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Communication Dans Un Congrès Année : 2018

Practical model of the axial magnetic field in the end region of large turbo-generators

Résumé

Purpose The axial magnetic field occurs in the end-region of large turbo-generators is known to induce hot points or voltages between laminations, that may cause insulation breakdown and thus stator faults. Design/methodology/approach It is important to dispose of simple methods for estimating the axial flux rapidly with regard to the operating point of the machine. Findings The authors provide a practical model of the axial magnetic field based on a simplified vector diagram. The parameters required to build the vector composition of the flux densities are assessed with a limited number of finite element method simulations of the whole end-region of the machine. These simulations were validated by an experimental test on a real turbo-generator. Then the axial flux density was simply estimated for various operating points. Originality/value The originality of the paper concerns the practical model of the axial magnetic field based on a simplified vector diagram.
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Dates et versions

hal-04297011 , version 1 (21-11-2023)

Identifiants

  • HAL Id : hal-04297011 , version 1

Citer

Cristian Demian, Raphael Romary, Gilles Vogt, Costan Valentin. Practical model of the axial magnetic field in the end region of large turbo-generators. Symposium on Electromagnetic Phenomena in Nonlinear Circuits – EPNC, Jun 2018, Arras, France. ⟨hal-04297011⟩
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