Electric Motors and Drives

Electric Motors and Drives

Helps users acquire knowledge and understanding of the capabilities and limitations of motors and drives without struggling through unnecessary math and theory Presents updated material on the latest and most widely-used motors and drives, ...

Author: Austin Hughes

Publisher: Newnes

ISBN: 9780128189252

Category: Science

Page: 511

View: 767

Electric Motors and Drives: Fundamentals, Types and Applications, Fifth Edition is intended primarily for non-specialist users or students of electric motors and drives, but many researchers and specialist industrialists have also acknowledged its value in providing a clear understanding of the fundamentals. It bridges the gap between specialist textbooks (too analytical for the average user) and handbooks (full of detail but with little insight) providing an understanding of how each motor and drive system works. The fifth edition has been completely revised, updated and expanded. All of the most important types of motor and drive are covered, including d.c., induction, synchronous (including synchronous reluctance and salient Permanent Magnet), switched reluctance, and stepping. There has been significant innovation in this area since the fourth edition, particularly in the automotive, aircraft and industrial sectors, with novel motor topologies emerging, including hybrid designs that combine permanent magnet and reluctance effects. We now include a physical basis for understanding and quantifying torque production in these machines, and this leads to simple pictures that illuminate the control conditions required to optimise torque. The key converter topologies have been brought together, and the treatment of inverter switching strategies expanded. A new chapter is devoted to the treatment of Field Oriented control, reflecting its increasing importance for all a.c. motor drives. A unique physically-based approach is adopted which builds naturally on the understanding of motor behaviour developed earlier in the book: the largely non-mathematical treatment dispels much of the mystique surrounding what is often regarded as a difficult topic. Helps users acquire knowledge and understanding of the capabilities and limitations of motors and drives without struggling through unnecessary math and theory Presents updated material on the latest and most widely-used motors and drives, including brushless servo motors Includes additional diagrams and worked examples throughout this updated edition Includes a physical basis for the understanding and quantifying torque production
Categories: Science

Electric Motors and Drives

Electric Motors and Drives

Written for non-specialist users of electric motors and drives, this book explains how electric drives work and compares the performance of the main systems, with many examples of applications.

Author: Austin Hughes

Publisher: Elsevier

ISBN: 9780080505152

Category: Technology & Engineering

Page: 352

View: 444

Written for non-specialist users of electric motors and drives, this book explains how electric drives work and compares the performance of the main systems, with many examples of applications. The author's approach - using a minimum of mathematics - has made this book equally popular as an outline for professionals and an introductory student text. * First edition (1990) has sold over 6000 copies. Drives and Controls on the first edition: 'This book is very readable, up-to-date and should be extremely useful to both users and o.e.m. designers. I unhesitatingly recommend it to any busy engineer who needs to make informed judgements about selecting the right drive system.' New features of the second edition: * New section on the cycloconverter drive. * More on switched relectance motor drives. * More on vector-controlled induction motor drives. * More on power switching devices. * New 'question and answer' sections on common problems and misconceptions. * Updating throughout. Electric Motors and Drives is for non-specialist users of electric motors and drives. It fills the gap between specialist textbooks (which are pitched at a level which is too academic for the average user) and the more prosaic 'handbooks' which are filled with useful detail but provide little opportunity for the development of any real insight or understanding. The book explores most of the widely-used modern types of motor and drive, including conventional and brushless d.c., induction motors (mains and inverter-fed), stepping motors, synchronous motors (mains and converter-fed) and reluctance motors.
Categories: Technology & Engineering

Energy Efficiency Improvements in Electric Motors and Drives

Energy Efficiency Improvements in Electric Motors and Drives

In industry, a motor consumes an annual quantity of electricity which corresponds to approximately 5 times its purchase price, throughout its whole life of aroun~ 12 to 20 years. Motors are by far the most important type of electric load.

Author: Anibal de Almeida

Publisher: Springer Science & Business Media

ISBN: 9783642608322

Category: Technology & Engineering

Page: 511

View: 917

The reduction of energy consumption through improvements in energy efficiency has become an important goal for all countries, in order to improve the efficiency of the economy, to increase energy supply security, and to reduce the emissions of CO and other pollutants caused by power· generation. 2 Electric motors use over half of all electricity consumed in developed countries. Typically 60-80% of the electricity which is used in the industrial sector and about 35% of the electricity used in the commercial sector in the European Union is consumed by motors. In industry, a motor consumes an annual quantity of electricity which corresponds to approximately 5 times its purchase price, throughout its whole life of aroun~ 12 to 20 years. Motors are by far the most important type of electric load. They are used in all sectors and in a wide range of applications, namely the following: fans, compressors, pumps, mills, winders, elevators, transports, home appliances, and office equipment, etc. It is their wide use that makes motor drive systems one of the main targets to achieve significant energy savings. As motors are the largest USers of electrical energy, even small efficiency improvements will produce very large energy savings.
Categories: Technology & Engineering

Electric Motor Drives 1 e

Electric Motor Drives  1 e

The text is spread across twenty chapters under the five broad clusters, namely electric motor drive characteristics, DC motor drives, AC motor drives, special motor drives and industrial drive applications.

