method for manufacture of the stator of electric big machine and such a stator

摘要

The present invention relates to stators for large electrical machines, especially turbo generators, whose conductor windings consist partially of winding rods (4) laid in slots (3), as well as a corresponding production process taking into account the methods of total impregnation of the completely assembled arrangement with curable artificial resin. In stators of large electrical machines according to the invention, which are subjected to complete impregnation with artificial resin, the extensive applications according to the prior art for fixing the position of the winding rods (4) in the slots (3) are not necessary. In the case of installation of the winding rods (4), fixing of the position is necessary only to the extent that position changes of the winding rods (4) in the further course of the production process must be prevented. The closure of the slots (3) and the fixing of the winding rods (4) take place using simple, slightly sprung slot closing strips (7) which are fitted into recesses (8) of the slots (3) in the region of the slot openings (9). After impregnation with the resin, followed by curing, the winding rods (4) are fixed into the slots (3) essentially only by the cured impregnated resin. This permits the simple and economical production of particularly robust stators of high electrical and mechanical quality. IMAGE