TY - GEN
T1 - Isolated active-clamped SEPIC PFC converter based on SiC devices and integrated magnetics
AU - Wu, Deliang
AU - Ayyanar, Rajapandian
N1 - Funding Information:
ACKNOWLEDGEMENT This work was partly supported by the Office of Energy Efficiency and Renewable Energy, U.S. Department of Energy with North Carolina State University, PowerAmerica Institute, under Award DE-EE0006521.
Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - An isolated active-clamped SEPIC PFC converter based on SiC devices and integrated magnetics is presented. Multiple advantageous features are achieved with a single integrated four-winding magnetic structure, including zero voltage switching (ZVS) for the SiC MOSFETs, isolated output, lossless clamp for the output diode and ripple steering for the input inductor current. Power density is significantly improved by integrating the input inductor with the isolation transformer. Input current ripple reduction can be achieved by adjusting the leakage inductances. A fourth winding together with a low cost, low current rating diode is used to suppress the resonance induced by the parasitic capacitance of the output diode and to clamp the peak voltage across the output diode. With the integrated magnetic structure (IMS), the favorable features of the SiC devices are exploited and their parasitics induced adverse impact is reduced. The performance of the converter with the IMS is verified with a 1.5kW prototype switching at 200 kHz. The power density of the converter is increased by 21% compared to the converter with discrete magnetics.
AB - An isolated active-clamped SEPIC PFC converter based on SiC devices and integrated magnetics is presented. Multiple advantageous features are achieved with a single integrated four-winding magnetic structure, including zero voltage switching (ZVS) for the SiC MOSFETs, isolated output, lossless clamp for the output diode and ripple steering for the input inductor current. Power density is significantly improved by integrating the input inductor with the isolation transformer. Input current ripple reduction can be achieved by adjusting the leakage inductances. A fourth winding together with a low cost, low current rating diode is used to suppress the resonance induced by the parasitic capacitance of the output diode and to clamp the peak voltage across the output diode. With the integrated magnetic structure (IMS), the favorable features of the SiC devices are exploited and their parasitics induced adverse impact is reduced. The performance of the converter with the IMS is verified with a 1.5kW prototype switching at 200 kHz. The power density of the converter is increased by 21% compared to the converter with discrete magnetics.
KW - Active-clamped SEPIC
KW - Integrated magnetics
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U2 - 10.1109/WiPDA46397.2019.8998826
DO - 10.1109/WiPDA46397.2019.8998826
M3 - Conference contribution
AN - SCOPUS:85081170601
T3 - 2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019
SP - 151
EP - 156
BT - 2019 IEEE 7th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th Annual IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2019
Y2 - 29 October 2019 through 31 October 2019
ER -