Дисертації з теми "Synchronous PWM"
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So, Ting-pat Albert, and 蘇廷弼. "PWM-based asymmetrical rotor synchronous/industion drive." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208903.
Повний текст джерелаSo, Ting-pat Albert. "PWM-based asymmetrical rotor synchronous/industion drive /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12359452.
Повний текст джерелаGullone, Giorgio. "Sensorless algorithm for synchronous machines using current oversampling and PWM harmonics." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240413.
Повний текст джерелаSensorlösa drivsystem är en lösning som nuförtiden drar en utökad uppmärksamhet för de fördelar som de medför. Även om de uppvi- sar en sämre dynamik jämfört med de traditionella drivsystemen, det finns vissa fördelar som minskning av systemkostnader och komplex- itet, samt förbättrad ljudimmunitet och tillförlitlighet. Förutom de tra- ditionella metoderna baserad på en signalinjektion, som leder till an begränsad spänningsmarginal samt högre järnförluster, vridmoment rippel och akustiskt brus, i året 2010 har en ny metod föreslagits av Prof. Bolognani, Dr. Faggion och Dr. Sgarbossa. Denna algoritm defi- nierades "inre injektion-metoden, eftersom den utnyttjar strömöverto- ner som framkallas från pulsbreddmodulering. I detta arbete är analysen av ?inre injektion-metoden och dess imple- mentering i en MATLAB/Simulink-miljö ett föremål. Den teoretiska grunden analyseras i detaljer tillsammans med fenomenet och drifts- förhållandena som kan påverka prestanda. Drivsystemsmodellen be- skrivs och tre olika alternativ föreslås. Simuleringar körs med en algo- ritm som arbetar både i öppen slinga och i sluten slinga. Påverkan av samplingsfrekvensen, motorhastighet, lastmoment, pulsbreddmodu- lering strategi och spänning i DC-mellanleden analyseras och simuleras med avseende på ett fläkt- eller pumpapplikationsfodral.
Ibrahim, Zulkifilie. "Fuzzy logic control of PWM inverter-fed sinusoidal permanent magnet synchronous motor drives." Thesis, Liverpool John Moores University, 2000. http://researchonline.ljmu.ac.uk/5058/.
Повний текст джерелаYang, Jian. "Prediction of the power losses of PWM inverter drives for permanent magnet synchronous motors." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06112009-063124/.
Повний текст джерелаMiao, Dongmin. "Voltage Stabilization Control of Wide-Speed-Range Permanent-Magnet Synchronous Generator Systems." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/246410.
Повний текст джерелаDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Eriksson, Per. "Design and implementation of a servo system by Sensor Field Oriented Control of a BLDC motor." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-236875.
Повний текст джерелаBernardes, Thiago Araújo. "Análise e controle de gerador síncrono a ímã permanente aplicado a sistema de conversão de energia eólica." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/8472.
Повний текст джерелаThis dissertation addresses the analysis and control of permanent magnet synchronous generators (PMSG) found in wind energy conversion system. The operation modes of the wind turbine the current and voltage constraints of a PWM rectifier are defined and a methodology to determine the generator current is presented. The generator currents obtained guarantee the maximization of wind energy extraction as well as the minimization of the PMSG and rectifier losses. In addition, a space-vector modulation technique in overmodulation region is reviewed in detail and applied aiming: (i) to maximize the generator power; (ii) to utilize the entire PWM rectifier DC link voltage resource, and (iii) to obtain a smooth transition to six-step operation. Furthermore, a single current controller is designed for all operating modes being capable to avoid the controller states overload as well as the undesired effects due to the operation in the overmodulation region. The stability analysis of the closed loop system is investigated by means of linear matrix inequality conditions to estimate a region of operation with guaranteed stability. Simulation results are presented to demonstrate the performance of the proposed system.
Esta dissertação trata da análise e do controle de geradores sincronos a íımã permanente usados em sistema de conversão de energia eólica. Os modos de operação da turbina eólica sob restrição de tensão e corrente são definidos e uma metodologia para determinar as correntes do gerador ´e apresentada. As correntes obtidas do gerador garantem a maximização da potência extraída do vento bem como a minimização das perdas do conjunto gerador e retificador PWM. Além disso, a técnica de modulação vetorial na região de sobremodulação é revisada em detalhes e aplicada com objetivo de: (i) maximizar a potência do gerador, (ii) utilizar todo o recurso do barramento CC disponível pelo retificador PWM e (iii) obter uma transição suave para operação do retificador para o modo de seis-pulsos. Uma técnica de controle vetorial é apresentada e comparada. Um único controlador de corrente é projetado para todos os modos operacionais, sendo capaz de evitar tanto sobrecarga dos estados do controlador quanto os efeitos indesejáveis provenientes da operação na região de sobremodulação. A análise da estabilidade do sistema em malha fechada é investigada por meio de desigualdades matriciais lineares para determinar uma região de estabilidade garantida. Por fim, resultados de simulação são apresentados para demonstrar o bom desempenho do sistema proposto.
Bourgeade, Adrien. "PWM control optimization of a two-level inverter : Application to electric and hybrid vehicles." Electronic Thesis or Diss., Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0045.
Повний текст джерелаDespite improvements in DC/AC converter topologies, the two-level inverter remains the "gold standard" in the industry for many reasons: simplicity, reliability, etc. In this thesis between Ecole Centrale and Renault, new inverter controls have been developed to improve the performance without modifying the converter topology. For this purpose, two approaches based on synchronous off-line controls have been proposed. Firstly, an angular symmetry relaxation between phases usually imposed on the converter. Secondly triangular carrier based strategies, meaning injecting a triple frequency homopolar sequence into the modulating signal. The consequence of this approach has given rise to a generalization of the classical third harmonic injection. A calculation extension has shown the existence of an easily implementable methodology, which takes the form of a sawtooth injection. Both approaches revisit the pulse width modulation (PWM) control strategies of the literature with simple considerations based on relaxation and extension of existing properties. The advantage of all these strategies is that they improve significantly the harmonic distortion rate of the voltages or currents supplied by the inverter for low synchronous switching frequencies. These observations have been done in simulation and validated on a low power experimental bench
Yildirim, Dogan. "Field Oriented Control Of A Permanent Magnet Synchronous Motor Using Space Vector Modulated Direct Ac-ac Matrix Converter." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614302/index.pdf.
