Relevant bibliographies by topics / Electrical Machine

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Electrical Machine'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 June 2024

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Journal articles on the topic "Electrical Machine"

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Müller, Samuel, David Maier, and Nejila Parspour. "Inductive Electrically Excited Synchronous Machine for Electrical Vehicles—Design, Optimization and Measurement." Energies 16, no. 4 (February 7, 2023): 1657. http://dx.doi.org/10.3390/en16041657.

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The demand for electric machines has been rising steadily for several years—mainly due to the move away from the combustion engine. Synchronous motors with rare earth permanent magnets are widely used due to their high power densities. These magnets are cost-intensive, cost-sensitive and often environmentally harmful. In addition to dispensing with permanent magnets, electrically excited synchronous machines offer the advantage of an adjustable excitation and, thus, a higher efficiency in the partial load range in field weakening operation. Field weakening operation is relevant for the application of vehicle traction drive. The challenge of this machine type is the need for an electrical power transfer system, usually achieved with slip rings. Slip rings wear out, generate dust and are limited in power density and maximum speed due to vibrations. This article addresses an electrically excited synchronous machine with a wireless power transfer onto the rotor. From the outset, the machine is designed with a wireless power transfer system for use in a medium-sized electric vehicle. As an example, the requirements are derived from the BMW’s i3. The wireless power transfer system is integrated into the hollow shaft of the rotor. Unused space is thus utilized. The overall system is optimized for high efficiency, especially for partial load at medium speed, with an operation point-depending optimization method. The results are compared with the reference permanent magnet excited machine. A prototype of the machine is built and measured on the test bench. The measured efficiency of the inductive electrically excited synchronous machine is up to 4% higher than that of the reference machine of the BMW i3.
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Podgornovs, Andrejs, and Anton Sipovics. "Electromechanical Battery, Electrical Machines Mass Functions Analysis." Scientific Journal of Riga Technical University. Power and Electrical Engineering 28, no. 1 (January 1, 2011): 53–57. http://dx.doi.org/10.2478/v10144-011-0009-7.

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Electromechanical Battery, Electrical Machines Mass Functions AnalysisIn this paper different types of electrical machines in electromechanical battery, were described. The most known manufactured battery data is composed. Three types of machines: synchronous machine with salient poles and electromagnetic excitation, with permanent magnets on rotor and reluctance synchronous machine were analyzed. For all types of machines, mass is function of general geometrical size of magnetic system and machines electrical power.
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Jong, H. C. J. De. "Scale Aspects of Electrical Machine Inductances." International Journal of Electrical Engineering & Education 32, no. 2 (April 1995): 179–84. http://dx.doi.org/10.1177/002072099503200208.

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Scale aspects of electrical machine inductances Winding inductances have a natural trend to grow with increasing size. This may cause problems to electrical machines if, within a wide size range, the required per-unit values of certain reactances are more or less fixed. After having touched the transformer situation, two electrical machine solutions will be discussed: partial compartmentization of winding; interdependence of frequency and pole number.
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Bobba, Phaneendra Babu, G. Sandhya Rani, and Burra Sujan Goud. "A Comparative Study on Conventional and Superconducting Electrical Machines." E3S Web of Conferences 391 (2023): 01211. http://dx.doi.org/10.1051/e3sconf/202339101211.

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This paper investigates the potential benefits of utilizing superconducting materials in machines. The project focuses on replacing the conventional copper windings with superconducting materials in a machine. The machine is modelled and simulated using ANSYS software, both with conventional copper windings and with superconducting windings. A 3.7kw and 11kw 3 phase Induction machines are simulated with YBCO material applied to stator and rotor windings. The results show that the use of superconducting materials in the machine windings can significantly reduce energy losses and improve machine efficiency by 1 to 10%. Overall, the study suggests that superconducting machines offer a promising avenue for improving energy efficiency and reducing operating costs.
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Boglietti, Aldo, Ayman M. El-Refaie, Oliver Drubel, Avoki M. Omekanda, Nicola Bianchi, Emmanuel B. Agamloh, Mircea Popescu, Antonino Di Gerlando, and James Borg Bartolo. "Electrical Machine Topologies: Hottest Topics in the Electrical Machine Research Community." IEEE Industrial Electronics Magazine 8, no. 2 (June 2014): 18–30. http://dx.doi.org/10.1109/mie.2013.2294077.

