Search results for " Permanent magnets"

showing 8 items of 8 documents

The magnet of the scattering and neutrino detector for the SHiP experiment at CERN

2019

The Search for Hidden Particles (SHiP) experiment proposal at CERN demands a dedicated dipole magnet for its scattering and neutrino detector. This requires a very large volume to be uniformly magnetized at B > 1.2 T, with constraints regarding the inner instrumented volume as well as the external region, where no massive structures are allowed and only an extremely low stray field is admitted. In this paper we report the main technical challenges and the relevant design options providing a comprehensive design for the magnet of the SHiP Scattering and Neutrino Detector.

TechnologyPhysics - Instrumentation and Detectorswigglers and undulators)magnet: designPermanent magnet devicesPhysics::Instrumentation and Detectorsengineering01 natural sciences7. Clean energy09 Engineering030218 nuclear medicine & medical imagingradiation hardened magnetsSubatomär fysik0302 clinical medicineDipole magnetSubatomic PhysicsNeutrino detectorsDetectors and Experimental TechniquesInstruments & InstrumentationInstrumentationphysics.ins-detAcceleration cavities and magnets superconducting (high-temperature superconductor; radiation hardened magnets; normal-conducting; permanent magnet devices; wigglers and undulators)Mathematical PhysicsPhysics02 Physical SciencesLarge Hadron ColliderInstrumentation and Detectors (physics.ins-det)magnet: technologyNuclear & Particles Physicsbending magnetneutrino: detectorNeutrino detectornormal-conductingAcceleration cavities and magnets superconducting (high-temperature superconductorproposed experimentCERN LabRadiation hardened magnetsFOS: Physical sciencesNormal-conductingAccelerator Physics and InstrumentationNuclear physics03 medical and health sciences0103 physical sciencespermanent magnet devices[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Wigglers and undulators)normal-conducting magnetsScience & Technology010308 nuclear & particles physicsScatteringLarge detector systems for particle and astroparticle physicsAcceleratorfysik och instrumenteringLarge detector systems for particle physicsHigh temperature superconductors Neutrons Permanent magnets Ships Superconducting magnets Wigglers Astroparticle physics Comprehensive designs Massive structures Neutrino detectors Normal-conducting Radiation-hardened Ship experiments Technical challenges Particle detectorsVolume (thermodynamics)MagnetAcceleration cavities and magnets superconducting (high-temperature superconductor; Large detector systems for particle and astroparticle physics; Neutrino detectors; Normal-conducting; Permanent magnet devices; Radiation hardened magnets; Wigglers and undulators)High Energy Physics::Experimentneutrino detectors
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The use of sea waves for generation of electrical energy: a linear tubular asynchronous electrical generator

2007

A linear tubular asynchronous generator to be used as generator driven by seawave is presented. The design criteria of a TLIM with hollowed iron induced part as well as the technological processes to be adopted and the materials utilized in the various parts are described. The methodologies for mechanical assembling and electric wiring are considered too. Finally, the prototype with bimetallic induced part that has been designed and built is presented and some experimental results on electrical and mechanical variables are shown.

Sea wavesEngineeringbusiness.industryElectric potential energyInduction generatorMechanical engineeringElectric generatorInduction generators Stator windings Iron Prototypes Frequency Permanent magnets Voltage Telecommunications AssemblySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettricilaw.inventionGenerator (circuit theory)Asynchronous communicationlawWind waveWave power generationbusinessOCEANS 2007
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Evaluation of the power quality from a seawave power farm for different interconnection schemes

2007

In this paper we present an approach to the interconnection of a seawave power farm to the grid The generator type used in the farm is a Permanent Magnet (PM) linear generator driven from the seawaves that generates, therefore, highly distorted emfs. We propose and compare two possible ways to interconnect the farm to the grid. One is based on an approach where for each generator there is a conversion subsystem that permits the direct connection of each generator to the a.c. network, the other one is based on an ac.-d.c. converter that is connected to the generator, the converter is connected to a dc link that can receive the power from every unit and that can supply a dc-ac converter direc…

InterconnectionEngineeringGenerator (computer programming)business.industryElectrical engineeringSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciGridPower (physics)Power quality Power generation DC generators Distributed power generation Stator windings Mesh generation Permanent magnets Stochastic processes Frequency SpringsElectricity generationMesh generationLinear congruential generatorElectronic engineeringbusinessSynchronous motor
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A Cogging Torque Minimization Procedure for Interior Permanent Magnet Synchronous Motors Based on a Progressive Modification of the Rotor Lamination …

2022

This article describes a simple cogging torque minimization procedure for interior permanent magnet synchronous machines (IPMSMs), consisting of a progressive modification of the rotor lamination geometry. This procedure can be generalized for the main topologies of PMSM, independently of the number of stator slots or the location of the permanent magnets. For this purpose, a basic IPMSM structure is analyzed by means of the FEM (finite element method) approach, and then, several other IPMSM geometries, obtained by adequately modifying the rotor lamination geometry of the basic IPMSM model without changing its stator configuration, are proposed and discussed. The trends of the cogging torqu…

