TY - GEN
T1 - Extended Describing Function Modeling and Closed-Loop Control of LLC Converter in Battery Charging Applications
AU - Lordoglu, Abdulsamed
AU - Gulbahce, Mehmet Onur
AU - Ahmet Kocabas, Derya
AU - Dusmez, Serkan
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/9/2
Y1 - 2021/9/2
N2 - The variable switching frequency control of LLC converters makes the modeling and compensator design rather a difficult task. In this paper, an extended describing function modeling that can represent the beat frequency successfully has been examined in detail. The small signal model of the converter dynamics has been extracted for output current and voltage. Two compensators have been designed to close the loop for constant-current and constant-voltage operations considering main operating regions. The performances of the designed compensators have been verified under different load conditions. It has been shown that the designed controller successfully tracks the reference output current and voltage appropriately by adjusting the switching frequency.
AB - The variable switching frequency control of LLC converters makes the modeling and compensator design rather a difficult task. In this paper, an extended describing function modeling that can represent the beat frequency successfully has been examined in detail. The small signal model of the converter dynamics has been extracted for output current and voltage. Two compensators have been designed to close the loop for constant-current and constant-voltage operations considering main operating regions. The performances of the designed compensators have been verified under different load conditions. It has been shown that the designed controller successfully tracks the reference output current and voltage appropriately by adjusting the switching frequency.
KW - LLC converter
KW - bode plot
KW - control
KW - extended describing function
KW - proportional-integral controller
UR - http://www.scopus.com/inward/record.url?scp=85119686689&partnerID=8YFLogxK
U2 - 10.1109/OPTIM-ACEMP50812.2021.9590032
DO - 10.1109/OPTIM-ACEMP50812.2021.9590032
M3 - Conference contribution
AN - SCOPUS:85119686689
T3 - 2021 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2021 and 2021 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2021
SP - 274
EP - 279
BT - 2021 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2021 and 2021 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 International Aegean Conference on Electrical Machines and Power Electronics, ACEMP 2021 and 2021 International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2021
Y2 - 2 September 2021 through 3 September 2021
ER -