TY - GEN
T1 - A Bidirectional Switch Based Half-Bridge Series-Resonant Converter Operating in DCM and CCM
AU - Bai, Changkyu
AU - Han, Byeongcheol
AU - Kim, Minsung
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/3
Y1 - 2020/3
N2 - Conventional asymmetric half-bridge LLC converters have been attractive in on-board battery charger applications because of their simple control and structure. However, their usage with asymmetric PWM is limited due to the large dc-offset current and increased conduction loss. In this paper, we propose a bidirectional switch based half-bridge series-resonant converter. Proposed converter features a small number of power components, inherent zero voltage switching capability, and a zero dc-offset current. The combination of the half-bridge circuit and the bidirectional switch generates symmetric resonant current with the zero dc-offset current regardless of the duty cycle variation. When the output voltage is high, it operates in discontinuous conduction mode (DCM). When the output voltage becomes low and under heavy load condition, it naturally enters in continuous conduction mode (CCM), and so it provides low conduction loss. A 1.65-kW prototype of the proposed converter has been built and tested to demonstrate its circuit design.
AB - Conventional asymmetric half-bridge LLC converters have been attractive in on-board battery charger applications because of their simple control and structure. However, their usage with asymmetric PWM is limited due to the large dc-offset current and increased conduction loss. In this paper, we propose a bidirectional switch based half-bridge series-resonant converter. Proposed converter features a small number of power components, inherent zero voltage switching capability, and a zero dc-offset current. The combination of the half-bridge circuit and the bidirectional switch generates symmetric resonant current with the zero dc-offset current regardless of the duty cycle variation. When the output voltage is high, it operates in discontinuous conduction mode (DCM). When the output voltage becomes low and under heavy load condition, it naturally enters in continuous conduction mode (CCM), and so it provides low conduction loss. A 1.65-kW prototype of the proposed converter has been built and tested to demonstrate its circuit design.
KW - Asymmetric PWM
KW - continuous conduction mode
KW - discontinuous conduction mode
KW - zero dc-offset current
KW - zero-voltage switching
UR - http://www.scopus.com/inward/record.url?scp=85087766967&partnerID=8YFLogxK
U2 - 10.1109/APEC39645.2020.9124251
DO - 10.1109/APEC39645.2020.9124251
M3 - Conference contribution
AN - SCOPUS:85087766967
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 2109
EP - 2115
BT - APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Y2 - 15 March 2020 through 19 March 2020
ER -