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Shah, S. B., B. Silwal, and A. Lehikoinen. "Effciency of an Electrical Machine in Electric Vehicle Application." Journal of the Institute of Engineering 11, no. 1 (March 29, 2016): 20–29. http://dx.doi.org/10.3126/jie.v11i1.14692.

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Machines have always made life simpler, directly or indirectly. They have been developed for a very wide range of applications. For the per- formance analysis of any machine, one important parameter to be considered is the machine loss. This consideration has signifcances like determining the effciency of the machine which in turn infuences the operating cost, determining the heating of machine and for accounting the voltage drops or current component associated with the cause of the losses and many more. Losses in electrical machines can be categorized according to the causes or phenomena that produce them. The effciency of an electrical machine directly depends on different kind of losses in the machine. Therefore, in this paper we primarily focus on the losses in the machine. First, all possible losses, their causes and effects in an electrical machine have been explained. A brief account of calculating those losses has also been explained. The standard method of calculating the effciency follows after that. Finally, a fnite element analysis is performed for a test machine and the losses and the effciency of the test machine is stud- ied. Journal of the Institute of Engineering, 2015, 11(1): 20-29
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Moreno, Yerai, Gaizka Almandoz, Aritz Egea, Patxi Madina, and Ana Julia Escalada. "Multi-Physics Tool for Electrical Machine Sizing." Energies 13, no. 7 (April 2, 2020): 1651. http://dx.doi.org/10.3390/en13071651.

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Society is turning to electrification to reduce air pollution, increasing electric machine demand. For industrial mass production, a detailed design of one machine is usually done first, then a design of similar machines, but different ratings are reached by geometry scaling. This design process may be highly time-consuming, so, in this paper, a new sizing method is proposed to reduce this time, maintaining accuracy. It is based on magnetic flux and thermal maps, both linked with an algorithm so that the sizing process of an electrical machine can be carried out in less than one minute. The magnetic flux maps are obtained by Finite Element Analysis (FEA) and the thermal maps are obtained by analytical models based on Lumped Parameter Circuits (LPC), applying a time-efficient procedure. The proposed methodology is validated in a real case study, sizing 10 different industrial machines. Then, the accuracy of the sizing tool is validated performing the experimental test over the 10 machines. A very good agreement is achieved between the experimental results and the performances calculated by the sizing tools, as the maximum error is around 5%.
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Selema, Ahmed, Mohamed N. Ibrahim, and Peter Sergeant. "Electrical Machines Winding Technology: Latest Advancements for Transportation Electrification." Machines 10, no. 7 (July 12, 2022): 563. http://dx.doi.org/10.3390/machines10070563.

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The ever-increasing demand for higher-power dense electrical machines has resulted in different electrical, mechanical, and thermal stresses, which can eventually cause machine failure. For this reason, the management of stresses and losses must be thoughtfully investigated to have a highly reliable electrical machine. The literature agrees that winding losses are the dominant loss mechanism in many electrical machines. However, statements vary on how to mitigate these losses along with the aforementioned stresses. To avoid winding failure, a study of the various winding topologies would allow for a better consideration of the challenges and limitations in the performance of different electrical machines. To this aim, this paper introduces a comprehensive review for different winding topologies. Many reported cases in the literature are summarized and compared. Moreover, the utilization of additive manufacturing (AM) in the production of the machine windings is presented, showing a high level of maturity of this emerging technology. Finally, different challenges facing the design of machine windings are introduced including the AC high frequency losses, thermal management, mechanical and acoustic problems, insulation aging, automated production, and winding manufacturability.
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Greenslade, Thomas B. "The hydro‐electrical machine." Physics Teacher 32, no. 4 (April 1994): 210–11. http://dx.doi.org/10.1119/1.2343971.

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Liu, Xiping, Dong Chen, Liang Yi, Chao Zhang, and Min Wang. "Comparison and Analysis of Magnetic-Geared Permanent Magnet Electrical Machine at No-Load." Archives of Electrical Engineering 63, no. 4 (December 11, 2014): 683–92. http://dx.doi.org/10.2478/aee-2014-0047.

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Abstract Magnetic-geared permanent magnet (MGPM) electrical machine is a new type of machine by incorporating magnetic gear into PM electrical machine, and it may be in operation with low-speed, high-torque and direct-driven. In this paper, three types of MGPM machines are present, and a quantitative comparison among them is performed by finite element analysis (FEA). The magnetic field distribution, stable torque and back EMF are obtained at no-load. The results show that three types of MGPM machine are suitable for different application fields respectively according to their own advantages, such as high torque and back EMF, which form an important foundation for MGPM electrical machine research.
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Dissertations / Theses on the topic "Electrical Machine"

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Elschich, Ahmed. "Thermo-mechanical Fatigue of Electrical Insulation System in Electrical machine." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-62579.

