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Journal articles on the topic 'Electrical machine with a solid rotor'

Author: Grafiati

Published: 28 June 2021

Last updated: 4 February 2022

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1

Zablodskiy, М., V. Pliuhin, and R. Chuenko. "SIMULATION OF INDUCTION MACHINES WITH COMMON SOLID ROTOR." Tekhnichna Elektrodynamika 2018, no. 6 (October 25, 2018): 42–45. http://dx.doi.org/10.15407/techned2018.06.042.

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2

SCHIEBER, D., and L. SCHACHTER. "ELECTRODYNAMICS OF SOLID ROTOR INDUCTION MACHINE WITH STATOR LOSSES." Electric Machines & Power Systems 12, no. 1 (January 1987): 13–25. http://dx.doi.org/10.1080/07313568708960092.

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3

Narchail, Sakshi, Syed Shahjahan Ahmad, Shreyas Srivatsa, Mouli Thirumalasetty, Pramod Kumar, and G. Narayanan. "Experimental Vibration Studies on a Solid-Rotor Switched Reluctance Machine." IEEE Transactions on Industry Applications 57, no. 5 (September 2021): 4852–63. http://dx.doi.org/10.1109/tia.2021.3099464.

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4

Andresen, E., B. Racinowski, and G. Szymański. "NUMERICAL SIMULATION OF HIGH SPEED INDUCTION MACHINE WITH SOLID ROTOR." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 14, no. 4 (April 1995): 97–100. http://dx.doi.org/10.1108/eb051922.

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5

Fratila, Mircea, Abdelkader Benabou, Abdelmounaim Tounzi, and Maxime Dessoude. "Calculation of Iron Losses in Solid Rotor Induction Machine Using FEM." IEEE Transactions on Magnetics 50, no. 2 (February 2014): 825–28. http://dx.doi.org/10.1109/tmag.2013.2281492.

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6

Felicetti, Roberto, Curt Johan David Abrahamsson, and Urban Lundin. "The influence of eddy currents on the excitation winding impedance of solid and laminated salient pole synchronous machines." Electrical Engineering 102, no. 4 (July 1, 2020): 2553–66. http://dx.doi.org/10.1007/s00202-020-01053-z.

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Abstract This work investigates the establishment of steady-state eddy currents in solid and laminated salient poles and rotor rim of synchronous machines due to a periodic excitation voltage. It shows that the presence of eddy currents in the rotor magnetic circuit has the double effect of increasing the excitation winding AC-resistance and decreasing its magnetizing AC-inductance. According to that a simple analytical model is presented in here which allows a rapid rough estimation of the excitation winding AC-resistance when little information is available about the machine geometry and its electric/magnetic materials properties. The model is then verified by reproducing in frequency the excitation winding AC-resistance and the related power loss measured in two synchronous generators. Finally, the limits of reliability and applicability of the model are discussed. The model has implications for periodic field winding current control and voltage regulation in synchronous machines.

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7

Keyhani, A., S. Hao, and G. Dayal. "Maximum Likelihood Estimation of Solid-Rotor Synchronous Machine Parameters from SSFR Test Data." IEEE Power Engineering Review 9, no. 9 (September 1989): 56. http://dx.doi.org/10.1109/mper.1989.4310976.

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8

Di, Chong, Ilya Petrov, and Juha Pyrhonen. "Modeling and Mitigation of Rotor Eddy-Current Losses in High-Speed Solid-Rotor Induction Machines by a Virtual Permanent Magnet Harmonic Machine." IEEE Transactions on Magnetics 54, no. 12 (December 2018): 1–12. http://dx.doi.org/10.1109/tmag.2018.2873279.

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9

Dalabeeh, Ali, Al-Mofleh Anwar, Tariq M. Younes, Ayman Al-Rawashdeh, and Ayman Hindi. "Increasing the required slip range of wound induction generator in wind power systems." Bulletin of Electrical Engineering and Informatics 9, no. 2 (April 1, 2020): 436–42. http://dx.doi.org/10.11591/eei.v9i2.1795.

