TY - JOUR
T1 - Resonant LLC DC-DC Converter Employing Fixed Switching Frequency Based on Dual-Transformer with Wide Input-Voltage Range
AU - Khan, Salman
AU - Sha, Deshang
AU - Jia, Xiangshuai
AU - Wang, Sunbo
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2021/1
Y1 - 2021/1
N2 - In this article, a dual-transformer-based LLC resonant converter is proposed, which is a hybrid combination of a full-bridge and half-bridge LLC circuits. The output voltage is regulated through fixed-frequency phase-shift pulsewidth modulation control scheme, whereas the switching frequency is equal to the resonant frequency, which helps to design the magnetic components. The turns-ratio design of the two transformers is analyzed by the current stress and power distribution of both transformers with two different cases. The proposed converter is capable of realizing soft switching over wide input-voltage and whole load range. Finally, a prototype converter of 1 kW is built and the experiments are conducted under wide input-voltage and full load range. The experimental results show that the proposed converter can achieve high efficiency throughout the full load range.
AB - In this article, a dual-transformer-based LLC resonant converter is proposed, which is a hybrid combination of a full-bridge and half-bridge LLC circuits. The output voltage is regulated through fixed-frequency phase-shift pulsewidth modulation control scheme, whereas the switching frequency is equal to the resonant frequency, which helps to design the magnetic components. The turns-ratio design of the two transformers is analyzed by the current stress and power distribution of both transformers with two different cases. The proposed converter is capable of realizing soft switching over wide input-voltage and whole load range. Finally, a prototype converter of 1 kW is built and the experiments are conducted under wide input-voltage and full load range. The experimental results show that the proposed converter can achieve high efficiency throughout the full load range.
KW - DC-DC power converters
KW - pulsewidth modulation (PWM)
KW - transformers
KW - zero voltage switching (ZVS)
UR - http://www.scopus.com/inward/record.url?scp=85091212568&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2020.3001161
DO - 10.1109/TPEL.2020.3001161
M3 - Article
AN - SCOPUS:85091212568
SN - 0885-8993
VL - 36
SP - 607
EP - 616
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 1
M1 - 9112721
ER -