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Статті в журналах з теми "Multiphase electrical machine"
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Gutierrez-Reina, Daniel, Federico Barrero, Jose Riveros, Ignacio Gonzalez-Prieto, Sergio Toral, and Mario Duran. "Interest and Applicability of Meta-Heuristic Algorithms in the Electrical Parameter Identification of Multiphase Machines." Energies 12, no. 2 (January 19, 2019): 314. http://dx.doi.org/10.3390/en12020314.
Повний текст джерелаАнотація:
Multiphase machines are complex multi-variable electro-mechanical systems that are receiving special attention from industry due to their better fault tolerance and power-per-phase splitting characteristics compared with conventional three-phase machines. Their utility and interest are restricted to the definition of high-performance controllers, which strongly depends on the knowledge of the electrical parameters used in the multiphase machine model. This work presents the proof-of-concept of a new method based on particle swarm optimization and standstill time-domain tests. This proposed method is tested to estimate the electrical parameters of a five-phase induction machine. A reduction of the estimation error higher than 2.5% is obtained compared with gradient-based approaches.
2
Caruso, Massimo, Antonino Oscar Di Tommaso, Fabrizio Marignetti, and Rosario Miceli. "A General Investigation on the Differential Leakage Factor for Symmetrical and Asymmetrical Multiphase Winding Design." Energies 13, no. 20 (October 16, 2020): 5414. http://dx.doi.org/10.3390/en13205414.
Повний текст джерелаАнотація:
This work provides an investigation based on a fast estimation of the degree of unbalance (D.U.%) and the differential leakage factor (σ0) of multiphase electrical machine windings. This analysis is carried out by exploring almost 5000 combinations in terms of number of slots, pole pairs, phases and layers. The variability of the leakage factor is examined for each condition, defining an optimal region for its minimization. As a result, an extended mapping is carried out for both the degree of unbalance and the leakage factor, providing a useful tool during the early design stage of winding configurations for multiphase electric machines, even with slight asymmetries. The results obtained from this investigation are validated through finite element analysis and demonstrate that the differential leakage factor can be significantly reduced by adopting winding configurations with slight asymmetries, which also represent a valuable alternative in the electrical machine design.
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Laksar, Jan, Radek Cermak, and Karel Hruska. "Challenges in the Electromagnetic Design of Multiphase Machines: Winding and Equivalent Circuit Parameters." Energies 14, no. 21 (November 4, 2021): 7335. http://dx.doi.org/10.3390/en14217335.
Повний текст джерелаАнотація:
The usage of multiphase electrical drives expands the operation possibilities of electrical machines and opens new directions of research on inverter-fed electrical machines. With an increasing number of phases, the standard approach of the electromagnetic design of machines has to be generalized to m-phase systems, which is not usually respected in the literature focused on electric machine design, and it is rarely published. This paper summarizes the specific problems linked with the design of machines with different numbers of phases, focusing on the winding design and the calculation of equivalent circuit parameters. In addition to the direct effect of different numbers of phases, the impact of injecting higher order time harmonic components on the electromagnetic design of electric machines is analyzed. The obtained analytical results are verified by the measurement of a nine-phase experimental induction motor.
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Zhu, Ziqiang, Shensheng Wang, Bo Shao, Luocheng Yan, Peilin Xu, and Yuan Ren. "Advances in Dual-Three-Phase Permanent Magnet Synchronous Machines and Control Techniques." Energies 14, no. 22 (November 10, 2021): 7508. http://dx.doi.org/10.3390/en14227508.
Повний текст джерелаАнотація:
Multiphase electrical machines are advantageous for many industrial applications that require a high power rating, smooth torque, power/torque sharing capability, and fault-tolerant capability, compared with conventional single three-phase electrical machines. Consequently, a significant number of studies of multiphase machines has been published in recent years. This paper presents an overview of the recent advances in multiphase permanent magnet synchronous machines (PMSMs) and drive control techniques, with a focus on dual-three-phase PMSMs. It includes an extensive overview of the machine topologies, as well as their modelling methods, pulse-width-modulation techniques, field-oriented control, direct torque control, model predictive control, sensorless control, and fault-tolerant control, together with the newest control strategies for suppressing current harmonics and torque ripples, as well as carrier phase shift techniques, all with worked examples.
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Muc, Adam, Marcin Morawiec, and Filip Wilczyński. "Steady-State Vibration Level Measurement of the Five-Phase Induction Machine during Third Harmonic Injection or Open-Phase Faults." Energies 16, no. 2 (January 11, 2023): 838. http://dx.doi.org/10.3390/en16020838.
Повний текст джерелаАнотація:
Multiphase electric machines are increasingly used in various industries and for electromobility. Complex systems have been developed for the control and powering of multiphase machines, which require verification. The quality of control and the power supply of electric machines is usually evaluated by analyzing various electrical parameters. On the other hand, taking into account the fact that a motor is an electrical-mechanical object, its full diagnostics should also include the analysis of vibration signals to verify the operation of the motor as a mechanical device. In this paper, a sensorless control algorithm was studied and applied to a 5-phase induction motor. Various scenarios were considered; in particular, the operation of the studied motor in the absence of one or two phases and in the case of the introduction of the third harmonic to increase the torque was analyzed. In the scenarios considered, the motor was connected to another machine and operated with no load as well as with a preset load. The results obtained were analyzed in the time and frequency domain and were related to the standards used.
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Bermúdez, Mario, Federico Barrero, Cristina Martín, and Manuel Perales. "Performance Analysis of Direct Torque Controllers in Five-Phase Electrical Drives." Applied Sciences 11, no. 24 (December 16, 2021): 11964. http://dx.doi.org/10.3390/app112411964.
Повний текст джерелаАнотація:
The industrial application of electric machines has grown in the last decades, thanks to the development of microprocessors and power converters, which have permitted their use as variable-speed drives. Although three-phase machines are the common trend, the interest of the research community has recently focused on machines with more than three phases, known as multiphase machines. The principal reason lies in the exploitation of their advantages in terms of reliability, i.e., post-fault operating capability. Additionally, multiphase machines provide a better current distribution among phases, and lower current harmonic production in the power converter, than conventional three-phase machines. However, multiphase drive applications require the development of complex controllers to regulate the torque (or speed) and flux of the machine. In this regard, direct torque controllers have appeared as a viable alternative due to their easy formulation and high flexibility to incorporate control objectives. However, these controllers face some peculiarities and limitations in their use that require attention. This work aims to tackle direct torque control as a viable alternative for the regulation of multiphase drives. Special attention will be paid to the development of the control technique and the expected benefits and limitations in the obtained results. Case examples based on symmetrical five-phase induction machines with distributed windings in the motoring mode of operation will be used to this end.
