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| Parameter Model and Design for LLC Resonant Half-bridge Converter |
| Wang Zhendao1, Zhao Yakui1, Zhang Jing2, Wu Xu1, Yi Feng3 |
| 1. School of Physics and Microelectronics Sciences, Hunan University Changsha 410082 China 2. College of Electrical and Information Engineering, Hunan University Changsha 410082 China 3. China Electronics Technology Group Corporation NO.58 Research Institute Wuxi 214000 China |
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Abstract According to working principle of LLC topology, a mathematical model for LLC resonant half- bridge converter is presented in this paper. On the basis of conversion relations between the best conversion efficiency and wide scope of load changes, leakage inductance, magnetic inductance and resonant capacitance are confirmed according to the proposed model. Also a LLC resonant half-bridge converter is designed. By improving switch frequency to MHz-level, its converter efficiency can reach to 94% either in full or light loader. At the same time, the power density can reach to 500W/in3. Experiment results ultimately verify the correctness of the model and parameter deduction.
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Received: 22 February 2012
Published: 20 March 2014
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[1] Robert L, Steigerwald. A comparison of half-bridge resonant converter topologies[J]. IEEE Transactions on Power Electronics, 1988, 3(2): 174-182.
[2] Groot H De, Janssen E, Pagano R, et al. Design of a 1-MHz LLC resonant converter based on a DSP-driven SOI half-bridge power MOS module[J]. IEEE Transactions on Power Electronics, 2007, 22(6): 2307-2320.
[3] Yu R Y, Godwin K Y H, Bryan M H P, et al. Computer-aided design and optimization of high-efficiency LLC series resonant converter[J]. IEEE Transactions on Power Electronics, 2012, 27(7): 3243-3256.
[4] Wu X, Hua G, Zhang J, et al. A new current driven synchronous rectifier for series-parallel resonant (LLC) DC-DC converter[J]. IEEE Transactions on Indastry Electronics, 2010, 58(1): 289-297.
[5] Fu D, Liu Y, Lee F C, Xu M. A novel driving scheme for synchronous rectifiers in LLC resonant converters[J]. IEEE Transactions Power Electronics, 2009, 24(5): 1321-1329.
[6] Zhang J M, Liao J W, Wang J F, et al. A current-driving synchronous rectifier for an LLC resonant converter with voltage-doubler rectifier structure[J]. IEEE Transactions on Power Electronics, 2012, 27(4): 1894-1904.
[7] Yang B, Lee F C, Cheng R Y. LLC resonant convener for front end DC/DC conversion[C]. Applied Power Electronics Conference and Exposition, USA, Dallas, 2002, 2: 1108-1112.
[8] Ju W C. LLC DC/DC resonant converter with PLL control scheme[D]. National Cheng Kung University, 2006.
[9] Francisco C, Peter B, Lee F C. A wide input voltage and load output variations fixed-frequency ZVS DC/DC LLC resonant converter for high-power applications[C]. 37th Industry Applications Conference, USA, Pittsburgh, 2002, 4: 2306-2313.
[10] Beiranvand R, Rashidian B, Zolghadri M R, et al. Optimizing the normalized dead-time and maximum switching frequency of a wide-adjustable-range LLC resonant converter[J]. IEEE Transactions on Power Electronics, 2011, 26(2): 462-472.
[11] Patrizio V. Factorized power architecture with point of load sine amplitude converters[P]. U. S, 6984965, 2006-01-10. |
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2012, Vol. 27 
