TY - JOUR
T1 - Analysis, Design, and Investigation of a Soft-Switched Buck Converter With High Efficiency
AU - Talebian, Iman
AU - Alavi, Peyman
AU - Marzang, Vafa
AU - Babaei, Ebrahim
AU - Khoshkbar-Sadigh, Arash
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - In this article, a new simple buck converter with zero voltage switching (ZVS) performance and almost zero output current ripple is proposed. The proposed structure's auxiliary circuit contains a capacitor and an inductor without any switches, which makes it possible to minimize the switching losses and eliminate other additional losses. The main power diode also turns off under zero current switching condition and the reverse recovery losses of the power diode is minimized. Eliminating the switching losses and the reverse recovery losses allows the converter to operate with high power efficiency, which makes it a good option for high power efficiency-required applications. In this article, five operational modes are explained. The design section includes the designing criteria of the components. Also, the efficiency analysis, control system for stabilizing the output voltage, and applying a variable inductor to ensure the soft-switching operation are analyzed. The comparison results are also discussed. Moreover, an experimental prototype of the proposed structure at 200 W output power and 75 kHz frequency is built to prove the above-mentioned advantages. Finally, the soft-switching waveforms are obtained for different output powers with various duty cycles and equal switching frequency to verify the ZVS performance of the converter at different loads and changes in input voltage and duty cycle.
AB - In this article, a new simple buck converter with zero voltage switching (ZVS) performance and almost zero output current ripple is proposed. The proposed structure's auxiliary circuit contains a capacitor and an inductor without any switches, which makes it possible to minimize the switching losses and eliminate other additional losses. The main power diode also turns off under zero current switching condition and the reverse recovery losses of the power diode is minimized. Eliminating the switching losses and the reverse recovery losses allows the converter to operate with high power efficiency, which makes it a good option for high power efficiency-required applications. In this article, five operational modes are explained. The design section includes the designing criteria of the components. Also, the efficiency analysis, control system for stabilizing the output voltage, and applying a variable inductor to ensure the soft-switching operation are analyzed. The comparison results are also discussed. Moreover, an experimental prototype of the proposed structure at 200 W output power and 75 kHz frequency is built to prove the above-mentioned advantages. Finally, the soft-switching waveforms are obtained for different output powers with various duty cycles and equal switching frequency to verify the ZVS performance of the converter at different loads and changes in input voltage and duty cycle.
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U2 - 10.1109/TPEL.2021.3132463
DO - 10.1109/TPEL.2021.3132463
M3 - Article
AN - SCOPUS:85120863277
SN - 0885-8993
VL - 37
SP - 6899
EP - 6912
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 6
ER -