Дисертації з теми "High speed rotor"
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Miller, Philip A. "High-speed rotor testing and spin-test facility development." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/5492.
Повний текст джерелаPapini, Luca. "Performance calculation of high speed solid rotor induction machine." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52180/.
Повний текст джерелаChu, Fulei. "The vibration control of a flexible rotor by means of a squeeze-film damper." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386603.
Повний текст джерелаIrenji, Neamat Taghizadeh. "Calculation of electromagnetic rotor losses in high-speed permanent magnet machines." Thesis, University of Southampton, 1998. https://eprints.soton.ac.uk/47948/.
Повний текст джерелаSamadli, Vugar. "Rotor-bearing system dynamics of a high-speed micro end mill spindle." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015756.
Повний текст джерелаMarais, Charl Henri. "High speed flexible rotor active magnetic bearing control / by Charl Henri Marais." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1084.
Повний текст джерелаThesis (M. Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2006.
Qazalbash, Arfakhshand. "Rotor eddy current power losses in high speed permanent magnet synchronous generators." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/364580/.
Повний текст джерелаSoliman, Mohamed Mostafa Ezzat. "An investigation into circulation control with reference to high forward speed rotor." Thesis, University of Southampton, 1985. https://eprints.soton.ac.uk/52305/.
Повний текст джерелаChristiansen, Christoffer. "Material choice for a rotor in a switched reluctance high speed motor." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-62582.
Повний текст джерелаRanft, Cornelius Jacobus Gerhardus. "Mechanical design and manufacturing of a high speed induction machine rotor / Cornelius Ranft." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4940.
Повний текст джерелаThesis (M.Ing. (Mechanical Engineering))--North-West University, Potchefstroom Campus, 2011.
Park, Jae Do Hofman Heath F. "Modeling and control of a high-speed solid-rotor synchronous reluctance flywheel motor/generator." [University Park, Pa.] : Pennsylvania State University, 2007. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-1881/index.html.
Повний текст джерелаPeabody, Frank Gerald. "An investigation of high speed, thin steel rotor, annular, double sided, linear induction motors." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29056.
Повний текст джерелаApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Hieke, Sebastian, Mario Stamann, Dmytro Lagunov, Roberto Leidhold, Andrii Masliennikov, Aleksei Duniev, and A. Yehorov. "Two-phase transverse flux machine with disc rotor for high torque low speed application." Thesis, EPE’17 ECCE Europe, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39783.
Повний текст джерелаAlsaeed, Ali A. "A Study of Methods for Improving the Dynamic Stability of High-Speed Turbochargers." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/26664.
Повний текст джерелаPh. D.
Bu, Jianrong. "High performance rotor position sensorless control of switched reluctance machines over a wide speed range /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487949836205613.
Повний текст джерелаGarratt, John Edward. "Mathematical modelling of air-rotor-stator interactions in high-speed air-riding bearing and seal technology /." Thesis, University of Nottingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580292.
Повний текст джерелаGuilbert, Bérengère. "Hybrid modular models for the dynamic study of high-speed thin -rimmed/-webbed gears." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI127/document.
Повний текст джерелаThe research work presented in this manuscript was conducted in the Contact and Structural Mechanics Laboratory (LaMCoS) at INSA Lyon, in partnership with Safran Helicopter Engines (formerly-Turbomeca). In helicopters, the power from the turboshaft is transmitted to the rotor and the various accessories (pumps, starters etc…) via transmission gearboxes. In the context of high-speed, light-weight aeronautical applications, mechanical parts such as gears have to meet somehow contradictory design requirements in terms of reliability and mass reduction thus justifying precise dynamic simulations. The present work focuses on the definition of modular gear dynamic models, capable of integrating both the local phenomena associated with the instant contact conditions between the tooth flanks and the more global aspects related to shafts, bearings and particularly the contributions of light thin-rimmed /-webbed gear bodies. The proposed models rely on combinations of condensed sub-structures, lumped parameter and beam elements to simulate a pinion-gear pair, shafts, bearings and housing. Mesh elasticity is time-varying, possibly non-linear and is accounted for by Winkler foundations derived from a classic thin-slice model. The contact lines in the base plane are therefore discretised into elemental segments which are all attributed a mesh stiffness function and a normal deviation which are updated depending on the pinion and gear angular positions. The main originality in this PhD consists in inserting condensed finite elements models to simulate flexible gear bodies while keeping the simple and faster rigid-body approach for solid gears. To this end, a specific interface has been developed to connect the discretised tooth contact lines to the continuous finite element gear body models and avoid numerical spikes in the tooth load distributions for example. A number of comparisons with numerical and experimental results show that the proposed modelling is sound and can capture most of the quasi-static and dynamic behaviour of single stage reduction units with thin-webbed gears and/or pinions. The model is then applied to the analysis of academic and industrial gears with the objective of analysing the contributions of thin, flexible bodies. Results are presented which highlight the role of centrifugal effects and tooth shape modifications at high speeds. Finally, the possibility to further improve gear web design with regard to mass reduction is investigated and commented upon
Rowan, D. "Design and development of a high-speed test facility and the measurement of the fluid film characteristics of journal bearings." Thesis, Cranfield University, 1998. http://dspace.lib.cranfield.ac.uk/handle/1826/11357.
