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Journal articles on the topic 'Electrical machine theory'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Wardach, Marcin, Ryszard Palka, Piotr Paplicki, and Michal Bonislawski. "Novel hybrid excited machine with flux barriers in rotor structure." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 4 (2018): 1489–99. http://dx.doi.org/10.1108/compel-08-2017-0364.

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Purpose Permanent magnet (PM) electrical machines are becoming one of the most popular type of the machines used in electrical vehicle drive applications. The main drawback of permanent magnet machines, despite obvious advantages, is associated with the flux control capability, which is limited at high rotor speeds of the machine. This paper aims to present a new arrangement of permanent magnets and flux barriers in the rotor structure to improve the field weakening control of hybrid excited machines. The field weakening characteristics, back-emf waveforms and efficiency maps of this novel mac

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Li, Min, Mohammad Hossain Mohammadi, Tanvir Rahman, and David Lowther. "Analysis and design of electrical machines with material uncertainties in iron and permanent magnet." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 5 (2017): 1326–37. http://dx.doi.org/10.1108/compel-02-2017-0110.

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Purpose Manufacturing processes, such as laminations, may introduce uncertainties in the magnetic properties of materials used in electrical machines. This issue, together with magnetization errors, can cause serious deterioration in the performance of the machines. Hence, stochastic material models are required for the study of the influences of the material uncertainties. The purpose of this paper is to present a methodology to study the impact of magnetization pattern uncertainties in permanent magnet electric machines. Design/methodology/approach The impacts of material uncertainties on th

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Yamamura, Sakae. "Spiral Vector Theory of Synchronous Machine." IEEJ Transactions on Industry Applications 117, no. 10 (1997): 1197–204. http://dx.doi.org/10.1541/ieejias.117.1197.

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Szucs, Aron, Zlatko Kolondzovski, Jan Westerlund, and Juha Vahala. "Diamond enriched lamination and winding insulation for electrical machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 4 (2019): 1245–52. http://dx.doi.org/10.1108/compel-10-2018-0397.

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Purpose The thermal management of electrical insulations poses a challenge in electrical devices as electrical insulators are also thermal insulators. Diamond is the best solid electrical insulator and thermal conductor. This can lead to a paradigm change for electrical machine winding and lamination insulation design and thermal management. The paper introduces these techniques and discusses its effect for the design of electrical machines and its potential consequences for electromagnetic analysis, for example, in multi-physics modelling. The diamond winding insulation is patent-pending, but

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Cai, Haiwei, Bo Guan, Longya Xu, and Woongchul Choi. "Optimal design of synchronous reluctance machine." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 5 (2014): 1569–86. http://dx.doi.org/10.1108/compel-09-2013-0287.

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Purpose – The purpose of this paper is to present optimally designed synchronous reluctance machine (SynRM) to demonstrate the feasibility of eliminating the use of rare earth permanent magnet (PM) in electric machine for vehicle traction applications. Design/methodology/approach – A typical rare earth interior permanent magnet (IPM) machine is used as the benchmark to conduct the optimal design study. Based on the flux distribution, major changes are made to the rotor lamination design. Enhanced torque production and lower torque ripple are specifically targeted as the two main objectives of

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Moschoudis, Angelos P., George J. Tsekouras, Fotios D. Kanellos, and Antonios G. Kladas. "Particular SRM Design Methodology Based on Similarity Theory, Scale Factors and FEM." Materials Science Forum 856 (May 2016): 269–75. http://dx.doi.org/10.4028/www.scientific.net/msf.856.269.

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This paper presents the design of geometrically similar switched reluctance machines based on similarity theory and scale factors techniques. The fundamental theory for the development of the proposed methodology is described. The proposed methodology is used for the design of a particular 21.6 W three phase 6/4 pole switched reluctance motor, which can be used as a special electrical machine (pump’s driving motor) in an artificial heart. In addition, a sensitivity analysis using FEM was performed in order to confirm the accuracy of the proposed method.

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Le Guyadec, Mathias, Laurent Gerbaud, Emmanuel Vinot, and Benoit Delinchant. "Sensitivity analysis using Sobol indices for the thermal modelling of an electrical machine for sizing by optimization." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 3 (2019): 965–76. http://dx.doi.org/10.1108/compel-09-2018-0360.

