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Kibby, Devon. "Comparison of methodologies for induction motor design." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121549.
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In the last few decades, the world of electric machine design, specifically induction machine design, has been reinvigorated by the introduction of power electronics. Where designers were once limited to a single alternating current waveform with constant voltage and frequency, power electronics have thrown all those assumptions out the window. The change has necessitated new design methods that go beyond the typical induction motor electrical equivalent circuit seen in every textbook for the last century and have sent designers back to first principles. With that sentiment, early induction motor invention and improvements are explored. It is shown that even though the development and commercialization of the induction motor was quite rapid, the theory and understanding of the underlying physics kept pace. Basic design methodologies and tools, including the Hopkinson magnetic circuit and the Steinmetz equivalent circuit, from the so-called "'Golden Age' of induction motor development" are traced forward through textbook examples to support the claim. Newer electric machine analyses are presented in the form of the modern treatment of the magnetic equivalent circuit, MEC, and the finite element method, FEM. A derivation of the MEC element from the magnetic scalar potential is completed utilizing the theory of tubes and slices to give a more tangible justification to the field assumptions made. The knowledge from these assumptions is then applied to the FEM to show how to construct an MEC element using the FEM. Tellegen's theorem is applied to the MEC and a brief example given showing how one might compute the first-order sensitivity of a small change in stator windings in an induction motor to a small change in torque. A brief overview of the engineering design process is described with a focus on augmentation with computer aided design tools, CAD. The equivalence shown between the MEC and FEM is used to support the idea that a FEM-based electric machine CAD package could be modified to utilize MEC assumptions or knowledge in order to reduce computation time when coarser models are favored, such as in the early design stages.Depuis les dernières quelques décennies, l'industrie de la conception de la machine électrique, spécifiquement la conception de moteur à induction, a été revigoré par l'introduction des électroniques de puissance. Là ou les concepteurs étaient jadis limités à un courant alternatif avec fréquence et voltage constant, l'électronique de puissance est venue compliquer les lignes directrices de la conception. Ces changements ont nécessité des nouvelle méthodes qui vont au-delà du circuit équivalent typique mentionné dans tous les livres de référence depuis le dernier siècle et ont reporté les concepteurs aux principes de base. C'est à partir de cette complication que l'évolution du moteur à induction depuis son invention est revisitée. Il a été démontré que, malgré son développement et sa commercialisation notablement rapides, la théorie du moteur à induction et notre compréhension des principes physiques ont suivi le rythme. Les méthodologies de base et outils de conception provenant du soi-disant âge d'or du moteur à induction, notamment le circuit magnétique Hopkins et le circuit équivalent Steinmetz, sont retracés dans les exemples à travers les livres de référence pour supporter la thèse. L'analyse des machines électriques actuelles est présentée sous la forme du circuit magnétique équivalent (MEC) moderne et par le calcul par éléments finis (FEM). Une dérivation du MEC à partir du potentiel magnétique vectoriel est réalisée en utilisant la théorie des tubes et tranches pour justifier les hypothèses concernant les champs électromagnétiques. Par la suite, ces hypothèses sont appliquées au calcul FEM pour démontrer la création d'un MEC à partir du calcul FEM. Le théorème de Tellegen est appliqué au MEC et un exemple concret est élaboré pour démontrer comment calculer la sensibilité de premier ordre entre un petit changement dans le bobinage électrique du stator et un petit changement dans le couple.Un bref aperçu du procédé de conception est apporté avec un focus sur la contribution des logiciels de conception assistée par ordinateur (CAD). L'équivalence démontrée entre la méthode du MEC et celle par le calcul FEM est utilisée pour soutenir l'idée que les logiciels CAD basés sur le calcul FEM pourraient être modifiés pour inclure les hypothèses apportées par le MEC dans le but d'économiser le temps de calcul lorsque, durant les étapes préliminaires de la conception, un modèle simple suffirait.
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Ceron, Guerrero Jose Hermilo. "Design of a high specific torque induction motor." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/design-of-a-high-specific-torque-induction-motor(723d535b-d9f0-400d-b0ba-84e77af0e8c0).html.
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Electric vehicles are a key technology in the reduction of our carbon footprint and this has motivated significant research interest. The electrical traction motor is one of the main areas of research in attempts to further improve electric vehicle performance. The permanent magnet motor is the predominant device in this application because of its high specific torque. However, it has suffered from market speculation in the raw magnet materials which has generated efforts to develop electrical machines which have a high specific torque and do not contain rare earth materials. In the past the induction motor used to be the preferred motor for electric vehicles due to its low costs, low maintenance requirements, mature technology and robustness. The induction motor requires a higher specific torque to make it an alternative to permanent magnet machines. For this reason, this research had the primary aim of improving the specific torque of induction machines by undertaking a detailed review of the motor design because this process has conventionally focussed on the requirements for industrial applications. The first stage of the work presented in this thesis consisted of identifying the designs already in use for this purpose and the potential technologies applicable to the induction motor that could be transferred from other electric traction machines. A full review of the design process was also conducted in order to identify the key areas of the process with special reference to the electromagnetic design which used finite element techniques as the main modelling tool. New induction motor designs were developed which showed potential for improving the specific torque; two of these were selected for further refinement, prototyping and testing. Although these designs were modified to facilitate construction, some major difficulties were still encountered during the prototype rotor manufacture. The test results were used to validate the design process and to identify further improvements in the designs. The issues encountered with the rotor manufacture prototype however lead to some overheating during the experimental testing. Comments about the design experience gained during this research are summarized including suggestions for further research.
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Hu, Yifei. "Linear Induction Motor Investigation and Design for Articulated Funiculator." Thesis, KTH, Elektrisk energiomvandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177816.
