本論文提出提出了非隔離型雙向直流－直流轉換器，此轉換器由耦合電感、箝位架構與切換式電容架構所組成，可應用在儲能系統的電池與直流匯流排之間的能量雙向傳遞。開關上的跨壓受箝位架構所限制，耦合電感中的漏電感能量可經由特定開關上的寄生二極體回收。切換式電容組成的倍壓架構不但能夠提升轉換器的電壓轉換率，還可以減少耦合電感的匝數比，達到更小的電路體積。
　　針對本篇論文提出的電路架構區分出升壓模式及降壓模式，並對轉換操作模式進行分析。另外介紹穩態分析及參數設計。
　　最後，透過實作將電路架構實體化，轉換器的規格為低壓側電壓48V、高壓側電壓400V、額定輸出功率400W 的實體電路，驗證了此電路架構的可行性與性能。切換頻率100kHz 下，升壓模式中最高效率為93.28%，降壓模式最高效率為94.43%。

In this thesis, a bidirectional DC-DC converter is proposed, which consists of a coupled inductor, a clamp architecture and a switched capacitor architecture. It can be applied to the bidirectional transfer of energy between the battery of the energy storage system and the DC bus. The voltage on the switch is limited by the clamp architecture, and the leakage inductance energy in the coupled inductor can be recovered via parasitic diodes on the specific switch. The voltage multiplier structure composed of switched capacitors can not only improve the voltage conversion rate of the converter, but also reduce the turns ratio of the coupled inductor, resulting in a smaller circuit volume.
　　For the circuit architecture proposed in this thesis, the boost mode and the buck mode are distinguished, and the conversion operation mode is analyzed. In addition, steady-state analysis and parameter design are introduced.
　　Finally, through the realization of the circuit structure, a DC-DC converter is designed, the switching frequency is 100kHz, the low-voltage side voltage is 48V, the high-voltage side voltage is 400V, and the rated output power is 400W, which verifies the feasibility and performance of the circuit structure. The highest efficiency in boost mode is 93.28%, and the highest efficiency in buck mode is 94.43%

[1] Y. E. Wu, "Novel High-Step-Up/Step-Down Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems," Energies, 2022, pp. 1-3.
[2] Huawu Liu, Haibing Hu, Hongfei Wu, Yan Xing, and Issa Batarseh, "Overview of High-Step-Up Coupled-Inductor Boost Converters," IEEE Journal of Emerging and Selected Topics in Power Electronics, 2016, pp. 689-704.
[3] T. J. Liang, Tsorng-Juu Liang, Ru-Cian Lin, Peng Luo, and Kai-Hui Chen "A Non-Isolated Bidirectional DC-DC Converter with High Conversion Ratio," 2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia), 2022.
[4] H. Liao, Y. T. Chen, Linda Chen, J. F. Chen, "Development of a Bidirectional DC–DC Converter with Rapid Energy Bidirectional Transition Technology," Energies, 2022.
[5] R. Ling, G. Zhao, and Q. Huang, "High step-up interleaved boost converter with low switch voltage stress," Electric Power Systems Research, 2015, pp. 11-18.
[6] C. M. Lai, Y. C. Lin, and D. Lee, "Study and Implementation of a Two-Phase Interleaved Bidirectional DC/DC Converter for Vehicle and DC-Microgrid Systems," in Energies 8, 2015, no. 9: pp. 9969-9991.
[7] J. Sreedhar and B. Basavaraja, ''Plan and Analysis of Synchronous Buck Converter for UPS application,'' in International Journal of Engineering & Technology, 2018, Special Issue 1.
[8] Y. Zhang, Y. Zhang, W. Zhang, F. Gao, S. Gao, and Daniel J. Rogers, "A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors," in EVs. IEEE Transactions on Power Electronics, 2020, pp. 1536-1547.
[9] T. Urabe, K. Nishijima, T. Sato, T. Nabeshima, "A novel tapped-inductor buck converter for home DC power supply system," in 2012 International Conference on Renewable Energy Research and Applications (ICRERA), 2012.