Повний текст джерелаAC matrix converter based surface mounted permanent magnet synchronous motor (PMSM) drive system. First, the matrix converter topologies are analyzed and the state-space equations describing the system have been derived in terms of the input and output variables. After that, matrix converter commutation and modulation methods are investigated. A four-step commutation technique based on output current direction provides safe commutation between the matrix converter switches. Then, the matrix converter is simulated for both the open-loop and the closed-loop control. For the closed-loop control, a current regulator (PI controller) controls the output currents and their phase angles. Advanced pulse width modulation and control techniques, such as space vector pulse width modulation and field oriented control, have been used for the closed-loop control of the system. Next, a model of diode-rectified two-level voltage source inverter is developed for simulations. A comparative study of indirect space vector modulated direct matrix converter and space vector modulated diode-rectified two-level voltage source inverter is given in terms of input/output waveforms to verify that the matrix converter fulfills the two-level voltage source inverter operation. Following the verification of matrix converter operation comparing with the diode-rectified two-level voltage source inverter, the simulation model of permanent magnet motor drive system is implemented. Also, a direct matrix converter prototype is constructed for experimental verifications of the results. As a first step in experimental works, filter types are investigated and a three-phase input filter is constructed to reduce the harmonic pollution. Then, direct matrix converter power circuitry and gate-driver circuitry are designed and constructed. To control the matrix switches, the control algorithm is implemented using a DSP and a FPGA. This digital control system measures the output currents and the input voltages with the aid of sensors and controls the matrix converter switches to produce the required PWM pattern to synthesize the reference input current and output voltage vectors, as well. Finally, the simulation results are tested and supported by laboratory experiments involving both an R-L load and a permanent magnet synchronous motor load. During the tests, the line-to-line supply voltage is set to 26 V peak value and a 400 V/3.5 kW surface mounted permanent magnet motor is used.
TARHAN, Muhammed Mustafa. "Assessment and Development of Advanced Power Saving and Supply Concepts For Small Automotive Electronics." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-23588.
Повний текст джерелаBláha, Martin. "Elektronicky komutovaný motor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217634.
Повний текст джерелаBarden, Alisson Thomas. "Projeto e análise de controladores robustos aplicados a inversores trifásicos de fontes ininterruptas de energia (UPS)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/141945.
Повний текст джерелаThe main objective of this work is the development of robust controllers based on the internalmodel principle, in synchronous and stationary frames, applied to the output stage of an uninterruptible power supply (UPS), in order to minimize the output voltage distortion caused by the connection of balanced and unbalanced nonlinear loads. The formulation in stationary abc-frame is accomplished through the aplication of a multiple resonant controller, so that, it is possible to achieve zero-error tracking of the sinusoidal reference and disturbances rejection on the output voltage due to the high amount of harmonic currents drained by the loads. Moreover, a controller in synchronous reference frame (dq0 axis) is formulated through the application of conventional Proportional-Integral (PI) controllers which are widely used in comercial UPS applications. The design of both controllers is formulated using a state-feedback robust controlmethod, in which the controller parameters are determined by solving a convex optimization problem subject to a set of LMI constraints. A comparative analysis on the performance of the single-mode resonant controller (tuned at the fundamental frequency) and the PI controller is performed, because these controllers are functionally equivalent in the sense of the internal model principle applied to their respective frames. Furthermore, the improvement in performance is demostrated with the use of multiple resonant controllers in stationary abc-frame where the resonance frequencies are chosen to suppress the effects of a specific harmonic in the UPS output voltage. The comparative analysis of the proposed controllers is performed through numerical simulations, making use of the dynamical and steady-state test methods and performance requirements defined by the IEC 62040-3 international stardard.
Pazdera, Ivo. "Průmyslové čerpadlo s integrovaným elektromagnetickým systémem." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233600.
Повний текст джерелаJohnson, Jordan Lowell. "Integrating Synchronous Collaborative Applications with Product Lifecycle Management Workflows." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5501.
Повний текст джерелаHasnain, Bakhtiyar Asef, and Ademir Hodzic. "Design and Simulation of a Slotless Aircored PM Synchronous Generator." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-425268.
Повний текст джерелаTiwari, Raghbendra. "Application of AC Superconducting Windings in Large PM Synchronous Generators for Wind Power." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18308.
Повний текст джерелаSibande, Sguda Enock. "Rotor design and performance evaluation of a PM-assisted reluctance synchronous traction machine." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50444.
Повний текст джерелаENGLISH ABSTRACT: The thesis describes the optimum rotor design and performance of a 110kW Permanent-Magnet assisted (PM-assisted) Reluctance Synchronous traction Machine (RSM) using bonded permanent magnet sheets. Particular attention is given to the performance of the machine drive in the flux-weakening speed region. A detail explanation is given of the finite-element design optimisation, the basic principles of operation and the control-design of the PM-assisted RSM drive. A theoretical torque comparison of the PM-assisted RSM, the standard RSM and the induction machine is also done. The measured and calculated results of the different drives are presented and analysed in detail. It is concluded that the performance of the PM-assisted RSM in terms of torque, voltage and power factor compares favourably well with that of the induction machine in both the constant torque and flux-weakening speed regions. Furthermore, it is shown that the temperature rise of the stator winding of the PMassisted RSM is lower than that of the RSM with both machines at the same load.
