An Isolated Active-Clamped Circuit Current-Fed Half-Bridge Converter
This paper presents an isolated regenerative active-clamped circuit designed for the current-fed half-bridge (IRACCFHB) converter. Its primary function is to reduce high voltage spikes across the main switches caused by energy stored in the leakage inductance of the power transformer using a clampin...
| Authors: | , , , , , , |
|---|---|
| Format: | article |
| Status: | Published version |
| Publication Date: | 2025 |
| Country: | Brasil |
| Institution: | Associação Brasileira de Eletrônica de Potência (SOBRAEP) |
| Repository: | Eletrônica de Potência (Online) |
| Language: | English |
| OAI Identifier: | oai:ojs2.journal.sobraep.org.br:article/1008 |
| Online Access: | https://journal.sobraep.org.br/index.php/rep/article/view/1008 |
| Access Level: | Open access |
| Keyword: | Current-fed half-bridge isolated regenerative active-clamped circuit zero current switching zero voltage switching |
| Summary: | This paper presents an isolated regenerative active-clamped circuit designed for the current-fed half-bridge (IRACCFHB) converter. Its primary function is to reduce high voltage spikes across the main switches caused by energy stored in the leakage inductance of the power transformer using a clamping capacitor. This recovered energy is delivered efficiently to the load, maintaining the converter's high efficiency and voltage ratio. The proposed auxiliary circuit employs a single active switch with the same ground reference as the main switches, eliminating the need for an isolated gate driver. The converter achieves zero voltage switching (ZVS) during the turn-off of the main switches and zero current switching (ZCS) during the turn-on of the auxiliary switch. Energy recovery to the load is accomplished without compromising galvanic isolation due to employing a coupled inductor in the auxiliary circuit. To validate the proposed analysis and design, a $350~\mathrm{W}$ prototype was implemented. |
|---|