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Simulation of the magnetic field in electric machines by the finite element method under FEMM 4.2: case of a definition of short-circuit defect between spiers

Author Affiliations

  • 1Departement of Electrical Engineering, Ecole Nationale Supérieure d'Ingénieurs (ENSI), Université de LOME, TOGO
  • 2Departement of Electrical Engineering, Ecole Nationale Supérieure d'Ingénieurs (ENSI), Université de LOME, TOGO
  • 3Departement of Electrical Engineering, Ecole Nationale Supérieure d'Ingénieurs (ENSI), Université de LOME, TOGO
  • 4Departement of Electrical Engineering, Ecole Nationale Supérieure d'Ingénieurs (ENSI), Université de LOME, TOGO

Res. J. Engineering Sci., Volume 7, Issue (11), Pages 30-39, December,26 (2018)

Abstract

Electrical machines are the main production tools in almost all industrial installations. The major challenges to be overcome for a good continuity of operation of industrial production consist in a thorough knowledge of these machines. Two fundamental problems to be solved by researchers and engineers are the analysis of the characteristics of an existing system and to design another type that will meet a specific need for the improvement of the condition of the machines used in the industrial process. To study any physical system one needs to do a modeling. This will allow engineers to simulate the behavior of the latter who would be exposed to various demands and to deduce the mechanisms that govern its operation. Three methods are often used during this modeling: i. analytical method, ii. semi-numerical method, iii. numerical method: Numerical methods consume a lot of time for calculation. They are based on a computer calculation mode that discretizes the models into elements of rectangular shapes with a Taylor approximation (Finite Difference Method). On the other hand triangular shapes are used with integral formulation or minimization related to stored energy (Finite Element Method). In this article we chose the Finite Element method to design models of electrical machines dedicated to the diagnosis, that is to say healthy operating models and also operating models in the presence of defects. Indeed, it is the short-circuit faults between turns in the asynchronous machines that are taken as an example.

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