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Electrical machines in electrified heavy-duty vehicles are subjected to dynamic temperature loadings during normal operation due to the different driving conditions. The Electrical Insulation System (EIS) in a stator winding is aged as an effect of these dynamic thermal loads. The thermal loads are usually high constant temperatures and thermal cycling. The high average constant thermal load is well-known in the electrical machine industry but little is known about the effect of temperature cycling. In this project, the ageing of the EIS in stator windings due to temperature cycling is examined. In this project, computational simulations of different simplified models that represent the electrical insulation system are made to analyse the thermo-mechanical stresses that is induced due to thermal cycling. Furthermore, a test object was designed and simulated to replicate the stress levels obtained from the simulations. The test object is to ease the physical testing of electrical insulation system. Testing a complete stator takes time and has the disadvantage of having a high mass, therefore a test object is designed and a test method is provided. The results from the finite element analysis indicate that the mechanical stresses induced will affect the lifetime of the electrical insulation system. A sensitivity study of several thermal cycling parameters was performed, the stator core length, the cycle rate and the temperature cycle amplitude. The results obtained indicate that the stator core length is too short to have a significant effect on the thermo-mechanical stresses induced. The results of the sensitivity study of the temperature cycle rate and the temperature cycle amplitude showed that these parameters increase the thermo-mechanical stresses induced. The results from the simulations of the test object is similar to the results from the simulations of the stator windings, which means that the tests object is valid for testing. The test method that is most appropriate is the power cycling test method, because it replicates the actual application of stator windings. The thermally induced stresses exposing the slot insulation exceeds the yield strength of the material, therefore plastic deformation may occur only after one thermal cycle. The other components in the stator are exposed to stresses below the yield strength. The thermally induced stresses exposing the slot insulation are high enough to low cycle fatigue the electrical insulation system, thus thermo-mechanical fatigue is an ageing factor of the electrical insulation system.
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Shi, Bowen. "High performance permanent magnet electrical machine for electrical vehicle applications." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52331/.

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For electrical vehicle system, torque density, power density, output performance, high-speed range, reliability and cost are of the most importance. This means that the designing and manufacturing of high-performance traction system must be employed, regarding electrical machine, drive and battery. In this work, the main target is to propose and investigate methods for improving the designing of the electrical machine on EVs traction system. Permanent Magnet Synchronous Machine (PMSM) with the advantage on high power density, high efficiency and excellent power factor has been widely used in EVs applications, especially the high saliency type motor called Interior Permanent Magnet Machine (IPM). The use of performance map is a valuable evaluation tool for EVs machines, in terms of torque-speed ability and efficiency presentation. A FEM based performance mapping tool is designed and presented to improve such evaluation abilities, with motor control method evolved, advanced losses evaluation and optimal running time. With the evaluation tool secured, the design of an IPM traction motor is employed with prototype and experimental test, to deliver high power density, good torque performance, low harmonic content and wide speed capability. To ensure the smooth running of EVs, novel skewing method for motor, called modular skewing, is then introduced to archive optimal torque ripple minimization on IPM, rather than optimizing the cogging torque. The technique has been developed through vector redistribution algorithm and testified by 2D FEM modelling. Basing on the new designed IPM motor, a novel motor structure, named End-winding Flux Motor (EWFM), is invented, whose structure can be embedded to most type of conventional PMSM end-winding side for the purpose of end-winding utilization, power density increases and thermal improvements. In the end, the 3D FEM and experimental tests validate the concept of EWFM.
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Mukolera, J. "Logic programming in electrical machine design." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/47359.

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Risemark, Eriksson Martin. "Environmental stress of electrical machine winding insulation." Thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326711.

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The conducting winding of an electrical machine is insulated in order to prevent any short circuits to occur within the machine. This insulation is during its lifetime exposed to several environmental stresses and therefore plays an important role in the life length of the machine. Accelerated stress tests are used to investigate what design and material is most suitable for a good endurance of a product. In this master thesis, new accelerated test methods for the insulation system in an electrical machine are developed and evaluated. The study resulted in four stress tests that simulate the thermal stress, the thermomechanical stress and the ambient stress from direct oil cooling. Three diagnosis tests and a material analysis were used in order to evaluate how these accelerated stress test methods affected the insulation. The diagnosis tests showed no clear sign of deterioration of the insulation in terms of change in electrical characteristics. However, the material analysis indicated deterioration of the insulation, such as cracks and oxidation of the material. These changes show that the test methods are capable to affect the insulation, but will need more time to cause a breakdown, since a stator of this kind is expected to have a very long life length. Therefore, in future work on this topic, these test methods should continue for a longer time and it would likely be interesting to look into other diagnosis tests.
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MINERVINI, MARCELLO. "Multi-sensor analysis and machine learning classification approach for diagnostics of electrical machines." Doctoral thesis, Università degli studi di Pavia, 2022. http://hdl.handle.net/11571/1464785.

