TY - GEN
T1 - New CRM Topology for Zero Voltage Switching in Quadratic High Gain Boost Converter
AU - Korada, Nikhil
AU - Ayyanar, Raja
N1 - Funding Information:
This material is based upon work supported by the U.S. Department of Energys Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office Award Number DE-EE0008773.
Publisher Copyright:
© 2020 IEEE.
PY - 2020/10/11
Y1 - 2020/10/11
N2 - This paper proposes a new critical conduction mode (CRM) DC-DC topology based on quadratic high gain boost converter (QHGBC). Quadratic converter is a high gain topology, which has the drawbacks of high conduction loss in the input diodes and high switching loss in the main switch. A direct implementation of CRM scheme for QHGBC does not result in soft switching, as the switch voltage is clamped to the intermediate level by the input diodes. Adding a small auxiliary inductor in series with one of the input diode as proposed here, together with suitable design considerations for output side inductor and resonant time, results in complete zero voltage switching (ZVS) for both the MOSFETs. Additionally, input diode transitions undergo zero current switching (ZCS) without reverse recovery, which reduces the overall electromagnetic interference (EMI) issues. The main advantage of CRM approach for QHGBC is that the input current ripple can be very small and only the output side inductor which carries significantly lower current needs to have a high ripple. PLECS based extensive simulations and results obtained from hardware prototype corresponding to the DC-DC stage of a PV microinverter validate the performance of the proposed converter. A peak efficiency of 96.4%, and efficiencies above 94.7% under all operating conditions are achieved.
AB - This paper proposes a new critical conduction mode (CRM) DC-DC topology based on quadratic high gain boost converter (QHGBC). Quadratic converter is a high gain topology, which has the drawbacks of high conduction loss in the input diodes and high switching loss in the main switch. A direct implementation of CRM scheme for QHGBC does not result in soft switching, as the switch voltage is clamped to the intermediate level by the input diodes. Adding a small auxiliary inductor in series with one of the input diode as proposed here, together with suitable design considerations for output side inductor and resonant time, results in complete zero voltage switching (ZVS) for both the MOSFETs. Additionally, input diode transitions undergo zero current switching (ZCS) without reverse recovery, which reduces the overall electromagnetic interference (EMI) issues. The main advantage of CRM approach for QHGBC is that the input current ripple can be very small and only the output side inductor which carries significantly lower current needs to have a high ripple. PLECS based extensive simulations and results obtained from hardware prototype corresponding to the DC-DC stage of a PV microinverter validate the performance of the proposed converter. A peak efficiency of 96.4%, and efficiencies above 94.7% under all operating conditions are achieved.
KW - Critical conduction mode
KW - GaN
KW - high gain boost
KW - quadratic
KW - wide band gap devices
KW - zero current switching
KW - zero voltage switching
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U2 - 10.1109/ECCE44975.2020.9235483
DO - 10.1109/ECCE44975.2020.9235483
M3 - Conference contribution
AN - SCOPUS:85097174465
T3 - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
SP - 4794
EP - 4801
BT - ECCE 2020 - IEEE Energy Conversion Congress and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Y2 - 11 October 2020 through 15 October 2020
ER -