Thematische Bibliographien / Electrical machine calculation

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Auswahl der wissenschaftlichen Literatur zum Thema „Electrical machine calculation“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Electrical machine calculation"

Podgornovs, Andrejs, und Antons Sipovichs. „Electromechanical Battery EMB Mass Minimization taking into Account its Electrical Machines Rotor Energy“. Electrical, Control and Communication Engineering 7, Nr. 1 (01.12.2014): 5–10. http://dx.doi.org/10.1515/ecce-2014-0017.

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Abstract In this paper the electromechanical battery (EMB) with synchronous machine is described. Theoretically, if electrical machines rotor stored energy is known, it is possible to reduce the flywheel mass of electromechanical battery. For example, the efficiency of energy recovery (kilowatt-hours out versus kilowatthours in) in nowadays appliances exceeds 95 % which is considerably better than of any electrochemical battery, such as lead-acid battery. For the rotor stored energy amount calculation, it is necessary to find all geometrical dimensions of the electrical machine. To achieve this goal the iterative calculation method was used. Electromechanical battery mass was analyzed as a discharge process rotation speed function. Taking into account the rotor stored energy, we can increase the minimum rotation speed thus reducing the electrical machine mass and increasing the flywheel mass, which provides EMB cost reduction. Additionally, the possibilities of using numerical approximation calculations of magnetization curves are discussed. Each iteration of numerical application necessary for the method for rapid calculation is essential when calculating the field problems. Nowadays there are a lot of computer added design programs for electromagnetic field calculation in different types of applications, electrical machines and apparatus. For the electromagnetic field calculation process some more commonly used magnetization curve approximation methods are described, and the machine calculation time is tested for different numbers of calculations.

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Froidurot, B., L. L. Rouve, A. Foggia, G. Meunier und J. P. Bongiraud. „Calculation of electrical machine magnetic stray fields“. IEE Proceedings - Science, Measurement and Technology 149, Nr. 5 (01.09.2002): 190–93. http://dx.doi.org/10.1049/ip-smt:20020623.

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Hatziathanassiou, V., J. Xypteras und G. Archontoulakis. „Electrical-thermal coupled calculation of an asynchronous machine“. Archiv für Elektrotechnik 77, Nr. 2 (Januar 1994): 117–22. http://dx.doi.org/10.1007/bf01578534.

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Jumayev, Sultan, Aleksandar Borisavljevic, Konstantin Boynov, Juha Pyrhönen und Elena A. Lomonova. „Inductance calculation of high-speed slotless permanent magnet machines“. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, Nr. 2 (02.03.2015): 413–27. http://dx.doi.org/10.1108/compel-08-2014-0207.

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Purpose – The purpose of this paper is to give a simple, fast and universal inductance calculation approach of slotless-winding machines and comparison of inductances of toroidal, concentrated and helical-winding machines, since these winding types are widely used among low-power PM machines. Design/methodology/approach – Harmonic modeling approach is applied to model the magnetic field of the windings in order to calculate the synchronous inductances. The method is based on distinction between electromagnetic properties of different regions in the machine where each region is represented by its own governing equation describing the magnetic field. The governing equations are obtained from Maxwell’s equations by introducing vector potential in order to simplify the calculations. Findings – Results of the inductances of toroidal, concentrated and helical-winding slotless PM machines, which have the same torque and dimensions, obtained by the proposed analytical method are in good agreement with 3D FEM, where the relative difference is smaller than 15 percent. However, the calculation time of the analytical method is significantly less than in 3D FEM: seconds vs hours. Additionally, from the results it is concluded that the toroidal-winding machine has the highest inductance and DC resistance values among considered machines. Helical-winding machine has lowest inductance and DC resistance values. Inductance of concentrated-winding machine is between inductance of helical and toroidal windings; however, DC resistance of the concentrated windings is comparable with resistance toroidal windings. Originality/value – In this paper the inductance calculation based on harmonic modeling approach is extended for toroidal and helical-winding machines which makes the method applicable for most of the slotless machine types.

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Ginzarly, Riham, Ghaleb Hoblos und Nazih Moubayed. „From Modeling to Failure Prognosis of Permanent Magnet Synchronous Machine“. Applied Sciences 10, Nr. 2 (19.01.2020): 691. http://dx.doi.org/10.3390/app10020691.

