|
[1] P. Delforge and J. Whitney, “Data Center Efficiency Assessment,” Natural Resources Defense Council (NRDC), 2014. [Online]. Available:
https://www.nrdc.org/sites/default/files/data-center-efficiency-assessment-IP.pdf.
[2] United States Department of Energy, “Energy 101: Energy Efficient Data Centers.” [Online]. Available：
https://www.energy.gov/eere/videos/energy-101-energy-efficient-data-centers
[3] Efficiency in Data Centers. [Online]. Available：
https://www.comsoc.org/publications/tcn/2019-nov/energy-efficiency-data-centers
[4] E. R. Masanet et al., Global Data Center Energy Use: Distribution, Compo- sition, and Near-Term Outlook, Evanston, IL, 2018.
[5] IEA (2020), “Data Centers and Data Transmission Networks”, IEA, Paris, 2020. [Online]. Available:
https://www.iea.org/reports/datacentres-and-data-transmission-networks
[6] M. Mu and F. C. Lee, “Design and Optimization of a 380–12 V High-Frequency, High-Current LLC Converter With GaN Devices and Planar Matrix Transformers’’ in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 4, no. 3, pp. 854-862, Sept. 2016, doi: 10.1109/JESTPE.2016.2586964.
[7] C. Wang and P. Jain, “A Quantitative Comparison and Evaluation of 48V DC and 380V DC Distribution Systems for Datacenters,” 2014 IEEE 36th International Telecommunications Energy Conference (INTELEC), 2014, pp. 1-7, doi: 10.1109/INTLEC.2014.6972112.
[8] E. Taylor, M. Korytowski and G. Reed, “Voltage Transient Propagation in AC and DC Datacenter Distribution Architectures,” 2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012, pp. 1998-2004, doi: 10.1109/ECCE.2012.6342567.
[9] IEEE.tv, “KeyTalk with Xin Li and Shuai Jiang: Google 48V Power Architecture – APEC 2017.” [Online]. Available：https://ieeetv.ieee.org/ieeetv-specials/keytalk-xin-li-and-shuai-jiang-google-48v-power-architecture-apec-2017?rf=events|114&
[10] R. Rong and R. Wang, “High efficiency 1.5kW 48V-12V DCDC Converter with Leadless MOSFET for Mild Hybrid Electric Vehicle,” PCIM Asia 2018; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Shanghai, China, 2018, pp. 1-6.
[11] L. Zhang and S. Chakraborty, “An Interleaved Series-Capacitor Tapped Buck Converter for High Step-Down DC/DC Application,” in IEEE Transactions on Power Electronics, vol. 34, no. 7, pp. 6565-6574, July 2019,doi: 10.1109/TPEL.2018.2877309.
[12] Y. Zhang and M. de Rooij, “300 W 48V-12V Digitally Controlled 1/16 Brick DC-DC Converter Using GaN FETs,” PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Germany, 2020, pp. 1-4.
[13] S. Webb and Y. Liu, “12 Switch Zero-Inductor Voltage Converter Topology,” 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019, pp. 2189-2196, doi: 10.1109/APEC.2019.8722328.
[14] Z. Ye, Y. Lei and R. C. N. Pilawa-Podgurski, “A Resonant Switched Capacitor Based 4-to-1 Bus Converter Achieving 2180 W/in3 Power Density and 98.9% Peak Efficiency,” 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), 2018, pp. 121-126, doi: 10.1109/APEC.2018.8340997.
[15] Z. Ye, Y. Lei and R. C. N. Pilawa-Podgurski, “A 48-to-12 V Cascaded Resonant Switched-Capacitor Converter for Data Centers with 99% Peak Efficiency and 2500 W/in3 Power Density,” 2019 IEEE Applied Power Electronics Conference and Exposition(APEC), Anaheim, CA, USA, 2019, pp. 13-18, doi: 10.1109/APEC.2019.8721812.
[16] G. Sovik, T. Urkin, E. E. Masandilov and M. Mordechai Peretz, “Optimal Self-Tuning Control for Data-Centers’ 48V-12V ZCS-STC,” 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), New Orleans, LA, USA, 2020, pp. 455-462, doi: 10.1109/APEC39645.2020.9124129.
[17] S. Jiang, C. Nan, X. Li, C. Chung, and M. Yazdani, “Switched Tank Converters,” in Proc. IEEE Appl. Power Electron. Conf. Expo., San Antonio, TX, USA, 2018, pp. 81–90.
[18] Y. Ren, M. Xu, K. Yao and F. C. Lee, “Two-stage 48 V Power Pod Exploration for 64-bit Microprocessor,” Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03., Miami Beach, FL, USA, 2003, pp. 426-431 vol.1, doi: 10.1109/APEC.2003.1179248.
