Search results for "Winding"

showing 10 items of 37 documents

A General Mathematical Formulation for the Determination of Differential Leakage Factors in Electrical Machines with Symmetrical and Asymmetrical Ful…

2018

This paper presents a simple and general mathematical formulation for the determination of the differential leakage factor for both symmetrical and asymmetrical full and dead-coil windings of electrical machines. The method can be applied to all multiphase windings and considers Gorges polygons in conjunction with masses geometry in order to find an easy and affordable way to compute the differential leakage factor, avoiding the adoption of traditional methods that refer to the Ossanna's infinite series, which has to be obviously truncated under the bound of a predetermined accuracy. Moreover, the method described in this paper allows the easy determination of both the minimum and maximum v…

010302 applied physicsComputer scienceconcentrated winding020208 electrical & electronic engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciTopology01 natural sciencesdifferential leakage factorIndustrial and Manufacturing EngineeringHarmonic analysismoment of inertiaControl and Systems EngineeringElectromagnetic coil0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringAsymmetrical windingdead-coil windingGörges polygonmultiphase windingsLeakage (electronics)
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Determination of differential leakage factors in electrical machines with non-symmetrical full and dead-coil windings

2017

In this paper Gorges polygons are used in conjunction with masses geometry to find an easy and affordable way to compute the differential leakage factor of non symmetrical full and dead coil winding. By following the traditional way, the use of the Ossanna's infinite series which has to be obviously truncated under the bound of a predetermined accuracy is mandatory. In the presented method no infinite series is instead required. An example is then shown and discussed to demonstrate practically the effectiveness of the proposed method.

010302 applied physicsConcentrated windingSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesDifferential leakage factorwindingsmoment of inertiaControl theoryElectromagnetic coil0103 physical sciencesunsymmetrical windingGörges polygonLeakage (electronics)Mathematics
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An exact method for the determination of differential leakage factors in electrical machines with non-symmetrical windings

2016

An exact and simple method for the determination of differential leakage factors in polyphase ac electrical machines with non-symmetrical windings is presented in this paper. The method relies on the properties of Gorges polygons that are used to transform an infinite series expressing the differential leakage factor into a finite sum in order to significantly simplify the calculations. Some examples are shown and discussed in order to practically demonstrate the effectiveness of the proposed method.

010302 applied physicsElectronic Optical and Magnetic Material020208 electrical & electronic engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciTopology01 natural sciencesElectronic mailElectronic Optical and Magnetic MaterialsDifferential leakage factorHarmonic analysiswindingDistribution functionmoment of inertiaElectromagnetic coil0103 physical sciences0202 electrical engineering electronic engineering information engineeringPolyphase systemGraphical modelnon-symmetrical windingElectrical and Electronic EngineeringGörges polygonLeakage (electronics)Mathematics
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Computer-aided analysis and design procedure for rotating induction machine magnetic circuits and windings

2018

The aim of this study is to present a new, accurate, and user-friendly software procedure for the analysis and rapid design of rotating induction machine windings, considering both the electric and the magnetic specifications of the machine itself. This procedure is a valid aid for quick first stage design without the necessity of using finite element method (FEM)-based design procedures. FEM can be used in a second design phase in order to refine the first stage results. The design procedure is hereafter outlined and some examples show its capability.

010302 applied physicsbusiness.industryComputer science020208 electrical & electronic engineeringAsynchronous machinesControl engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesFinite element methodMagnetic circuitDesign phaseInduction machineSoftwareElectromagnetic coil0103 physical sciences0202 electrical engineering electronic engineering information engineeringMachine windingMagnetic circuitsElectrical and Electronic EngineeringbusinessComputer aided analysis and designAsynchronous machineryComputer aided analysi
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Algorithmic Approach for Slot Filling Factors Determination in Electrical Machines

2018

In several industrial sectors, such as electric and hybrid traction, the demand for increasingly efficient and high power density electrical machines has grown considerably over the last few years. The improvement of slot filling factor of the electrical machines is an useful provision to satisfy this request. In particular, this topic has been the subject of interest for the industrial sector in recent years, since the technology of winding processes have evolved and allow an economically sustainable realization of windings with an ordered structure rather than randomly. The winding phase must be supported by an accurate design process in which it is possible to evaluate the maximum slot f…