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Due to the accelerating pace of environmental concerns and fear of the depletion of conventional sources of energy, researchers are working on finding renewable energy sources of power for different axes of life. The transportation sector has intervened in this field and introduced hybrid electric vehicles. Many complaints have been mentioned concerning fault detection and identification in the vehicle to ensure its safety, reliability and availability. Diagnosis has not been able to overcome all these concerns, and research has shifted toward prognosis, where the manufacturing sector is urged to integrate fault prognosis in the vehicle’s electrical powertrain. In this article, prognosis of the vehicle’s electrical machine is treated using a hidden Markov model after modeling the electrical machine using the finite element method. Permanent magnet machines are preferable in this application. The modeling of the machine is a combination of the electromagnetic, thermal and vibration finite element models. The considered faults are demagnetization, turn-to-turn short circuit and eccentricity. A strategy for the calculation of the remaining useful life (RUL) is suggested when a turn-to-turn short circuit fault occurs.

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Stepanov, Anatoly N., und Irina P. Stepanova. „CALCULATION OF THE EXTERNAL MAGNETIC FIELD OF AN ELECTRICAL MACHINE“. Scholarly Notes of Komsomolsk-na-Amure State Technical University 1, Nr. 10 (30.06.2012): 31–37. http://dx.doi.org/10.17084/2012.ii-1(10).5.

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KOVALEV, Konstantin. „Methodic of calculation of fully HTS silent-pole electrical machine“. PRZEGLĄD ELEKTROTECHNICZNY 1, Nr. 1 (05.01.2019): 215–20. http://dx.doi.org/10.15199/48.2019.01.51.

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Patsios, Charalampos, Minos E. Beniakar, Antonios G. Kladas und John Prousalidis. „A Simple and Efficient Parametric Design Approach for Marine Electrical Machines“. Materials Science Forum 792 (August 2014): 367–72. http://dx.doi.org/10.4028/www.scientific.net/msf.792.367.

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In this paper a parametric design procedure of electrical machines used in naval propulsion systems is developed. The algorithm uses a series of design characteristics i.e. the type of the machine, the winding configuration and key geometrical properties, as parameters and is implemented on MATLAB® script allowing for a straightforward incorporation with other development tools. Using the proposed algorithm, two of the most common machine configurations involved in marine electrical propulsion systems i.e. the Induction Motor and the Synchronous Permanent Magnet Motor, are designed and 2D finite element modeling and analysis is performed. MATLAB® is used to interact with the FEMM software package through ActiveX framework, allowing for a detailed calculation of the electromagnetic properties of the machines examined.

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Loginov, Sergei, Yulia Domracheva, Vadim Smirnov und Dmitriy Fedorov. „Research of Radial Forces and Torque of Bearingless Synchronous Machine“. Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (16.06.2015): 128. http://dx.doi.org/10.17770/etr2015vol1.217.

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Bearingless synchronous machine (BSM) is an electrical machine which rotor is suspended by electromagnetic forces (not ball bearings). It allows achieving ultra-high rotation speed and significantly extending area of electric drive application. Nowadays there are different variants of the machines with the structural design and the searching of optimal solution is going on. The basic calculation parameters of bearingless machines are radial forces that can withstand the rotor from external load and torque produced on the shaft. This article describes the theoretical results based on a computer model that produces the finite element method and experimental study of the BSM prototype.

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Rens, Jan, Lode Vandenbossche und Ophélie Dorez. „Iron Loss Modelling of Electrical Traction Motors for Improved Prediction of Higher Harmonic Losses“. World Electric Vehicle Journal 11, Nr. 1 (11.03.2020): 24. http://dx.doi.org/10.3390/wevj11010024.

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A Finite Element (FE) modelling approach is presented to account for the core losses in electrical machines that are generated by higher harmonic frequencies, for example those caused by Pulse Width Modulation (PWM) switching or by space harmonics due to the machine geometry. The model builds further on a post-processing calculation tool that was recently developed to take into account the magnetic skin effect in electrical steel laminations at high frequencies, and extends this by a more detailed loss analysis of the minor hysteresis loops that are caused by the higher harmonics. Further, these tools for high-frequency loss analysis are integrated into a complete electrical machine model with separate consideration of the major and minor loops. The modelling approach relies strongly on extensive magnetic measurement data of the electrical steel, in order to accurately predict the different loss components for minor hysteresis loops as a function of the DC bias field, frequency and amplitude of the minor loop. Results from the model are shown for an automotive traction motor, illustrating the losses caused by PWM harmonics and demonstrating the relevance of including the skin effect in these calculations.

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Dissertationen zum Thema "Electrical machine calculation"

Papini, Luca. „Performance calculation of high speed solid rotor induction machine“. Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52180/.