Control and OptimizationRenewable Energy Sustainability and the EnvironmentEnergy Engineering and Power TechnologyBuilding and Constructioncogging torque interior permanent magnet synchronous motors permanent magnets harmonic analysis FEM analysis rotor laminationElectrical and Electronic EngineeringSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettricicogging torque; interior permanent magnet synchronous motors; permanent magnets; harmonic analysis; FEM analysis; rotor laminationEngineering (miscellaneous)Energy (miscellaneous)
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Cogging torque comparison of Interior Permanent Magnet Synchronous Generators with different stator windings

2017

This paper presents the comparison between the cogging torques produced by four IPMSGs (Interior Permanent Magnet Synchronous Generators) with different stator winding configurations. More in detail, an IPMSG model, which is derived from a commercial geometry, is analyzed through means of a FEM (Finite Element Method) approach. Then, three more structures are determined and analyzed by adequately changing the number of stator slots of the basic IPMSG stator structure and by maintaining the same rotor configuration. From the obtained simulation results, the cogging torque components for each structure are determined and compared. From this comparison, it can be stated that the use of dissymm…

Engineeringbusiness.industryRotor (electric)StatorRenewable Energy Sustainability and the EnvironmentCogging torque; FEM analysis; IPMSG; permanent magnets; Energy Engineering and Power Technology; Renewable Energy Sustainability and the Environment020209 energyCogging torqueEnergy Engineering and Power TechnologyIPMSG02 engineering and technologyCogging torqueForgingFinite element methodlaw.inventionElectromagnetic coillawControl theoryMagnet0202 electrical engineering electronic engineering information engineeringpermanent magnetTorquebusinessFEM analysi
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Finite-element performance comparison of IPMSMs with unsymmetrical double-layer windings

2017

This paper presents a comparison of the performances between IPMSMs (Interior Permanent Magnet Synchronous Machine) with a symmetrical and with two different types of unsymmetrical windings. The aim is to demonstrate that the adoption of slightly unsymmetrical windings does not significantly affect the performances of the machines, both in terms of cogging torque and torque/load angle characteristics, providing also the advantage of a higher possibility of choice in terms of slot number/poles ratio. More in particular, an IPMSM model (named IPMSM-1) derived from a commercial geometry equipped with a symmetrical winding is analyzed by using a Finite Element Method (FEM) approach. The simulat…

Engineeringunsymmetrical windingsStatorCogging torque; FEM analysis; IPMSM; permanent magnets; unsymmetrical windings; Renewable Energy Sustainability and the Environment; Automotive Engineering; Electrical and Electronic EngineeringFEM analysisSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural scienceslaw.inventionHarmonic analysislaw0103 physical sciencesTorqueRenewable EnergyElectrical and Electronic Engineering010306 general physicsFEM analysi010302 applied physicsSustainability and the EnvironmentRotor (electric)business.industryRenewable Energy Sustainability and the EnvironmentElectrical engineeringCogging torquepermanent magnetsStructural engineeringCogging torqueFinite element methodIPMSMSettore ING-IND/31 - ElettrotecnicaElectromagnetic coilMagnetAutomotive Engineeringpermanent magnetunsymmetrical windingbusiness
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Improvement of IPMSM performance through a mixed radial-tangential rotor structure

2010

In this paper an IPMSM (Interior Permanent Magnet Synchronous Motor) rotor configuration optimization is proposed in order to increase the performances in terms of torque, limiting at the same time the rotor leakage flux. The final mixed radial and tangential rotor configuration here proposed and described determines a reduction in PM material quantity of about 25% compared to a tangential IPMSM one with the same dimension and weight, together with an increase of the motoring torque of about 50%. Some simulation carried out by using a FEM software and a comparative analysis with two traditional IPMSMs rotor configurations show that a significant improvement can be achieved with limited chan…

Materials scienceSquirrel-cage rotorStatorRotor (electric)Magnetic flux leakageSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciWound rotor motorlaw.inventionMagnetic coreControl theorylawIPMSM Permanent magnets (PM) RotorTorqueSynchronous motor2010 IEEE International Symposium on Industrial Electronics
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STUDIO DI UN AMMORTIZZATORE ELETTROMAGNETICO A RECUPERO DI ENERGIA

2013

Questo lavoro ha come obiettivo principale lo studio teorico e con supporto di software F.E.M. di un dispositivo che consenta recupero energetico da una sospensione automobilistica. In sostituzione allo smorzatore viscoso, che dissipa l’energia cinetica del veicolo a seguito dell’attraversamento di strade sconnesse o ostacoli più marcati, si è usato uno smorzatore elettromagnetico che svolga le funzioni dello smorzatore viscoso consentendo un recupero di energia elettrica. Lo smorzatore elettromagnetico è di tipo a magneti permanenti e il suo funzionamento si basa sul fenomeno dell’induzione elettromagnetica. Il modello matematico descrive il funzionamento dello smorzatore, restituendo i va…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineMain objective of this work is the theoretical study and support of FEM software of a device that allows for energy recovery from an automotive suspension. In replacing the viscous damper which dissipates the kinetic energy of the vehicle due to rough roads or obstacles more marked an electromagnetic damper is used that performs the functions of the viscous damper allowing a recovery of electricity. The damper is of the electromagnetic type with permanent magnets and its operation is based on the phenomenon of electromagnetic induction. The mathematical model describes the operation of the damper restoring the values of the electrical and mechanical magnitudes as a function of the relative speed between the rod and the stator. Energy recovery has been estimated considering an electric minicar that transits on a bumpy road. The recovered power has a total value of about 250W.
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