Search results for "permanent magnet"

showing 10 items of 78 documents

A Self-Contained Electro-Hydraulic Cylinder: Modeling, Control Design, Simulation and Experimental Validation

2018

Master's thesis Mechatronics MAS500 - University of Agder 2018 In the constant effort to improve the efficiency of hydraulic systems, the pressure drop over hydraulic valves has been one of the major obstacles. In the Self-Contained Electro-Hydraulic Cylinder, the directional valve and the hydraulic power unit have been replaced by a bi-directional axial piston pump and a Permanent Magnet Synchronous Motor. Actuation of the cylinder is performed by controlling the direction of rotation and the velocity of the motor. Originally the purpose of this project was to: "Design a proper control algorithm for an existing novel selfcontained electro-hydraulic cylinder, implement it on the main boom o…

Axial Piston PumpVDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550::Teknisk kybernetikk: 553Control DesignFluid PowerVDP::Teknologi: 500::Maskinfag: 570MAS500Asymmetric ActuatorPermanent Magnet Synchronous MachineExperimentsElectric DrivesModellingSelf-Contained Electro Hydraulic CylinderPassive Load Holding
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An Experimental Comparison between an Ironless and a Traditional Permanent Magnet Linear Generator for Wave Energy Conversion

2022

Permanent Magnet Linear Generators (PMLGs) are currently being studied for sea wave energy harvesting. Typically, a PMLG consists of an iron-made armature and a moving translator. The permanent magnets adoption produces parasitic effects, such as cogging force, and the machine weight increment. A solution could be the adoption of an ironless configuration, accepting a power density reduction. This paper investigates the use of ironless PMLGs in sea wave energy conversion systems by an experimental comparative analysis between an iron PMLG prototype and an ironless PMLG prototype, which share the same geometry. The main electrical and mechanical parameters (resistance, mass, and magnetic fie…

Settore ING-IND/11 - Fisica Tecnica AmbientaleControl and OptimizationRenewable Energy Sustainability and the EnvironmentEnergy Engineering and Power Technologyironless electrical machines linear electrical machines permanent magnet generators (PMG) Permanent Magnet Linear Generators (PMLG)Settore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciElectrical and Electronic Engineeringlinear electrical machines; ironless electrical machines; permanent magnet generators (PMG); Permanent Magnet Linear Generators (PMLG)Engineering (miscellaneous)Energy (miscellaneous)Energies
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Enhanced mathematical modelling of interior permanent magnet synchronous machines for loss minimization control

2020

Energy management is a fundamental facility for humanity. At present, the awareness that renewable energy cannot satisfy the entire energy needs of the community and that traditional energy sources have a limited duration makes it imperative to address the problem of their careful and responsible use. Therefore, the need for an intelligent and functional use of energy has led the technical-scientific community to concentrate its efforts on the issues of sustainable development and energy savings. The electric drives industrial sector has suffered this influence in a visceral way. This sector plays a leading role in the industrial frame as it is one of the main consumers of electricity. More…

Settore ING-IND/32 - Convertitori Macchine E Azionamenti Elettriciinterior permanent magnet synchronous machines
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Design and Performance of a High Temperature Superconducting Axial Flux Generator

2013

In this paper, a high temperature axial flux (HTSAF) generator is presented. In this generator the excitation of the generator is obtained by using some high temperature superconducting magnets. In order to reduce the negative effects of vibrations, the excitation is located on the stationary part of the generator. Starting, running and endurance tests of the machine are presented.

