Search results for "Tito"

showing 10 items of 719 documents

Competition Policy in the Italian Economy: Current Developments and Lines of Action

2016

Presentation to the Italian Parliament of the 2015 Annual Report of the Italian Competition Authority. Rome, 18 June 2015

Competition policy - competiton law - italian economy -developments - actionsSettore IUS/08 - Diritto Costituzionale
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L’interdipendenza delle obbligazioni nella compravendita conclusa tramite intermediario libero (‘institor’ o ‘procurator’)

2007

Il lavoro si occupa dell'interdipendenza delle prestazioni nell'ambito del negozio di compravendita nelle fonti del diritto romano.In particolare, il problema viene studiato in relazzione alle compravendite concluse da un intermediario, institor o procurator.

Compravendita interdipendenza delle obbligazioni procurator institor diritto romano.
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Enhanced Mathematical Modelling of Interior Permanent Magnet Synchronous Machine Considering Saturation, Cross-Coupling and Spatial Harmonics effects

2020

The Interior Permanent Magnet Synchronous machine (IPMSM) conventional mathematical model is generally employed to investigate and simulate the IPMSM control and drive system behaviour. However, magnetic nonlinearities and spatial harmonics have a substantial influence on the IPMSM electromagnetic behaviour and performances. In order to simulate the IPMSM real electromagnetic behaviour, this paper describes an enhanced mathematical model that takes into account the saturation, cross-coupling and spatial harmonics effects. This model has been implemented in Matlab®/Simulink environment where the electric and magnetic parameters are derived from FEA investigations and implemented by the use o…

Computer science020208 electrical & electronic engineering05 social sciences02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciFinite element methodSpatial harmonicsCross-coupling Finite Element Analysis (FEA) Interior Permanent Magnet Synchronous Machine (IPMSM) saturation spatial harmonicsHigh fidelityControl theoryLookup table0202 electrical engineering electronic engineering information engineering0501 psychology and cognitive sciencesSaturation (magnetic)Permanent magnet synchronous machine050107 human factors2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
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The use of slightly asymmetrical windings for rotating electrical machines

2018

Historically, asymmetrical windings in electrical machines have been rarely used and only for specified needs, because the adoption of symmetrical configurations has always been considered the only solution during the design stage of electrical machines. The aim of this work is to demonstrate with several examples that the use of slightly asymmetrical windings can be a reasonable choice and, in certain cases, a favorable option during the machine design stage, allowing the possibility of selecting a wider range of slot/pole number combinations, without affecting the performances of the machines. More in detail, an interior permanent magnet synchronous machine equipped with a symmetrical 3-p…

Computer science020209 energy020208 electrical & electronic engineeringWinding designCogging torqueMechanical engineeringEnergy Engineering and Power Technology02 engineering and technologyCogging torqueSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciModeling and simulationHarmonic analysisElectromagnetic coilModeling and Simulation0202 electrical engineering electronic engineering information engineeringAsymmetrical windingElectrical and Electronic EngineeringFEM analysiHarmonic analysi
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Feedback linearization control of wind turbine equipped with doubly fed induction generator

2017

This paper focuses on several control techniques of a wind turbine of rated power of about 1 MW. In particular, a wind generator equipped with an asynchronous doubly-fed induction machine has been considered and its dynamic model in MATLAB/SIMULINK environment has been implemented. Starting from this model the feedback linearization control has been derived, and several simulations have been carried out, with the aim of compare its dynamic performances with the classical field oriented control, and with the V/f control. The results allow us to conclude that a DFIG controlled by a feedback linearization technique ensures better dynamic performance.

Computer science020209 energyControl (management)Biomedical EngineeringEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciTurbinedynamic performancelaw.inventionSettore ING-INF/04 - AutomaticaControl theorylaw0202 electrical engineering electronic engineering information engineeringFeedback linearizationDoubly-fed induction generatorMATLABcomputer.programming_languageVector controlRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringfeedback linearization controlPower ratingAsynchronous communicationDoubly fed electric machinecomputer
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Performance Evaluation of a Three- Phase Five-Level Quasi-Z-Source Cascaded H-Bridge for Grid-Connected Applications

2018

In the field of the PV generation, Quasi-Z-source cascaded H-bridge (qZS-CHB) inverters are promising due to their features of modularity and high voltage conversion ratio. Thus, new topology structures and innovative modulation techniques are continuously being developed to improve the performance in terms of voltage stress and harmonic content. This paper proposes an innovative modulation technique that allows reducing the voltage stress and a specially designed grid-connected control strategy is also introduced. Through simulations in MATLAB, it has been validated that the performance of a three-phase five-level qZS-CHB is improved with the proposed solution.