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Purpose The thermal modelling of an electrical machine is difficult because the thermal behavior depends on its geometry, the used materials and its manufacturing process. In the paper, such a thermal model is used during the sizing process by optimization of a hybrid electric vehicle (HEV). This paper aims to deal with the sensitivities of thermal parameters on temperatures inside the electrical machine to allow the assessment of the influence of thermal parameters that are hard to assess. Design/methodology/approach A sensitivity analysis by Sobol indices is used to assess the sensitivities

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8

Karthaus, Jan, Benedikt Groschup, Robin Krüger, and Kay Hameyer. "Mechanical stress distribution and the utilisation of the magneto-elastic effect in electrical machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 4 (2019): 1085–97. http://dx.doi.org/10.1108/compel-10-2018-0387.

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Purpose Due to the increasing amount of high power density high-speed electrical machines, a detailed understanding of the consequences for the machine’s operational behaviour and efficiency is necessary. Magnetic materials are prone to mechanical stress. Therefore, this paper aims to study the relation between the local mechanical stress distribution and magnetic properties such as magnetic flux density and iron losses. Design/methodology/approach In this paper, different approaches for equivalent mechanical stress criteria are analysed with focus on their applicability in electrical machines

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Alvarenga, Bernardo P., Renato S. Alves, Geyverson T. Paula, et al. "Anisotropic layer model theory applied to synchronous machine analysis." IET Electric Power Applications 14, no. 14 (2020): 2873–80. http://dx.doi.org/10.1049/iet-epa.2019.0887.

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10

Walton, A. "An Integrated Experiment in Field Theory." International Journal of Electrical Engineering & Education 26, no. 3 (1989): 243–56. http://dx.doi.org/10.1177/002072098902600306.

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The various means available for the solution of field problems are reviewed and the solutions for a simple problem, that of the fringing field between the pole and armature of an electric machine, obtained using three methods; direct field plotting, Schwartz-Christoffel transformation and finite elements are presented.

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11

Babaa, Fatima, and Ouafae Bennis. "An accurate inter-turn short circuit faults model dedicated to induction motors." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 1 (2021): 9. http://dx.doi.org/10.11591/ijece.v11i1.pp9-16.

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Safety, disponibility and continuity of industrial systems are major issue in maintenance. In the last decades, these points are the important axes in the field of research. In fact, in many industrial processes research has picked up a fervent place and a particular importance in the area of fault diagnosis of electrical machines, in fact, a fault prognosis has become almost indispensable. The need of a mathematical model of three-phase induction machine, suitable for the simulation of machines behaviour under fault conditions, has received considerable attention. The paper presents a new pra

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Bielby, Steven, and David A. Lowther. "Neural network approach to sizing an electrical machine." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 32, no. 5 (2013): 1500–1511. http://dx.doi.org/10.1108/compel-04-2013-0127.

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13

KIM, K. K., and K. I. KIM. "THEORY OF A SYNCHRONOUS MACHINE WITH A SELF-LEVITATED ROTOR." Electric Machines & Power Systems 18, no. 4-5 (1990): 383–92. http://dx.doi.org/10.1080/07313569008909486.

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14

MATVEEV, Alexey V. "Application of the Compositional Contradictions Method of TRIZ to Search for New Solutions in the Field of Electrical Machines." Elektrichestvo 4, no. 4 (2021): 34–49. http://dx.doi.org/10.24160/0013-5380-2021-4-34-49.

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The aim of this work is to increase the quantity and quality of innovations in the field of electrical machines by increasing the quantity and quality of ideas in this field. The application of the theory of inventive problem solving (TRIZ) in electromechanics is demonstrated as one of the ways to achieve the goal. The TRIZ is an empirical, constructive, qualitative, and universal methodology for generating effective ideas and solving problems based on models of contradictions and methods for resolving them, which are extracted from known examples of effective solutions. The application of one

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15

Belahcen, Anouar, Floran Martin, Mohammed El-Hadi Zaim, Emad Dlala, and Zlatko Kolondzovski. "Combined FE and Particle Swarm algorithm for optimization of high speed PM synchronous machine." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, no. 2 (2015): 475–84. http://dx.doi.org/10.1108/compel-07-2014-0168.

