Analysis of Voltage Gain Tolerance Due to the Resonant Circuit Variation of LLC Resonant Converter

Hiroyuki Haga, Hidenori Maruta, Fujio Kurokawa

Abstract


The LLC converter is anattractive solution for high power application, hence many photovoltaic systems which use LLC converter have been proposed. It is important on mass production stage to clarify the relationship between design parameters and its voltage gain tolerance which is caused by component variations. This issue is especially important for systems whose LLC converter is directly connected to photovoltaic panels, because there is no boost converter which can compensate insufficient voltage gain of the LLC converter. However the voltage gain tolerance of the LLC converter has rarely studied. Therefore we researched the relationship between the voltage gain tolerance and three normalized parameters which are related to the resonant circuit by Monte Carlo analysis. As a result, it has found that there is a linear area where voltage gain tolerance becomes to be small in quality factor – inductance ratio plane. By utilizing this knowledge, designers can reduce unnecessary losses of the LLC converter which are generated by too much voltage gain margin.

Keywords


LLC converter; voltage gain; tolerance; Monte Carlo analysis

Full Text:

PDF

References


Eun-Soo Kim, Sung-In Kang, Kwang-Ho Yoon and Yoon-Ho Kim, “A contactless power supply for photovoltaic power generation systemâ€, Applied Power Electronics Conference and Exposition, 2008. APEC 2008. Twenty-Third Annual IEEE, Austin, TX, pp. 1910-1913, 24-28 Feb. 2008.

Q. Zhang, C. Hu, L. Chen, A. Amirahmadi, N. Kutkut, Z. J. Shen, I. Batarseh, “A center point iteration MPPT method with application on the frequency-modulated LLC micro inverterâ€, IEEE Transactions on Power Electronics, vol. 29, no. 3, pp. 1262-1274, March 2014.

Xiaofeng Sun, Yanfeng Shen and Wuying Li, “A novel LLC integrated three-port dc-dc converter for stand-alone PV/battery systemâ€, Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo, Beijing, pp. 1-6, 31 Aug.-3 Sept. 2014.

L. Chen, A. Amirahmadi, Q. Zhang, N. Kutkut and I. Batarseh, “Design and implementation of three-phase two-stage grid-connected module integrated converterâ€, IEEE Transactions on Power Electronics, vol. 29, no. 8, pp. 3881-3892, Aug. 2014.

T. Jiang, Q. Lin, J. Zhang and Y. Wang, “A novel ZVS and ZCS three-port LLC resonant converter for renewable energy systemsâ€, 2014 IEEE Energy Conversion Congress and Exposition (ECCE), Pittsburgh, pp. 2296-2302, 14-18 Sept. 2014.

H. D. Gui, Z. Zhang, X. F. He and Y. F. Liu, “A high voltage-gain LLC micro-converter with high efficiency in wide input range for PV applicationsâ€, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014, Fort Worth, pp. 637-642, 16-20 March 2014.

G. Yang, P. Dubus and D. Sadarnac, “Analysis of the load sharing characteristics of the series-parallel connected interleaved LLC resonant converterâ€, Optimization of Electrical and Electronic Equipment (OPTIM), 2012 13th International Conference on, Brasov, pp. 798-805, 24-26 May 2012.

J. Binder, C. Oeder, M. Barwig and T. Duerbaum, “Influence of component tolerances onto design and losses of resonant LLC convertersâ€, Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on, Lappeenranta, pp. 1-10, 26-28 Aug. 2014.

R. L. Steigerwald, “A comparison of half-bridge resonant converter topologiesâ€, IEEE Transactions on Power Electronics, vol. 3, no. 2, pp. 174-182, Apr. 1988.

T. Duerbaum, “First harmonic approximation including design constraintsâ€, Telecommunications Energy Conference, 1998. INTELEC. Twentieth International, San Francisco, pp. 321-328, 4-8 Oct. 1998.

S. De Simone, C. Adragna, C. Spini and G. Gattavari, “Design-oriented steady-state analysis of LLC resonant converters based on FHAâ€, International Symposium on Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006., Taormina, pp. 200-207, 23-26 May 2006.

H. Huang, “FHA-based voltage gain function with harmonic compensation for LLC resonant converterâ€, Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE, Palm Springs, pp. 1770-1777, 21-25 Feb. 2010.

The SCAT page in Keisoku Giken web site, http://www.keisoku.co.jp/en/products/power/scat.html, last visited: 6 October 2016




DOI (PDF): https://doi.org/10.20508/ijrer.v6i4.5304.g6952

Refbacks

  • There are currently no refbacks.


Online ISSN: 1309-0127

Publisher: Gazi University

IJRER is cited in SCOPUS, EBSCO, WEB of SCIENCE (Clarivate Analytics);

IJRER has been cited in Emerging Sources Citation Index from 2016 in web of science.

WEB of SCIENCE between 2020-2022; 

h=30,

Average citation per item=5.73

Impact Factor=(1638+1731+1808)/(189+170+221)=9.24

Category Quartile:Q4