Relevant bibliographies by topics / Design of rotor slot

Contents

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

Academic literature on the topic 'Design of rotor slot'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Design of rotor slot"

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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 sub-part rotor design and six-slot/three-pole salient rotor design have an overlapped winding arrangement between armature coil and field excitation coil that depicts high copper losses as well as results in increased size of motor. Additionally, a field excited flux switching machine with a salient structure of the rotor has high flux strength in the stator-core that has considerable impact on high iron losses. Therefore, a novel topology in terms of modular rotor of single-phase field excited flux switching machine with eight-slot/six-pole configuration is proposed, which enable non-overlap arrangement between armature coil and FEC winding that facilitates reduction in the copper losses. The proposed modular rotor design acquires reduced iron losses as well as reduced active rotor mass comparatively to conventional rotor design. It is very persuasive to analyze the range of speed for these rotors to avoid cracks and deformation, the maximum tensile strength (can be measured with principal stress in research) of the rotor analysis is conducted using JMAG. A deterministic optimization technique is implemented to enhance the electromagnetic performance of eight-slot/six-pole modular rotor design. The electromagnetic performance of the conventional sub-part rotor design, doubly salient rotor design, and proposed novel-modular rotor design is analyzed by 3D-finite element analysis (3D-FEA), including flux linkage, flux distribution, flux strength, back-EMF, cogging torque, torque characteristics, iron losses, and efficiency.
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Bradley, H. Guldemir, K. J. "The Effect of Rotor Design on Rotor Slot Harmonics in Induction Machines." Electric Power Components and Systems 29, no. 9 (2001): 771–88. http://dx.doi.org/10.1080/153250001317094199.

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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 pole combinations are determined according to the winding coefficient, stator size, and electromagnetic performance requirements. Further, finite element models of SPM machines with different stator slot and rotor pole combinations are established by Ansys Maxwell. On this basis, the back electromotive force (back EMF), cogging torque, electromagnetic torque, and loss and efficiency of SPM machines are calculated and compared to select the better stator slot and rotor pole combinations. Further, effects of pole arc coefficient on cogging torque and electromagnetic torque are also researched to guide the selection of the pole arc coefficient in the design process of the SPM machine. Conclusions achieved in this paper will provide guidance for design of the SPM machine.
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Delirani, Zohreh, Akbar Rahideh, and Mohammad Mardaneh. "Analytical calculations of electromagnetic quantities for wound rotor salient-pole synchronous machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 40, no. 3 (2021): 325–57. http://dx.doi.org/10.1108/compel-03-2020-0115.

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Purpose This paper aims to present an analytical electromagnetic model for wound rotor synchronous machines with a salient-pole rotor structure based on the two-dimensional subdomain technique. Design/methodology/approach The machine is divided into five active sub-regions: stator slots, stator slot openings, air gap, rotor slots and rotor slot openings. For each sub-region, the governing partial differential equations are derived and solved analytically. Findings The magnetic flux density distributions in all active sub-regions are analytically computed and other quantities such as back-emf, inductances, electromagnetic torque and unbalanced magnetic forces are also analytically calculated. The results of the analytical model are compared to those obtained from the finite element analysis to show the accuracy of the proposed model. Originality/value The two-dimensional analytical model of a wound rotor salient-pole synchronous machine using the sub-domain technique is the main contribution of the research.
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Keskin Arabul, Fatma, Ibrahim Senol, and Yasemin Oner. "Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor." Energies 13, no. 19 (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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Dems, Maria, Krzysztof Komeza, Slawomir Wiak, and Sara Fernández Coya. "Influence of the closing rotor slots on the additional losses in the induction motor." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 34, no. 2 (2015): 531–49. http://dx.doi.org/10.1108/compel-07-2014-0183.

