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Статті в журналах з теми "Axial induction motor"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Solomin, Vladimir A., Andrej V. Solomin, Larisa L. Zamshina, and Nadejda A. Trubitsina. "Determination of the axial force of a cylindrical linear induction motor with rotational-translational movement of the secondary element." Modern Transportation Systems and Technologies 8, no. 1 (January 15, 2022): 50–66. http://dx.doi.org/10.17816/transsyst20228150-66.

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Анотація:

Background: the variety of modern electric drives requires the creation of new types of electric motors with enhanced functionality. Cylindrical linear induction motors with rotational-translational movement of secondary elements also belong to such electric machines. Aim: development of a cylindrical linear induction motor with rotational-translational movement of the secondary element. Materials and methods: the use of a discrete inductor system for the implementation of the rotational-translational movement of the secondary element, the analytical solution of the field problem. Results: new design of a cylindrical linear induction motor with rotational-translational movement of the secondary element, the ratio for determining the axial force of the motor. Conclusion: the proposed design of a cylindrical linear induction motor has extended functionality due to the simultaneous implementation of the rotational-translational movement of the secondary element.

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2

Keskin Arabul, Fatma, Ibrahim Senol, and Yasemin Oner. "Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor." Energies 13, no. 19 (September 23, 2020): 4991. http://dx.doi.org/10.3390/en13194991.

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In recent years, with developing technology in the field of electrical machines, more efficient and high power density electric motors have been produced. The use of high energy efficiency motors gains importance due to the increase in global energy demand. The main purpose of this study was to design an Axial Flux Induction Motor (AFIM) with the same efficiency class as the Radial Flux Induction Motor (RFIM) in premium efficiency (IE3) class which is used commonly in industrial applications. Various AFIMs are designed with different rotor slot numbers and performance analyses as efficiency and torque ripple changes are investigated. It is known that torque ripple is one of the key parameters in electrical machine design which should be kept as low as possible without decreasing efficiency and torque. Accordingly, AFIMs’ rotor slots are skewed considering the stator and rotor slot numbers. The use of a Soft Magnetic Composites (SMC) material in design is also investigated. As a result of the analyses, many premium efficiency classes for AFIMs are obtained. In addition, using SMC material and skewing the rotor slots provides that torque ripples be reduced.

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3

Karlov, O., I. Kondratenko, R. Kryshchuk, and A. Raschepkin. "AXIAL MAGNETIC FORCES OF THE AXIAL ARC-STATOR INDUCTION MOTOR WITH DISC BIMETALLIC ROTOR." Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini 2018, no. 50 (July 18, 2018): 71–78. http://dx.doi.org/10.15407/publishing2018.50.071.

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4

Álvarez, A., P. Suárez, D. Cáceres, X. Granados, B. Pérez, and J. M. Ceballos. "Disk-shaped superconducting rotor for an axial flux induction motor." Physica C: Superconductivity 398, no. 3-4 (November 2003): 157–60. http://dx.doi.org/10.1016/s0921-4534(03)01291-7.

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5

Li, S., Y. Fan, J. Fang, W. Qin, G. Lv, and J. H. Li. "HTS axial flux induction motor with analytic and FEA modeling." Physica C: Superconductivity 494 (November 2013): 230–34. http://dx.doi.org/10.1016/j.physc.2013.04.021.

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6

Benoudjit, A. Guettafi, N. Nait SaÏ, A. "Axial Flux Induction Motor for On-Wheel Drive Propulsion System." Electric Machines & Power Systems 28, no. 12 (December 2000): 1107–25. http://dx.doi.org/10.1080/073135600449017.

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7

Et. al., V. Ramesh Babu,. "Reconfiguration of Propulsion System Topology Using Axial Flux Machines in Electric Vehicles." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (April 10, 2021): 802–9. http://dx.doi.org/10.17762/turcomat.v12i2.1088.

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Анотація:

In this paper, an effort is made to reduce the size, weight and cost of Electric Vehicles (EVs) with the reconfiguration of propulsion motor topology. The new machine topology has been advantageously used to replace the conventional motors. A Twin Rotor Axial Flux Induction Machine (TRAFIM) having higher power densities, shorter axial lengths than classical Radial Flux Machines have been implemented in this work. This further reduces the other complexities associated with the mechanical differential which is indented to provide different speeds to two wheels in necessary conditions. The performance of EV has been remarkably improved with the proposed reconfiguration. This paper presents a comprehensive analysis of an EV with the adoption of Twin Rotor Axial Flux Induction Machine (TRAFIM).

