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Journal articles on the topic 'Machine rotor'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Shostak, Yaroslav, Oleh Holovashchenko, Yuriy Reshetnikov, and Viktor Tkachenko. "Improving the technological process of balancing electric machine rotors on a balancing machine." Eastern-European Journal of Enterprise Technologies 4, no. 7 (130) (2024): 60–69. http://dx.doi.org/10.15587/1729-4061.2024.309867.

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The object of research is the process of dynamic balancing of rotors on a balancing machine in the process of restoring electric machines. The work is aimed at improving the quality of balancing rotors in the process of major repairs of traction electric motors for electric trains. The problem addressed was the quality of balancing the rotors of electric machines on stationary balancing machines. According to the conventional balancing technology, the rotor to be balanced is mounted on the supports of the balancing machine with support surfaces that usually have mechanical defects. These defec

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2

KOSIYUK, M., and А. KOSIYUK. "ROTOR-BLADE MACHINE." Herald of Khmelnytskyi National University. Technical sciences 285, no. 3 (2020): 114–17. https://doi.org/10.31891/2307-5732-2020-285-3-19.

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The world’s leading engine companies carry out research and development work aimed at improving the efficiency of heat engines, their reliability and durability, reducing weight and size, improving environmental performance, reducing fuel consumption and more. In the research of many companies, attempts are being made to fundamentally change the process of converting thermal energy into mechanical work. The use of rotor-blade engine design is one of the important areas of the process of improving heat engines. This gives a significant advantage over reciprocating engines in terms of specific d

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3

Shen, ZhiHuang, Bin Yao, BinQiang Chen, Wei Feng, and XiangLei Zhang. "A Novel Rotor Profile Error Tracing and Compensation Strategy for High Precision Machining of Screw Rotor Based on Trial Cutting of Limited Samples." Shock and Vibration 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/978325.

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The machining precision plays an important role in the operation reliability and service life of screw rotors. However, the actual machined rotor profile of screw rotors is different from its theoretical profile due to the errors of the machine tool. This paper proposes a novel method of error tracing and compensation to reduce the machined errors of rotor profile on the basis of the limited sample trials, and the method is based on a matrix of error compensation. The errors of rotor profile are obtained based on limited sample trials machining of screw rotors,and fitted into piecewise smooth

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4

Lacevic, H., A. Kovacevic, N. Stosic, and M. Read. "On Rotor Profling of Internally Geared Screw Machines." IOP Conference Series: Materials Science and Engineering 1322, no. 1 (2024): 012006. https://doi.org/10.1088/1757-899x/1322/1/012006.

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Abstract The internally geared screw machine represents a novel type of positive displacement compressor which consists of an inner and outer rotor. Both rotors rotate in the same direction but are each centered on offset parallel axes. The rotor profiles are designed to create multiple continuous contact points between the rotors, forming several separate working chambers whose volumes vary from minimum to maximum and back to minimum during a single rotation of the outer rotor. For a gas or two-phase working fluid, adjusting the discharge port geometry allows internal compression to occur bef

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Lebedev, Valeriy A., Georgy V. Serga, Irina V. Davydova, Tatiana V. Atoyan, Irina G. Koshlyakova, and Alexander V. Gordienko. "Main trends in intensification of rotor-screw processing of parts." MATEC Web of Conferences 226 (2018): 01008. http://dx.doi.org/10.1051/matecconf/201822601008.

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The ways of productivity increase in details finishing-strengthening processing executed in rotor-screw technological systems are presented. It is shown that the use of rotor-screw machines makes it possible to combine the parts machining using a vibrating field with a large amplitude of oscillations and their transportation in a streamlined form of production organization. Two main directions of rotor-helical processing stimulation are identified: on the basis of structural changes in the screw rotor, as the main working element of the rotor-screw machine and by equipping the screw rotor with

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6

Manich, A. M., M. D. De Castellar, A. Barella, and L. Castro. "Strength at “Theoretically Null Twist” of Acrylic and Polyester/Cotton Rotor Spun Yarns: Application to Prediction of “Machine Twist”." Textile Research Journal 58, no. 4 (1988): 238–45. http://dx.doi.org/10.1177/004051758805800409.

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Acrylic staple rotor spun yarns (172) obtained from a BD 200 rotor machine fitted with twelve different spinning heads that combined four different rotors and three different yarn extraction nozzles were tested for strength at a theoretically null twist. A high correlation existed between the theoretically null twist strength and the apparent loss of twist or residual twist. We propose a method for assessing the total twist or machine twist of the yarn from the apparent yarn twist measured in a twist tester and from the yarn strength at a theoretically null twist. Tests on fourteen polyester/c

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7

Hou, Xukui, Ende Wang, Hui Cao, Yalong Zhu, and Kai Qi. "Research on Dynamic Balance Adjustment Method of Single Braced Frame Gyroscope Rotor." MATEC Web of Conferences 256 (2019): 02005. http://dx.doi.org/10.1051/matecconf/201925602005.