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Purpose – The purpose of this paper is to present the distribution of the magnetic field and additional losses analysis of the induction motors (IM) with opened and closed rotor slots. Design/methodology/approach – In the field-circuit approach the distribution and changes of magnetic flux density in the motor are computed using a time-stepping finite element method. The additional losses in each element are evaluated at different frequencies. Findings – An approximate analytical formulation is derived for rapid losses computation confirmed by the results of field-circuit method. For high-voltage motors due to the size ratios of the core and relatively deep stator and rotor slots major role in causing loss of higher harmonics play a fundamental slot harmonics. Higher harmonics order bigger than 100 cause only small part of total higher harmonics core losses. Closed rotor slots construction influenced significantly on no-load losses mainly due to reduction of losses at slot upper part. For nominal load condition that influence is not so strong according to the saturation of slot tips by rotor leakage flux. Nevertheless, core losses at load are several times higher as at no-load. Research limitations/implications – In future research authors will take into account motors feed from PWM inverter, working in the frequency range up to 400 Hz. Practical implications – The results of investigation will be used in more detailed design of IMs especially for motors with closed rotor slots. Originality/value – The methods presented in the paper was not used before. Also results of additional losses in the motor core calculation, especially according motors with closed slots at no load and load conditions are new.
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Sulaiman, Erwan, Hassan Ali, Mubin Aizat, and Zhafir Aizat. "Improved Design of Three Phase Hybrid Excitation Flux Switching Motor with Segmental Rotor." Applied Mechanics and Materials 785 (August 2015): 295–99. http://dx.doi.org/10.4028/www.scientific.net/amm.785.295.

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This paper presents the new design of Hybrid Excitation Flux Switching Motor (HEFSM) using segmental rotor structure. HEFSMs are those that consist all the excitation flux sources at their stator with robust rotor structure. The rotor is designed as segmental due to the reason that segmental rotor has ability to yield the magnetic path for conveying the field flux to nearby stator armature coil with respect to the rotation of the rotor. This design gives the clear advantage of shorter end winding compared to the toothed rotor as there is no overlap winding between field excitation coil (FEC) and armature coil. In this paper the initial design of HEFSM with segmental rotor has been improved by changing segment span, FEC slot area and armature slot area until maximum torque and power of 33.633 Nm and 8.17 KW respectively have been achieved. Moreover coil test analysis, induced voltage, cogging torque, magnetic flux characteristics, torque vs. field current density and torque vs. power speed characteristics are examined on the basis of 2-D finite element analysis (FEA).
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Lian, Jia Di, Sheng Chang Zhang, Hong Ying Deng, Yu Long Ke, Xi Dong Chen, and Yu Lin Zhang. "Research and Optimization on Slot Profile of Multi Stage and Double-Action Roller Rotary Pump." Advanced Materials Research 403-408 (November 2011): 3182–85. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.3182.

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Through force analysis of running roller for multi stage and double-action roller rotary pump, the force equilibrium equation about roller was established and the calculation formula of rotor slot profile was deduced for the first time. Using an actual design example, in accordance with the principle of sliding friction force to be a minimum, a optimal rotor slot angel was determined which can eliminate the dead volume, improve force condition of roller, and direct the direction for the future rotor slot profile optimization.
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Yahya, Yanawati, and Mohd Khairil Rahmat. "Induction motor rotor bars type effects towards energy efficiency, economic and environment." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (2020): 1188. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1188-1196.

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<span lang="EN-MY">Nowadays, the rotating motor is the most demoralized machine for the global Motor industry. Comfort of practice, start-up, small, weightiness, Increased efficiency, low maintenance and inexpensive for each power rating that generally meets the necessary features for industries. Efficient improvements are inspected with copper for the rotor bars slot. Usually, the copper loss in the induction motor Rotor division contributes to the loss of energy. The research work was planned a new rotor design, by improved rotor bars type slot, size and design. These tasks were inspected using two approaches, in particular, MotorSolve (IM) and calculations in theory. One set of simulation has shown a significant increase in energy efficiency for a new rotor frame design. Calculations in theory are used MATLAB. As a result, these new designs have improved energy efficiency by 77% as compared to its 74% existing design. The results proved to be using MATLAB. For energy, cost savings and emission reduction (ER), new design rotor frame has been saved 154KWH/year, utility bill RM 60.20/Year and 0.113 CO<sub>2 </sub>tons/years intended for individually motor. Finally, the estimated cost aimed at 100,000 pieces of new rotor bars pattern induction motor and indicates this price was kept almost RM6 million.</span>
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Sandeep, V., and Sharankumar Shastri. "Analysis and Design of PMBLDC Motor for Three Wheeler Electric Vehicle Application." E3S Web of Conferences 87 (2019): 01022. http://dx.doi.org/10.1051/e3sconf/20198701022.