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Solid rotor induction machines are suitable for applications which require robustness, reliability and high rotational speed. A literature review of high speed technologies is initially presented. The current limitation and challenges are detailed based on a wide collection of data. The multi-physics aspect related with electrical machines for high speed applications are discussed providing a summary of the current state of the art. The main aim of the research was to develop a multi-physic computational environment for the design and analysis of solid rotor induction machines. The electromagnetic, thermal, structural and rotor dynamics models have been developed targeting reduced computational time and accurate predictions. Numerical techniques are proposed based on the discretisation of the computational domain. The different disciplines are linked together providing a flexible and powerful tool for the characterisation of solid rotor induction machine. Another objective was to investigate the impact of the rotor material on the electromagnetic performances of the machine. Finite Element simulation are used to account for the non linear magnetic properties. The impact on the equivalent circuit parameter is discussed and general criteria for material selection presented. Three dimensional finite element calculation are p erformed targeting the validation of the end region correction factor and select the rotor length. The performances of a 120 [kW]−25000 [rpm] solid rotor machine are compared with a caged rotor induction machine for waste heat recovery application.

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Randewijk, Peter-Jan. „Analysis of a radial flux-air-cored permanent magnet machine with a double-sided rotor and non overlapping windings“. Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20246.

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Thesis (PhD)--Stellenbosch University, 2012.
ENGLISH ABSTRACT: In this dissertation a new type of electrical machine, a Radial Flux Air-Cored Permanent Magnet machine with a Double-sided Rotor and utilising concentrated, non-overlapping windings, is proposed. The concept of the Double-sided Rotor Radial Flux Air-Cored Permanent Magnet machine, or RFAPM machine for short, was derived from the Double-sided Rotor Axial Flux Air-Cored Permanent Magnet (AFAPM) machine. One of the problems that AFAPM machines experience, is the deflection of the rotor discs due to the strong magnetic pull of the permanent magnets, especially with double-sided rotor machines. The main advantage of a RFAPM machine over a AFAPM machine is that the rotor back-iron is cylindrically shaped instead of disk shaped. Due to the structural integrity of a cylinder, the attraction force between the two rotors does not come into play any more. The focus of this dissertation is on a thorough analytical analysis of the Double-Sided Rotor RFAPM machine. With the RFAPM being an air-cored machine, the feasibility to develop a linear, analytical model, to accurately predict the radial flux-density and hence the induced EMF in the stator windings, as well as the accurate calculation of the developed torque of the machine, needed to be investigated. The need for a thorough analytical examination of the Double-Sided Rotor RFAPM machine stemmed from the need to reduce the blind reliance on Finite Element Modelling (FEM) software to calculate the back-EMF and torque produced by these machines. Another problem experienced with the FEM software was to obtain accurate torque results. Excessive ripple torque oscillations were sometimes experienced which took a considerable amount of time to minimise with constant refinement to the meshing of the machine parts. Reduction in the mesh element size unfortunately also added to the simulation time. The requirement for an accurate analytical model of the RFAPM machine was also necessary in order to reduce the amount of time spent on successive FEM simulation to obtain the optimum pole arc width of the permanent magnet in order to minimise the harmonic content of the radial flux-density distribution in the the stator windings. In this dissertation, the use of single-layer and double-layer, non-overlapping, concentrated winding for the RFAPM machine is also investigated. It was decided to include a comparison of these two non-overlapping winding configurations with a “hypothetical” concentrated, overlapping winding configuration. This would allow us to gauge the effectiveness of using nonoverlapping winding with respect to the reduction in copper losses as well as in the reduction in copper volume. It would also allow us to investigate the extent of how much the developed torque is affected by using non-overlapping windings instead of overlapping windings.
AFRIKAANSE OPSOMMING: In hierdie proefskrif word ’n nuwe tipe elektriese masjien, ’n Radiale-vloed Lugkern Permanent Magneet Masjien met ’n dubbelkantige rotor en nie-oorvleuelende Windings voorgestel. Die konsep vir die Radiale-vloed Lugkern Permanent Magneet Masjien, of RVLPM vir kort, is afgelei vanaf die Dubbelkantige Rotor, Aksiale-vloed Lugkern (AVLPM) masjien. Een van die probleme wat met AVLPM masjiene ondervind word, is die defleksie van die rotorjukke as gevolg van die sterk aantrekkingskragte van die permanente magnete, veral in dubbelkantige rotor masjiene. Die hoof voordeel wat die RVLPM masjien inhou bo die AVLPM masjien, is die feit dat die RVLPM se rotorjukke silindries is in plaas van ronde skywe. As gevolg van die strukturele integriteit van ’n silinders, speel die aantrekkingskrag van die permanente magnete nie meer ’n rol nie. Die fokus van die proefskrif gaan oor die deeglike analitiese analise van die dubbelkantige RVLPM masjien. Weens die feit dat die RVLPM masjien ’n lugkern masjien is, is daar besluit om ondersoek in te stel na die moontlikheid om ’n lineêre, analitiese model vir die masjien op te stel waarmee die radiale-vloeddigtheid, teen-EMK asook die ontwikkelde draaimoment vir die masjien akkuraat bereken kan word. Die behoefde aan ’n akkurate analitiese model vir die dubbelkantige rotor RVLPM masjien is om die blinde vertroue te elimineer wat daar in Eindige-Element Modellering (EEM) sagteware gestel word om die teen-EMK en ontwikkelde draaimoment van die RVLPM masjien uit te werk. ’n Verdere probleem wat daar met EEM sagteware ondervind is, is die akkurate berekening van die ontwikkelde draaimoment. Oormatige rimpel draaimoment ossillasies is soms ondervind wat heelwat tyd geverg het om te minimeer, deur voortdurende verfyning van die EEM maas in die verskillende dele van die masjien. Soos die maas egter kleiner word, verleng dit die simulasie tyd van die EEM aansienlik. Nog ’n rede vir ’n akkurate analitiese model van die RVLPM masjien, is om vinnige metode te verkry om die optimale permanente magneet pool hoekwydte te verkry, wat die minste Totale Harmoniese Vervorming (THV) in die radiale-vloeddigtheidsdistribusie in die statorgebied sal veroorsaak, sonder om herhaaldelike EEM simulasies te loop. In die proefskrif word die gebruik van enkellaag en dubbellaag, nie- oorvleuelende, gekonsentreerde wikkelings vir die RVLPM masjien ook ondersoek. Daar is besluit om hierdie twee nie-oorvleuelende windingskonfigurasies met ’n “hipotetiese” gekonsentreerde, oorvleuelende windingskonfigurasie te vergelyk. Dit behoort ons in staat te stel om die doeltreffendheid van nie-oorvleuelende windings te bepaal, met betrekking tot die afname in koperverliese asook die afname in kopervolume. Verder sal dit ons in staat stel om ook mate waartoe die ontwikkelde draaimoment deur nie-oorvleuelende windings beïnvloed word, te ondersoek.