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Fleitas, Ariel, Magno Ayala, Osvaldo González, Larizza Delorme, Carlos Romero, Jorge Rodas, and Raul Gregor. "Winding Design and Efficiency Analysis of a Nine-Phase Induction Machine from a Three-Phase Induction Machine." Machines 10, no. 12 (November 28, 2022): 1124. http://dx.doi.org/10.3390/machines10121124.
Повний текст джерелаАнотація:
Multiphase machines are a hot research topic in control theory and industrial applications such as electric cars. However, the availability to buy them in the market is limited or null. For this reason, it is common to rewind it from a three-phase commercial machine. In this context, the aim of this paper is two-fold. First, to introduce a straightforward procedure to rewind a nine-phase induction machine from a three-phase one. For that purpose, a study of the three-phase induction motor was performed, which included selecting a new winding design, calculating stator coils, and simulating tests with ANSYS Maxwell software to validate the design. Secondly, a performance analysis comparing the power losses through experimental tests performed to obtain the electrical parameters of both nine-phase and three-phase topologies is presented.
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Panteleev, S. V., A. N. Malashin, and A. E. Kaleda. "Development of a vector control system of the semiconductor converter, which will provide a polyharmonic operating mode of a polyphase electric machine." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 3 (October 21, 2020): 332–40. http://dx.doi.org/10.29235/1561-8358-2020-65-3-332-340.
Повний текст джерелаАнотація:
A system for vector control of current in the circuit of a polyphase electric machine has been developed. For this, on the basis of the analysis of electromagnetic processes in a multiphase semiconductor converter of electrical energy, its discrete mathematical model was created, which takes into account the redistribution of electromagnetic energy by individual spatial harmonic components depending on the number of phases. Using this mathematical model and the scheme of injection of higher current harmonics, which provides a polyharmonic mode of operation of a semiconductor converter, a method for independent control of the spatial harmonic components of the input current of the converter has been developed. The formation in each of the phases of polyharmonic currents, conjugated in shape and phase with the voltage supplying the converter, is carried out by means of control actions in the form of voltage vectors of a semiconductor switch, the implementation of which is carried out by the method of multiphase space-vector modulation. To check the developed provisions, a simulation model of a nine-phase semiconductor converter of electrical energy with a vector control system was created. The results of the study of the model confirmed the adequacy of the developed technical solutions, the use of which will ensure the most complete realization of the own advantages of a multiphase electric machine in order to generally improve the weight, size and energy indicators of the autonomous power supply system.
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Vikharev, D. Yu, and N. A. Rodin. "Model of implicit pole electric machine based on mathematical formulation of magnetic field in air gap." Vestnik IGEU, no. 6 (December 28, 2021): 27–37. http://dx.doi.org/10.17588/2072-2672.2021.6.027-037.
Повний текст джерелаАнотація:
When modeling transient processes in electric power systems, the issue of designing reliable models of electrical machines is of great interest. The most difficult task is to design the models of synchronous and asynchronous machines. The purpose of the project is to develop mathematical models of synchronous and asynchronous machines based on a generalized model of an implicit-pole machine that considers the change of rotor speed, geometric shapes, and the type of rotor and stator windings. Methods of mathematical modeling of electromagnetic fields in the air gap based on Maxwell equations and methods of the theory of electrical circuits are applied. A system of nonlinear differential equations is considered as a mathematical model of a generalized implicit-pole machine. The key assumption made is the high magnetic permeability of the stator and rotor cores. Technical data of real electric machines have been used for verification. Mathematical models of an implicit pole synchronous machine and an asynchronous machine with a phase rotor have been developed. These models can be used to analyze transient processes in the aggregate without dividing them into electromagnetic and electromechanical ones. The novelty of the models is the fact of non-sinusoidal distribution of the magnetic field in the air gap, various types of multiphase AC windings and rejecting the principle of constant rotation frequency at the time step of the simulation. The proposed mathematical models can be used to solve design problems, to analyze the modes of electric power systems, the operation of relay protection and automation of electric power facilities, and emergency automation. In the future, the equations that consider the influence of the damper circuits and the peculiarities of the windings will be added to the developed mathematical models. The purpose of further research is to develop models of salient-pole synchronous machines and asynchronous machines with a squirrel-cage rotor.
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Akay, Ali, and Paul Lefley. "Torque Ripple Reduction Method in a Multiphase PM Machine for No-Fault and Open-Circuit Fault-Tolerant Conditions." Energies 14, no. 9 (May 2, 2021): 2615. http://dx.doi.org/10.3390/en14092615.
Повний текст джерелаАнотація:
This paper presents a method that has been developed to reduce the torque ripples under healthy and open-circuit fault-tolerant (OCFT) conditions for a multiphase permanent magnet (PM) machine. For smooth torque, both the phase current and the back electromotive force (back-EMF) should be purely sinusoidal. To improve the torque in a multiphase machine, higher-order current harmonics are injected, which are related to the harmonics in the back-EMF. For this reason, generally, multiphase machines are designed with higher-order back-EMF harmonics. However, these harmonics produce ripples in the torque. In light of this, a torque ripple cancellation method has been developed that first determines an additional current component from the harmonic content of the back-EMF and then injects these additional components to cancel the torque ripple. It has been found that this new torque ripple cancellation method works for both faultless and faulty conditions in a five-phase PM machine. The method has been validated using Finite Element Analysis, and the results are presented in this paper.
Дисертації з теми "Multiphase electrical machine"
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Gule, Nkosinathi. "Analysis and evaluation of brush-DC equivalent controlled multiphase cage induction machine drive." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6489.
