TY - GEN
T1 - A simplified quadrilateral current modulation strategy for bidirectional four-switch buck-boost converters
AU - Guan, Yueshi
AU - Yu, Xiaohan
AU - Wang, Yijie
AU - Xu, Dianguo
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - This paper derives the condition for achieving the minimum root mean square (RMS) current of the inductor in a Four-Switch Buck-Boost (FSBB) converter through mathematical analysis. Based on this, a control method suitable for bidirectional FSBB converters is proposed. The proposed method enables soft switching of all power switches over the entire operating range, while maintaining fixed-frequency control under most output conditions. Furthermore, by analyzing the relationship between circuit parameters and output characteristics, a dual-PI control loop is employed to introduce slight frequency variation under high-power output conditions, ensuring that the inductor consistently meets the minimum RMS current condition. Finally, a prototype was developed and experimentally tested within the 490-500kHz frequency range, achieving a peak efficiency of 98.4%.
AB - This paper derives the condition for achieving the minimum root mean square (RMS) current of the inductor in a Four-Switch Buck-Boost (FSBB) converter through mathematical analysis. Based on this, a control method suitable for bidirectional FSBB converters is proposed. The proposed method enables soft switching of all power switches over the entire operating range, while maintaining fixed-frequency control under most output conditions. Furthermore, by analyzing the relationship between circuit parameters and output characteristics, a dual-PI control loop is employed to introduce slight frequency variation under high-power output conditions, ensuring that the inductor consistently meets the minimum RMS current condition. Finally, a prototype was developed and experimentally tested within the 490-500kHz frequency range, achieving a peak efficiency of 98.4%.
KW - Four-Switch Buck-Boost (FSBB)
KW - high frequency
KW - minimum RMS current
KW - soft switching
UR - https://www.scopus.com/pages/publications/105024937133
U2 - 10.1109/ZPEC67225.2025.11213478
DO - 10.1109/ZPEC67225.2025.11213478
M3 - 会议稿件
AN - SCOPUS:105024937133
T3 - 2025 Zhejiang Power Electronics Conference, ZPEC 2025 - Conference Proceedings
SP - 515
EP - 520
BT - 2025 Zhejiang Power Electronics Conference, ZPEC 2025 - Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2025 Zhejiang Power Electronics Conference, ZPEC 2025
Y2 - 22 August 2025 through 24 August 2025
ER -