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Šatava, Patrik. „Výpočet synchronního motoru s permanentními magnety o výkonu 50kW“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-443091.

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This master’s thesis deals with a permanent magnet synchronous machine calculation. In the first part of the thesis, the synchronous machine in general is described. Knowledge of these machines is essential for the remaining parts of the thesis. In the next part, an analytical calculation process of a given permanent magnet synchronous machine is presented. The given machine had already been manufactured before the thesis assignment. The calculation is to be adapted to the given machine. This way the parameters of the calculated machine should match the reference machine. The accuracy of the calculation can then be evaluated. Furthermore, calculations of the machine using Ansys RMxprt and Ansys Maxwell 2D are presented. The calculations are then compared with data obtained by measurements performed on the given machine. In the last part of the thesis, a modification in the analytical calculation is made to reduce the inaccuracy of the calculation. The thesis is concluded by evaluating the results.

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Ati, Modafar K. „Calculation of electromagnetic field problems in large electrical machines using the finite element method“. Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238937.

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Dorrell, David George. „Calculation of unbalanced magnetic pull in cage induction machines“. Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/244801.

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If the rotor of an induction motor is not concentric with the stator then an electromagnetic force is generated in a direction that will increase the eccentricity. This is called unbalanced magnetic pull (UMP). The first part of the work presented in this dissertation develops theoretical models which allow the calculation of the UMP in cage induction motors due to static rotor eccentricity. These account for any winding configuration including parallel stator winding connection. The second part of the work verifies the models experimentally using two different cage induction motors. The agreement between predicted and measured values of UMP and line current is found to be good. The investigation leads to several new aspects of the damping effects of parallel stator windings and the cage rotor being highlighted.

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Bílek, Vladimír. „Elektromagnetická analýza a modelování asynchronního stroje s plným rotorem“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442791.