AFRIKAANSE OPSOMMING: Die tesis beskryf die optimum rotor ontwerp en vermoë van 'n 110 kW Permanent- Pagnet-ondersteunde (PM-ondersteunde) Reluktansie Sinchroon Masjien (RSM) trekkrag aandryfstelsel. Spesifieke aandag word gegee aan die vermoë van die aandryfstelsel in die vloedverswakking spoedgebied. 'n Volledige verduideliking word gegee van die eindige-element ontwerp optimering, die basiese beginses van werking en die beheer-ontwerp van die PM-ondersteunde RSM aandryfstelsel. 'n Teoretiese vergelyking van die draaiumoment-vergelyking van die PM-ondersteunde RSM, die standard RSM en die induksmasjien word gedoen. Die berekende en gemete resultate van die verskillende aandryfstelsels word in detail aangebied en ge-analiseer. Dit is gevind dat die vermoë van die PM-ondersteunde RSM in terne van draairnoment, spanning en arbeidsfaktor gunstig vergelyk met dit van die induksiemasjien in beide die konstante draairnoment en vloedverswakking spoedgebiede. Verder word getoon dat die temperatuur-styging van die statorwinding van die PM-ondersteunde RSM laer is as die van die RSM, met deide masjiene by die selfde las
Manzolini, Virginia. "Advanced algorithms for flux-weakening and sensorless control of interior PM and reluctance synchronous motor drives." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3427316.
Повний текст джерелаLe macchine sincrone a magneti permanenti (PMSM) sono sempre più utilizzate in applicazioni domestiche, commerciali e industriali per via della loro superiore efficienza, coppia elevata e alta densità di potenza. Grazie a queste caratteristiche, questo tipo di macchine viene ampiamente utilizzato in diversi campi. Nel settore dei trasporti, la trazione elettrica basata su PMSM sta diventando un forte concorrente dei sistemi di propulsione convenzionali basati su motori a combustione o macchine a induzione. Chiari esempi sono i veicoli elettrici puri e ibridi, i treni, ecc. A causa dei vincoli sempre più stringenti delle classi energetiche, le macchine PMSM stanno conquistando il mercato dei grandi elettrodomestici, ad es. lavatrici e asciugatrici, frigoriferi e condizionatori. Infine, la robotica e i sistemi di alta precisione, le macchine utensili e le applicazioni industriali impiegano sempre più macchine a magneti permanenti per dispositivi ad alte prestazioni ed efficienza. Negli ultimi anni c'è stato un crescente interesse per le macchine a riluttanza sincrona (SyRMs) poiché presentano una superiore affidabilità e sono economicamente vantaggiose a causa dell'assenza di magneti permanenti nel rotore. Per questo la possibilità di sostituire i motori a magneti permanenti presenti nelle esistenti applicazioni con macchine sincrone a riluttanza è di grande interesse per chi lavora nei campi precedentemente citati. Esigenze industriali hanno determinato le attività descritta in questa tesi. In particolare, gli argomenti di ricerca sono stati scelti e sviluppati in base alle specifiche esigenze di E.E.I. S.p.a. (Equipaggiamenti Elettronici Industriali - Vicenza, Italia), il partner industriale che ha finanziato la mia borsa di studio. Due principali temi di ricerca riguardanti il controllo delle macchine sincrone, in particolare IPMSM e SyRM, sono stati individuati. Innanzitutto, la possibilità di sviluppare un algoritmo di controllo in grado di sfruttare la capacità di questi motori di lavorare in un ampio intervallo di velocità. Questo è un aspetto cruciale nella progettazione di un azionamento elettrico poichè consente di evitare il sovradimensionamento del convertitore di potenza e del motore, che a sua volta porta a risparmi di spazio e denaro. Il secondo argomento riguarda l'analisi del controllo sensorless dei motori sincroni. Gli algoritmi di stima della posizione consentono di evitare l'uso di sensori che portando vantaggi in termini di costi e affidabilità dell'azionamento. Per queste ragioni le applicazioni sensorless sono molto interessanti da un punto di vista industriale. Tuttavia, le prestazioni degli algoritmi convenzionali per la stima della posizione a velocità bassa o nulla peggiorano in caso di condizioni di forte saturazione e potrebbero portare perfino all’instabilità dell’algoritmo.
Ivanic, Boris. "AVR for a synchronous generator with a six-phase PM alternator and rotating excitation system." Thesis, Uppsala universitet, Elektricitetslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-201997.
Повний текст джерелаAcquaviva, Alessandro. "Analytical Modeling of Iron Lossesfor a PM Traction Machine." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105477.
Повний текст джерелаFaggion, Adriano. "Algorithms and Rotor Designs for the Position Estimation of PM Synchronous motors at Zero and Nonzero Speed." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3427488.
Повний текст джерелаI convenzionali azionamenti elettrici per il controllo dei motori a Magneti Permanenti (PM) richiedo la conoscenza della posizione rotorica per poter applicare le trasformazioni dal sistema di riferimento stazionario a quello rotorico e viceversa. La posizione viene di norma determinata con un trasduttore di posizione che può essere un resolver, sonde ad effetto Hall o encoder. La presenza di questo trasduttore aumenta i costi, la grandezza e la complessità circuitale degli azionamenti e dei motori. Inoltre la loro manutenzione o sostituzione diventa difficoltosa in particolari applicazione, per es. pompe sommerse, macchine per l’eolico, ecc. L’eliminazione di questi trasduttori, quindi, risulta essere un gran vantaggio in termini di costi, affidabilità e riduzione della grandezza fisica del motore o anche dello stesso azionamento. E’ chiaro che questa eliminazione comporta che l’azionamento includa una tecnica alternativa in grado di stimare la posizione e la velocità rotoriche: questi azionamenti vengono definiti azionamenti sensorless. Negli ultimi anni la ricerca ha proposto diverse soluzioni di tipo sensorless che permettono la stima della posizione, diversificando per`o le tecniche per la regione di funzionamento in alta velocità da quelle in bassa velocità o a rotore fermo. Al giorno d’oggi, stimatori basati sulla ricostruzione del vettore di flusso o della fem (stimatori MRAS) vengono utilizzati per il primo caso, mentre nel secondo caso vengono utilizzati stimatori basati sulla iniezione di tensione ad alta frequenza. Mentre nel primo caso la tipologia di stimatore può essere applicata sia ai motori di tipo isotropi che con quelli anisotropi, la seconda tipologia di stimatore può essere applicata solo a motori anisotropi, visto che sfrutta la salienza magnetica per estrarre la posizione elettrica. Questa tesi verte appunto su queste due tipologie di stimatori, riassumendo in dettaglio i principali algoritmi