A highly reliable rotating electric machine is provided in which the amount of charge discharged by partial discharge can be reduced while the machine is downsized by decreasing the thickness of insulation for coils, and it is possible to prevent paper flapping in coil end portions because of rotating wind produced by rotation of the rotor. The foregoing machine includes a stator coil including a coil conductor and a main insulation layer covering the coil conductor surface, a slot core which encloses the stator coil, and a first insulating paper sheet which is wound around the stator coil, adjoining the slot core, and a second insulating paper sheet which is wound around the stator coil, adjoining the main insulation layer, both the insulation paper sheets being placed between the stator coil and the slot core, wherein the first insulating paper sheet has a semiconductive layer abutting on the slot core and the second insulating paper sheet has a semiconductive layer located abutting on the stator coil, and an end portion of the second insulating paper sheet is exposed in an opening portion of the slot core.

A highly reliable rotating electric machine is provided in which the amount of charge discharged by partial discharge can be reduced while the machine is downsized by decreasing the thickness of insulation for coils, and it is possible to prevent paper flapping in coil end portions because of rotating wind produced by rotation of the rotor. The foregoing machine includes a stator coil including a coil conductor and a main insulation layer covering the coil conductor surface, a slot core which encloses the stator coil, and a first insulating paper sheet which is wound around the stator coil, adjoining the slot core, and a second insulating paper sheet which is wound around the stator coil, adjoining the main insulation layer, both the insulation paper sheets being placed between the stator coil and the slot core, wherein the first insulating paper sheet has a semiconductive layer abutting on the slot core and the second insulating paper sheet has a semiconductive layer located abutting on the stator coil, and an end portion of the second insulating paper sheet is exposed in an opening portion of the slot core.

An armature is provided with an armature winding, an armature core and a first and second insulation sheets. The first insulation sheet is arranged to sequentially pass through a field magnet side of a first phase conductor, a portion between the first phase conductor and a second phase conductor, an armature core side of the second phase conductor and a third phase conductor and a portion between the third phase conductor and the first phase conductor. The second insulation sheet is arranged to sequentially pass through a portion opposite to the first phase conductor with respect to the first insulation sheet, a field magnet side of the second conductor, a portion between the second phase conductor and the third phase conductor, a portion between the third phase conductor and the first insulation sheet and a portion between the third phase conductor and the first insulation sheet.

An armature is provided with an armature winding, an armature core and a first and second insulation sheets. The first insulation sheet is arranged to sequentially pass through a field magnet side of a first phase conductor, a portion between the first phase conductor and a second phase conductor, an armature core side of the second phase conductor and a third phase conductor and a portion between the third phase conductor and the first phase conductor. The second insulation sheet is arranged to sequentially pass through a portion opposite to the first phase conductor with respect to the first insulation sheet, a field magnet side of the second conductor, a portion between the second phase conductor and the third phase conductor, a portion between the third phase conductor and the first insulation sheet and a portion between the third phase conductor and the first insulation sheet.

A stator unit of an electric motor for driving a hermetic compressor including a stator core and a coil separator cage, which is inserted into the stator core and includes a substantially annular disc-shaped base part and elongated separating webs distributed over the circumference of the base part, with their longitudinal axes extending in the axial direction relative to the stator core, wherein the annular disc-shaped base part is fastened to a first end face of the stator core, and a separating web engages in each stator slot, such that one of the separating webs is arranged between two adjacent coils, wherein each gap between the coil separator cage and the coil windings is filled with an insulating filler.

A stator unit of an electric motor for driving a hermetic compressor including a stator core and a coil separator cage, which is inserted into the stator core and includes a substantially annular disc-shaped base part and elongated separating webs distributed over the circumference of the base part, with their longitudinal axes extending in the axial direction relative to the stator core, wherein the annular disc-shaped base part is fastened to a first end face of the stator core, and a separating web engages in each stator slot, such that one of the separating webs is arranged between two adjacent coils, wherein each gap between the coil separator cage and the coil windings is filled with an insulating filler.

A stator includes first exterior members that surround sides of outer circumferential portions of coil ends on both end sides of an iron core, second exterior members connected to the first exterior members, and which surround sides of end portions of the coil ends in the axial direction, and mold members that cover the coil ends and are placed in contact with the first exterior members and the second exterior members. Holes are formed in the second exterior member on one end side, and a surface that faces the mold member, of the second exterior member on the one end side, is inclined in a manner so that a thickness thereof becomes continuously thinner toward the holes.

A stator includes first exterior members that surround sides of outer circumferential portions of coil ends on both end sides of an iron core, second exterior members connected to the first exterior members, and which surround sides of end portions of the coil ends in the axial direction, and mold members that cover the coil ends and are placed in contact with the first exterior members and the second exterior members. Holes are formed in the second exterior member on one end side, and a surface that faces the mold member, of the second exterior member on the one end side, is inclined in a manner so that a thickness thereof becomes continuously thinner toward the holes.

Compositions for fixing a non-conductive material to a reinforcing layer are provided. In one embodiment, the composition being used to fix a non-conductive material on a reinforcing layer including a novolac produced by condensation of a substituted or unsubstituted phenol with an aldehyde in the presence of a catalyst, and optionally other additives.

Compositions for fixing a non-conductive material to a reinforcing layer are provided. In one embodiment, the composition being used to fix a non-conductive material on a reinforcing layer including a novolac produced by condensation of a substituted or unsubstituted phenol with an aldehyde in the presence of a catalyst, and optionally other additives.