Search results for "Modula"

showing 10 items of 1481 documents

Simulation of a single-phase five-level cascaded H-Bridge inverter with multicarrier SPWM B-Spline based modulation techniques

2017

Multilevel Power Inverters are now often used to convert DC to AC voltage waveform. This kind of converter allows high power quality with low output harmonics and lower commutation losses with respect to the traditional ones in order to optimize this aspect. This paper presents a novel simulation analysis of the Multicarrier Sinusoidal Pulse Width Modulation (MC SPWM) techniques B-Spline functions based to control the switches of five-level single-phase cascaded H-bridge inverter. In order to verify the performance of the converter, the harmonic content of the voltage due to modulation techniques has been taken into account. Results highlight the comparison between different B-Spline functi…

Engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciences010309 optics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringMultilevel power converterWaveformCommutationElectrical and Electronic EngineeringRenewable Energy Sustainability and the Environmentbusiness.industryB-spline function020208 electrical & electronic engineeringMulticarrier modulation techniquePower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaModulationHarmonicsAutomotive EngineeringHarmonicInverterbusinessPulse-width modulation2017 Twelfth International Conference on Ecological Vehicles and Renewable Energies (EVER)
researchProduct

New approach for harmonic mitigation in single-phase five-level CHBMI with fundamental frequency switching

2017

The main objective of this paper is to study and analyse the voltage output waveform of a multilevel inverter, to suggest a new approach for harmonic mitigation improving the converter performance. These last type of converters represent a new technology in the field of DC/AC electrical energy conversion, presenting advantages respect to the traditional converters. In fact, the multilevel power converters present a low harmonic content and a high voltage level. The paper considers a five-level single-phase cascaded H-bridge inverter and fundamental frequency modulation techniques. The voltage waveform analysis has allowed to identify a working area of the converter where there are lowest va…

Engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciences010309 optics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringWaveformRenewable EnergyElectrical and Electronic EngineeringMultilevel Power ConverterMultilevel Power Converter; Phase Shifted Voltage Cancellation; Soft switching; Renewable Energy Sustainability and the Environment; Automotive Engineering; Electrical and Electronic EngineeringSustainability and the Environmentbusiness.industryRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringElectrical engineeringFundamental frequencyConvertersSoft switchingPower (physics)Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaPhase Shifted Voltage CancellationModulationAutomotive EngineeringHarmonicInverterbusinessVoltage
researchProduct

Experimental analysis with FPGA controller-based of MC PWM techniques for three-phase five level cascaded H-bridge for PV applications

2016

The FPGA represents a valid solution for the design of control systems for inverters adopted in the field of PV systems because of their high flexibility of use. This paper presents an experimental analysis of the MC SPWM techniques for a three-phase, five-level, cascaded H-Bridge inverter with FPGA controller-based. Several control algorithms are implemented by means of the VHDL programming language and the output voltage waveforms obtained from the main PWM techniques are compared in terms of THD%. Simulation and experimental results are analysed, compared and discussed.

Engineering020209 energyEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciGrid connectedControl theoryVHDL0202 electrical engineering electronic engineering information engineeringElectronic engineeringMultilevel power converterRenewable EnergyField-programmable gate arrayFPGAcomputer.programming_languageTotal harmonic distortionSustainability and the EnvironmentRenewable Energy Sustainability and the Environmentbusiness.industry020208 electrical & electronic engineeringH bridgeSettore ING-IND/31 - ElettrotecnicaControl systemInverterVHDLbusinessFPGA; Grid connected; Multilevel power converter; Photovoltaic; VHDL; Energy Engineering and Power Technology; Renewable Energy Sustainability and the EnvironmentPhotovoltaiccomputerPulse-width modulation2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA)
researchProduct

Modular, customisable, accomodation-friendly antenna system for satellite avionics: Development, prototyping and validation

2014

In the frame of ESA program AO/1- 6737/11/NL/MH, an innovative X-band antenna system for satellite avionics has been studied, demonstrated and validated at Proof of Concept Model level. The innovative contribution of such an antenna system relies on modularity, customizability and accommodation friendliness. The antenna concept is based on a Plug and Play architecture, where the basic module is a 2.7 cm-cube with a mass of 53 gr, which can be clustered in array configuration. A catalogue of predefined and ready-to-use clusters could be developed with the possibility of adapting the antenna systems to various platform types by tuning just a few control parameters. Different levels of customi…

EngineeringAvionics Plug and Play architecture modularity customizability bonding wires PIFA measurements simulations.Plug and playbusiness.industryConformal antennaFrame (networking)Modular designAvionicsModularitySettore ING-INF/01 - ElettronicaSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Proof of conceptAntenna (radio)businessSimulationAntenna satellite
researchProduct

5-axes modular CNC machining center

2017

The paper presents the development of a 5-axes CNC machining center. The main goal of the machine was to provide the students a practical layout for training in advanced CAM techniques. The mechanical structure of the machine was built in a modular way by a specialized company, which also implemented the CNC controller. The authors of this paper developed the geometric and kinematic model of the CNC machining center and the post-processor, in order to use the machine in a CAM environment.