utilizzati oggigiorno e implementandoli sia a livello simulativo che a livello sperimentale. Per una trattazione completa di questo argomento, vengono anche studiate le tre più comuni configurazioni rotoriche (a PM Interni, a PM a montaggio Superficiale ed Inset (incassati)) con una particolare attenzione verso quello che è il comportamento anisotropo o isotropo della macchina stessa e la possibilità di applicare uno o l’altro degli algoritmi sensorless descritti. Entrando in maggior dettaglio, per quanto riguarda lo stimatore MRAS, dopo una sua descrizione, viene presentato in una particolare applicazione che si riferisce ad un catamarano ibrido. Vengono quindi affrontate e discusse le problematiche legate alla strategia di partenza del motore tramite rampa di velocità, dell’aggancio sulla posizione stimata, dell’inversione di marcia. Inoltre viene studiata la sensitività dello stimatore che si dimostra dipendere dall’induttanza di statore e non dalla resistenza. Invece per quanto riguarda lo stimatore basato sull’iniezione di segnali ad alta frequenza è stato per prima cosa descritto sia nel caso con iniezione nel sistema di riferimento statorico sia in quello rotorico. Lo studio è stato effettuato con una formulazione di tipo generale, adattata poi per il tipo di iniezione di segnale effettuata. La trattazione tiene conto anche della induttanza differenziale mutua e questo ha permesso di ricavare un legame tra l’errore di stima la induttanza mutua stessa. Vengono presentati inoltre tre diversi schemi per l’estrazione della posizione elettrica: mediante regolatore PI, osservatore a due stati ed osservatore a tre stati. Dopo di che, lo stimatore con iniezione nel sistema di riferimento rotorico è stato testato sia in simulazione che su banco prova. La bontà dell’algoritmo di stima è stata provata su motori con due diverse configurazioni rotoriche: a PM Interni e di tipo Inset. L’induttanze diretta, in quadratura e mutua sono state studiate in dettaglio con il supporto di simulazioni agli elementi finiti (FEM). Grazie a questo studio è possibile prevedere l’errore di stima che verrà poi confrontato con quello ottenuto dalle prove sperimentali. Come detto in precedenza lo stimatore ad iniezione di segnale può essere utilizzato solo con quei motori che presentano una salienza magnetica. Da questa categoria quindi sono esclusi i motori SPM che, salvo alcune eccezioni come l’Inset, sono isotropi. Si è quindi pensato a come indurre in questi motori un comportamento anisotropo solo alle alte frequenze, cioè alle frequenze del segnale iniettato per la stima. In questa tesi viene presentata questa nuova configurazione rotorica definita "Ringed-pole". Questa consiste nella realizzazione di una gabbia di rotore inserendo degli anelli di rame cortocircuitato attorno a ciascun magnete permanente. La soluzione permette di andare a modificare alle alte frequenze il comportamento magnetico dell'asse diretto, mantenendo invariato quello di quadratura. In questo modo si viene a creare un comportamento anisotropo appunto alle alte frequenze, mantenendo però il comportamento isotropo della macchina per le basse frequenze. Questa caratteristica permette quindi di sfruttare lo stimatore basato sull'iniezione di tensioni alle alte frequenze, per la stima di posizione anche nel caso di motori SPM isotropi. Sono state eseguite simulazioni FEM e prove sperimentali per validare l’idea di base e provare l'effettiva possibilità della stima di posizione. Un secondo contributo riguarda la presentazione di un nuovo stimatore basato sulle armoniche di corrente causate dalla modulazione PWM. L'idea di base consiste nel pensare che la modulazione PWM effettui una intrinseca iniezione di tensione ad alta frequenza, più precisamente alla frequenza di switching. Queste tensioni inducono delle armoniche di corrente alla stessa frequenza che contiene l'informazione sulla posizione elettrica. L'informazione può essere estratta mediante uno schema di stima simile a quello che viene utilizzato nella normale iniezione di tensione. E' stata quindi effettuata una trattazione matematica per ricavare le espressioni delle componenti di tensione e di correnti alla frequenza di switching. Sono state eseguite delle simulazioni preliminari per confermare la correttezza dell’idea di base.
Mikuška, Martin. "Střídač pro trojfázový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220710.
Повний текст джерелаHuang, Ming Chuan. "Comparison of shaft position estimation and correction techniques for sensorless control of surface mounted PM synchrononous motors." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54888/.
Повний текст джерелаLee, Youngkook. "A Stator Turn Fault Detection Method and a Fault-Tolerant Operating Strategy for Interior PM Synchronous Motor Drives in Safety-Critical Applications." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16156.
Повний текст джерелаFakam, Tchakoue Mathias. "Dimensionnement vibro-acoustique des machines synchrones à aimants permanents pour la traction ferroviaire : Règles de conception silencieuse." Thesis, Ecole centrale de Lille, 2014. http://www.theses.fr/2014ECLI0004/document.
Повний текст джерелаThis thesis is part of a project for the development of rail transportation piloted by ALSTOM TRANSPORT. It meets the forecasts of fourfold increase of the interurban and regional travels in France before 2020, by respecting very severe environmental requirements, among which the restrictive standards of noise level emitted by trains. An important reduction of the noise radiated by motors is required. Our mission in this project was to develop a tool capable of predicting the electromagnetic noise produced by permanent magnet synchronous motors equipped with distributed or concentrated windings, and fed by a PWM converter. For that purpose, a multi-physics model was developed.A numerical - analytical coupling was set up to calculate the airgap magnetic pressures. Global airgap permeance and synchronous inductances are thus calculated thanks to statics finite element simulations. An unequalled level of precision and speed of resolution is obtained for the computation of airgap magnetic pressures. The PWM supply, the wedge permeability, the rotor shape and the asymmetry of stator teeth are taken into account. The quickness of the resolution allows coupling our tool with an optimization supervisor. Two prototypes were designed and built in order to validate the multi-physics model
Preindl, Matthias. "Novel Model Predictive Control of a PM Synchronous Motor Drive; Design of the Innovative Structure, Feasibility and Stability Analysis, Efficient Implementation, Experimental Validation." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423480.
