Edge sealed slot liner
Assignee3M Innovative Properties Company
InventorsNaohiro Takemoto, Hiroyuki Hirayama, Naoyuki Toriumi
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Abstract
A multi-layer slot liner for a rotary electrical system, comprising an electrically insulating substrate layer, a first heat-activated adhesive layer comprising thermally expandable particles which is arranged on a first surface of the substrate layer, and a first adhesive permeable cover layer arranged on the first heat-activated adhesive layer. At least two of the layers extend together and terminate at an edge, where the edge is covered by a seal.
Claims14
A multi-layer slot liner for a rotary electrical system, comprising an electrically insulating substrate layer, a first heat-activated adhesive layer comprising thermally expandable particles which is arranged on a first surface of the substrate layer, and a first adhesive permeable cover layer arranged on the first heat-activated adhesive layer, at least two of the layers extending together and terminating at an edge, wherein the edge is covered by a seal.
A method of sealing a slot in a stator of a rotary electrical system, comprising:
- providing a continuous multi-layer sheet comprising an electrically insulating substrate layer, a first heat activated adhesive layer arranged on a first surface of the substrate layer, and a first adhesive permeable cover layer arranged on the first heat-activated adhesive layer, at least two of the layers extending together and terminating at an edge,
- cutting a section of the sheet to form a slot liner and arranging the slot liner into a slot of the stator repeatedly until all slots are filled,
- applying a sealing composition to the edges of the slot liners, and
- curing the sealing composition to form a seal that covers the edges of the slot liners.
Dependencies are inferred from the claim text.