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Eddy currents losses in the rotor in high power generators do not allow operators, under high values of slip, to regulate voltage and control of reactive power flow. The paper presents a method that can accurately estimate the eddy current losses in electric machines with a less complicated procedure. The suggested method allows researchers to analyze and reduce the losses, and consequently, to improve the wind turbine induction generators efficiencies. The given approach, based on the conventional electric machine theory and the parameters supplied by the manufacturers, predicts the eddy current losses theoretically without the need of the measured material loss data or BH curve. Increasing the range of slip variation of induction motor can be achieved by using a rotor of two layers in the radial direction with different parameters. The first layer is a laminated layer of height (h), and the second is a solid (the rotor yoke). The computation of eddy current losses is useful to change the design of the machine to minimize the losses. This paper presents a detailed modeling of the effect parameters on the eddy current losses in wind turbine induction generator.

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10

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 (July 1, 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 the diamond enriched lamination insulation is published for the benefit of the scientific community. Design/methodology/approach The windings of electrical machines are insulated to avoid contact between the coil and other conductive components, for example, the stator core. The principle of using mica tape and resin impregnation has not changed for a century and is well established to produce main insulation on a complex conductor shape and size. These insulations have poor heat-conducting properties. Similarly, the insulation of laminated steel sheets comprising the stator and rotor restrict heat flow. Diamond-based insulation provides a new path. Increased thermal conductivity means reduced temperature rise and the reduced thermal time constants in multi-physics simulations and system analysis. Findings The largest benefit of a diamond-based core insulation is in electrical machines in which the losses are conducted axially to the coolant. These are machines with radial ducts and effective cooling in the end regions. The main benefit will be in reducing the number of radial ducts that positively affect the size, production costs and the copper losses of the machine. The increased thermal conductivity of the diamond insulation system will reduce the thermal constants noticeably. These will affect system behavior and the corresponding simulation methods. Originality/value Diamond insulation can lead to a paradigm change for electrical machine winding and lamination insulation design and thermal management. It might also lead to new modeling requirements in system analysis.

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11

Annenkov, A. N., S. V. Sizikov, and A. I. Shiyanov. "ASYNCHRONOUS MOTOR WITH A HOLLOW PERFORATED ROTOR." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 61, no. 2 (April 5, 2018): 129–40. http://dx.doi.org/10.21122/1029-7448-2018-61-2-129-140.

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The paper presents a brief analysis of the conducted researches of the asynchronous executive motors and the induction motor, as well as the design of the asynchronous executive motor with a hollow perforated rotor. The basic relationships for determining the geometry of the rotor that directly influences the energy performance of the electric machine are also presented. The calculations to determine the geometry of the windows, located within a part of the active length of the stator package in the zone adjacent to the solid frontal area of the surface of the barrel from the side of its end face that is opposite to the bottom of the rotor barrel. In an asynchronous motor with a hollow perforated rotor improvement of energy performance (increase of maximum torque, efficiency and cosj of the engine) is achieved. These advantages are provided by the fact that the windows in the hollow rotor barrel are located within the part of the active length of the stator package in the zone adjacent to the solid frontal section of the rotor barrel surface on its end face that is opposite to the bottom of the barrel. In accordance with the design of the hollow rotor, the bottom of the barrel of one of the ends acts as superconducting short-circulating ring, therefore the ratio of increase in resistance (caused by the transverse edge effect) depends on the distribution of the rotor currents in the area adjacent to the solid frontal portion of the surface of the barrel on end that is opposite to the bottom of the barrel. In the analysis of current density distribution in a hollow rotor with the axial length L', all electric constant and geometric dimensions that are taken into account in the calculation are known values. Arbitrarily set constants are the primary currents and the rotational frequency of the rotor. With the rotation speed increase, due to the presence of the windows on one end face of the rotor and to the impact of the bottom of the barrel on the other one, the elementary currents of the rotor within the active length of the machine boring would be directed mainly in the axial direction, including the cases of comparatively small slippage that corresponds to the small frequency of the alternating magnetization of the rotor material. I. e. a certain part of the active surface of the rotor on the end that is opposite to the bottom of its barrel would not function as the frontal part of the winding while reducing the frequency of currents in the rotor material. This provides an increase in the active component of the rotor current that is proportional to the electromagnetic torque of the motor. Correspondingly, the frontal parts of equivalent winding of the hollow rotor (through which the currents do not generate torque) would not be spread at high rotational speeds to the area of the active length of the machine.