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Articulated Funiculator is a new and innovative concept developed by Tyréns forachieving a more efficient vertical transportation with a higher space utilization.Having a variety of merits, i.e.: simple construction, direct electromagneticthrust propulsion, and high safety and reliability in contrast to rotary inductionmotor, linear induction motor (LIM) is considered to be one of the cases as thepropulsion system for Articulated Funiculator. The thesis is then carried outwith the purpose of determining the feasibility of this study case by designing theLIMs meeting some specific requirements. The detailed requirements include: aset of identical LIMs are required to jointly produce the thrust that is sufficientto vertically raise the moving system up to 2 m/s2; the size of the LIMs cannotexceed the specification of the funiculator; the maximum flux density in the airgap for each LIM is kept slightly below 0.6 T; no iron saturation of any part ofthe LIMs is allowed.In this thesis report, an introduction of LIM is firstly presented. Followingthe introduction, relevant literature has been reviewed for a strengthenedtheoretical fundamentals and a better understanding of LIM’s history and applications. A general classification of LIMs is subsequently introduced. In addtion,an analytical model of the single-sided linear induction motor (SLIM) has beenbuilt based on an approximate equivalent circuit, and the preliminary geometryof the SLIM is thereby obtained. In order to acquire a more comprehensiveunderstanding of the machine characteristics and a more precise SLIM design, atwo-dimensional finite element method (2D-FEM) analysis is performed initiallyaccording to the preliminary geometry. The results, unfortunately, turn out tobe iron severely saturated in the teeth and yoke, and a excessive maximumvalue of air-gap flux density. Specific to the problems, different parameters ofthe SLIM are marginally adjusted and a series of design scenarios are run inFlux2D for 8-pole and 6-pole SLIM. The comparisons between the results areconducted and the final solution is lastly chosen among them.Articulated Funiculator är ett nytt och innovativt koncept som utvecklats av Tyréns för att möjilggöra en mer effektiv vertikal transport och bättre utnyttjautrymme. Tack vare fördelar såsom en enkel konstruktion, direkt elektromagnetiskdragkraftsframdrivning, samt hög säkerhet och tillförlitlighet i motsatstill roterande induktionsmotor, är en linjär induktionsmotor (LIM) aktuell somframdrivningssystem. Detta examensarbete är utfört med syfte att utforma enLIM för att uppfylla vissa specifika krav. De detaljerade kraven inkluderar: enuppsättning identiska LIM krävs för att gemensamt producera tillräcklig dragkraftför att vertikalt höja det rörliga systemet upp till 2 m/s2; storleken påLIM får inte överstiga specifikation; den maximala flödestätheten i luftgapet förvarje LIM hålls är begränsad till knappt 0.6 T; ingen järnmättnad av någon delav LIM är tillåtet. I denna rapport ges först en introduktion av LIM-konceptet. Efter introduktionenhar relevant litteratur granskats för att stärka teoretiska grundkunskapersamt ge en bättre belysning av historiken kring LIMs samt dess applikationer. Utöver detta har en analytisk modell av den ensidiga linjära induktionsmotorn(SLIM) byggts, baserat på en ungefärlig ekvivalent krets med vilket den preliminärageometrin för SLIM. För att erhålla en mer grundläggande förståelse avmaskinens egenskaper är en tvådimensionell analys med finita elementmetoden(2D-FEM) utförd, initialt med användande av en preliminär geometri erhållenmed hjälp av analytisk dimensionering. Resultaten från dessa simuleringar visadedock att järnet mättats kraftigt i både tänderna och oket och ett överdrivetstort maximivärde av luftgapets flödestäthet erhålls. Specifikt för applikationenjusteras olika parametrar och en rad driftscenarier körs i Flux2D för en 8-poligoch en 6-polig SLIM. En slutgiltig jämförelse mellan de olika maskindesignernapresenteras och den rekommenderade lösningen väljs slutligen.
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Wen, Xin. "A hybrid intelligent technique for induction motor condition monitoring." Thesis, University of Portsmouth, 2011. https://researchportal.port.ac.uk/portal/en/theses/a-hybrid-intelligent-technique-for-induction-motor-condition-monitoring(bafbf73a-0813-44f8-8f00-9212cc54c890).html.
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The objective of this research is to advance the field of condition monitoring and fault diagnosis for induction motors. This involves processing the signals produced by induction motors, classifying the types and estimating the severity of induction motors faults. A typical process of condition monitoring and fault diagnosis for induction motors consists of four steps: data acquisition, signal analysis, fault detection and post-processing. A description of various kinds of faults that can occur in induction motors is presented. The features reflecting faults are usually embedded in transient motor signals. The signal analysis is a very important step in the motor fault diagnosis process, which is to extract features which are related to specific fault modes. The signal analysis methods available in feature extraction for motor signals are discussed. The wavelet packet decomposition results consist of the time-frequency representation of a signal in the same time, which is inherently suited to the transient events in the motor fault signals. The wavelet packet transform-based analysis method is proposed to extract the features of motor signals. Fault detection has to establish a relationship between the motor symptoms and the condition. Classifying motor condition and estimating the severity of faults from the motor signals have never been easy tasks and they are affected by many factors. AI techniques, such as expert system (ES), fuzzy logic system (FLS), artificial neural network (ANN) and support vector machine (SVM), have been applied in fault diagnosis of very complex system, where accurate mathematical models are difficult to be built. These techniques use association, reasoning and decision making processes as would the human brain in solving diagnostic problems. ANN is a computation and information processing method that mimics the process found in biological neurons. But when ANN-based methods are used for fault diagnosis, local minimums caused by the traditional training algorithms often result in large approximation error that may destroy their reliability. In this research, a novel method of condition monitoring and fault diagnosis for induction motor is proposed using hybrid intelligent techniques based on WPT. ANN is trained by improved genetic algorithm (IGA). WPT is used to decompose motor signals to extract the feature parameters. The extracted features with different frequency resolutions are used as the input of ANN for the fault diagnosis. Finally, the proposed method is tested in 1.5 kW and 3.7 kW induction motor rigs. The experimental results demonstrate that the proposed method improves the sensitivity and accuracy of the ANN-based methods of condition monitoring and fault diagnosis for induction motors.
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Guldemir, Hanifi. "Prediction of induction motor line current spectra from design data." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287180.
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Brown, Christopher P. (Christopher Perry). "Design for manufacturability of a high-performance induction motor rotor." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38170.
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Škoda, Josef. "Pětifázový asynchronní motor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413145.
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This thesis deals with the design of a five-phase machine. In the first part of this thesis are presented theoretical knowledge about five-phase machines. In the next part of the thesis is designed five-phase machine by analytical calculation according to selected parameters. This calculation includes the resulting load and start characteristics. The geometrical parameters of the machine are transferred to the Ansys program, where the finite element calculation is performed together with the required simulations. The results are compared and commented.
