Prace diagnostyczne w dziedzinie dużych transformatorów w Polsce

Material and magnetic degradation on the edges of electromagnetic silicon steel sheets is usually passed over at the time of designing electro-mechanical plants/equipment. Magnetic changes of material on the sheet edges to a significantly smaller extent apply to transformers; in the electric machines they can produce losses at the level of fractional parts in the scale of one percent. When adding to the losses the influences of magneto-elastic and reverse phenomena (Joule and Villari), one can expect losses up to 0.5%. Preliminary laboratory and simulation researches of modern electric machine solutions point at the significance of this issue. This article presents researches into shapes preparation process influence on the material structure in different production technologies.