Non-linear thermal model of planar transformers

Górecki, Krzysztof; Górski, Krzysztof

doi:10.23919/empc.2017.8346913

Cited by 7 publications

(5 citation statements)

References 18 publications

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“…This model was also used in [58] to study a 1 MHz PCB planar transformer. Improved versions of this CTM were proposed in [59] and [60] as presented in Fig. 19.…”

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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“…This model was also used in [58] to study a 1 MHz PCB planar transformer. Improved versions of this CTM were proposed in [59] and [60] as presented in Fig. 19.…”

Section: ) Compact Thermal Networkmentioning

confidence: 99%

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

2023

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“…The nonlinear thermal model of the transformer worked out by the authors has the form of a subcircuit dedicated for SPICE. This form is inspired by the linear thermal model of a planar transformer proposed in [19] and by the nonlinear thermal model of semiconductor devices described in [37,40]. In the new model, the differences in the temperatures of components in the transformer (the core and all the windings) are taken into account.…”

Section: Proposed Nonlinear Thermal Model Of Pulse Transformersmentioning

confidence: 99%

“…It is widely known [7,15,16,[34][35][36] that some factors, such as ambient temperature, cooling systems or power dissipated in electronic devices, influence the efficiency of heat removal from the devices. Reference [37] presents a nonlinear thermal model of a planar transformer. In this model, the influence of power dissipated in particular components of the transformer on the efficiency of heat removal is taken into account.…”

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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“…There are many works focusing on the mathematical modelling of thermal properties for planar transformers. Publication [14] presents a model of the thermal properties of a planar transformer, while publication [15] presents a non-linear mathematical model for a planar transformer. In the case of paper [16], the authors present a method for determining power losses using a thermal imaging camera.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of DC/DC electric vehicle charging system with conventional transformer and planar transformer

2024

Archives of Electrical Engineering

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This paper presents an analysis of electric vehicle charging station operation based on a dual active bridge topology. Two cases are considered: one with the use of a medium frequency planar transformer, the other with a conventional Litz winding transformer. An analysis was performed using both solutions in order to compare the performance characteristics of the system for both cases and to present the differences between each transformer solution. The analysis was based on tests carried out on the full-scale model of an electric vehicle charging station, which is the result of the project "Electric vehicle charging system integrated with lighting infrastructure" realized by the Department of Drives and Electrical Machines, Lublin University of Technology. The results presented in the paper show that the conventional transformer used in the research achieved better results than the planar transformer. Based on the results obtained, the validity of using both solutions in electric vehicle charging stations was considered.

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Non-linear thermal model of planar transformers

Cited by 7 publications

References 18 publications

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

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

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

Comparative study of DC/DC electric vehicle charging system with conventional transformer and planar transformer

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