Title :
Rotational Power Losses and Vector Loci Under Controlled High Flux Density and Magnetic Field in Electrical Steel Sheets
Author :
Zurek, Stan ; Meydan, Turgut
Author_Institution :
Sch. of Eng., Cardiff Univ.
Abstract :
This paper presents the rotational power loss P, curves measured for nonoriented, conventional grain-oriented and high-permeability grain-oriented electrical steel under controlled loci of flux density B, or magnetic field H. The P is measured at 10, 50, and 250 Hz with the radius of circular loci of B being controlled from 0.5 to 2.0 T and the radius of circular loci of H from 50 to 20 kA/m. The well-known phenomenon of decreasing P at higher magnetization is confirmed in the results. The maximum P under controlled circular H can be up to 2.5 times higher than under controlled circular B and up to six times higher than the value of alternating loss for anisotropic electrical steels. In thicker laminations at higher frequencies, the peaks in P curves vanish due to increased contribution of eddy currents
Keywords :
eddy current losses; magnetic cores; magnetic fields; magnetic flux; magnetisation; steel; 0.5 to 2 T; 10 Hz; 250 Hz; 50 Hz; alternating power loss; controlled circular loci; controlled flux density; controlled magnetic field; eddy currents; electrical steel sheets; magnetization; rotational power losses; Anisotropic magnetoresistance; Density measurement; Electric variables measurement; Loss measurement; Magnetic field measurement; Magnetic fields; Magnetization; Power measurement; Rotation measurement; Steel; Alternating power loss; controlled flux density; controlled magnetic field; rotational power loss;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879907