| 摘要 |
PROBLEM TO BE SOLVED: To maintain coil insulation by preventing generation of air gaps in cured impregnated resin in the periphery of each strand insulated wire, concerning a strand coil of a high voltage rotating machine stator. SOLUTION: In lamination material 7 of a strand coil 2 constituting a stator coil, a prepreg layer 7a and a prepreg layer 7b are formed as a plurality of prepreg layers which have adjustable resin melting temperatures and are different in melting temperature. A base material layer 7c is made a center, and the prepreg layers 7b and 7a are arranged in this order toward both outsides in such a manner that the resin melting temperature becomes high. By this constitution, rapid curing of melted resin is made unnecessary by fluidity adjustment of the melted resin and the more accurate estimation of the diffused state, when the strand coil is pressure-molded at a high temperature, so that generation of air gaps due to foaming which is to be caused by rapid curing reaction can be prevented.
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