Повний текст джерелаIl soggetto affrontato dal presente lavoro sono i controlli avanzati di coppia per azionamenti con un motore sincrono a magneti permanenti. A questo scopo, è stata introdotta una struttura modulare che semplifica la progettazione e l’implementazione del controllo predittivo basato su un modello (model predictive control, MPC): lo schema è costituito dal controllo dinamico e dal quadro di controllo. Il controllo dinamico è un regolatore di flusso virtuale, utilizzato per raggiungere un valore di riferimento voluto e un osservatore di stato che serve a ridurre gli effetti delle proprietà non modellizzate del sistema. Il problema del controllo è stato semplificato tramite l’utilizzo di trasformate statiche chiamate quadro di controllo. Accanto alle trasformate alpha-beta e d-q viene usata una procedura per la generazione di riferimenti di stato, basati su un criterio ottimale. Il quadro di controllo contiene anche lo schema di attuazione, che serve per definire l’insieme di ingressi disponibili. Da un lato, il controllore comanda in modo diretto l’accensione e lo spegnimento dei semiconduttori, ovvero i vettori di tensione, ottenendo un insieme finito d’ingressi (Finite Control Set, FCS). Dall’altro lato vengono attuati cicli di accensione (duty-cycles) attraverso una modulazione (pulse width modulation, PWM): ciò risulta in un insieme convesso d’ingressi (convex control set, CCS). È stata eseguita un’analisi di stabilità sia per CCS-MPC sia per FCS-MPC. MPC è stabile, se il problema di controllo ottimale ad esso associato è risolvibile e l’errore di stato converge all’origine. Tale stabilità può essere garantita attraverso il principale teorema di stabilità di MPC. Tuttavia, i requisiti di calcolo restrittivi rendono il teorema difficilmente applicabile nella pratica. Di conseguenza, viene introdotto l’approccio MPC basato su Lyapunov (Lyapunov-based MPC) per gli azionamenti, il quale fornisce garanzie sulla stabilità indipendentemente dall’orizzonte di predizione. Un vincolo di stabilità basato sulle funzioni di controllo di Lyapunov (control Lyapunov function, CLF) assicura la convergenza all’origine ed è stato provato che il problema ottimale di controllo risultante è sempre risolvibile. In altre parole, ad ogni istante di campionamento si può trovare un ingresso che soddisfi tutti i vincoli del sistema e renda stabile il sistema a circuito chiuso. Le proprietà di CCS-MPC vengono ottenute utilizzando un controllo non lineare ed è dimostrato che il sistema vincolato ad anello chiuso è stabile secondo Lyapunov. Le proprietà di stabilità di FCS-MPC sono più complesse a causa dell’insieme non continuo d’ingressi. Utilizzando metodi della teoria degli insiemi si dimostra che un errore di controllo sufficientemente ampio può essere diretto verso l’origine e tenuto in un dintorno dell’origine ben definito. MPC richiede che in ogni istante di campionamento si risolva un problema di ottimizzazione (constrained finite time optimal control, CFTOC). La limitata potenza di calcolo dei microcontrollori e la brevità dei periodi di campionamento richiedono un CFTOC relativamente semplice, che si può ottenere utilizzando un modello di flusso virtuale nel sistema statico di riferimento. Scegliendo piccoli orizzonti di predizione si limita la dimensione del CFTOC, la cui risoluzione necessità di algoritmi efficienti, che permettano di ottenere un risultato all’interno di un periodo di campionamento. Il CFTOC di CCS-MPC è un programma (convesso) lineare o quadratico (linear program, lp; quadratic program, qp) che può essere risolto tramite algoritmi efficienti e noti. Al fine di elaborare una strategia di tipo minimalista, viene introdotto un algoritmo efficiente che risolve analiticamente il problema con un orizzonte di predizione di un passo. Il CFTOC di FCS-MPC è un problema di programmazione lineare o quadratico a numeri misti interi (mixed-integer) ed è quindi più difficile da risolvere con metodi numerici standard. In pratica si calcolano tutte le soluzioni possibili, tra le quali viene scelta la soluzione ottimale. Per migliorare l’efficienza di calcolo si combina quest’approccio con tecniche branch-and-bound e branch-and-cut. Gli algoritmi di controllo sono stati sviluppati su una piattaforma software-in-the-loop (SiL) basata su Matlab/Simulink e il codice di programmazione è stato implementato su un banco di prova sperimentale, senza modifiche. La valutazione approva la progettazione e la realizzazione di CCS-MPC e FCS-MPC e indica buoni risultati sia nell’operazione dinamica che in quella stazionaria. I due approcci MPC hanno proprietà diverse che risultano vantaggiose per applicazioni differenti. CCS-MPC ha una frequenza di commutazione costante ed è un’alternativa promettente al controllo vettoriale proporzionale-integrale (PI). Il concetto può essere combinato con diversi schemi di modulazione, nella fattispecie si usa la modulazione simmetrica di vettori spaziali (symmetric space vector modulation, SSVM) e la modulazione discontinua di vettori spaziali (discontinuous space vector modulation, DSVM). FCS-MPC tiene conto della commutazione dell’inverter e raggiunge all’incirca un ripple di commutazione costante, ma ottiene una frequenza di commutazione variabile. Il concetto è vantaggioso per sistemi dove è richiesta un frequenza di campionamento alta rispetto alla frequenza di commutazione, per esempio azionamenti ad alta potenza o servoazionamenti. Inoltre, lo spettro della corrente di FCS-MPC non contiene armoniche PWM e di conseguenza è vantaggioso in termini di rumore acustico, data la mancanza di toni distinti. Tuttavia, le armoniche PWM distinte di CCS-MPC sono più semplici da filtrare. Si può concludere affermando che lo studio del problema dei controlli avanzati di coppia per azionamenti con un motore sincrono a magneti permanenti, ha portato all’individuazione di una strategia innovativa. L’introduzione di una nuova struttura di controllo ha semplificato notevolmente il problema di controllo predittivo, con particolare attenzione al concetto di stabilità. Inoltre, le implementazioni di tale struttura si sono rivelate particolarmente efficaci su piano computazionale.
Silaghiu, Sorin Mihail [Verfasser], Peter [Akademischer Betreuer] Mutschler, and Bernhard [Akademischer Betreuer] Piepenbreier. "Design and test of a highly scalable servo drive system based on PM linear synchronous motors / Sorin Mihail Silaghiu. Betreuer: Peter Mutschler ; Bernhard Piepenbreier." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://d-nb.info/1106114892/34.
