Transformer core with magnetic screening

Details Transformer core with magnetic screening Transformer core with magnetic screening

H - Electricity

01

F

H01F 27/36 (2006.01)

Patent

CA 2597934

The invention relates to a transformer core comprising a core interior consisting of a magnetisable material. Magnetic leakage fluxes create eddy currents in the outer core regions, which lead to power losses and local overheating. Said leakage fluxes are channelled and conducted away from the outer region of the core interior by shielding, which partially encompasses the core interior and consists of at least one layered magnetisable material. This permits the formation of eddy currents in the core interior to be significantly reduced and thus prevents local overheating of the transformer core and power losses.

L'invention concerne un noyau de transformateur comportant un intérieur de noyau réalisé en matériau magnétisable. Des flux de dispersion magnétiques produisent des courants parasites dans les parties extérieures du noyau, provoquant des pertes de puissance et des échauffements locaux élevés. Un blindage entourant partiellement l'intérieur du noyau, réalisé dans au moins un matériau magnétisable en couches, permet de canaliser les flux de dispersion et de les évacuer de la partie extérieure de l'intérieur du noyau. Ceci permet de réduire considérablement la formation de courants parasites à l'intérieur du noyau et d'empêcher des échauffements locaux élevés et des pertes de puissance.

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