A foil winding pulse transformer

H - Electricity – 01 – F

Patent

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Details

H01F 27/28 (2006.01) H01F 41/04 (2006.01)

Patent

CA 2622411

A pulse transformer arrangement (100) is built from an uncut pulse transformer core (110) and at least one foil winding (120-A, 120-B) (each) comprising multiple insulated conducting strips arranged around the core and ending in foil winding terminals to form multiple independent primary windings. This new design principle has several advantages. Making the winding(s) of foil eliminates the need to cut the core, because of the ease of insertion of the foil winding(s) onto the core. The work to set up a plurality of primary windings is significantly reduced. In addition to the elimination of the costs for cutting the core, this also brings the further advantages of reduced DC reset current, reduced risk for electrical shorts and avoidance of excessive losses due to potential high frequency AC resistance problems.

L'invention concerne un agencement de transformateur d'impulsions (100) qui est construit à partir d'un noyau de transformateur d'impulsions non découpé (110) et d'un ou plusieurs enroulements de feuille (120-A, 120-B) comprenant (chacun) de multiples bandes conductrices isolées agencées autour du noyau et se terminant par des terminaux d'enroulement de feuille permettant de former de multiples enroulements primaires indépendants. Le nouveau principe de conception de l'invention offre plusieurs avantages: en fabriquant le ou les enroulements dans une feuille, on élimine la nécessité de découper le noyau, car il est facile d'insérer le ou les enroulements de feuille dans le noyau, et l'on réduit ainsi le travail nécessaire à l'installation d'une pluralité d'enroulements primaires. Outre la suppression des coûts liés à la découpe du noyau, l'invention permet d'utiliser un courant de réarmement c.c. réduit, avec un risque réduit de courts-circuits électriques, et permet d'éviter les pertes excessives dues aux problèmes potentiels de résistance en c.a. haute fréquence.

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