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The uneven mass distribution of gyro rotors results in vibration, rotation and drift of gyro rotors, which seriously affect the performance index and life of gyro rotors. However, because there is no rigid connection between the rotary shaft and the shell of the gyro rotor, the dynamic balancing machine can only balance the vibration component of the single braced frame gyroscope rotor, and can’t measure the gyro rotor’s rotation component. By analyzing the influence of uneven rotor mass distribution on the gyro rotor performance, a method of eliminating two rotational degrees of freedom of th

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8

Gerlach, Martin Enno, Maximilian Zajonc, and Bernd Ponick. "Mechanical stress and deformation in the rotors of a high-speed PMSM and IM." e & i Elektrotechnik und Informationstechnik 138, no. 2 (2021): 96–109. http://dx.doi.org/10.1007/s00502-021-00866-5.

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AbstractHigh-speed electric machines are gaining importance in the field of traction drives and aviation due to their high power density. The evaluation of the mechanical stress in the rotor is one crucial part in the design process for this type of machines. The mechanical stress cannot be measured directly. Accordingly, a validation of the calculated mechanical stress is difficult and normally not performed. Instead of the mechanical stress, the deformation at the rotor surface can be measured using a spin test machine with distance sensors. The deformation can then be used to validate the c

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9

Mustafayev, Rauf, Nurali Yusifbayli, and Laman Hasanova. "Matrix structure of unified mathematical model of electric AC machines at control." E3S Web of Conferences 209 (2020): 02023. http://dx.doi.org/10.1051/e3sconf/202020902023.

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The matrix structure of the equations of a generalized electric alternating current machine is proposed, which, based on the Parke equations, is written in the coordinate axes of the machines rotating with the rotor speed. In the matrix structure, the column matrices of the derivatives of the stator, excitation and rotor windings are equal to the product of diagonal matrices consisting of the machine parameters and the column matrices of the flux links themselves and the sum of the matrix columns of the control parameters which are the matrix columns of the stator voltage, excitation voltage,

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10

Brandl, Lukas, Hans-Christian Reuss, and Daniel Heidle. "Approach to Design of Piezoelectric Energy Harvester for Sensors on Electric Machine Rotors." Energies 17, no. 8 (2024): 1884. http://dx.doi.org/10.3390/en17081884.

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The reliability and efficiency of components are key aspects in the automotive industry. Electric machines become the focus of development. Thus, improvements in efficiency and reliability have gained significance. While it is established to attach sensors to the fixed parts of machines, such as stators, moving parts like rotors pose a major challenge due to the power supply. Piezoelectric generators can operate as energy harvesters on rotors and thus enable the rotor-based integration of sensors. The research in this article proposes the first approach to the design of a piezoelectric energy

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11

Liu, Chen, Dewei Xu, Wenwu Wu, and Bo Yang. "Research on a Novel Flux-Switching Permanent Magnet Motor with Adjustable Torque Ripple Using an Auxiliary Rotor." Machines 12, no. 12 (2024): 929. https://doi.org/10.3390/machines12120929.

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In the field of material manufacturing, torsional vibration has some benefits for cutting or forming processing. In principle, torsional vibration can be caused by the torque ripples of a motor. Flux-switching permanent magnet (FSPM) motors are doubly salient and generate torque ripples, making them an option for manufacturing. However, the amplitude of the torque ripples is related to the motor structure, and frequency has a linear relationship with running speed. The torque ripples cannot be controlled separately from the motor running speed at conventional current excitations. Thus, a novel

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12

Tazeyev, I. R., S. O. Gaponenko, A. E. Kondratiev, and A. N. Zamaliev. "MODELING OF THE MACHINE FOR THE BALANCING OF THE ROTOR IN THE ANSYS SOFTWARE COMPLEX." Proceedings of the higher educational institutions. ENERGY SECTOR PROBLEMS 20, no. 5-6 (2018): 75–83. http://dx.doi.org/10.30724/1998-9903-2018-20-5-6-75-83.

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An imbalance appears during the manufacture, operation and maintenance of power equipment. The rotor imbalance arises due to the unbalanced masses of the rotor which leads to the emergence of variable loads on the supports and bending of the rotor. The dynamic balancing of the rotor on the balancing machine is the way to avoid the negative effects of centrifugal forces. The balancing machines in resonant and soft-bearing modes are usually used on modern production. However, these methods of balancing has a number of shortcoming, which can be solved by using the hard-bearing method. For example

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13

Khoshoo, Bhuvan, Anmol Aggarwal, and Shanelle Foster. "A Review of Segmented Stator and Rotor Designs in AC Electric Machines: Opportunities and Challenges." Eng 6, no. 1 (2025): 7. https://doi.org/10.3390/eng6010007.