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This paper deals with analysis and design of permanent magnet brushless dc machine (PMBLDCM), primarily aimed for three wheeler applications. The motor sizing accounts for the forces acting on the motor and the design variables such as number of stator and rotor slots, stator and rotor dimensioning, air-gap approximation, slot sizing, flux per pole and permanent magnet sizing has been explained using simplified equations. The designed motor rated at 1.5 kW, 3000 rpm, 120 V radial flux surface mounted permanent magnet rotor, is then assessed using analytical tools for design such as ANSYS’s RMXprt to verify the analytically obtained results. These results are then verified using the computer aided analysis tool, finite element analysis, using ANSYS Maxwell, to obtain the electromagnetic characteristics of the motor for further modification of design.
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Dissertations / Theses on the topic "Design of rotor slot"

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Le, Luong Huong Thao. "Optimal Design of Modular High Performance Brushless Wound Rotor Synchronous Machine for embedded systems." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0111/document.

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Cette thèse est dédiée à la conception optimale de la machine synchrone à rotor bobiné modulaire sans balais pour les systèmes embarqués. Cette machine est basée sur une structure POKIPOKITM développée par Mitsubishi Electric Coopération avec les convertisseurs de puissance intégrée pour augmenter la capacité de tolérance aux défauts. L'analyse électromagnétique est utilisée pour étudier les différentes machines synchrones à rotor bobiné et donc, pour sélectionner la structure qui offre la meilleure tolérance aux défauts et les performances les plus élevées. D’abord, le choix des nombres de phases, d’encoches et de pôles est un point critique. Ensuite, quelques machines sont analysées et comparées selon les critères tels que la densité de couple, le rendement, l'ondulation de couple. La machine avec 7 phases, 7 encoches et 6 pôles est alors choisie. Cette machine est ensuite comparée à la machine synchrone à aimant permanent monté en surface. Le résultat démontre que la machine synchrone à rotor bobiné modulaire sans balais possède le potentiel de remplacer la machine synchrone à aimant permanent dans notre application parce qu’elle présente des performances similaires avec une capacité de tolérance aux défauts élevée. Dans un second temps, une fois la structure 7phases/7encoches/6pôles choisie, cette machine est optimisée en utilisant NOMAD (qui est un logiciel d'optimisation de boîte noire) afin de minimiser le volume externe sous les contraintes électromagnétiques, thermiques et mécaniques. Comme ce problème d'optimisation est extrêmement difficile à résoudre, quelques relaxations ont été effectuées pour tester les différents algorithmes d'optimisation : fmincon (de Matlab) et NOMAD. Nous remarquons que NOMAD est plus efficace que fmincon pour trouver des solutions à ce problème de conception où certaines contraintes sont calculées par des simulations numériques (ANSYS Maxwell ; code éléments finis). En utilisant la méthode NOMAD basée sur l’algorithme Mesh Adaptive Direct Search, nous obtenons des résultats optimaux qui satisfont toutes les contraintes proposées. Il est nécessaire de valider ce design optimisé en vérifiant toutes les contraintes par des simulations électromagnétiques et thermiques en 3D. Les résultats montrent que le couple moyen obtenu par la simulation en 3D est inférieur à la valeur souhaitée. Par conséquent, en augmentant la longueur de la machine, une nouvelle machine corrigée est ainsi obtenue. Nous observons que les pertes de fer obtenues en 3D sont plus élevées qu'en 2D en raison du flux de fuite dans la tête de bobinage. En prenant les valeurs des pertes analysées par la simulation en 3D, la température de surface de la nouvelle machine analysée par la méthode Computational Fluid Dynamics est plus élevée que celle calculée dans l’optimisation. Enfin, un prototype de machine est construit