EngineeringControl theorybusiness.industrylcsh:TA1-2040Numerical controlMechanical engineeringCenter (algebra and category theory)ComputerApplications_COMPUTERSINOTHERSYSTEMSKinematicsModular designbusinesslcsh:Engineering (General). Civil engineering (General)MATEC Web of Conferences
researchProduct

Electric Power Quality Evaluation in the Presence of Electromagnetic Emissions

2013

The measurements for the assessment of the electric power quality are often carried out in hostile electromagnetic environments. The aim of the paper is analyzing if and how both radiated and conducted electromagnetic emissions can disturb the measurement system used to quantify these disturbances. To achieve the target, an experimental approach is proposed, which, by means of a simple and fast test, allows establishing if the real electromagnetic environment, where power quality analysis is performed, can alter the measurements. © 2013 IEEE.

EngineeringElectric power qualityradiated electromagnetic emissionElectromagnetic environmentpower measurementpower supply qualityelectromagnetic waveSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciElectromagnetic radiationelectric power quality measurementFrequency measurementElectronic engineeringpower system faultFrequency modulationconducted electromagnetic emissionpower quality analysisdisturbancebusiness.industrySystem of measurementElectromagnetic compatibilitypower quality analysiVoltage measurementInstrumentTime measurementelectromagnetic immunity; power quality analysisStandardElectromagneticmeasurement systemelectromagnetic immunityPower qualityhostile electromagnetic environmentbusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche
researchProduct

Modular fault diagnosis based on discrete event systems for a mixer chemical process

2003

The knowledge of failure type and their location is an indispensable requirement for the establishment of tasks of adequate recovery strategies and maintenance of both factory automation and process control systems. The failure diagnosis methodology presented in the paper is based on discrete event systems models and on the diagnosers concept, those which permit the analysis off-line and online of diagnosability of failures that can occur in the processes. We present an approach for models and associated diagnosers based on a modular decomposition of the global system, with the purpose of avoiding the problems of the exponential explosion of the number of states and of the computational com…

EngineeringFinite-state machinebusiness.industryEvent (computing)Process (engineering)Knowledge engineeringProcess controlPetri netModular designbusinessAutomationReliability engineering
researchProduct

A New Low Cost Coupling System for Power Line Communication on Medium Voltage Smart Grids

2018

This paper proposes and verifies the performance of an innovative and low cost coupling system for power line communication (PLC) on medium voltage (MV) smart grids. The coupling system makes use of the capacitive divider of the voltage detecting systems (VDSs) to inject and receive the PLC signal. VDS are usually already installed in the MV switchboards of the major electrical manufacturer all over the world according to IEC 61243-5. VDS are used to detect the presence of the mains voltage to guarantee personnel safety. An interface circuit has been developed to be connected between the PLC transceiver and the VDS socket. In this way, the PLC signal can be coupled to the MV network without…

EngineeringGeneral Computer Sciencebusiness.industry020209 energycommunication systems; couplers; narrow band power line communication; Power system communication; power system communication; power system measurements; smart grids020208 electrical & electronic engineeringElectrical engineering02 engineering and technologyCapacitanceSignalPower-line communicationSmart gridModulationPower system communication communication systems couplers narrow band power line communication communication signal couplers power system communication power system measurements smart grids.0202 electrical engineering electronic engineering information engineeringElectronic engineeringcommunication signal couplersTransceiverbusinessElectrical impedanceSettore ING-INF/07 - Misure Elettriche E ElettronicheVoltage
researchProduct

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
researchProduct

Determination of boundaries between ranges of high and low gradient of beam profile

2016

Abstract Aim This work addresses the problem of treatment planning system commissioning by introducing a new method of determination of boundaries between high and low gradient in beam profile. Background The commissioning of a treatment planning system is a very important task in the radiation therapy. One of the main goals of this task is to compare two field profiles: measured and calculated. Applying points of 80% and 120% of nominal field size can lead to the incorrect determination of boundaries, especially for small field sizes. Materials and methods The method that is based on the beam profile gradient allows for proper assignment of boundaries between high and low gradient regions …

EngineeringMathematical optimizationField (physics)business.industrydose gradientWork (physics)Extremely HelpfulIntensity-modulated radiation therapy030218 nuclear medicine & medical imagingComputational physics03 medical and health sciences0302 clinical medicineTPS commissioningOncology030220 oncology & carcinogenesisField sizebeam profileRadiology Nuclear Medicine and imagingPoint (geometry)Low gradientOriginal Research ArticlebusinessBeam (structure)
researchProduct