Повний текст джерелаАнотація:
Thesis (PhD (Electrical and Electronic Engineering))--University of Stellenbosch, 2011.ENGLISH ABSTRACT: The multiphase induction machine drive has been under investigation for the last half century. Although it offers several attractive advantages over the conventional three-phase induction machine drive, it is restricted to highly specialised applications. One aspect of the multiphase induction machine drive is the complexity of the control algorithm for decoupled flux and torque control. The complexity, arising from the required coordinate transformations, increases with increase in the number of phases of the machine. Recently, a method that allows the control of a six-phase induction machine drive without any coordinate transformations was developed and tested. This new control technique allows the control of the machine to be similar to that of dc machines through the use of special trapezoidal-shaped stator current waveforms. These stator phase current waveforms consist of field (flux) and torque current components, with flat-topped amplitudes allowing a stator phase to act alternately in time as either a flux or a torque producing phase. The idea is to have a number of stator phases acting as flux producing phases, whilst the remaining phases act as torque producing phases at each time instance. This dissertation takes a further step in the research on this particular control technique. As the control method relates directly to the brush-dc machine operation, in this dissertation, the control method is defined as a “brush-dc equivalent” (BDCE) control method. First, in this dissertation, a simple analytical method is developed to determine a defined optimal ratio of the number of field to the number of torque phases of a multiphase induction machine that utilises trapezoidal stator current waveforms. The method is applied to induction machines with up to fifteen stator phases. Finite element analysis is used to verify the validity of the developed criterion and to verify the square-like air gap flux density. Secondly, in this dissertation, an analytical method for predicting and evaluating the rotor bar current waveform of a cage multiphase induction machine is proposed. The method is based on the Fourier transform and the winding function theory under linear condition assumptions. The method also allows for the calculation of the electromagnetic torque and rotor bar losses. Skin effect is considered in the calculation of the rotor bar resistance of the machine. Again, finite element analysis is used to verify the analytically calculated results. The developed method can be expanded and used to evaluate the rotor current waveform of any multiphase induction machine supplied with any stator current waveforms. The BDCE control method is implemented on a prototype nine-phase cage-rotor induction machine drive. A nine-phase inverter and control system are developed for supplying the nine-phase induction machine with the trapezoidal stator current waveforms. Rotor current waveform measurements are taken on a specially designed rotor to verify the analytically predicted waveform. The linear relationship of the developed torque and torque current of the proposed BDCE control method is verified through measurements. Through the comparison of analytical calculated results with finite element calculated and measured results, it is shown in this dissertation that the developed analytical techniques can be used in the design and performance analysis of multiphase induction machines. Also, from the results, it is clear that the new control technique works remarkably well even in the flux weakening region. However, outstanding aspects, such as efficiency and generated torque quality of the proposed drive still need to be investigated further.
AFRIKAANSE OPSOMMING: Die multifase induksiemasjien aandryfstelsel word in die laaste halwe eeu al in navorsing ondersoek. Alhoewel dit verskeie aantreklike voordele bied bo die konvensionele driefase induksiemasjien aandryfstelsel, is dit beperk tot hoogs gespesialiseerde aanwendings. Een aspek van die multifase induksiemasjien aandryfstelsel is die kompleksiteit van die beheer algoritme vir ontkoppelde vloed en draaimoment beheer. Die kompleksiteit, wat voortspruit uit die vereiste koördinaat transformasies, neem toe met toename in die aantal fases van die masjien. Onlangs is 'n metode wat die beheer van ’n sesfase induksiemasjien sonder enige koördinaat transformasies doen, ontwikkel en getoets. Hierdie nuwe beheertegniek maak die beheer van die masjien soortgelyk aan dié van GS masjiene deur die gebruik van spesiale trapezium-vormige statorstroom golfvorms. Hierdie stator fasestroom golfvorms bestaan uit veld- (vloed-) en draaimoment-stroom komponente met plat amplitudes, sodat 'n statorfase om die beurt in tyd optree as óf' ’n vloed of 'n draaimoment genereerde fase. Die idee is om 'n aantal statorfases te hê wat as vloed genereerde fases dien, terwyl die oorblywende fases as draaimoment genereerde fases optree op enige tydstip. Hierdie tesis neem 'n verdere stap in die navorsing op hierdie spesifieke beheertegniek. Met die beheermetode wat direk verband hou met borsel-GS masjien werking, word in hierdie proefskrif die beheermetode as 'n "borsel-GS ekwivalente" ["brush-DC equivalent" (BDCE)] beheermetode gedefinieer. In die eerste plek word in hierdie proefskrif 'n eenvoudige analitiese metode ontwikkel om ’n gedefinieerde optimale verhouding van die aantal veld tot die aantal draaimoment fases van 'n multifase induksiemasjien te bepaal, wat van trapesoïdale statorstroom golfvorms gebruik maak. Die metode word toegepas op induksiemasjiene met tot vyftien statorfases. Eindige element analise is gebruik om die geldigheid van die ontwikkelde kriterium te verifieer en om die vierkantvormige luggaping vloeddigtheid te verifieer. In die tweede plek word in hierdie proefskrif 'n analitiese metode vir die voorspelling en evaluering van die rotorstaafstroom golfvorm van 'n kourotor multifase induksiemasjien voorgestel. Die metode is gebaseer op die Fourier transform en die wikkelingsfunksie teorie onder lineêre-toestand aannames. Die metode wend hom ook daartoe tot die berekening van die elektromagnetiese draaimoment en rotorstaafverliese. Die huideffek word in ag geneem in die berekening van die rotorstaafweerstand van die masjien. Weereens is eindige element analise gebruik om die analitiese berekende resultate te verifieer. Die ontwikkelde metode kan uitgebrei en gebruik word om die rotorstroom golfvorm van van enige multifase induksiemasjien te evalueer wat gevoer word met enige statorstroom golfvorms. Die BDCE beheermetode is toegepas op 'n prototipe negefase kourotor induksiemasjien. 'n Negefase omsetter en beheerstelsel is ontwikkel vir die toevoer van die trapesoïdale statorstroom golfvorms aan die negefase induksiemasjien. Die rotorstroomgolfvorm metings is geneem op 'n spesiaal ontwerpte rotor om die analitiese voorspelde golfvorm te verifieer. Die lineêre verwantskap tussen die ontwikkelde draaimoment en draaimomentstroom van die voorgestelde BDCE beheermetode is geverifieer deur metings. Deur die analitiese berekende resultate met die eindige element berekende en gemete resultate te vergelyk, wys hierdie proefskrif dat die ontwikkelde analitiese tegnieke gebruik kan word in die ontwerp en werkverrigting analise van ’n multifase induksiemasjien. Vanuit die resultate is dit ook duidelik dat die nuwe beheertegniek besonder goed werk, selfs in die vloedverswakking spoedgebied. Egter, uitstaande aspekte soos effektiwiteit en genereerde draaimoment kwaliteit van die voorgestelde aandryfstelsel moet nog verder ondersoek word.