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Tato diplomová práce se zabývá elektromagnetickou analýzou a modelováním asynchronního stroje s plným rotorem. Tato práce tedy zahrnuje literární rešerši na téma vysokootáčkových elektrických strojů s porovnáním s klasickými elektrickými stroji s převodovkou a popisem jejich výhod či nevýhod, rozdělení vysokootáčkových elektrických strojů s plnými rotory a srovnání jejich výhod či nevýhod, kde se tato práce nejvíce soustřeďuje na vysokootáčkové asynchronní stroje s plnými rotory a jejich použití v průmyslu. Dále se tato práce zabývá metodami výpočtu elektrických asynchronních strojů s plnými rotory. Proto jsou zde uvedeny a popsány metody výpočtu stroje mezi které patří analytické metody i metoda konečných prvků. Vzhledem k povaze elektrických strojů s plnými rotory je hlavně kladen důraz v této práci na výpočet stroje pomocí metody konečných prvků ve 2D prostoru s využitím korekčních činitelů konců plných rotorů, které jsou zde velmi detailně popsány a rozděleny. Na základě dostupné literatury je vypočítaný elektrický stroj s plným rotorem pomocí MKP analýzy. Elektromagnetický výpočet stroje je automatizován pomocí skriptu vytvořeného v Pythonu. Dalším hlavním cílem této práce je popis tzv. náhradních modelů, uvedení jejich výhod či nevýhod, použití v jiných průmyslových odvětvích a hlavně použití náhradních modelů na elektrický stroj s plným rotorem. S využitím náhradních modelů je dále optimalizovaný vybraný asynchronní stroj s plným rotorem a to pomocí programů SymSpace a Optimizer. Pro samotnou optimalizaci byly uvažovány 3 návrhy stroje, které byly na závěr mezi sebou porovnány a to hlavně z hlediska jejich elektromagnetického výkonu.

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Irenji, Neamat Taghizadeh. „Calculation of electromagnetic rotor losses in high-speed permanent magnet machines“. Thesis, University of Southampton, 1998. https://eprints.soton.ac.uk/47948/.

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High-speed permanent magnet machines are currently being developed for a number of applications including gas-turbine generator sets and machine tools. Due to the high peripheral speed of the rotor and the relatively high conductivity of the magnets used, rotor eddy current loss can be substantial. Quite low levels of loss may present a serious problem if rotor cooling is poor. The accurate calculation of these losses, and appreciation of their dependence on machine parameters, are therefore of great importance for reasons of both efficiency and temperature rise. In this, thesis, a method has been developed to evaluate the asynchronously rotating harmonics with respect to the rotor and to calculate rotor power loss caused by these harmonics. The harmonics are determined by double Fourier analysis of the normal flux density data over the rotor surface. The data is obtained from finite element magnetostatic analysis of the machine at different rotor positions, with all possible harmonic sources present, except rotor induced eddy currents whose effect on harmonics was found to be negligible. Rotor power loss is calculated for each harmonic using a 2D rectilinear current sheet model of the machine. The magnitude of the current sheet, which is placed on the inner surface of a toothless stator, is adjusted to produce the same magnetostatic normal flux density over the rotor surface as that of the corresponding harmonic. The 2D current sheet model does not allow for 3D end effects and magnet segmentation. The accuracy of the analytical rectilinear current sheet model was verified by comparison with a cylindrical FE current sheet model, and by solving a benchmark eddy current problem that can be also solved using FE steady-state AC analysis. The current sheet model was used to calculate rotor loss in a number of generic machines, with two basic types of rotor construction: 1) non-salient rotor with arc shaped surface magnets and 2) salient rotor with chord shaped surface magnets. The results show that rotor loss depends strongly on the ratio of slot opening to slot pitch (s/X.) and on the ratio of total airgap to slot pitch (g/X). For the same fundamental airgap flux density, rotor loss reduces dramatically by increasing airgap length and reducing slot opening. Increasing the number of slots also reduces the loss. The results also show that rotor loss in a generator increases as the power factor moves from lagging to leading due to the armature reaction effect. Using a conducting sleeve, instead of a non-conducting one, with conductivity in the range of practical values, increases rotor losses dramatically. Reducing magnet conductivity reduces rotor loss. Rotor power loss in machines with non-conducting sleeve is concentrated on the surface of the magnet and a small part on the surface of the hub. In machines with chord shaped magnets, the power loss density can be very high in the parts of the steel hub near the intersection of two poles where local total airgap is small. The harmonics caused by inverter switching in a motor or rectifier switching in an alternator can cause a very significant increase in rotor loss, compared to a machine with a sinusoidal mmf. The results also show that the loss depends strongly on the switching strategy, e.g., switching harmonics in 6 step mmf waveform produce 3 times more loss than a 12 step mmf waveform. Although the developed method for calculation of rotor power loss does not take the effect of magnet peripheral discontinuity or segmentation into account, it is clear that segmentation reduces power loss by interrupting the eddy current return path, specially for harmonics with long wavelengths. The effect of segmentation requires further study.

