Abstract
A current-driven soft-switched full-bridge converter is presented. It contains a snubber formed by a switched-capacitor circuit and a resonant inductor, connected in the primary side. The transformer leakage inductance is used as a part of the resonant circuit. All the main switches are turned-on/off with zero-current-switching (ZCS), and the switches in the snubber are zero-voltage-switched (ZVS). The snubber capacitor voltage is adaptively controlled: for each actual value of the input/load current, the capacitor is charged to the minimum resonant energy necessary for assuring the softswitching, thus reducing to minimum the circulated energy. There is no extra voltage stress on the switches. All the elements are submitted to the same voltages/currents as their counterparts in a hard-switching full-bridge converter, keeping the conduction losses to minimum. A 530V/15kV, 5kW prototype was built. The experimental results confirmed the theoretical predictions, the proposed soft-switching method resulting in an increase of the conversion efficiency. © 2009 IEEE.
| Original language | English |
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| Title of host publication | 2009 IEEE Energy Conversion Congress and Exposition, ECCE 2009 |
| Pages | 1991-1998 |
| DOIs | |
| Publication status | Published - 2009 |
| Event | 2009 IEEE Energy Conversion Congress and Exposition (ECCE 2009) - San Jose, United States Duration: 20 Sept 2009 → 24 Sept 2009 |
Conference
| Conference | 2009 IEEE Energy Conversion Congress and Exposition (ECCE 2009) |
|---|---|
| Place | United States |
| City | San Jose |
| Period | 20/09/09 → 24/09/09 |
Research Keywords
- Adaptable soft-switching
- Dc-dc conversion
- Full-bridge converter
- High voltage converter
- Zero-current switching