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Purpose – The purpose of this paper is to optimize the stator slot geometry of a high-speed electrical machine, which is used as an assist for a turbocharger. Meanwhile, the suitability of the Particle Swarm algorithm for such a problem is to be tested. Design/methodology/approach – The starting point of the optimization is an existing design, for which the Particle Swarm algorithm is applied in conjunction with the transient time-stepping 2D finite element method. Findings – It is found that regardless of its stochastic nature, the Particle Swarm work well for the optimization of electrical m

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Karthaus, Jan, Simon Steentjes, Nora Leuning, and Kay Hameyer. "Effect of mechanical stress on different iron loss components up to high frequencies and magnetic flux densities." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 3 (2017): 580–92. http://dx.doi.org/10.1108/compel-09-2016-0416.

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Purpose The purpose of this paper is to study the variation of the specific iron loss components of electrical steel sheets when applying a tensile mechanical load below the yield strength of the material. The results provide an insight into the iron loss behaviour of the laminated core of electrical machines which are exposed to mechanical stresses of diverse origins. Design/methodology/approach The specific iron losses of electrical steel sheets are measured using a standardised single-sheet tester equipped with a hydraulic pressure cylinder which enables application of a force to the specim

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17

Williamson, S., A. C. Ferreira, and A. K. Wallace. "Generalised theory of the brushless doubly-fed machine. Part 1: Analysis." IEE Proceedings - Electric Power Applications 144, no. 2 (1997): 111. http://dx.doi.org/10.1049/ip-epa:19971051.

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18

Makhmudov, Tokhir. "The Invariance Determination of the Complex Electrical System Output of." E3S Web of Conferences 264 (2021): 01024. http://dx.doi.org/10.1051/e3sconf/202126401024.

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This article discusses the issues of applying the technology of embedding systems to study the invariance of the output of complex controlled electrical systems under small disturbances as stationary deterministic multidimensional dynamic systems. The technique of controller synthesis based on the modern matrix theory is presented. The synthesis of the regulator of the model of a multi-machine electrical system is obtained, which makes it possible to analyze the influence of the parameters of the electrical system mode.

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19

Naderi, Peyman. "Inter-turn short-circuit fault detection in saturable squirrel-cage induction motor using magnetic equivalent circuit model." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 1 (2016): 245–69. http://dx.doi.org/10.1108/compel-08-2015-0297.

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Purpose – The purpose of this paper is to obtain an integrated method for inter-turn short circuit fault detection for the cage-rotor induction machine (CRIM) considering saturation effect. Design/methodology/approach – The magnetic equivalent circuit (MEC) is proposed for machine modeling and nonlinear B-H curve is considered for saturation effect. The machine has some differential equations which are converted to algebraic type by trapezoidal method. On the other hand, some nonlinear equations are present due to saturation effect. A set of nonlinear algebraic equation should be solved by num

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Bhat, Prithvi, Zeger Bontinck, Jacopo Corno, Sebastian Schöps, and Herbert DeGersem. "Modelling of a permanent magnet synchronous machine using isogeometric analysis." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 5 (2018): 1805–14. http://dx.doi.org/10.1108/compel-01-2018-0014.

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Purpose This paper aims to propose the use of isogeometric analysis (IGA) for the simulation of electrical machines to represent their geometries exactly and obtain numerical solutions of high accuracy and regularity. Design/methodology/approach IGA makes use of non-uniform rational b-splines to parametrise the domain and approximate the solution spaces. Dealing with the different stator and rotor topologies, the computational domain is split into two non-overlapping parts on which Maxwell’s equations are solved independently and are interconnected by a classical Schwarz domain decomposition s

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21

Wen, Honghui, and Ming Cheng. "Unified Analysis of Induction Machine and Synchronous Machine Based on the General Airgap Field Modulation Theory." IEEE Transactions on Industrial Electronics 66, no. 12 (2019): 9205–16. http://dx.doi.org/10.1109/tie.2018.2885725.

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22

Garganeev, A. G., and D. A. Padalko. "On Self-Excitation of the Electrical Machine from the Perspective of the Automatic Control Theory." Proceedings of Tomsk State University of Control Systems and Radioelectronics 19, no. 2 (2016): 94–98. http://dx.doi.org/10.21293/1818-0442-2016-19-2-94-98.

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23

Ding, Song Lin, John P. T. Mo, Milan Brandt, and Richard Webb. "Electric Discharge Grinding of Polycrystalline Diamond Materials." Applied Mechanics and Materials 271-272 (December 2012): 333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.333.