[10] A. Chadha, A. Ayachit, D. K. Saini, and M. K. Kazimierczuk, "Steady-state Analysis of PWM Tapped-inductor Buck DC-DC Converter in CCM," in IEEE Texas Power and Energy Conference (TPEC), 2018, pp. 1-6.
[11] K. I. Hwu, W. Z. Jiang, and Y. T. Yau, "Ultrahigh step-down converter," IEEE Transactions on Power Electronics, vol. 30, pp. 3262-3274, 2015.
[12] Yeu-Torng Yau, Wen-Zhuang Jiang, and Kuo-Ing Hwu, "Step-down converter with wide voltage conversion ratio," IET Power Electronics, vol. 8, pp. 2136-2144, 2015.
[13] K. Nishijima, K. Abe, D. Ishida, T. Nakano, T. Nabeshima, T. Sato, K. Harada, "A novel tapped-inductor buck converter for divided power distribution system," in 2006 37th IEEE Power Electronics Specialists Conference. 2006.
[14] K. I. Hwu, and W. Z. Jiang, "Non-isolated dual half-bridge ZVS/ZCS high step-down converter with zero DC bias current coupled inductor and active clamp," in 2016 IEEE International Conference on Sustainable Energy Technologies (ICSET), 2016.
[15] V. R. Tintu, and M. George, "Tapped Inductor Technology Based DC-DC Converter," in International Conference on Signal Processing, Communication, Computing and Networking Technologies, 2011, pp. 747-753.
[16] A. Samadian, S. H. Hosseini, M. Sabahi, and M. Maalandish, "A New Coupled Inductor Nonisolated High Step-Up Quasi Z-Source DC–DC Converter," IEEE Transactions on Industrial Electronics, 2020, pp. 5389-5397.
[17] E. Ribeiro, A. J. M. Cardoso, and C. Boccaletti, "Fault diagnosis in non-isolated bidirectional half-bridge DC-DC converters," in IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014.
[18] B. M. Reddy, and P. Samuel, "A comparative analysis of non-isolated bi-directional dc-dc converters," 2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES), pp. 1-6, 2016.
[19] Y. E. Wu, and B. H. Pan, "High Efficiency and Voltage Conversion Ratio Bidirectional Isolated DC-DC Converter for Energy Storage System," IEEE Access, 2022, pp. 55187-55199.
[20] S. A. Gorji, H. G. Sahebi, M. Ektesabi, and A. B. Rad, "Topologies and Control Schemes of Bidirectional DC–DC Power Converters: An Overview," in IEEE Access, vol. 7, pp. 117997-118019, 2019.
[21] P. Odo, "A Comparative Study of Single-phase Non-isolated Bidirectional DC-DC Converters Suitability for Energy Storage Application in a dc Microgrid," 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), pp. 391-396, 2020.
[22] Y. Ding, L. He, and Z. Liu, "Bi-directional bridge modular switched-capacitor-based DC-DC converter with phase-shift control," in 2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016.
[23] R. H. Ashique, and Z. Salam, "A Family of True Zero Voltage Zero Current Switching (ZVZCS) Nonisolated Bidirectional DC–DC Converter with Wide Soft Switching Range," in IEEE Transactions on Industrial Electronics, vol. 64, no. 7, pp. 5416-5427, July 2017.
[24] H. Ardi, A. Ajami, F. Kardan, and S. N. Avilagh, "Analysis and Implementation of a Nonisolated Bidirectional DC–DC Converter with High Voltage Gain," in IEEE Transactions on Industrial Electronics, vol. 63, no. 8, pp. 4878-4888, Aug. 2016.
[25] S. Yahyazadeh, M. Khaleghi, S. Farzamkia, and A. Khoshkbar-Sadigh, "A New Structure of Bidirectional DC-DC Converter for Electric Vehicle Applications," 2020, 11th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC), 2020.
[26] V. R. Tintu, and M. George, "Tapped inductor technology based DC-DC converter," in 2011 International Conference on Signal Processing, Communication, Computing and Networking Technologies, 2011.
[27] Z. Wang, P. Wang, B. Li, X. Ma, and P. Wang, "A Bidirectional DC–DC Converter With High Voltage Conversion Ratio and Zero Ripple Current for Battery Energy Storage System," IEEE Transactions on Power Electronics, 2021, pp. 8012-8027.