LAPSE:2018.0603
Published Article
LAPSE:2018.0603
Design and Prototyping Medium-Frequency Transformers Featuring a Nanocrystalline Core for DC⁻DC Converters
Dante Ruiz-Robles, Vicente Venegas-Rebollar, Adolfo Anaya-Ruiz, Edgar L. Moreno-Goytia, Juan R. Rodríguez-Rodríguez
September 21, 2018
Medium frequency transformers (MFTs) are a key component of DC⁻DC dual active bridge (DAB)-type converters. These technologies are becoming a quintessential part of renewable energy solutions, such as photovoltaic systems and wind energy power plants, as well as in modern power grid interfaces functioning as solid-state transformers in smart-grid environments. The weight and physical dimensions of an MFT are key data for the design of these devices. The size of an MFT is reduced by increasing its operating frequency. This reduction implicates higher power density through the transformer windings, as well as other design requirements distinct to those used for conventional 60/50 Hz transformers; therefore, new MFT design procedures are needed. This paper introduces a novel methodology for designing MFTs, using nanocrystalline cores, and tests it using an MFT⁻DAB lab prototype. Different to other MFT design procedures, this new design approach uses a modified version of the area-product technique, which consists of smartly modifying the core losses computation, and includes nanocrystalline cores. The core losses computation is supported by a full analysis of the dispersion inductance. For purposes of validation, a model MFT connected to a DAB converter is simulated in Matlab-Simulink (The MathWorks, v2014a, Mexico City, Mexico). In addition, a MFT⁻DAB lab prototype (1 kVA at 5 kHz) is implemented to experimentally probe further the validity of the methodology just proposed. These results demonstrate that the analytic calculations results match those obtained from simulations and lab experiments. In all cases, the efficiency of the MFT is greater than 99%.
Keywords
DAB, design methodology, medium frequency transformer, nanocrystalline core
Subject
Suggested Citation
Ruiz-Robles D, Venegas-Rebollar V, Anaya-Ruiz A, Moreno-Goytia EL, Rodríguez-Rodríguez JR. Design and Prototyping Medium-Frequency Transformers Featuring a Nanocrystalline Core for DC⁻DC Converters. (2018). LAPSE:2018.0603
Author Affiliations
Ruiz-Robles D: Graduate Program and Research in Electrical Engineering (PGIIE), Instituto Tecnológico de Morelia, Morelia 58120, Mexico
Venegas-Rebollar V: Graduate Program and Research in Electrical Engineering (PGIIE), Instituto Tecnológico de Morelia, Morelia 58120, Mexico
Anaya-Ruiz A: Graduate Program and Research in Electrical Engineering (PGIIE), Instituto Tecnológico de Morelia, Morelia 58120, Mexico
Moreno-Goytia EL: Graduate Program and Research in Electrical Engineering (PGIIE), Instituto Tecnológico de Morelia, Morelia 58120, Mexico
Rodríguez-Rodríguez JR: Energía Eléctrica, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
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Journal Name
Energies
Volume
11
Issue
8
Article Number
E2081
Year
2018
Publication Date
2018-08-10
Published Version
ISSN
1996-1073
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Original Submission
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PII: en11082081, Publication Type: Journal Article
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LAPSE:2018.0603
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doi:10.3390/en11082081
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Sep 21, 2018
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Sep 21, 2018
 
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Calvin Tsay
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