Stator coil for rotary electric machine

摘要

PCT No. PCT/JP97/04668 Sec. 371 Date Jul. 27, 1999 Sec. 102(e) Date Jul. 27, 1999 PCT Filed Dec. 18, 1997 PCT Pub. No. WO99/31782 PCT Pub. Date Jun. 24, 1999A stator coil for a rotating electrical machine having a ground wall insulation of a stator coil impregnated with a resin, maintaining a releasing characteristic between the ground wall insulation and a slot of a stator core, preventing surface corona and exhibiting excellent characteristics for a long time. The stator coil of the rotating electrical machine has a conductor covered with an insulating layer and a surface-corona preventive layer, the stator coil being accommodated in the slot of a stator core and, together with the stator core, impregnated with a thermosetting resin so that the stator coil is integrated with the stator core. The surface-corona preventive layer has a wound semiconductive tape and a composite tape including a fluorine-containing non-bonding material layer on a second semiconductive tape. The slot of a stator core and the insulating layer contact the semiconductive tapes and the non-bonding material is disposed between the semiconductive tapes, forming a gap in a widthwise direction of the non-bonding material layer.