Title:
METHOD AND APPARATUS FOR MANUFACTURING A VARIABLE INSULATED HELICALLY WOUND ELECTRICAL COIL
Document Type and Number:
WIPO Patent Application WO1999006310
Kind Code:
A3
Abstract:
A method and apparatus for manufacturing a variable insulated helically wound electrical coil (14) is disclosed. Insulated rectangular wire (32) is fed from a supply reel (30) to a coating zone (34) and within the coating zone liquid resin insulation is selectively applied to the wire so it has additional insulation only in those areas of the coil (14) where the dielectric strength is needed. The insulated wire is fed through a curing station (36) to allow curing of the additional insulation prior to winding the cured insulated wire into a coil (14). The cured insulated wire is wound into a coil of predetermined shape at a winding station (40) whereby the portions of the wire having the additional insulatin are located in the areas of the coil (14) where the greatest dielectric strength is needed. The timing of the resin application to the wire is coordinated with the winding of the coil (14) so that the proper insulation thicknesses are achieved at the required locations in the coil (14).
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Inventors:
HILL NORRIS L
LINSENBARDT THOMAS L
LINSENBARDT THOMAS L
Application Number:
PCT/US1998/015980
Publication Date:
August 03, 2000
Filing Date:
August 03, 1998
Export Citation:
Assignee:
ABB POWER T & D CO (US)
International Classes:
H01F41/06; H01F41/12; (IPC1-7): H01F7/06; B65H1/00; H01F27/30
Foreign References:
| US4554730A | 1985-11-26 |
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