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  • Numerical Computation and Design Verification of Integrated Magnetics Used in Linear Level Control Converters

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    Author(s)
    Water, Wayne
    Lu, Junwei
    Dawson, Francis
    Griffith University Author(s)
    Lu, Junwei
    Water, Wayne
    Year published
    2014
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    Abstract
    In this paper a novel structure of a 1.08 kW planar Linear Level Control (LLC) transformer with magnetic integration is evaluated by using the Finite Element Method (FEM) based numerical modeling techniques. The developed planar LLC transformer has a number of advantages and it is suitable for use in the LLC resonant converter. The most significant advantage of the LLC transformer is that it adjusts the resonant inductance more effectively by changing the air-gap between the magnetic insertion and the transformer core. Compared to the conventional integrated transformers, the developed LLC transformer cannot only adjust the ...
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    In this paper a novel structure of a 1.08 kW planar Linear Level Control (LLC) transformer with magnetic integration is evaluated by using the Finite Element Method (FEM) based numerical modeling techniques. The developed planar LLC transformer has a number of advantages and it is suitable for use in the LLC resonant converter. The most significant advantage of the LLC transformer is that it adjusts the resonant inductance more effectively by changing the air-gap between the magnetic insertion and the transformer core. Compared to the conventional integrated transformers, the developed LLC transformer cannot only adjust the resonant inductance easily, but also achieves a 30% reduction in volume. To evaluate the performance of the LLC transformer, two prototype transformers (one is the proposed structure and the other is the conventional Top Up structure) have been fabricated and tested. FEM numerical modeling techniques are employed to solve the 3-Dimensional (3-D) quasi-static magnetic field problems and investigate the power losses, eddy current and magnetic flux distributions in high frequency. The numerical simulation results are consistent with the measurements. Furthermore, a sectorization technique of windings is also introduced to relieve the redundant computation process of the 3D analysis.
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    Conference Title
    The Sixteenth Biennial IEEE Conference on Electromagnetic Field Computation 2014
    DOI
    https://doi.org/10.1109/TMAG.2015.2407236
    Copyright Statement
    © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subject
    Power and Energy Systems Engineering (excl. Renewable Power)
    Physical Sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/95137
    Collection
    • Conference outputs

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