Повний текст джерелаSporni, Peter. "Model synchronního stroje s PM založeného na ekvivalentní reluktanční síti." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218792.
Повний текст джерелаDušek, Jiří. "Řízení stroje s PM v d-q osách při použití Matlab/Simulink." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218789.
Повний текст джерелаCuenot, Jérémy. "Architectures d'alimentation et de commande des actionneurs haute-vitesse connectés aux réseaux avioniques à tension variable." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0263/document.
Повний текст джерелаThe main technological revolution of the new aircrafts is based on intensive electrification of many components of the aircraft. Moreover, the speed of electrical generators is no longer fixed but variable. This new way of generating electrical power generates voltage variations on DC networks. Besides, to increase the compactness of the Permanent Magnet Synchronous Machines (PMSM) at a given power, their mechanical speed is increased as much as possible by combining them with mechanical reducers for certain applications. The variation of the voltage level of the DC bus supplying a high-speed PMSM implies its sizing in order to ensure its controllability over the entire speed range which carries significant stresses on the Voltage Source Inverter (VSI). To solve this problem, one solution consists in adding an extra DC / DC converter between the input filter and the VSI to maintain the inverter input voltage at a value adapted to the operating point of the PMSM and to optimize its dimensioning. However, this solution increases the order of the system, which increases the complexity of its control, accentuated by the constraints related to the high-frequency nature of the PMSMs considered. The work carried out in this thesis concerns the study, the optimization and the control of the power supply architecture of the high-speed actuators connected to variable-voltage avionic DC networks. As a result, for the avionics applications considered, these power supply architectures integrating an additional DC / DC converter make it possible to reduce the mass and the volume of the power supply structure without degrading the overall efficiency of the conversion chain, in particular by using the impedance-source converters which allow to cancel the DC input current ripples. In addition, Pulse Amplitude Modulation (PAM) control strategies used with non-linear control architectures (flatness, passivity) make it possible to control these high-speed PMSMs while ensuring their stability over the entire operating range
Billings, Don, Mei Wei, Joseph Leung, Michio Aoyagi, Fred Shigemoto, and Rob Honeyman. "REAL-TIME INTEGRATION OF RADAR INFORMATION, AND GROUND AND RADIOSONDE METEOROLOGY WITH FLIGHT RESEARCH DATA." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607368.
Повний текст джерелаAlthough PCM/TDM framed data is one of the most prevalent formats handled by flight test ranges, it is often required to acquire and process other types. Examples of such non-standard data types are radar position information and meteorological data from both ground based and radiosonde systems. To facilitate the process and management of such non-standard data types, a micro-processor based system was developed to acquire and transform them into a standard PCM/TDM data frame. This obviated the expense of developing additional special software and hardware to handle such non-standard data types.
Aboelhassan, 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 джерела游宗穎. "A high-efficiency synchronous CMOS switching regulator with PWM/PFM-mode operation." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/90574937537011997692.
Повний текст джерелаHsu, Pao-Sheng, and 許堡勝. "A Synchronous PWM Controller for A CCFL Royer Inverter." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/84363382960434258762.
Повний текст джерела國立臺灣科技大學
電子工程系
93
This thesis presents a synchronous PWM controller for self-oscillation Royer inverter. The dead-time-modulated PWM (DTM-PWM) controller is composed of a monostable circuit and a constant-current charger (CCC). The controller use the primary-side feedback control strategy to eliminate the thermometer effect occurring in the cold-cathode fluorescent lamp (CCFL).The referred sawtooth is composed with a constant-period charge time and a variable dead-time. The synchronizing strategy is conducted by modulating the dead-time according to the resonant frequency of the Royer inverter. The design strategy for building the design example is proposed. A DTM-PWM controlled dimmable Royer inverter with two-CCFL by primary-side control is realized and experimented. The results of analysis and theoretical prediction are verified with experiments.
Chih, Yi-Te, and 池怡德. "Study of Direct Torque Control for Permanent Magnet Synchronous Motor Drives with Space Voltage Vector PWM." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/51421247337279610310.
Повний текст джерела國立成功大學
工程科學系碩博士班
93
This thesis presents a new direct torque control (DTC) system to control the permanent magnet synchronous motor (PMSM) based on a TMS320F2812 digital signal processor (DSP) experiment board. The digitalized PMSM control system was implemented by using DSP experiment board with advantages such as high precision and reliability and the controlling error caused by the variance of temperature or the interference of noise can be banished. The proposed DTC scheme in this thesis uses a flux compensator to eliminate the error in stator flux estimation at low speed operating region of the conventional DTC. Furthermore, to improve the flux linkage tracking, two PI controllers used to be the torque controller and the flux controller. The outputs magnitude of the flux regulator, , is controlled by the outputs of the torque controller and flux controller. The voltage command of the output of the flux regulator will be used to decide the space voltage vector PWM and determine the magnitude of the stator flux linkage. The simulation and experimental results for the proposed DTC were compared with a conventional DTC. These show that the proposed DTC has a high control performance than the conventional DTC.
Su, Hao-Bin, and 蘇豪斌. "Analysis and Synthesis for A Novel ZVT-PWM Diagonal Half-Bridge Forward DC/DC Converter with Synchronous Rectification." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/53072295022980075395.
Повний текст джерела國立成功大學
工程科學系碩博士班
94
Based on the Diagonal Half-Bridge Forward (DHBF) DC/DC converter and soft switching technique, a novel Zero-Voltage-Transition Pulse-Width Modulation (ZVT-PWM) DHBF DC/DC converter is proposed in this thesis. It has high power conversion efficiency. The diagonal switches of the conventional DHBF converter exhibits hard switching. To achieve soft-switching operation, the voltages of the diagonal switches must resonate down to zero before switching. The proposed converter is developed by paralleling an auxiliary circuit at primary side of the transformer of the DHBF converter. The auxiliary circuit comprises a resonant inductor, a resonant capacitor and an auxiliary switch, which is used to control resonant occurrence. The diagonal switches of the proposed converter can operate under zero-voltage switching (ZVS) and the auxiliary switch can also operate under zero-current switching (ZCS). It is effective to increase the efficiency of the converter. Moreover, the synchronous rectification technique is also employed to reduce the conduction losses of the output rectifier. As a result, the proposed converter still exhibits high efficiency at heavy load. The operation principle and theoretical analysis of the proposed converter are presented herein. They are validated by IsSpice simulations and experimental results. A prototype of ZVT-PWM DHBF converter for input and / output is finally implemented. The overall efficiency of the proposed converter achieves at full load. The efficiency of the soft switching technique and the synchronous rectification technique is demonstrated by the proposed ZVT-PWM DHBF DC/DC converter.
