Analytical Model for the Electrodynamical Forces inside Electrical Contacts of Commutation Devices

Popescu, Alexandra; Lazarescu, Emil; Frigura-Iliasa, Flaviu Mihai; Dolga, Lia; Filipescu, Hannelore; Anghel, Andrei

doi:10.1109/epe.2019.8778079

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…One can notice that the equipotential surfaces are also isothermal, due to the fact that equal thermal fluxes go through equal thermal resistances. Thus, the equations of electrical resistance R and thermal resistances Rt, for a segment of the current tube between the base surface ΔA0 and the equipotential surface ΔA1 situated at a distance d n from ΔA0 are: (23) where A 01 represents an average value of the area over the distance d n; σ is the electrical conductivity; λ is the thermal conductivity.…”

Section: The Thermal Regime Of Electrical Contactsmentioning

confidence: 99%

“…First, there are theoretical analyses based on model types such as the single point (or Holm tube) contact model [15,16], the multi-point contact model [17,18], or the fractal geometry theory model [19][20][21]. A number of several other scholars used analytical models to study electrical contact behavior with authors of [22] presenting a study built on the improved elastic rough surface model, [23] introducing a new analytical model for the analysis of switching devices contact area for different voltage and current magnitudes and [24] proposing a semi-analytical model based on the single asperity concept to highlight the flow of current between two contacting surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Andras,

Popescu,

Radu

et al. 2024

Preprint

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Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical contacts is a widely studied topic in scientific literature based on various approaches, tools, and techniques. The present study proposes a numerical modeling and simulation approach based on the Holm contact theory to study the dependence between the electric potential and the temperature within an electrical contact. Structured in 5 sections, the research was conducted using COMSOL Multiphysics software and its solid-state mechanics, electric current, and heat transfer modules in order to highlight contact behavior from mechanical, electrical and thermal points of view: the von Mises stress, contact force, the electric field amplitude, the variation of the electrical potential along the current path, the temperature gradient, and dependence of temperature along the contact elements edges were obtained by simulation and graphically represented. The results are in line with the expectations and with past research that was studied in the literature review.

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Section: The Thermal Regime Of Electrical Contactsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Andras,

Popescu,

Radu

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…First, there are theoretical analyses based on model types such as the single-point (or Holm tube) contact model [15,16], the multi-point contact model [17,18], and the fractal geometry theory model [19][20][21]. Several other scholars have used analytical models to study electrical contact behavior, with the authors of [22] presenting a study built on the improved elastic rough surface model, [23] introducing a new analytical model for the analysis of switching devices' contact areas for different voltage and current magnitudes, and [24] proposing a semi-analytical model based on the single asperity concept to highlight the flow of current between two contacting surfaces.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Andras,

Popescu,

Radu

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical contacts is a widely studied topic in the scientific literature based on various approaches, tools, and techniques. The present study proposes a new approach to numerical modeling and simulation based on the Holm contact theory, aiming to study the dependence between the electric potential and the temperature within an electrical contact. Structured in five sections, the research was conducted using COMSOL Multiphysics software and its solid-state mechanics, electric current, and heat transfer modules in order to highlight contact behavior from mechanical, electrical and thermal points of view: the von Mises stress, contact force, electric field amplitude, variation of the electrical potential along the current path, temperature gradient, and dependence of temperature along the contact elements edges were obtained by simulation, and are graphically represented. The results show that the temperature increase follows a parabolic curve, and that for values higher than 4 mV of voltage drop, the temperature of the contact increases to 79.25 degrees (and up to 123.81 degrees for 5 mV) over the ambient temperature, thus the integrity of insulation can be compromised. These values are close (10–12%) to the analytically calculated ones, and also in line with research assessed in the literature review.

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Analytical Model for the Electrodynamical Forces inside Electrical Contacts of Commutation Devices

Cited by 2 publications

References 4 publications

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics

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