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showing 10 items of 2193 documents

The Greenland shark Somniosus microcephalus—Hemoglobins and ligand-binding properties

2017

A large amount of data is currently available on the adaptive mechanisms of polar bony fish hemoglobins, but structural information on those of cartilaginous species is scarce. This study presents the first characterisation of the hemoglobin system of one of the longest-living vertebrate species (392 +/- 120 years), the Arctic shark Somniosus microcephalus. Three major hemoglobins are found in its red blood cells and are made of two copies of the same a globin combined with two copies of three very similar beta subunits. The three hemoglobins show very similar oxygenation and carbonylation properties, which are unaffected by urea, a very important compound in marine elasmobranch physiology.…

---0301 basic medicinegenetic structuresProtein ConformationGreenlandlcsh:MedicineRESONANCE RAMAN-SPECTRAHETERODONTUS-PORTUSJACKSONISpectrum Analysis RamanBiochemistrychemistry.chemical_compoundHemoglobinsProtein structureAMINO-ACID SEQUENCEAnimal CellsSequence Analysis ProteinRed Blood CellsUreaNOTOTHENIOID FISHESPost-Translational Modificationlcsh:ScienceHemeChondrichthyesMultidisciplinarybiologyChemistryOrganic CompoundsChemical ReactionsVertebrateEukaryotaMOLECULAR ADAPTATIONSMicrocephalusGlobinsChemistryBiochemistryOptical EquipmentVertebratesPhysical SciencesEngineering and TechnologyCellular TypesResearch ArticleEnvironmental MonitoringProtein BindingQUATERNARY STRUCTURESAllosteric regulationEquipmentSTRETCHING FREQUENCIESHeme03 medical and health sciencesOXYGEN-BINDINGbiology.animalAnimals14. Life underwaterGlobinHemoglobinPhotolysisBlood Cells030102 biochemistry & molecular biologyLaserslcsh:ROrganic ChemistryOrganismsChemical CompoundsBiology and Life SciencesProteinsxxxCell Biologybiology.organism_classificationCARTILAGINOUS FISHOxygen030104 developmental biologySomniosusFishSharkslcsh:QHemoglobinProtein MultimerizationELASMOBRANCH HEMOGLOBINElasmobranchiiPLoS ONE
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Modeling Stator Winding Inter-Turn Short Circuit Faults in PMSMs including Cross Effects

2020

Author's accepted manuscript. © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This paper presents a detailed analysis of stator winding inter-turn Short Circuit (ITSC) faults, taking the cross effects in the three phases of a permanent magnet synchronous motor (PMSM) into account by considering insulation degradation resistances. A PMSM with series coils in eac…

010302 applied physicsComputer sciencebusiness.industryStator020208 electrical & electronic engineering02 engineering and technologyStructural engineeringFault (power engineering)01 natural sciencesFinite element methodVDP::Teknologi: 500::Elektrotekniske fag: 540law.inventionInductancelawElectromagnetic coil0103 physical sciencesTurn (geometry)0202 electrical engineering electronic engineering information engineeringbusinessSynchronous motorShort circuit
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Maximum Torque Per Ampere control algorithm for low saliency ratio interior permanent magnet synchronous motors

2017

This paper presents an investigation on the comparison between the Maximum Torque Per Ampere (MTPA) and the Field Orientation Control (FOC) algorithms for interior permanent magnet synchronous machines (IPMSMs). In particular, this study was carried out on a small-power IPMSM with low salience ratio. Both control algorithms have been implemented in the Matlab/Simulink environment, obtaining promising results.

010302 applied physicsControl algorithmMaximum torque per ampere control algorithmPermanent magnet synchronous motorComputer scienceRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesField oriented control algorithmField orientationSalience (neuroscience)Control theoryMagnet0103 physical sciences0202 electrical engineering electronic engineering information engineeringInterior permanent magnet synchronous machineMATLABAmperecomputerMaximum torquecomputer.programming_language
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The helicoidal magnetic generator

2016

Recently helicoidal generator for the exploitation of sea wave energy has been proposed. This device can convert both the vertical and rotational movement of seawaves. The electrical energy generated by such a device must be converted and conditioned in order to match the instantaneous utility requirements and a power link from the sea to an interconnection is needed. In this paper, the authors propose a mathematical model of this device and preliminarily present a prototype of the machine.

010302 applied physicsInterconnectionEngineeringbusiness.industryLinear asynchronous generatorElectric potential energy05 social sciencesElectrical engineeringOcean EngineeringPermanent magnet synchronous generatorElectric machineSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciInductorOceanography01 natural sciencesPower (physics)Generator (circuit theory)Electromagnetic coil0502 economics and business0103 physical sciencesbusinessInstrumentation050203 business & managementEnergy (signal processing)Sea waves energy
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Experimental Investigation of Efficiency Map for an Inverter-Fed Surface-Mount Permanent Magnet Synchronous Motor

2019

Losses in inverter-fed permanent magnet motors are underestimated by using analytical or numerical approach since additional losses due to extra harmonics of the frequency converter are normally skipped. Further, losses in switches and passive components of the converter and the effect of switching frequencies cannot be numerically taken into consideration. Loss-minimizing control and proper efficiency analysis of inverter-fed permanent magnet motors cannot be achieved if an efficiency map is built based on a numerical investigation of the motors alone. This works first reviews losses in a surface-mount permanent magnet synchronous motor (SPMSM) and frequency converters. The efficiency map …

010302 applied physicsPermanent magnet synchronous motorComputer science020208 electrical & electronic engineeringSwitching frequency02 engineering and technologyConverters01 natural sciencesControl theoryModulationHarmonicsvisual_artMagnet0103 physical sciencesElectronic component0202 electrical engineering electronic engineering information engineeringvisual_art.visual_art_mediumInverter2019 8th International Conference on Renewable Energy Research and Applications (ICRERA)
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Experimental comparison of two control algorithms for low-saliency ratio interior permanent magnet synchronous motors

2018

In this paper, an experimental investigation on the comparison between the Maximum Torque Per Ampere (MTPA) and the Field Orientation Control (FOC) algorithms for interior permanent magnet synchronous machines (IPMSMs) is described, analyzed and discussed. This investigation was carried out on a small-power IPMSM with low saliency ratio. More in detail, after a previous simulation study, the control techniques have been experimentally implemented and validated through means of a dSPACE® rapid prototyping system. The performances of the two algorithms have been evaluated and compared, obtaining interesting results.

