Evaluation of Transformer Leakage Inductance Using Magnetic Image Method

Sharma, Angshuman; Kimball, Jonathan W.

doi:10.1109/tmag.2021.3111479

Evaluation of Transformer Leakage Inductance Using Magnetic Image Method

Journal Article · Thu Sep 09 00:00:00 EDT 2021 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/tmag.2021.3111479· OSTI ID:1991831

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Missouri University of Science and Technology, Rolla, MO (United States); Missouri University of Science and Technology
Missouri University of Science and Technology, Rolla, MO (United States)

Leakage inductance is a critical design element of a transformer in a galvanically isolated power converter. For multi-objective optimization-based designs of power converters, analytical leakage inductance models that are computationally efficient and accurate are preferred over the Finite Element Methods (FEM). In this paper, three new analytical models are proposed—Triple-2D, Double- 2D, and Single-2D—that are formulated using the magnetic image method. These 2D models are used to calculate the leakage inductance of a partially filled shell-type transformer having a circular center leg, and the resulting errors are less than 1.25 % for each model when compared to the 3D FEM simulated value of the leakage inductance. Additionally, three different conductor models are considered, and their relative accuracies and computational efficiencies are investigated. Further, a variable inductance transformer (VIT) is designed, whose leakage inductance can be modified by moving one of the windings vertically along the central core leg. Here, the analytically evaluated variable leakage inductances of the VIT are in good agreement with the 3D FEM simulated and experimentally measured values.

View Accepted Manuscript (DOE)

Research Organization:: Missouri University of Science and Technology, Rolla, MO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)

Grant/Contract Number:: EE0008449

OSTI ID:: 1991831

Alternate ID(s):: OSTI ID: 1980526

Journal Information:: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 11 Vol. 57; ISSN 0018-9464

Publisher:: Institute of Electrical and Electronics Engineers. Magnetics GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Evaluation of Transformer Leakage Inductance Using Magnetic Image Method

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