Gaiduk S. Magnetostatic fields in laminated silicon steel sheets

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0402U001188

Thesis Registration Form

0402U001188.pdf

Applicant for

Specialization

  • 01.04.11 - Магнетизм

29-03-2002

Specialized Academic Board

Д 64.051.03

V.N. Karazin Kharkiv National University

Essay

Object of study: grain-oriented silicon steel sheets (Fe-3%Si sheets) and cores of these sheets. Aim: the detection of the relation between magnetostatic fields Hm created by air gaps in joints of silicon steel sheets in cores and by grain boundaries in g. o. steel sheets, magnetization distribution in steel sheets near the sources of the fields and magnetic performances of the cores. Methods: induction method of measurements of magnetic fields and an induction (magnetization) distribution; longitudinal Kerr effect for the domain structure observation; the wattmeter's method for the core loss measurements; method of magnetic scalar potential for analytical calculations of the fields Нm. Results, novelty: it was detected, that the gap-stray fields is the superposition of the fields of surface 'magnetic charges' Hsur, caused by abrupt in the normal component of magnetization ?Mn at end surfaces of sheets, forming a gap, and the fields of the volume 'magnetic charges' Hvol, caused by the inhomogeneity ofmagnetization divM?0 in the volumes of sheets close to air gaps; magnetization distribution near the grain boundaries in silicon steel sheets was investigated for the first time, and the discontinuities in the net magnetization at the grain boundaries were not observed: ?Mn=0; the calculations of the stray fields associated with the inhomogeneities of magnetization (divM(r)?0) near the boundaries were carried out for the first time; the influence of the fields Hm generated by the grain boundaries and by air gaps on magnetization processes of cores of g. o. silicon steel sheets was studied, and the leading role of the longitudinal component (along the rolling direction and external fields) of these fields in this influence was detected for the first time Field of implementation: magnetism, physics of soft magnetic materials, transformers.

Read more

Files

3 Выводы_укр.doc

3.1 _укр.doc

3.2 _укр.doc

3.3 _укр.doc

3.4 _укр.doc

4 Выводы _укр.doc

4.1 _укр.doc

4.2 _укр.doc

4.3 _укр.doc

_Общ выводы _укр.doc

aref_ua.doc

Введение_укр.doc

Общие выводы_рус.doc

Оглавление+.doc

Раздел 1 _укр.doc

Раздел 2 _укр.doc

Рис 2.01+2.02+2.03 направления+образцы - зазор+граница.doc

Рис 2.04 (датчики).doc

Рис 2.05 (определение Hs зазор+граница).doc

Рис 2.06 (исследование Нm в сердечниках).doc

Рис 2.07 (определение DВ для 1 и 3 слоев).doc

Рис 3.01+3.02.doc

Рис 3.03+3.04.doc

Рис 3.05+3.06.doc

Рис 3.07+3.08 система координат+намагниченность.doc

Рис 3.09 Hvol.doc

Рис 3.10 Hsur.doc

Рис 3.11 Hx(x)+3.12 Hу(x).doc

Рис 3.13+3.14 Hx+Ну (exp+cal).doc

Рис 3.15+3.16 Hmax (z)+Hmax (y).doc

Рис 3.17.doc

Рис 3.18+3.19.doc

Рис 3.20+3.21.doc

Рис 3.22 (фото).doc

Рис 3.23+3.24.doc

Рис 3.26+Таблица 3.1 потери+ток.doc

Рис 3.27 индукция.doc

Рис 3.28 внутр поле.doc

Рис 4.2 Hs 1050+2050.doc

Рис 4.5 Hs.doc

Рис 4.6 Hx,y,z(x) расчет+эксп 550 .doc

Рис 4.7+4.8.doc

Список литературы+.doc

Титульный _фмя+.doc

мои_публикации.doc

условные сокращения+.doc

Similar theses

0521U101528

Kravets Anatolii Fedorovych

Magnetic properties of multilayer nanostructures with temperature-dependent interlayer exchange interaction

0421U102602

Bludov Oleksii Mykolajovych

Features of resonant properties and magnetic phase transformations in praseodymium ferroborate and rare earth chromoborates

0421U102000

Poperezhai Sergii Mykolayovych

Spectral features of spin and phonon excitations in double alkali-rareearth molybdates and erbium alumoborate

0521U101162

Shpetnyy Ihor Oleksandrovych

Influence of structural-phase state on magnetic, magnetoresistive, magneto-optical and electrophysical properties of heterogeneous nanostructured film systems.

0521U100964

Saliuk Olga Yuriivna

Magnetodynamic properties of functional materials for spintronics and magnitophotonics applications – Scientific report. Collection of scientific manuscripts.