Повний текст джерелаCourtiade, Nicolas. "Experimental analysis of the unsteady flow and instabilities in a high-speed multistage compressor." Phd thesis, Ecole Centrale de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00838695.
Повний текст джерелаTarek, Md Tawhid Bin. "Optimal High-Speed Design and Rotor Shape Modification of Multiphase Permanent Magnet Assisted Synchronous Reluctance Machines for Stress Reduction." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1510617496931844.
Повний текст джерелаBosworth, Jeff. "Investigation of a stop-fold tiltrotor." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29662.
Повний текст джерелаCommittee Chair: Hodges, Dewey; Committee Member: Bauchau, Olivier; Committee Member: Sankar, Lakshmi. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Antoun, labib Joseph. "Modélisation des écoulements confinés entre un stator et un rotor ultra-rapide." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0079/document.
Повний текст джерелаThe project e-MECA: electromechanical engineering Embarked in Improved Compactness, the objective of which is to design a machine with a small gap and high speed rotor with a useful power of 12Kw, finds its application in mild and hybrid vehicle. This type of machine indeed presents a high potential in the industrial deployment in very big series to affordable prices. The losses in these machines are linked to the flow in the gap has a significant importance for the manufacturers. This study aims to identify these losses for the ultra-compact and ultrafast electric machines (50 000 rpm).This thesis is a study of the air losses in the space between the rotor and the stator of an ultra-fast electric machine (≈ 250 m/s) and ultra-compact (0,5mm - 2mm of air-gap). This study was done to meet the specifications that had been elaborated by our partners in the e-MECA project
Messali, Amir. "Contribution to Rotor Position and Speed Estimation for Synchronous Machine Drive Using High Frequency Voltage Injection : Application to EV/HEV Powertrains." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0048.
Повний текст джерелаThis thesis is part of the Renault / Centrale Nantes Chair on improving the performance of electric vehicles (EV / HEV). It is dedicated to the problem of estimating the position / speed of self-sensing permanent magnet synchronous motors (PMSM) without mechanical sensors, using high frequency (HF) signal injection techniques over the full speed range of PMSM. In this context, several contributions have been proposed in the demodulation / signal processing and tracking algorithms parts of HF injection techniques, in order to improve the estimation of the position / speed of the MSAP compared to the existing methods. In the demodulation / signal processing part of the HF injection techniques, the contributions consisted of proposing original solutions making it possible to reduce the filtering effects in the estimation chain and to make the latter independent of the electrical machine parameters. In the tracking part, the contributions mainly concern the use of the function sign of the position error (instead of the position error) as measurement information, to estimate the position, the speed and the acceleration of self-sensing PMSM with firstorder sliding mode observers (conventional, step-by-step and adaptive). The contributions proposed in both parts have the advantages of robustifying the estimation chain by making it independent of electrical and mechanical parameters on the one hand. On the other hand, they allow improving the accuracy and performance of the estimation chain, and therefore the control of self-sensing PMSM, in transient and steady-state phases with an easy tuning method. The estimation methods developed were tested in simulation and experimentation on a test bench of electrical machines. The results obtained made it possible to highlight the performances of these methods in terms of trajectory tracking and robustness over the entire operating range of PMSM self-sensing control
Karásek, Ladislav. "Návrh vysokootáčkového motoru 350kW 40 000min-1." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242110.
Повний текст джерелаKrál, Radek. "Vysokootáčkový synchronní stroj s vnějším rotorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442788.
Повний текст джерелаKlusáček, Jiří. "Návrh a analýza vysokorychlostního asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219182.
Повний текст джерелаKlíma, Jiří. "Analýza vysokootáčkového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220922.
Повний текст джерелаSvoreň, Jan. "Návrh vysokootáčkového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219753.
Повний текст джерелаČech, Jiří. "Návrh vysokootáčkového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413035.
