Current Control of Interleaved DC-DC Converter Considering a Current Dependent Inductance

Lopez, Mario; Perez, Marcelo A.; Kaura, Samir; Rojas, Christian A.; IEEE

Abstract

Inductors with soft saturation cores built on compressed iron powder have higher saturation flux densities in comparison to ferrite gapped inductors, exhibiting a gradual drop of permeability for increasing magnetic field strength. This behavior yields to a gradual drop of differential inductance for increasing current, which avoids sudden core saturation and overcurrent produced in hard saturation cores as the inductance plummets when the maximum flux density is reached. However, the inductance in soft saturation cores starts dropping in the wide range of nominal current operation, increasing the complexity of the converter model and the control scheme. In this work, an interleaved dc-dc converter for supercapacitor management is modeled in continuous and discontinuous conduction mode, considering an inductor core with a linear drop in the differential inductance. A suitable current control strategy is proposed. Analysis of the model is given and simulated results that confirm the performance of the proposed control strategy are shown.

Más información

Título según WOS: Current Control of Interleaved DC-DC Converter Considering a Current Dependent Inductance
Título de la Revista: IECON 2021 - 47TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
Editorial: IEEE
Fecha de publicación: 2019
Página de inicio: 5927
Página final: 5932
DOI:

10.1109/IECON.2019.8927786

Notas: ISI