Control of Medium-Voltage Drives at Very Low Switching Frequency
Control of Medium-Voltage Drives at Very Low Switching Frequency

Author: Nikolaos Oikonomou

Publisher: Logos Verlag Berlin GmbH

Published: 2008

Total Pages: 147

ISBN-13: 3832519904

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Medium-voltage ac drives are employed in numerous industrial setups that demand adjustable frequency. The present work focuses on the control of the voltage source inverter, which feeds the ac machine of the drive system with variable-frequency, switched voltage waveforms. The objective is to allow the inverter operate at very low switching frequency down to 200 Hz. The switching losses of the power semiconductors are then reduced which permits increasing the maximum load current of the inverter. Setting the switching frequency to very low values entails high harmonic distortion of the stator currents. The machine losses increase, as a consequence. To overcome this problem, synchronous optimal pulsewidth modulation is employed for inverter control; it minimizes the harmonic current at steady-state conditions. A fast controller is introduced: it eliminates harmonic excursions that occur when the operating point changes. Rather than the stator current, the method is based on the evaluation of an optimal stator flux linkage trajectory, which introduces insensitivity against variations of the machine parameters. A further issue of concern in the present work is the dynamic behavior of vector-controlled medium-voltage drives: low switching frequency values intensify the cross-coupling between torque and flux in vectorcontrolled systems. In a first approach, linear current controllers are designed in the frequency domain to compensate this undesired effect. A nonlinear controller is subsequently introduced, especially for operation at synchronous optimal modulation: it makes use of an optimal trajectory of the stator flux linkage vector to achieve deadbeat performance and complete decoupling.

Power Converters and AC Electrical Drives with Linear Neural Networks
Power Converters and AC Electrical Drives with Linear Neural Networks

Author: Maurizio Cirrincione

Publisher: CRC Press

Published: 2017-12-19

Total Pages: 661

ISBN-13: 1439818150

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The first book of its kind, Power Converters and AC Electrical Drives with Linear Neural Networks systematically explores the application of neural networks in the field of power electronics, with particular emphasis on the sensorless control of AC drives. It presents the classical theory based on space-vectors in identification, discusses control of electrical drives and power converters, and examines improvements that can be attained when using linear neural networks. The book integrates power electronics and electrical drives with artificial neural networks (ANN). Organized into four parts, it first deals with voltage source inverters and their control. It then covers AC electrical drive control, focusing on induction and permanent magnet synchronous motor drives. The third part examines theoretical aspects of linear neural networks, particularly the neural EXIN family. The fourth part highlights original applications in electrical drives and power quality, ranging from neural-based parameter estimation and sensorless control to distributed generation systems from renewable sources and active power filters. Simulation and experimental results are provided to validate the theories. Written by experts in the field, this state-of-the-art book requires basic knowledge of electrical machines and power electronics, as well as some familiarity with control systems, signal processing, linear algebra, and numerical analysis. Offering multiple paths through the material, the text is suitable for undergraduate and postgraduate students, theoreticians, practicing engineers, and researchers involved in applications of ANNs.

Applied Intelligent Control of Induction Motor Drives
Applied Intelligent Control of Induction Motor Drives

Author: Tze Fun Chan

Publisher: John Wiley & Sons

Published: 2011-01-19

Total Pages: 401

ISBN-13: 0470828285

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Induction motors are the most important workhorses in industry. They are mostly used as constant-speed drives when fed from a voltage source of fixed frequency. Advent of advanced power electronic converters and powerful digital signal processors, however, has made possible the development of high performance, adjustable speed AC motor drives. This book aims to explore new areas of induction motor control based on artificial intelligence (AI) techniques in order to make the controller less sensitive to parameter changes. Selected AI techniques are applied for different induction motor control strategies. The book presents a practical computer simulation model of the induction motor that could be used for studying various induction motor drive operations. The control strategies explored include expert-system-based acceleration control, hybrid-fuzzy/PI two-stage control, neural-network-based direct self control, and genetic algorithm based extended Kalman filter for rotor speed estimation. There are also chapters on neural-network-based parameter estimation, genetic-algorithm-based optimized random PWM strategy, and experimental investigations. A chapter is provided as a primer for readers to get started with simulation studies on various AI techniques. Presents major artificial intelligence techniques to induction motor drives Uses a practical simulation approach to get interested readers started on drive development Authored by experienced scientists with over 20 years of experience in the field Provides numerous examples and the latest research results Simulation programs available from the book's Companion Website This book will be invaluable to graduate students and research engineers who specialize in electric motor drives, electric vehicles, and electric ship propulsion. Graduate students in intelligent control, applied electric motion, and energy, as well as engineers in industrial electronics, automation, and electrical transportation, will also find this book helpful. Simulation materials available for download at www.wiley.com/go/chanmotor

High Performance Control of AC Drives with Matlab / Simulink Models
High Performance Control of AC Drives with Matlab / Simulink Models

Author: Haitham Abu-Rub

Publisher: John Wiley & Sons

Published: 2012-04-13

Total Pages: 460

ISBN-13: 1119942101

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A comprehensive guide to understanding AC machines with exhaustive simulation models to practice design and control Nearly seventy percent of the electricity generated worldwide is used by electrical motors. Worldwide, huge research efforts are being made to develop commercially viable three- and multi-phase motor drive systems that are economically and technically feasible. Focusing on the most popular AC machines used in industry – induction machine and permanent magnet synchronous machine – this book illustrates advanced control techniques and topologies in practice and recently deployed. Examples are drawn from important techniques including Vector Control, Direct Torque Control, Nonlinear Control, Predictive Control, multi-phase drives and multilevel inverters. Key features include: systematic coverage of the advanced concepts of AC motor drives with and without output filter; discussion on the modelling, analysis and control of three- and multi-phase AC machine drives, including the recently developed multi-phase-phase drive system and double fed induction machine; description of model predictive control applied to power converters and AC drives, illustrated together with their simulation models; end-of-chapter questions, with answers and PowerPoint slides available on the companion website www.wiley.com/go/aburub_control This book integrates a diverse range of topics into one useful volume, including most the latest developments. It provides an effective guideline for students and professionals on many vital electric drives aspects. It is an advanced textbook for final year undergraduate and graduate students, and researchers in power electronics, electric drives and motor control. It is also a handy tool for specialists and practicing engineers wanting to develop and verify their own algorithms and techniques.