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8

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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Анотація:

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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9

Petryna, Janusz. "How the axial flux of an induction motor can be used?" Science, Technology and Innovation 5, no. 2 (June 30, 2019): 34–43. http://dx.doi.org/10.5604/01.3001.0013.2874.

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Анотація:

The article contains the results of research within the project to apply unipolar (axial) flux to obtain diagnostic signals carrying the information of: electrical asymmetries of machinery (inter-turn stator short-circuits, cage damages); rotational speed of the rotor and load torque. Inter-turn stator short-circuits can be detected both at starting process time (when they appear most often), as well as in steady states. Detection of rotor cage defects in steady states has a character of a comparative study, and over time, as the defects develop. For standard drives that are powered from the network and work in open systems, by measuring the voltage following a unipolar flux, it is possible to make measurement and recording of motor speed, which usually is almost never provided under industrial conditions. The study shows that a simple in its construction, cheap coil can be a very useful diagnostic tool. The measurements were carried out at the laboratory and motor workplace in the power plant, while in the test station, during the loading, characteristics illustrating the dependence of the torque on the axial flux and on the rotational speed were obtained. A way of using a single measurement to estimate the torque has been proposed. The method is relatively simple to implement and allows for a fully non-invasive determination of the load torque.

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10

UENO, Satoshi, and Yohji OKADA. "Vector Control of an Induction Type Axial Gap Combined Motor-Bearing." Transactions of the Japan Society of Mechanical Engineers Series C 66, no. 641 (2000): 131–37. http://dx.doi.org/10.1299/kikaic.66.131.

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11

Kryshchuk, R. S., S. I. Gavryluk, and A. A. Tsugankova. "ENERGY INDICATORS OF AXIAL INDUCTION DISK-SHAPED MOTOR FOR SHIP RADARS." Tekhnichna Elektrodynamika 2021, no. 5 (August 16, 2021): 38–48. http://dx.doi.org/10.15407/techned2021.05.038.

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Анотація:

The development of a reliable gearless electric drive for antennas of ship radars is an important problem. To solve the problem, this article proposes to use an axial induction motor (AIM) with a massive bimetallic disk-shaped rotor. The AIM model is presented, which consists of three computational domains with the boundary condition of symmetry. To calculate the electromagnetic field, a well-known analytical method of integral transformations is used taking into account the variable along the radial coordinate of the linear speed of the rotor. Ready-to-use expressions are presented for the development of a program for the numerical calculation of the magnetic field and energy characteristics of the motor. Algorithm is developed for calculating the dimensions of the AIM, operating at different speeds with a frequency converter. The numerical calculation program is used to calculate the dimensions AIM. It uses well-known recommendations for the parameters of the electromagnetic field in the magnetic core and in the air gap. The calculation of the dimensions of the AIM for ship radars “Mius” is performed. The dependence of the efficiency on the current frequency for different rotor’s frequencies is investigated. The energy indicators of the AIM are investigated at a variable torque on the shaft and at different rotor speeds. The parameters of the power source for the AIM of ship radars are established. References 20, figures 5, tables 3.

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12

Baranov, Georgii, Alexander Zolotarev, Valerii Ostrovskii, Timur Karimov, and Alexander Voznesensky. "Analytical Model for the Design of Axial Flux Induction Motors with Maximum Torque Density." World Electric Vehicle Journal 12, no. 1 (February 11, 2021): 24. http://dx.doi.org/10.3390/wevj12010024.

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Анотація:

This article proposes a mathematical model of an axial flux induction motor (AFIM) with one stator and one rotor. The model is based on the expression for the electromagnetic torque, which presents a function of two independent variables: the axial length of the stator core and the flux density in the air gap. This allows calculating the main dimensions of the motor with the highest possible torque density. Thus, developed model is suitable for designing the motor of specified volume with maximum torque, and solving the inverse problem of minimizing the machine volume with the specified torque. The detailed output of the model and the results of the calculations for the low-power engine powered by voltage of 7.35 V (RMS) are given. The results are validated using FEM in ANSYS software: with the outer motor diameter of 0.11 m, the flux density in it reaches 1.2 T.

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13

Daif, Omar S., M. Helmy Abd El-Raouf, Mohamed Adel Esmaeel, and Abd Elsamie B. Kotb. "Economic design of sleeve rotor induction motor using rotor ends." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 2 (April 1, 2022): 1233. http://dx.doi.org/10.11591/ijece.v12i2.pp1233-1242.