Author: Rajini

Publisher: Pearson Education India

ISBN: 9789353941338

Category:

Page: 649

View: 229

Electric motor drives aim to provide an in-depth understanding of the working of various types of electrical motor drives. The text is spread across twenty chapters under the five broad clusters, namely electric motor drive characteristics, DC motor drives, AC motor drives, special motor drives and industrial drive applications. Matlab programs and psim simulations featured in the text aids in determining the characteristics of electric motor drives and machines and offers a profound new perspective in the design of power electronic circuits and controllers for electric motors.
Categories:

Electric Motors and Drives

Electric Motors and Drives

We will also see later that although the magnetic Weld (or 'excitation') is essential
to the working of the motor, it acts only as a catalyst, and all of the mechanical
output power comes from the electrical supply to the conductors on which the ...

Author: Austin Hughes

Publisher: Elsevier

ISBN: 0080522041

Category: Technology & Engineering

Page: 384

View: 986

Electric Motors and Drives is intended for non-specialist users of electric motors and drives, filling the gap between theory-based academic textbooks and the more prosaic 'handbooks', which provide useful detail but little opportunity for the development of real insight and understanding. The book explores all of the widely-used modern types of motor and drive, including conventional and brushless D.C., induction motors and servo drives, providing readers with the knowledge to select the right technology for a given job. Austin Hughes' approach, using a minimum of maths, has established Electric Motors and Drives as a leading guide for engineers, and the key to a complex subject for a wider readership, including technicians, managers and students. Acquire essential practical knowledge of motors and drives, with a minimum of math and theory Updated material on the latest and most widely-used modern motors and drives New edition includes additional diagrams and worked examples throughout
Categories: Technology & Engineering

Control of Electric Motors and Drives Via Convex Optimization

Control of Electric Motors and Drives Via Convex Optimization

This is one of our main points in this work: techniques and technologies now exist for controlling unconventional electric motors.

Author: Nicholas Moehle

Publisher:

ISBN: OCLC:1039526164

Category:

Page:

View: 439

Electric motors and drives have been in common use for more than a century. Traditionally, alternating-current electric motors are driven by applying symmetric, multiphase sinusoidal voltage waveforms to their terminals. However, due to the wide availability of switching power converters as well as microcontrollers for controlling them, it is now possible to drive motors using specialized, nonsinusoidal waveforms, allowing us to design the drive voltage waveform along with the motor. This is one of our main points in this work: techniques and technologies now exist for controlling unconventional electric motors. We first consider optimal voltage and current waveform design for electric motors, then considers the design of feedback controllers for switched-mode power converters that could be used to implement these waveforms. First we give energy-optimal current waveforms for a permanent magnet synchronous motor that result in a desired average torque. Our formulation generalizes previous work by including a general back-EMF wave shape, voltage and current limits, an arbitrary phase winding connection, a simple eddy current loss model, and a trade-off between power loss and torque ripple. Determining the optimal current waveforms requires solving a convex optimization problem. We show how to use the alternating direction method of multipliers to find the optimal current in milliseconds or hundreds of microseconds, depending on the processor used, which allows the possibility of generating optimal waveforms in real time. We next present a method for finding current waveforms for induction motors that minimize resistive loss while achieving a desired average torque output. Our method is not based on reference-frame theory for electric machines, and therefore directly handles induction motors with asymmetric winding patterns, nonsinusoidally distributed windings, and a general winding connection. We do not explicitly handle torque ripple or voltage constraints. Our method is based on converting the torque control problem to a nonconvex linear-quadratic control problem, which can be solved by using a (tight) semidefinite programming relaxation. We then address the problem of finding current waveforms for a switched reluctance motor that minimize a user-defined combination of torque ripple and RMS current. The motor model we use is fairly general, and includes magnetic saturation, voltage and current limits, and highly coupled magnetics (and therefore, unconventional geometries and winding patterns). We solve this problem by approximating it as a mixed-integer convex program, which we solve globally using branch and bound. We demonstrate our approach on an experimentally verified model of a fully pitched switched reluctance motor, for which we find the globally optimal waveforms, even for high rotor speeds. After considering the motor design problem, we consider control of switched-mode power electronic converters. First we consider the theoretical problem of controlling general switched-affine dynamical systems i.e., the problem of selecting a sequence of affine dynamics from a finite set in order to minimize a sum of convex functions of the system state. We develop a new reduction of this problem to a mixed-integer convex program (MICP), based on perspective functions. Relaxing the integer constraints of this MICP results in a convex optimization problem, whose optimal value is a lower bound on the original problem value. We show that this bound is at least as tight as similar bounds obtained from two other well-known MICP reductions (via conversion to a mixed logical dynamical system, and by generalized disjunctive programming), and our numerical study indicates it is often substantially tighter. Finally, we consider the problem of controlling switched-mode power converters using model predictive control. Model predictive control requires solving optimization problems in real time, limiting its application to systems with small numbers of switches and a short horizon. We propose a technique for using off-line computation to approximate the model predictive controller. This is done by dividing the planning horizon into two segments, and using a quadratic function to approximate the optimal cost over the second segment. The approximate model predictive algorithm minimizes the true cost over the first segment, and the approximate cost over the second segment, allowing the user to adjust the computational requirements by changing the length of the first segment. We conclude with two simulated examples.
Categories:

