Fast and Accurate Thermal Modeling of Magnetic Components by FEA-Based Homogenization

Salinas, Guillermo; Delgado, Alberto; Muñoz-Antón, Javier; Oliver, J. A.; Lopez, Roberto Prieto

doi:10.1109/tpel.2019.2921160

Cited by 27 publications

(10 citation statements)

References 16 publications

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“…To simplify the thermal calculation of ACT and ensure the high accuracy of temperature field, the homogenization model (Salinas López et al , 2020) is introduced to obtain the equivalent thermal conductivity k W of single-turn Litz wire: …”

Section: Results Analysis and Simulation Verificationmentioning

confidence: 99%

Design method for high-power high-frequency magnetic-resonance air-core transformer

Chen

Tao

Wan³

et al. 2023

COMPEL

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Purpose The purpose of this paper is to study the multi-objective optimization design method of high-power high-frequency magnetic-resonance air-core transformer (ACT). Design/methodology/approach First, this paper studies the interleaved winding technology, the process of modeling and simulation, the calculation method of high-frequency loss of Litz wire and the design of magnetic shielding in detail. Second, the multi-objective optimization design process of high-frequency magnetic-resonance ACT is established by parametric scanning method and orthogonal experiment method. Findings An ACT model of 2 kV/100 kW/81.34 kHz was designed. The efficiency, weight power density and volume power density are 99.61%, 21.6 kW/kg and 5.1 kW/kg, respectively. Finally, the multi-physical field coupling simulation method is used to calculate the port excitation voltages and currents and temperature field of ACT. The maximum temperature of the ACT is 95.5 °C, which meets the design requirements. Originality/value The above research provides guidance and basis for the optimization design of high-power high-frequency magnetic-resonance ACT.

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Section: Results Analysis and Simulation Verificationmentioning

confidence: 99%

Design method for high-power high-frequency magnetic-resonance air-core transformer

Chen

Tao

Wan³

et al. 2023

COMPEL

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“…where I winding layer is the current that needs to be inyected in that winding layer to simulate the effect of the produced heat in that winding, N layer is the total amount of turns of that winding in the layer including the ones of each parallel conductor, N winding is the total number of turns of the winding including the ones of all the parallel conductors used in it and Q winding is the heat produced in that winding (calculated as explained in Section 2.1). With regard to the power losses produced in the core (obtained as explained in Section 2.1), heat losses can be modelled as a set of current sources connected to each of the nodes of its thermal network, being the value of each current source described by Equation (16).…”

Section: Heat Injection In the Thermal Networkmentioning

confidence: 99%

“…However, the main disadvantages of this approach are that FEA tools are very computationally expensive, require certain expertise and they are not always available. The use of homogenization techniques is proposed in [16] to reduce the computational requirements without sacrificing the accuracy of the results, but the required time to solve each simulation is still considerably higher than solving the set of equations corresponding to a simple thermal network. Then, the aim of this paper is obtaining a fast and accurate thermal model valid for any input conditions, so that the temperature rise of the studied magnetic component can be obtained as accurately as FEA simulations while avoiding the corresponding time consumption and limitations.…”

Section: Introductionmentioning

confidence: 99%

Simplification of Thermal Networks for Magnetic Components in Space Power Electronics

et al. 2020

Self Cite

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The volume of magnetic components for space applications, directly related to the launch cost, and their performance are critically influenced by their capability to dissipate the internal electromagnetic power losses. This is the reason why accurate thermal models are required. Furthermore, these models need to be simple and versatile to allow a fast analysis of many different designs. In this study, a specific methodology to analyze inductors and transformers by thermal networks and a simplification based on the Thevenin’s theorem leading to a simple equation are proposed. The specific details to address thermal modelling for space magnetic components are discussed. A generic 50 W Flyback transformer for space applications is analyzed in this study and experimental validation is provided, showing that the proposed method leads to a deviation in the temperature estimation between 1 °C and 5 °C, which is considered quite a good result from the literature review carried out.

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“…Indeed, the trend of higher power density and smaller volume and weight leads to ever demanding thermal constraints. Particularly crucial is the characterization of multi-turn windings in inductors and transformers as, in high frequency, they may be subjected to considerable eddy-current effects leading to high losses, high temperature distribution, degradation of the insulation, deteriorated performance, and reduction of the life cycle [1].…”

Section: Introductionmentioning

confidence: 99%

“…However, they are restricted to particular conductor cross-sections and packings. Finite-element (FE) models provide the most accurate field distributions but quickly become computationally intractable, as the fine discretization of each separate turn (and insulation) leads to huge meshes (particularly in 3D) [1]. These high-fidelity models are thus not suitable for design and optimization.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electrothermal Homogenization for the Fast and Accurate Modeling of Windings in Power Electronics Magnetic Components

Sabariego,

Martinez,

Kuo-Peng

et al. 2024

IEEE Trans. Magn.

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This paper deals with the electro-thermal characterisation of multi-turn windings in the magnetic components of power electronics (PE) converters (inductors and transformers). The ever higher frequencies and smaller PE components demand the fast and accurate power loss computation for an optimal design accounting for severe electro-thermal constraints. Homogenisation techniques prove indispensable. Works on both electromagnetic and thermal homogenisation exist but mainly consider both physics independently. We aim at studying the interaction of the strongly coupled systems when applying homogenisation techniques. As test case, we consider a 2-D EI-planar inductor with two different multi-turn copper windings.

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Fast and Accurate Thermal Modeling of Magnetic Components by FEA-Based Homogenization

Cited by 27 publications

References 16 publications

Design method for high-power high-frequency magnetic-resonance air-core transformer

Design method for high-power high-frequency magnetic-resonance air-core transformer

Simplification of Thermal Networks for Magnetic Components in Space Power Electronics

Analysis of Electrothermal Homogenization for the Fast and Accurate Modeling of Windings in Power Electronics Magnetic Components

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