PhysicsSuperconductivityGenerator (computer programming)Superconducting electric machineMechanicsSuperconducting magnetPermanent magnet synchronous generatorSuperconducting magnetic energy storageTerms—Superconducting materials magnetic materials electric machines power systemsElectronic Optical and Magnetic Materialslaw.inventionNuclear magnetic resonancelawMagnetElectrical and Electronic EngineeringExcitationIEEE Transactions on Magnetics
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Assessment of energy management technique for achieving the sustainable voltage level during grid outage of hydro generator interfaced DC Micro-Grid

2021

Abstract An appropriate energy management scheme is needed for the reliable and sustainable operation of DC microgrid. The energy management scheme of DC microgrid (MG) is mainly controlled by main energy resource of MG. Main energy resource needs to be dispatchable unit for forming the reference voltage within DC MG. In this work, a micro hydro generator (MHG) is considered as a dispatchable source for forming the sustainable voltage level of DC MG operating under the abnormal condition. In this work, the abnormality refers to the outage of solar PV due to intermittency during fluctuating load condition. But, due to mechanical time constant of MHG and rate of charging/discharging current l…

Renewable Energy Sustainability and the EnvironmentComputer science020209 energyMicro hydroEnergy Engineering and Power Technology02 engineering and technologyPermanent magnet synchronous generatorEnergy storagePower (physics)020401 chemical engineeringControl theory0202 electrical engineering electronic engineering information engineeringMicrogrid0204 chemical engineeringDispatchable generationVoltage referenceSustainable Energy Technologies and Assessments
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Efficiency Enhancement of Permanent-Magnet Synchronous Motor Drives by Online Loss Minimization Approaches

2005

In this paper, a new loss minimization control algorithm for inverter-fed permanent-magnet synchronous motors (PMSMs), which allows for the reduction of the power losses of the electric drive without penalty on its dynamic performance, is analyzed, experimentally realized, and validated. In particular, after a brief recounting of two loss minimization control strategies, namely, the "search control" and the "loss-model control," both a new modified dynamic model of the PMSM (which takes into account the iron losses) and an innovative "loss-model" control strategy are presented. Experimental tests on a specific PMSM drive employing the proposed loss minimization algorithm have been performed…

Permanent magnet synchronous motorControl and Systems EngineeringComputer scienceControl theoryControl engineeringLoss minimizationElectrical and Electronic EngineeringSynchronous motorMachine controlIEEE Transactions on Industrial Electronics
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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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Electrostatic synchronous generator model of an Inverter-Based Distributed Generators

2015

In this paper, the idea of modelling the Inverter-Based Distributed Generators by using the concept of Electrostatic synchronous machines is discussed. A mathematical model of the inverter has been established which depends on the dc bus voltage, modulation index and frequency of the system. Two mathematical models have been developed: a small signal model and a steady-state model. These mathematical models will be helpful in studying the stability of a microgrid; especially when studying the transient stability performance of on-grid operation of converter-based distributed generator with multi-machine microgrid. Simulation results using Matlab/Simulink are carried out.

EngineeringMathematical modelMicrogridbusiness.industryRenewable Energy Sustainability and the EnvironmentModulation indexEnergy Engineering and Power TechnologyPermanent magnet synchronous generatorDistributed GeneratorSmall-signal modelStability of microgridSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaComputer Science::Hardware ArchitectureElectrostatic Synchronous MachineElectronic engineeringInverterMicrogridTransient (oscillation)businessMATLABcomputercomputer.programming_language
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A study on the influence of permanent magnet dimensions and stator core structures on the torque of the disc-type brushless DC motor

2000

This paper presents a three-dimensional analysis of the magnetic field distribution for a disc-type, double-sided, permanent magnet, brushless dc motor with a toroidal stator core. Calculations are carried out using the OPERA (3D) package with the TOSCA module. The electromagnetic torque is determined from the Maxwell stress tensor. For comparison, various permanent magnet dimensions and slotless vs. quasi-slotted stator cores are analysed, with an iron powder-resin composite effectively used to imitate the slotted core. The torque ripple is shown to be effectively reduced by appropriate permanent magnet dimensions. The simulation results are in good agreement with experimental data obtaine…

EngineeringElectropermanent magnetStatorbusiness.industryApplied MathematicsElectrical engineeringMechanical engineeringPermanent magnet synchronous generatorMaxwell stress tensorDC motorlaw.inventionlawMagnetTorque rippleElectrical and Electronic EngineeringbusinessSynchronous motorElectrical Engineering (Archiv fur Elektrotechnik)
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