Electric Drives and Electromechanical Systems

Electric Drives and Electromechanical Systems

The focus of this book on the selection and application of electrical drives and control systems for electromechanical and mechatronics applications makes it uniquely useful for engineers in industry working with machines and drives.

Author: Richard Crowder

Publisher: Elsevier

ISBN: 0080492649

Category: Technology & Engineering

Page: 312

View: 847

The focus of this book on the selection and application of electrical drives and control systems for electromechanical and mechatronics applications makes it uniquely useful for engineers in industry working with machines and drives. It also serves as a student text for courses on motors and drives, and engineering design courses, especially within mechanical engineering and mechatronics degree programs. The criteria for motor-drive selection are explained, and the main types of drives available to drive machine tools and robots introduced. The author also provides a review of control systems and their application, including PLCs and network technologies. The coverage of machine tools and high-performance drives in smaller applications makes this a highly practical book focused on the needs of students and engineers working with electromechanical systems. * An invaluable survey of electric drives and control systems for electromechanical and mechatronics applications * Essential reading for electrical and mechanical engineers using motors and drives * An ideal electric motors and drives text for university courses including mechatronics
Categories: Technology & Engineering

Energy Efficiency Improvements in Electronic Motors and Drives

Energy Efficiency Improvements in Electronic Motors and Drives

The 1997 Kyoto Conference defined CO2 emISSIOn targets for the developed regions of the world.

Author: Paolo Bertoldi

Publisher: Springer Science & Business Media

ISBN: 9783642597855

Category: Technology & Engineering

Page: 574

View: 763

The 1997 Kyoto Conference defined CO2 emISSIOn targets for the developed regions of the world. The EU target of decreasing the emissions 8% below the 1990 level, by 2010, will require a very substantial effort covering basically all activities if such a target is to be reached. Energy-efficient motor systems can provide one of the most important opportunities to achieve electricity savings in a cost effective way, avoiding at the same time the emission of tens of millions of tons of carbon. The reduction of energy consumption through improvements in energy efficiency is one of the major instruments for developed and developing countries to meet the Kyoto commitments. Energy efficiency is also a key element of the European Union (EU) energy policy, since it improves the efficiency of the economy, increases energy supply security, and decreases harmful emissions due to electricity generation. Electric motor systems use over half of all electricity consumed in developed countries. Typically about 70% of the electricity which is used in the industrial sector and about 35% of the electricity used in the commercial sector in the EU is consumed by motor systems. In industry, a motor on average consumes an annual quantity of electricity which corresponds to approximately 5 times its purchase price, throughout its whole life of around 12 to 20 years.
Categories: Technology & Engineering

Electric Motors And Drives

Electric Motors And Drives

Electric Motor Diagram How much does an electric motor cost? This book completes with circuit diagrams and thorough explanations of the most common motor starting methods - and challenges.

Author: Sheena Leith

Publisher:

ISBN: 9798724171304

Category:

Page: 50

View: 904

What is an electric motor and how does it work? Electricity Of Generator Which electric motor is best? Electric Stove Uses An Electric Motor What are an electric motor and its types? Electric Motor Diagram How much does an electric motor cost? This book completes with circuit diagrams and thorough explanations of the most common motor starting methods - and challenges. It has something to offer anyone keen to learn new things, while at the same time assisting practicing electrical engineers to design and implement reliable and functional motor starters.
Categories:

Electric Motor Drives

Electric Motor Drives

Electronic Control of Machines develops a systematic approach to motor drives. This book places emphasis on practice through the use of extensive modeling, simulation and analysis to help readers better understand the subject.