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12

Jae-Do Park, C. Kalev, and H. Hofmann. "Modeling and Control of Solid-Rotor Synchronous Reluctance Machines Based on Rotor Flux Dynamics." IEEE Transactions on Magnetics 44, no. 12 (December 2008): 4639–47. http://dx.doi.org/10.1109/tmag.2008.2003501.

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13

Garbiec, Tomasz, and Mariusz Jagiela. "Accounting for Slot Harmonics and Nonsinusoidal Unbalanced Voltage Supply in High-Speed Solid-Rotor Induction Motor Using Complex Multi-Harmonic Finite Element Analysis." Energies 14, no. 17 (August 30, 2021): 5404. http://dx.doi.org/10.3390/en14175404.

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Solid rotor induction machines are still used in high-speed systems. A two-dimensional field-circuit model based on the finite element method and the complex magnetic vector potential has been shown as a very time-effective tool in the analysis of their steady states compared to time-domain models. This continuation work presents a validated computational algorithm that enables the inclusion of the nonsinusoidal and/or asymmetrical voltage supply in the multi-harmonic field-circuit model of these machines that was presented in the previous works by the authors. The extended model accounts for both spatial harmonics due to slotting and/or winding distribution and the time-harmonics due to voltage waveform. The applicability range of the model therefore increases to cases when the machine is supplied with a nonsinusoidal three-phase system of voltages with symmetry or asymmetry that can be decomposed into three symmetrical components. Its short execution time characteristic allows for much more insightful design studies of the contribution of voltage supply- and slotting-related harmonics to the overall efficiency of the machine than is possible with the time-consuming time-domain models. The proposed computational framework has never been presented in the literature. The model is verified positively by the comprehensive time-domain model. It is especially useful in design studies on solid rotor induction motors related to the optimisation of the efficiency of induction motor-based drive systems.

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14

Zaïm, M. E. "Design and Performance of the Solid Rotor Reluctance Machines." Electric Power Components and Systems 29, no. 12 (December 2001): 1161–74. http://dx.doi.org/10.1080/153250001753246880.

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15

Krefta, M. P., and O. Wasynczuk. "A Finite Element Based State Model of Solid Rotor Synchronous Machines." IEEE Power Engineering Review PER-7, no. 3 (March 1987): 29–30. http://dx.doi.org/10.1109/mper.1987.5527359.

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16

Pyrhönen, J., and P. Kurronen. "Increasing the efficiency of high-speed solid-rotor induction machines." European Transactions on Electrical Power 4, no. 2 (September 6, 2007): 101–7. http://dx.doi.org/10.1002/etep.4450040203.

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17

Ahmad, Syed Shahjahan, and G. Narayanan. "Experimental Investigations on Flux-Linkage Characteristics and Stator-Side Modeling of a Solid-Rotor Switched Reluctance Machine." IEEE Transactions on Industrial Electronics 67, no. 12 (December 2020): 10180–90. http://dx.doi.org/10.1109/tie.2019.2959496.

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18

Fang, Haiyang, Dawei Li, Ronghai Qu, Jian Li, Cong Wang, and Bao Song. "Rotor Design and Eddy-Current Loss Suppression for High-Speed Machines With a Solid-PM Rotor." IEEE Transactions on Industry Applications 55, no. 1 (January 2019): 448–57. http://dx.doi.org/10.1109/tia.2018.2871095.

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19

Krefta, M. P., and O. Wasynezuk. "A Finite Element based State Model of Solid Rotor Synchronous Machines." IEEE Transactions on Energy Conversion EC-2, no. 1 (March 1987): 21–30. http://dx.doi.org/10.1109/tec.1987.4765800.

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20

Bumby, J. R., E. Spooner, and M. Jagiela. "Equivalent circuit analysis of solid-rotor induction machines with reference to turbocharger accelerator applications." IEE Proceedings - Electric Power Applications 153, no. 1 (2006): 31. http://dx.doi.org/10.1049/ip-epa:20050254.