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Zabaleta, M. "Permanent magnet multiphase machine modeling and control for MV wind energy applications." Thesis, Liverpool John Moores University, 2018. http://researchonline.ljmu.ac.uk/8818/.
Повний текст джерелаАнотація:
Due to the rapid development of the power electronics in the second half of the twentieth century, a significant research effort has been put into the modelling of electrical machines to provide mathematical models for control purposes. As the power electronics isolate the machine from the grid, the number of phases on both sides no longer needs to be the same, thus allowing for use of multiphase machines. Several studies have shown that multiphase machines can yield lower torque ripple, provide higher torque per phase current, and that they can continue to operate with one or more faulty phases, thus increasing the robustness of the power stage. This, amongst other benefits, has led to increased interest in multiphase machine employment for critical applications, such as more-electric aircraft, electrical propulsion systems for ships and offshore wind, etc. Amongst the different multiphase machine constructions, the multiple three-phase winding structure with isolated neutral points is of special interest. It can be operated using multiple three-phase converters, so that almost no modification of hardware is needed. Furthermore, with high power machines (above the 5 MW class), several converters in parallel should be used when increased availability is desired. This is where multiple three-phase winding machines show an additional benefit, galvanic isolation between the windings. By connecting one three-phase converter to each of the three-phase windings of the machine, the increased availability of paralleling converters is obtained while the problem of the circulating current between paralleled converters is practically eliminated thanks to said galvanic isolation. The control schemes of three-phase machines should not be directly applied to multiple three-phase winding machines, since these show internal cross couplings between the different three-phase windings that may affect dynamic performance. To examine the behaviour and design control schemes for multiple three-phase winding machines, modelling approaches based on vector space decomposition, multiple dq modelling approach and a novel approach, specifically developed in this thesis for the independent power flow control in individual three-phase windings, are studied. It is demonstrated that, by including appropriate decoupling terms in the traditional three-phase control structure, a completely decoupled operation can be obtained in all the three-phase windings in the machine when control scheme is based on the multiple dq modelling approach. With this control approach, the control of these machines is accomplished using control structures and model transformations familiar to those skilled in the art of the three-phase machines. For six-phase machines the existing transformations are sufficient for all control purposes, while the novel transformation becomes a useful tool when there are three or more three-phase windings. The influence of a low switching to fundamental frequency ratio on behaviour of the controlled object is also covered in this work. This has a great impact on the modelling of current control loops, especially when using the synchronously rotating reference frame in variable fundamental frequency applications, such as motor drives. The precise modelling of the actual control loops is of vital importance since it allows development of faithful control tuning techniques. With these, the regulator parameters, which ensure certain specified dynamic performance of the loops, are obtained and their behaviour can be precisely described and predicted by simulations. The machine’s parameter identification has also been approached in this work; accurate parameter knowledge is of essential importance to ensure the correct match between experimental and simulation results. All the experimental work has been done using a 150 kW permanent magnet synchronous generator in six-phase configuration with two three-phase winding placed spatially in phase. Unequal power sharing between different three-phase windings is studied further, including the simultaneous operation of one winding in motoring and the other in generation for a six-phase machine. This particular mode of operation has been found as very useful in development of a novel testing method for the machines with multiple three-phase windings, of synthetic loading type, which is fully verified by experimentation. A corresponding theoretical/simulation work has been performed for a nine-phase (triple three-phase) machine.
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RUBINO, SANDRO. "High Performance Control Techniques for Multiphase eDrives." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2732871.
Повний текст джерела
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Castañeda, Jimenez German Efrain 1988. "Simulação do controle de escoamento multifásico em uma bomba centrífuga submersa - BCS : Simulation control of multiphase flow an electrical submersible pump - EPS." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265922.
Повний текст джерелаАнотація:
Orientador: Janito Vaqueiro FerreiraDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-24T20:57:24Z (GMT). No. of bitstreams: 1 CastanedaJimenez_GermanEfrain_M.pdf: 6173136 bytes, checksum: 10447f1e90575f51111560bad8f24df0 (MD5) Previous issue date: 2014
Resumo: Na indústria do petróleo é comum à utilização de bombas centrífugas submersas (BCS) operando em escoamento multifásico líquido-gás. A presença de elevadas vazões de gás causam uma degradação severa no desempenho da bomba, gerando instabilidades nas curvas de pressão-vazão, como o `surging¿ e o `gas locking¿. Portanto o conhecimento destas instabilidades é fundamental para a adequada operação da bomba e assim evitar falhas prematuras no equipamento. Na atualidade não existem modelos matemáticos que representem de forma adequada o comportamento da BCS na região de `surging¿ e no `gas locking¿, gerando a necessidade de empregar circuitos de testes para fazer o levantamento das curvas de desempenho das bombas. A maioria dos circuitos de testes é operada de forma manual para obter às condições de operação da bomba, tornando os ensaios repetitivos, cansativos e trabalhosos. Por isto nasce a necessidade de automatizar estas bancadas com a finalidade de facilitar o processo do levantamento das curvas de desempenho das bombas. Este trabalho apresenta o projeto e simulação de um controle robusto tipo H_? que permita manter o escoamento multifásico na entrada de uma BCS em diferentes condições de operação da bomba. Este controlador é projetado a partir de um circuito de testes para BCS virtual que é modelado empregando formulações físicas e modelos ajustados mediante dados experimentais usando algoritmos de aprendizagem de máquinas baseados em máquinas de suporte vetorial para regressão (SVMr). Após o projeto de controle, o controlador projetado é testado no circuito de testes virtual mediante simulações em tempo real `software in the loop¿ (SIL)
Abstract: In the oil industry, it is common to use electrical submersible pumps (ESP) operating with gas -liquid multiphase flow. The presence of high gas flows cause severe degradation in performance of the pump, generating instabilities in the flow-pressure curves, as "surging" and "gas locking". Therefore knowledge of these instabilities is essential for the proper functioning of the pump and thereby prevents premature failure of the equipment. Currently there are no mathematical models that adequately represent the behavior of the EPS in the region of "surging" and "gas locking", creating the need to use test circuits to make a study of the performance curves of the pumps. Most test circuits are operated manually to reach the operating conditions of the pump, making repetitive, tedious and laborious trials. Therefore there is a need to automate these circuits in order to facilitate the process of obtaining the performance curve of the pump. In this paper the project and simulation of a robust control type H_? for keeping the multiphase flow in the entrance of a EPS operating at different conditions is performed. This controller is designed based on a test circuit virtual for EPS which is modeled using physical formulations and adjusted models obtained by experimental data using machine learning algorithms based on support vector machines for regression (SVMR). After the controller design, the control is tested in the virtual test circuits using simulations in real time "software in the loop" (SIL)
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
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Montalba, Mesa Raimundo. "Online Parameter Estimation of a Six- Phase Machine for Marine Application." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302108.