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The poor electric conductivity of polycrystalline diamond (PCD) makes it difficult to machine with the conventional EDM process. Inappropriate selection of parameters of the power generator and the servo system leads to unstable working condition and low material removal rate. This paper introduces a method to find optimal parameters in the Electrical Discharge Grinding (EDG) of PCD materials with Taguchi method. The theory and detailed procedures are presented, experimental results are analyzed. The optimized configuration was validated through confirmation tests.

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Afinowi, I. A. A., Z. Q. Zhu, Y. Guan, Jean-Claude Mipo, and P. Farah. "Switched-flux machines with hybrid NdFeB and ferrite magnets." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 456–72. http://dx.doi.org/10.1108/compel-03-2015-0112.

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Purpose – The purpose of this paper is to comparatively study the conventional, i.e. single magnet, and novel hybrid-magnet switched-flux permanent-magnet (HMSFPM) machines. Design/methodology/approach – The HMSFPM machines utilize two magnet types, i.e. low-cost ferrites and NdFeB. Thus, a set of magnet ratios (?), defined as the quotient of the NdFeB volume to the total PM volume, is introduced. This allows any desired performance and cost trade-off to be designed. Series- and parallel-excited magnet configurations are investigated using 2-dimensional finite element analysis. Findings – The

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Perahia, J., and C. V. Nayar. "Generalized Machine Theory Applied to a Three Phase Twin Stator Squirrel-Cage Induction Motor." International Journal of Electrical Engineering & Education 31, no. 2 (1994): 167–83. http://dx.doi.org/10.1177/002072099403100210.

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Generalized machine theory applied to a three phase twin stator squirrel-cage induction motor This paper uses generalized machine theory to develop an equivalent circuit model of a three phase induction motor comprised of two independently housed stator windings with one stator housing moveable, and a single squirrel-cage rotor whose bars extend the full length of the two stators.

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Guan, Y., Z. Q. Zhu, I. A. A. Afinowi, J. C. Mipo, and P. Farah. "Comparison between induction machine and interior permanent magnet machine for electric vehicle application." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 572–85. http://dx.doi.org/10.1108/compel-02-2015-0110.

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Purpose – The purpose of this paper is to make a quantitative comparison between induction machine (IM) and interior permanent magnet machine (IPM) for electric vehicle applications, in terms of electromagnetic performance and material cost. Design/methodology/approach – The analysis of IM is based on an analytical method, which has been validated by test. The analysis of IPM is based on finite element analysis. The popular Toyota Prius 2010 IPM is adopted directly, and the IM is designed with the same stator outer diameter and stack length as Prius 2010 IPM for a fair comparison. Findings – T

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Borchardt, Norman, and Roland Kasper. "Parametric model of electric machines based on exponential Fourier approximations of magnetic air gap flux density and inductance." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 1 (2018): 520–35. http://dx.doi.org/10.1108/compel-06-2017-0251.

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Purpose This study aims to present a parametric model of a novel electrical machine, based on a slotless air gap winding, allowing for fast and precise magnetic circuit calculations. Design/methodology/approach Approximations of Fourier coefficients through an exponential function deliver the required nonlinear air gap flux density and inductance. Accordingly, major machine characteristics, such as back-EMF and torque, can be calculated analytically with high speed and precision. A physical model of the electrical machine with air gap windings is given. It is based on a finite element analysis

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Demenko, Andrzej. "Description of electrical machine windings in the finite element space." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 27, no. 4 (2008): 711–19. http://dx.doi.org/10.1108/03321640810878108.

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de Oliveira, A. M., R. Antunes, P. Kuo‐Peng, N. Sadowski, and P. Dular. "Electrical machine analysis considering field – circuit – movement and skewing effects." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 23, no. 4 (2004): 1080–91. http://dx.doi.org/10.1108/03321640410553517.

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30

Serrano-Iribarnegaray, L. "The modern space-phasor theory, Part II: Comparison with the generalized machine theory and the space-vector theory." European Transactions on Electrical Power 3, no. 3 (2007): 213–19. http://dx.doi.org/10.1002/etep.4450030304.

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31

Poutala, Arto, Saku Suuriniemi, Timo Tarhasaari, and Lauri Kettunen. "Towards design of electrical machines from given air gap field." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 1 (2017): 332–49. http://dx.doi.org/10.1108/compel-05-2016-0179.

