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US 5,708,315 AGranted
Stretchable coil wrapper for a dynamoelectric machine
OwnerGary Michael Gould, Piero Vittorio Roncainventors
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OwnerGary Michael Gould, Piero Vittorio Roncainventors
Estimating the term…
Stator bars and stator coils (winding elements) for a large dynamoelectric machine which are to be permanently placed in the slots of the magnetic core of the machine are wrapped so as to be surrounded on three sides with an elongated sheet of an elastomeric substance. A stretching device is attached to the two overlapping edges of the elastomeric sheet in such a manner as to be able to stretch the sheet around the winding element and thus reduce the thickness of the elastomer. The winding element surrounded by the stretched layer of the elastomeric substance is placed in a selected stator slot and the stretching device is detached from the elastomeric material. The elastomeric material attempts to regain its former thickness but is confined to the remaining space between the winding element and the sides of the slot. The offal is trimmed from the elastomeric substance and the winding element remains lodged in the slot.
A large dynamoelectric machine in which the winding elements of the stator of the machine are coated with a suitable coating of groundwall insulation, said coated winding elements being embedded in the stator slots of the machine and secured in place by a previously stretched elastomeric substance which contacts at least one surface of each stator slot.
A dynamoelectric machine having a stator and a rotor, said stator having plurality of stator winding slots for the reception of previously insulated coil windings in said slots, said winding elements being secured in each stator windings slot by a prestretched prevulcanized silicone rubber material which contacts at least one surface of each stator winding slot.
Dependencies are inferred from the claim text.