et quelques tests expérimentaux est réalisés. Le résultat montre que la force électromotrice à vide a une forme d'onde similaire par rapport à la prédiction numérique en 3D et la différence de couple statique maximum entre les tests expérimentaux et les simulations par éléments finis en 3D est faible<br>This thesis is dedicated to the design and the optimization of modular brushless wound rotor synchronous machine for embedded systems. This machine is constructed based on POKIPOKITM structure with integrated drive electronics. Finite element analysis based optimization becomes more popular in the field of electrical machine design because analytical equations are not easily formalized for the machines which have complicate structures. Using electromagnetic analysis to comparatively study different modular brushless wound rotor synchronous machines and therefore, to select the structure which offers the best fault tolerant capability and the highest output performances. Firstly, the fundamental winding factor calculated by using the method based on voltage phasors is considered as a significant criterion in order to select the numbers of phases, stator slots and poles. After that, 2D finite element numerical simulations are carried out for a set of 15 machines to analyze their performances. The simulation results are then compared to find an appropriate machine according to torque density, torque ripple and machine efficiency. The 7phase/7-slot/6-pole machine is chosen and compared with a reference design surfacemounted permanent magnet synchronous machine in order to evaluate the interesting performance features of the wound rotor synchronous machine. In the second design stage, this machine is optimized by using derivative-free optimization. The objective is to minimize external volume under electromagnetic, thermal and mechanical constraints. Given that an accurate finite element analysis for machine performance takes a long time. Moreover, considering that the average torque can be obtained by simulating the model with only four rotor positions instead of one electric period, optimization strategy is proposed to reduce computational time and therefore, obtain a fast convergence ability by defining relaxed problems which enable minimizing the external volume of the machine under only several constraints such as average torque, torque ripple and copper losses. By testing relaxed problems, two different optimization methods (NOMAD and fmincon) are compared in order to select an appropriate method for our optimization problem. Using NOMAD method based on Mesh Adaptive Direct Search, we achieve optimal results which satisfy all of the constraints proposed. In the third design stage, all constraints are validated by 3D electromagnetic and thermal simulations using finite element and computational fluid dynamics methods. The 3D results show that the average torque obtained is lower than the desired value. By increasing the length of the machine, a new corrected machine is thus obtained. It can be observed that the iron losses obtained in 3D are higher than that in 2D due to the leakage flux in the end-winding. Then, the machine temperature is analyzed by using ANSYS Fluent. Note that the surface temperature is higher than that calculated in the optimization and the coil temperature is 8.48°C higher than the desired value (105°C). However, some dissipation by the shaft and the bearings of the machine are expected to reduce the machine temperature. Finally, a machine prototype is built and some experimental tests are carried out. The results show that the electromotive force has a similar waveform compared to 3D prediction and the difference of the measured and predicted maximum static torques is small
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Theodossopoulos, Konstantinos. "Rectilinear slot model of an inclined slot radiator in rectangular waveguide." Thesis, Heriot-Watt University, 2000. http://hdl.handle.net/10399/577.

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Štaffa, Jiří. "Ztráty jednofázového asynchronního motoru s trvale připojeným kondenzátorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221263.