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Purpose The purpose of this paper is to introduce a reverted way to design electrical machines. The authors present a work flow that systematically yields electrical machine geometries from given air gap fields. Design/methodology/approach The solution process exploits the inverse Cauchy problem. The desired air gap field is inserted to this as the Cauchy data, and the solution process is stabilized with the aid of linear algebra. Findings The results are verified by solving backwards the air gap fields in the standard way. They match well with the air gap fields inserted as an input to the sy

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Benheniche, Abdelhak, and Farid Berrezzek. "Integral Backstepping Control of Induction Machine." European Journal of Electrical Engineering 23, no. 4 (2021): 345–51. http://dx.doi.org/10.18280/ejee.230408.

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The goal of this work is to propose a latest design of a rotor speed and rotor flux modulus control approach for an induction machine using a Backstepping corrector with an integral action. The advantage of the Backstepping Strategy is the ability to manage a nonlinear system. The Lyapunov theory has been used to ensure the system stability. To improve the controller robustness proprieties the integral action is used, despite the system uncertainties and the existence of external disturbances. The unavailable rotor flux is recovered by estimation of the rotor flux of the machine based on the i

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Krishnamoorthy, M. S., James R. Loy, and John F. McDonald. "Optimal Differential Routing based on Finite State Machine Theory." VLSI Design 9, no. 2 (1999): 105–17. http://dx.doi.org/10.1155/1999/83648.

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Noise margins in high speed digital systems continue to erode. Full differential signal routing provides a mechanism for deferring these effects. This paper proposes a three stage routing process for solving the adjacent placement routing problem of differential signal pairs, and proves that it is optimal. The process views differential pairs as logical nets; routes the logical nets; then bifurcates the result to achieve a physical realization. Finite state machine theory provides the critical theoretical underpinning and formal proof of correctness necessary for linear time bifurcation. Regul

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Zheng, Jin, Jinku Li, Yi Li, and Lihui Peng. "A Benchmark Dataset and Deep Learning-Based Image Reconstruction for Electrical Capacitance Tomography." Sensors 18, no. 11 (2018): 3701. http://dx.doi.org/10.3390/s18113701.

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Electrical Capacitance Tomography (ECT) image reconstruction has developed for decades and made great achievements, but there is still a need to find a new theoretical framework to make it better and faster. In recent years, machine learning theory has been introduced in the ECT area to solve the image reconstruction problem. However, there is still no public benchmark dataset in the ECT field for the training and testing of machine learning-based image reconstruction algorithms. On the other hand, a public benchmark dataset can provide a standard framework to evaluate and compare the results

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35

Luo, Kuan. "Investigation on Machinery Control System Based on Fuzzy PID Control Technology." Applied Mechanics and Materials 203 (October 2012): 130–34. http://dx.doi.org/10.4028/www.scientific.net/amm.203.130.

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This review gives the basic concept、mechanism、and algorithm of automatic controlling theory，puts forward some views for the design of automatic control system，designs a new model for the rotational speed control of the stepping electrical machine.

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ROSKA, TAMÁS. "COMPUTATIONAL AND COMPUTER COMPLEXITY OF ANALOGIC CELLULAR WAVE COMPUTERS." Journal of Circuits, Systems and Computers 12, no. 04 (2003): 539–62. http://dx.doi.org/10.1142/s0218126603001021.

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The CNN Universal Machine is generalized as the latest step in computational architectures: a Universal Machine on Flows. Computational complexity and computer complexity issues are studied in different architectural settings. Three mathematical machines are considered: the universal machine on integers (UMZ), the universal machine on reals (UMR) and the universal machine on flows (UMF). The three machines induce different kinds of computational difficulties: combinatorial, algebraic, and dynamic, respectively. After a broader overview on computational complexity issues, it is shown, following

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Caner, Murat, Chris Gerada, Greg Asher, and Tolga Özer. "Design optimization of Halbach array permanent magnet motor to achieve sensorless performance using genetic algorithm." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 5 (2016): 1741–59. http://dx.doi.org/10.1108/compel-06-2015-0218.

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Purpose The purpose of this paper is to investigate Halbach array effects in surface mounted permanent magnet machine (SMPM) in terms of both self-sensing and torque capabilities. A comparison between a conventional SMPM, which has radially magnetized rotor, and a Halbach machine has been carried out. Design/methodology/approach The geometric parameters of the two machines have been optimized using genetic algorithm (GA) with looking Pareto. The performance of the machines’ geometry has been calculated by finite element analysis (FEA) software, and two parametric machine models have been reali

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Khadar, Saad, Abdellah Kouzou, Mohamed Mounir Rezzaoui, and Ahmed Hafaifa. "Sensorless Control Technique of Open-End Winding Five Phase Induction Motor under Partial Stator Winding Short-Circuit." Periodica Polytechnica Electrical Engineering and Computer Science 64, no. 1 (2019): 2–19. http://dx.doi.org/10.3311/ppee.14306.