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Анотація:

<span>In this paper, the field analysis of the sleeve rotor induction motor (IM) is carried out taking the rotor ends into consideration. Here, the field system equations are derived using the cylindrical model with applying Maxwell's field equations. It is expected that, both starting and maximum torques will increase with taking the rotor ends than that without rotor ends. A simple model is used to establish the geometry of the rotor ends current density and to investigate the air gap flux density. The magnetic flux is assumed to remain radially constant through the very small air gap length between the sleeve and stator surfaces. Variation of the field in the radial direction is ignored and the skin effect in the axial direction is considered. The axial distributions of the air gap flux density, the sleeve current density components and the force density have been determined. The motor performance is carried out taking into account the effects of the rotor ends on the starting and normal operations. The sleeve rotor resistance and leakage reactance have been obtained in terms of the cylindrical geometry of the machine. These equivalent circuit parameters have been calculated and plotted as functions of the motor speed with and without the rotor ends.</span>

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14

Nurmalia, Alif, Widyono Hadi, and Widya Cahyadi. "Performance Test of Three-Phase Brushless Direct Current Motor Axial Flux with Differences Diameter of Neodymium Type Permanent Magnet." ELKHA 13, no. 1 (April 20, 2021): 55. http://dx.doi.org/10.26418/elkha.v13i1.41693.

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Анотація:

Technology that is growing rapidly and innovations that have sprung up in the electrical field today are driving the use of electricity as a source of energy to do work. Electric motor is one component that is very popular in the industrial world and households that are useful to human life. In addition to DC motors and induction motors, there are also 3 phase brushless direct current (BLDC) motors which are a type of synchronous motor where magnetic fields are produced by rotor and stator at the same frequency. The rotor is a moving part of the brushless direct current motor which is a place of permanent magnet called a pole. This paper discusses the performance of brushless direct current 3 phase axial flux motors with different diameters of neodymium type permanent magnets. Tests carried out using neodymium permanent magnets with diameters of 15mm x 2mm and 20mm x 2mm were tested without using a load and using load. The parameters used in testing motor performance include speed, torque, and motor power with a source voltage of 12V, 16V, 20V, and 24V. The test results shows that the speed value of a BLDC motor using permanent magnets with a size of 20mm x 2mm is greater than that of permanent magnets of 15mm x 2mm. The same thing applies to the value of the power produced while, for the value of torque when the motor uses a permanent magnet of 15mm x 2mm will be greater than that of a motor using a permanent magnet of 20mm x 2mm.

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15

Álvarez, A., P. Suárez, D. Cáceres, X. Granados, X. Obradors, R. Bosch, E. Cordero, B. Pérez, A. Caballero, and J. A. Blanco. "Superconducting armature for induction motor of axial flux based on YBCO bulks." Physica C: Superconductivity 372-376 (August 2002): 1517–19. http://dx.doi.org/10.1016/s0921-4534(02)01070-5.

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16

Mei, Jie, Yuefei Zuo, Christopher H. T. Lee, and James L. Kirtley. "Modeling and Optimizing Method for Axial Flux Induction Motor of Electric Vehicles." IEEE Transactions on Vehicular Technology 69, no. 11 (November 2020): 12822–31. http://dx.doi.org/10.1109/tvt.2020.3030280.

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17

Zhang, Chi, King Jet Tseng, and Guangzhou Zhao. "Comparison of axial flux PM synchronous motor and induction motor by mathematical and finite element analysis." International Journal of Applied Electromagnetics and Mechanics 37, no. 4 (November 22, 2011): 263–73. http://dx.doi.org/10.3233/jae-2011-1399.

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18

JUNG, KWANG SUK, and SANG HEON LEE. "INTEGRATED DRIVE FOR CONTACT-FREE FULL ROTATION AND ITS NOVEL POSITIONING METHODOLOGY." International Journal of Modern Physics B 22, no. 09n11 (April 30, 2008): 1871–76. http://dx.doi.org/10.1142/s0217979208047559.

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Анотація:

To expand an inevitably limited rotating range of the existing planar precision stage, we suggest a revolving stage driven by three-separate axial type of transverse flux induction motors spaced 120° apart. It is a non-contact integrated rotating system that uses three-axial vector forces such as normal and thrust force of each motor. In this paper, the primary principles capable of realizing such a contact-less revolving stage are reviewed and compared, with results that seem to confirm the main principles of the suggested system. And then, the positioning method with only the air-gap measurements covering full degree of freedom is presented, compared with that of existing stages.