[19] M. Ahmed, C. Fei, F. C. Lee and Q. Li, “High Efficiency Two-Stage 48V VRM with PCB Winding Matrix Transformer,” 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, 2016, pp. 1-8, doi: 10.1109/ECCE.2016.7855150.
[20] T. Liu, X. Wu and S. Yang, “1 MHz 48V-12V Regulated DCX with Single Transformer,” in IEEE Journal of Emerging and Selected Topics in Power Electronics, doi: 10.1109/JESTPE.2019.2955607.
[21] M. H. Ahmed, A. Nabih, F. C. Lee and Q. Li, “High-efficiency, High-density Isolated/Regulated 48V Bus Converter with a Novel Planar Magnetic Structure,” 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), Anaheim, CA, USA, 2019, pp. 468-475, doi: 10.1109/APEC.2019.8722216.
[22] M. H. Ahmed, F. C. Lee and Q. Li, “Two-Stage 48V VRM With Intermediate Bus Voltage Optimization For Data Centers,” in IEEE Journal of Emerging and Selected Topics in Power Electronics, doi: 10.1109/JESTPE.2020.2976107.
[23] B. Yang, F. C. Lee, A. J. Zhang and G. S. Huang, “LLC Resonant Converter for Front end DC/DC Conversion,” APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335), Dallas, TX, USA, 2002, pp. 1108-1112 vol.2.
[24] B. Yang, “Topology Investigation of Front End DC/DC Power Conversion for Distributed Power System,” PhD Dissertation, 2003.
[25] W. Feng and F. C. Lee, “Optimal Trajectory Control of LLC Resonant Converters for Soft Start-Up,” in IEEE Transactions on Power Electronics, vol. 29, no. 3, pp. 1461-1468, March 2014, doi: 10.1109/TPEL.2013.2261094.
[26] W. Feng and F. C. Lee, “Optimal Trajectory Control of LLC Resonant Converters for Soft Start-up,” 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2013, pp. 1445-1451, doi: 10.1109/APEC.2013.6520488.
[27] C. Fei, W. Feng, F. C. Lee and Q. Li, “Soft Start-up for High Frequency LLC Resonant Converter with Optimal Trajectory Control,” 2015 IEEE Applied Power Electronics Conference and Exposition (APEC), 2015, pp. 609-615, doi: 10.1109/APEC.2015.7104412.
[28] C. Fei, W. Feng, F. C. Lee and Q. Li, “Digital Implementation of Soft Start-Up and Short-Circuit Protection for High-Frequency LLC Converters With Optimal Trajectory Control (OTC),” in IEEE Transactions on Power Electronics, vol. 32, no. 10, pp. 8008-8017, Oct. 2017, doi: 10.1109/TPEL.2016.2631467.
[29] C. Fei, W. Feng, F. C. Lee and Q. Li, “State-trajectory Control of LLC Converter Implemented by Microcontroller,” 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014, 2014, pp. 1045-1052, doi: 10.1109/APEC.2014.6803436.
[30] A. Nabih, M. Ahmed, Q. Li and F. C. Lee, “Simplified Optimal Trajectory Control for 1 MHz LLC Converter with Wide Input Voltage Range,” 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), 2019, pp. 212-219, doi: 10.1109/APEC.2019.8722275.
[31] A. Nabih, M. H. Ahmed, Q. Li and F. C. Lee, “Transient Control and Soft Start-Up for 1-MHz LLC Converter With Wide Input Voltage Range Using Simplified Optimal Trajectory Control,” in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 1, pp. 24-37, Feb. 2021, doi: 10.1109/JESTPE.2020.2973660.
[32] J. Millán, P. Godignon, X. Perpiñà, A. Pérez-Tomás and J. Rebollo, “A Survey of Wide Bandgap Power Semiconductor Devices,” in IEEE Transactions on Power Electronics, vol. 29, no. 5, pp. 2155-2163, May 2014, doi: 10.1109/TPEL.2013.2268900.
[33] U. K. Mishra, P. Parikh and Yi-Feng Wu, “AlGaN/GaN HEMTs-an overview of Device Operation and Applications,” in Proceedings of the IEEE, vol. 90, no. 6, pp. 1022-1031, June 2002, doi: 10.1109/JPROC.2002.1021567.
[34] D. Lin, P. Zhou, W. N.Fu, Z. Badics and Z. J. Cendes, “A Dynamic Core Loss Model for Soft Ferromagnetic and Power Ferrite Materials in Transient Finite Element Analysis,” in IEEE Transactions on Magnetics, vol. 40, no. 2, pp. 1318-1321, March 2004, doi: 10.1109/TMAG.2004.825025.
[35] H. Cui and K. D. T. Ngo, “Transient Core-Loss Simulation for Ferrites With Nonuniform Field in SPICE,” in IEEE Transactions on Power Electronics, vol. 34, no. 1, pp. 659-667, Jan. 2019, doi: 10.1109/TPEL.2018.2812856.
