Method of manufacturing a laminated coil to prevent...

Details Method of manufacturing a laminated coil to prevent... Method of manufacturing a laminated coil to prevent...

H - Electricity

01

F

H01F 41/02 (2006.01) H01F 27/26 (2006.01) H01F 27/32 (2006.01)

Patent

CA 2116808

ABSTRACT A dry type transformer has an iron core, high voltage windings embedded in cast resin, and low voltage windings resin encapsulated. The iron core is manufactured with stacked core steel. After the core is stacked,instead of using banding straps, a heat shrinkable material is wrapped around the core legs and is heated to enable the shrunken material to apply uniform compression over the core legs. This will facilitate coil loading, reduces audible core noise and reduce core losses. In place of shrink wrappable material, a film material with elastic properties could be used.

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