Thermal Coupling and Network Modeling for Planar Transformers

Shen, Zhan; Shen, Yanfeng; Liu, Bochen; Wang, Huai

doi:10.1109/ecce.2018.8558235

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…Another CTM was applied to a multiple-winding planar transformer [62]. To build the model, one node is placed in each winding with a current source representing the copper losses as shown in Fig.…”

Section: ) Compact Thermal Networkmentioning

confidence: 99%

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

2023

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High-frequency and high-power density converters are essential for many applications such as automotive and more electric aircraft. To improve power density, planar magnetic components are increasingly used in power electronic converters owing to their advantages, such as less high-frequency losses, repeatability, and better thermal performance compared to conventional wound components. Considerable attention has been paid to their electrical performance. However, the thermal aspects are essential for enhancing completely their performance. Currently, there is an increasing interest in these critical aspects of high-density power converters. This paper presents a literature review of studies on the thermal modeling of planar magnetics. The papers were organized according to the model type and analyzed to highlight their merits and limitations. A multicriteria comparison of the studied papers was performed. Moreover, the key points and issues related to the thermal modeling are addressed to guide designers in enhancing the thermal aspects of planar magnetic components.INDEX TERMS Planar magnetics, High frequency magnetics, Thermal modeling, high power density.

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Section: ) Compact Thermal Networkmentioning

confidence: 99%

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

2023

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“…In order to predict the temperature distribution of each component and provide the basis for high reliability, the thermal network modeling of planar transformers is essential [13]. The analysis of temperature modeling requires knowledge of transformer structures, power loss models and temperature points of interest [14,15]. In [16], a thermal model of the transformer considering multi-physics coupling is proposed.…”

Section: Introductionmentioning

confidence: 99%

The Modeling and Simplification of a Thermal Model of a Planar Transformer Based on Internal Power Loss

Shen

Liu

et al. 2022

Sustainability

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With the development of high-performance wide-band-gap devices and increasing converter frequency, planar transformers are widely used in high-frequency and high-power-density power conversions. Due to the skin effect and proximity effect, accurate thermal analysis and a simplified thermal model of planar transformers are needed for quick thermal verification as well as system design. This paper proposes two thermal simplification models based on the planar transformer’s thermal impedance network. The internal power loss and thermal coupling between each component are first analyzed. Then, based on thermal radiation theory, the simplified thermal model of the planar transformer is presented. It only requires the input of the total power loss of the planar transformer to calculate the temperature rise, and it does not need the power loss of each component. Finally, the simulation and experimental verification are carried out on a MHz prototype.

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“…Reference [32] presents a thermal model of a planar transformer. The form of this model is obtained on the basis of computation fluid dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…The structure of this model is adequate for planar transformers only. Unfortunately, in the paper [32], no results of experimental verification of this model are presented.…”

Section: Introductionmentioning

confidence: 99%

Compact Thermal Model of the Pulse Transformer Taking into Account Nonlinearity of Heat Transfer

Górecki

Detka

Górski³

2020

Energies

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This paper presents a compact nonlinear thermal model of pulse transformers. The proposed model takes into account differentiation in values of the temperatures of a ferromagnetic core and each winding. The model is formulated in the form of an electric network realising electrothermal analogy. It consists of current sources representing power dissipated in the core and in each of the windings, capacitors representing thermal capacitances and controlled current sources modelling the influence of dissipated power on the thermal resistances in the proposed model. Both self-heating phenomena in each component of the transformer and mutual thermal couplings between each pair of these components are taken into account. A description of the elaborated model is presented, and the process to estimate the model parameters is proposed. The proposed model was verified experimentally for different transformers. Good agreement between the calculated and measured waveforms of each component temperature of the tested pulse transformers was obtained. Differences between the results of measurements and calculations did not exceed 9% for transformers with a toroidal core and 13% for planar transformers.

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Thermal Coupling and Network Modeling for Planar Transformers

Cited by 8 publications

References 18 publications

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

Thermal Modeling of Planar Magnetics: Fundamentals, Review and Key Points

The Modeling and Simplification of a Thermal Model of a Planar Transformer Based on Internal Power Loss

Compact Thermal Model of the Pulse Transformer Taking into Account Nonlinearity of Heat Transfer

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