Analysis and Design Guidelines of the Isolated Modular Multilevel DC-DC Converter With the Impact of Magnetizing Inductance

Mahmoud Mehrabankhomartash; Shiyuan Yin; Rajendra Prasad Kandula; Deepak Divan; Maryam Saeedifard

doi:10.1109/TIE.2023.3236111

Analysis and Design Guidelines of the Isolated Modular Multilevel DC-DC Converter With the Impact of Magnetizing Inductance

Mahmoud Mehrabankhomartash, Shiyuan Yin, Rajendra Prasad Kandula, Deepak Divan, Maryam Saeedifard

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The isolated modular multilevel dc-dc (IMM dc-dc) converter is one of the potential candidates for interconnection of medium- and high- voltage dc grids. One of the key components for realization of the IMM dc-dc converter is its transformer whose magnetizing inductance depends on the core material, dimensions, and airgap. Depending on the transformer design, the magnetizing inductance may vary over a wide range, adding to the complexity of the converter design. In this article, the impact of the magnetizing inductance on the converter real and reactive powers, transformer primary and secondary side currents, arm current, differential-mode current, capacitor voltage ripple, and soft-switching operation is investigated. The presented analysis is validated by a time-domain simulation in the MATLAB/Simulink software environment and experiments on a scaled-down prototype.

Original language	English
Pages (from-to)	11911-11922
Number of pages	12
Journal	IEEE Transactions on Industrial Electronics
Volume	70
Issue number	12
DOIs	https://doi.org/10.1109/TIE.2023.3236111
State	Published - Dec 1 2023
Externally published	Yes

Funding

This work was supported by the National Science Foundation (NSF) agency as a part of the Early-concept Grants for Exploratory Research (EAGER) program under Grant 1937746.

Keywords

DC grids
isolated modular multilevel dc-dc (IMM dc-dc) converter
magnetizing inductance

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10.1109/TIE.2023.3236111

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abstract = "The isolated modular multilevel dc-dc (IMM dc-dc) converter is one of the potential candidates for interconnection of medium- and high- voltage dc grids. One of the key components for realization of the IMM dc-dc converter is its transformer whose magnetizing inductance depends on the core material, dimensions, and airgap. Depending on the transformer design, the magnetizing inductance may vary over a wide range, adding to the complexity of the converter design. In this article, the impact of the magnetizing inductance on the converter real and reactive powers, transformer primary and secondary side currents, arm current, differential-mode current, capacitor voltage ripple, and soft-switching operation is investigated. The presented analysis is validated by a time-domain simulation in the MATLAB/Simulink software environment and experiments on a scaled-down prototype.",

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AU - Divan, Deepak

AU - Saeedifard, Maryam

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Analysis and Design Guidelines of the Isolated Modular Multilevel DC-DC Converter With the Impact of Magnetizing Inductance

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