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Haratek, Jiří. „Výpočet rozložení teplotního pole v elektrickém stroji“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318865.

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This diploma thesis deals with methods used to determine the temperature field distribution within an electric machine. The first part is focused on methods of temperature measurement, generation and transfer of the thermal energy within the electric machine, asynchronous motor in particular. The thesis describes classical methods of temperature measurement and it also deals with ANSYS Workbench finite element method for thermal analysis of the motor. The final part of the thesis is focused on a comparation of all discussed methods with respect to results of thermal test for real asynchronous motor and concludes the most proper method.

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Petrarca, Ivan. „Unified analysis and operating point calculation of AC drives“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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Sommario La seguente tesi si basa sulla modellizzazione di un generico motore elettrico trifase, nel corso della trattazione è stata svolta un’analisi unificata di questo problema in modo da poter includere nel modello motori asincroni e brushless anche molto diversi tra loro semplicemente cambiando i parametri iniziali. Considerato un veicolo elettrico, quando si agisce sul pedale dell’ acceleratore viene generato un riferimento di coppia per soddisfare le richieste del guidatore, in genere la coppia di riferimento viene soddisfatta per mezzo di regolatori PI, tuttavia questo modello può andare a compensare i ritardi o le oscillazioni dei regolatori e ipoteticamente migliorare il comportamento del sistema. Il modello in questione ha diversi ingressi, i principali sono il numero di giri del motore e la coppia di riferimento, a questo punto esso è in grado di fornire in modo analitico la corrente necessaria a soddisfare quella coppia e la coppia effettivamente erogata nel punto di lavoro calcolato. Per il calcolo del punto di lavoro vengono utilizzati degli algoritmi basati sul metodo di Ferrari per la risoluzione delle quartiche; infatti man mano che il numero di giri aumenta bisogna spostarsi lungo diverse curve i cui punti sono soluzioni di equazioni di quarto grado. Per ogni istante quindi il modello calcola le soluzioni di queste equazioni e in seguito sceglie il punto di lavoro ottimale rispettando i limiti di corrente e di velocità; anche se si utilizza un altro tipo di motore non cambia il metodo di risoluzione delle quartiche, cambia però il sistema di scelta del punto di lavoro ottimale perché per ogni motore variano le curve che lo caratterizzano.

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Goby, Frédéric. „Utilisation d'une methode couplee : "elements finis-elements integrales de frontiere" pour le calcul des forces dans des dispositifs electromagnetiques : application au calcul du couple d'une machine a reluctance variable“. Paris 6, 1987. http://www.theses.fr/1987PA066401.

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Le couplage de la methode des elements finis avec la methode des elements integrales de frontiere permet de resoudre plus facilement certains problemes d'electromagnetisme. On peut appliquer ce couplage au calcul des forces au sein de dispositifs electromagnetiques, en particulier pour determiner le couple d'une machine a reluctance variable

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Bücher zum Thema "Electrical machine calculation"

Smirnov, Aleksandr. Electric drive with contactless synchronous motors. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1192105.

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Contactless synchronous machines are considered, classification, description of structures, construction of analytical and numerical models for research calculations and design of inductor motors with electromagnetic excitation and with excitation from permanent magnets are given. Examples of design and research calculations of the operation of a synchronous drive of automation systems by means of a computational experiment are given.

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Huppunen, Jussi. High-speed solid-rotor induction machine: Electromagnetic calculation and design. Lappeenranta: Lappeenranta University of Technology, 2004.

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Zuev, Sergey, Ruslan Maleev und Aleksandr Chernov. Energy efficiency of electrical equipment systems of autonomous objects. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1740252.

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When considering the main trends in the development of modern autonomous objects (aircraft, combat vehicles, motor vehicles, floating vehicles, agricultural machines, etc.) in recent decades, two key areas can be identified. The first direction is associated with the improvement of traditional designs of autonomous objects (AO) with an internal combustion engine (ICE) or a gas turbine engine (GTD). The second direction is connected with the creation of new types of joint-stock companies, namely electric joint-stock companies( EAO), joint-stock companies with combined power plants (AOKEU). The energy efficiency is largely determined by the power of the generator set and the battery, which is given to the electrical network in various driving modes. Most of the existing methods for calculating power supply systems use the average values of disturbing factors (generator speed, current of electric energy consumers, voltage in the on-board network) when choosing the characteristics of the generator set and the battery. At the same time, it is obvious that when operating a motor vehicle, these parameters change depending on the driving mode. Modern methods of selecting the main parameters and characteristics of the power supply system do not provide for modeling its interaction with the power unit start-up system of a motor vehicle in operation due to the lack of a systematic approach. The choice of a generator set and a battery, as well as the concept of the synthesis of the power supply system is a problem studied in the monograph. For all those interested in electrical engineering and electronics.

