TY - JOUR
T1 - ZVS-Interleaved Synchronous Buck DC-DC Converter With a Coupled Inductor by Varying Switching Frequency and Deadtime
AU - Sha, Deshang
AU - Zhao, Yuting
AU - Zhang, Debin
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022/7/1
Y1 - 2022/7/1
N2 - This article proposes a fully digital variable switching frequency and deadtime control method for a synchronous rectifier buck dc-dc converter with an inverse coupled inductor. It does not need auxiliary circuits, zero-crossing detection (ZCD), or high-bandwidth sensors. Even in facing the polyline shape of the current in inductors due to the coupling effect, zero-voltage switching (ZVS) can be achieved with the proposed varying switching frequency control to make the turn off current be constant. Based on ZVS achievement of the power switches, the deadtime is variable to reduce the conduction loss over body diodes further. The modes and resonant process are analyzed in detail. A 1-kW experimental prototype was built to verify the effectiveness of the proposed control method. The peak efficiency is over 99% in the experimental test.
AB - This article proposes a fully digital variable switching frequency and deadtime control method for a synchronous rectifier buck dc-dc converter with an inverse coupled inductor. It does not need auxiliary circuits, zero-crossing detection (ZCD), or high-bandwidth sensors. Even in facing the polyline shape of the current in inductors due to the coupling effect, zero-voltage switching (ZVS) can be achieved with the proposed varying switching frequency control to make the turn off current be constant. Based on ZVS achievement of the power switches, the deadtime is variable to reduce the conduction loss over body diodes further. The modes and resonant process are analyzed in detail. A 1-kW experimental prototype was built to verify the effectiveness of the proposed control method. The peak efficiency is over 99% in the experimental test.
KW - Inverse coupled inductor
KW - variable deadtime
KW - variable switching frequency
KW - zero-voltage switching (ZVS)
UR - http://www.scopus.com/inward/record.url?scp=85122883858&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2022.3141253
DO - 10.1109/TPEL.2022.3141253
M3 - Article
AN - SCOPUS:85122883858
SN - 0885-8993
VL - 37
SP - 8190
EP - 8198
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 7
ER -