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Eriksson, Sture. "Electrical Machine Development : a study of four different machine types from Swedish perspective /." Stockholm : Elektriska maskiner & effektelektronik, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4327.

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La, Rocca Antonino. "Thermal analysis of a high speed electrical machine." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/33156/.

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This work has analysed, designed, commissioned and validated the performance of a novel cooling system for an innovative high speed, three-phase synchronous permanent magnet machine designed for an aero-engine starter/generator with a power rating of 45 kW and maximum speed of 32,000 rpm. The cooling system designed consisted into inserting a 1 mm non-electrically conductive stator sleeve in the machine airgap, this separates the rotor region from the stationary components letting the rotor running dry at all times; the stator region can then be flooded with oil. Oil enters from one side of the machine through some radial openings impinging directly over the end-winding, it then flows through two rows of equally sized axial ducts located along the inner and outer diameter of the stator to give an even distribution of the coolant, and finally it flows over the surface of the rear end-winding and leaves the machine. The thermal modelling was carried out by the joint use of Computational Fluid Dynamics (CFD) and Lumped Parameter Thermal Network (LPTN); this allowed the investigation of heat transfer phenomena and the optimisation of the cooling design. CFD was primarily employed to investigate the fluid flow and to perform conjugate heat transfer analyses; these allowed the determination of heat transfer coefficients and the prediction of temperature distribution inside the machine. Thermal networks were developed to investigate the heat flow through machine components, to perform the design optimisation and to maximise overall machine performance. A thermal network was also developed by the author to investigate the heat transfer phenomena inside the bearing chambers. An experimental apparatus was designed and commissioned in order experimentally validate the thermal models developed. Temperatures, pressures and torque up to 20,000 rpm were recorded throughout the tests and data collected were compared to quantities predicted analytically and numerically. Maximum winding temperatures measured performing a short circuit test agree well with analytical and numerical prediction with a maximum difference of 10%; mechanical losses measured carrying out a no-load test agree well at speeds over 10,000 rpm with differences between 2 and 12%. Throughout tests, pressure drops were monitored across the machine and an agreement of 13% with prediction were achieved. Design improvements are also proposed to further enhance the cooling of stator slots and of rotor components.
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Sparv, Lisa. "Cooling simulation of a BEV electrical machine rotor." Thesis, KTH, Fordonsdynamik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302143.

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The thesis work described in this report is about simulation of the cooling of an electrical machine rotor. Limitations and simplifications were made on the CAD model of the rotor with the purpose of reducing the simulation time, for it to then be used for CFD-simulations using STAR-CCM+. This was done to see the temperature, as well as its distribution, in the model. By changing various parameters, one at the time whilst the rest were kept at their assigned standard values, the changes could be analysed and thereafter compared. The tests include smaller geometry changes, parameters of the coolant and its flow, parameters for the airgap and the materials in the laminates and the material around the magnets, as well as changes in loss values. The simulations for geometry changes involving the magnets and their surrounding material resulted in minor temperature increases. An inner rotor radius increase gave a relatively large temperature decrease (although this change would be more difficult to make in practice). Most of the mean values of the temperature changes in the regions of the model were within 10% from the standard simulation used. Increased thermal contact resistance between the Bakelite and the laminates, and increased losses had the worst impact on the cooling. Meanwhile the changes in coolant parameters (as well as the its inlet temperature and mass flow) and reduced losses had the best impact on the cooling. Generally, the temperature distributions looked similar for the different simulations. There were more differences in the distributions for the simulations with changed material properties or thermal contact resistance.
Examensarbetet som beskrivs i denna rapport handlar om simulering av kylningen av en elmaskinsrotor. Avgränsningar och vissa förenklingar gjordes på en CAD modell av rotorn för att reducera simuleringstiden. Sedan användes CFD-simuleringsprogrammet STAR-CCM+ för att simulera temperaturfördelningen i modellen. Genom att ändra olika parametrar, en åt gången medan resten hölls vid sina bestämda standardvärden, kunde förändringarna undersökas och sedan jämföras. Det som testades inkluderar bland annat mindre geometriförändringar, parametrar för kyloljan och dess flöde, parametrar för luftgapet och materialen i laminaten och runt permanentmagneterna, samt förlustförändringar. Geometriförändringarna som gjordes för magneterna och det omgivande materialet gav små temperaturökningar. En ökad inre radie på rotorn gav relativt stor temperaturminskning (men denna ändring vore svårare att genomföra på rotorn i praktiken). Majoriteten av medelvärdena av modellregionernas temperaturförändringar var inom 10% från standardsimuleringen som användes. Ökat termiskt kontaktmotstånd mellan Bakeliten och laminaten samt ökade förluster hade sämst påverkan för kylningen, medan förändring i kylvätskans egenskaperna (samt inflödestemperaturen och massflödet) samt minskade förluster hade bäst inverkan. Generellt så såg temperaturfördelningarna lika ut för de olika simuleringarna. Det var främst när materialegenskaperna eller det termiska kontaktmotståndet ändrades som fördelningen såg annorlunda ut.
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Norton, Mark B. "An object oriented approach to electrical machine design." Thesis, University of Bath, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423486.

