Publication

Self-field and geometry effects in transport current applications of multifilamentary Bi-2223/Ag conductors

Bertrand Dutoit, Svetlomir Stavrev
2003
Journal Articles

Abstract

This paper describes quantitatively the influence of the self-field and the cross-sectional geometry on the effective critical current and the ac losses in transport current applications of non-twisted multifilamentary Bi-2223/Ag conductors. The results are obtained with finite element method simulations. The numerical implementation includes an anisotropic model for the dependence of the critical current density Jc and the power index n on the local parallel and perpendicular magnetic field components. The relation is given between the intrinsic critical current density and the effective critical current for different multifilamentary conductors. Shown are examples of the current and magnetic flux density distributions in order to demonstrate their effect on the ac losses in self-field

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https://infoscience.epfl.ch/entities/publication/40a860a9-1711-4f61-bf7e-51c7711b558d

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Bertrand Dutoit, Svetlomir Stavrev
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/40a860a9-1711-4f61-bf7e-51c7711b558d

About this result

Related concepts (32)

Magnetic field

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets.

Current density

In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the positive charges at this point. In SI base units, the electric current density is measured in amperes per square metre. Assume that A (SI unit: m2) is a small surface centred at a given point M and orthogonal to the motion of the charges at M.

Numerical analysis

Numerical analysis is the study of algorithms that use numerical approximation (as opposed to symbolic manipulations) for the problems of mathematical analysis (as distinguished from discrete mathematics). It is the study of numerical methods that attempt at finding approximate solutions of problems rather than the exact ones. Numerical analysis finds application in all fields of engineering and the physical sciences, and in the 21st century also the life and social sciences, medicine, business and even the arts.

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Self-field and geometry effects in transport current applications of multifilamentary Bi-2223/Ag conductors

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