Liu, Li-hsiang, and 劉立祥. "DSP-Based Sensor-less Permanent Magnet Synchronous Motor Driver With Quasi-Sine PWM for Air-Conditioner Rotary Compressor." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/92687055331848466788.
Повний текст джерела國立中山大學
電機工程學系研究所
100
This thesis presented a sensor-less permanent magnet synchronous motor (PMSM) driver for controlling air-conditioner rotary compressor speed. In this thesis, a quasi-sine pulse-width modulation (PWM) driving method was proposed. Furthermore, the current feedback control scheme and rotor magnet pole position detection were included. The system structure was implemented by using a digital signal processing (DSP) platform. The proposed driving scheme was compared with the square-wave driving without current feedback and six-step square-wave driving method with current feedback. Moreover, the passive and shunt semi-active power factor correction (PFC) technique were researched for the air-conditioner application. Experimental results demonstrated that the system power factor could be improved by the proposed shunt semi-active PFC method. Besides, the proposed sensor-less quasi-sine PWM driving method implemented in an air-conditioner compressor driver was capable of reducing the magnitude of rotational speed ripples, compressor vibration, and system power consumption.
Jiang, Maoh Chin, and 江茂欽. "Novel three-phase current-forced voltage-doubler PWM converter and applications to solid-state synchronous condenser and active power filter." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/91085629515430974431.
Повний текст джерелаXu, Li-Fang, and 許力方. "A new torque controlled PM synchronous motor drive." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/05178326170056099465.
Повний текст джерелаLin, Da-Chung, and 林大鈞. "Robust Two Degree of Freedom Control of PM Synchronous Motors." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/71207057423287661976.
Повний текст джерела國立中山大學
電機工程學系研究所
88
Because of several advantages, e.g. compact structure, high air-gap flux density, and high torque capability, the PM synchronous motor plays an important role in recent years. The basic principle of controlling a PMSM is based on vector control. The control performance is influenced by factors as the plant parameter variations, the external load disturbances, and the unmodeled or nonlinear dynamics. In the thesis, we apply a recently proposed robust 2DOF configuration to designing controllers for PMSM to achieve the robust asymptotical tracking under perturbations in both the motor and the controllers. Two design methods are adopted to implement the desired controllers, i.e. the linear algebraic method and the design method. The effect of the well-known internal model principle is addressed in the former design method. The merit of the latter design method is that both time and frequency domain design specifications can be easily included in the design procedure. Computer simulation results are displayed to illustrate the advantages of our designs.
Lin, Tsung-Jen, and 林宗仁. "A Study on Integration of PM/Synchronous Generators and PV System." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/btu78x.
Повний текст джерела國立成功大學
電機工程學系碩博士班
90
This thesis presents the results of a study on integration of a permanent magnet generator (PMG)/a synchronous generator (SG) and a PV System. A PMG and a SG are respectively utilized as a wind generator. To improve variable frequency, variable voltage, and loading effects of both generators under random wind speeds, a rectifier module and a battery system are employed to combine both PV and wind systems. The stored energy in the battery system is converted into constant voltage and constant frequency by means of an inverter module to supply isolated loads or connect to a utility grid. A d-q axis equivalent-circuit machine model is employed to establish the PMG, SG, rectifier, inverter, PV, and battery models in order to derive the complete dynamic equations of the studied system under three-phase balanced loading conditions. The derived system model is also employed to obtain system eigenvalues to determine dynamic stability. Experimental results obtained from a laboratory 500 W PMG, a 300 W SG, a 1.5 kW PV system, a 24 V battery system, and a 4.5 kW inverter module are compared with the simulated results to validate feasibility of the proposed models.
Chia-NingChang and 張家寧. "A Study on Suppression of Bearing Current for PM Synchronous Motor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2cpvdr.
Повний текст джерелаΠρωιμάδης, Ιωάννης. "Μελέτη και κατασκευή συστήματος οδήγησης σύγχρονου κινητήρα μαγνητικής αντίδρασης (reluctance)". Thesis, 2012. http://hdl.handle.net/10889/6225.
Повний текст джерелаThis Thesis is focused on the study and development of a Drive System for the Synchronous Reluctance Motor. This work was conducted in the laboratory of Electromechanical Energy Conversion, at the department of Electrical and Computer Engineering, in the University of Patras, Greece. The main purpose of this project was the study and construction of a three Phase Voltage Source Inverter for the control of the performance of a Synchronous Reluctance Motor by the implementation of Scalar and Vector control. In this thesis, a scalar V/f control scheme was applied, both open and closed loop, for the control of the rotational speed of the rotor. As far as the Synchronous Reluctance Motor is concerned, in the latest years a great interest has emerged around this motor, which mainly focuses in the optimization of its construction and control. The main feature of this motor is that the rotor does not have any field winding. By this way, the output torque is produced only by the so called reluctance torque. In this work, an introduction on the AC motor is done, while the main interest is focused on the already mentioned motors. The analysis of this motor covers many aspects, such as the construction characteristics, the mathematical model of the motor, as well as a comparison with other popular motors. Moreover, the three Phase Inverter is studied, since it is used for the control of the motor. Also, there is an extended reference on the Pulse Width Modulation technique, which is used for the control of power devices. In the next chapters, the simulation of this motor is presented, since it is necessary fot the understanding of its dynamic behavior. In the following, an analysis on the design and construction of the required printed circuit boards is done, while the microcontroller which was used is presented in a more detailed way. The flowacharts of the open and closed loop control methods of the rotational speed are also given. Finally, the experimental results for both cases are presented and analysed.