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The use of segmented stator and rotor designs in AC electric machine construction offers several significant advantages, including a high-copper fill factor, increased torque density, improved field-weakening performance, simplified manufacturing processes, and enhanced mechanical strength. Additionally, segmented designs allow for the incorporation of oriented steel—either partially or fully—which exhibits excellent magnetic properties in the rolling direction, resulting in more efficient machine performance. However, lamination segmentation also introduces challenges. Parasitic air gaps betw

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14

Ali, Khaled Abdeen Mousa, Changyou Li, Han Wang, Ahmad Mostafa Mousa, and Marwa Abd-Elnaby Mohammed. "Enhancing the Performance of Sunflower Threshing Machines through Innovative Enhancements." Agriculture 14, no. 2 (2024): 312. http://dx.doi.org/10.3390/agriculture14020312.

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Improving the performance of the threshing process is of utmost importance in enhancing the quality of sunflower seeds and minimizing power consumption in sunflower production. In this study, we developed a modified sunflower threshing machine by incorporating two types of threshing rotors, namely the angled rasp bar rotor and the tine bar rotor, as compared to the round bar rotor. The performance of these rotors was evaluated under various rotational speeds (150, 200, 250, and 300 rpm) and concave clearances (10, 15, and 20 mm). The evaluation parameters included machine throughput, the speci

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15

Wang, Jiabao, Chao Guo, Wanyu Zhou, and Qin Wan. "Design and Analysis of a Superconducting Homopolar Inductor Machine for Aerospace Application." Electronics 13, no. 14 (2024): 2830. http://dx.doi.org/10.3390/electronics13142830.

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The electrically excited homopolar inductor machine has a static excitation coil as well as a robust rotor, which makes it attractive in the field of high-speed superconducting machines. This paper designed and analyzed a megawatt class superconducting homopolar inductor machine for aerospace application. To improve the power density, a mass-reduced rotor structure is proposed. Firstly, the main structure parameters of the superconducting homopolar inductor machine are derived based on the required power and speed. Secondly, the electromagnetic performance of the superconducting homopolar indu

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16

Sultan, Ibrahim A. "Profiling Rotors for Limaçon-to-Limaçon Compression-Expansion Machines." Journal of Mechanical Design 128, no. 4 (2005): 787–93. http://dx.doi.org/10.1115/1.2202877.

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Limaçon-to-limaçon compression-expansion machines have housings and rotors whose profiles are manufactured of limaçon curves. For these machines to perform satisfactorily, extreme care should be given to the geometric particulars of their rotor profile. The main characteristics that govern the quality of the rotor profile are the volumetric efficiency and the prevention of interference. In this work, the interference problem is handled from two different mathematical standpoints: the slope of tangents to both the rotor and housing curves at the apices; and the value of the minimum radial clear

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17

Escobar, Andrés, Gonzalo Sánchez, Werner Jara, et al. "Impact of Manufacturing Tolerances on Axial Flux Permanent Magnet Machines with Ironless Rotor Core: A Statistical Approach." Machines 11, no. 5 (2023): 535. http://dx.doi.org/10.3390/machines11050535.

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Axial Flux Permanent Magnet (AFPM) machines with ironless rotors are an attractive and recently studied solution in low-speed applications, due to their potentially high power/weight ratio, high aspect ratio, and high efficiency. Nevertheless, these machines are prone to be affected by manufacturing tolerance during its fabrication process and consequently, the magnets may move freely inside the rotor structure. This work presents a statistical analysis of manufacturing tolerances of an AFPM machine with an ironless rotor, considering several magnet fault types. A computationally efficient sup

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18

Zhang, Guanhua, and Geraint Wyn Jewell. "Combined Electromagnetic and Mechanical Design Optimization of Interior Permanent Magnet Rotors for Electric Vehicle Drivetrains." World Electric Vehicle Journal 15, no. 1 (2023): 4. http://dx.doi.org/10.3390/wevj15010004.

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In many high-speed electrical machines, centrifugal forces within the rotor can be first-order constraints on electromagnetic optimization. This can be particularly acute in interior permanent magnet (IPM) machines in which magnets are usually retained entirely by the rotor core with no additional mechanical containment. This study investigates the nature of the trade-off between mechanical and electromagnetic requirements within the context of an eight-pole, 100 kW IPM machine with a base speed of 4000 rpm and an extended speed range up to 12,000 rpm. A series of mechanical and electromagneti

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19

Awah, C. C., O. I. Okoro,, A. J. Onah, and G. C. Diyoke. "Estimation of losses and efficiency of double-stator switched flux permanent magnet machines." Nigerian Journal of Technological Development 19, no. 2 (2022): 150–55. http://dx.doi.org/10.4314/njtd.v19i2.7.