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This project deals with increasing efficiency of one phase induction motor with permanent split capacitor. We can whole thesis divide into two parts, the first one is basic and the second is interested in analysis and measurement. First part handles with construction of single phase induction motor, explanation of function principle, start and run of motor. Calculating of efficiency including type of losses, which reduce efficiency. Second part concerns analysis losses including moment load characteristic, motor measurement while rotor is locked, with no load operation, measuring mechanical and additional losses. Further there will be measured useful values for creation model for simulation (reactance of windings etc.). Than will be the model created in ANSYS Maxwell with module RMxprt. After analytic calculation in RMxprt and using Finite Element Method (FEM) load characteristics will be compared together. This comparison gives us information about accuracy of model for simulation. Simulation and measurement will be carried out on another engine with high quality ferromagnetic material used for magnetic circuit of motor. Further will be done simulation of motor with modifications shown in previous chapter for high efficiency.
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Ferrah, Azzeddine. "A novel approach to sensorless speed detection using rotor slot harmonics in induction motor drives." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336699.

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Robinson, Michael J. "Finite element calculation of equivalent circuit parameters for induction motors." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/8003.

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Zachariadis, Alexios. "Open rotor design for low noise." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608815.

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Wang, Sheng. "Design of Tapered Slot Element for Broadband Arrays." Thesis, Queen Mary, University of London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509588.

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Jami, Valentina. "Development of Computer Program for Wind Resource Assessment, Rotor Design and Rotor Performance." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1513703072278665.

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Gatti, Mauro <1977&gt. "Design and Prototyping High Endurance Multi-Rotor." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7124/.

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The topic of this thesis fo cus on the preliminary design and the p erformance analysis of a multirotor platform. A multirotor is an electrically p owered Vertical Take Off (VTOL) machine with more than two rotors that lift and control the platform. Multirotor are agile, compact and robust, making them ideally suited for b oth indo or and outdo or application especially to carry-on several sensors like electro optical multisp ectral sensor or gas sensor. The main disadvantage is the limited endurance due to heavy Li-Po batteries and high disk loading through the use of different small prop ellers. At the same time, the design of the multirotor do es not follow any engineering principle but it follow the ideas of amateurs’ builder. An adaptation of the classic airplane design theory for the preliminary design is implemented to fill the gap and detailed study of the endurance is p erformed to define the right way to make this kind of VTOL platforms.
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Altzar, Oskar. "Crack initiation in hydro power plant rotor rim sheets : A failure case study for Juktan hydro power plant." Thesis, KTH, Materialvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152588.

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In 2013, cracks were found in the radius of the dovetail slots of the rotor rim sheets in generator 1 of Juktan hydro power plant in Västerbotten, Sweden. The cracks were estimated to be too deep to be able to repair and Alstom conducted an investigation on the cause of fracture. The investigation came to the conclusion that the radius was too small and that the new rotor rim sheets should have a six times greater fillet radius. However, it has not been investigated whether the material structure or the manufacturing process may have an impact on the crack initiation and following propagation that is the focus of this report.Parts of the dovetail slots were cut out and characterized with XRF, SEM and LOM. Further mechanical characterizations were done according to Vickers.From the SEM and LOM micrographs a high amount of large (10μm) and cubic particles were found in the microstructure. The micrographs also showed a deformation of the microstructure and the hardness test showed a deformation hardening near the edge where the sheet had been punched. The edge surface of the sheet also had notches.The large and hard particles in the microstructure impair the mechanical properties of the steel. Furthermore, the hardening effect combined with the notches will make a good crack initiation point. Therefore, there is a higher possibility that a crack will initiate in the radius of the dovetail slots where large stresses occur.
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Books on the topic "Design of rotor slot"

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Kvaternik, Raymond G. Airframe structural dynamic considerations in rotor design optimization. National Aeronautics and Space Administration, Langley Research Center, 1989.

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Wilson, Jack. Design of the NASA Lewis 4-port wave rotor experiment. National Aeronautics and Space Administration, 1997.

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Huppunen, Jussi. High-speed solid-rotor induction machine: Electromagnetic calculation and design. Lappeenranta University of Technology, 2004.

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Paxson, Daniel E. An improved numerical model for wave rotor design and analysis. National Aeronautics and Space Administration, 1992.

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Moura, Geraldo A. Macedo. An approach for design and analysis of composite rotor blades. Naval Postgraduate School, 1989.