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21

Li, Wei Li, Zhi Peng Li, and Ting Ting Chen. "Influence of Rotor Structure on Starting Performance of PMSM Used for HEV." Advanced Materials Research 383-390 (November 2011): 1855–61. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1855.

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Permanent magnet synchronous motor (PMSM) used for driving hybrid electric vehicle (HEV) have the characteristics of high power density, high efficiency, high reliability and good dynamic performance. However, it’s a very complex process for PMSM pulling into synchronization and it is difficult to analyze and calculate the starting and operating performance exactly, which would be very important for HEV application. So based on the requirement of HEV, a 30kw PMSM is studied. The 2D transient electromagnetic fields of this motor were calculated by using an improved finite element method. Starting performance was analyzed, and some parameters such as stator current and time-speed characteristic could be obtained. From the study on performance of machine with different ratio of spacing of damping bar (Lb) / stator pitch (Ls) in solid rotor and different number of damping bars in laminated rotor, that influence of rotor structure on starting process were studied. The calculated results show good agreement with the experimental data. Some reasonable conclusions were obtained, which could provide some help for the design of this kind of PMSM and the application of it in HEV.

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22

Raisanen, Ville, Saku Suuriniemi, Stefan Kurz, and Lauri Kettunen. "Rapid Computation of Harmonic Eddy-Current Losses in High-Speed Solid-Rotor Induction Machines." IEEE Transactions on Energy Conversion 28, no. 3 (September 2013): 782–90. http://dx.doi.org/10.1109/tec.2013.2268278.

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23

Drubel, O., and B. Runge. "Temperature rise within the rotor of squirrel cage induction machines with solid iron and laminated rotors during run up and standstill." Electrical Engineering (Archiv fur Elektrotechnik) 86, no. 2 (January 1, 2004): 97–103. http://dx.doi.org/10.1007/s00202-003-0187-1.

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24

Pyrhönen, Juha, Janne Nerg, Aki Mikkola, Jussi Sopanen, and Tuomo Aho. "Electromagnetic and mechanical design aspects of a high-speed solid-rotor induction machine with no separate copper electric circuit in the megawatt range." Electrical Engineering 91, no. 1 (April 30, 2009): 35–49. http://dx.doi.org/10.1007/s00202-009-0114-1.

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25

Pyrhönen, Juha, Janne Nerg, Jussi Sopanen, Aki Mikkola, and Tuomo Aho. "Electromagnetic and mechanical design aspects of a high-speed solid-rotor induction machine with no separate copper electric circuit in the megawatt range." Electrical Engineering 91, no. 2 (June 27, 2009): 115. http://dx.doi.org/10.1007/s00202-009-0115-0.

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26

Ghiban, Brandusa, Carmen Anca Safta, and Vlad Motoiu. "Stainless Steels as Erosion Resistant Materials for Hydraulic Machines." Key Engineering Materials 750 (August 2017): 75–79. http://dx.doi.org/10.4028/www.scientific.net/kem.750.75.

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The corrosion phenomena lead to serious modifications in the structure of metallic materials from which are manufactured the important active components of hydraulic machines. There are two important types of corrosion: cavitation and silt erosion (abrasive erosion), that are specific to machines which are producing energy [1, 2, 3]. As a corrosion mechanism, in hydrodynamic cavitation [4, 5], when cavitation bubbles implode on the solid surface of hydraulic machine component, the local pressure developed is high and can exceed the fatigue strength, yield point or compression strength of the material. Cavitation phenomenon can be produced in different ways. Four types of cavitation are described in the literature, looking for the method of producing, [6]: hydrodynamic cavitation, particle cavitation, acoustic cavitation, and optic cavitation. Abrasive erosion is the gradual degradation of a structure under the action of solid particles suspended in the working fluid. Impact and sliding erosion are the main categories of abrasive erosion approached in the literature by considering the mechanisms of which the abrasive particles act on the metallic surface, [2]. In the last decades the abrasive erosion phenomenon became a serious problem for the efficient operation of power plants, for instance in hydropower plants [7, 8]. Geothermal energy is the heat energy of the earth given by capturing the springs of heat water. In Romania the geothermal energy is used only for heating because the water has a low temperature and cannot be used to produce electric energy, only heat energy. So, although Romania is the third highest potential geothermal in Europe, practically electric energy from geothermal resource has a low thermal potential, [9]. A steam turbine is working at high rotational speed, high temperatures and using the working fluid which could be steam or wet steam. The working fluid is composed of corrosive chemicals with an aggressive pH. For this reason the common problems of the geothermal steam turbine failures are given by fractures of the blades (rotor blades or stator blades).