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19

Spasic, Zivan, Milan Radic, and Dragana Dimitrijevic. "Temperature rise in induction motor windings as the cause of variation in rotational speed of an axial fan." Thermal Science 20, suppl. 5 (2016): 1449–59. http://dx.doi.org/10.2298/tsci16s5449s.

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The paper presents results of an experimental investigation performed under controlled laboratory conditions, in order to identify real causes of variation in the rotational speed of an axial fan that can be noticed after a certain period following the start of operation. The theoretical background important for understanding the observed phenomenon is given and the hypothesis is proposed which states that the temperature rise in motor windings and a consequential rise of their resistances are responsible for such specific behavior of the axial fan. The experiment was performed on a standard test rig with a small industrial axial fan, driven by a three-phase induction motor with the rated power of 1.5 kW. The experimental procedure is described in details, measured and calculated results are presented and appropriate conclusions are given. The obtained experimental results confirm the proposed hypothesis.

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20

Klimenta, Dardan, and Antti Hannukainen. "An approximate estimation of velocity profiles and turbulence factor models for air-flows along the exterior of TEFC induction motors." Thermal Science 21, no. 3 (2017): 1515–27. http://dx.doi.org/10.2298/tsci150626090k.

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Compared to a number of other existing correlations for heat transfer, the empirical correlations for forced convection from a short horizontal cylinder in axial air-flows usually do not involve the effects of changes in air-flow velocity and/or air-flow turbulence. Therefore, a common analysis of the heat transfer by using only one energy balance equation for entire outer surface of a solid is considered insufficient for induction motor applications because it fails to include aforementioned effects. This paper presents a novel, empirically-based methodology to estimate approximately the values of air-flow velocities and turbulence factors, that is, velocity profiles and turbulence factor models for stationary horizontal cylinders with and without fins (frame and two end-shields) in axial air-flows. These velocity profiles and turbulence factor models can then be used in analytical modelling of steady-state heat transfer from the exterior of totally enclosed fan-cooled induction motors.

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21

Mei, Jie, Christopher H. T. Lee, and James L. Kirtley. "Design of Axial Flux Induction Motor With Reduced Back Iron for Electric Vehicles." IEEE Transactions on Vehicular Technology 69, no. 1 (January 2020): 293–301. http://dx.doi.org/10.1109/tvt.2019.2954084.

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22

Alberti, Luigi, Nicola Bianchi, Aldo Boglietti, and Andrea Cavagnino. "Core Axial Lengthening as Effective Solution to Improve the Induction Motor Efficiency Classes." IEEE Transactions on Industry Applications 50, no. 1 (January 2014): 218–25. http://dx.doi.org/10.1109/tia.2013.2266632.

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23

WOLNIK, Tomasz. "Axial forces of magnetic pull in a disc type induction motor – experimental test." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 11 (November 5, 2019): 129–34. http://dx.doi.org/10.15199/48.2019.11.34.

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24

Feng, Haichao, Jikai Si, Wei Wu, Lianghui Dong, and Zhiping Cheng. "Equivalent Circuit Parameter Calculations and Characteristics Analysis of 2-DoF Direct Drive Induction Motor with a Slotted Solid Rotor." Applied Sciences 9, no. 11 (May 29, 2019): 2191. http://dx.doi.org/10.3390/app9112191.

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In this paper, a modified equivalent circuit model (ECM), which considers the effects of an arc-shaped stator structure and saturation, is presented to calculate the characteristics of a two-degree-of-freedom direct drive induction motor (2DoFDDIM). The motor has a novel slotted solid rotor (SSR), which is slotted along the axial and circumferential directions, and copper is cast in the slots. The SSR is equivalent to a cage rotor by analyzing the current distribution using the circuit diagram. The corrected ECM parameter expressions of a cage rotor are proposed to calculate the SSR parameters. The characteristics obtained by ECM and finite element method are compared to verify the accuracy of the modified ECM. This paper provides reference for calculating the parameters of the induction motor with SSR.

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25

Yang, Chanseung, Tae-June Kang, Doosoo Hyun, Sang Bin Lee, Jose A. Antonino-Daviu, and Joan Pons-Llinares. "Reliable Detection of Induction Motor Rotor Faults Under the Rotor Axial Air Duct Influence." IEEE Transactions on Industry Applications 50, no. 4 (July 2014): 2493–502. http://dx.doi.org/10.1109/tia.2013.2297448.