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Open-end winding induction machines are gaining more attention in the last years due to their attractive advantages in the industrial applications, where high reliability is required. However, despite their inherit robustness, they are subjected to various electrical or mechanical faults that can ultimately reduce the motor efficiency and later leads to full failure. This paper proposes a method of modeling the five phase induction machine with open end stator winding taking into consideration the short-circuit fault between turns. The fault modeling is based on the theory of electromagnetic c

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Quintal-Palomo, Roberto Eduardo, Maciej Gwozdziewicz, and Mateusz Dybkowski. "Modelling and co-simulation of a permanent magnet synchronous generator." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 6 (2019): 1904–17. http://dx.doi.org/10.1108/compel-12-2018-0501.

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Purpose The purpose of this paper is to obtain an accurate methodology for modelling and analysis of the permanent magnet synchronous generator connected to power electronic components. Design/methodology/approach This paper presents the methodology of the co-simulation of a permanent magnet synchronous generator. It combines Simulink, Maxwell and Simplorer software to demonstrate the electrical machine behaviour connected with the power electronics’ circuit. The finite element analysis performed on the designed machine exhibit a more accurate behaviour over simplified Simulink models. Results

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Rahnama, Mehdi, Abolfazl Vahedi, Arta Mohammad-Alikhani, and Noureddine Takorabet. "Diagnosis of brushless synchronous generator using numerical modeling." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 39, no. 5 (2020): 1241–54. http://dx.doi.org/10.1108/compel-01-2020-0018.

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Purpose On-time fault diagnosis in electrical machines is a critical issue, as it can prevent the development of fault and also reduce the repairing time and cost. In brushless synchronous generators, the significance of the fault diagnosis is even more because they are widely used to generate electrical power all around the world. Therefore, this study aims to propose a fault detection approach for the brushless synchronous generator. In this approach, a novel extension of Relief feature selection method is developed. Design/methodology/approach In this paper, by taking the advantages of the

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Cao, Ming Rang, Shi Chun Yang, Wen Hui Li, and Sheng Qiang Yang. "Experimental Research on Small Holes by Electrical Discharge Machining Combined with Ultrasonic Vibration and Assisted Inwall Polish with the Ultrasonic Vibrating." Key Engineering Materials 359-360 (November 2007): 374–78. http://dx.doi.org/10.4028/www.scientific.net/kem.359-360.374.

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The EDM can machined some superhard conducting material that cannot be handled by the traditional method, such as carbide alloy, tool steel and engineering materials etc., however, it is also accompanied with slow material removal rate(MRR) and poor surface quality (surface roughness). For some fine machining having rigorous criterion on size and surface roughness, the EDM cannot meet the demand. Some researches indicate that the MRR of small hole by electrical discharge machining combined with ultrasonic vibration (UEDM) can increase in certain range, but the surface quality is still poor. Al

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Schlensok, C., B. Schmülling, M. van der Giet, and K. Hameyer. "Electromagnetically excited audible noise – evaluation and optimization of electrical machines by numerical simulation." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 26, no. 3 (2007): 727–42. http://dx.doi.org/10.1108/03321640710751181.

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PurposeDisturbing vibrations and noise of electrical machines are gaining impact. The paper aims to focus on the necessity of estimating the electromagnetic, structure‐dynamical, and acoustic behaviour of the machine during designing and before proto‐typing.Design/methodology/approachAn adequate tool is numerical simulation applying the finite‐element method (FEM) and the boundary‐element method (BEM) allowing for the structured analysis and evaluation of audible noise also caused by manufacturing tolerances.FindingsThe simulated results show good accordance to measurement results. The methods

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Yang, Guang Chun, and Qi Zhang. "The PLC Control System Design of Radial Drilling." Advanced Materials Research 850-851 (December 2013): 665–68. http://dx.doi.org/10.4028/www.scientific.net/amr.850-851.665.

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Focus on the disadvantages such as complicated circuit , poor reliability, difficulty troubleshooting and etc of the traditional relay-contactor control system of Z3040 radial drilling machine, the PLC control system design plan was proposed, the hardware and software design of electrical control system included the PLC selection, the I/O terminal assignments, the I/O hardware wiring diagram drawing as well as the PLC ladder program design was completed in this thesis based on control theory analysis of radial drilling machine.