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Hillis, William Daniel. "The connection machine." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/14719.

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Books on the topic "Electrical Machine"

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Franchi, Claiton Moro. Electrical Machine Drives. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314.

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Kuale, P. A. The electrical machine. Lagos, Nigeria: Published by the Nigerian Society of Enginneers ( Eectrical Devision), 2002.

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Pyrhöonen, Juha, Valéria Hrabovcová, and Scott R Semken. Electrical Machine Drives Control: An Introduction. Chichester, UK: John Wiley & Sons Ltd, 2016. http://dx.doi.org/10.1002/9781119260479.

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Electrical machine analysis using finite elements. Boca Raton, FL: Talor & Francis, 2005.

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Hackmann, Willem Dirk. John Wesley and his electrical machine. London: John Wesley's House and the Museum of Methodism, 2003.

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Vukosavić, Slobodan N. Electrical Machines. New York, NY: Springer New York, 2013.

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1963-, Chen Meng-Jen, ed. Three-phase electrical machine systems: Computer simulation. Taunton, Somerset, England: Research Studies Press, 1993.

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A, Nasar S., ed. The induction machine handbook. Boca Raton: CRC Press, 2002.

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Yu, Qiang, Xuesong Wang, Yuhu Cheng, and Lisi Tian. Analysis and Mathematical Models of Canned Electrical Machine Drives. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2745-2.

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Gao, Jingde. AC Machine Systems: Mathematical Model and Parameters, Analysis, and System Performance. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2009.

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Book chapters on the topic "Electrical Machine"

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Weik, Martin H. "electrical accounting machine." In Computer Science and Communications Dictionary, 484. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_5865.

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Brecher, Christian, and Manfred Weck. "Electrical Controls." In Machine Tools Production Systems 3, 349–89. Wiesbaden: Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-34622-5_10.

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Üçtuğ, M. Yildirim. "Generalized Machine Theory." In Modern Electrical Drives, 353–58. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9387-8_17.

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Franchi, Claiton Moro. "Electric Motors." In Electrical Machine Drives, 1–37. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314-1.

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Franchi, Claiton Moro. "Electric Power." In Electrical Machine Drives, 99–120. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314-3.

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Vukosavic, Slobodan N. "Mathematical Model of Synchronous Machine." In Electrical Machines, 545–69. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-0400-2_19.

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Franchi, Claiton Moro. "Variable Frequency Drive Sizing and Applications." In Electrical Machine Drives, 333–51. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314-10.

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Franchi, Claiton Moro. "Three-Phase Motors." In Electrical Machine Drives, 39–97. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314-2.

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Franchi, Claiton Moro. "Motor Starter Components." In Electrical Machine Drives, 121–72. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314-4.

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Franchi, Claiton Moro. "Starting Methods of Induction Motors." In Electrical Machine Drives, 173–207. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22314-5.

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Conference papers on the topic "Electrical Machine"

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Al-ani, M. M. J., S. P. Lee, and J. M. Allport. "Integrated Electrical Machine-Turbo Machinery." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63429.

