Electrical transformers with improved insulation and coolant guiding
AssigneeSociete Nouvelle Transfix
InventorJean-Claude Beisser
Life of this patent
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Abstract
Each end of an insulating tube which surrounds a transformer core projects beyond the electric circuits carried by the tube and is associated with an annular spacer member having two radially displaced bearing surfaces applied respectively against the core and the tube. An axial slit formed in the insulating tube is opened-out in order to insert the transformer core within the tube and then re-closed. A driving wheel is removably coupled to the tube in order to drive it in rotation during the winding operation.
Claims19
An electric transformer having a magnetic frame provided with at least one yoke and at least one core which define together at least one substantially rectangular window, at least one high-voltage electric winding and at least one low-voltage electric winding being placed around an insulating tube and said tube being in turn placed around the magnetic core which is associated with said tube, a gap being provided between said tube and said core, wherein each end of the insulating tube extends axially beyond the electric windings carried thereon, wherein an annular spacer member is inserted between each annular extremity of the electric windings and the yoke and is provided opposite the magnetic core on the one hand with a first bearing surface located axially beyond the insulating tube and engaging the core in a centering relationship therewith and on the other hand with a second bearing surface located axially nearer to the windings than the first bearing surface and engaging the adjacent end of the insulating tube in a centering relationship therewith.
An electric transformer having a magnetic frame provided with at least one yoke and at least one core which define together at least one substantially rectangular window, at least one high-voltage electric winding and at least low-voltage electric winding being placed around an insulating tube and said tube being in turn placed around the magnetic core which is associated with said tube, a gap being provided between said tube and said core, wherein each end of the insulating tube is connected in a centering relationship with an annular member inserted between the windings and the yoke, and provided opposite the magnetic core with a first bearing surface axially limiting the gap and engaging the core in a centering relationship therewith, wherein the annular members are provided with ducts connecting their outer periphery with the gap between the tube and the core.
Dependencies are inferred from the claim text.