Повний текст джерелаAdabi, Firouzjaee Jafar. "Remediation strategies of shaft and common mode voltages in adjustable speed drive systems." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/39293/1/Jafar_Adabi_Firouzjaeel_Thesis.pdf.
Повний текст джерелаGahagan, Shane G. "Pressure-sensitive paint measurements on a rotor disk surface at high speeds." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA333428.
Повний текст джерелаThesis advisor, Raymond P. Shreeve. AD-A333 428. Includes bibliographical references (p. 49-50). Also available online.
Pavlík, Ondřej. "Návrh kompozitní objímky rotoru vysokootáčkového rotačního stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382567.
Повний текст джерелаMarchand, Marc Pierre. "Static and dynamic balancing of high speed fibre composite rotors." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4929.
Повний текст джерелаPhilipp, Katrin, Angelos Filippatos, Nektarios Koukourakis, Robert Kuschmierz, Christoph Leithold, Albert Langkamp, Andreas Fischer, and Jürgen Czarske. "In-process deformation measurements of translucent high speed fibre-reinforced disc rotors." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A35189.
Повний текст джерелаBílek, Vladimír. "Elektromagnetická analýza a modelování asynchronního stroje s plným rotorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442791.
Повний текст джерелаO'Leary, Beth Andrews. "Analysis of high-speed rotating systems using Timoshenko beam theory in conjunction with the transfer matrix method /." Online version of thesis, 1989. http://hdl.handle.net/1850/10608.
Повний текст джерелаBořil, Michal. "Návrh vysokootáčkového synchronního stroje s permanentními magnety o výkonu 3 MW." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413037.
Повний текст джерелаLapôtre, Blaise. "Modélisation des moteurs auto-lévités haute vitesse à aimants permanents en vue de leur conception, alimentation et commande." Electronic Thesis or Diss., Université de Lorraine, 2016. http://www.theses.fr/2016LORR0323.
Повний текст джерелаThe thesis deals with an alternate solution mixing the functions of an electric motor and active magnetic bearing with the same device. A spectral magnetic models taking into account the different flux density harmonics and their sources are developed. The interaction of different space harmonics of the air-gap flux density is highlighted and modeled in order to evaluate their contributions to the levitation force and its ripples. These models allow the magnetic design of bearingless machines. In order to supply and control such machines, a specific lumped circuit model is developed. This study allows to design the optimal winding which minimizes the constraints on the converter. Finally, a specific prototype is designed and manufactured in order to validate theoretic results provided during this thesis
Káčer, Pavel. "Frézování axiálních drážek v rotoru turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228097.
Повний текст джерелаBenjanirat, Sarun. "Computational studies of the horizontal axis wind turbines in high wind speed condition using advanced turbulence models." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-08222006-145334/.
Повний текст джерелаSamual V. Shelton, Committee Member ; P.K. Yeung, Committee Member ; Lakshmi N. Sankar, Committee Chair ; Stephen Ruffin, Committee Member ; Marilyn Smith, Committee Member.
Kurfűrst, Jiří. "Optimalizace stroje s permanentními magnety na rotoru pomocí umělé inteligence." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233585.
Повний текст джерелаSghaier, Emna. "Dynamique des rotors à très hautes vitesses et en régime non-stationnaire - Identification par le filtre de Kalman." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASC013.
Повний текст джерелаIn the frame of the growing trend of promoting the carbon-free mobility, RedHV+ project is carried out in order to investigate whether or not it is possible to manufacture a high-speed and high performance gearbox compatible with car costs. As part of this project, a new dynamic model for very high speed rotors working at non-stationary operating conditions is proposed.First, the different assumptions used for rotordynamics modeling are separated into different categories and classified based on the order of complexity they add to the model. Then, according to the operating conditions of the RedHV+ test bed, a choice of the most realistic modeling assumptions is done. As a first step of the dynamic modeling, the work focused on monorotors. In this study, we suggest not to make any assumption on the angular speed. The rotor shaft is flexible in traction, bending and torsion. The energy source is assumed to be non-ideal and the angular displacement including both the rigid body motion and the torsional deformation is assessed. The dynamic model leads to a novel expression of the gyroscopic effect terms. It shows its capacity, through both its analytical expression as well as through numerical results, to accurately introduce the coupling between the flexural and torsional degrees of freedom. The results are presented at a first step, for a simple rotor made of a shaft, a disk and flexible support. Another degree of complexity is introduced later, by considering a geared parallel-rotor system. The aim is to improve the accuracy of simulations for the rotor dynamics in non-stationary conditions especially when getting through critical speeds.The study of geared systems mainly focuses on the dynamic modeling of a simplified architecture of the RedHV+ test bed. The results obtained using the new dynamic model show interesting conclusions regarding the vibration behavior of the rotor when crossing the critical speeds. The reached vibration levels, in the presence of elastic coupling, highlight the importance of a correct dimensioning of a rotating machinery going through critical speeds.Finally, an identification tool based on the Unscented Kalman Filter is developed in order to enrich the dynamic models of the rotating machineries with more realistic values of its uncertain parameters. The identification tool showed interesting results and it is shown that its performance increases when the rotor goes through critical speeds
Gomes, Luciano Coutinho. "Acionamento vetorial de motores de indução trifásicos com enfraque-cimento de campo e maximização do conjugado por ampère." Universidade Federal de Uberlândia, 2008. https://repositorio.ufu.br/handle/123456789/14250.