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Global warming and climate change due to rising levels of greenhouse gases have placed significant pressure on the automobile industry to adopt more clean fuel, transportation electrification, and waste energy recovery technologies. As a result, several electrically assisted or driven turbo-machines have been proposed such as turbochargers, turbo-compressors, and electrical boosters. Therefore, the electrification of turbo-machinery has been trending for the past decade. All the systems mentioned above consist of a conventional electrical machine connected to the turbo-machinery by a shaft, making the system relatively large, heavy, costly and mechanically complex. In this paper, an integrated electrical machine-turbo machinery concept is proposed. It consists of an electrical machine mounted around a salient rotor that is shaped like an axial flow turbo-machinery wheel. The electrical machine can be used as a motor to drive or assist the operation of the turbo-machine or it can operate as a generator powered by the gas or fluid flow. Compared to the conventional electrically derived or assisted turbo-machine systems, the proposed system is expected to decrease the overall size, weight and complexity. In order to illustrate this concept, an initial multi-physics feasibility study is presented. Electromagnetic and mechanical, performance are calculated and investigated using FEA. Additionally, aerodynamic consideration has been illustrated.
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Sleiti, Ahmad K. "Transient Thermal Analysis of Electrical Machine." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11021.

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Transient thermal analysis of electric machine under realistic operation conditions and thermal losses is studied. A symmetrical portion of the stator and rotor is modeled and all thermal losses and cooling boundary conditions are applied according to operational duty cycle. It is found that there is a temperature gradient across the stator of more than 30 °C, across the rotor of more than 70 °C and across the whole machine of more than 100 °C. These temperature gradients could cause high thermal stresses and lead to severe reduction in the machine life. It is extremely important in future designs to consider reducing the temperature gradients by optimizing the design of the electric machines through advanced cooling techniques and strategies.
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Centner, Matthias. "Machine design software for induction machines." In 2008 International Conference on Electrical Machines (ICEM). IEEE, 2008. http://dx.doi.org/10.1109/icelmach.2008.4800202.

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Arestova, Anna Yu, Valentin I. Bobrik, Yuliya V. Dronova, and Vladimir M. Cheban. "Doubled Capacity Electrical Machine." In 2018 XIV International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE). IEEE, 2018. http://dx.doi.org/10.1109/apeie.2018.8546275.

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Manohar, V. Joshi, and Sumit Kumar Jha. "Predicting the Performance of Electrical Machines using Machine Learning." In 2023 8th International Conference on Information Technology Research (ICITR). IEEE, 2023. http://dx.doi.org/10.1109/icitr61062.2023.10382869.

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Hu, Xuanyang, Yuping Qian, Bijie Yang, Chaofan Dong, Yangjun Zhang, and Weilin Zhuge. "Aerodynamic Design of Cooling Guide for Electrical Machine in Electric Ducted Fan." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82347.

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Abstract Electric ducted fan has newly emerged as the most compact type of propulsion fan for flying cars, because of its flexible configuration arrangement, low noise level and high safety level operation. Typically, an electric ducted fan is composed of a hub-driven fan and a hub-mounted inner rotor electrical machine. The thermal management of the hub-mounted electrical machine is essential because it determines the machine’s continuous output power and reliability, as well as the fan thrust force. The heat transmitted from the stator winding to the cooling fin is dissipated by introducing the air flow at hub region to the cooling fin. Therefore, in order to better improve the thermal performance of the cooling fin, an aerodynamic design of cooling fin is proposed in this paper for better thermal management of stator end-windings. Firstly, for a certain desired power output of electrical machine under temperature constraints of stator winding, lumped thermal network is established to derive the requirement of heat transfer coefficients of the cooling fin. Then, from engineering feasibility, three different cooling fin designs including straight type, arc-shape type and airfoil shape type are tested by computational fluid dynamics. The evaluation of the cooling fin designs includes the flow characteristics, power requirements and thermal characteristics for stator winding cooling purposes. In comparison with the conventionally straight type cooling fin, improvements are gained from the designed arc-shape type and airfoil shape type cooling fin configurations, whereas the fan thrust force remains the same simultaneously. It is verified that the arc-shape type and airfoil shape type cooling fins are promising in enhancing the thermal management performance of the electrical machine stator winding with little power requirement.
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Vilchis-Rodriguez, Damian S., Sinisa Djurović, and Alexander C. Smith. "Sensitivity Assessment of Wound Rotor Induction Generator Bearing Fault Detection Using Machine Electrical Quantities." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94586.

