Active-Clamped Circuit Zero-Current Switching Current-Fed Half-Bridge Converter With Energy Recovery

This paper presents an auxiliary circuit for the current-fed half-bridge (CFHB) converter, aiming to clamp the high voltage spikes across the main switches caused by the energy stored in the leakage inductance of the power transformer and recover the energy present in the clamping capacitor. The pro...

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Bibliographic Details
Published in2023 15th IEEE International Conference on Industry Applications (INDUSCON) pp. 1576 - 1582
Main Authors Da Silva, Glauco E. R., De O. Stein, Carlos M., Da Costa, Jean P., Carati, Emerson G., Cardoso, Rafael
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.11.2023
Subjects
ACCFHB
Capacitors
Clamps
Converters
DC-DC power conversion
High-voltage techniques
photovoltaic power systems
Semiconductor diodes
Switches
Windings
Zero voltage switching
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Summary:This paper presents an auxiliary circuit for the current-fed half-bridge (CFHB) converter, aiming to clamp the high voltage spikes across the main switches caused by the energy stored in the leakage inductance of the power transformer and recover the energy present in the clamping capacitor. The proposed auxiliary circuit employs only one active switch in the same ground reference of the main switches. The proposed converter operates with zero-current switching (ZCS) at turn-on and zero-voltage switching (ZVS) at turn-off of the main switches. Besides that, it also provides ZCS at the turn-on of the auxiliary switch and turn-off of the auxiliary diode. The energy is recovered to the load without losing galvanic isolation due to coupled inductors in the auxiliary circuit. A 360 W prototype was built to validate the analysis and design proposed.
ISSN:2572-1445
DOI:10.1109/INDUSCON58041.2023.10374934