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Losses such as rotor iron and stator iron losses, magnet eddy current loss, as well as efficiency of a double stator permanent magnet machine having varying rotor pole numbers is estimated and presented in this study. This current investigation would be vital for electrical machine designers in quantifying the amount of losses in the various sections of a given double stator electric machine and as well provide better insight on resulting output efficiency of the machine. Time-stepping finite element analysis (TS-FEA) procedure is adopted in the calculations using ANSYS-MAXWELL simulation soft

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20

Lu, Y., K. Hoang, D. Noake, and N. Low. "Design and analysis of conical rotary compressor." IOP Conference Series: Materials Science and Engineering 1267, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1757-899x/1267/1/012001.

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Conical Rotary Compressor (CRC) is a screw type Positive Displacement Machine (PDM) consisting of one inner rotor rotating inside an outer rotor. The conical internal meshing rotors with the feature of variable pitch and rotor profile have an inherent capability to operation at high pressure ratio due to high built-in volume ratio and low leakage. CRC has potential to run in various applications such as Heating, Ventilation, and Air Conditioning (HVAC) system, vacuum pumps, and air compressors. The performance of the machine is heavily affected by rotor profile and rotor geometry. In this pape

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21

Domracheva, Yulia, and Sergey Loginov. "Simulation Technique of Synchronous Reluctance Bearingless Machine." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 8, 2015): 101. http://dx.doi.org/10.17770/etr2013vol2.845.

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Magnetically levitated rotor electric machines can be used under such conditions wherein application of conventional bearings is impossible because of presence of lubrication. Active magnetic bearings application requires rotor length increase and stalling speed is decreased. Bearingless electric machines are the next step up of the magnetically levitated rotor machines. A bearingless electric machine module generates electromagnetic torque and radial forces. This feature makes possible to decrease the rotor length on retention of capacity of torque and forces. It is necessary to verify a cont

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22

Taniguchi, H., K. Kudo, W. H. Giedt, I. Park, and S. Kumazawa. "Analytical and Experimental Investigation of Two-Phase Flow Screw Expanders for Power Generation." Journal of Engineering for Gas Turbines and Power 110, no. 4 (1988): 628–35. http://dx.doi.org/10.1115/1.3240182.

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An analytical procedure for calculating the performance of a two-phase flow screw-type expander is presented. Predicted results are compared with experimental measurements made with a recently developed prototype expander. This expander was designed for investigating the applicability of this type of machine as the expansion device in refrigeration or heat pump cycles with the objective of taking advantage of the power-producing capability of the expanding fluid. It has two rotors each with a diameter of 81.6 mm and a length of 135 mm, and was operated with Freon-12 entering at a pressure of 1

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23

Awah, Chukwuemeka Chijioke, and Ogbonnaya Inya Okoro. "Torque characteristics of double-stator permanent magnet synchronous machines." Archives of Electrical Engineering 66, no. 4 (2017): 815–28. http://dx.doi.org/10.1515/aee-2017-0062.

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Abstract The torque profile of a double-stator permanent magnet (PM) synchronous machine of 90 mm stator diameter having different rotor pole numbers as well as dual excitation is investigated in this paper. The analysis includes a comparative study of the machine’s torque and power-speed curves, static torque and inductance characteristics, losses and unbalanced magnetic force. The most promising flux-weakening potential is revealed in 13- and 7-rotor pole machines. Moreover, the machines having different rotor/stator (Nr/Ns) pole combinations of the form Nr = Ns ± 1 have balanced and symmetr

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24

Abdel-Khalik, A. S. "Five-Phase Modular External Rotor PM Machines with Different Rotor Poles: A Comparative Simulation Study." Modelling and Simulation in Engineering 2012 (2012): 1–14. http://dx.doi.org/10.1155/2012/487203.

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The performance of fault-tolerant modular permanent magnet machines depends on the proper selection of the pole and slot numbers which result in negligible coupling between phases. The preferred slot and pole number combinations eliminate the effect of low-order harmonics in the stator magnetomotive force and thereby the vibration and stray loss are reduced. In this paper, three external rotor machines with identical machine dimensions are designed with different slots per phase per pole ratios. A simulation study is carried out using finite element analysis to compare the performance of the t

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25

Guo, Liyan, and Huimin Wang. "Research on Stator Slot and Rotor Pole Combination and Pole Arc Coefficient in a Surface-Mounted Permanent Magnet Machine by the Finite Element Method." World Electric Vehicle Journal 12, no. 1 (2021): 26. http://dx.doi.org/10.3390/wevj12010026.

