本論文提出隔離型半橋LCLC諧振式直流電源轉換器之諧振槽與其積體化變壓器之分析與設計，俾以採用相對於傳統隔離式LLC直流電源轉換器，較小之串聯諧振電感值。傳統的隔離型LLC諧振式直流電源轉換器，可採用較大的漏感值來提升於開關柔切頻率範圍內諧振槽的功率因數，卻也會造成漏磁。
為了降低積體化變壓器所需的漏感值，可藉由加入並聯諧振電容於輔助繞組上，來並聯於LLC諧振槽中之激磁電感，係為LCLC諧振槽。
此外，植基於LCLC諧振槽之分析，找到適合操作之開關柔切頻率範圍，來改善諧振槽的功率因數與提升其功率轉換效率。
最後，實做一雛型之積體化變壓器予300W之隔離型半橋LCLC諧振式直流電源轉換器，俾以驗證本論文所提出的LCLC諧振槽設計應用之可行性。

This thesis presents the resonant tank analysis and integrated transformer for the implementation of the isolated LCLC DC-DC resonant converter to have less leakage inductance of the transformer than that for the isolated LLC resonant converter. Large leakage inductance is demanded for the isolated LLC resonant converter to have high power factor within the soft-switching frequency range, but causes flux leakage.
In order to reduce the demanded leakage inductance of the integrated transformer, a parallel resonant capacitor can be paralleled to the magnetizing inductor through the connection of an auxiliary winding as an LCLC resonant tank.
Furthermore, based on the analysis for the LCLC resonant tank, the suitable soft-switching frequency range for the resonant tank can be obtained to improve the power factor and the power conversion efficiency for the resonant tank.
Finally, the experimental integrated transformer designed for a 300W isolated half-bridge LCLC resonant converter is built to verify the improvement on power conversion efficiency.

[1] B. Yang, F. C. Lee, A. J. Zhang, and G. Huang, “LLC Resonant Converter for Front End DC/DC Conversion,” 2002 IEEE Applied Power Electronics Conference and Exposition, vol. 2, pp. 1108-1112, 2002.
[2] D. Fu, Y. Liu, F. C. Lee, and M. Xu, “A Novel Driving Scheme for Synchronous Rectifiers in LLC Resonant Converters,” IEEE Transactions on Power Electronics, vol. 24, no. 5, pp. 1321-1329, May 2009.
[3] H. D. Groot, E. Janssen, R. Pagano, and K. Schetters, “Design of a 1-MHz LLC Resonant Converter Based on a DSP-Driven SOI Half-Bridge Power MOS Module,” IEEE Transactions on Power Electronics, vol. 22, no. 6, pp. 2307-2320, Nov. 2007.
[4] Y. Chin and F. C. Lee, “Constant-frequency parallel-resonant converter,” IEEE Transactions on Power Electronics, vol. 25, no. 1, pp. 133-142, Jan.-Feb. 1989.
[5] G. Ivensky, S. Bronshtein, and A. Abramovitz, “Approximate Analysis of Resonant LLC DC-DC Converter,” IEEE Transactions on Power Electronics, vol. 26, no. 11, pp. 3274-3284, Nov. 2011.
[6] R. L. Steigerwald, “A comparison of half-bridge resonant converter topologies,” IEEE Transactions on Power Electronics, vol. 3, no. 2, pp. 174-182, Apr. 1988.
[7] D. J. Tschirhart and P. K. Jain, “A CLL Resonant Asymmetrical Pulsewidth-Modulated Converter with Improved Efficiency,” IEEE Transactions on Industrial Electronics, vol. 55, no. 1, pp. 114-122, Jan. 2008.
[8] R. Farrington, M. M. Jovanovic, and F. C. Lee, “Design oriented analysis of reactive power in resonant converters,” IEEE Transactions on Power Electronics, vol. 8, no. 4, pp. 411-422, Oct. 1993.
[9] R. L. Lin and C. W. Lin, “Design criteria for resonant tank of LLC DC-DC resonant converter,” 2010 IEEE Industrial Electronics Conference, Phoenix, Arizona, USA, Nov. 7-10, 2010, pp. 421-426.
[10] R. L. Lin and W. C. Ju, “LLC DC/DC Resonant Converter with PLL Control Scheme,” 2007 IEEE Applied Power Electronics Conference, pp. 1537-1543, 2007.
[11] W. Chen, G. Hua, D. Sable, and F. C. Lee, “Design of High Efficiency, Low Profile, Low Voltage Converter with Integrated Magnetics,” 1997 IEEE Applied Power Electronics Conference and Exposition, vol. 2, pp. 911-917, Feb. 1997.
[12] K. Jin, Y. Sun, M. Xu, D. Sterk, and F. C. Lee, “Integrated Magnetic Self-Driven ZVS Non-isolated Full-Bridge Converter,” IEEE Transactions on Industrial Electronics, vol. 57, no. 5, pp. 1615-1623, May 2010.
[13] D. Sterk, M. Xu, and F. C. Lee, “High Frequency ZVS Self-driven Full-Bridge Using Full Integration of Magnetics,” 2005 IEEE Applied Power Electronics Conference and Exposition, vol. 2, pp. 1210-1216, Mar. 2005.
[14] I. O. Lee, S. Y. Cho, and G. W. Moon, “Three-Level Resonant Converter With Double LLC Resonant Tanks for High-Input-Voltage Applications,” IEEE Transactions on Industrial Electronics, vol. 59, no. 9, pp. 3450-3463, Sep. 2012.
[15] S. Yang; M. Shoyama, T. Zaitsu, J. Yamamoto, S. Abe, and T. Ninomiya, “Detail operating characteristics of Bi-directional LLC resonant converter,” ICRERA 2012 International Conference on Renewable Energy Research and Applications, pp. 1-6, Nov. 2012.
[16] B. Yang, R. Chen, and F. C. Lee, “Integrated magnetic for LLC resonant converter,” 2002 IEEE Applied Power Electronics Conference and Exposition, vol. 1, pp. 346-351, 2002.
[17] P. Xu, Q. Wu, P. L. Wong, and F. C. Lee, “A Novel Integrated Current Doubler Rectifier,” 2000 IEEE Applied Power Electronics Conference and Exposition, vol. 2, pp. 735-740, 2000.
[18] J. B. Wang, “Reduction in conducted EMI noises of a switching power supply after thermal management design,” IEE Proceedings-Electric Power Applications, vol. 150, no. 3, pp. 301-310, May 2003.
[19] A. Conesa, G. Velasco, H. Martinez, and M. Roman, “LCLC resonant converter as maximum power point tracker in PV systems,” European Conference on Power Electronics and Applications, pp. 1-9, Sept. 2009.
[20] C. M. Bingham, Y. A. Ang, M. P. Foster, and D. A. Stone, “Analysis and Control of Dual-Output LCLC Resonant Converters With Significant Leakage Inductance,” IEEE Transactions on Power Electronics, vol. 23, no. 4, pp. 1724-1732, July 2008.
[21] Texas Instruments “LLC Resonant Half-Bridge Converter 300-W Evaluation Module,” SLUU361 datasheet, Apr. 2009.