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Iron loss in machines with powdered iron stators
IEEE International Electric Machines and Drives Conference. IEMDC'99. Proceedings (Cat. No.99EX272), 2003This paper describes iron loss measurements in a permanent magnet servomotor, which has a stator constructed with soft magnetic composites (SMCs). It is shown that whilst the SMC has significantly greater iron loss density than silicon iron steel, it has many other advantages. The SMC machine is shown to outperform its conventional laminated equivalent.
A.G. Jack, B.C. Mecrow, P.G. Dickinson
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Annual Iron Loss Associated with Hemodialysis
American Journal of Nephrology, 2016<b><i>Background:</i></b> In order to keep up the optimal iron status in chronic hemodialysis patients, it is important to know how much iron is lost due to hemodialysis. Residual blood associated with the hemodialysis procedure together with blood sampling inevitably causes the loss of iron in chronic hemodialysis patients ...
Tatsuo, Tsukamoto +4 more
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The determination of menstrual iron loss
Biochemical Medicine, 1970Abstract A procedure involving dry ashing and spectrophotometry with thioglycollic acid is described for the determination of iron loss during menstruation. In its development the nonvolatility of iron was checked and wet-oxidation and dry-ashing methods of destroying organic matter compared with special reference to citrated whole blood.
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Armature Iron Losses in Series Motors
Transactions of the American Institute of Electrical Engineers, 1949IN AN A-C series motor, the flux pulsation in the field is predominantly at line frequency. The field iron loss can be computed easily and represented by a loss component in the magnetizing current. However, due to the rotation of the armature, the gap flux is rotating relative to the armature, as well as pulsating.
Sheldon S. L. Chang, J. H. Karr
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2015 IEEE International Electric Machines & Drives Conference (IEMDC), 2015
This paper addresses the influence of the estimation of hysteresis, eddy current and excess loss coefficients on the prediction of the overall iron losses in traction motors. Two standard iron loss models (according to Bertotti and Jordan) are presented and it is examined how the determination of the corresponding loss coefficients is effecting the ...
Jonathan Juergens +3 more
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This paper addresses the influence of the estimation of hysteresis, eddy current and excess loss coefficients on the prediction of the overall iron losses in traction motors. Two standard iron loss models (according to Bertotti and Jordan) are presented and it is examined how the determination of the corresponding loss coefficients is effecting the ...
Jonathan Juergens +3 more
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Accuracy of iron loss calculation in electrical machines by using different iron loss models
Journal of Magnetism and Magnetic Materials, 2003Abstract The paper presents iron loss calculation in rotational electrical machines by using different iron loss models. The accuracy of each iron loss model was determined by the comparison of measured and calculated iron losses in the case of distorted elliptically rotating flux density waveforms, generated inside the fully 2D waveform controlled ...
B. Štumberger +5 more
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Accuracy of iron loss estimation in induction motors by using different iron loss models
Journal of Magnetism and Magnetic Materials, 2004Abstract The paper presents iron loss estimation in a three-phase induction motor by using different iron loss models for the posterior iron loss calculation. The iron losses were determined by using modeled properties of used electrical steel and calculated distribution of magnetic induction B (t ) in all parts of the motor by using 2D ...
B. Štumberger +4 more
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Iron Loss and Iron Requirement
1983Measurement of iron loss is technically difficult. Chemical iron balances require meticulous technique to avoid contamination, and they do not allow the differentiation between nonabsorbed iron and iron excreted through the gastrointestinal tract. Isotope techniques require knowledge of the distribution of the radioiron within the organism and the ...
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Iron losses in processing tailings
Journal of Mining Science, 2005For ferruginous quartzite of the Mikhailovsk deposit, the features of mineral composition, iron occurrence, granulometric composition, and opening of phases of stage and total tailings of processing are considered. Extraction of hematite from tailings using combined concentration schemes is one of the variants of complex utilization of mineral source ...
T. N. Gzogyan +3 more
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Iron losses in turbogenerator teeth
Journal of Applied Physics, 1982The flux density was measured in a typical tooth of a 500-MV A synchronous generator. Peak flux densities of 14.3, 16.9, and 21.2 kG were observed in an open circuit test at 80%, 100%, and 125% of rated voltage. The search coil voltage waveforms were rich in odd harmonics tending toward a square wave.
F. J. Young, H. L. Schenk
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