TY - GEN
T1 - Design and Implementation of Improved SEPIC Bidirectional DC-DC Converter with Switched Inductors
AU - Chiu, Po Hsun
AU - Chen, Yi Hung
AU - Liao, Hsuan
AU - Chen, Jiann Fuh
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - The objective of this paper is to modify the topology of the unidirectional non-coupled inductor modified SEPIC converter to a bidirectional topology and applied between the DC bus and the battery energy storage system. To improve the conversion ratio, active switched inductors are employed, eliminating the need for a coupled inductor or transformer. This approach offers several advantages, including continuous input current non-inverting input and output. Furthermore, by increasing the switching frequency and utilizing wide bandgap components such as gallium nitride (GaN) instead of Si-based MOSFETs, the converter's volume can be reduced while achieving high efficiency and excellent high-frequency characteristics. The paper will provide an analysis of the operational principles and present experimental results with the following specifications: low side voltage of 48V, high side voltage of 400V, switching frequency of 500kHz, and output power of 500W. The step-down mode achieves a peak efficiency of 93.7%, while the step-up mode reaches a peak efficiency of 90.9%.
AB - The objective of this paper is to modify the topology of the unidirectional non-coupled inductor modified SEPIC converter to a bidirectional topology and applied between the DC bus and the battery energy storage system. To improve the conversion ratio, active switched inductors are employed, eliminating the need for a coupled inductor or transformer. This approach offers several advantages, including continuous input current non-inverting input and output. Furthermore, by increasing the switching frequency and utilizing wide bandgap components such as gallium nitride (GaN) instead of Si-based MOSFETs, the converter's volume can be reduced while achieving high efficiency and excellent high-frequency characteristics. The paper will provide an analysis of the operational principles and present experimental results with the following specifications: low side voltage of 48V, high side voltage of 400V, switching frequency of 500kHz, and output power of 500W. The step-down mode achieves a peak efficiency of 93.7%, while the step-up mode reaches a peak efficiency of 90.9%.
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U2 - 10.1109/IFEEC58486.2023.10458553
DO - 10.1109/IFEEC58486.2023.10458553
M3 - Conference contribution
AN - SCOPUS:85189758091
T3 - 2023 International Future Energy Electronics Conference, IFEEC 2023
SP - 44
EP - 47
BT - 2023 International Future Energy Electronics Conference, IFEEC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 6th International Future Energy Electronics Conference, IFEEC 2023
Y2 - 20 November 2023 through 23 November 2023
ER -