[36] Y. C. Liu, C Chen, K. D. Chen, Y. L. Syu, M. C. Tsai, “High-Frequency LLC Resonant Converter with GaN Devices and Integrated Magnetics,” Energies 2019, 12, 1781.
[37] C. Fei, W. Feng, F. C. Lee and Q. Li, “High-Efficiency High-Power-Density LLC Converter With an Integrated Planar Matrix Transformer for High-Output Current Applications,” in IEEE Transactions on Industrial Electronics, vol. 64, no. 11, pp. 9072-9082, Nov. 2017, doi: 10.1109/TIE.2017.2674599.
[38] D. Huang, S. Ji and F. C. Lee, "LLC Resonant Converter With Matrix Transformer," in IEEE Transactions on Power Electronics, vol. 29, no. 8, pp. 4339-4347, Aug. 2014, doi: 10.1109/TPEL.2013.2292676.
[39] S. Wang, H. Wu, F. C. Lee and Q. Li, "Integrated Matrix Transformer with Optimized PCB Winding for High-Efficiency High-Power-Density LLC Resonant Converter," 2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019, pp. 6621-6627, doi: 10.1109/ECCE.2019.8911885.
[40] E. Rong, S. Li, R. Zhang, X. Du, Q. Min and S. Lu, "A Magnetic Integration Half-turn Planar Transformer for LLC Resonant DC-DC Converters," 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), San Antonio, TX, 2018, pp. 484-488, doi: 10.1109/APEC.2018.8341055.
[41] M. K. Ranjram and D. J. Perreault, "Leveraging Multi-Phase and Fractional-Turn Integrated Planar Transformers for Miniaturization in Data Center Applications," 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), 2020, pp. 1-8, doi: 10.1109/COMPEL49091.2020.9265752.
[42] Y. C. Liu et al., "Design and Implementation of a Planar Transformer With Fractional Turns for High Power Density LLC Resonant Converters," in IEEE Transactions on Power Electronics, vol. 36, no. 5, pp. 5191-5203, May 2021, doi: 10.1109/TPEL.2020.3029001.
[43] Y. C. Liu et al., "Quarter-Turn Transformer Design and Optimization for High Power Density 1-MHz LLC Resonant Converter," in IEEE Transactions on Industrial Electronics, vol. 67, no. 2, pp. 1580-1591, Feb. 2020, doi: 10.1109/TIE.2019.2902821.
[44] M. H. Ahmed, F. C. Lee, Q. Li and M. d. Rooij, "Design Optimization of Unregulated LLC Converter with Integrated Magnetics for Two-Stage 48V VRM," 2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019, pp. 521-528, doi: 10.1109/ECCE.2019.8912785.
[45] Infineon Inc., “Resonant LLC Converter: Operation and Design 250W 33Vin 400Vout Design Example.” [Online]. Available：https://www.infineon.com/dgdl/Infineon-MOSFET_OptiMOS_resonant_LLC_converter_operation_and_design-AN-v01_00-EN.pdf?fileId=db3a30433acf32c9013ad11cddde01b6
[46] MPS Inc., “Application Note for an LLC Resonant Converter Using Resonant Controller HR1000A.” [Online]. Available：https://www.monolithicpower.cn/cn/documentview/productdocument/index/version/2/document_type/Application%20Note/lang/en/sku/HR1000A/document_id/5926/
[47] C. Fei, M. H. Ahmed, F. C. Lee and Q. Li, "Two-Stage 48 V-12 V/6 V-1.8 V Voltage Regulator Module With Dynamic Bus Voltage Control for Light-Load Efficiency Improvement," in IEEE Transactions on Power Electronics, vol. 32, no. 7, pp. 5628-5636, July 2017, doi: 10.1109/TPEL.2016.2605579.
[48] B. Yang, F. C. Lee and M. Concannon, "Over Current Protection Methods for LLC Resonant Converter," Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03., 2003, pp. 605-609 vol.2, doi: 10.1109/APEC.2003.1179276.
[49] Y. -C. Liu et al., "Design and Development of a Fractional-turn Transformer for High Power Density LLC Resonant Converters," 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021, pp. 335-342, doi: 10.1109/APEC42165.2021.9487397.
[50] P. L. Dowell, "Effects of Eddy Currents in Transformer Windings," in Proceedings of the Institution of Electrical Engineers, vol. 113, no. 8, pp. 1387-1394, August 1966, doi: 10.1049/piee.1966.0236.
[51] J. Schäfer, D. Bortis and J. W. Kolar, "Novel Highly Efficient/Compact Automotive PCB Winding Inductors Based on the Compensating Air-Gap Fringing Field Concept," in IEEE Transactions on Power Electronics, vol. 35, no. 9, pp. 9617-9631, Sept. 2020, doi: 10.1109/TPEL.2020.2969295.
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