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Medida da permeabilidade magnética em fio delgado ferromagnético
(Editora Unesp, 1998-01-01)
Neste trabalho foi obtida uma expressão algébrica que relaciona a permeabilidade magnética de um fio delgado retilíneo ferromagnético, com a força eletromotriz gerada nas suas extremidades pela variação no tempo de uma ...
25 kHz amorphous core transformer for induction heating applications
(Elsevier B.V., 1990-01-01)
The analysis of the feasibility and economics of amorphous core power transformers for induction heating applications in the field 10-50 kHz is developped. The results obtained on a 25 kHz-150 kVA concentric winding trial ...
Hysteresis loss subdivision
(ELSEVIER SCIENCE BV, 2008)
Assuming that different energy dissipation mechanisms are at work along hysteresis, a hysteresis loss subdivision procedure has been proposed, using the induction at maximum permeability ( around 0.8 T, in electrical steels) ...
Efficiency optimization in small induction motors using magnetic slot wedges
(Elsevier Science Sa, 2017-11)
In the last few years, new efficiency requirements for induction motors have been imposed. Therefore electrical machines manufacturers have had to redefine the design criteria in order to reduce losses aiming to achieve ...
Optimization procedures in the design of continuous induction hardening and tempering installations for magnetic steel bars
(1998-12-01)
An inverse problem concerning the industrial process of steel bars hardening and tempering is considered. The associated optimization problem is formulated in terms of membership functions and, for the sake of comparison, ...
Combining Mager and Steinmetz: The Effect of Grain Size and Maximum Induction on Hysteresis Energy Loss
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2011)
Twelve samples with different grain sizes were prepared by normal grain growth and by primary recrystallization, and the hysteresis dissipated energy was measured by a quasi-static method. Results showed a linear relation ...
Subdivision of Hysteresis Loss in Mn-Zn Ferrite Toroidal Cores
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INCPISCATAWAY, 2012)
The hysteresis loss subdivision method proved to be a strong tool to help in the analysis of different energy dissipation mechanisms along the quasi-static hysteresis loop measured on electrical steels. This paper used the ...
Study of magnetic flux emergence and related activity in active region NOAA 10314
(Elsevier, 2012-03-15)
We study the extremely complex active region (AR) NOAA 10314, that was observed from March 13–19, 2003. This AR was the source of several energetic events, among them two major (X class) flares, along a few days. We follow ...
Structural and magnetic properties of Fe76P5(Si0.3B0.5C0.2)19 amorphous alloy
(Elsevier Science, 2012-09)
Recently, bulk amorphous alloys were produced in the Fe–B–Si–P–C system with high glass forming ability, excellent magnetic properties and the advantage of containing no expensive glass-forming elements, such as Ga, Y, Cr ...