Inductance coil for electric power grids with reduced sound...

H - Electricity – 01 – F

Patent

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Details

H01F 27/30 (2006.01) H01F 27/33 (2006.01) H01F 37/00 (2006.01)

Patent

CA 2729020

The invention relates to an inductance coil, in particular an inductance coil without an iron core for use in electric power grids, comprising at least two cylindrical winding layers (1), which are disposed concentrically with respect to a coil central axis (7) and are connected electrically in parallel. Said inductance coil comprises at least one means for reducing or minimising sound emissions produced during the operation of the inductance coil. At least the outermost winding layer (1) is designed in this case as a current-conducting, acoustic shield winding (18) opposite the winding layer (1) adjacent in the direction of the coil central axis (7), wherein said shield winding (18) is dimensioned electrically such that it is designed for the transmission of a current intensity, which is only a fraction of the current intensity, to be transmitted by the adjacent winding layer (1). Furthermore, the invention relates to a bracketlike holding element arranged on at least one end face of the inductance coil for reducing sound emissions.

L'invention concerne une bobine d'arrêt, en particulier une bobine d'arrêt sans noyau de fer en vue d'une utilisation dans des réseaux de distribution d'énergie électrique, avec au moins deux couches bobinées (1) cylindriques, disposées concentriquement par rapport à un axe central de la bobine (7) et montées électriquement en parallèle. Cette bobine d'arrêt comprend au moins un moyen destiné à réduire ou à minimiser les émissions sonores produites pendant le fonctionnement de la bobine d'arrêt. Au moins la couche bobinée extérieure (1) est configurée comme bobinage conducteur de blindage acoustique (18) pour la couche bobinée (1) adjacente dans la direction de l'axe central de la bobine (7). Ce bobinage de blindage (18) est dimensionné électriquement de manière à être en mesure de transmettre une intensité qui n'est qu'une fraction de l'intensité qui doit être transmise par la couche bobinée (1) adjacente. L'invention concerne en outre un élément de maintien en forme d'arceau disposé à au moins une extrémité frontale de la bobine d'arrêt et destiné à réduire les émissions sonores.

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