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RODRIGUEZ, GALLEGO ALBERTO. "Design and Optimization of an IE44-pole 7.5 kW Induction Motor." Thesis, KTH, Elektrisk energiomvandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160702.
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In this thesis, a High Efficiency (IE2), 7.5 kW, 4-pole, induction motor (IM) is studied and redesigned using finite element method (FEM) software with the purpose of increasing its efficiency to the new Super Premium Efficiency (IE4) level. First, a pre-existing model of the motor is analyzed and improved. Then, different methods to improve the efficiency of the motor are investigated and the performance of the machine is studied after each modification. Thirdly, a complete optimization of the design is carried out with the goal of developing an IE4 IM compatible with IEC standard frames. Finally, a similar optimization of the motor is performed substituting the aluminum squirrel cage by a copper one. The pros and cons of this change are studied. The results show the feasibility of reaching the IE4 efficiency level by this type of IM with a standard shaft height. Preserving the original cross-section design of the stator, this efficiency level is only reached if a copper squirrel cage is used and if the rotor cross-section is redesigned. However, if the external diameter of the stator is increased and the rotor and stator cross-sections are redesigned, aluminum rotor bars and short-circuit rings can be used to reach the IE4 efficiency level.I detta examensarbete analyseras en 7.5 kW 4-pol induktionsmotor med verkningsgradsklass IE2 med hjalp av Finita Element Metoden (FEM). Syftet med arbetet ar att utvardera olika metoder for att oka motorns verkningsgrad och att foresla designforandringar som kan mojliggora en uppgradering till verkningsgradsklass IE4. Forst analyseras och justeras en befintlig modell av motorn som sedan anvands for att utvardera effekterna av olika designforandringar. Sedan optimeras motorn for att oka verkningsgraden, detta gors bade med aluminium och med koppar som rotorledarmaterial. Resultaten visar att det ar mojligt att uppna verkningsgradsklassen IE4 genom att anvanda antingen aluminium eller koppar som rotorledarmaterial. For bada fallen kravs att motorns langd okas. Da koppar anvands kravs endast en ny tvarsnittsgeometri for rotorn medan da aluminium anvands behover bade rotor och statorgeometri andras.
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Plascencia-Gonzalez, Jose Guillermo. "Design and implementation of a field-oriented induction motor control drive." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/27224.
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This thesis describes the design and implementation of an induction motor field-oriented controller. Simulation studies are carried out on important aspects of the drive system, based on which a high-performance induction motor drive control is designed and implemented using a PC computer and interface hardware. The simulation software is based on a mathematical model that uses tensor techniques and includes the pulse width modulator and the flux, current, speed and position calculations.
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Legesse, Michael. "Coupled simulation of an indirect field oriented controlled induction motor drive." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116014.
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Conventionally, system simulations of induction motor drives use lumped parameters model of the motor. This approach assumes motor parameters to be constant during the entire operation of the drive. Unfortunately, these are known to vary significantly over the operating range of the motor due to factors such as magnetic saturation, skin effects, and operating temperature. The variations in motor parameters affect motor output and control parameters resulting in degraded drive performance. One way of overcoming this problem is by coupling the field model of the induction motor with the drive simulation. By replacing the lumped parameters model with the field model, the influence of different operating conditions on motor parameters can be taken into account dynamically. In this thesis such an approach is investigated by coupling the finite element analysis of an induction motor with the system simulation of the field oriented controlled drive. The results obtained for the coupled simulation are promising and possible future works to make this method of simulation more accurate and reliable are recommended.
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Herwald, Marc A. "Control Design and Analysis of an Advanced Induction Motor Electric Vehicle Drive." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/32934.
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This thesis is about the development and performance enhancement of an induction motor electric vehicle drive system. The fundamental operation of the induction motor drive hardware and control software are introduced, and the different modulation techniques tested are described. A software simulation package is developed to assist in the control design and analysis of the drive system. Next, to establish the efficiency gains obtained by using space vector modulation in the improved drive system, an inverter with hysteresis current control is compared to the same inverter with space vector modulation in steady state and on separate driving profiles. A method for determining induction motor harmonic losses is introduced and is based on obtaining the phase current harmonics from sampled induction motor stator phase currents obtained. Using a semi-empirical loss model, the induction motor losses are compared between different pulse width modulation control strategies throughout the torque versus speed operating region. Next, several issues related to the robustness of the control design are addressed. To obtain good performance in the actual vehicle, a new method for driveline resonance compensation is developed and proven to work well through simulation and experiment. Lastly, this thesis discusses the development of a new method to compensate for the gain and phase error obtained in the feedback of the d-axis and q-axis stator flux linkages. Improved accuracy of the measured stator flux linkages will be shown to improve the field oriented controller by obtaining a more accurate measurement of the feedback electromagnetic torque.Master of Science
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Bhamidi, Sarveswra Prasad. "Design of a single sided linear induction motor (SLIM) using a user interactive computer program." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4308.
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Thesis (M.S.)--University of Missouri-Columbia, 2005.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (May 26, 2006) Includes bibliographical references.
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Goynuk, Yilmaz. "Development Of An Electrical Machines Analysis And Optimum Design Software Package." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609788/index.pdf.
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In this study, three different programs are developed for the analysis of the
three-phase induction motor, single-phase capacitor type induction motor
and switched reluctance motor. The programs are developed by using Pascal
and C++ programming languages. In the performance calculations of motors,
analytical methods are used and these methods are tested for accuracy.
These programs have also capabilities to design an optimum motor, which
meets a set of performance, material and manufacturing constraints while
minimizing the weight or any other defined objective function.
In addition, in this study, an optimization tool is used to obtain an appropriate
optimization method for the design of different types of motors.
The software is tested over different commercial motors. The results illustrates
that the performance calculations and optimization approach of the
programs lead to good results.
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Li, Wei-Ting, and 李威霆. "Adaptive controller design of induction motor." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/80999487544372184730.