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This paper investigates the sensitivity of machine electrical quantities when employed as a means of bearing fault detection in wound rotor induction generators. Bearing failure is the most common failure mode in rotating AC machinery. With the widespread use of wound rotor induction machines in modern wind power generation, achieving effective detection of bearing faults in these machines is becoming increasingly important in order to minimize wind turbine maintenance related downtime. Current signature analysis has been demonstrated to be an effective technique for achieving detection of different fault types in ac machines. However, this technique lacks sensitivity when used for detection of bearing failures and therefore sophisticated post processing techniques have recently been suggested to improve its performance. As an alternative, this paper investigates the sensitivity of a range of machine electrical quantities to bearing faults, with the aim of examining the possibility of achieving improved bearing fault detection based on identifying a clear fault spectral signature. The reported signatures can be subjected potentially to refined processing techniques to further improve fault detection.
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Saravanan, M., and G. K. Rajini. "Vibration Analysis of Electrical Machine." In 2021 Innovations in Power and Advanced Computing Technologies (i-PACT). IEEE, 2021. http://dx.doi.org/10.1109/i-pact52855.2021.9696991.

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Huang, L. R., Z. Q. Zhu, and W. Q. Chu. "Optimization of electrically excited synchronous machine for electrical vehicle applications." In 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016). Institution of Engineering and Technology, 2016. http://dx.doi.org/10.1049/cp.2016.0204.

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Al-Ani, M. M. J., G. Vakil, and C. Gerada. "Electrical Machine Rotor Shielding for Low Cost Electrical Drive." In 2018 IEEE Transportation Electrification Conference and Expo (ITEC). IEEE, 2018. http://dx.doi.org/10.1109/itec.2018.8450226.

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Reports on the topic "Electrical Machine"

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Singh, Anjali. Ultimate Guide to Automated Cell Counter: Plus Purchasing Tips. ConductScience, June 2022. http://dx.doi.org/10.55157/cs20220614.

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An automated cell counter is a machine that uses either image analysis or electrical impedance principles to count cells automatically. The electrical impedance principle involves measuring changes in electrical resistance as cells pass through an aperture, while the light-scattering principle observes how cells scatter light when exposed to it. There are four main types of automated cell counting methods: Coulter Counter, Image Analysis Method, Flow Cytometry, and Stereological Cell Counting. Each method has its benefits and limitations, offering faster and more objective cell counting compared to manual methods, but also facing challenges like cost and potential counting inaccuracies. To use an automated cell counter, samples are prepared by pipetting cell suspension onto counting slide chambers, and the machine then provides a total cell count per ml.
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Rodriguez-Mateos, F., L. Coull, K. Dahlerup-Petersen, D. Hagedorn, G. Krainz, A. Rijllart, and A. McInturff. Electrical performance of a string of magnets representing a half-cell of the LHC machine. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/102202.

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Yang, Yu, and Hen-Geul Yeh. Electrical Vehicle Charging Infrastructure Design and Operations. Mineta Transportation Institute, July 2023. http://dx.doi.org/10.31979/mti.2023.2240.

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California aims to achieve five million zero-emission vehicles (ZEVs) on the road by 2030 and 250,000 electrical vehicle (EV) charging stations by 2025. To reduce barriers in this process, the research team developed a simulation-based system for EV charging infrastructure design and operations. The increasing power demand due to the growing EV market requires advanced charging infrastructures and operating strategies. This study will deliver two modules in charging station design and operations, including a vehicle charging schedule and an infrastructure planning module for the solar-powered charging station. The objectives are to increase customers’ satisfaction, reduce the power grid burden, and maximize the profitability of charging stations using state-of-the-art global optimization techniques, machine-learning-based solar power prediction, and model predictive control (MPC). The proposed research has broad societal impacts and significant intellectual merits. First, it meets the demand for green transportation by increasing the number of EV users and reducing the transportation sector’s impacts on climate change. Second, an optimal scheduling tool enables fast charging of EVs and thus improves the mobility of passengers. Third, the designed planning tools enable an optimal design of charging stations equipped with a solar panel and battery energy storage system (BESS) to benefit nationwide transportation system development.
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Pshezhetskiy, Dmitry, Tanveer Alam, and Heba Alshaker. Unsynchronised Cardioversion as a Cause of Ventricular Tachycardia in a Patient with Atrial Fibrillation. Nature Library, November 2020. http://dx.doi.org/10.47496/nl.ccr.2020.01.02.