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26

Nasiri-Gheidari, Zahra, and Hamid Lesani. "Theoretical modeling of axial flux squirrel cage induction motor considering both saturation and anisotropy." International Transactions on Electrical Energy Systems 24, no. 3 (September 25, 2012): 335–46. http://dx.doi.org/10.1002/etep.1691.

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27

van Rensburg, C. J., M. P. Venter, and D. N. J. Els. "Experimental Testing on an Air-Cooled Condenser Motor, Gearbox and Fan." MATEC Web of Conferences 347 (2021): 00022. http://dx.doi.org/10.1051/matecconf/202134700022.

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Анотація:

The majority of South Africa’s electricity is generated from coal-fired power stations. After expansion through the turbine stage the heated steam is condensed by air-cooled condensors (ACCs). In water scarce areas air-cooled condensers are used to reject heat by means of convection through an array of fans that force air over the heated steam tubes positioned in a A-frame structure above the fan. The ACC system consists of an induction motor, two-stage gear reducer and an axial fan. For this research, the rotational velocity of the gearbox’s output shaft is measured as well as the bending and torsional strain experienced during different stages of operation. A proximity sensor and various sets of strain gauges are used to record the measurements respectively. Testing was conducted at three different sites that utilize different control methods for the induction motors. The purpose of testing at different sites was to evaluate the effectiveness of each start-up control system and its application inside an ACC. The results obtained in each of the three cases are quite clear that any motor controller is beneficial to the overall system simply due to the reduced inrush current and torque peaks.

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28

Huang, Pinglin, Hang Li, and Chen Yang. "A Yokeless Axial Flux Induction Motor for Electric Vehicles Based on Grain-oriented Silicon Steel." Journal of Physics: Conference Series 1815, no. 1 (February 1, 2021): 012042. http://dx.doi.org/10.1088/1742-6596/1815/1/012042.

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29

Park, Yu-Seop. "Investigation on Connected System of Axial-Flux Permanent Magnet Synchronous Generator and Linear Induction Motor." IEEE Canadian Journal of Electrical and Computer Engineering 45, no. 1 (2022): 18–23. http://dx.doi.org/10.1109/icjece.2021.3123063.

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30

Atabiq, Fauzun, Budiana Budiana, Arif Febriansyah Juwito, Irfan Syahri, and Ihsan Saputra. "MODIFICATION OF TWO POLES SINGLE PHASE INDUCTION MOTOR AS WIND PICO GENERATOR." JURNAL INTEGRASI 11, no. 1 (April 1, 2019): 68–73. http://dx.doi.org/10.30871/ji.v11i2.1132.

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Анотація:

As an alternative energy, the potential of wind power in Indonesia is quite high. Some of the constraints of wind power include the presence of intermittent winds, the average wind speed in the Indonesian is relatively low, or only certain areas that have moderate to high wind speeds, so that winds that are not too tight can cause the turbines not spinning. This study is about modifying a two pole single phase induction motor as a wind pico generator. Modifications made to the squirrel cage rotor induction motor become two poles axial flux permanent magnet rotors. The test results show that a two pole pico generator is not suitable to be applied to wind power units. Electric power produced by high-speed prime mover, above 1000 rpm only 2.53 Watts. Whereas when it is operated at low speed, less than 200 rpm, the maximum output power power only 44 mW.

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31

Skowron, Maciej, Marcin Wolkiewicz, Teresa Orlowska-Kowalska, and Czeslaw T. Kowalski. "Effectiveness of Selected Neural Network Structures Based on Axial Flux Analysis in Stator and Rotor Winding Incipient Fault Detection of Inverter-fed Induction Motors." Energies 12, no. 12 (June 21, 2019): 2392. http://dx.doi.org/10.3390/en12122392.

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Анотація:

This paper presents a comparative study on the application of different neural network structures to early detection of electrical faults in induction motor drives. The diagnosis inference of the stator inter-turn short-circuits and broken rotor bars is based on the analysis of an axial flux of the induction motor. In order to automate the fault detection process, three different structures of neural networks were used: multi-layer perceptron, self-organizing Kohonen network and recursive Hopfield network. Tests were carried out for various levels of stator and rotor failures. In order to assess the sensitivity of the applied neural detectors, the tests were carried out for variable load conditions and for different values of the supply voltage frequency. Experimental results of the elaborated neural detectors are presented and discussed.

