TY - GEN
T1 - An Interleaved 6-Level GaN bidirectional converter with an active energy buffer for level II electric vehicle Charging
AU - Chou, Derek
AU - Liao, Zitao
AU - Fernandez, Kelly
AU - Gebrael, Tarek
AU - Popovic, George
AU - Mahony, Raya
AU - Miljkovic, Nenad
AU - Pilawa-Podgurski, Robert C.N.
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/6/14
Y1 - 2021/6/14
N2 - On-board electric vehicle (EV) chargers provide ac to dc conversion capability to charge a high-voltage battery pack. As they are carried within a vehicle at all times, high efficiency and high power density are desirable traits for such a converter, in order to reduce the size, weight, and power loss of the system. Bidirectional capability is also desirable for an on-board charger to support vehicle-to-grid ancillary applications. This paper presents the implementation of a bidirectional single-phase ac-dc converter, converting between universal ac (120-240 VAC) and 400 VDC. Discussions of system architecture, control, mechanical design and assembly, and thermal management of an interleaved 6-level flying capacitor multilevel (FCML) power factor correction (PFC) stage with a twice-line-frequency series-stacked buffer (SSB) stage are included. Experimental results demonstrating dc-ac inverter operations at the kilowatt scale are provided. A peak efficiency exceeding 99% is observed, and a maximum power of 6.1 kW is tested.
AB - On-board electric vehicle (EV) chargers provide ac to dc conversion capability to charge a high-voltage battery pack. As they are carried within a vehicle at all times, high efficiency and high power density are desirable traits for such a converter, in order to reduce the size, weight, and power loss of the system. Bidirectional capability is also desirable for an on-board charger to support vehicle-to-grid ancillary applications. This paper presents the implementation of a bidirectional single-phase ac-dc converter, converting between universal ac (120-240 VAC) and 400 VDC. Discussions of system architecture, control, mechanical design and assembly, and thermal management of an interleaved 6-level flying capacitor multilevel (FCML) power factor correction (PFC) stage with a twice-line-frequency series-stacked buffer (SSB) stage are included. Experimental results demonstrating dc-ac inverter operations at the kilowatt scale are provided. A peak efficiency exceeding 99% is observed, and a maximum power of 6.1 kW is tested.
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U2 - 10.1109/APEC42165.2021.9487122
DO - 10.1109/APEC42165.2021.9487122
M3 - Conference contribution
AN - SCOPUS:85115679765
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 1203
EP - 1208
BT - 2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2021
Y2 - 14 June 2021 through 17 June 2021
ER -