Re-tightenable strain block for generator end turn windings

Details Re-tightenable strain block for generator end turn windings Re-tightenable strain block for generator end turn windings

H - Electricity

02

K

310/108

H02K 3/50 (2006.01)

Patent

CA 2035989

ABSTRACT OF THE INVENTION Apparatus and method for securing end turn portion of coils 25 of an electric generator 10. A wedge-shaped strain block 49 is inserted between a pair of top 28 and bottom 31 stator end turn windings. Compres- sible fillers 58, impregnated with an insulating epoxy resin, are located between the top 52 and bottom 55 surfaces of the strain block 49 and each of the windings 28,31. The strain block 49 is driven inward to secure the windings, such that the fillers 58 are compressed to about 50% of their original thickness. A pair of top and bottom channels 61 help guide the block 49 as it is inserted. Glass fiber bands 46 are then looped through openings 64 in the side of the wedge and around either of the windings 28,31. If desired, the end turn windings can be re-tightened at a later time by removing the glass bands 46, driving in the strain block 49 further, and re- securing the wedge in place.

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