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A surface-mounted permanent magnet (SPM) machine is widely used in many auxiliary parts of an electric vehicle, so its design level directly influences the performance of the electric vehicle. In the design process of the SPM machine, selecting the appropriate stator slot and rotor pole combination and pole arc coefficient is a necessary and important step. Therefore, in this paper, a 750 W machine is set as an example to research stator slot and rotor pole combinations and pole arc coefficients for the SPM machine. First, the design schemes of machines adopting different stator slot and rotor

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26

Ahmedbacha, M. R., A. Benouar, A. Khorsi, N. Akermi, and K. Kaddouri. "Simulation of Tomographic Acquisition and Reconstruction Slice for Industrial Machine Rotor with Fixed-Angle Scanner." Materials Evaluation 80, no. 8 (2022): 38–44. http://dx.doi.org/10.32548/2022.me-04263.

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Rotating machines such as electric motors and pumps are the heart of any industrial production chain. Rotors are usually the most worn parts, and the preventive maintenance of these vital organs, although necessary, remains penalizing for the production line because the machines are stopped and disassembled for a lengthy period during the inspection phase. This paper suggests a simulation of optimized tomographic reconstruction by cone beam acquisition geometry to scan a functioning machine rotor with high X-ray energy. In this work we propose a simple design of a fixed-angle projection scanne

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27

Islam, Ziaul, Faisal Khan, Basharat Ullah, Ahmad H. Milyani, and Abdullah Ahmed Azhari. "Design and Analysis of Three Phase Axial Flux Permanent Magnet Machine with Different PM Shapes for Electric Vehicles." Energies 15, no. 20 (2022): 7533. http://dx.doi.org/10.3390/en15207533.

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Axial flux permanent magnet (AFPM) machines are good candidates for electric vehicle applications due to their high torque density, improved efficiency, and better flux distribution; thus, they are often used. A dual-rotor single-stator AFPM machine with four differently shaped permanent magnet (PM) rotors is investigated. The main aim of this paper is to enhance the average torque while minimizing the cogging torque and torque ripples at the expense of low PM volume. The proposed machines are analyzed in terms of flux linkage, back-EMF, cogging torque, average torque, and torque ripples. The

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Ahmed, Sheeraz, Qasim Ali, Ghulam Jawad Sirewal, Kapeel Kumar, and Gilsu Choi. "Hybrid Brushless Wound-Rotor Synchronous Machine with Dual-Mode Operation for Washing Machine Applications." Machines 13, no. 5 (2025): 342. https://doi.org/10.3390/machines13050342.

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This paper proposes a hybrid brushless wound-rotor synchronous machine (HB-WRSM) with an outer rotor topology that can operate as a permanent magnet synchronous machine (PMSM), as well as an HB-WRSM. In the first part, the existing brushless wound-rotor synchronous machine (BL-WRSM) is modified into a hybrid model by introducing permanent magnets (PMs) in the rotor pole faces to improve the magnetic field strength and other performance variables of the machine. In the second part, a centrifugal switch is introduced, which can change the machine operation from HB-WRSM to PMSM. The proposed mach

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29

Antal, Eugen, and Viliam Hromada. "A NEW STREAM CIPHER BASED ON FIALKA M-125." Tatra Mountains Mathematical Publications 57, no. 1 (2013): 101–18. http://dx.doi.org/10.2478/tmmp-2013-0038.

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ABSTRACT In 2010, a new cipher Hummingbird by [Engels, D.-Fan, X.- -Gong, G.-Hu, H.-Smith, E. M. Hummingbird: Ultra-Lightweight Cryptography for Resource-Constrained Devices, in: 1st International Workshop on Lightweight Cryptography for Resource-Constrained Devices. Tenerife, Canary Islands, Spain, January 2010] was proposed. It is a combination of both block and stream cipher and its design was inspired and motivated by the Enigma machine. The encryption process of the cipher can be considered as a continuous running of a rotor-cipher. Four block ciphers play the role of the rotors that appl

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30

Shuraiji, Ahlam Luaibi. "The effect of static and dynamic eccentricities on the performance of flux reversal permanent magnet machine." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (2020): 634. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp634-640.

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This study investigates the effect of static and dynamic eccentricities on the performances of flux reversal permanent magnet (FRPM) machine with even rotor pole number, i.e. FRPM machine with 12/10 stator/rotor combination. No-load and load performances of the machine are investigated under three rotor operating conditions including centricity, static eccentricity and dynamic eccentricity. The investigation has been carried out using 2D-FEA. It has been revealed that the 12/10 FRPM machine under normal operating condition has no unbalanced magnetic force, due to the even pole number of the ro

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Ahlam, Luaibi Shuraiji. "The effect of static and dynamic eccentricities on the performance of flux reversal permanent magnet machine." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 2 (2020): 634–40. https://doi.org/10.11591/ijpeds.v11.i2.pp634-640.