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27

Shisha, Samer, Chandur Sadarangani, and Hans-Peter Nee. "The Effect of Copper Coating on the Losses in the Solid Pole-Plates of Inverter-Fed Wound Rotor Synchronous Machines." IEEE Transactions on Energy Conversion 28, no. 2 (June 2013): 298–307. http://dx.doi.org/10.1109/tec.2013.2251419.

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28

Christensen, G. S., and S. A. Soliman. "Least absolute value estimation of the generalized operational impendances of solid-rotor synchronous machines from standstill frequency response test data." Electric Power Systems Research 21, no. 2 (June 1991): 91–98. http://dx.doi.org/10.1016/0378-7796(91)90022-f.

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29

Marcsa, D., and M. Kuczmann. "Comparison of the ${\mbi A}^{*}{-}{\mbi A}$ and ${\mbi T}, \Phi{-}\Phi$ Formulations for the 2-D Analysis of Solid-Rotor Induction Machines." IEEE Transactions on Magnetics 45, no. 9 (September 2009): 3329–33. http://dx.doi.org/10.1109/tmag.2009.2022328.

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30

El Hadi Zaim, M. "High-Speed Solid Rotor Synchronous Reluctance Machine Design and Optimization." IEEE Transactions on Magnetics 45, no. 3 (March 2009): 1796–99. http://dx.doi.org/10.1109/tmag.2009.2012824.

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31

Xing, Jun Qiang, Lei Chen, Qi Zhang, and Yun Fei Ma. "Design and Analysis of Fan-Cooling for High Speed Permanent Magnet Machine Rotor." Advanced Materials Research 591-593 (November 2012): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.3.

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Compared with common permanent magnet (PM) machine, the high speed PM machine has smaller size and larger power density. However, owing to high-speed high frequency and small volume, the PM rotor is more easily to become overheated so that irreversible demagnetization of the PM is induced. Traditional cooling methods of machine directly cool the machine stator, the temperature rise of rotor is reduced through heat exchange among stator, air gap and rotor. Owing to rapid temperature rise of high speed PM machine rotor, the method of indirect cooling rotor does not effectively protect PM rotor from overheating. To directly reduce the temperature rise of PM rotor and the volume of machine, design method of fan-cooling for high speed PM machine rotor is proposed in this paper, that is, high speed axial fan rotating synchronously with the high speed PM machine rotor is designed. Finally, the temperature rise of high speed PM machine rotor with the structure of high speed axial fan is analyzed based on the coupling method of fluid-solid, the validity is verified.

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32

Benheniche, Abdelhak, and Farid Berrezzek. "Integral Backstepping Control of Induction Machine." European Journal of Electrical Engineering 23, no. 4 (August 31, 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 integration of the stator voltage expressions. The simulation results illustrate the effectiveness of the proposed control scheme under load disturbances, rotor resistance variation and low and high speed.

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33

Jurca, Florin-Nicolae, Razvan Inte, and Claudia Martis. "Optimal rotor design of novel outer rotor reluctance synchronous machine." Electrical Engineering 102, no. 1 (May 23, 2019): 107–16. http://dx.doi.org/10.1007/s00202-019-00786-w.

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34

Arkkio, Antero, Adam Biernat, Bogdan Bucki, Grzegorz Kaminski, Asko Niemenmaa, Andrzej Smak, and Pawel Staszewski. "Finite-Element Analysis for a Rolling-Rotor Electrical Machine." IEEE Transactions on Magnetics 46, no. 8 (August 2010): 2727–30. http://dx.doi.org/10.1109/tmag.2010.2044234.