010302 applied physicsRapid prototypingControl algorithmElectromagneticsPermanent magnet synchronous motorComputer scienceRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringlow saliency ratio motor02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesField oriented control algorithmmaximum torque per ampere control algorithmControl theoryMagnet0103 physical sciencesAutomotive Engineering0202 electrical engineering electronic engineering information engineeringTorqueInterior permanent magnet synchronous machineAmpereMaximum torque
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Enhanced loss model algorithm for interior permanent magnet synchronous machines

2017

This paper presents an experimental study on the impact of the parameter variations over the performances of a LMA (Loss Model Algorithm) designed for an IPMSM (Interior Permanent Magnet Synchronous Machine). In a previous work, the characterization was carried out by assessing, for several working conditions, the motor parameters that influence the motor efficiency. The proposed enhanced loss model algorithm is implemented in a rapid prototyping system and its performances, in term of efficiency, are compared with other control systems, obtaining promising results.

010302 applied physicsRapid prototypingInterior permanent magnet synchronous motorComputer science020208 electrical & electronic engineeringWork (physics)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesDC motorTerm (time)Settore ING-IND/31 - Elettrotecnicaspeed control drive systemsMagnetControl system0103 physical sciences0202 electrical engineering electronic engineering information engineeringTorquepower loss minimizationSettore ING-INF/07 - Misure Elettriche E ElettronicheAlgorithmPermanent magnet synchronous machine2017 AEIT International Annual Conference
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Parameter sensitivity of flux-linkage based sensorless control for permanent magnet synchronous motors

2017

Sensorless control can be utilized to reduce cost, size and total complexity of a motor drive or enhance reliability of the system. This paper first presents a sensorless control algorithm for a surface permanent-magnet synchronous motor (SPMSM) based on estimated flux linkages and stator currents. Within the algorithm, rotor position error can be predicted by comparing the estimated currents with measured stator currents. Performance of the sensorless control based on flux-linkages and the dependency of the algorithm on motor parameters is then numerically investigated via simulations. It is found from the investigation that the accuracy of the method depends on the motor working condition…

010302 applied physicsRotor (electric)Computer scienceStator020208 electrical & electronic engineering02 engineering and technology01 natural sciencesFlux linkagelaw.inventionMotor driveDirect torque controlControl theorylaw0103 physical sciences0202 electrical engineering electronic engineering information engineeringTorqueSensitivity (control systems)Synchronous motor2017 20th International Conference on Electrical Machines and Systems (ICEMS)
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Space‐vector state dynamic model of SynRM considering self‐ and cross‐saturation and related parameter identification

2020

This study proposes a state formulation of the space-vector dynamic model of the Synchronous Reluctance Motor (SynRM) considering both saturation and cross-saturation effects. The proposed model adopts the stator currents as state variables and has been theoretically developed in both the rotor and stator reference frames. The proposed magnetic model is based on a flux versus current approach and relies on the knowledge of 11 parameters. Starting from the definition of a suitable co-energy variation function, new flux versus current functions have been initially developed, based on the hyperbolic functions and, consequently, the static and dynamic inductance versus current functions have be…

010302 applied physicsState variableComputer simulationComputer scienceStatorEstimation theoryRotor (electric)020208 electrical & electronic engineeringHyperbolic function02 engineering and technology01 natural scienceslaw.inventionInductanceError functionSettore ING-INF/04 - AutomaticaControl theorylaw0103 physical sciences0202 electrical engineering electronic engineering information engineeringSynchronous Reluctance Motor (SynRM) Space-vector dynamic model Parameter estimation Magnetic characteristicsElectrical and Electronic EngineeringIET Electric Power Applications
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FOC with Resolver Implementation for PMSM Drives by Using a Low Cost Atmel SAM3X8E Microcontroller

2020

The aim of this paper is the low-cost experimental implementation of a field oriented control strategy for a Permanent Magnet Synchronous Motor (PMSM) by using an Atmel SAM3X8E microcontroller, mounted on an Arduino DUE board. In this electrical drive for PMSM, a resolver is used in order to measure the rotor position and speed: Therefore, the low-cost Arduino DUE performs not only FOC algorithm and phase currents data acquisition, but also a resolver-To-digital converter process, rotor position and speed data acquisition, and resolver signals management. The code has been implemented in the open source Arduino IDE, using C language, whereas the control and plot visualization interfaces hav…

010302 applied physicsVector controlField oriented Control (FOC)Rotor (electric)business.industryComputer science020208 electrical & electronic engineeringProcess (computing)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesElectrical driveslaw.inventionMicrocontrollerPrinted circuit boardData acquisitionmicrocontrollerlawArduinoResolver0103 physical sciences0202 electrical engineering electronic engineering information engineeringPermanent magnet synchronous motor (PMSM)businessComputer hardware2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
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