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碩士國立臺灣科技大學
機械工程系
89
The purpose of this paper is to propose an adaptive controller for induction motor control system. Some of the system parameters are assumed to be unknown time varying without any information of their variation bounds. Traditional adaptive control algorithms are not application to this kind of systems due to their time-varying nature. Here, a function approximation based controller is designed to transform the time-varying parameters into a linear combination of known orthonormal basis. Besides, the singularity problem of the decoupling matrix is dealt with by redesigning the parameter update algorithms. Simulation cases shown that the proposed schemes have excellent performance.
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蔡正爵. "Computer-Aided Design of Induction Motor Drives." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/57348451109906511419.
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Wu, Ming-Jheng, and 吳明政. "Induction Motor Driver Design and Vector Control." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/28881638872586406273.
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碩士國立中正大學
機械工程學系暨研究所
101
This thesis describes how I to creat a vector control system for an induction motor. First analyzed the model of the induction motor, and then research the viability of two control theories, scalar control and vector control. It was decided upon to use vector control. I also researched vector control theory of torque control and speed control. Then I identified the system parameters which are required in order to implement vector control. The experiments used were DC, Stall-signal phase, and no load. Finally I introduced the driver, which was designed by my department. In the implementation I used TMS320- 28335 digital signal processor (DSP) microcontroller, designed by Texas Instruments and the DSP control card which was produced by C.C.U. Auto-Control Lab. I then conducted the induction motor experiments on the driver and firmware in order to verify the feasibility of an induction motor vector control systems via a driver and DSP is acceptable.
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HSIAO, JA-TI, and 蕭家丁. "Design of Fuzzy Controller for Induction Motor." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/55904130111702000470.
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碩士國立海洋大學
電機工程學系
89
The main purpose of this thesis is to study the design of a fuzzy speed controller for the three-phase induction motor. The method of fuzzy theory is suitable for the analysis of multi-input multi-output (MIMO) nonlinear systems of which controllers are not easily implemented by classical methods. In the thesis, a preliminary set of control rules is constructed using Mamdani type of inference system and an input-output data set is generated from the preliminary set of control rules. Due to the compact and efficient form of linear representation of the Sugeno type fuzzy rules, a set of Sugeno type fuzzy control rules is then obtained from the input-output data set by employing the Adaptive Network-based Fuzzy Inference System (ANFIS). This set of Sugeno type fuzzy control rules, with the speed error and the change of speed error being input quantities, forms the speed controller for the three-phase induction motor. Moreover, the self-tuning mechanism is applied to improve the steady-state error. Through an experimental motor control system for the three-phase induction motor, the proposed fuzzy logic controller has been tested under several different operating conditions. The results illustrate that the proposed fuzzy controller has the features of robustness to load variation.
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Yang, Jyh Shiaan, and 楊智顯. "Servo Controller Design of AC Induction Motor." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/36398023896972971198.
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Keng-Yu, Tsai, and 蔡庚佑. "Design and Analysis of Induction Motor Speed Controllers." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/97281382715257514201.
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碩士國立臺灣科技大學
電機工程系
90
In this study, we study the induction motor speed controller. There are three design methods were proposed. The first design is that use the pole placement method to design the PI controller of the speed loop in induction motor speed controller. The second design is that use the Z-N frequency method to tune the parameters of the PI controller in the speed loop. The characteristic values used by Z-N frequency method are measured by Relay feedback method under different operating speeds. After that, a gain scheduling architecture is used to integrate all the PI controllers under different operating speeds. The third design is that apply the concept of variable structure control to design a fuzzy variable structure controller. A method of tuning the controller scaling factors is proposed. After the controller scaling factors are tuned for different operating speed, we use gain-scheduling architecture to integrate all the controller parameters. A real time PC-based motor controller development system is used to implement our designs. The experimental results shows that the second design and the third design can achieve better performance than the first design.
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Li, Chun-Fa, and 李俊發. "Design of Fuzzy Position Controller for Induction Motor." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/51866285170419471585.
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碩士國立海洋大學
電機工程學系
90
The main purpose of this thesis is to study the design of a fuzzy position controller for the three-phase induction motor. In the thesis, a preliminary set of control rules is constructed using Mamdani type of inference system and a set of Sugeno type fuzzy control rules is then obtained from the input-output data set by employing the Adaptive Network-based Fuzzy Inference System (ANFIS). This set of Sugeno type fuzzy control rules, with the position error and the change of position error being input quantities, forms the position controller for the three-phase induction motor. Moreover, the self-tuning mechanism is applied to improve the system performance on line and real time. Through an experimental motor control system for the three-phase induction motor, the proposed fuzzy logic controller has been tested under several different operating conditions. The results illustrate that the proposed fuzzy controller has the features of robustness to load variation.
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Liu, Sung-Chieh, and 劉松傑. "Nonlinear Controller Design for Induction Motor Servo System." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/44655114057767592247.
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Lee, Chun Jung, and 李俊融. "Design the DSP_Based Controller for Sensorless Induction Motor." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/78022171161092850542.
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碩士國立雲林科技大學
電機工程技術研究所
88
The purpose of this thesis is design the DSP_Based motor controller, the kernel system of this motor controller is a TMS320F240 which is produced from TI , Impose on signal convection between the DSP and PC, we can used MATLAB/SIMULINK on PC to design the any motor control law and impose this digital controller to do motor control . In the thesis identified the controller as practicability by sensorless vector controlled system, and used this digital controller to procure the parameter of motor and controller. We identified the parameter as accuracy by enjoy feedback of velocity vector controlled law. In this system we impose MATLAB/SIMULINK to design control law , it is convenience in analysis and proof, and the DSP in digital control board have the copious periphery and designing from program . Then we can used this motor control borad and the controlled law in PC to control motor, if we want to impose this controller to control another kind of motor such as DC Brushless motor and linear motor, just alter the program on DSP. Last, this thesis used this digital controller to achieve the vector control of sensorless induction motor. From the result can proof it has a best control competence and good performance for this control system.
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Chen, Chang-Sung, and 陳蒼松. "Computer Aided Design of Single-Phase Induction Motor." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/65600609417802672948.