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35

Jagiela, Mariusz, and Tomasz Garbiec. "Determination of best rotor length in solid-rotor induction motor with axial slitting." Archives of Electrical Engineering 61, no. 2 (June 1, 2012): 267–76. http://dx.doi.org/10.2478/v10171-012-0022-2.

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Determination of best rotor length in solid-rotor induction motor with axial slitting The efficiency of the solid-rotor induction machines depends on axial length of rotor (including the end-regions). Determination of the best axial length is problematic because of current density distribution in the end-regions and also because of absence of dedicated methods and models. This work proposes a method that circumvents this difficulty. It is based on the numerical determination of a dimensionless rotor-end factor using a combination of three- and two-dimensional finite element models restricted to the motor rotor. Such the end factor can be used in both analytical and numerical model of the machine in order to determine the typical performance characteristics. In this work, using this method, we determined an optimal length of the slitted solid rotor of a motor operating at 12 000 rpm, that maximizes the motor efficiency. The results of computations and measurements, carried out on the laboratory test-stand, are presented.

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36

Yaroshevich, N. P., I. P. Zabrodets, and T. S. Yaroshevich. "Dynamics of Starting of Vibrating Machines with Unbalanced Vibroexciters on Solid Body with Flat Vibrations." Applied Mechanics and Materials 849 (August 2016): 36–45. http://dx.doi.org/10.4028/www.scientific.net/amm.849.36.

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Expressions for vibration moments (additional dynamic loading caused by the vibrations of bearing body) during the passage of resonant zone by vibration machines with the flat vibrations of bearing body both with one arbitrarily located vibration exciter and with two self-synchronization vibration exciters for the different modes of starting are got in an analytical form. Possibilities of improvement of process of running approach of vibration machines with unbalanced vibration exciters are demonstrated by using of methods of the "double" (in case of one vibration exciter) and "separate" starting of electric motors (in case of two vibration exciters). It is shown that the first method is based on using of semislow vibrations arising in the resonant zone. The necessary condition of the successful using of this method is motion on the rotor of exciter in the moment of the repeated including of engine of rotary-type vibration moment. The conditions when the separate starting is effective are shown. Conclusions and practical recommendations that allow to facilitate starting of vibration machines with an unbalanced drive are pointed.

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37

Wang, Rui, Yuefang Wang, and Xinglin Guo. "Rotordynamic Analysis for a Turbo-Machine with Fluid-Solid Interaction and Rotation Effects." Mathematical Problems in Engineering 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/921095.

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The rotordynamics and fluid dynamics of a turbo-machine considering the effect of fluid-solid interaction (FSI) are numerically investigated using finite element software ADINA. The iterative method is adopted in computation of coupled fields of displacement and fluid. What distinguishes the present study from previous ones is the use of ADINA's rotational meshes and the FSI interface that separates the rotor surface from its surrounding fluid. The rotor's center orbit and frequency response as well as the transient fluid dynamics are obtained with various axial flow speeds. By including real rotating motion of the rotor, this paper presents a better way to solve complicated rotordynamic problems of turbo-machines that are operated in FSI circumstances.

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38

Kaplon, A., G. Utrata, and J. Rolek. "Estimators of induction motor electromechanical quantities built on the basis of a machine secondary multi-loop equivalent circuit." Archives of Electrical Engineering 63, no. 2 (June 1, 2014): 149–60. http://dx.doi.org/10.2478/aee-2014-0012.

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Abstract Contemporary sensorless AC drives require the use of electromechanical quantities estimation. The skin effect occurring in AC machines with solid secondary or with solid secondary elements causes machines of this type to be represented by equivalent circuits containing distributed elements, which makes the analysis of machine electrodynamic states more complicated and hinders the construction of relatively simple and effective estimators of electromechanical quantities. The variability of rotor parameters is modelled, with a good approximation, by the machine secondary multi-loop equivalent circuit with lumped elements. In this paper the construction procedure of electromechanical state variable estimators basing on this type of equivalent circuit will be presented. The simulation investigations of the created electromechanical quantities estimators, performed for the selected states of solid iron rotor AC machine operation will be shown as well.