Повний текст джерелаАнотація:
In the recent decades, an increased interest into multiphase machines has developed due to certain beneficial properties they have over the standard three- phase machines. Proper modelling of a multiphase machine allows access to higher degrees of freedom given by the ability to control higher order harmonic frames. This feature is of particular interest in the area of parameter estimation as it may provide an opportunity to implement methods that are not feasible in three- phase machines. Modelling of a real six- phase machine meant for marine application with a functioning control structure is carried out on MATLAB/Simulink; considering nonlinear relations, cross coupling and saturation effects, the model includes the machine’s behavior in the fundamental frame as well as the next two higher order harmonic frames. Stator resistances and permanent magnet flux linkage are estimated online and simultaneously during various operating points. It is shown that stator resistance may be accurately estimated by means of DC test signal injections into the highest order harmonic frame; thus, minimizing torque ripple and additional loss generation. Permanent magnet flux linkage is accurately estimated via reactive power calculations on the fundamental frame which remains undisturbed by the aforementioned test signals.Under de senaste decennierna har intresset för flerfasmaskiner ökat, på grund av i vissa avseenden, fördelaktiga egenskaper i jämförelse med traditionella trefasmaskiner. En väl genomförd modellering av flerfasmaskiner möjliggör högre grader av frihet givet förmågan att kontrollera frekvensplan av högre ordning. Denna funktion är av särskilt intresse inom parameteruppskattning, då det kan ge möjligheter att implementera metoder som är omöjliga i trefas maskiner. En modell av en verklig sexfasmaskin, byggd för en marin tillämpning och med ett givet styrsystem, har skapats i MATLAB/Simulink. Modellen tar hänsyn till ickelinjära förhållanden, korskopplingar och mättning. Den inkluderar även maskinens egenskaper i det fundamentala frekvensplanet och de två nästkommande frekvensplanen av högre ordning. Statorresistansen och permanentmagneternas sammanlänkade flöden uppskattas i realtid för olika driftsförhållanden. Det visar sig att statorresistansen kan uppskattas noggrant genom inmatning av en DC testsignal i högsta ordningens frekvensplan vilket minimerar momentrippel och extra förluster. Permanentmagneternas flöden kan uppskattas noggrant genom beräkning av den reaktiva effekten i det fundamentala frekvensplanet som är opåverkat av de ovan nämnda testsignalerna.
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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 джерелаАнотація:
Transportation electrification has experienced a significant growth in recent years, and the electrification of the powertrain – namely hybridization – is considered the most viable solution seen by car manufacturers to achieve the challenging emission targets. Among the hybrid electrical powertrain topologies, the mild-hybrid configuration with the 48 V battery system offers the best ratio cost versus CO2 improvements. In particular, the 48 V technology does not require electrical shock protection whilst allows to leverage a variety of fuel saving functions such as electrical boost and regenerative braking.
The thesis is focused on the electromagnetic and thermal design of a Belt-driven Starter Generator, BSG, for 48 V mild-hybrid powertrains. In the BSG layout, the starter-generator replaces the conventional alternator with a low impact on the engine compartment layout, even if a redesign of the belt tensioner is required.
It is noteworthy to keep in mind that the electrical machine shall provide high starting torque and wide constant power speed range, both in motor and generator mode. Furthermore, the application imposes the adoption of low cost materials and the electrical machine is located in a harsh environment. As a consequence, the design is challenging from the electromagnetic, thermal and mechanical point of view.
The novelties of the research lie in the 48 V automotive applications, by describing the practical difficulties to fulfill the design specifications through a suitable material selection, the identification of the cooling system and the available technological solutions.
The first section of the thesis reports results from a literature review on electrical machine for mild-hybrid application aiming to highlight different criteria for the selection of the electrical machine. In this context the advantages in terms of fault tolerance and stator current splitting of multiphase drives are investigated. Furthermore, in this section the required performances and the constraints imposed by the specific application are analyzed.
Among the different motor technologies, a dual three-phase induction machine having two stator winding sets shifted by 60 electrical degrees is selected as a suitable candidate.
The second part of the thesis reports electromagnetic and mechanical issues addressed during the design stage, with special focus on stator winding layout, pole number and rotor slot. The adopted six-phase machine uses a four-layer bar stator winding that has been demonstrated as a good solution to improve the slot fill factor and thermal behavior. In addition, the thesis reports a comparison supported by experimental tests between open and closed rotor slots solutions; the focus is to maximize the machine electromagnetic performance according to the mechanical limits imposed by the rotating speed.
Finally, predicted and measured performance of the prototypes are reported and discussed for validation purposes.
The third part of the thesis deals with the thermal assessment of the BSG with particular emphasis on accurate winding temperature prediction as well as the cooling system selection. Since the stator-winding region is very sensitive to thermal issues and is usually attributed as being the main heat source within the machine body, its thermal modeling is of major importance. In these regards, a simplified stator winding thermal model was developed for the temperature prediction during transient condition. Moreover, considering that the driving cycle is characterized by time variable loss distribution, an effective cooling system must be mandatorily adopted together with high temperature class insulation material. In this context, the development of heat extraction through forced convection is experimentally investigated on the BSG prototype.
As a main outcome of this research activity, it has been demonstrated the feasibility of the proposed design solution with respect to electromagnetic and thermal requirements.
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Subotić, Ivan. "Integrated on-board battery chargers for EVs based on multiphase machines and power electronics." Thesis, Liverpool John Moores University, 2015. http://researchonline.ljmu.ac.uk/4526/.