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Sneakier uses for everyday things: How to turn a calculator into a metal detector, carry a survival kit in a shoestring, make a gas mask with a balloon, turn dishwashing liquid into a copy machine, convert a styrofoam cup into a speaker, and make a spy gadget jacket with everyday things. Kansas City, MO: Andrews McMeel, 2005.

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Merz, Hermann. Electric Machines and Drives. Fundamentals and Calculation Examples for Beginners. VDE-Verlag, 2002.

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Buchteile zum Thema "Electrical machine calculation"

Drubel, Oliver. „Calculation-Methods for Converter Fed Electrical Machines“. In Converter Applications and their Influence on Large Electrical Machines, 27–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36282-8_3.

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Nysveen, A., R. Nilssen und G. Sande. „A Hybrid FE-BE Method for Accurate Field and Torque Calculation in Electrical Machines“. In Electric and Magnetic Fields, 221–24. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1961-4_50.

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Pan, Zhiyi, Shunde Gao, Xin Wang und Xuyang Cao. „An Integrated Conceptual Design Calculation Method for Logistics Machinery Based on Working Condition and Load Combination“. In Lecture Notes in Electrical Engineering, 385–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44674-4_36.

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Rehfeldt, Alexander, Torben Fricke, Babette Schwarz, Amir Ebrahimi und Bernd Ponick. „Semi-analytical Calculation of Field and Loss Distribution in the Tooth Tips of Electrical Machines“. In Springer Proceedings in Energy, 395–403. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69799-0_27.

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Daisy, Anjali. „Knowledge Graph Generation“. In Advances in Computer and Electrical Engineering, 115–21. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1159-6.ch007.

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Nowadays, as computer systems are expected to be intelligent, techniques that help modern applications to understand human languages are in much demand. Amongst all the techniques, the latent semantic models are the most important. They exploit the latent semantics of lexicons and concepts of human languages and transform them into tractable and machine-understandable numerical representations. Without that, languages are nothing but combinations of meaningless symbols for the machine. To provide such learning representation, embedding models for knowledge graphs have attracted much attention in recent years since they intuitively transform important concepts and entities in human languages into vector representations, and realize relational inferences among them via simple vector calculation. Such novel techniques have effectively resolved a few tasks like knowledge graph completion and link prediction, and show the great potential to be incorporated into more natural language processing (NLP) applications.

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Dasgupta, Subrata. „A Tangled Web of Inventions“. In It Began with Babbage. Oxford University Press, 2014. http://dx.doi.org/10.1093/oso/9780199309412.003.0011.

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On February 15, 1946, a giant of a machine called the ENIAC, an acronym for Electronic Numerical Integrator And Computer, was commissioned at a ceremony at the Moore School of Electrical Engineering at the University of Pennsylvania, Philadelphia. The name is noteworthy. We see that the word computer—to mean the machine and not the person—had cautiously entered the emerging vocabulary of computer culture. Bell Laboratories named one of its machines Complex Computer; another, Ballistic Computer (see Chapter 5, Section I ). Still, the embryonic world of computing was hesitant; the terms “calculator”, “calculating machine”, “computing machine”, and “computing engine” still prevailed. The ENIAC’s full name (which, of course, would never be used after the acronym was established) seemed, at last, to flaunt the fact that this machine had a definite identity, that it was a computer. The tale of the ENIAC is a fascinating tale in its own right, but it is also a very important tale. Computer scientists and engineers of later times may be ignorant about the Bell Laboratories machines, they may be hazy about the Harvard Mark series, they may have only an inkling about Babbage’s dream machines, but they will more than likely have heard about the ENIAC. Why was this so? What was it about the ENIAC that admits its story into the larger story? It was not the first electronic computer; the Colossus preceded the ENIAC by 2 years. True, no one outside the Bletchley Park community knew about the Colossus, but from a historical perspective, for historians writing about the state of computing in the 1940s, the Colossus clearly took precedence over the ENIAC. In fact (as we will soon see), there was another electronic computer built in America that preceded the ENIAC. Nor was the ENIAC the first programmable computer. Zuse’s Z3 and Aiken’s Harvard Mark I, as well as the Colossus, well preceded the ENIAC in this realm. As for that other Holy Grail, general purposeness, this was, as we have noted, an elusive target (see Chapter 6, Section III).

