Search results for "iron losses"

showing 5 items of 5 documents

Iron-dependent erythropoiesis in women with excessive menstrual blood losses and women with normal menses

2013

In women of fertile age, iron loss consequent to excessive menstrual discharge is by far the most frequent cause of iron-deficient anemia. However, the relationship between menstrual discharge and iron loss is poorly understood. In this prospective study, total menstrual and iron losses were assayed in a large cohort of non-anemic women and women with excessive menstrual blood losses (menorrhagia) in order to provide data useful for intervention. One hundred and five Caucasian women aged 20–45 years were recruited. Blood cell count and serum ferritin (SF) levels were determined in each case before menses. Menstrual fluid losses (MFL) were determined using a standardized pads’ weight method.…

Adultmedicine.medical_specialtyAnemiaIronIron deficient anemiaPhysiologyIron deficiency Excessive mesntrual blood lossesYoung AdultIron lossesInternal medicineHumansMedicineErythropoiesisProspective StudiesYoung adultProspective cohort studyMenorrhagiaMenstrual bloodGynecologyHematologyAnemia Iron-Deficiencybusiness.industryIron deficiencyIron deficiency; Iron deficient anemia; Iron losses; Menstrual blood lossesHematologyGeneral MedicineIron deficiencyMiddle Agedmedicine.diseaseMenstrual blood lossesMenstruationCohortErythropoiesisFemalebusinessAnnals of Hematology
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Input-Output Feedback Linearization Control of a Linear Induction Motor Taking Into Consideration Its Dynamic End-Effects and Iron Losses

2020

This article proposes a new input-output feedback linearization control (FLC) technique of linear induction motors (LIMs), taking into consideration both the dynamic end-effects and the iron losses. Starting from a previously conceived dynamic model, including the dynamic end-effects and the iron losses, all the theoretical framework of the FLC has been developed. The proposed FLC improves a previous version of FLC in accounting also the iron losses, which in LIMs with fixed-secondary sheet play a pivotal role more than in rotating induction motors (RIMs). The proposed FLC has been experimentally tested on a suitably developed test setup, and experimental comparisons between the proposed FL…

Dynamic end-effectsEnd effectComputer scienceinput-output feedback linearization control (FLC)05 social sciencesControl (management)020207 software engineering02 engineering and technologyiron lossesIndustrial and Manufacturing EngineeringLinear Induction Motor (LIM) Input-output Feedback Linearization Control (FLC) Dynamic end-effects Iron Losses Space-vector State ModelSettore ING-INF/04 - AutomaticaControl and Systems EngineeringControl theoryLinear induction motor0202 electrical engineering electronic engineering information engineeringlinear induction motor (LIM)0501 psychology and cognitive sciencesFeedback linearizationspace-vector state modelnonlinear controlElectrical and Electronic EngineeringInput output feedback linearization050107 human factors
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GA-based Off-Line Parameter Estimation of the Induction Motor Model Including Magnetic Saturation and Iron Losses

2020

This paper, starting from recent papers in the scientific literature dealing with Rotating Induction Motor (RIM) dynamic modelling, as a first step, improves its space-vector dynamic model, including both the magnetic saturation and iron losses; The main original aspects of the proposed model are the following: 1) the magnetic saturation of the iron core has been described on the basis of both current versus flux and flux versus current functions, 3) it includes the iron losses, separating them in hysteresis and eddy current ones, 4) it includes the effect of the load on the magnetic saturation. Afterwards, it proposes an off-line technique for the estimation of electrical parameters of thi…

EngineeringIdentificationMaterials scienceStatorParameter EstimationSpace-vector dynamic model02 engineering and technologylaw.inventionlawControl theoryIron losses0202 electrical engineering electronic engineering information engineeringEddy current0501 psychology and cognitive sciences050107 human factorsMagnetic saturationLeakage inductanceComputer simulationbusiness.industryEstimation theoryrotating induction motor (rim)05 social sciences020207 software engineeringMagnetic hysteresisInduction Motor (IM)Magnetic fluxFinite element methodMagnetic corelcsh:Electrical engineering. Electronics. Nuclear engineeringbusinesslcsh:TK1-9971Induction motor
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Space-vector State Dynamic Model of the SynRM Considering Self, Cross-Saturation and Iron Losses and Related Identification Technique

2023

This article proposes a space-vector dynamic model of the Synchronous Reluctance Motor (SynRM) including both self-saturation, cross-saturation effects, and iron losses. The model is expressed in state form, where the magnetizing current has been selected as a state variable. The proposed dynamic model is based on an original function describing the relationship between the stator flux and the magnetizing current components, improving a previously developed magnetic model. Additionally, the proposed model includes, besides the magnetic saturation, also iron losses. The proposed model requires 11 coefficients, among which 6 describe the self-saturation on both axes and 5 describe the cross-s…

Settore ING-INF/04 - AutomaticaControl and Systems EngineeringSynchronous Reluctance Motor (SynRM) space-vector dynamic model magnetic model iron losses parameters' estimationElectrical and Electronic EngineeringIndustrial and Manufacturing Engineering
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Space-vector State Dynamic Model of the Synchronous Reluctance Motor Considering Self, Cross-Saturation and Iron Losses

2021

This paper proposes a space-vector dynamic model of the Synchronous Reluctance Motor (SynRM) including both self-saturation, cross-saturation effects, and iron losses expressed in state form, where the magnetizing current has been selected as a state variable. The proposed dynamic model is based on an original function between the stator flux and the magnetizing current components, improving a previously developed magnetic model. Additionally, the proposed model includes, besides the magnetic saturation, also iron losses. The proposed model requires 11 coefficients, among which 6 describe the self-saturation on both axes and 5 describe the cross-saturation. Starting from the definition of a…

State variablemagnetic modelComputer simulationEstimation theoryStatorFunction (mathematics)parameters' estimationMagnetic fluxlaw.inventionError functionSettore ING-INF/04 - AutomaticaControl theorylawIron lossesReciprocity (electromagnetism)space-vector dynamic modelSynchronous Reluctance Motor (SynRM)Mathematics
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