Е-Публикации
Технически университет - София

Abstract: In the presented paper, a study of a step-down DC-DC converter was performed. Three different values of the output capacitance were used. A mathematical model was implemented in MATLAB/Simulink. The frequency response of the system was analyzed using Bode plots for different converter configurations. The influence of output capacitance variations on the stability and dynamic performance of the system was investigated. Three different bus configurations were considered, each of which was tested with capacitance values of 1mF, 1.8mF and 3.3mF, which allows a comparative assessment of their influence on the resonant frequencies, gain and system behavior. The analysis showed that increasing the output capacitance leads to a downward shift in the resonant frequencies and a decrease in the amplitude of high-frequency oscillations, which improves the stability of the system. The results emphasize the importance of careful selection of the output capacitance to balance the dynamic response, stability and filtering efficiency in DC-DC converters.

References

1. E. Parimalasundar, S. Maneesha, R. Hanish, P. M. Reddy, P. K. Harish and P. K. Rao, "Performance Analysis of DC-DC Converter for Electric Vehicle Charging Applications, " 2023 7th International Conference on Computing Methodologies and Communication (ICCMC), Erode, India, 2023, pp. 1543-1546, doi: 10. 1109/ICCMC56507. 2023. 10084154.
2. D. Cho et al., "A High-Efficiency Single-Mode Dual-Path Buck-Boost Converter With Reduced Inductor Current, " in IEEE Journal of Solid-State Circuits, vol. 58, no. 3, pp. 720-731, March 2023, doi: 10. 1109/JSSC. 2022. 3230424.
3. M. J. Sathik, J. D. Navamani, A. Lavanya, Y. Yang, D. Almakhles and F. Blaabjerg, "Reliability Analysis of Power Components in Restructured DC/DC Converters, " in IEEE Transactions on Device and Materials Reliability, vol. 21, no. 4, pp. 544-555, Dec. 2021, doi: 10. 1109/TDMR. 2021. 3116941.
4. A. Wei, B. Lehman, W. Bowhers and M. Amirabadi, "A soft-switching non-inverting buck-boost converter, " 2021 IEEE Applied Power Electronics Conference and Exposition (APEC), Phoenix, AZ, USA, 2021, pp. 1920-1926, doi: 10. 1109/APEC42165. 2021. 9487051.
5. G. Zashev, V. Dimitrov, D. Arnaudov and F. Stoimenov, "Frequency Response Measurements Techniques for Current Mode DC-DC Converters, " 2022 30th National Conference with International Participation (TELECOM), Sofia, Bulgaria, 2022, pp. 1-4, doi: 10. 1109/TELECOM56127. 2022. 10017329.
6. M. Schulz, N. Schleippmann, K. Gosses, B. Wunder and M. Marz, "Four Switch Buck/Boost Converter for DC Microgrid Applications, " 2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe), Lyon, France, 2020, pp. 1-10, doi: 10. 23919/EPE20ECCEEurope43536. 2020. 9215754.
7. K. A. Ogudo and P. Umenne, "Design of a PV Based Power Supply with a NonInverting Buck-Boost Converter, " 2019 IEEE PES/IAS PowerAfrica, Abuja, Nigeria, 2019, pp. 545-549, doi: 10. 1109/PowerAfrica. 2019. 8928656.
8. K. Asparuhova and T. Grigorova, "IGBT Behavioral PSPICE Model, " 2006 25th International Conference on Microelectronics, Belgrade, Serbia, 2006, pp. 203-206, doi: 10. 1109/ICMEL. 2006. 1650931.
9. Garg, Man Mohan, Mukesh Kumar Pathak and Yogesh Vijay Hote. "Effect of Non-Idealities on the Design and Performance of a DC-DC Buck Converter. " Journal of Power Electronics 16 (2016): 832-839.
10. Hayat, Aamir, Daud Sibtain, Ali F. Murtaza, Sulman Shahzad, Muhammad Sheheryar Jajja, and Heybet Kilic. 2023. "Design and Analysis of Input Capacitor in DC-DC Boost Converter for Photovoltaic-Based Systems" Sustainability 15, no. 7: 6321. https: //doi. org/10. 3390/su15076321
11. Zhao, X., Zhang, L., Born, R., & Lai, J. J. (2015). Output capacitance effect on the voltage gain in the high step-up series resonant converter. 2015 IEEE 2nd International Future Energy Electronics Conference (IFEEC), 1-5.
12. https: //itg-electronics. com/en/
13. https: //www. micro-semiconductor. pt

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