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39

Boumegoura, T., J. C. Marques, H. Yahoui, G. Clerc, and H. Hammouri. "Rotor induction machine failure: Analysis and diagnosis." European Transactions on Electrical Power 14, no. 2 (March 2004): 71–84. http://dx.doi.org/10.1002/etep.4450140202.

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40

Paplicki, Piotr. "A novel rotor design for a hybrid excited synchronous machine." Archives of Electrical Engineering 66, no. 1 (March 1, 2017): 29–40. http://dx.doi.org/10.1515/aee-2017-0003.

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Abstract The paper presents three novel rotor design concepts for a three-phase electric controlled permanent magnet synchronous machine (ECPMS-machine) with hybrid excitation. The influence of magnets and flux-barriers arrangement on the magnetic field distribution and field-weakening characteristics of the machine is examined, based on a three-dimensional finite element analysis (3D-FEA). Moreover, a prototype rotor design based on a new rotor concept with a good field-weakening capability is presented in detail. Finally, the experimental results of no-load back electromotive force (back-EMF) waveforms and field-weakening characteristics versus a control coil current of the machine are reported.

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41

Yang, Yinye, Ali Emadi, and Nigel Schofield. "Double-rotor switched reluctance machine design, simulations, and validations." IET Electrical Systems in Transportation 6, no. 2 (June 1, 2016): 117–25. http://dx.doi.org/10.1049/iet-est.2015.0028.

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42

Jo, Young-Sik, Young-Kil Kwon, Myung-Hwan Sohn, Kang-Sik Ryu, Jung-Pyo Hong, and Ju Lee. "Temperature characteristic of rotor of HTS synchronous rotating machine cooled by solid nitrogen." Physica C: Superconductivity 372-376 (August 2002): 1535–38. http://dx.doi.org/10.1016/s0921-4534(02)01077-8.

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43

Keyhani, A., S. Hao, and G. Dayal. "Maximum likelihood estimation of solid-rotor synchronous machine parameters from SSFR test data." IEEE Transactions on Energy Conversion 4, no. 3 (1989): 551–58. http://dx.doi.org/10.1109/60.43262.

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Aydoun, Racha, Guillaume Parent, Abdelmounaïm Tounzi, and Jean-Philippe Lecointe. "Performance comparison of axial-flux switched reluctance machines with non-oriented and grain-oriented electrical steel rotors." Open Physics 18, no. 1 (December 17, 2020): 981–88. http://dx.doi.org/10.1515/phys-2020-0200.

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Abstract This paper studies the performance of an axial-flux switched reluctance machine (AFSRM) using GOES (grain-oriented electrical steel) in its rotor and comparing it to a NOES (non-oriented electrical steel) rotor. Indeed, the AFSRM structure lends itself well to the use of GOES, especially at the rotor. In order to evaluate the intrinsic capabilities of the AFSRM, self-inductance versus rotor position and static torque were numerically simulated at a given operating point and used as indicators for the NOES and GOES performance comparison. The static torque is also used to determine and compare the torque per volume ratios and grasp the impact of GOES use in a 3D rotating structure. The introduction of GOES in a rotating machine leads to an improvement of the electromagnetic torque mean and maximum values, allowing to evaluate the GOES impact on the machine performance.

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Lefik, Marcin, Krzysztof Komeza, Ewa Napieralska-Juszczak, Daniel Roger, and Piotr Andrzej Napieralski. "Comparison of the reluctance laminated and solid rotor synchronous machine operating at high temperatures." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 4 (July 1, 2019): 1111–19. http://dx.doi.org/10.1108/compel-10-2018-0405.

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Purpose The purpose of this paper is to present a comparison between reluctance synchronous machine-enabling work at high internal temperature (HT° machine) with laminated and solid rotor. Design/methodology/approach To obtain heat sources for the thermal model, calculations of the electromagnetic field were made using the Opera 3D program including effect of rotation and the resulting eddy current losses. To analyse the thermal phenomenon, the 3D coupled thermal-fluid (CFD) model is used. Findings The presented results show clearly that laminated construction is much better from a point of view of efficiency and temperature. However, solid construction can be interesting for high speed machines due to their mechanical robustness. Research limitations/implications The main problem, despite the use of parallel calculations, is the long calculation time. Practical implications The obtained simulation and experimental results show the possibility of building a machine operating at a much higher ambient temperature than it was previously produced for example in the vicinity of the aircraft turbines. Originality/value The paper presents the application of fully three-dimensional coupled electromagnetic and thermal analysis of new machine constructions designed for elevated temperature.

