To provide half-conductive varnish for electric field relaxation, which easily sets a resistance value, has less dispersion of the resistance value and has sufficient stability of the resistance value and to provide a tape and a stator of a rotating electrical machine.
In the stator of the rotating electrical machine, a stator coil 13 where a low resistance tape 17 is wound onto a main insulating layer 15 on a coil conductor 14 is stored in a slot 12 of a stator core 11. In the stator coil 13, half-conductive varnish for electric field relaxation, where at least two fills selected from a plurality of types of silicon carbide and triiron tetroxide whose granularity meshes are not less than #240 (average granularity is not more than 80 m), and adhesive of polybutadiene resin or silicone varnish are mixed at a prescribed rate is applied to a surface from an end of the low resistance tape 17 of a linear part 16b extending from the slot 12 to the main insulating layer 15.
TAKENO MASAHIRO
OKAMOTO TETSUSHI
TOSHIBA CORP
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Norio Ohu