STRUCTURE AND METHOD FOR BLOCKING HEADS OF STATOR WINDINGS OF ELECTRICAL MACHINES, IN PARTICULAR OF ELECTRIC GENERATORS

摘要

A structure (10) for blocking heads of stator windings of electrical machines, in particular of electric generators, comprises at least one tie element (12), in particular made of fibreglass, which is wound around and ties at least one head (7) of the windings and has at least some portions impregnated with a polymeric system; the polymeric system is free from solvents and comprises a bi-component resin, formed by at least one epoxy base resin and by at least one curing/polymerizing agent acting on the base resin, and a chromatic additive sensitive to the density of polymerization of the base resin.