TY - JOUR
T1 - Highly Efficient Single Power-Conversion Resonant DC/AC Converter Without Output Filter
AU - Park, Jae Woong
AU - Wagaye, Tsegaab Alemayehu
AU - Raheem, Hamid
AU - Li, Yitong
AU - Liu, Jinjun
AU - Kim, Minsung
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - This article introduces the single power-conversion resonant dc/ac converter, which eliminates the requirement for an output filter. Use of a resonant neutral-point-clamped cell allows nearly zero-voltage-switching turn-off of the primary-side outer switches at high instantaneous power, and close to half of the input voltage at low instantaneous power. Through the use of split transformer and semibridgeless structure with the secondary-side duty-ratio fixed at 0.5, the converter ensures a ripple-free output current, negating the need for an additional output filter. Notably, this topology also circumvents magnetizing current flow through the external resonant inductor, thereby, reducing the core size of the resonant inductor. In addition, the design facilitates zero current switching turn-off at the primary-side inner switches and effectively prevents any reverse recovery problem with the primary-side diodes. To validate the proposed concept, a 1-kW rated prototype capable of converting 400-V input to a 220-Vrms grid voltage was constructed and experimentally tested.
AB - This article introduces the single power-conversion resonant dc/ac converter, which eliminates the requirement for an output filter. Use of a resonant neutral-point-clamped cell allows nearly zero-voltage-switching turn-off of the primary-side outer switches at high instantaneous power, and close to half of the input voltage at low instantaneous power. Through the use of split transformer and semibridgeless structure with the secondary-side duty-ratio fixed at 0.5, the converter ensures a ripple-free output current, negating the need for an additional output filter. Notably, this topology also circumvents magnetizing current flow through the external resonant inductor, thereby, reducing the core size of the resonant inductor. In addition, the design facilitates zero current switching turn-off at the primary-side inner switches and effectively prevents any reverse recovery problem with the primary-side diodes. To validate the proposed concept, a 1-kW rated prototype capable of converting 400-V input to a 220-Vrms grid voltage was constructed and experimentally tested.
KW - Compact core size
KW - low switching loss
KW - resonant neutral-point-clamped (NPC) cell
KW - ripple free
KW - semibridgeless structure
UR - http://www.scopus.com/inward/record.url?scp=85187408569&partnerID=8YFLogxK
U2 - 10.1109/TIE.2024.3366216
DO - 10.1109/TIE.2024.3366216
M3 - Article
AN - SCOPUS:85187408569
SN - 0278-0046
VL - 71
SP - 14146
EP - 14160
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 11
ER -