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This study investigates the effect of static and dynamic eccentricities on the performances of flux reversal permanent magnet (FRPM) machine with even rotor pole number, i.e. FRPM machine with 12/10 stator/rotor combination. No-load and load performances of the machine are investigated under three rotor operating conditions including centricity, static eccentricity and dynamic eccentricity. The investigation has been carried out using 2D-FEA. It has been revealed that the 12/10 FRPM machine under normal operating condition has no unbalanced magnetic force, due to the even pole number of the ro

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32

Kim, Jang, Chung, and Hwang. "A New Outer-Rotor Hybrid-Excited Flux-Switching Machine Employing the HTS Homopolar Topology." Energies 12, no. 14 (2019): 2654. http://dx.doi.org/10.3390/en12142654.

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Currently, studies of flux switching machines are actively underway owing to several advantages of these machines, including their sturdy rotor structure and high output capability. This paper deals with an outer-rotor hybrid-excited flux-switching machine (FSM). The proposed machine embraces a homopolar structure and utilizes permanent magnets (PMs) for field excitation and a high-temperature superconducting (HTS) coil for flux regulation. The stator houses the HTS field coil, PMs, and armature windings. The outer rotor consists solely of an iron core. Thus, the machines are cost effective an

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33

Mbadiwe I, Enwelum, and Erwan Sulaiman. "Flux Switching Permanent Magnet Motor using Segmented Outer Rotor Structure for Electric Scooter." Indonesian Journal of Electrical Engineering and Computer Science 6, no. 2 (2017): 379. http://dx.doi.org/10.11591/ijeecs.v6.i2.pp379-386.

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Flux switching motor is a type of electric machine that locates both flux source and armature windings on the stator leaving its rotor a simple piece of iron. This machine was developed by combining the toothed stator structure of induction machine and the toothed rotor structure of switched reluctance machine together. Furthermore, it has three types of flux sources which include permanent magnet. Conventionally, the toothed kind of rotor has dominated machines rotor design and has been known for high manufacturing cost and iron loss, resulting to low performance. This calls for worry and the

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Yu, Wenfei, Zhongze Wu, and Wei Hua. "Performance Evaluation of Stator/Rotor-PM Flux-Switching Machines and Interior Rotor-PM Machine for Hybrid Electric Vehicles." World Electric Vehicle Journal 14, no. 6 (2023): 139. http://dx.doi.org/10.3390/wevj14060139.

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A three-phase interior permanent magnet (IPM) machine with 18-stator-slots/12-rotor-poles and concentrated armature winding is commercially employed as a 10 kW integrated-starter-generator in a commercial hybrid electric vehicle. For comprehensive and fair evaluation, a pair of flux-switching permanent magnet (FSPM) brushless machines, namely one stator permanent magnet flux-switching (SPM-FS) machine, and one rotor permanent magnet flux-switching (RPM-FS) machine, are designed and compared under the same DC-link voltage and armature current density. Firstly, a SPM-FS machine is designed and c

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35

Ur Rahman, Lutf, Faisal Khan, Muhammad Afzal Khan, et al. "Modular Rotor Single Phase Field Excited Flux Switching Machine with Non-Overlapped Windings." Energies 12, no. 8 (2019): 1576. http://dx.doi.org/10.3390/en12081576.

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This paper aims to propose and compare three new structures of single-phase field excited flux switching machine for pedestal fan application. Conventional six-slot/three-pole salient rotor design has better performance in terms of torque, whilst also having a higher back-EMF and unbalanced electromagnetic forces. Due to the alignment position of the rotor pole with stator teeth, the salient rotor design could not generate torque (called dead zone torque). A new structure having sub-part rotor design has the capability to eliminate dead zone torque. Both the conventional eight-slot/four-pole s

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Zhang, Fengyu, David Gerada, Zeyuan Xu, et al. "Performance Entitlement by Using Novel High Strength Electrical Steels and Copper Alloys for High-Speed Laminated Rotor Induction Machines." Electronics 11, no. 2 (2022): 210. http://dx.doi.org/10.3390/electronics11020210.

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The laminated rotor Induction Machine (IM), with its simple construction and manufacturing, robustness, ease of control and comparatively lower cost remains by far the most utilized electromechanical energy converter. At very high speeds, traditionally its use is considered to be limited to the previously established operational limits of 2.5 × 105 rpm√kW, beyond which the surface Permanent Magnet (PM) Machine and the solid rotor Induction Machine become the machines available for consideration. The aforesaid limits are derived from the use of classic materials. This paper reviews the recent d

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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 f

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Thanh, Ngo Van. "COMPARISON BEHAVIOR OF A LARGE TURBO MACHINE VIBRATION BETWEEN UNBALANCE AND BENT SHAFT." Vietnam Journal of Science and Technology 54, no. 2 (2016): 266. http://dx.doi.org/10.15625/0866-708x/54/2/6164.