Повний текст джерелаThis work investigates the operation of three phase induction motors in field weakening and high speed regions. Maximum torque per ampère is imposed by using an indirect vector control strategy. Mathematical models that accounts for magnetic saturation is used for simulations and adjustment of controllers used in control algorithm. The driving structure is characterized by the use of VSI static converter with sinusoidal PWM switching strategy and a vector control technique based on orthogonal components. Investigations resulted in the development of a digital simulation using discrete models that turned out generic and reliable, and an experimental system using a low cost fixed point DSP platform. Simulated and experimental results are included and shown the robustness and efficiency of the proposed control system under different operating conditions.
O presente trabalho tem como objetivo estudar a operação de motores de indução trifásicos em regime de enfraquecimento de campo e altas velocidades, com maximização do conjugado por ampère, através de um sistema de acionamento vetorial. Para tanto, foi utilizado uma modelagem matemática completa, por fase, que emprega o conceito de função harmônica magnética e considera as componentes, fundamental e de terceiro harmônico do fluxo de entreferro. A estrutura de acionamento caracteriza-se pela utilização de um inversor de tensão PWM senoidal e da técnica de controle vetorial, esta baseada em componentes ortogonais. A evolução do trabalho resultou no desenvolvimento de uma plataforma de simulação computacional baseada em modelos discretos que é bastante genérica e confiável, e um sistema experimental utilizando um processador digital de sinais de baixo custo com aritmética de ponto fixo. Os resultados de simulação e experimentais que avaliam a eficiência do sistema de controle proposto sob diversas condições de operação e efeitos de dessintonia são apresentados e apontam para robustez do método.
Doutor em Ciências
Chang, tou koan, and 張圖寬. "Multiobjective Optimization of Rotor-Bearing System of High Speed Spindle." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/77709802722415909977.
Повний текст джерела國立中正大學
機械工程學系
85
The dynamic behavior and optimum design of rotor-bearing system of high speed spindle are studied in this thesis. It consists of the outer shaft and the inner shaft. The outer shaft is composed of the center shaft and the rotor of AC motor. And the inner shaft is the tool holder. The outer shaft is joined together with the inner shaft via two join points. The dynamic behavior of the rotor-bearing system is modeled by the finite element method. Then the system natural frequencies are determined by the numerical analysis. Because the mass of the outer shaft may be much greater than that of the inner shaft, the single rotor-bearing system is also used to compare the behavior of the dual rotor-bearing system. The system natural frequencies are measured to compare the numerical results. Furthermore, the system steady-state response is also studied. In optimization, the Augmented Lagrange Multiplier Method (ALMM) and Modified Method of Feasible Direction (MMFD) of mathematical programming method are applied in this study. Also, both the single objective optimization and the multiobjective optimization are performed and the optimum results are compared. The optimum results indicate that the steady-state response at the front bearing and/or the transmitted forces through the bearings can be significantly reduced by single objective optimization or multiobjective optimization.
Su, Guo-Bin, and 蘇國賓. "Rotor Dynamic Analysis of Equivalent Direct Model for the High Speed Spindle with Hot-Fitted Rotor." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/82402628787765557195.
