Design of a new electrical model of a ferromagnetic planar inductor for its integration in a micro-converter

Melati, Rabia; Hamid, Azzedine; Lebey, Thierry; Derkaoui, Mokhtaria

doi:10.1016/j.mcm.2011.06.014

Cited by 26 publications

(18 citation statements)

References 10 publications

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“…The interspiral capacitance causes parallel resonances of the spiral inductor and it has influence on effective inductance at higher frequencies. The satisfactory estimation of the capacitance value is obtained with [21]…”

Section: Analytic Closed-form Expressions For Quasilumped Element Valuesmentioning

confidence: 99%

Design of Microwave Multibandpass Filters with Quasilumped Resonators

Miljanović¹,

Potrebić²,

Tošić³

2015

Mathematical Problems in Engineering

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Design of RF and microwave filters has always been the challenging engineering field. Modern filter design techniques involve the use of the three-dimensional electromagnetic (3D EM) solvers for predicting filter behavior, yielding the most accurate filter characteristics. However, the 3D EM simulations are time consuming. In this paper, we propose electric-circuit models, instead of 3D EM models, suitable for design of RF and microwave filters with quasilumped coupled resonators. Using the diakoptic approach, the 3D filter structure is decomposed into domains that are modeled by electric networks. The coupling between these domains is modeled by capacitors and coupled inductors. Furthermore, we relate the circuit-element values to the physical dimensions of the 3D filter structure. We propose the filter design procedure that is based on the circuit models and fast circuit-level simulations, yielding the element values from which the physical dimensions can be obtained. The obtained dimensions should be slightly refined for achieving the desired filter characteristics. The mathematical problems encountered in the procedure are solved by numerical and symbolic computations. The procedure is exemplified by designing a triple-bandpass filter and validated by measurements on the fabricated filter. The simulation and experimental results are in good agreement.

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Section: Analytic Closed-form Expressions For Quasilumped Element Valuesmentioning

confidence: 99%

Design of Microwave Multibandpass Filters with Quasilumped Resonators

Miljanović¹,

Potrebić²,

Tošić³

2015

Mathematical Problems in Engineering

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“…The work proposed by [12][13][14] in Figure 6 simplifies the electric diagram presented by [10], which shows the π model of a planar spiral inductor on a magnetic material. The different layers of the different materials superimposed and used in the manufacture of the integrated inductor are represented by the resistances and capacitances.…”

Section: Windings Modeling Of An Inductive Devicementioning

confidence: 99%

Modeling of Integrated Octagonal Planar Transformer for RF Systems

Derkaoui¹

2019

IJIMSE

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One of the important components in many RF ICs applications is the transformer. It is very important that transformer has optimal design, that means, optimal geometry with the best possible characteristics. Because of the wide transformer applications in radio-frequency silicon-based circuits, modeling for transformers has become more and more essential. The modeling of planar transformer for very high frequencies is the subject of this paper. Square, polygonal and circular shapes of the planar windings are the important difference regarding transformer topologies. In this work, comparison was restricted to a square and an octagonal shape of the windings. In this study, we opted for calculation method developed by Wheeler to evaluate the inductance of different planar geometrical shapes of transformer windings. Besides, we determined the geometrical parameters of the transformer and from its π-electrical model; we highlighted all parasitic effects generated by stacking of different material layers. By using the S-parameters, we calculated the technological parameters. The important characteristics of a transformer are its inductances values and its parasitic capacitances and resistances, which determine its Q factor and self-resonant frequency. Furthermore, we carried out the electromagnetic simulation using COMSOL Multiphysics 4.3 software to show current density and electromagnetic field in the windings of the transformer for high frequencies.

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“…At the heart of isolated converters, there is an essential element, the transformer. To overcome the problem of integration and reducing the size of the transformer, the planar components were introduced [3][4][5]. The transformer is an inductive component formed by a thin magnetic circuit, usually made of ferrite, on which conductive coils are deposited.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of an integrated octagonal planar transformer for RF systems

2020

Self Cite

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The work presented in this paper concerns the modeling of an integrated transformer in monolithic technology for high frequencies containing coils of planar type and magnetic circuit made of several layers of materials. Circular, square, and polygonal shapes of the planar coils are the important difference regarding transformer topologies. In this work, we have chosen the stacked octagonal form of coils. The transformer will be integrated into a converter of type flyback. We have opted for the Wheeler method and the S-parameters for determining the geometrical and the electrical parameters. The electrical π model presented summarizes perfectly the various parasitic effects generated by stacked layers of different materials constituting the transformer. The electromagnetic simulation, by using COMSOL Multiphysics 4.3 software, illustrates the current density and the distribution of magnetic field lines. We have also used software PSIM 6.0, to validate the equivalent electrical circuit of the transformer in flyback converter.

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Design of a new electrical model of a ferromagnetic planar inductor for its integration in a micro-converter

Cited by 26 publications

References 10 publications

Design of Microwave Multibandpass Filters with Quasilumped Resonators

Design of Microwave Multibandpass Filters with Quasilumped Resonators

Modeling of Integrated Octagonal Planar Transformer for RF Systems

Modeling and simulation of an integrated octagonal planar transformer for RF systems

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