Повний текст джерелаАнотація:
The concept of integration of an electric vehicle (EV) drivetrain’s components into the charging process is not novel. It has been considered over the years in both industry and academia, which resulted in a number of published papers and patents in this area. Possibilities of charging from single-phase and three-phase mains were both considered. In the former group the charging power rating cannot exceed the limit set by the single-phase mains. Therefore, the topologies are characterised with low charging powers, leading to a long duration of the charging process. Although the topologies supplied form three-phase mains are capable of achieving fast charging, they were considered to a much lesser extent. The main reason is the undesirable torque production in machines integrated into the charging process during the battery charging, which is unavoidable when a three-phase machine of either synchronous or induction type is used. The thesis investigates integrated on-board battery chargers for electric vehicles (EVs) based on multiphase machines and multiphase power electronics. At present, EVs rely on three-phase systems for machine propulsion. However, recent advances in multiphase drive technology have firmly established their potential advantages over their three-phase counterparts for this application. One of the most notable features of multiphase drive systems is their excellent fault tolerance, which is highly desirable in EVs since it enables realisation of the requirement for “limp-home” operation in the propulsion mode, in case of a fault. The thesis demonstrates that multiphase drives have an additional major advantage over three-phase systems in vehicular applications, which is related to the aspect of battery charging. It shows a clear superiority of multiphase over three-phase systems in designing integrated charging topologies for EVs. In order to support the statement, the thesis provides a multitude of novel charging solutions that incorporate multiphase machines and multiphase power electronics into the charging process. The developed solutions could contribute to achieve significantly faster and cost-free (or at a minimum additional cost) on-board chargers in the near future. The thesis demonstrates how additional degrees of freedom that exist in multiphase systems can be conveniently utilised to achieve torque-free charging operation. Therefore, although three-phase currents flow through machines’ stator windings, they are not capable of producing a torque; thus the machines do not have to be mechanically locked. The principal advantage is that either very few or no new elements are required in order to realise the charging process. Thus savings are made with regard to cost and weight, and available spare space in the vehicle is increased. The novel integrated charging solutions, developed in the thesis, are based on primarily five-phase, asymmetrical and symmetrical six-phase, and asymmetrical and symmetrical nine-phase systems. Solutions with other phase numbers are also considered. Thus, in essence, all the possible phase numbers are encompassed by the research and the solutions are valid for both induction and synchronous machines. A common attribute of all discussed topologies is that they do not require a charger as a separate device since the charging function is performed by the drivetrain elements, predominantly a multiphase machine and an inverter. Further, each topology is capable of operating in both charging and vehicle-to-grid (V2G) mode. Three types of voltage sources are considered as a power supply for the charging process, namely single-phase, three-phase, and multiphase. For each supply type, and each phase number, viability of torque-free charging operation is theoretically assessed. Mathematical models of multiphase rectifiers are developed. For each topology equivalent scheme in the charging/V2G mode of operation is constructed. A control scheme, which aims at achieving unity power factor operation and complete suppression of the low order grid current harmonics, is designed for each solution. Finally, the validity of theoretical considerations and control algorithms for the developed solutions is experimentally assessed in charging, V2G, and propulsion mode of operation. Experimental performances of all discussed topologies are compared, and advantages and shortcomings of each solution are identified and discussed.
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Tessarolo, Alberto. "Modeling and analysis of multiphase machines for high power applications." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421670.
Повний текст джерелаАнотація:
This doctoral thesis is dedicated to the modeling and analysis of high-power multiphase electric machines.
In the first part, the multiphase technology and variety in the field of high power electric drives and power generation is illustrated by means of some significant industrial realizations which highlight the main design issues and advantages that may lead to choose a high number of phases in large electric machinery.
Subsequently, the attention is focused on the so called split-phase configurations, characterized by stator windings split into *N* three-phase sections. The modeling of these machines is revisited from an analytical viewpoint and an equivalent circuit representation is proposed for them; in particular, it is shown and experimentally proved that, when the number of stator sections *N* exceeds two, a magnetic cross-coupling arises between d-axis and q-axis equivalent circuits.
A different modeling technique, called Vector-Space Decomposition (VSD), is then considered and extended to any kind of multiphase configuration, whether symmetrical or asymmetrical, through suitable geometrical transformations. A special effort is particularly spent on setting forth a general methodology which allows for space harmonics (related to the
non-idealities of air-gap shape and winding distribution) to be included in the machine model through VSD. The result achieved is that some geometry- or design-related machine information which usually require finite-element simulations to be caught, can be successfully incorporated in the VSD lumped-parameter model of the *n*-phase machine, to an extent that is larger
and larger as *n* grows. As an application example, it is shown how space harmonic effects in the operation of a six-phase and a nine-phase salient-pole multiphase machines can be reproduced by time-stepping finite-element analysis and by the proposed lumped-parameter methodology with the same level of accuracy but with a significant time and computational saving in the last mentioned case.
A part of the thesis is also dedicated to model parameter calculation.
Addressing the case of a general number and distribution of stator phases, algorithms are proposed to compute magnetizing parameters through the winding function theory and analytical computation methods are proposed for self and mutual leakage inductance parameters. The accuracy of the proposed
computation method is assessed by comparison with measurements or real machines.