Computer science020209 energyEnergy Engineering and Power TechnologyTopology (electrical circuits)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciPV systemsmodulation techniquesharmonicharmonics0202 electrical engineering electronic engineering information engineeringElectronic engineeringElectrical and Electronic EngineeringMATLABcomputer.programming_languageQuasi-Z-source cascaded H-Bridge inverters020208 electrical & electronic engineeringHigh voltageH bridgeQuasi-Z-source cascaded H-Bridge inverterSettore ING-IND/31 - ElettrotecnicaThree-phasemodulation techniqueHarmonicsHarmoniccomputerPV systemVoltage
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Energy saving and user satisfaction for a new advanced public lighting system

2019

Abstract The retrofit of urban lighting systems is often an advantageous means of achieving notable energy savings and improvements in the quality of light. User habits, expectations and lifestyle can contribute to the design of these systems, for example in deciding on the most appropriate control strategies or the light quality. The influence of such variables can be extended to the overall system performance. This paper presents a method of street lighting design based on two kinds of analysis carried out in a defined test area: measurements (by means of a monitoring study) and user preferences (by means of a survey). The results of this data analysis create the basis for the final desig…

Computer science020209 energymedia_common.quotation_subjectControl (management)Energy Engineering and Power TechnologySample (statistics)User satisfaction02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSmart lightingTransport engineering020401 chemical engineering0202 electrical engineering electronic engineering information engineeringQuality (business)0204 chemical engineeringSmart lightingmedia_commonRate of returnInformation and communication technology integrationSettore ING-IND/11 - Fisica Tecnica AmbientaleRenewable Energy Sustainability and the EnvironmentLighting designTest (assessment)Light qualitySettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaEnergy efficiencyFuel TechnologyNuclear Energy and EngineeringEfficient energy useEnergy Conversion and Management
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A Novel Symmetrical Boost Modulation Method for qZS-based CHB Inverters

2020

Quasi-Z-source cascaded H-bridge (qZS-CHB) inverters are arising as an innovation in the field of the electrical conversion for PV applications. This type of converters inherit the advantages of multilevel inverters and single-stage configuration. In this context, this paper proposes a novel symmetrical boost modulation strategy for qZS CHB multilevel inverters to increase the performance in terms of voltage stresses and power quality. The novelty lies in the adoption of a different concept to generate the shoot-through states compared to the traditional methods. Simulation analysis in a grid connected application to evaluate the benefits of this boost method is performed in the MATLAB/PLEC…

Computer scienceContext (language use)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici7. Clean energy01 natural sciencesHarmonic analysisharmonics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringquasi-Z source cascaded H-Bridge multilevel invertersMATLABcomputer.programming_language010302 applied physics020208 electrical & electronic engineeringConvertersGridboost methodgrid-connected applicationcomputerPhase modulationPulse-width modulationPV systemVoltage2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
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Experimental Prototyping of a Microgrid with Mechanical Point of Common Coupling

2020

The smartgrid is a key technology for the sustainable and smart utilization of the renewable energies. In this paper, a prototyping of a microgrid, assembled at the Sustainable Development and Energy Saving Laboratory (SDESLAB) of the University of Palermo, is presented and discussed. In detail, the microgrid presents only one mechanical point of common coupling (PCC) with the main grid and it is electrically separated from the main grid. In this way, the voltage variations of the main grid do not affect the microgrid electric quantities behavior. In order to validate the effectiveness of the voltage and frequency control, several experimental tests and analysis have been carried out. In de…

Computer scienceControl engineeringMicrogrid Buck converter LCL Filter grid connection.Point of common couplingMicrogridSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici2020 8th International Conference on Smart Grid (icSmartGrid)
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Comparative Analysis of Modified Modulation Scheme for Three-phase Voltage fed QZS Inverters

2019

Single-stage converters are one promising solution in different field of applications. In particular, quasi-Z-Source VSI topology structure playsan important role because it presents the same advantages of VSI and qZS converters. In addition, it allows increasing the inverter reliability. Moreover, modulation schemes and control strategy are still being developed. For this reason, aim of this paper is to introduce a modified modulation scheme based on the Maximum Constant Boost Control (MCBC) concept and Switching Frequency Optimal (SFO)as reference signals that represents the novelty issue of this work. The analysis has been carried out by comparing the performance of the converter in term…

Computer scienceQuasi-Z-source InverterHarmonicTopology (electrical circuits)Settore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciConvertersModulation techniqueSettore ING-IND/31 - ElettrotecnicaReliability (semiconductor)Three-phaseModulationControl theoryHarmonicsInverterVoltage stressVoltage2019 8th International Conference on Renewable Energy Research and Applications (ICRERA)
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