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Publications in Scientific Journals:

D. Sabic, H. Pfützner, F. Hofbauer, G. Shilyashki, E Mulasalihovic:
"Dynamics effects on losses due to rotational magnetization";
Przeglad Elektrotechniczny, vol 87 (2011), no 9b; 29 - 32.



English abstract:
As well known, rotational magnetization (RM) may cause high increases of power losses P in comparison to alternating magnetization (AM), in particular for highly grain oriented SiFe. So far, it had been assumed that the loss increase is a mere function of shape of the induction pattern B(t). However, closer investigations reveal that a further impact is given by the angular velocity of the vector B. Compared to low dynamics as being typical for simulations on RSSTs, high dynamics as being typical for T-joint regions of transformer cores yield further increases of losses. For elliptic RM, the increases are rather weak and tend to decrease with rising axis ratio a. On the other hand, distinctly increased P arises for rhombic RM as being typical for transformers. Further increases result for oblique rhombic RM as arising close to overlaps. On the other hand, lower P is given for the case of DC bias due to the fact that anomalous eddy current losses play a weaker role here.

Created from the Publication Database of the Vienna University of Technology.