The final part of the thesis is devoted to the study of two detailed
phenomena which characterize high-power multiphase machines when supplied by multiple inverters. In the instance of multiple current-source inverters, a model is proposed and validated to describe commutation transients including the mutual interaction effects between different winding sections. In the instance of multiple voltage-source inverters, the low-frequency current
circulation phenomenon is investigated analytically and experimentally showing how it arises due to the internal non-ideal machine structure.Questa tesi di dottorato tratta della modellizzazione ed analisi di machine multiphase di alta potenza. Nella prima parte, si illustra la tecnologia multifase e la varietà delle sue forme progettuali nel campo degli azionamenti elettrici e della generazione di energia elettrica. Nella descrizione, si fa riferimento ad alcune realizzazione industriali significative che mettono in luce le principali problematiche e vantaggi che possono indurre alla scelta di una configurazione multifase in macchie elettriche di grossa taglia. Successivamente, viene trattata una particolare configurazione multifase detta “split-phase”, propria di quelle macchine il cui avvolgimento statorico è suddiviso in *N *sezioni multifase. La modellizzazione di queste macchine è rivisitata da un punto di vista analitico e ne viene fornita una rappresentazione in termini di circuito equivalente; in particolare, si dimostra teoricamente e sperimentalmente che, quando il numero *N* di sezioni statoriche è maggiore di due, si verifica un accoppiamento magnetico tra i circuiti equivalenti di asse diretto e di asse in quadratura. Successivamente, si considera una diversa tecnica di modellizzazione, chiamata Vector-Space Decomposition (VSD), con l’intento di darne una formulazione estesa che si applica trattare ogni tipo di configurazione multifase, sia simmetrica che non, ricorrendo ad opportune trasformazioni geometriche. Particolare attenzione è dedicata alla formulazione di un metodo generale che consente l’inclusione, nel modello della macchina con tecnica VSD, delle armoniche spaziali dovute alla non-idealità della geometria del traferro e della distribuzione degli avvolgimenti. In risultato che ne consegue è la possibilità di incorporare nel modello a parametri concentrati della macchina *n*-fase, realizzato con metodo VSD, alcune informazioni, legate alla geometria e al progetto di dettaglio della macchina, le quali normalmente possono essere tenute in considerazione mediante approcci di simulazione agli elementi finiti. La quantità di informazioni includibile nel modello a parametri concentrati secondo la tecnica proposta si mostra essere tanto maggiore quanto più grande è il numero di fasi *n*. Come esempio di applicazione, si mostra come gli effetti legati alle armoniche spaziali nel funzionamento di una macchina a poli salienti a 6 fasi e a 9 fasi possano essere riprodotti, mediante analisi agli elementi finiti nel dominio del tempo e mediante il metodo a parametri concentrati proposto, con lo stesso livello di accuratezza ma con un significativo risparmio di tempo e di risorse computazionali in quest’ultimo caso. Una parte della tesi è altresì dedicata al calcolo parametrico dei modelli. Riferendosi al caso di numero e distribuzione generici delle fasi di statore, vengono proposti algoritmi di calcolo dei parametri di magnetizzazione basati sulla teoria basata sulle “winding functions” e metodi di calcolo analitici per i parametri di auto e mutua induttanza dispersa. L’accuratezza dei metodi di calcolo proposti è verificata per confronto con misure su macchine reali. La parte finale della tesi è dedicata allo studio di due fenomeni dettagliati che caratterizzando le macchine elettriche multifase alimentate da più invertitori. Con riferimento all’alimentazione da più invertitori a corrente impressa, viene proposto e validato un modello che descrive i transitori di commutazione tenendo conto degli effetti di mutua interazione tra diverse sezioni dell’avvolgimento. Nel caso di alimentazione da più invertitori a tensione impressa, viene indagato analiticamente e sperimentalmente il fenomeno di correnti armoniche di ricircolo tra le fasi a bassa frequenza, dimostrando come esso si verifichi a causa della struttura interna non-ideale della macchina.
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Cordovil, Paulo Torres de Carvalho. "Modelagem e aspectos construtivos de geradores síncronos multifásicos para turbinas eólicas offshore." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-16072018-110020/.
Повний текст джерелаАнотація:
Neste trabalho desenvolve-se uma análise sobre o estado da arte e tendências para projeto de geradores elétricos em turbinas eólicas offshore. A conjunção dos requerimentos de alta confiabilidade e potência, criam condições adequadas para a aplicação de máquina elétricas multifásicas nesse setor. Desta forma, optou-se por estudar as características e condições de projeto de máquinas elétricas multifásicas, simétricas ou assimétricas. Com esta finalidade, os métodos analíticos de projeto de máquinas elétricas trifásicas são revisitados e estendidos, quando necessário, para diferentes configurações multifásicas. O foco do trabalho, consiste em desenvolver e explorar temas de projeto de geradores elétricos multifásicos, síncronos de imãs permanentes, com enrolamentos distribuídos de dupla camada. Para estudo de caso, realiza-se a comparação entre o projeto de quatro topologias diferentes. Nomeadamente, compara-se o projeto de geradores de três, seis, nove e dezoito fases para turbinas eólicas offshore de 10 MW. A configuração com gerador de nove fases apresenta os melhores resultados, com densidade de torque 10,96% superior à densidade de torque desenvolvida pela máquina trifásica analisada. Por fim, a metodologia analítica desenvolvida para o projeto de máquinas elétricas multifásicas é verificada usando o método de elementos finitos bidimensional, para o gerador síncrono de imãs permanentes de nove fases.The state of the art and future trends for offshore wind turbines were reviewed. Due to its fault-tolerant characteristic, multiphase electrical generators were identified as strong candidates to meet the power and resilience targets of the offshore wind sector. In this work, the design aspects of three-phase electrical machines are reviewed and extended to different multiphase configurations. The main focus of the work is to develop an analytical design methodology for multiphase, symmetrical and asymmetrical, synchronous generators with double-layer distributed windings. As a case study, the project of a three-phase, six-phase, nine-phase and eighteen-phase permanent magnet synchronous generators were compared for a 10MW offshore wind turbine. The best results were found for the nine-phase topology, with a torque density 10.96% higher than the torque density of the analysed three-phase machine. The developed design methodology was validated with a finite element analysis of the ninephase permanent magnet generator.
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Bermúdez, guzmán Mario. "Novel control techniques in multiphase drives : direct control methods (DTC and MPC) under limit situations." Thesis, Paris, ENSAM, 2018. http://www.theses.fr/2018ENAM0061/document.
Повний текст джерелаАнотація:
Les entraînements électriques polyphasés ont acquis une importance particulière ces derniers temps pour leur utilisation dans des applications où la fiabilité présente un intérêt pour des raisons économiques et de sécurité. Cette thèse se centre sur le développement de techniques de commande en mode instantané pour contrôler de manière optimale les machines polyphasées, en analysant leur tolérance dans différentes conditions de fonctionnement, telles que lors de l’atteinte de limites électriques (limites de tension, de courant et de niveau maximum de magnétisation) ou de défauts de type phase ouverte. Tout d’abord, la technique DTC est proposée pour gérer le cas de défaut de type phase ouverte dans la machine polyphasée. Une comparaison de la tolérance à la défaillance des commandes de type DTC par rapport à d’autres techniques de commande est réalisée, permettant une conclusion sur les forces et les faiblesses des méthodes analysées. Enfin, un contrôleur de courant optimal est développé utilisant des techniques MPC permettant une utilisation optimale de la capacité de couple du système en cas de limitations électriques. Des résultats de simulation et des validations expérimentales sont effectués pour corroborer les approches initiales, en utilisant des cas particuliers d’entraînements pentaphasés commandés avec différents sous-espaces de commande dans le domaine fréquentielMultiphase drives have gained special relevance in recent times for their use in applications where reliability is of interest for economical and safety reasons. This Thesis focuses on the development of direct control techniques to optimally control multiphase machines, analyzing their tolerance to different limit operating conditions, such as electrical constraints (voltage, current and magnetization level limits) or failure situations such as an open-phase fault. First, the DTC technique is proposed to manage the open-phase fault operation of the multiphase machine. A comparison of the fault-tolerant capability of DTC with other control techniques is carried out, to conclude the strengths and weaknesses of the analyzed methods facing this limit operation. Finally, an optimal current controller is developed using MPC techniques that allows the optimal utilization of the system’s torque capability under electrical limitations. Simulation results and experimental validations are obtained to corroborate the initial approaches, through the use of particular cases of five-phase drives controlled using different frequency-domain control subspaces
Книги з теми "Multiphase electrical machine"
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Al-Adsani, Ahmad S., and Omid Beik. Multiphase Hybrid Electric Machines. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-80435-0.