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In recently, large capacity steam turbines have come into wider use and have been designed to ever higher performance specifications. As we all know, it’s hard to maintain the concentricity of a rotor-bearing system during operating, especially for multi-rotors within specified level of vibration. Rotor vibration could be caused by many reason, mass unbalance and bent shaft are amongst almost frequently occurring. Mass unbalance and bent shaft both give to force excitation at a frequency corresponding to once per revolution. Taking a LP B rotor of a 1000MW USC steam turbine as an example, this

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Tran, Van The, Thanh Long Le, and Hong Lanh Nguyen. "Force Analysis for a Variable-Pitch Rotor Meshing Pair in Twin-Screw Vacuum Pump Generating on CNC Turning Machine." Applied Mechanics and Materials 894 (September 2019): 41–50. http://dx.doi.org/10.4028/www.scientific.net/amm.894.41.

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The variable pitch twin-screw vacuum pump has more advantage than the uniform pitch twin-screw vacuum pump. Its energy efficiency and volumetric compression ratio are specifically high. Under the cyclic gas pressure and working temperature, the rotors of vacuum pump often deform and interfere that lead to noise, vibration and rotor abrasion. In this paper, a 3D model of the variable pitch rotor generating by CNC turning process is constructed to reasonably estimate the rotor load and deformation in operation. The contact force have been analyzed to show the advantages of variable pitch rotors.

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Shevchenko, S. S. "Mathematical modeling of centrifugal machines rotors seals for the purpose of assessing their influence on dynamic characteristics." Mathematical Modeling and Computing 8, no. 3 (2021): 422–31. http://dx.doi.org/10.23939/mmc2021.03.422.

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With an increase of equipment parameters, such as the pressure of the sealing medium and the speed of shaft rotation, the problems ensuring its hermetization efficiency are rising up. In addition to hermetization itself, the sealing system affect the overall operational safety of the equipment, especially vibratory. Groove seals are considered as hydrostatodynamic supports capable of effectively damping rotor oscillations. To determine the dynamic characteristics, models of grooved seals and single-disc rotors with grooved seals are examined. The obtained analytical dependences for computation

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Pang, Bin, Guiji Tang, Chong Zhou, and Tian Tian. "Rotor Fault Diagnosis Based on Characteristic Frequency Band Energy Entropy and Support Vector Machine." Entropy 20, no. 12 (2018): 932. http://dx.doi.org/10.3390/e20120932.

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Rotor is a widely used and easily defected mechanical component. Thus, it is significant to develop effective techniques for rotor fault diagnosis. Fault signature extraction and state classification of the extracted signatures are two key steps for diagnosing rotor faults. To complete the accurate recognition of rotor states, a novel evaluation index named characteristic frequency band energy entropy (CFBEE) was proposed to extract the defective features of rotors, and support vector machine (SVM) was employed to automatically identify the rotor fault types. Specifically, the raw vibration si

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Bielawski, Piotr Jan. "Diagnosing the Machine Set Rotor Using Its Relative Vibrations." Applied Sciences 12, no. 11 (2022): 5660. http://dx.doi.org/10.3390/app12115660.

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The efficiency and dependability of machine set depends on the quality of maintenance of functional units of the machine set rotor. Diagnosing the functional units of the machine set can significantly increase the effectiveness and efficiency of the maintenance of the machine set. The purpose of the study was to substantiate the separation of the machine set rotor and demonstrate the possibility of diagnosing such a functional unit using non-contact measurements of its relative vibrations. The measure of the wear margin of the machine set rotor was analyzed, and the symptoms of this measure we

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Wu, D., Z. Q. Zhu, and X. Liu. "Design of external rotor switched flux memory machine with hybrid magnets." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 507–24. http://dx.doi.org/10.1108/compel-03-2015-0132.

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Purpose – The purpose of this paper is to propose the design concepts of external rotor switched flux hybrid magnet memory machine (SFHMMM) to further increase the torque capability while keeping the merits of internal rotor SFHMMM, such as adjustable back-EMF, and good flux weakening performance, etc. Design/methodology/approach – The torque enhancing principle of external rotor SFHMMM, and the design considerations such as feasible stator and rotor pole numbers (Ns/Nr ) are discussed by equations. Then, the performances such as back-EMF, dq-axis inductances, torque and flux weakening perform

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Ran, Zhitong, Zi-Qiang Zhu, and Dawei Liang. "Comparative Study of Dual-Rotor Permanent Magnet Machines with Series and Parallel Magnetic Circuits." World Electric Vehicle Journal 16, no. 1 (2024): 12. https://doi.org/10.3390/wevj16010012.