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碩士國立海洋大學
電機工程學系
86
The computer has been applied to the design of electric apparatus for many years.In Taiwan,most of the computeraided design programs applied in the area of low-power electric machines such as single-phase induction motorare still working on Dos system.The main purpose of thisthesis is to develop a program that based on the personalcomputer(PC) under the environment of the populer operatingsystem,Microsoft Window95. This program,named Single-PhaseInduction Motor Design(SPIMD),is implemented by using theprogramming language of Visual Basic( Professional Edition).SPIMD performs data automatic processing ability,especiallyin wired code,table,curves,and iteration procedure.Besidesthe preceding function,SPIMD offer various other services,for example copious empirical data of single- phase inductionmotor design.The program package affords to improve the designand analysis efficiency is expected.
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Yu, Soon-Huang, and 游順煌. "Design and Implementation of Linear Induction Motor Drives." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/07449654371326034691.
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碩士國立臺灣科技大學
機械工程研究所
84
Owing to the difference between linear motor and rotary motor, like as end-effect, edge effect, skin effect, larger air gap and harmonic, unbalance phenomenon, and the normal force coupling effect , So the paper make the mathematical model and the equivalent circuit, and analysis the static and dynamic thrust-velocity characterictic, and improve the system performance. Using digital signal processor and the IGBT inverter module, with the technologies of vector control and voltage space PWM , design and implement a one-horsepower motor drives, also test the capability in rotary indiction motor. Taking account of the end-effect compensation in linear induction motor drives control law. And the method has control of effective flux, allowing a complicated induction motor to be treated as an ideal one, then a frequency compensation control follows to reduce error, then examines and improves the thrust- velocity performance. Finally, the paper accomplishes the velocity and position control under different loading conditions.
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陳敬岸. "Design and simulation of the sensorless induction motor drives." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/68293202435313123639.
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高耀智. "Analysis and design of microprocessor-based induction motor drives." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/06722598935899496869.
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Lee, Kuen-Chen, and 李坤城. "Design of Induction Motor Driver Using Field-Oriented Control." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/36278835110046607447.
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碩士國立交通大學
電機與控制工程學系
86
The principle of the Universal Field Oriented (UFO) control scheme can operate in any arbitrary reference frame. Due to its high degree of generality, the UFO controller is compatible with all the existing field oriented controller: rotor, stator and airgap flux field oriented controller. In this thesis, the stability regions of these three types of controllers are compared. However, correct estimation of the machine parameter is essential for all field oriented control scheme. If the estimated parameters is differ from the machine parameters, the detuning occurs and the drive performance become poor. In this thesis, generalized steady state torque and flux expression are derived analytically for dutuned operation of UFO controller in an arbitrary reference frame. Also, the parameter estimation of induction motor and systematic mathematical formulation is presented for designing motor controller. Simulation results are carried out to show that the performance of the UFO system, i.e., combined rotor, stator and airgap flux orientation. Also, rotor flux orientation with different controlled variable(current or voltage) are simulated and compared.
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Tsai, Meng-Jan, and 蔡孟展. "Neural Network Controller Design and Analysis for Induction Motor." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/31513404827134422093.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
93
Abstract The purpose of this thesis is to design and investigate the application of the self-tuning PI controller under indirect rotor-flux-oriented induction motor driver. In this paper, the controller use neural network concepts to provide speed control of induction motor that is robust to both the dynamic changes in plant parameters and the introduction of load disturbances. This neural netwrok is two layer and uesd RLS(Recurisive Least-Squares) Algorithm to minimize the difference between the motor’s actural response and that predicted by the neural estimator, and use pole placement method to determination the controller parameter. In the experimental setup, the control program is developed on the PC-Based motor controller development system, program coded in the MATLAB/SIMULINK are used for simulation and verification. The simulation and experimental results demonstrate that the neural network control attains good performances and have learning ability. Keyword：Neural Network、Recurisive Least-Squares、Self-tuning
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KAO, Hsu-chia, and 高旭佳. "Computer-Aided Design for Vector-Controlled Induction Motor Drives." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/04072742691462812790.
Full textAbstract:
碩士國立臺灣科技大學
電機工程系
87
This thesis develops the computer aided design techniques for vector-controlled induction motor drives, including both the simulation and experimental program design. The computer-aided design methods developed in this thesis provide time-saving and expedient advantages, which can compare various control structure and performance. During the computer-aided design process, the control system models are first constructed using the graphical module-based simulation models. Then, the simulation programs are translated into the execution files for implementation. Lastly, the simulation and experimental results are plotted and arranged in parallel for easy comparison. The feasibility of the proposed control techniques and their performance can then be evaluated. The hardware core is the PC-based digital control board. All the simulation and experimental program are developed under MATLAB, Simulink, and Real-Time Workshop. The system on which this thesis is based consists of the PC-based hardware board and the MATLAB, Simulink, and Real-Time Workshop software. The thesis starts form the construction of coordinate transformation and induction motor models. It then presents the vector control structures based on various field orientations. The thesis continues to present the CAD methods of controller parameter tuning, flux estimator design, speed and resistance estimator design, and motor parameter identification. For each topic, the simulation and implementation blocks are developed, along with both the simulation and experimental results. Using the PC-based motor control system, this thesis has contributed to the presentation and organization of the key techniques in the vector control of induction motor drives.
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Chiang, Kun-Lin, and 江坤霖. "Design and implementation of a sensorless induction motor drive." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/v6q88h.
Full textAbstract:
碩士國立臺北科技大學
電力電子產業研發碩士專班
98
The objective of this thesis is to design and implementation a sensorless induction motor drive. In order to find the rotor flux angle from stator voltages and currents by injecting high frequency signal. The difference of impedances between d axis and q axis of the measurement reference frame is introduced by analyzing the equivalent circuit of the induction machine. Using the difference of impedances caused by signal injecting to track the rotor flux angle and estimate synchronous speed. Experimental system of this thesis includes inverter, induction machine, digital signal interface CP1104 and dSPACE DS1104. The experimental results show that the high frequency injection method has stable performance, even under heavily loaded condition.
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Wen, Ya-Ting, and 溫雅婷. "Drive IC Design of Direct Torque Control Induction Motor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/b4mcda.
