Steady-State Analysis of the Series Resonant Converter

LLC resonant converter for front end DC/DC conversion

This paper appears in: Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE

Issue Date: 2002

On page(s): 1108 - 1112 vol.2

Meeting Date: 10 мар 2002 - 14 мар 2002

Location: Dallas, TX, USA

Print ISBN: 0-7803-7404-5

Cited by: 58

INSPEC Accession Number: 7220823

Digital Object Identifier: 10.1109/APEC.2002.989382

Date of Current Version: 07 Август 2002

Abstract

A new LLC resonant converter is proposed for front end DC/DC conversion in a distributed power system. Three advantages are achieved with this resonant converter. First, ZVS turn on and low turn off current of MOSFETs are achieved. The switching loss is reduced so we can operate the converter at higher switching frequency. The second advantage is that with this topology, we can optimize the converter at high input voltage. Finally, with this topology, we can eliminate the secondary filter inductor, so the voltage stress on the secondary rectifier will be limited to two times the output voltage, better rectifier diodes can be used and secondary conduction loss can be reduced. The converter utilizes leakage and magnetizing inductance of a transformer. With magnetic integration concept, all the magnetic components can be built in one magnetic core. The operation and characteristic of this converter is introduced and efficiency comparison between this converter and a conventional PWM converter is given which shows a great improvement by using this topology

A comparison of half-bridge resonant converter topologies

This paper appears in: Power Electronics, IEEE Transactions on

Issue Date: Apr 1988

Volume: 3 Issue:2

On page(s): 174 - 182

ISSN: 0885-8993

Cited by: 201

INSPEC Accession Number: 3193047

Digital Object Identifier: 10.1109/63.4347

Date of Current Version: 06 Август 2002

Sponsored by: IEEE Power Electronics Society

Abstract

The half-bridge series-resonant, parallel-resonant, and combination series-parallel resonant converters are compared for use in low-output-voltage power supply applications. It is shown that the combination series-parallel converter, which takes on the desirable characteristics of the pure series and the pure parallel converter, avoids the main disadvantages of each of them. Analyses and breadboard results show that the combination converter can run over a large input voltage range and a large load range (no load to full load) while maintaining excellent efficiency. A useful analysis technique based on classical AC complex analysis is introduced

Steady-State Analysis of the Series Resonant Converter

This paper appears in: Aerospace and Electronic Systems, IEEE Transactions on

Issue Date: Nov. 1985

Volume: AES-21 Issue:6

On page(s): 791 - 799

ISSN: 0018-9251

References Cited: 10

Cited by: 9

Digital Object Identifier: 10.1109/TAES.1985.310664

Date of Current Version: 20 Февраль 2007

Sponsored by: Aerospace & Electronic Systems Society

Abstract

The series resonant converter is analyzed in steady state, and for constant switching frequency the output current and voltage characteristics are found to be ellipses. The converter operating point can then be easily obtained by superimposing a load line on these elliptical characteristics. Peak resonant capacitor voltage and inductor current are also plotted in the output plane and are dependent to first order only on output current. When peak voltage and current are plotted in this manner, the dependence of component stresses on operating point is clearly revealed. The output characteristics are modified to include the effect of transistor and diode voltage drops, and experimental verification is presented.

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