Chen, Li-Yuan, and 陳立原. "The Design and Implementation of a DSP-Based PM Synchronous Motor Drive." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/00540601894458922132.
Повний текст джерела逢甲大學
電機工程所
96
The main purpose of this thesis is to design and implement a Permanent Magnet Synchronous Motor (PMSM) drive by using the Digital Signal Processor (DSP) controller. The Direct Torque Control (DTC) is a method to control the torque by calculating the magnetic flux and torque based on the measured voltage and current of the motor. Because of the fast response characteristics for torque and flux changes, if has widely adopted to the AC inductor motors drive. In order to obtain the same results as in the inductor motors drive, the DTC algorithm will be applied to the PMSM drive in this thesis. Due to the fast and quick switching of the motor drive, large amount of the harmonics are generated in the supply terminal and then result in the low power factor for the drive. This thesis will design and implement an active power factor corrector to improve this drawback. Also, for real time monitoring the dynamic behavior of motor drive, a serial communication via the USB controller interface will be designed to communicate between the DSP and PC. Finally, a prototype PMSM drive will be implemented and the experimental results will also be demonstrated.
Luo, Yi-ren, and 羅以任. "Optimal Design and Analysis of a Direct-Drive Wind PM Synchronous Generator." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/67317260859013451789.
Повний текст джерела逢甲大學
電機工程所
98
The purpose of this thesis is to design a direct-drive wind permanent magnet synchronous generator for use in small-scale wind energy applications. First, based on the proposed design procedure, a suitable slot and pole number combination and winding layout are selected. Then a prototype generator that meets the required output power is designed. In order to reduce the cogging torque and increase the efficiency, the shapes of slot in the stator and the size of the magnets in the rotor are optimized using the Taguchi method coupled with the finite element analysis firstly. A technique is used to improve the generator efficiency. The optimized result achieves the demand of output power. The cogging torque and efficiency match the goal.
Chen, Yu-Da, and 陳昱達. "Design of Vector Control Chip for Speed Sensorless Interior PM Synchronous Motor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/36041236686903048420.
Повний текст джерела國立臺灣科技大學
電機工程系
97
This thesis applies the cell-based IC design flow procedure to develop a vector control chip for a speed sensorless interior permanent magnet (IPM) synchronous motor. First, the speed sensorless vector control system for an IPM is established. The system is per unitized so that it can be applicable to different motor specifications. Next, the computer-aided design tool, MATLAB/Simulink, is used to build the floating-point based numerical model, which is then used to design fixed-point Q-value based 32-bit and 16-bit numerical models for the IPM control system. Based on the numerical simulation results, the thesis develops the Verilog HDL programming codes for the IPM vector control system on the Xilink ISE platform. The numerical results are verified and the initial IC design phase is achieved. The second phase of IC design follows the routing and placement procedure: The register transfer level produced by the programming codes is logically synthesized and the netlist is generated. Through automatic placement and routing, the final placement for the sensorless IPM vector control chip is obtained.
Baek, Jeihoon. "Robust Generator System Using PM Assisted Synchronous Reluctance Generator with Current-fed Drive." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7319.
Повний текст джерелаChiu, Chien-Shiang, and 邱健翔. "Experimental results on speed control of a PM synchronous motor using fuzzy-vss." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/30717334061857613860.
Повний текст джерела國立聯合大學
電機工程學系碩士班
95
In this paper, we try to apply a fuzzy variable structure controller in the speed control of permanent magnet synchronous motor. Since the variable structure controller is extremely robust, it can be used to eliminate the variance of motor parameters as well as the impact of external load on the system response. However, the introduction of high speed and discontinuous switching action cause the so-called chattering phenomenon, which is highly undesirable because it may excite high frequency unmodeled plant dynamics and may lead to unforeseen instability. To overcome the drawback, we replace the discontinuous term of the variable structure system with a fuzzy logic controllers, and turn them into control variables with fuzzy properties. As a result, the chattering of the variable structure controller and the control performance of the system are improved. Both simulation and experiments studies on the design of a speed servo controller for a PM synchronous motor are presented to demonstrate its effectiveness. The experimental results also demonstrate that the proposed method provides better performance than the variable structure control with a smooth function.
Wen-ChunChi and 戚文駿. "A Study on General Purpose Position Sensorless PM Synchronous Motor Drives and Its Applications." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/q4833j.
Повний текст джерела國立成功大學
電機工程學系
102
Generally, in order to implement the drive control of the PM synchronous motor, the rotor position information is essential. However, position sensors may increase the cost and volume of the motor system due to the extra components and wiring. Moreover, most position sensors are sensitive to change in ambient temperature. As a result, the reliability of the position sensor based approach is far from satisfactory in some specific applications. In order to alleviate the above problem, this dissertation develops a general purpose position sensorless method for PM synchronous motor drives. This dissertation proposes a sliding-mode current observer based on a general purpose equivalent back-EMF model. By using the back-EMF estimated from the sliding-mode current observer, one can indirectly obtain the information of the angular position and velocity of the rotor. The estimated rotor position is accurate, and fast convergence of the observer is guaranteed over a wide speed range. Moreover, only stator resistance and stator inductances in the q-axis are essential to the calculation of the general purpose equivalent back-EMF, which is easy to implement in low-cost microcontrollers. In addition, the drives of PM synchronous motors capable of electric braking not only allow the motors to smoothly decelerate to a soft stop, but also can recover kinetic energy so as to improve the efficiency of energy consumption. In order to conduct an in-depth study on this topic, this dissertation analyzes and implements three possible position sensorless electric braking commutation strategies based on a general full-bridge motor drive without any additional power switches and bulky passive components. For the position sensorless electric braking commutation strategies, theoretical analysis on different performance indices such as maximum voltage conversion ratio, braking torque, energy recovery ratio, etc., are carried out and compared among each commutation strategy. Finally, theoretical analysis, several experiments and various applications are performed to verify the effectiveness of the proposed methods. Experimental results indicate that the proposed position sensorless FOC and electric braking commutation methods are suitable for various speed regulation applications.