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Chattopadhyay, Aditi. Performance of an optimized rotor blade at off-design flight conditions. National Aeronautics and Space Administration, 1990.

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Nguyen-Schäfer, Hung. Rotordynamics of Automotive Turbochargers: Linear and Nonlinear Rotordynamics – Bearing Design – Rotor Balancing. Springer Berlin Heidelberg, 2012.

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Mathur, Atul B. Wave rotor research: A computer code for preliminary design of wave programs. Naval Postgraduate School, 1985.

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Wilson, Jack. An experiment on losses in a three-port wave rotor. National Aeronautics and Space Administration, 1997.

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Simcoe, Michael K. The design of high-gain slot arrays on electrically thick substrates for millimeter-wave applications. National Library of Canada, 2001.

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Book chapters on the topic "Design of rotor slot"

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Yang, Yuanyuan, Bulai Wang, Xiutao Ji, Xiangsheng Liu, and Panyuan Ren. "Auxiliary Rotor Slot Optimization Design for Improving Back-EMF Waveform of PMSM Based on MagneForce." In Proceedings of 2018 Chinese Intelligent Systems Conference. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2288-4_12.

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Asanbayev, Valentin. "The Double-Cage Rotor: The Slot Leakage Circuit Loops." In Alternating Current Multi-Circuit Electric Machines. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10109-5_13.

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Asanbayev, Valentin. "The Triple-Cage Rotor: The Slot Leakage Circuit Loops." In Alternating Current Multi-Circuit Electric Machines. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10109-5_15.

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Asanbayev, Valentin. "Solid Rotor with Conducting Slot Wedges: Leakage Circuit Loops." In Alternating Current Multi-Circuit Electric Machines. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10109-5_21.

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Asanbayev, Valentin. "The Single-Cage Rotor: The Slot Leakage Circuit Loops." In Alternating Current Multi-Circuit Electric Machines. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10109-5_9.

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Mouriaux, S., F. Bassi, A. Colombo, and A. Ghidoni. "NASA Rotor 37." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62048-6_20.

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Ito, H., K. Matsuyama, H. Koinuma, K. Saito, Y. Yoshioka, and K. Nagata. "Fretting Fatigue in Slot Dovetail of Turbo-generator Rotor Shaft." In Challenges of Power Engineering and Environment. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-76694-0_75.

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Kydyrbekuly, A. "Rotor-Liquid-Fundament System’s Oscillation." In Advances in Mechanisms Design. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5125-5_30.

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Yuvaraj, S., and M. Anantha Kumar. "Design of Magnetic Wheel Rotor." In Lecture Notes in Mechanical Engineering. Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1871-5_30.

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Caramaschi, Vittorio, and Claudio Monteggia. "Innovative Rotor Blade Design Code." In Variational Analysis and Aerospace Engineering. Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-95857-6_4.

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Conference papers on the topic "Design of rotor slot"

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Nee, H. P. "Rotor slot design of inverter-fed induction motors." In Seventh International Conference on Electrical Machines and Drives. IEE, 1995. http://dx.doi.org/10.1049/cp:19950834.

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Zhu, Mingmin, Xiaoqing Qiang, and Jinfang Teng. "Numerical Investigation on Slot Casing Treatment in a Transonic Axial Compressor Stage: Part 1 — Casing Treatment Design." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65260.

