Modified Active-Clamped Current-Fed DC–DC Push–Pull Converter

Eldin Mario Miranda-Terán, Fernando Lessa Tofoli, Grover Victor Torrico Bascopé and Rene Pastor Torrico Bascopé ()
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Eldin Mario Miranda-Terán: Department of Electrical Engineering, Federal University of Ceará, Fortaleza 60020-181, Brazil
Fernando Lessa Tofoli: Department of Electrical Engineering, Federal University of São João del-Rei, São João del-Rei 36307-352, Brazil
Grover Victor Torrico Bascopé: Huawei Sweden Technologies AB, 164 94 Kista, Sweden
Rene Pastor Torrico Bascopé: Department of Electrical Engineering, Federal University of Ceará, Fortaleza 60020-181, Brazil

Energies, 2023, vol. 16, issue 17, 1-20

Abstract: This work presents a modified version of the current-fed dc–dc push–pull converter associated with an active clamping circuit for mitigating voltage spikes on the primary-side switches. Unlike the traditional push–pull topology, saturation due to asymmetrical gating signals applied to the active switches is not likely to occur in the high-frequency transformer because the converter allows for connecting a blocking capacitor in series with the primary winding. In addition, the leakage inductance will not cause high voltage spikes on the primary-side semiconductors owing to the clamping capacitors. Since all active switches operate under the zero-voltage switching (ZVS) condition, one can obtain a high efficiency over a wide load range when comparing the structure with its hard-switching counterpart. Experimental results obtained from a laboratory prototype rated at 1 kW are presented and discussed to validate the theoretical claims.

Keywords: active clamping; dc–dc converters; galvanic isolation; push–pull converter; three-state switching cell (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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