0209 industrial biotechnologyOptimization AlgorithmComputer sciencemedicine.medical_treatmentMechanical engineeringFilling Factor OptimizationEnergy Engineering and Power Technology02 engineering and technologyHigh power density010501 environmental sciencesMagnetic wiresSettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciences020901 industrial engineering & automationmedicineElectrical and Electronic Engineering0105 earth and related environmental sciencesMagnetic WireFilling factorRenewable Energy Sustainability and the EnvironmentSlot Filling factorSense (electronics)Traction (orthopedics)WindingElectromagnetic coilDesign processRealization (systems)
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Counterdiabatic vortex pump in spinor Bose-Einstein condensates

2017

Topological phase imprinting is a well-established technique for deterministic vortex creation in spinor Bose-Einstein condensates of alkali metal atoms. It was recently shown that counter-diabatic quantum control may accelerate vortex creation in comparison to the standard adiabatic protocol and suppress the atom loss due to nonadiabatic transitions. Here we apply this technique, assisted by an optical plug, for vortex pumping to theoretically show that sequential phase imprinting up to 20 cycles generates a vortex with a very large winding number. Our method significantly increases the fidelity of the pump for rapid pumping compared to the case without the counter-diabatic control, leadin…

Angular momentumalkali metalsQuantum controlFOS: Physical sciences01 natural sciencestopological phase imprinting010305 fluids & plasmaslaw.inventionlawQuantum mechanics0103 physical sciences010306 general physicsAdiabatic processPhysicsCondensed Matter::Quantum GasesSpinorta114Winding numberBose-Einstein condensatesVortexNumerical integrationvortex pumpsQuantum Gases (cond-mat.quant-gas)Condensed Matter - Quantum GasesBose–Einstein condensatealkalimetallitPhysical Review A
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Differential Leakage Factor in Electrical Machines Equipped with Asymmetrical Multiphase Windings: a General Investigation

2019

This paper presents an investigation in terms of degree of unbalance and leakage factor of electrical machines equipped with multiphase windings. The analysis has been carried out through 4800 combinations between slots/poles/phases/layers, analyzing the variability of the leakage factor for each condition and determining the optimal region for its minimization. The obtained results demonstrate that the leakage factor could be considerably reduced with the adoption of slightly asymmetrical windings, which represent a favorable option during the early design stage of electrical machines.

Asymmetrical winding; Degree of unbalance; Electrical machines; Leakage factor; Symmetrical winding010302 applied physicsMaterials scienceDesign stage020208 electrical & electronic engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciLeakage factorSymmetrical winding01 natural sciencesElectrical machineControl theoryElectromagnetic coilElectrical machinesDegree of unbalance0103 physical sciences0202 electrical engineering electronic engineering information engineeringMinificationAsymmetrical windingLeakage (electronics)2019 Fourteenth 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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A General Mathematical Formulation for Winding Layout Arrangement of Electrical Machines

2018

Winding design methods have been a subject of research for many years of the past century. Many methods have been developed, each one characterized by some advantages and drawbacks. Nowadays, the star of slots is the most widespread design tool for electrical machine windings. In this context, this paper presents a simple and effective procedure to determine the distribution of the slot EMFs over the phases and of the winding configuration in all possible typologies of electrical machines equipped with symmetrical windings. The result of this procedure gives a Winding Distribution Table (WDT), which can be used to define coils and coil groups connections and also to simply implement winding…

Control and OptimizationComputer scienceEnergy Engineering and Power TechnologyMechanical engineeringContext (language use)02 engineering and technologyStar (graph theory)Settore ING-IND/32 - Convertitori Macchine E Azionamenti Elettricilcsh:Technology01 natural sciencesstar of slotsSimple (abstract algebra)0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringEngineering (miscellaneous)010302 applied physicselectrical machineslcsh:TRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringwinding designElectromagnetic coilTable (database)symmetrical windingelectrical machines; winding design; symmetrical winding; star of slotsEnergy (miscellaneous)
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A General Investigation on the Differential Leakage Factor for Symmetrical and Asymmetrical Multiphase Winding Design

2020

This work provides an investigation based on a fast estimation of the degree of unbalance (D.U.%) and the differential leakage factor (&sigma

Control and Optimizationunbalance degreeEnergy Engineering and Power Technologysymmetrical windings02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciMachine designTopology01 natural scienceslcsh:TechnologyComputer Science::Hardware ArchitecturePhysics::Popular Physics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringEngineering (miscellaneous)MathematicsLeakage (electronics)010302 applied physicselectrical machinesDesign stageRenewable Energy Sustainability and the Environmentlcsh:T020208 electrical & electronic engineeringasymmetrical windingswinding designdifferential leakage factorFinite element methodElectromagnetic coilAsymmetrical windings; Differential leakage factor; Electrical machines; Symmetrical windings; Unbalance degree; Winding designMinificationEnergy (miscellaneous)Energies
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