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End turn insulation for a dynamoelectric machine

  • US 4,588,916 A
  • Filed: 01/28/1985
  • Issued: 05/13/1986
  • Est. Priority Date: 01/28/1985
  • Status: Expired due to Fees
First Claim
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1. For a dynamoelectric machine having a slotted stator, a plurality of insulated stator windings supported by the stator slots such that winding end turns extending exteriorly of the stator from adjacent stator slots overlap before returning to different stator slots, such overlapping end turns being tied together with a cord at the point of overlap to prevent relative movement therebetween during operation of the machine, and winding separators inserted between overlapping end turns prior to the tying thereof for increasing the insulation therebetween, the improvement wherein:

  • the winding separator is formed of flat insulative material comprising a main body defined by a generally straight stator facing edge and a curved edge generally resembling the contour of a stator winding end turn, and a tab extending in the plane of said main body from the stator facing edge thereof, said tab being formed in part by a portion of said main body such that folding said tab back onto said main body along the stator facing edge thereof prior to insertion of the winding separator between the winding end turns operates to define a notch in said stator facing edge which is overlapped by a complementary portion of said tab, so that when the cord is tied around the winding end turns, it seats in the notch of the inserted winding separator and thereby bends the complementary tab portion into engagement with one of the overlapping winding end turns so that the complementary tab portion is positioned between the cord and the end turn, thereby providing increased insulation between the overlapping end turns and preventing the winding insulation from becoming damaged by contact with the cord.

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