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This paper compares the electromagnetic performances of radial-flux, dual-rotor, permanent magnet (DRPM) machines with series (S) and parallel (P) magnetic circuits for two rotors, i.e., SDRPM and PDRPM, accounting for different slot/pole number combinations, stator winding configurations, and machine sizes. The machines are optimized using the finite element analysis (FEA) based on the genetic algorithm. It shows that the PDRPM machine with the tooth coil (TC) configuration has the highest permanent magnet (PM) utilisation compared to the PDRPM with toroidal winding (TW) configuration and the

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Badria, Amara, Hemsas Kamel Eddine, and Mellah Hacene. "Simulation of the thermal behavior of an asynchronous motor with various types of rotors." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 2 (2024): e11184. https://doi.org/10.54021/seesv5n2-579.

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This paper presents a thermal analysis of an asynchronous motor to identify the components most sensitive to temperature increases, both in transient and steady-state conditions. Overheating in electrical machines is a critical issue in industry, leading to significant damage. Due to its serious consequences, this study provides a comprehensive thermal analysis of an asynchronous motor. A thermal network model is established to examine the motor's thermal behavior. The analysis is conducted on an asynchronous motor with four rotor types: a squirrel-cage rotor and three solid rotors (smooth, wi

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Gannon, Anthony J., and Garth V. Hobson. "Performance Testing on Transonic Rotors." Mechanical Engineering 132, no. 08 (2010): 52–53. http://dx.doi.org/10.1115/1.2010-aug-8.

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This article discusses the performance testing of transonic rotors at the Turbopropulsion Laboratory at the Naval Postgraduate School. The Mach number is one of the most important parameters in the case of high-speed compressors. In order to limit power consumption in a test machine, the simplest change is to scale down the machine. A second concept to reduce the power consumption of the machine once it has been scaled down is to throttle the flow before the rotor rather than after it. As a high-speed rotor compresses the incoming air by around 1.4–1.6 times, the air leaving it is appreciably

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Hussain, Md Shahwaz, and Sujata Pouranik. "Optimized Thermal Efficiency of Rotor and Stator Using CFD." SMART MOVES JOURNAL IJOSCIENCE 6, no. 6 (2020): 29–37. http://dx.doi.org/10.24113/ijoscience.v6i6.292.

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The space between rotor and stator plays a very important role in the design and performance of rotating machinery. The thickness of the gap can vary considerably depending on the size and operating conditions for the different types of rotating machines. Analysis the air velocity and temperature distribution over the air flow gap in stator and motor. Changing the design of rotor to develop turbulence in air flow gap. Compare the velocity and temperature distribution of proposed design with previous studies. The simulation results pinpoint also the periodic heat transfer pattern from the rotor

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Brkovic, Bogdan, and Milos Jecmenica. "Calculation of Rotor Harmonic Losses in Multiphase Induction Machines." Machines 10, no. 5 (2022): 401. http://dx.doi.org/10.3390/machines10050401.

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The topic of this paper is the determination of rotor harmonic losses in multiphase machines. Specifically, harmonic losses occur in the rotor winding and core due to higher-order spatial harmonics of the flux density. This phenomenon influences machine parameters and overall performance and increases temperature rise in parts of the rotor. The flux density distribution is determined by the stator magnetomotive force harmonic content, which is directly related to the winding distribution. A cage-rotor asymmetrical six-phase induction machine is selected for this case study. An analysis of diff

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Zuo, Zijie, Yidong Du, and Lei Yu. "Influence of Stator/Rotor Torque Ratio on Torque Performance in External-Rotor Dual-Armature Flux-Switching PM Machines." Machines 12, no. 9 (2024): 588. http://dx.doi.org/10.3390/machines12090588.

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External-rotor dual-armature flux-switching PM (ER-DA-FSPM) machines have high torque density and decent fault tolerance, making them promising candidates for in-wheel machine applications in electric vehicles. The torque output and optimal design parameters of ER-DA-FSPM machines are affected by the stator/rotor torque ratio, which is the focus of this paper. Firstly, this paper analyzes airgap flux density harmonics of ER-DA-FSPM to provide a clear insight into the torque-generation mechanism. Then, this paper investigates the influence of torque ratio on average torque under the same copper

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Ahlam, Luaibi Shuraiji, and M. J. Al-ani M. "Design and optimization of HTS flux-switching permanent magnet machine." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 4 (2019): 1751–57. https://doi.org/10.11591/ijpeds.v10.i4.pp1751-1757.

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Flux-switching permanent magnet (FSPM) machine with high temperature superconductors (HTS) bulks located between the rotor poles to eliminate the flux leakage in the rotor, termed as (HTS-FSPM) machine has been proposed in this paper. Using genetic algorithm, the HTS and the conventional FSPM machines having the same size constraints and load conditions have been globally optimized for max aveage torque. To highlight the advantages of the HTS-FSPM machine, a performance comparison between the conventional and HTS-FSPM machines has been presented. It is found that the HTSFSPM machine can increa

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