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Stephen Ejiofor, Oti, Ugwu Justin, Nnadi Damian Benneth, and Ogbuefi Uche. "Development and thermal modeling of an induction machine." International Journal of Engineering & Technology 8, no. 4 (November 5, 2019): 500. http://dx.doi.org/10.14419/ijet.v8i4.29727.

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In induction machines, the major concern is the temperature rise since it determines the maximum loading, in an attempt to avoid insula-tion deterioration and eventual loss of motor life. The effect of excessive heat in the motor stator and rotor windings and the stator mag-netic circuit can degrade the developed performance of the machine and also affect the motor loading and life span if not dispensed properly. This research work examines the thermal model for estimating the stator and rotor temperatures in cage induction motor. A state-variable model of the induction is used. The twin-axis stator reference frame is used to model the motor’s electrical behavior, because physical measurements are made in this reference frame. The thermal model is derived by considering the power dissipation, heat transfer and rate of temperature rise in the stator and rotor. The non-linear equations for electrical behavior of the motor and the thermal state equations for the stator and the rotor are solved using the MATLAB/Simulink blocks. This is to give room for the determination of the temperature of the stator and rotor windings inside the induction machine so as to evaluate the thermal stability of the induction motor and to check whether the insulation of the copper windings is sufficient at different operating conditions. It was found out from the thermal model analysis that the temperature of the stator and rotor windings increases due to stator and rotor copper losses which depend on the stator current. As the stator current is increased by increasing the torque, the temperature of each element is consequentially made to increase.

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Frosini, Lucia. "Novel Diagnostic Techniques for Rotating Electrical Machines—A Review." Energies 13, no. 19 (September 27, 2020): 5066. http://dx.doi.org/10.3390/en13195066.

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This paper aims to update the review of diagnostic techniques for rotating electrical machines of different type and size. Each of the main sections of the paper is focused on a specific component of the machine (stator and rotor windings, magnets, bearings, airgap, load and auxiliaries, stator and rotor laminated core) and divided into subsections when the characteristics of the component are different according to the type or size of the machine. The review considers both the techniques currently applied on field for the diagnostics of the electrical machines and the novel methodologies recently proposed by the researchers in the literature.

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Kłosowski, Zbigniew, and Sławomir Cieślik. "Real-Time Simulation of Power Conversion in Doubly Fed Induction Machine." Energies 13, no. 3 (February 4, 2020): 673. http://dx.doi.org/10.3390/en13030673.

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Currently used methods of simulation of doubly fed induction machines (DFIM), especially in real-time simulators (where a relatively large calculation step is used and high adequacy is required), do not provide the required adequacy, especially in rotor electrical circuits. In order to increase the adequacy of reproducing of electrical processes occurring in the circuits of the wound DFIM rotor, this paper presents a proposal and a verification of a new method of real-time simulation. The new method of mathematical modeling of electrical circuits uses voltage averaging at the calculation step. This method was supplemented by prediction of the machine’s rotor angle, which significantly increases the degree of adequacy of reproducing physical quantities present in DFIM, especially in the machine’s rotor. This method allows real-time simulation of electrical systems with a relatively large calculation step (of the order of 200 µs), while maintaining an appropriate degree of adequacy.

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Park, Jae-Do, Claude Kalev, and Heath F. Hofmann. "Analysis and Reduction of Time Harmonic Rotor Loss in Solid-Rotor Synchronous Reluctance Drive." IEEE Transactions on Power Electronics 23, no. 2 (March 2008): 985–92. http://dx.doi.org/10.1109/tpel.2007.915622.

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Novozhilov, A. N., A. O. Yussupova, and T. A. Novozhilov. "Determining the Displacement of the Rotor Shaft in an Electrical Machine." Russian Engineering Research 39, no. 10 (October 2019): 827–30. http://dx.doi.org/10.3103/s1068798x19100204.

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