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32

Zamudio-Ramírez, Israel, Roque Alfredo Osornio-Ríos, Jose Alfonso Antonino-Daviu, and Alfredo Quijano-Lopez. "Smart-Sensor for the Automatic Detection of Electromechanical Faults in Induction Motors Based on the Transient Stray Flux Analysis." Sensors 20, no. 5 (March 8, 2020): 1477. http://dx.doi.org/10.3390/s20051477.

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Induction motors are essential and widely used components in many industrial processes. Although these machines are very robust, they are prone to fail. Nowadays, it is a paramount task to obtain a reliable and accurate diagnosis of the electric motor health, so that a subsequent reduction of the required time and repairing costs can be achieved. The most common approaches to accomplish this task are based on the analysis of currents, which has some well-known drawbacks that may lead to false diagnosis. With the new developments in the technology of the sensors and signal processing field, the possibility of combining the information obtained from the analysis of different magnitudes should be explored, in order to achieve more reliable diagnostic conclusions, before the fault can develop into an irreversible damage. This paper proposes a smart-sensor that explores the weighted analysis of the axial, radial, and combination of both stray fluxes captured by a low-cost, easy setup, non-invasive, and compact triaxial stray flux sensor during the start-up transient through the short time Fourier transform (STFT) and characterizes specific patterns appearing on them using statistical parameters that feed a feature reduction linear discriminant analysis (LDA) and then a feed-forward neural network (FFNN) for classification purposes, opening the possibility of offering an on-site automatic fault diagnosis scheme. The obtained results show that the proposed smart-sensor is efficient for monitoring and diagnosing early induction motor electromechanical faults. This is validated with a laboratory induction motor test bench for individual and combined broken rotor bars and misalignment faults.

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33

Lance-Jones, Cynthia, Natalia Omelchenko, Anya Bailis, Stephen Lynch, and Kamal Sharma. "Hoxd10 induction and regionalization in the developing lumbosacral spinal cord." Development 128, no. 12 (June 15, 2001): 2255–68. http://dx.doi.org/10.1242/dev.128.12.2255.

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We have used Hoxd10 expression as a primary marker of the lumbosacral region to examine the early programming of regional characteristics within the posterior spinal cord of the chick embryo. Hoxd10 is uniquely expressed at a high level in the lumbosacral cord, from the earliest stages of motor column formation through stages of motoneuron axon outgrowth. To define the time period when this gene pattern is determined, we assessed Hoxd10 expression after transposition of lumbosacral and thoracic segments at early neural tube stages. We present evidence that there is an early prepattern for Hoxd10 expression in the lumbosacral neural tube; a prepattern that is established at or before stages of neural tube closure. Cells within more posterior lumbosacral segments have a greater ability to develop high level Hoxd10 expression than the most anterior lumbosacral segments or thoracic segments. During subsequent neural tube stages, this prepattern is amplified and stabilized by environmental signals such that all lumbosacral segments acquire the ability to develop high levels of Hoxd10, independent of their axial environment. Results from experiments in which posterior neural segments and/or paraxial mesoderm segments were placed at different axial levels suggest that signals setting Hoxd10 expression form a decreasing posterior-to-anterior gradient. Our experiments do not, however, implicate adjacent paraxial mesoderm as the only source of graded signals. We suggest, instead, that signals from more posterior embryonic regions influence Hoxd10 expression after the early establishment of a regional prepattern. Concurrent analyses of patterns of LIM proteins and motor column organization after experimental surgeries suggest that the programming of these characteristics follows similar rules.

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34

Jastrzębski, Rafał P., Alexander Smirnov, Katja Hynynen, Janne Nerg, Jussi Sopanen, Tuomo Lindh, Janne Heikkinen, and Olli Pyrhönen. "Commissioning and Control of the AMB Supported 3.5 kW Laboratory Gas Blower Prototype." Solid State Phenomena 198 (March 2013): 451–56. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.451.

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This paper presents the practical results of the design analysis, commissioning, identification, sensor calibration, and tuning of an active magnetic bearing (AMB) control system for a laboratory gas blower. The presented step-by-step procedures, including modeling and disturbance analysis for different design choices, are necessary to reach the full potential of the prototype in research and industrial applications. The key results include estimation of radial and axial disturbance forces caused by the permanent magnet (PM) rotor and a discussion on differences between the unbalance forces resulting from the PM motor and the induction motor in the AMB rotor system.

