Open AccessGeneralised analysis of the high‐voltage‐gain interleaved ZVS boost‐flyback converter
Author(s) -
Gonçalves Pedro José Faure,
Agostini Eloi
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2019.1373
Subject(s) - interleaving , flyback converter , leakage inductance , buck–boost converter , flyback transformer , inductance , capacitance , voltage , electronic engineering , snubber , computer science , buck converter , boost converter , capacitor , electrical engineering , transformer , engineering , physics , electrode , quantum mechanics
This study proposes the generalised analysis of the interleaved zero‐voltage‐switching (ZVS) boost‐flyback converter containing a number k of interleaving cells. The analysis provides a general description of the energy transfer process of the circuit and yields a systematic approach for the adequate converter design. The effect of the leakage inductance on the voltage gain is verified in detail, enabling the designer to deal with the trade‐off between high step‐up operation and soft‐switching occurrence. In addition, the conditions to guarantee ZVS for all switches are investigated, providing the basis for the adequate choice of the auxiliary switching capacitance and dead time. Experimental results obtained from the testing of a 500 W, 100 kHz, 96.9% peak efficiency prototype validate the analysis carried out and the proposed design procedure for the converter.