Full textAbstract:
碩士國立臺北科技大學
電機工程系研究所
97
The focus of this paper is the driver IC design of direct torque control (DTC) induction motor, and uses the hardware description language (Verilog) is composed of hardware architecture. The cell-based digital IC design flow is used to design this control IC. The main principle of the direct torque control architecture is controlled magnetism and torque of the stator. It could select suitable for switch sequence of the inverter to induce a fast response of the induction motor after calculating the module. First, the rotor speed obtains the value by speed controller module, and use of switching state to get the three-phase voltage and the three-phase current. Those transforms into the d-q static axis by abc-dq transformation module, which used to compute the stator’s magnetism and torque. By comparing with original values, those magnetism and torque will be calculated and set to new datas. The switching table and the hysteresis controller are decided with the new data and generated a voltage vector and to control the stator magnetism and torque. The system function is programming with the hardware description language, and examining the functionality work. To Complete this IC design of direct torque control induction motor by TSMC 0.18μm cell library, and the EDA tools which vendors were Synopsys and Candence are employed for circuit implementation, which included circuit synthesis, auto place and routing and design verification for chip implementation. Completes this IC design of direct torque control induction motor.
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Lau, Ming-Lun, and 劉銘倫. "Design the DSP-Based Vector Controller for Induction Motor." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/96807980233346226871.
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碩士國立雲林科技大學
電機工程系碩士班
91
The purpose of this thesis is the DSP_Based Vector Controller for induction motor.TMS320F240 is the kernel of the system produced in TI corporation.In order to design the achieve vector controller for induction motor,used DSP240 digital control board for PCI interface.At a PCI bus clock frequency of 33MHz,a transfer rate of 132Mbytes/sec and USB2.0 high speed of 480Mbps,the do vector control experience for induction motor,enable to response of velocity and current to ideal. Used Dual Port RAM for PCI interface which transfer data between PC and DSP.The motor control system applied Matlab/Simulink to design the DSP_Based vector controller and it is convenient to verify the proposed motor vector control theorem.
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Wu, Yi-Lang, and 吳義郎. "THE DESIGN OF DIGITAL CURRENT CONTROLLER FOR INDUCTION MOTOR." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/59856976869000217117.
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Wong, Yong-Sheng, and 王勇勝. "Design and Implementation of an Induction Motor Regenerative Braking Controller." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/82705651156780313771.
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碩士國立彰化師範大學
電機工程學系
95
This thesis designs and implements a speed control and regenerative braking system for an induction machine. The proposed systems consist of an inverter, an AC to DC power converter and a regenerative breaking controller. The proposed system regulates the DC inverter source and charges the regenerative electricity into the DC source. The inverter controls the induction motor speed in the motor mode. The inverter supplies the excitation current for the induction machine when operated in the generator mode. An AC to DC converter is designed as the AC and DC power gateway that transfers the kinematical and electrical energy. The breaking torque is controlled using a regenerative controller that controls the regenerative power charging current. The proposed approaches are simulated using CASPOC and implemented based on the digital signal processor (TMS320F240). The simulation and experimental results demonstrate that the proposed approaches have good regenerative braking control performances for an induction machine.
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Shyur, Dar-Ren, and 徐達仁. "Robust Controller Design for a Field-Oriented Controlled Induction Motor." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/28767400918533420406.
Full textAbstract:
碩士國立成功大學
電機工程研究所
83
A field-oriented controlled induction motor enbles decoupling control of touque and flux similar to the control of a seperate- ly excited dc motor. The conventional field-oriented control me- thod, although simple to implement, is sensitive to plant para- meters.Therefore,to solve the problem of performance degradation due to parameter variations and unmodelled uncertainties in a field-oriented controlled induction motor , a robust control scheme is proposed. In this thesis, the plant parameters and un- certainty analysis are estimated by measured data and system identification method. Furthermore, a robust controller is deve- loped by means of H-inf theoretical analysis technique and choosing weighting functions appropriately. As a result , the approach can achieve parameter-insensitive control responses with fast dynamic and robust performance. The effectiveness is verified by simulation and experiment.
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Lee, Tai-Hsing, and 李泰興. "Design of High- Performance V/F Control of Induction Motor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/d5yqh7.
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碩士崑山科技大學
電子工程研究所
97
In this paper, a stable and efficient control of the frequency of pure AC induction motor. AC induction motors is industrial motion control systems and home appliances in the most used motors commonly, structure simple, reliable, low-cost, low maintenance rate, and can be directly connected to AC power, These are the main advantages of AC induction motor.Since the microprocessor and technological progress , constantly improve its performance, gradually reduce the price,it is foreseeable future induction motor control technology will be widely used in various industries.
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Chang, Jun-Xian, and 張俊賢. "Characteristics Analyses and Design of Line-Start Synchronous Induction Motor." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2c9t3c.
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碩士國立臺灣大學
機械工程學研究所
107
There are many applications of motor in our life, from heavy industry to hand tools, according to different environments. Based on two kinds of characteristics, one of that is synchronous motor, has constant speed, small starting torque, stable speed and high efficiency when reaching synchronous speed; the other is induction motor, has simple and durable construction, low manufacturing cost. This study combines the characteristics of induction motor and synchronous reluctance motor to achieve a high efficient motor. The motor has squirrel-cage rotor conductors which likes an induction motor, can start up by the induction torque without relying on the motor driver. After it is synchronized it rotated by the reluctance torque due to flux barriers which makes the difference of inductance between d-axis and q-axis. Since it is rotated synchronous speed the induced current of rotor conductor bar is very small ,therefore the rotor copper loss is significantly reduced compare with the induction motor. First of all, this thesis starts with a common design method used in industrial, due to complete the squirrel-cage rotor shape and high winding factor, then adds the rotor geometry like barriers, by using ideal MMF distribution, can be suitably achieved by related objective functions like efficiency. In This thesis, a 750W prototype motor will be proof, and through the dynamometer to measure the performance likes efficiency and current in the rated state, and verify the simulation results, this motor successfully reached high efficiency output.
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Hsieh, Hui-Chung, and 謝輝中. "Design and Implementation of Vector Controller for induction Motor Drives." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/42uw29.
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碩士國立臺北科技大學
電機工程系所
97
The main theme of this thesis is to implement and design of the vector controller. The design of the PI controller parameters for rotor-flux oriented control, stator-flux oriented control, and air-gap-flux oriented control are included. SIMULINK is used for theory analysis, simulation and design Renesas SH-2 series CPU is used to develop control software. The experimental system includs: CPU control board, power stage driver board, and induction motor. The developed theory is verified by experiment results.