High Performance Control of AC Drives with Matlab/Simulink
High Performance Control of AC Drives with Matlab/Simulink

Author: Haitham Abu-Rub

Publisher: John Wiley & Sons

Published: 2021-04-06

Total Pages: 624

ISBN-13: 1119591295

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High Performance Control of AC Drives with Matlab®/Simulink Explore this indispensable update to a popular graduate text on electric drive techniques and the latest converters used in industry The Second Edition of High Performance Control of AC Drives with Matlab®/Simulink delivers an updated and thorough overview of topics central to the understanding of AC motor drive systems. The book includes new material on medium voltage drives, covering state-of-the-art technologies and challenges in the industrial drive system, as well as their components, and control, current source inverter-based drives, PWM techniques for multilevel inverters, and low switching frequency modulation for voltage source inverters. This book covers three-phase and multiphase (more than three-phase) motor drives including their control and practical problems faced in the field (e.g., adding LC filters in the output of a feeding converter), are considered. The new edition contains links to Matlab®/Simulink models and PowerPoint slides ideal for teaching and understanding the material contained within the book. Readers will also benefit from the inclusion of: A thorough introduction to high performance drives, including the challenges and requirements for electric drives and medium voltage industrial applications An exploration of mathematical and simulation models of AC machines, including DC motors and squirrel cage induction motors A treatment of pulse width modulation of power electronic DC-AC converter, including the classification of PWM schemes for voltage source and current source inverters Examinations of harmonic injection PWM and field-oriented control of AC machines Voltage source and current source inverter-fed drives and their control Modelling and control of multiphase motor drive system Supported with a companion website hosting online resources. Perfect for senior undergraduate, MSc and PhD students in power electronics and electric drives, High Performance Control of AC Drives with Matlab®/Simulink will also earn a place in the libraries of researchers working in the field of AC motor drives and power electronics engineers in industry.

Sensorless Control of AC Motor Drives
Sensorless Control of AC Motor Drives

Author: Kaushik Rajashekara

Publisher: Institute of Electrical & Electronics Engineers(IEEE)

Published: 1996

Total Pages: 0

ISBN-13: 9780780310469

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Inhalt: The purpose of this book is to review the various schemes and methodologies used for speed sensorless operation of induction motors an position sensorless operation of permanent magnet, synchronous reluctance, and switched reluctance motors. Various sensorless control strategies are reviewed based on the papers published in IEEE transactions and conferences and in other international journals.

Advanced Linear Machines and Drive Systems
Advanced Linear Machines and Drive Systems

Author: Wei Xu

Publisher: Springer Nature

Published: 2019-09-07

Total Pages: 371

ISBN-13: 9811396167

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This book collects the latest theoretical and technological concepts in the design and control of various linear machines and drive systems. Discussing advances in the new linear machine topologies, integrated modeling, multi-objective optimization techniques, and high-performance control strategies, it focuses on emerging applications of linear machines in transportation and energy systems. The book presents both theoretical and practical/experimental results, providing a consistent compilation of fundamental theories, a compendium of current research and development activities as well as new directions to overcome critical limitations.

Position Sensorless Control Techniques for Permanent Magnet Synchronous Machine Drives
Position Sensorless Control Techniques for Permanent Magnet Synchronous Machine Drives

Author: Gaolin Wang

Publisher: Springer Nature

Published: 2019-11-15

Total Pages: 305

ISBN-13: 9811500509

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The book focuses on position sensorless control for PMSM drives, addressing both basic principles and experimental evaluation. It provides an in-depth study on a number of major topics, such as model-based sensorless control, saliency-based sensorless control, position estimation error ripple elimination and acoustic noise reduction. Offering a comprehensive and systematic overview of position sensorless control and practical issues it is particularly suitable for readers interested in the sensorless control techniques for PMSM drives. The book is also a valuable resource for researchers, engineers, and graduate students in fields of ac motor drives and sensorless control.

Intelligent Algorithms for Analysis and Control of Dynamical Systems
Intelligent Algorithms for Analysis and Control of Dynamical Systems

Author: Rajesh Kumar

Publisher: Springer Nature

Published: 2020-10-31

Total Pages: 202

ISBN-13: 9811580456

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This book explores various intelligent algorithms including evolutionary algorithms, swarm intelligence-based algorithms for analysis and control of dynamical systems. Both single-input–single-output (SISO) and multi-input–multi-output (MIMO) systems are explored for analysis and control purposes. The applications of intelligent algorithm vary from approximation to optimal control design. The applications of intelligent algorithms not only improve understanding of a dynamical system but also enhance the control efficacy. The intelligent algorithms are now readily applied to all fields of control including linear control, nonlinear control, digital control, optimal control, etc. The book also discusses the main benefits attained due to the application of algorithms to analyze and control.