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35

Williamson, S., and C. I. McClay. "The effect of axial variations in saturation due to skew on induction motor equivalent-circuit parameters." IEEE Transactions on Industry Applications 35, no. 6 (1999): 1323–31. http://dx.doi.org/10.1109/28.806046.

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36

Panigrahy, Parth Sarathi, and Paramita Chattopadhyay. "Tri-axial vibration based collective feature analysis for decent fault classification of VFD fed induction motor." Measurement 168 (January 2021): 108460. http://dx.doi.org/10.1016/j.measurement.2020.108460.

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37

Nasiri-Gheidari, Z., and H. Lesani. "Using stator discharge current for the parameter estimation of a single-phase axial flux induction motor." Scientia Iranica 19, no. 6 (December 2012): 1794–801. http://dx.doi.org/10.1016/j.scient.2012.05.006.

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38

Rashchepkin, A. P., О. M. Karlov, and R. S. Kryshchuk. "STRUCTURE OF MAGNETIC FIELD OF THE AXIAL ARC-STATOR INDUCTION MOTOR WITH SOLID BIMETALLIC DISC ROTOR." Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini 2017, no. 47 (July 18, 2017): 28–36. http://dx.doi.org/10.15407/publishing2017.47.028.

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39

Hong, Cencen, Wenxin Huang, and Zhenwei Hu. "Calculation methods of equivalent circuit parameters for a dual stator solid rotor axial flux induction motor." IET Renewable Power Generation 12, no. 16 (October 31, 2018): 1977–83. http://dx.doi.org/10.1049/iet-rpg.2018.5103.

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40

Hong, Cencen, Wenxin Huang, and Zhenwei Hu. "Design and Analysis of a High-Speed Dual Stator Slotted Solid-Rotor Axial-Flux Induction Motor." IEEE Transactions on Transportation Electrification 5, no. 1 (March 2019): 71–79. http://dx.doi.org/10.1109/tte.2018.2880301.

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41

Wei, Qin, Fan Yu, Fang Jin, Li Shuo, Li Guoguo, and Lv Gang. "Characteristic and magnetic field analysis of a high temperature superconductor axial-flux coreless induction maglev motor." Journal of Applied Physics 111, no. 7 (April 2012): 07E707. http://dx.doi.org/10.1063/1.3671783.

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42

Titova, T. S., A. M. Evstaf’ev, and A. A. Pugachev. "Vector control system of electric traction drive with power losses minimization." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042090. http://dx.doi.org/10.1088/1742-6596/2131/4/042090.

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Abstract Based on the operating conditions analysis of electric traction drives of locomotives, it has been established that the vector control systems for an asynchronous motor fully satisfy all the requirements. On the basis of a T-shaped equivalent circuit, a mathematical model of an induction motor is presented, taking into account losses in the stator steel, the effect of the rotor current and saturation displacement. An algorithm for the formation of the optimal, from the point of view of power losses, task for the rotor flux linkage when using a vector control system with the orientation of the axes of the coordinate system along the rotor magnetic field, is developed. The limiting factors are the limitations on the current and voltage of the motor stator, the diesel generator set power. A shared control system for an electric traction drive with asynchronous motors has been developed, which provides direct control of wheel slip with a subordinate vector control system that minimizes power losses. The results of modeling in a steady-state operation and a start-up mode for an electric traction drive of a two-axle bogie with axial support and 630 kW asynchronous motors with the use of various options for organizing circuit reentrances are presented.

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43

Zajac, Mieczysław, and Maciej Sułowicz. "Periodic flows of the axial flux signal energy making it difficult of the induction motor faults detection." International Journal of Applied Electromagnetics and Mechanics 57 (April 8, 2018): 235–49. http://dx.doi.org/10.3233/jae-182319.

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44

Filho, Paulo C. M. Lamim, Deivity C. Santos, Fabiano B. Batista, and Lane M. R. Baccarini. "Axial Stray Flux Sensor Proposal for Three-Phase Induction Motor Fault Monitoring by Means of Orbital Analysis." IEEE Sensors Journal 20, no. 20 (October 15, 2020): 12317–25. http://dx.doi.org/10.1109/jsen.2020.2999547.

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45

Lin, Ranran, Ari Haavisto, and Antero Arkkio. "Axial Flux and Eddy-Current Loss in Active Region of a Large-Sized Squirrel-Cage Induction Motor." IEEE Transactions on Magnetics 46, no. 11 (November 2010): 3933–38. http://dx.doi.org/10.1109/tmag.2010.2064782.

