Optimum design approach of high frequency transformer

Barg, Sobhi; Ammous, Kaiçar; Mejbri, Hanen; Alahdal, Abdulrahman; Ammous, Anis

doi:10.1109/apemc.2016.7522796

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…It also includes the Steinmetz parameters, characterizing the core loss of the magnetic materials. This feature offers the possibility to consider the effect of the magnetic material loss in the design process, and therefore the selection of the best material becomes achievable [37].…”

Section: Single-objective Methodsmentioning

confidence: 99%

Multi-objective Pareto and GAs nonlinear optimization approach for flyback transformer

Barg

Bertilsson

2019

Electr Eng

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Design and optimization of high-frequency inductive components is a complex task because of the huge number of variables to manipulate, the strong interdependence and the interaction between variables, the nonlinear variation of some design variables as well as the problem nonlinearity. This paper proposes a multi-objective design methodology of a 200-W flyback transformer in continuous conduction mode using genetic algorithms and Pareto optimality concept. The objective is to minimize loss, volume and cost of the transformer. Design variables such as the duty cycle, the winding configuration and the core shape, which have great effects on the former objectives but were neglected in previous works, are considered in this paper. The optimization is performed in discrete research space at different switching frequencies. In total, 24 magnetic materials, 6 core shapes and 2 winding configurations are considered in the database. Accurate volume and cost models are also developed to deal with the optimization in the discrete research space. The bi-objective (loss-volume) and tri-objective (loss-volume-cost) optimization results are presented, and the variations of the design variables are analyzed for the case of 60 kHz. An example of a design (30 kHz) is experimentally verified. The registered efficiency is 88% at full load.

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Section: Single-objective Methodsmentioning

confidence: 99%

Multi-objective Pareto and GAs nonlinear optimization approach for flyback transformer

Barg

Bertilsson

2019

Electr Eng

Self Cite

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“…Therefore, a solution of an optimal Rmag by optimizing f or B is not possible. Several design methods have been published in the literature to minimize the core loss such as the area product, the core geometry coefficient and the works published in [36][37]. These design methods show that there exist an optimal B and an optimal f for given design.…”

Section: E Rmag Optimizationmentioning

confidence: 99%

Core Loss Modeling: Review and a New Approach Based on the Concept of Magnetic-flux resistance and the Square Law

Barg,

Bertilsson

2023

Preprint

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“…The left-hand side of (10) belongs to the parameters of the core geometry, while the right-hand side represents the specifications of the intended application as well as the parameters of the core material. As given in [20] and used in [26], the lefthand side of this equation can be termed as geometrical constant K gfe , which represents the minimum value of the affective dimensions of the core for the intended application, i.e.…”

Section: A Selection Of Core Sizementioning

confidence: 99%

Modeling and Characterization of Series Connected Hybrid Transformers for Low-Profile Power Converters

2020

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Compact and low profile power converters are the main business of today's power industry. A significant volume of a power converter is occupied by the power transformer. This article proposes a unique solution that would make the power converters low profile. Instead of designing a power converter by using a single bulky transformer, the solution proposed is to split the main bulky transformer into a number of low profile transformers. This not only reduces the total weight and volume of the converter but also the total transformer losses. The use of more than one transformer in series reduces the applied voltage on the transformers, which minimizes the required turns ratio and decreases the stress on the secondary rectifiers and filter elements. Moreover, the decrease in the applied voltage reduces the proportional loss per transformer and makes it possible to design a hybrid transformer by combining Litz wire and traces of a printed circuit board. The reduced copper loss and lower heat dissipation per transformer simplify thermal management. An analytical comparison is made between the utilization of a single transformer or a number of transformers. The procedure of splitting a volume of a single transformer into a number of small transformers has been comprehensively discussed. The idea is investigated both experimentally and in computer simulation for an example application of a phase shifted full bridge dc-dc converter. The converter is characterized up to a load power of 2.2 kW at V in = 400 V dc and V out = 48 V dc .To make the approach more practical, the transformers are modeled using the traditional analytical method. The design of the example application using the split transformer approach reduces the total transformer weight by 45%, compared to the traditional approach with a single transformer. The converter also shows good performance with a maximum efficiency of 96%. INDEX TERMS Series transformers, modeling of transformers, transformer design, isolated converter, medium power converter, low profile converter, ZVS converter, PSFB converter, lightweight converter.

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Optimum design approach of high frequency transformer

Cited by 7 publications

References 11 publications

Multi-objective Pareto and GAs nonlinear optimization approach for flyback transformer

Multi-objective Pareto and GAs nonlinear optimization approach for flyback transformer

Core Loss Modeling: Review and a New Approach Based on the Concept of Magnetic-flux resistance and the Square Law

Modeling and Characterization of Series Connected Hybrid Transformers for Low-Profile Power Converters

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