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Wang, Chien-Chih, and 王建智. "Computer-aided Design of a Three-Phase Linear Induction Motor." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/94799931801116557915.
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碩士桃園創新技術學院
機械工程系機械與機電工程碩士班
103
This paper presents the structure of the application of T type Semi-open parallel slots embedded-type ladder conductor to enhance the thrust of the linear induction motor (LIM).In the analysis, 12 cases combinations are achieved through calculating the type size of the motor, constructing geometric forms with graphic application, performing finite element method software to analyze 4 mobile substructure, and combining with 3 fixed sub-type. Compare the thrust and ripple force of these 12 combinations cases, ladder conductor with back iron increases the thrust, and decreases the effective air-gap, and it reveals the amplification of the thrust, as the simulation result. T type Semi-open parallel slots embedded-type ladder conductor possesses favorable thrust; this simulation data can be used as reference basis when estimating practical linear motor performances.
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張仕欣. "Rapid Design and Implement of Super Premium Efficiency Induction Motor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/90774116777867842791.
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碩士大葉大學
電機工程學系
105
Electrical motor is a mother of industry and widely used in industrial and household equipment. In recent years, in order to promote green energy and environmental protections in electric vehicles, fans, pumps and other related products, we have adopted super high-quality efficiency induction motors. Based on specifications of the IE4 efficiency classes of the International Electrotechnical Commission (IEC) in 2014, the efficiency optimization of induction motor is proposed and realized. A 2HP, 4Pole induction motor is implemented in this research. From the process improvement and feasibility of the induction motor manufacturing, this study demonstrated a high quality electromechanical technology. By studying the analytical solution, sensitivity analysis and numerical analysis of the finite element method, we obtain designed electrical parameters of this induction motor. According to that, a prototype had been manufactured and validated. Its efficiency reaches 89.7%, which is higher than the IE4 classes (IE4 class 88.5%), and operational temperature rises only 20.92℃. This study had provided a design to improve the efficiency of energy-saving induction motors. That will certainly open an opportunity to increase the quality of Taiwan electrical motors and selling quantity.
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Peng, Shao-Wei, and 彭紹瑋. "Design and thrust analysis of three-phase linear induction motor." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/82934562404909131744.
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碩士桃園創新技術學院
機械工程系機械與機電工程碩士班
104
This paper presents the thrust analysis on the structure of the application of semi-open parallel slots moving core ladder shape conductor, as well as the thrust relationship of the conductor with different thickness, based on both distributed and centralized windings. The study applies the data from the finite element analysis on distributed and centralized windings between magnetic flux density and the conductor, the thickness of ladder shape conductor of linear motor as the experimental factor of winding moving core, and finite element analysis to find out thrust behavior analysis of the linear motor. The simulative result of analysis shows that the structure of the application of semi-open parallel slots moving core ladder shape aluminum conductor can effectively improve linear motor thrust, and prove distributed winding, better than centralized one, can promote the thrust significantly. It can also be used as reference basis to develop linear motor.
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Tseng, Zen-Wei, and 曾仁煒. "Design of sensorless direct torque control for induction motor drives." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/56869396663235557393.
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碩士國立中央大學
電機工程研究所
91
Induction motors have been widely used in industry applications. According to its mechanical structure identities, the induction motor has a lot of advantages such as stable structure, low price, simplicity of maintenance and so on. Recently, vector control technique has been well developed, especially the direct torque control (DTC) algorithm. It has been shown that vector controlled induction motors have the properties as DC motors. Most high performance induction motor driver systems used the speed sensor to detect the feedback signal (rotor speed). However, using encoder would decrease the competitive advantage of induction motor and reduce the reliability of the system. To avoid using speed sensor, this thesis, firstly estimates the synchronous speed and slip speed from motor terminal voltages and currents. The difference of these two signals equals rotor speed, which is fed back to the speed control loop in the sensorless DTC speed control system. Experiment results show that this kind of sensorless direct torque control could not drive the system when loading. To solve this problem, a fuzzy slip-speed estimator is proposed. It is shown that the new estimator can estimate motor speed correctly and induce the torque effectively even in loading condition. Moreover, the accuracy of stator flux is critical to sensorless DTC system. To accurately estimate stator flux in low speed range, a new method is used to estimate stator flux, which effectively improves the performance of sensorless system at low speed range. The performance of the sensoless control system is investigated and verified experimentally.
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楊宗銘. "= Design and implementation of two-phase induction motor inverter drives." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/68971023644888480686.
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LIU, SHUN-CAI, and 劉順財. "Design and implementation of a quick response induction motor drive." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/70705653045703812975.
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Chis, Lucian. "Testing and modeling of the single-phase Written-Pole Motor." Thesis, 1998. http://hdl.handle.net/1957/33457.
Full textAbstract:
A relatively new development in the electric machines field has been the written-pole technology, of which the latest product is the large single-phase electric motor, the single phase Written-Pole Motor (WPM). The WPM is a synchronous, permanent-magnet single-phase motor having a weak rotor cage for start-up which in addition exhibits significant hysteresis effects at speeds below or above true synchronism. The electrical configuration of the WPM places it in the capacitor-start capacitor-run category of single-phase motors, due to the large size and need for an approximation of a round rather than elliptic rotating magnetic field.
This thesis presents the results of the research conducted by the author in the Motor Systems Resource Facility (MSRF) of the Electrical and Computer Engineering Department at Oregon State University. The thesis is structured into two main parts: Testing and Modeling.
The tests conducted on the WPM were trying to independently verify manufacturer's claims with regards to efficiency, power factor, robustness, power-outage ride-through and furthermore to study the behaviour of the machine during voltage sags, overvoltages and undervoltages. Tests were conducting in order to develop a
mathematical model from which the performance of the machine can be predicted.
The modeling efforts were concentrated in the development of a comprehensive model which would include all three major aspects of the WPM, and the performance of the resulting model was compared with the sampled data.Graduation date: 1999
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HONG, WEI-CHENG, and 洪偉城. "Design and simulation of variable-structure velocity controller for induction motor." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/24183204158757090533.
