Analysis and Design of the $L_{m}C$ Resonant Converter for Low Output Current Ripple

In this paper, an LmC resonant converter is proposed for low output current ripple, and its steady-state analysis and design guidelines are investigated. In the LmC converter, the current stress of the output capacitors is reduced due to the inductive output filter, and the series resonant inductor is removed while maintaining the benefits of an LLC resonant converter such as zero-voltage switching and narrow switching frequency range. The mode analysis is described, and the steady-state characteristics are explored using the extended describing function. Based on the result, the design guidelines are suggested. A 240-W 24-V/10-A hardware prototype is built and tested to verify the analysis results and to evaluate the performance of the LmC resonant converter.

[1]  F. Lee,et al.  LLC resonant converter for front end DC/DC conversion , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[2]  Jianping Ying,et al.  Analysis and Implementation of LLC Burst Mode for Light Load Efficiency Improvement , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[3]  Gun-Woo Moon,et al.  Load sharing characteristic of two-phase interleaved LLC resonant converter with parallel and series input structure , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[4]  P. Mattavelli,et al.  Analysis of multi-phase LLC resonant converters , 2009, 2009 Brazilian Power Electronics Conference.

[5]  Junming Zhang,et al.  A New Current-Driven Synchronous Rectifier for Series–Parallel Resonant ( $LLC$) DC–DC Converter , 2011, IEEE Transactions on Industrial Electronics.

[6]  Vivek Agarwal,et al.  Small signal analysis of the LCC-type parallel resonant converter using discrete time domain modeling , 1995, IEEE Trans. Ind. Electron..

[7]  A.J. Gilbert,et al.  Analysis of CLL Voltage-Output ResonantConverters Using Describing Functions , 2008, IEEE Transactions on Power Electronics.

[8]  Ching-Ming Lai,et al.  A single-stage AC/DC converter based on zero voltage switching LLC resonant topology , 2007 .

[9]  Zhengyu Lu,et al.  A Flexible Converter With Two Selectable Topologies , 2009, IEEE Transactions on Industrial Electronics.

[10]  Jee-Hoon Jung,et al.  Design Methodology for Transformers Including Integrated and Center-tapped Structures for LLC Resonant Converters , 2009 .

[11]  J.A. Cobos,et al.  Circuit Oriented Model of Rectifiers for Large Signal Envelope Simulation , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[12]  Paolo Mattavelli,et al.  Current sharing in three-phase LLC interleaved resonant converter , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[13]  Fred C. Lee,et al.  Dynamic analysis and control design of LCC resonant converter , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[14]  Eun-Soo Kim,et al.  Two Phase Interleaved LLC Resonant Converter , 2009 .

[15]  Chen Zhao,et al.  Design and Comparison of Two Front-end Dc/Dc Converters: LLC Resonant Converter and Soft-switched Phase-shifted Full-bridge Converter with Primary-side Energy Storage Inductor , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[16]  Gun-Woo Moon,et al.  Novel Two-Phase Interleaved LLC Series-Resonant Converter Using a Phase of the Resonant Capacitor , 2009, IEEE Transactions on Industrial Electronics.

[17]  T. Jin,et al.  Multiphase LLC Series Resonant Converter for Microprocessor Voltage Regulation , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[18]  Fernando Nuño García,et al.  Dynamic and Steady-State Models for the PRC-LCC Resonant Topology With a Capacitor as Output Filter , 2007, IEEE Transactions on Industrial Electronics.

[19]  Xinbo Ruan,et al.  A Hybrid Fuel Cell Power System , 2009, IEEE Transactions on Industrial Electronics.

[20]  Ji Tae Kim,et al.  A half bridge LC resonant converter with reduced current ripple of the output capacitor , 2009, INTELEC 2009 - 31st International Telecommunications Energy Conference.

[21]  F.C. Lee,et al.  A Novel Driving Scheme for Synchronous Rectifiers in LLC Resonant Converters , 2009, IEEE Transactions on Power Electronics.

[22]  George C. Verghese,et al.  Sampled-data modeling and digital control of resonant converters , 1988 .

[23]  E. Janssen,et al.  Design of a 1-MHz LLC Resonant Converter Based on a DSP-Driven SOI Half-Bridge Power MOS Module , 2007 .

[24]  Gun-Woo Moon,et al.  Analysis and design of two-phase interleaved LLC resonant converter considering load sharing , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[25]  Yu Fang,et al.  Standby Mode Control Circuit Design of LLC Resonant Converter , 2007, 2007 IEEE Power Electronics Specialists Conference.

[26]  Hang-Seok Choi,et al.  Design Consideration of Half-Bridge LLC Resonant Converter , 2007 .