the half-bridge series-resonant, parallel-reonant and combination series-parallel resonant converters are compared for low-output-voltage power supply applications.
Proceedings ArticleDOI
LLC resonant converter for front end DC/DC conversion
TL;DR: In this article, a LLC resonant converter is proposed for front end DC/DC conversion in a distributed power system, which utilizes leakage and magnetizing inductance of a transformer.
Proceedings ArticleDOI
A comparison of half-bridge resonant converter topologies
TL;DR: In this paper, the half-bridge series resonant, parallel resonant and combination series-parallel resonant converters are compared for use in low output voltage power supply applications, and it is shown that the combination seriesparallel converter, which takes on the desirable characteristics of the pure series and the pure parallel converters, removes the main disadvantages of those two converters.
Journal ArticleDOI
A Novel Driving Scheme for Synchronous Rectifiers in LLC Resonant Converters
TL;DR: In this paper, a synchronous rectifier (SR) driving scheme was proposed for dc-dc resonant converters with SRs, which can achieve low stress, high efficiency, and high power density.
Journal ArticleDOI
Three-level LLC series resonant DC/DC converter
TL;DR: In this article, a three-level soft switching LLC series resonant dc/dc converter is presented, which achieves zero-voltage switching (ZVS) for each main switch without any auxiliary circuit.
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