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Gaurav, Kumar Abhishek, und Ladly Patel. „Machine Learning With R“. In Applications of Artificial Intelligence in Electrical Engineering, 291–331. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2718-4.ch015.

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In this chapter, the author explained the importance of the R language in machine learning and steps to the installation of R in a different environment like Windows and Linux. The author also describes the basic concepts of R like its syntax, data types, variables, function, operator, etc. with examples in detail. In advanced R, the author explained different charts to plot different data using a barplot function. Using barplot, different graphs like histograms, pie charts can be drawn. The author has also shown how to label the axis of the graph and how to plot a different color. The chapter also consists of some basic R programming examples like a program to make a calculator, checking Armstrong's number, etc. The author also describes the steps and process to install tensor flow.

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G. Mohammed, Khalid. „Mechanical and Electrical Design Calculations of Hybrid Vehicles“. In Applied Electromechanical Devices and Machines for Electric Mobility Solutions. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91059.

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Nedelcu, Otilia, und Corneliu Ioan. „Calculation Methods for Heating and Ventilation System of Electrical Machines“. In Heat Transfer Phenomena and Applications. InTech, 2012. http://dx.doi.org/10.5772/51962.

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„Armature Reaction“. In Advances in Computer and Electrical Engineering, 57–83. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8441-6.ch003.

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In Direct Current machines, we have two types of windings. The first one is field winding and the second one is armature winding. Armature field, and armature reaction is about armature winding. In this chapter, we discuss the issue of armature field, Geometrical and magnetic neutral axis (G.NA & M.N.A), resultant field at load. Then we discuss shift of neutral plane in generator vs motor. After that we discuss the calculation of cross-magnetising ampere – turns per pole, compensating windings. Finally, this chapter ends with commutating or inter poles.

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Konferenzberichte zum Thema "Electrical machine calculation"

Froidurot, B. „Calculation of electrical machine magnetic stray fields“. In Proceedings of CEM 2002 - 4th International Conference on Computation in Electromagnetics. IEE, 2002. http://dx.doi.org/10.1049/ic:20020188.

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Franc, J., und R. Pechanek. „Ventilation - Thermal Calculation of 40 MW Synchronous Machine“. In 2018 XIII International Conference on Electrical Machines (ICEM). IEEE, 2018. http://dx.doi.org/10.1109/icelmach.2018.8506874.

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Rabenstein, L., A. Dietz, A. Kremser und N. Parspour. „Semi-Analytical Calculation of a Laminated Transverse Flux Machine“. In 2020 International Conference on Electrical Machines (ICEM). IEEE, 2020. http://dx.doi.org/10.1109/icem49940.2020.9271065.

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Gerling, D., G. Dajaku, F. Bachheibl und A. Patzak. „Analytical calculation of the novel Stator Cage Machine“. In 2015 18th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2015. http://dx.doi.org/10.1109/icems.2015.7385248.

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Yu, Shenbo, Shi Jiao, Jing Yuan und Yonghui Zhao. „Calculation of Rotor Critical Speeds from Permanent Magnet Synchronous Machine“. In 2010 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2010. http://dx.doi.org/10.1109/icece.2010.838.

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Sheng, Gong, Yang Xiangyu und Ji Liangzhou. „Inductance Calculation for Stator Winding of Brushless Doubly-Fed Machine“. In 2010 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2010. http://dx.doi.org/10.1109/icece.2010.936.

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Kremers, M. F. J., J. J. H. Paulides, J. L. G. Janssen und E. A. Lomonova. „Analytical flux linkage and EMF calculation of a Transverse Flux Machine“. In 2014 XXI International Conference on Electrical Machines (ICEM). IEEE, 2014. http://dx.doi.org/10.1109/icelmach.2014.6960565.

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Xinzhen Wu und Xiangheng Wang. „Parameter calculation for induction machine rotor bar with non-sinusoidal current“. In Proceedings of the Eighth International Conference on Electrical Machines and Systems. IEEE, 2005. http://dx.doi.org/10.1109/icems.2005.202484.

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Ertan, H. Bulent, und L. Burak Yalciner. „Performance calculation of SR motors for optimum design and a washing machine application“. In 2008 International Conference on Electrical Machines (ICEM'08). IEEE, 2008. http://dx.doi.org/10.1109/icelmach.2008.4800203.

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Fang, Jie, Carsten Heising, Volker Staudt und Andreas Steimel. „Modelling of anisotropic synchronous machine in stator-reference frame including torque calculation“. In 2010 Electrical Systems for Aircraft, Railway and Ship Propulsion (ESARS). IEEE, 2010. http://dx.doi.org/10.1109/esars.2010.5665225.

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