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The switched reluctance motor has the advantages of the low production cost, high operating efficiency, high stability, and high start torque. It can deliver a wide speed range, and therefore make it very attractive to the engineers and researchers. The double salient structure of SRM result in a non-linear stator inductance, so the output reluctance torque has a highly non-linear behavior. A digital signal processor based drive system for SRM is developed and implemented in this thesis using the TI TMS320F240 DSP system which is with universal peripheral interface circuits. The built-in pulse width modulation(PWM) module of the DSP system can auto-generate PWM output signal by setting the relative registers to simplify the hardware design. This research built a complete drive system for SRM, both the closed-loop velocity controller and current compensator were designed according to the proportional-integral(PI) control mechanism, and all schemes were coded in the DSP program. Simulation and experiment results demonstrate that the proposed drive system makes reluctance torque output very smoothly with a preferable velocity response.

Η παρούσα διπλωματική εργασία πραγματεύεται το σχεδιασμό και την κατασκευή διάταξης φόρτισης ενός ηλεκτροκινητήριου συστήματος. Η εργασία αυτή εκπονήθηκε στο Εργαστήριο Ηλεκτρομηχανικής Μετατροπής Ενέργειας του Τμήματος Ηλεκτρολόγων Μηχανικών και Τεχνολογίας Υπολογιστών της Πολυτεχνικής Σχολής του Πανεπιστημίου Πατρών. Στα πλαίσια του θεσμού της πρακτικής άσκησης του τμήματος, ένα τμήμα της εργασίας αυτής εκπονήθηκε στο τεχνικό γραφείο ΛΙΑΣΚΟΣ Ο.Ε. Σκοπός είναι η κατασκευή ενός μετατροπέα πλήρους γέφυρας, που θα ελέγχει κατάλληλα μια μηχανή ξένης διέγερσης, η οποία συνδέεται μέσω ενός συστήματος μετάδοσης μ’ έναν κινητήρα με τελικό σκοπό την φόρτιση του κινητήρα με επιθυμητές ροπές για μελέτη της λειτουργικής συμπεριφοράς του. Αρχικά αναλύθηκε ένα ηλεκτροκινητήριο σύστημα και μελετήσαμε τα επιμέρους τμήματα που το αποτελούν. Παρουσιάζονται διάφορα είδη φορτίων με τις αντίστοιχες χαρακτηριστικές ροπής-στροφών καθώς και εφαρμογές που χρησιμοποιούνται. Επίσης αναλύθηκε συνοπτικά η μηχανή συνεχούς ρεύματος. Στη συνέχεια αναλύθηκε ο μετατροπέας πλήρους γέφυρας, οι τρόποι λειτουργίας του, με τους οποίους μπορεί να ελέγξει τη μηχανή συνεχούς ρεύματος ώστε να λειτουργεί στα τέσσερα τεταρτημόρια, ενώ ιδιαίτερη προσοχή δόθηκε στην ανάλυση των μεθόδων κατάλληλης παλμοδότησης των διακοπτικών στοιχείων. Στο επόμενο βήμα πραγματοποιήθηκε η προσομοίωση τόσο των επιμέρους συστημάτων όσο και του ολικού συστήματος, με σκοπό να εξακριβωθεί η ορθή λειτουργία του πριν την κατασκευή. Οι προσομοιώσεις πραγματοποιήθηκαν με την βοήθεια του λογισμικού Simulink του Matlab . Τέλος κατασκευάζεται η πειραματική διάταξη για να ληφθούν τα πειραματικά αποτελέσματα και να συγκριθούν με τα θεωρητικά, ώστε να εντοπιστούν και να δικαιολογηθούν τυχόν διαφορές μεταξύ της θεωρητικής ανάλυσης και των μετρήσεων στην πραγματική διάταξη, καθώς και για να εκτιμηθεί η απόδοση του συστήματος. / This thesis deals with the design and construction of a torque simulator device for an electrcic drive system. The thesis was conducted in the Laboratory of Electromechanical Energy Conversion, Department of Electrical and Computer Engineering of the University of Patras. The aim is to build a full-bridge converter, which will properly control a separately fed dc-machine, which is connected via a transmission system with a motor. The final goal is to load the engine with the desirable torque, in order to study it’s functional behavior. Initially we analyzed an electric drive system and studied the individual parts that make it up. We presented various kinds of loads with their corresponding torque-speed characteristic and applications in which they are used. We also analyzed, succinctly, the functional behavior of a DC machine. Then we analyzed the full-bridge inverter and it’s modes of operation, through which the DC machine can be controlled and operate in all four quadrants. Afterwards, methods for the proper pulse-control strategy of switching elements were studied. The next step was the simulation of both, subsystems as long as the overall system, in order to check the proper operation before construction. The simulations were performed using the software Simulink of Matlab. Finally the experimental setup was constructed, in order to obtain the experimental results and to compare them with the theoretical, to identify and justify any differences between the theoretical analysis and measurements on the real device, and to evaluate the system performance.