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TSAI, SHYAN NENG, and 蔡賢能. "Design and Implementation of Vector-Controlled AC Induction Motor without Encoder." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/80358813205047007618.
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碩士國立中山大學
電機工程研究所
84
Applying indirect vector-controlled method in this drivers, the induction motor's output torque and flux are decoupled like seperately excited DC Motor. But the variation of the parameters will influenece the response of the servo induction motor system used vector controlled method, we adopt Integral Variable Structure Model-following controller to overcome this problem in this paper. There are digital signal processor and power drivers in this servo induction motor drivers. Digital signal processor are used for the process of control sequence and calculation of the control law. Then by connecting the control circuit and power drivers, we finish this system's servo control. In this servo induction motor's drivers, the control law we apply include indirect vector control, and Integral Variable Structure Model Following control. The control circuit are used for the data's transform and transmission between the power drivers and microprocessor. And in many applied cases, it shows that they cant be mounted with speed sensors, so in this paper, we analyze the character of the AC Induction Motor Drivers system without encoder.
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Cheng, Hsin, and 鄭昕. "Design and Implementation of DSP-Based Simulation System of Induction Motor." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/04306249699223420420.
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碩士國立宜蘭大學
電機工程學系碩士班
100
This thesis proposes a DSP-Based induction motor simulation system, which uses the DSP chip and FPGA induction motor simulator to establish a low-cost and high safety induction motor simulation system which can replace the high-risk, bulky and expensive actual induction motor drive. The basic hardware architecture of the entire system includes an F2812 DSP development board which serves as the controller and an FPGA simulator proposed by the reference [1], which serves as the control device. And the building processes of the proposed simulation system can be divided into three stages. The first stage is the computer simulation stage. We use Matlab-Simulink® to simulate the control algorithm and confirm the feasibility of the overall architecture. Then, we simulate the induction motor constant V/f ratio control and rotor flux oriented control. The results of the computer simulation are used as references for debugging in the subsequent stages. The second stage is the emulation stage. In contrast to the computer simulation stage, the emulation stage will use the proposed simulation system to implement the constant V/f ratio open-loop control and rotor flux oriented control. This step can avoid equipment damage caused by controller program design error. Finally, the third stage is the actual validation stage. After confirming the correctness of control program, we connect the controller to the actual AC induction motor drive to implement the same control rule that is implemented in the emulation stage. Then we can prove the correctness of the proposed simulation system by showing the responses obtained in this stage, which are similar to the responses obtained in the emulation stage.
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Chiang, Ming-Che, and 江明哲. "Energy Efficiency-Improved Hysteresis Current Controllers Design for Induction Motor Drives." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/41894366043945445630.
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碩士國立東華大學
電機工程學系
102
In general, hysteresis current control on voltage-fed inverters is a simple and effective control method for AC motor drives. This is because the control method can give a good and fast transient response of the 3-phase currents. However, the drawbacks of the variable switching frequency and high-frequency harmonic are usually introduced in the motor drives. In this thesis, an adaptive hysteresis current control method for indirect field-oriented induction motor drive is presented. In the adaptive hysteresis current control, the hysteresis band is adaptively tuned according th the condition of the stator current and rotor flux so as to fix the switching frequency to decrease the high-frequency harmonics. After that, various dead-time schemes about delayed turning on and off of the power switches are proposed. From analysis of the testing results, a better dead-time scheme that can effectively reduce the power consumption and increase the power factor is given. To confirm the validity of the proposed methods, simulation results from a three-phase induction motor system are illustrated, and from the illustration, some conclusions are given for the proposed methods in this thesis.
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Sheu, Tsong-Terng, and 許聰藤. "Study and Design of Induction Motor Controller Based on Neural Network." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/50498981877983250475.
Full textAbstract:
博士國立成功大學
工程科學系
88
The study and design of induction motor controller based on a neural network is investigated in this dissertation. By means of a microprocessor, indirect field-oriented control method and some speed control strategies, the proposed robust control schemes, based on a neural network, focus on improving the dynamic behavior to achieve a high performance induction motor drive system. Our research consists of three main parts as expressed in the following. First, this dissertation proposes a self-tuning PI speed controller with a load torque observer and feed-forward compensation based on neural network identification for an induction motor. The widely used projection algorithm is used as the learning algorithm for this network, to minimize the difference between the motors'' actual response and that predicted by the neural estimator. The proposed neural estimator uses learning to automatically adjust the PI speed control parameters on-line, thereby achieving a desired reference trajectory. The load torque observer can estimate the load disturbance and feed-forward compensation such that the speed response of the induction motor is robust against the load disturbance. Next, we propose a model reference neural network controller for induction motor speed control based on a neural network plant estimator (NNPE) and a neural network PI controller (NNPIC). The NNPE is used to provide a real-time adaptive identification of the unknown motor dynamics. The NNPIC is used to produce an adaptive control force so that the motor speed can accurately track the model reference output. The widely used back-propagation algorithm and projection algorithm are used as the learning algorithms, respectively, in order to automatically adjust the weight parameters of the NNPE and NNPIC. To guarantee convergence and for faster learning, an approach that finds the boundaries of the adaptive learning rate was developed. The proposed robust control scheme can achieve a fairly good command tracking and regulating response to system parameter variations and external load torque disturbance. Because the inverter current switching control, measurement and the coupling characteristics of the mechanical shaft will produce some time delay in the induction motor drives, it is therefore more significant and reasonable to consider the time delay effects, parameter variations and load torque disturbance for robust induction motor control. This dissertation proposes a robust speed control for the induction motor drive with time delay. A time delay compensator (TDC) with a neural network controller was augmented to set the time delay element be effectively moved outside the closed loop such that the stability of the robust controlled system is enhanced. Furthermore, the model reference robust speed control and self-tuning robust speed control schemes, based on a neural network, were proposed to enhance the robustness of the induction motor drive with time delay. Finally, the proposed control scheme is superior to the conventional control method for induction motor drive speed control. The proposed control scheme was implemented with an experimental verification. Both computer simulations and experimental results have demonstrated that the proposed control scheme agrees with the theoretical analysis and can improve the induction motor drive performance with robust characteristics against the system parameter variations and external load torque disturbance.