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Slot-type casing treatment generally has a great potential of enhancing the operating range for tip-critical compressor rotors, however, with remarkable efficiency drop. Part I of this two-part paper was committed to develop a slot configuration with desired stall margin improvement and minimized efficiency loss. Steady simulation was carried out in a 1.5 transonic axial compressor stage at part design rotating speed. At this rotating speed this compressor stage operated at a subsonic condition and showed a rather narrow operating range, which needed to be improved badly. Flow fields analysis at peak efficiency and near stall point showed that the development of tip leakage vortex and resulting blockage near casing resulted in numerical stall. Three kinds of skewed slots with same rotor exposure and casing porosity were designed according to the tip flow field and some empirical strategies. Among three configurations, arc-curved skewed slot showed minimum peak efficiency drop with considerable stall margin improvement. Then rotor exposure and casing porosity were varied based on the original arc-curved skewed slot, with a special interest in detecting their impact on the compressor stability and overall efficiency. Result showed that smaller rotor exposure and casing porosity leaded to less efficiency drop. But meanwhile, effectiveness of improving compressor stability was weakened. The relation between efficiency drop and stall margin improvement fell on a smooth continuous curve throughout all slots configurations, indicating that the detrimental effect of casing treatment on compressor was inevitable. Flow analysis was carried out for cases of smooth casing and three arc-curved configurations at smooth casing near stall condition. The strength of suction/injection, tip leakage flow behavior and removal of blockage near casing were detailed examined. Larger rotor tip exposure and slots number contributed to stronger injection flow. The loss generated within the mixing process of injection flow with main flow and leakage flow is the largest source of entropy increase. Further loss mechanisms were interpreted at eight axial cuts, which were taken through the blade row and slots to show the increase in entropy near tip region. Entropy distributions manifested that loss generations with smooth casing were primarily ascribed to low-momentum tip leakage flow/vortex and suction surface separation at leading edge. CU0 slot, the arc-curved slots with 50% rotor tip exposure, was capable of suppressing the suction surface separation loss. Meanwhile, accelerated tip leakage flow brought about additional loss near casing and pressure surface. Upstream high entropy flow would be absorbed into the rear portion of slots repeatedly, resulting in further loss.
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Djeghri, Noureddine, Huu Duc Vo, and Hong Yu. "Parametric Study for Lossless Casing Treatment on a Mixed-Flow Compressor Rotor." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42750.

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A systematic numerical study has been carried out to investigate the effects of casing treatment slots geometry and location on the stall margin and peak efficiency of an isolated mixed-flow rotor at high subsonic flow conditions. Based on the literature review for axial rotor, a semi-circular axial skewed slot casing treatment placed in the leading edge region was chosen as the starting configuration as it has the best potential of producing stall margin improvement with low peak efficiency loss. A computational parametric study was performed from this baseline casing treatment geometry to identify the most important geometrical design parameters and to arrive at a design with noticeable stall margin improvement and no loss in peak efficiency. The results show that the design parameters with the largest impact on stall margin improvement and peak efficiency are: open area ratio, slot skew angle, slot axial length and slot axial position. The slots depth and slot shape seem to have only limited influence on performance. While not yet optimized, a slot casing treatment design with significant stall margin improvement and no loss in peak efficiency was obtained. To the authors’ knowledge, this work is the most extensive slot casing treatments parametric study so far in term of number of design parameters considered.
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Lu, Jialing, Wuli Chu, and Yanhui Wu. "Investigation of Skewed Slot Casing on Transonic Axial-Flow Fan Stage." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59417.

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In this paper, a highly loaded transonic fan stage, which was designed and tested by Wennerstrom in the 70’s was selected to study the functions of skewed slot casing treatments. Three casings, each different in axial locations and slot directions, were designed and numerically studied by this research. Experience on optimum slot location and direction was summarized. The simulation was run by commercial CFD software Fine/Turbo. Un-steady simulations were performed on the casing treated rotors to depict the real nature of unsteadiness in a slotted casing. The rotor exit boundary conditions were set according to the parameters extracted from the stage simulation. With this condition, computational expense was much saved, and the attention was made solely focused on the slots and rotor interaction. Performance simulation at partial design speed (70% design speed) was also conducted. Unexpected performance improvement with the treated casing was observed at this speed. This unusual phenomenon was analyzed, with a corresponding explanation provided.
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Fireteanu, V., T. Tudorache, and O. A. Turcanu. "Optimal Design of Rotor Slot Geometry of Squirrel-Cage Type Induction Motors." In 2007 IEEE International Electric Machines & Drives Conference. IEEE, 2007. http://dx.doi.org/10.1109/iemdc.2007.382724.

