Дисертації з теми "Multi-phase machine"
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COSSALE, MARCO. "Multi-phase Starter-Generator for 48 V Mild-Hybrid Powertrains." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2667599.
Повний текст джерелаVichis-Rodriguez, Damian Sergio. "Modelling of three phase AC machines suitable for internal fault simulation, detection and analysis in multi-machine power systems." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1782/.
Повний текст джерелаSTISCIA, ORNELLA. "Performance evaluation of three and multi-three-phase electrical machines using off-line mapping." Doctoral thesis, Politecnico di Torino, 2023. https://hdl.handle.net/11583/2975703.
Повний текст джерелаZahr, Hussein. "Machine Pentaphasée A Double Polarité Pour Electrification Du Domaine Des Transports Par Effet Boite De Vitesse Electromagnétique." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0058/document.
Повний текст джерелаPermanent Magnet electrical machines , appreciated for their high power density, equip the majority of the electrified vehicles. However, controlling these machines, in the constant power range of the propulsion system while mastering the losses, with PM reversible demagnetization remains a challenge especially under varying thermal environnement. Proposed solutions aim for protecting PM from irreversible demagnetization are costly: oversizing or using very rare earth PM (Dysprosium).In this thesis, we proposed to add on the reversible demagnetization approach universally used , that of a electromagnetic gearbox. Thus, we design a five phase PM machine.Increasing the phase number from three to five, increases the adjustment parameter of the electrical supply, and allows to have two fictitious machines with p and 3 p poles. Each fictitious machine contributes equivalently in producing torque. Practically, the optimal use of these two machines leads to reconstructing the gearbox function
Meinguet, Fabien. "Fault-tolerant permanent-magnet synchronous machine drives: fault detection and isolation, control reconfiguration and design considerations." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209757.
Повний текст джерелаIn this work, a multidisciplinary approach for the design of fault-tolerant permanent-magnet synchronous machine drives is presented.
The drive components are described, including the electrical machine, the IGBT-based two-level inverter, the capacitors, the sensors, the controller, the electrical source and interfaces. A literature review of the failure mechanisms and of the reliability model of most of these components is performed. This allows understanding how to take benefit of the redundancy generally introduced in fault-tolerant systems.
A necessary step towards fault tolerance is the modelling of the electrical drive, both in healthy and faulty operations. A general model of multi-phase machines (with a number of phases equal to or larger than three) and associated converters is proposed. Next, control algorithms for multi-phase machines are derived. The impact of a closed-loop controller upon the occurrence of faults is also examined through simulation analysis and verified by experimental results.
Condition monitoring of electrical machines has expanded these last decades. New techniques relying on various measurements have emerged, which allow a better planning of maintenance operations and an optimization of the uptime of electrical machines. Regarding drives, a number of sensors are inherently present for control and basic protection functions. The utilization of these sensors for advanced condition monitoring is thus particularly interesting since they are available at no cost.
A novel fault detection and isolation scheme based on the available measurements (phase currents, DC-link voltage and mechanical position) is developed and validated experimentally. Change-detection algorithms are used for this purpose. Special attention is paid to sensor faults as well, what avoids diagnosis errors.
Fault-tolerant control can be implemented with passive and active approaches. The former consists in deriving a control scheme that gives acceptable performance for all operating conditions, including faulty conditions. The latter consists in applying dedicated solutions upon the occurrence of faults, i.e. by reconfiguring the control. Both approaches are investigated and implemented.
Finally, design considerations are discussed throughout the thesis. The advantages and drawbacks of various topologies are analyzed, which eventually leads to the design of a five-phase fault-tolerant permanent-magnet synchronous machine.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Rakgati, Edward Tshitshiri. "Torque Performance of Optimally Designed Multi-Phase Reluctance DC Machines." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1174.
Повний текст джерелаJones, Martin. "A novel concept of series connected multi-phase, multi-motor drive systems." Thesis, Liverpool John Moores University, 2005. http://researchonline.ljmu.ac.uk/5654/.
Повний текст джерелаBonthu, Sai Sudheer Reddy. "Optimal Design and Comparative Analysis of Multi-Phase Permanent Magnet Assisted Synchronous Reluctance Machines." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1439393220.
Повний текст джерелаFogue, Médard. "Critère de fatigue à longue durée de vie des états multi axiaux de contraintes sinusoïdales en phase et hors phase." Lyon, INSA, 1987. http://www.theses.fr/1987ISAL0030.
