Order Publications

Reference: WGR_274_1

Working Group Reports

Usage of magnetic slot wedges in hydro generators



Stator of hydro generators is usually designed and constructed with open slots. Winding (bars or coils) is inserted in stator core and then fixed with the non-magnetic slot wedges. The consequences of the open slots are the slots harmonics which have effect on some characteristics of the generator (Total Harmonic Distortion factor (THD), power losses, reactances,and excitation current). One of the suitable ways for reducing negative effects of slotted core (slot harmonics) is utilization of magnetic wedges. Characteristics of presently used materials for magnetic wedges as well as gained experience ensure real possibilities for application in case of the hydro generators.

File Size: 462,9 KB

Pages NB: 6

Study Committee : A1 ?

WG (TF): WG A1.30

Year: 2014

FREE free
Non member
FREE free

Your AccountYour Account

Password forgotten


may download free of charge all publications including most recent ones

Non Members

may download free of charge publications over three years old and purchase all publications

For any questions in connection with the on-line library, contact:


Publications and Edition Manager