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46

Skowron, Maciej, and Teresa Orłowska-Kowalska. "Efficiency of Cascaded Neural Networks in Detecting Initial Damage to Induction Motor Electric Windings." Electronics 9, no. 8 (August 15, 2020): 1314. http://dx.doi.org/10.3390/electronics9081314.

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This article presents the efficiency of using cascaded neural structures in the process of detecting damage to electrical circuits in a squirrel cage induction motor (IM) supplied from a frequency converter. The authors present the idea of a sequential connection of classic neural structures to increase the efficiency of damage classification and detection presented by individual neural structures, especially in the initial phase of single or multiple electrical failures. The easily measurable axial flux signal is used as a source of diagnostic information. The developed cascaded neural networks are implemented in the measurement and diagnostic software made in the LabVIEW environment. The results of the experimental research on a 1.5 kW IM supplied by an industrial frequency converter confirm the high efficiency of the use of the developed cascaded neural structures in the detection of incipient stator and rotor winding faults, namely inter-turn stator winding short circuits and broken rotor bars, as well as mixed failures in the entire range of changes of the load torque and supply voltage frequency.

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47

Shchur, Ihor, Vsevolod Shchur, Ihor Bilyakovskyy, and Mykhailo Khai. "Hardware in the loop simulative setup for testing the combined heat power generating wind turbine." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (March 1, 2021): 499. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp499-510.

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This paper describes the design and implementation of hardware in the loop (HIL) system based on induction motor wind turbine emulator for the study of the operation of a combined heat-power (CHP) generating wind energy conversion system (WECS). The energy generation part of the WECS consists of two specially designed generators that are placed on a common vertical axis, which is connected to the induction motor through a gearbox. The first generator is an electric two-armature axial PMSG and the second one is a thermal electromagnetic retarder. The software part of the HIL setup simulates the interaction of the wind flow with a vertical axis wind turbine (VAWT) and is implemented in a programmable logic controller based on the model developed in the MATLAB/Simulink. The results of experimental studies of the CHP WECS with the created HIL simulative setup at both constant and turbulent wind speeds have shown good agreement with the corresponding results of computer simulation. The created HIL simulative setup will be used for the development of an energy management system for CHP WECS.

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48

Ewert, Paweł. "Application of Neural Networks and Axial Flux for the Detection of Stator and Rotor Faults of an Induction Motor." Power Electronics and Drives 4, no. 1 (June 1, 2019): 203–15. http://dx.doi.org/10.2478/pead-2019-0001.

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Abstract The paper presents the possibility of using neural networks in the detection of stator and rotor electrical faults of induction motors. Fault detection and identification are based on the analysis of symptoms obtained from the fast Fourier transform of the voltage induced by an axial flux in a measurement coil. Neural network teaching and testing were performed in a MATLAB–Simulink environment. The effectiveness of various neural network structures to detect damage, its type (rotor or stator damage) and damage levels (number of rotor bars cracked or stator winding shorted circuits) is presented.

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49

Hong, Cencen, Wenxin Huang, and Zhenwei Hu. "Parameters and performance analysis of a dual stator composite rotor axial flux induction motor by an analytical method." IET Electric Power Applications 12, no. 8 (June 8, 2018): 1158–65. http://dx.doi.org/10.1049/iet-epa.2017.0786.

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50

Klimenta, Dardan, and Antti Hannukainen. "Novel approach to analytical modelling of steady-state heat transfer from the exterior of TEFC induction motors." Thermal Science 21, no. 3 (2017): 1529–42. http://dx.doi.org/10.2298/tsci150629091k.

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The purpose of this paper is to propose a novel approach to analytical modelling of steady-state heat transfer from the exterior of totally enclosed fan-cooled induction motors. The proposed approach is based on the geometry simplification methods, energy balance equation, modified correlations for forced convection, the Stefan-Boltzmann law, air-flow velocity profiles, and turbulence factor models. To apply modified correlations for forced convection, the motor exterior is presented with surfaces of elementary 3-D shapes as well as the air-flow velocity profiles and turbulence factor models are introduced. The existing correlations for forced convection from a short horizontal cylinder and correlations for heat transfer from straight fins (as well as inter-fin surfaces) in axial air-flows are modified by introducing the Prandtl number to the appropriate power. The correlations for forced convection from straight fins and inter-fin surfaces are derived from the existing ones for combined heat transfer (due to forced convection and radiation) by using the forced-convection correlations for a single flat plate. Employing the proposed analytical approach, satisfactory agreement is obtained with experimental data from other studies.

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