Повний текст джерелаFracture of mechanical parts in operation are induced mainly by fatigue ( 90%). The stress state are generally multiaxial but surprisingly,criteria which permit safety evaluation are few and not well based in theory and not well suited for practice. The multiaxial fatigue criterion proposed in this report is based on quadratic average of the intensity of tangential and normal stress. This criterion satisfies theoretical requirements and all practical consequences as diagrams of HAIGH in traction and torsion are deduced from it. The validity domain in τ(-1)/σ(-1) is between 0,577 and 0,866. A general program of calculation has been developed. The criterion has been validated by tests found in the technical literature following an original method of statistical validation applied to the comparison of the equivalent stress and of fatigue limit σ(-1). The criterion is qualified for 70 to 80 % of studied tests
Wredh, Simon. "Neural Network Based Model Predictive Control of Turbulent Gas-Solid Corner Flow." Thesis, Uppsala universitet, Signaler och system, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420056.
Повний текст джерелаDIANA, MICHELA. "Tooth-coil wound multiphase synchronous machines." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2713044.
Повний текст джерелаMupambireyi, Ushindibaba. "Modelling, analysis and control of multi-phase electronically commutated DC machines : an enabling topology for DC converter fed networks." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/101516/.
Повний текст джерелаAboelhassan, Mustafa Osman Elrayah. "Robustní řízení synchronního stroje s permanentními magnety a spínaným tokem." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233605.
Повний текст джерелаDos, santos moraes Tiago José. "Conception d'entrainement multimachines multi-convertisseurs à haut niveau de fiabilité fonctionnelle." Thesis, Paris, ENSAM, 2017. http://www.theses.fr/2017ENAM0026/document.
Повний текст джерелаIn airplanes and launch vehicles, hydraulics, mechanical and pneumatic systems are progressively being replaced by electric systems for technical and industrial reasons. However, these new electric systems have to take into account the economical and weight reliability constraints of the aeronautics industry, ensuring the required reliability. Therefore, novel high reliability multi-machine and multi-converter topologies are compared to standard structures looking forward to find solutions that can be industrially implemented. Then, series-coupled machine topologies were chosen for this work. The series-coupling mutualizes the inverter legs, reducing their number, and increases the total electrical resistance of the system. As a consequence, the peak-current after the occurrence of certain faults is reduced, but the total copper losses are higher. In order to independently control the series-coupled machines, it is highlighted the reason why the number of phases must be higher than 3 and with a special electric coupling that permutes the machine’s phases. A new patented topology is deeply analyzed with experimental tests. After a validation of the studied system, more complex control strategies and control reconfiguration after a fault are also implemented in order to evaluate the potential improvements on the system performance in degraded mode. Simulation and experimental results were used on this study. For this analysis the dimensioning power of the inverter, the copper losses and the torque ripple, all of them in degraded mode, are the compared criterions
Nguyen, Ngoc Linh. "Predictive control of two synchronous machines in parallel supplied by a standard three phase static converter." Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/9906/1/nguyen.pdf.
Повний текст джерелаArafat, AKM. "ANALYSIS AND CONTROL OF FIVE-PHASE PERMANENT MAGNET ASSISTED SYNCHRONOUS RELUCTANCE MOTOR DRIVE UNDER FAULTS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1524168102423576.
Повний текст джерелаAlley, Erick Shaw. "Influence of microstructure in rolling contact fatigue of bearing steels with inclusions." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28127.
Повний текст джерелаCommittee Chair: Neu, Richard; Committee Member: Damm, E. Buddy; Committee Member: Gall, Ken; Committee Member: Gokhale, Arun; Committee Member: McDowell, David; Committee Member: Zhou, Min
Hung, Chih-Wei, and 洪智韋. "Locality Aware Multi-Phase Pre-Copy Strategy for Virtual Machine Live Migration." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/j6w862.
Повний текст джерела中華大學
資訊工程學系碩士班
101
Live migration technology of virtual machine enables real machines to become more flexible in terms of its functions, thus raising the utilization of resources in clouds. The key technology of using live migration of virtual machine lies in the pre-copy strategy; through which virtual machine can perform live migrate with no interruption of service provided by virtual machine. In order to have an efficient live migration, it is imperative that the migration of virtual machines’ memories is not limited by bandwidth and lower the downtime of the virtual machines. Presently, the live migration algorithm provided by Xen would perform repetitive transfer of memory pages, resulting in waste of bandwidth and hence decreased of migration efficiency. Therefore, how to formulate an efficient algorithm of live migration is an important issue. This thesis presents a live migration algorithm, termed as Multi-Phase Pre-Copy (MPP). In the iterative pre-copy stage, memory pages will be transmitted only if the predefined thresholds were met. In such way, the repetitiveness migration of memory pages can be significantly reduced. In addition, we also implemented a virtual machine image transformation interface, which is able to convert an image format. Advantage of the transformation tool is that a user can run different VMs on single physical machine. As a result, cost for h/w investment can be significantly reduced. The simulation of Multi-Phase Pre-Copy algorithm has demonstrated a dramatic reduction of live migration time. In the best case, it can reduce 84% transmission of memory pages.