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Schmuelling, Christoph, Christian Kreischer, and Marek Gołebiowski. "Investigation of the stator inductances of the expanded Park model and an approach on parameter identification using the evolution strategy." Archives of Electrical Engineering 65, no. 3 (2016): 585–99. http://dx.doi.org/10.1515/aee-2016-0042.

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Abstract Commonly, the Park model is used to calculate transients or steady-state operations of synchronous machines. The expanded Park theory derives the Park equations from the phase-domain model of the synchronous machine by the use of transformations. Thereby, several hypothesis are made, which are under investigation in this article in respect to the main inductances of two different types of synchronous machines. It is shown, that the derivation of the Park equations from the phase-domain model does not lead to constant inductances, as it is usually assumed for these equations. Neverthel

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Jumayev, Sultan, Aleksandar Borisavljevic, Konstantin Boynov, Juha Pyrhönen, and 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, no. 2 (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 i

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Izadfar, Hamid Reza, and Hamid Naseri. "Dynamic and steady state modeling of permanent magnet induction machine." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 1 (2018): 465–83. http://dx.doi.org/10.1108/compel-03-2017-0136.

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Purpose Modeling electric machines is one of the powerful approaches for analyzing their performance. A dynamic model and a steady-state model are introduced for each electric machine. Permanent magnet induction machine (PMIM) is a dual-rotor electric machine, which has various advantages such as high-power factor and low magnetizing current. Studying PMIM and its modeling might be valuable. The purpose of this paper is to introduce a simple and accurate method for dynamic and steady-state modeling of PMIM. Design/methodology/approach In this paper, arbitrary dqo reference frame is used to mod

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Sui, Yi, Ping Zheng, Peilun Tang, Fan Wu, and Pengfei Wang. "A five-phase 20-slot/18-pole PMSM for electric vehicles." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 439–55. http://dx.doi.org/10.1108/compel-02-2015-0106.

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Purpose – The purpose of this paper is to investigate a five-phase permanent-magnet synchronous machine (PMSM) that features high-power density and high-fault-tolerant capability for electric vehicles (EVs). Design/methodology/approach – The five-phase 20-slot/18-pole PMSM is designed by finite-element method. Two typical rotor structures which include Halbach array and rotor eccentricity are compared to achieve sinusoidal back electromotive force (EMF). The influence of slot dimensions on leakage inductance and short-circuit current is analyzed. The method to reduce eddy current loss of perma

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Zhao, Shu Guo, Rui Li, and Xiao Min Yao. "Study on the Surface Roughness of Titanium Alloy Machined by WEDM." Advanced Materials Research 683 (April 2013): 581–84. http://dx.doi.org/10.4028/www.scientific.net/amr.683.581.

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Due to the excellent characteristics of titanium alloy, was applied to aviation, marine, automotive, metallurgy, medical equipment and other fields. However, some of the characteristics make it machine difficultly, so the range of applications would be limited. In this paper, titanium alloy is cut by wire electrical discharge machining (WEDM) and study the surface finish. The model of surface roughness is established which is based on theoretical analysis. Experimental results were analyzed and optimized by the theory of signal-to-noise ratio and grey relational analysis (GRA) method. The mini

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Hou, Bo, Congpeng Zhang, and Shoubo Yang. "Computer Vision Tool-Setting System of Numerical Control Machine Tool." Sensors 20, no. 18 (2020): 5302. http://dx.doi.org/10.3390/s20185302.

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An automatic tool-setting and workpiece online detecting system was proposed to study the key technologies of next-generation intelligent vision computerized numerical control (CNC) machines. A computer vision automatic tool-setting system for a CNC machine was set up on the basis of the vision tool-setting principle. A rapid vision calibration method based on the position feedback from the CNC machine was proposed on the basis of the theory of traditional vision system calibration. The coordinate mapping relationship of the image and the CNC machine, the tool-setting mark point on the workpie

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Balda, J. C., M. F. Hadingham, R. E. Fairbairn, R. G. Harley, and E. Eitelberg. "Measurement of Synchronous Machine Parameters by a Modified Frequency Response Method???Part I: Theory." IEEE Power Engineering Review PER-7, no. 12 (1987): 40–41. http://dx.doi.org/10.1109/mper.1987.5526840.

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