This thesis presents the development of an in-wheel drive system consisting of an axial-flux switched-reluctance motor and a hub suspension. The motor is designed using Maxwell's stress tensor and numerical analysis techniques, including FEA and transient numerical simulations. A new integral inductance function is introduced that improves the accuracy of the motor model, and a new in-phase current-shaping technique is implemented using a fuzzy controller to extend the constant-power region of the motor. The hub suspension system is simulated using a half-car model with 6 degrees of freedom, and the overall torque, power, and efficiency of the drive system is calculated. A peak torque of 500[Nm] is developed at the high end of the drive system's speed range, and the hub suspension system is shown to eliminate the impact of the motor's increased unsprung mass on vehicle handling.

This Master’s thesis is focused on capatilibities of software SinuTrain. In the first part there is a summary of drive systems and a research of their share in the marketplace. In the next part debates abilities and some methods of programming. The last part devotes to practical demonstrations of production of some parts of mine draft and simulation of their production.

Indiana University-Purdue University Indianapolis (IUPUI) / This thesis proposes a remotely controlled motor drive system which is able to supply a regulated voltage for both DC and AC motors. The proposed system integrates two different technologies, each of which belongs to the field of wireless communications and semiconductor power electronics. The introduction highlights the literature review and technical contributions in these two electrical engineering fields. The pulse width modulated control algorithm for speed control is discussed in detail. Incorporating the zigbee wireless technology into the motor drive system, for the speed control of an AC and a DC motor, by implementing digital pulse width modulation technique is the aim of this thesis. The main characteristics of the proposed system are: 1) its universal feature since it can feed either DC or AC motor without changing the hardware, 2) remotely controlled, which allows the end-user to control the motor speed safely from a remote distance, 3) flexibility in installation of the motor drives in areas that are not easily accessible by end-users, and 4) uninterrupted speed control for distance of up to few 100 feet.

This thesis proposes a novel algorithm to optimize multi-modal, nonlinear, black-box objective functions for electric power system design using an electromagnetic transients (EMT) simulator. The algorithm discovers multiple local optimal solutions for a given complex power system, and then generates accurate surrogate models of an objective function around each discovered local optimal solution. These surrogate models represent the local behaviour of the objective function that can be used in the subsequent stages of sensitivity analyses. Using surrogate models instead of intensive transient simulation during sensitivity analysis reduces computational intensity and simulation time. This makes the proposed algorithm particularly suited for optimization of computationally expensive black-box functions. The stages of the algorithm can be implemented independently and hence the computations can be done in parallel. Therefore, the algorithm is implemented in a parallel environment to gain significant speed-up in the design of electric power systems. Comparative studies in terms of objective function evaluation and computation time are provided. Using several multi-modal benchmark objective functions, the superiority of the proposed algorithm compared to other recently developed algorithms is demonstrated. Additionally, the application of the algorithm in the design process of complex electric power system demonstrated through several examples. The case studies show that the parallelized algorithm provides computational savings up to 39 times compared to the conventional sequential approach. / May 2016

The transformation of Joint forces to be lighter, more lethal, and capable of deploying from multiple dispersed locations free of prepared landing zones requires a dedicated heavy lift VTOL aircraft capable of rapidly delivering large payloads, such as the 20 to 26 ton Future Combat System, at extended ranges in demanding terrain and environmental conditions. Current estimates for a single main rotor configuration place the design weight over 130,000 pounds with an installed power of approximately 30,000 horsepower. Helicopter drive systems capable of delivering torque of this magnitude succeeded in the Russian Mi-26 helicopters split-torque design and the Boeing VERTOL Heavy Lift Helicopter (HLH) prototypes traditional multi-stage planetary design. The square-cube law and historical trends show that the transmission stage weight varies approximately as the two-thirds power of torque; hence, as the size and weight of the vehicle grows, the transmissions weight becomes an ever-increasing portion of total gross weight. At this scale, optimal gearbox configuration and component design holds great potential to save significant weight and reduce the required installed power. The drive system design methodology creates a set of integrated tools to estimate system weight and rapidly model the preliminary design of drives system components. Tools are provided for gearbox weight estimation and efficiency, gearing, shafting, and cooling. Within the same architecture, the designer may add similar tools to model subcomponents such as support bearings, gearbox housing, freewheeling units, and rotor brakes. Measuring the relationships between key design variables and system performance metrics reveals insight into the performance and behavior of a heavy lift drive system. A parametric study of select design variables is accomplished through an intelligent Design of Experiments that utilizes Response Surface Methodology to build a multivariate regression weight model. The model permits visualization of the design space and assists in optimization of the drive system preliminary design. This methodology is applied to both the Boeing HLH and the Russian Mi-26 main gearboxes. This study applies the drive system design methodology to compare the Mi-26 split-torque gearbox over the Boeing HLH multi-stage planetary gearbox in a single main rotor heavy lift helicopter.

A method to find solutions to multi-objective design problems that involve poor information available was proposed. The method quantified the designers intuition in a systematic manner, and utilized it to approximate inaccurate and/or vague numbers. In the context of possibility theory, uncertain values were expressed through possibility distributions, i.e. fuzzy membership functions. Based on the membership functions of the value, levels of confidence of the solutions to multi-objective problems were defined through the notions of possibility and necessity. An evolutionary algorithm was modified to find sets of solutions that allow certain levels of confidence instead of the crisp sets of the solutions. The method was applied to a design problem of the gyrodyne configuration and sets of the solutions of the specified possibility and necessity were found. The results of the design problem and the suggestions for future research were discussed.