Paul, Sayan. "Modulation of Power Electronic Converter Fed Split-phase Induction Machine Drive." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4471.
Повний текст джерелаFigueiras, Hugo dos Santos. "Diagnóstico de avarias nos ímanes permanentes de um PMSM de seis fases." Master's thesis, 2021. http://hdl.handle.net/10316/98126.
Повний текст джерелаO Mundo está em grande mudança. Existe atualmente uma clara viragem do ponto de vista energético. A crescente aposta em energias renováveis, eficiência energética, mobilidade elétrica, entre outros, faz com que a inovação e desenvolvimento nestes setores esteja em alto crescimento. Obviamente que para isto, existe uma simbiose entre a indústria e a ciência. As publicações nestas áreas multiplicam-se e esta dissertação surgiu com o intuito de colmatar referências na área das máquinas elétricas, nomeadamente das Máquinas Multifásicas de Ímanes Permanentes. O trabalho realizado teve como objetivo principal perceber o estado da arte quanto aos métodos de diagnóstico de falhas nos ímanes permanentes de máquinas multifásicas de ímanes permanentes e, a partir de simulações criadas para o efeito, avaliar a possibilidade da criação de novas abordagens relativamente ao diagnóstico desta falha. O Capítulo 1 menciona o enquadramento do tema da dissertação, bem como, qual a motivação para a elaboração deste documento. O Capítulo 2 aborda quais os tipos de falhas que se podem encontrar nas máquinas em estudo, referindo as falhas elétricas, mecânicas e magnéticas. É apresentado também uma revisão geral dos métodos de diagnóstico já existentes, onde são abordados os diversos sinais já estudados e quais as conclusões retiradas para as máquinas em estudo, terminando com uma comparação entre eles. O Capítulo 3 inicia a descrição da máquina estudada, bem como qual foi o procedimento adotado para a realização das diversas simulações e análises aos diferentes estados simulados. Primeiramente, é descrita as duas falhas que induzimos na máquina, desmagnetização de um conjunto de ímanes de um polo e a sua totalidade, referindo qual o método utilizado para a criação de ambas. Numa segunda fase, são estudados quatro sinais: tensão do estator, tensão de neutros, corrente i_dq, fluxo encadeado e os erros de predição de corrente. O Capítulo 4 conclui este trabalho, enunciando as vantagens e desvantagens dos vários métodos, sumarizando as conclusões obtidas no Capítulo 3 relativas à variação dos métodos estudados com a velocidade da máquina, regime de carga e a severidade da carga, essencialmente. Por fim, são apontados quais os métodos que apresentam melhores características quanto ao diagnóstico de falha por desmagnetização dos ímanes permanentes para a máquina estudada, avaliação da tensão de neutros e os erros de predição de corrente.
The world is undergoing great change. There is currently a clear shift from an energy point of view. The growing bet on renewable energies, energy efficiency, electric mobility, amongst others means that innovation and development in these sectors are booming. Due to this, there is a symbiosis between industry and science. There are numerous publications in this area and this dissertation aims to add more knowledge in the field of electrical machines, namely multiphase permanent magnet machines. The main objective of the work carried out was to understand the state-of-the-art methods regarding diagnosing damage in the permanent magnets of permanent magnet multiphase machines and, based on simulations created for this purpose, to try to understand the possibility of creating new approaches regarding this malfunction. Chapter 1 mentions the framework and motivation that led us to carry out this dissertation, as well as the objectives outlined initially. Chapter 2 begins by addressing the types of malfunctions we can find in the machine's understudy, then referring to a general review of existing diagnostic methods, ending with a comparison between them based on various aspects. Chapter 3 begins with a complete description of the machine that we studied and what was the procedure adopted to carry out the different simulations and analyzes the different simulated states. Firstly, we describe the two faults that we induced in the machine, the demagnetization of a set of magnets from a pole and its entirety, referring to the method used to create both. In a second phase, four signals are studied: stator voltage, the voltage between neutrals, i_dq current, chained flux, and current prediction errors. Chapter 4 concludes this work, listing the advantages and disadvantages of the different methods, summarizing the conclusions obtained in Chapter 3 regarding the variation of the studied methods with the machine speed, load regime, and failure severity. Finally, it is pointed out which methods have the best characteristics regarding the fault diagnosis by demagnetization of the permanent magnets for the studied machine, evaluation of the neutral voltage, and current prediction errors.