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Background: Synchronised cardioversion (SC) is used to terminate tachycardic arrhythmia by applying electric current to the thorax. SC is synchronised to the R wave of the cardiac cycle and ventricular tachycardia (VT) or ventricular fibrillation (VF) can occur if an electrical shock is provided in a nonsynchronised way. Case Presentation: Here we present a case of a 66-year-old man who had elective cardioversion for atrial fibrillation worsened by severe left ventricular impairment. A manual defibrillator was used for the cardioversion, which, after the first synchronised shock, reverted to defibrillator mode. An unsynchronised shock was administered and induced VT, which was reverted to sinus rhythm with a defibrillation shock. Conclusion: When using manual defibrillator for SC, the machine needs to be set to a synchronised mode. The synchronisation to the R wave needs to be checked before every shock.
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Adams, D. J., and D. W. Stahura. Parametric Electric Machine Study. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/770418.

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Modlo, Yevhenii O., Serhiy O. Semerikov, Ruslan P. Shajda, Stanislav T. Tolmachev, and Oksana M. Markova. Methods of using mobile Internet devices in the formation of the general professional component of bachelor in electromechanics competency in modeling of technical objects. [б. в.], July 2020. http://dx.doi.org/10.31812/123456789/3878.

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The article describes the components of methods of using mobile Internet devices in the formation of the general professional component of bachelor in electromechanics competency in modeling of technical objects: using various methods of representing models; solving professional problems using ICT; competence in electric machines and critical thinking. On the content of learning academic disciplines “Higher mathematics”, “Automatic control theory”, “Modeling of electromechanical systems”, “Electrical machines” features of use are disclosed for Scilab, SageCell, Google Sheets, Xcos on Cloud in the formation of the general professional component of bachelor in electromechanics competency in modeling of technical objects. It is concluded that it is advisable to use the following software for mobile Internet devices: a cloud-based spreadsheets as modeling tools (including neural networks), a visual modeling systems as a means of structural modeling of technical objects; a mobile computer mathematical system used at all stages of modeling; a mobile communication tools for organizing joint modeling activities.
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Bruce and Fiore. L51629 Users Manual-Field Validation of the Low-Frequency Eddy Current Instrument-Software Listings. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), October 1990. http://dx.doi.org/10.55274/r0010602.

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When an eddy current probe is placed near a conductive material, the alternating magnetic field from the probe causes electrical currents to flow in the material. These currents have associated with them their own magnetic field, which opposes the original magnetic field from the coil. The result is that the impedance of the probe is greatly reduced by the presence of the conducting material. If the conductor is also magnetic, as is normal steel, the situation is similar though slightly more complicated. Here, the impedance of the probe may be either increased or decreased depending on the permeability of the material and the frequency of the alternating field. Anything that affects the flow of current in the conductive material will also affect the impedance of the eddy current probe. For example, the electrical currents cannot flow through a crack but must flow around it. The alteration in the currents also changes the magnetic field produced by the currents and, consequently, the impedance of the probe. Normally, the impedance change caused by a defect is much smaller than that caused by the presence of the material in the first place, and measuring this small change requires a bridge circuit much like the balanced bridge used with strain gauges. The balanced bridge allows one to amplify the small changes in impedance caused by defects in the presence of the much larger change caused by the presence of the conductive and magnetic pipeline steel. The LFEC instrument is constructed using an� IBM-AT compatible portable computer. Inside the PAC-386 are two plug-in circuit cards that turn the PAC-386 into an eddy current instrument. The first, also commercially available, is a Spectrum DSP56000 digital signal processing card, while the second is a specially-built interface card for the eddy current probe. The PAC-386 is a standard MS-DOS machine and will operate most MS-DOS software. In the discussion below, it is assumed that the user is familiar with the MSDOS operating system.
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Binder, Alex, Conner Ozatalar, Kendyl Wright, Nicholas Lievin-Lieven, and Phillip Cornwell. Data Challenges for Structural Health Monitoring of Electrical Machines. Office of Scientific and Technical Information (OSTI), August 2021. http://dx.doi.org/10.2172/1813818.

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Moreno, Gilbert, and Sreekant Narumanchi. Advanced Power Electronics and Electric Machines. Office of Scientific and Technical Information (OSTI), February 2023. http://dx.doi.org/10.2172/1957766.

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Muljadi, Eduard, Robert Nelms, Erol Chartan, Robi Robichaud, Lindsay George, and Henry Obermeyer. Electrical Systems of Pumped Storage Hydropower Plants: Electrical Generation, Machines, Power Electronics, and Power Systems. Office of Scientific and Technical Information (OSTI), June 2021. http://dx.doi.org/10.2172/1804447.

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