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Beik, Omid, and Ahmad S. Al-Adsani. Multiphase Hybrid Electric Machines: Applications for Electrified Powertrains. Springer International Publishing AG, 2022.
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3
Beik, Omid, and Ahmad S. Al-Adsani. Multiphase Hybrid Electric Machines: Applications for Electrified Powertrains. Springer International Publishing AG, 2021.
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Loncarski, Jelena. Peak-To-Peak Output Current Ripple Analysis in Multiphase and Multilevel Inverters. Springer, 2014.
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Loncarski, Jelena. Peak-to-Peak Output Current Ripple Analysis in Multiphase and Multilevel Inverters. Springer, 2014.
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6
Loncarski, Jelena. Peak-to-Peak Output Current Ripple Analysis in Multiphase and Multilevel Inverters. Springer, 2014.
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Loncarski, Jelena. Peak-to-Peak Output Current Ripple Analysis in Multiphase and Multilevel Inverters. Springer, 2016.
Знайти повний текст джерелаЧастини книг з теми "Multiphase electrical machine"
1
Al-Adsani, Ahmad S., and Omid Beik. "Electric and Hybrid Electric Powertrains." In Multiphase Hybrid Electric Machines, 143–70. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80435-0_5.
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Al-Adsani, Ahmad S., and Omid Beik. "General Electric Machine Theory." In Multiphase Hybrid Electric Machines, 1–15. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80435-0_1.
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Al-Adsani, Ahmad S., and Omid Beik. "Hybrid Electric Machine Concept." In Multiphase Hybrid Electric Machines, 17–44. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80435-0_2.
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Al-Adsani, Ahmad S., and Omid Beik. "Multiphase HPM Generator Systems." In Multiphase Hybrid Electric Machines, 95–142. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80435-0_4.
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Al-Adsani, Ahmad S., and Omid Beik. "Hybrid Permanent Magnet Machine Design." In Multiphase Hybrid Electric Machines, 45–94. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80435-0_3.
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Al-Adsani, Ahmad S., and Omid Beik. "Operation and Characterization of Multiphase HPM Generator in SHEV Powertrain." In Multiphase Hybrid Electric Machines, 171–206. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80435-0_6.
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Rigatos, Gerasimos. "Control of the Functioning of Multiphase Electric Machines." In Intelligent Renewable Energy Systems, 159–212. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39156-4_4.
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Bojoi, Radu, and Luca Zarri. "Multiphase machine drives." In Modeling, Simulation and Control of Electrical Drives, 579–636. Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/pbce118e_ch16.
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Levi, Emil. "Multiphase AC Machines." In Electrical Engineering Handbook, 1–31. CRC Press, 2011. http://dx.doi.org/10.1201/b10643-6.
Повний текст джерелаТези доповідей конференцій з теми "Multiphase electrical machine"
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Bilyi, Volodymyr, Dmytro Bilyi, Oleg Moros, Gurakuq Dajaku, and Dieter Gerling. "Synchronous reluctance machine with multiphase stator cage winding." In 2017 20th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2017. http://dx.doi.org/10.1109/icems.2017.8056518.
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Cai, M., M. Henke, and W. R. Canders. "Least squares based d-q model of non-ideal multiphase synchronous machine." In 2014 XXI International Conference on Electrical Machines (ICEM). IEEE, 2014. http://dx.doi.org/10.1109/icelmach.2014.6960182.
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Wang, Jin, Libing Zhou, and Ronghai Qu. "Harmonic current effect on torque density of a multiphase permanent magnet machine." In 2011 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2011. http://dx.doi.org/10.1109/icems.2011.6073674.
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Abdel-Khalik, Ayman S., A. Elserougi, S. Ahmed, and A. Massoud. "Vector control of multiphase induction machine under open-circuit phase faults." In 2013 IV International Conference on Power Engineering, Energy and Electrical Drives (POWERENG). IEEE, 2013. http://dx.doi.org/10.1109/powereng.2013.6635611.
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Adil, Waqar Ahmed, Johann S. Mayer, Andreas Greifelt, and Dieter Gerling. "Novel Inherently Fault Tolerant Permanent Magnet Synchronous Machine (PMSM) With Multiphase Windings." In 2021 24th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2021. http://dx.doi.org/10.23919/icems52562.2021.9634547.
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Cavagnino, Andrea, Alberto Tenconi, Gabriele Rizzoli, Michele Mengoni, and Giovanni Serra. "Multiphase induction machine for aero-engine shaft-line-embedded starter/generator: Scaled prototypes testing." In 2014 XXI International Conference on Electrical Machines (ICEM). IEEE, 2014. http://dx.doi.org/10.1109/icelmach.2014.6960475.
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Kang, Min, Jin Huang, Jiaqiang Yang, Dong Liu, and Haibo Jiang. "Strategies for the fault-tolerant current control of a multiphase machine under open phase conditions." In 2009 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2009. http://dx.doi.org/10.1109/icems.2009.5382959.
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Gule, Nkosinathi, and Maarten J. Kamper. "Evaluation of rotor bar and end ring current waveform of brush DC equivalent controlled multiphase cage rotor induction machine." In 2012 XXth International Conference on Electrical Machines (ICEM). IEEE, 2012. http://dx.doi.org/10.1109/icelmach.2012.6349990.
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Wang, Yan, Jiaqiang Yang, and Jian Gao. "Non-sinusoidal Supply Control Strategy Based on Rotor and Air-gap Flux Orientation for Multiphase Induction Machine." In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2019. http://dx.doi.org/10.1109/icems.2019.8922373.
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He, Shan, Jin Huang, and Min Kang. "A novel third harmonic current injection method to optimize the air-gap flux for multiphase induction machine." In 2017 20th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2017. http://dx.doi.org/10.1109/icems.2017.8056006.
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