TY - JOUR
T1 - Efficiency Improvement on LLC Resonant Converter Using Integrated LCLC Resonant Transformer
AU - Lin, Ray Lee
AU - Huang, Lung Hua
N1 - Funding Information:
Manuscript received April 19, 2017; revised July 11, 2017 and September 16, 2017; accepted October 21, 2017. Date of publication November 7, 2017; date of current version March 19, 2018. Paper 2017-IACC-0449.R2, presented at the 2016 IEEE Industry Applications Society Annual Meeting, Portland, OR, USA, Oct. 2–6, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Industrial Automation and Control Committee of the IEEE Industry Applications Society. This work was supported in part by the Ministry of Science and Technology, Taiwan, under Award MOST 104-2221-E-006-087, and in part by the Program of Top 100 Universities Advancement, Ministry of Education, Taiwan. (Corresponding author: Ray-Lee Lin.) The authors are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 2017 IEEE.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - This paper presents the efficiency improvement on the comparative half-bridge LLC resonant converter using the integrated LCLC resonant transformer. The conventional isolated LLC converter demands large leakage inductance to attain high power factor for the resonant tank. However, the large leakage inductance requires more turns of the transformer to sustain sufficient magnetizing inductance. As a result, high number of turns causes more copper loss and lower efficiency for the LLC resonant transformer. In order to reduce the demanded leakage inductance, a resonant capacitor can be connected in parallel to the magnetizing inductor through an auxiliary winding as an LCLC resonant transformer. Finally, the resonant transformer of a commercial 300 W LLC resonant converter is converted as an integrated LCLC resonant transformer with lower leakage inductance for efficiency comparison.
AB - This paper presents the efficiency improvement on the comparative half-bridge LLC resonant converter using the integrated LCLC resonant transformer. The conventional isolated LLC converter demands large leakage inductance to attain high power factor for the resonant tank. However, the large leakage inductance requires more turns of the transformer to sustain sufficient magnetizing inductance. As a result, high number of turns causes more copper loss and lower efficiency for the LLC resonant transformer. In order to reduce the demanded leakage inductance, a resonant capacitor can be connected in parallel to the magnetizing inductor through an auxiliary winding as an LCLC resonant transformer. Finally, the resonant transformer of a commercial 300 W LLC resonant converter is converted as an integrated LCLC resonant transformer with lower leakage inductance for efficiency comparison.
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U2 - 10.1109/TIA.2017.2771728
DO - 10.1109/TIA.2017.2771728
M3 - Article
AN - SCOPUS:85033669005
SN - 0093-9994
VL - 54
SP - 1756
EP - 1764
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 2
ER -