Повний текст джерела遠東科技大學
機械工程研究所
104
Motor built-in high speed spindle is characterized by high speed cutting. It mainly utilizes hot-fit to combine shaft with motor rotor. Secondly, it utilizes drawbar mechanism to provide clamping force to grip the toolholder for machining and form a new shaft-rotor-toolholder system. Contact analysis of motor rotor hot-fitted onto shaft and contact analysis of toolholder and spindle-taper hole under different clamping forces are both design emphases of motor built-in high speed spindle. In this study, finite element solid modeling is used, and performs finite element contact analysis and modal analysis to investigate dynamic stiffness changes of two contact surfaces (shaft-rotor contact surface and shaft-toolholder contact surface) under various parameter conditions. Furthermore, this paper also proposes an optimal equivalent area moment of inertia direct modeling to improve the problem of lacking physical rationality existing in equivalent Young's modulus direct modeling method described in previous researches, and applies this optimal modeling method into rotor dynamic analysis. Analysis results obtained from this study show that contact analysis and modal analysis by using finite element solid modeling can be used to correctly simulate dynamic characteristic of two contact surface problem of shaft-rotor-toolholder system. Secondly, based on optimal equivalent area moment of inertia method proposed in this paper, a line element model with equivalent shaft external diameter can be constructed. With the shaft-rotor-toolholder-bearing system formed after addition of bearing rigidity, more accurate rotor dynamic analysis could be obtained.
王育隆. "Dynamic analysis and control of high speed rotor in magnetic bearing." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/19437552045915611934.
Повний текст джерелаHuang, Bin. "Optimum balancing of high speed uncertain flexible rotor systems using convex optimization /." 2007. http://wwwlib.umi.com/dissertations/fullcit/3248095.
Повний текст джерелаLin, Chang-ming, and 林昌明. "Operation Modes Prediction of a High Speed Rotor with Dual-Point Measurement." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/n9tgvb.
Повний текст джерела國立中山大學
機械與機電工程學系研究所
97
This paper adopts a dual-point measurement technique to predict the resonance frequency and operation modes of a high speed rotor at different operating speed. The effect of balance policy on the operating mode shapes of a rotor has also been investigated. Displacement signals measured at two different points of a rotating shaft are used to estimate the operation mode shapes at the main operating frequency based on the definition of transmissibility function. To verify the feasibility of this technique, the dynamic parameters, i.e. natural frequencies, damping ratio and normal modes of a stationary rotor are measured in advance by applying the traditional frequency response method for comparison. The values of modal assurance criterion (MAC) and mode shape diagrams indicate that both methods are in a good agreement on the normal modes when the system is undamped or lightly damped. However, a significant difference is observed for highly damped modes. The dual-point measurement technique is applicable to investigate the effect of rotating speed on measured operation modes at different speed. Results indicate that the rotating speed may affect the dynamic parameters of a rotating shaft significantly. Furthermore, the dynamic unbalance effect on the response of a rotating shaft has also been studied in this thesis. Results indicate that the position of the unbalance is quite sensitive to the response of a rotating shaft. The sensitivity of unbalance and its position is dependent on the operation mode correspondence to the driving speed. The measured results indicate the dual-point measurement is quite available to study the dynamic responses of a rotating shaft or rotor.
Yeh, Ting-Chyi, and 葉汀岐. "Robust Control of the Magnetic Rotor-Bearing System in a High-Speed Spindle." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/10633914528240994759.
Повний текст джерела國立中正大學
機械系
87
This study deals with the robust control of a magnetic rotor-bearing system. The system is taken from a high-speed spindle in a machine center. Instead of the commonly used uncoupled linear models, a magnetically coupled nonlinear model is considered here. A robust sliding mode controller is designed based on the coupled nonlinear model. It is found from numerical simulations that the closed-loop system not only achieves stabilization and high precision, but also is robust to parameter variations, external noises, impact loads, cutting forces, and mass unbalance.
Wu, Zhi-Zheng, and 吳智正. "Study of High Speed Copper-rotor Induction Machines in Machine Tools Spindle Applications." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/vubk9z.
Повний текст джерела國立清華大學
動力機械工程學系
107
This thesis aims at high-speed induction motors applied to the machine tool spindles covering topics of basic motor design rules, motor design steps, selection of design parameters, and Computer-Aided Engineering simulation processes. Based on adjusting the winding and slot structure, magnetic field distribution in air gap and relavent radial electromagnetic forces on stator tooths are carefully reviewed. Throughout optimization, the optimal geometry, the slot numbers, diametric ratio of stator and rotor, and turns of winding are calculated; and, the ultimate goal is to reduce vibration and acoustic noises plus performance for spindle motors running at high speed. The study has been adopting a commercial software package copyrighted by ANSYS Inc., bundled with Electronics EM and Mechanical Workbench, for numerical simulation of physical quantities and electromagnetic field details. By preliminary correlation of results in magnetostatic and transient field analysis, electromagnetic and structural coupling analysis is cosimulated to give cross-coupling acoustic and vibrational results. Finally, verifications of the design parameters have been conducted for laboratory-scale copper rotor induction spindle motors to justify the accuracy and practicality of the motor design process.