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Kim, K. "Optimal design of rotor slot shape of indution motor for Electric Vehicle." In 2015 IEEE International Magnetics Conference (INTERMAG). IEEE, 2015. http://dx.doi.org/10.1109/intmag.2015.7157603.

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Kim, Kwangsoo, Seung-Bin Lim, and Ju Lee. "Design of rotor slot of single phase induction motor with copper die-cast rotor cage for high efficiency." In INTELEC 2009 - 2009 International Telecommunications Energy Conference. IEEE, 2009. http://dx.doi.org/10.1109/intlec.2009.5352013.

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Lassim, Nurrulaishah, Syed Muhammad Naufal Syed Othman, Enwelum I. Mbadiwe, Mohd Fairoz Omar, and Erwan Sulaiman. "Investigation of Various Design Slot Pole of Field Excitation Flux Switching Machines with Segmental Rotor." In 2019 IEEE 10th Control and System Graduate Research Colloquium (ICSGRC). IEEE, 2019. http://dx.doi.org/10.1109/icsgrc.2019.8837052.

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Wettergren, Håkan L. "Material and Microslip Damping in a Rotor Taking Gravity and Anisotropic Bearings Into Account." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8339.

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Abstract The paper is concerned with material and microslip damping in a rotor. The horizontal rotor is carried by anisotropic bearings, which means that the shaft feels three different frequencies, the rotational frequency and the difference and the sum of the rotational and vibrational frequencies. When material damping is studied these three frequencies lead to three different equivalent viscous damping constants and the dissipated energy can be solved analytically. The rotor slot wedges in a turbine generator are used as an example of microslip damping. In this case the damping is non-linear and the results are obtained through numerical simulations. The results show that these two different internal damping sources give both similarities and dissimilarities. The sign change and different magnitude of the dissipated energy running sub- or supercritical are the same. However the dissipated energy for material damping is not affected by gravity which microslip damping is.
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Omar, Mohd Fairoz, Erwan Sulaiman, Faisal Khan, Gadafi M. Romalan, and Muhammad Kamaluddin Hassan. "Performances comparison of various design slot pole of Field Excitation Flux Switching Machines with segmental rotor." In 2015 IEEE Conference on Energy Conversion (CENCON). IEEE, 2015. http://dx.doi.org/10.1109/cencon.2015.7409562.

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Reports on the topic "Design of rotor slot"

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Roth, P. G. Probabilistic Rotor Design System (PRDS) -- Gas Turbine Engine Design. Defense Technical Information Center, 1998. http://dx.doi.org/10.21236/ada378908.

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Barone, Matthew F., Jonathan Charles Berg, and Daniel Griffith. Reference Model 2: "Rev 0" Rotor Design. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1126471.

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Roth, P. G. Probabilistic Rotor Design System (PRDS). Phase 2. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada328075.

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Kelley, Christopher Lee. Aerodynamic design of the National Rotor Testbed. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1346410.

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Rucinski, Russell A., and Alan Bross. Final Design Report for the M.I.C.E. 2 Slot VLPC Cryocooler Cryostat. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/1460797.

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Rucinski, Russell A. Design of a 2 Slot VLPC Cryostat Cooled by a Cryocooler. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/1033659.

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Berg, Jonathan C., Brian R. Resor, Joshua A. Paquette, and Jonathan R. White. SMART Wind Turbine Rotor: Design and Field Test. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1220845.

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Berg, Jonathan Charles, Brian Ray Resor, Joshua A. Paquette, and Jonathan Randall White. SMART wind turbine rotor. Design and field test. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1204070.

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Chen, K. S., and W. R. Witkowski. Design optimization of a liquid-distribution chamber-slot die using the DAKOTA toolkit. Office of Scientific and Technical Information (OSTI), 1997. http://dx.doi.org/10.2172/468578.

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Malcolm, D. J., and A. C. Hansen. WindPACT Turbine Rotor Design Study: June 2000--June 2002 (Revised). Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/15000964.

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