Author: Ramu Krishnan

Publisher: Pearson

ISBN: PSU:000054103771

Category: Technology & Engineering

Page: 626

View: 134

Electronic Control of Machines develops a systematic approach to motor drives. This book places emphasis on practice through the use of extensive modeling, simulation and analysis to help readers better understand the subject. Detailed industrial applications help readers relate theory to practice. KEY TOPICS: This extensive book cover numerous topics including: system level analysis, design and integration of the motor drives; and modeling and analysis of electrical machines and drive systems. MARKET: For readers with an interest in electric drives and power electronics.
Categories: Technology & Engineering

Electric Motor Drive Installation and Troubleshooting

Electric Motor Drive Installation and Troubleshooting

This newly revised edition presents the latest information on electric motors and motor drives in industry. It provides an overview of electric motor and drive theory, applications, installation, and troubleshooting.

Author: Glen Mazur

Publisher: Ingram

ISBN: 0826912524

Category: Education

Page: 501

View: 305

This newly revised edition presents the latest information on electric motors and motor drives in industry. It provides an overview of electric motor and drive theory, applications, installation, and troubleshooting. Specific topics covered include safety, drive programming, motor drive selection for specific applications, testing and start-up procedures. A wide spectrum of manufacturers and practical applications are represented in the text. Review questions and activities at the end of the each chapter provide a variety of assessment opportunities.
Categories: Education

Power Electronics and Motor Drives

Power Electronics and Motor Drives

This volume of the handbook: Focuses on special high-power semiconductor devices Describes various electrical machines and motors, their principles of operation, and their limitations Covers power conversion and the high-efficiency devices ...

Author: Bogdan M. Wilamowski

Publisher: CRC Press

ISBN: 9781439802861

Category: Technology & Engineering

Page: 1015

View: 327

The Industrial Electronics Handbook, Second Edition combines traditional and newer, more specialized knowledge that will help industrial electronics engineers develop practical solutions for the design and implementation of high-power applications. Embracing the broad technological scope of the field, this collection explores fundamental areas, including analog and digital circuits, electronics, electromagnetic machines, signal processing, and industrial control and communications systems. It also facilitates the use of intelligent systems—such as neural networks, fuzzy systems, and evolutionary methods—in terms of a hierarchical structure that makes factory control and supervision more efficient by addressing the needs of all production components. Enhancing its value, this fully updated collection presents research and global trends as published in the IEEE Transactions on Industrial Electronics Journal, one of the largest and most respected publications in the field. Power Electronics and Motor Drives facilitates a necessary shift from low-power electronics to the high-power varieties used to control electromechanical systems and other industrial applications. This volume of the handbook: Focuses on special high-power semiconductor devices Describes various electrical machines and motors, their principles of operation, and their limitations Covers power conversion and the high-efficiency devices that perform the necessary switchover between AC and DC Explores very specialized electronic circuits for the efficient control of electric motors Details other applications of power electronics, aside from electric motors—including lighting, renewable energy conversion, and automotive electronics Addresses power electronics used in very-high-power electrical systems to transmit energy Other volumes in the set: Fundamentals of Industrial Electronics Control and Mechatronics Industrial Communication Systems Intelligent Systems
Categories: Technology & Engineering

Electric Motors and Drives 5th Edition

Electric Motors and Drives  5th Edition

Helps users acquire knowledge and understanding of the capabilities and limitations of motors and drives without struggling through unnecessary math and theory Presents updated material on the latest and most widely-used motors and drives, ...

Author: Austin Hughes

Publisher:

ISBN: OCLC:1118980749

Category:

Page: 511

View: 126

Electric Motors and Drives: Fundamentals, Types and Applications, Fifth Edition is intended primarily for non-specialist users or students of electric motors and drives, but many researchers and specialist industrialists have also acknowledged its value in providing a clear understanding of the fundamentals. It bridges the gap between specialist textbooks (too analytical for the average user) and handbooks (full of detail but with little insight) providing an understanding of how each motor and drive system works. The fifth edition has been completely revised, updated and expanded. All of the most important types of motor and drive are covered, including d.c., induction, synchronous (including synchronous reluctance and salient Permanent Magnet), switched reluctance, and stepping. There has been significant innovation in this area since the fourth edition, particularly in the automotive, aircraft and industrial sectors, with novel motor topologies emerging, including hybrid designs that combine permanent magnet and reluctance effects. We now include a physical basis for understanding and quantifying torque production in these machines, and this leads to simple pictures that illuminate the control conditions required to optimise torque. The key converter topologies have been brought together, and the treatment of inverter switching strategies expanded. A new chapter is devoted to the treatment of Field Oriented control, reflecting its increasing importance for all a.c. motor drives. A unique physically-based approach is adopted which builds naturally on the understanding of motor behaviour developed earlier in the book: the largely non-mathematical treatment dispels much of the mystique surrounding what is often regarded as a difficult topic. Helps users acquire knowledge and understanding of the capabilities and limitations of motors and drives without struggling through unnecessary math and theory Presents updated material on the latest and most widely-used motors and drives, including brushless servo motors Includes additional diagrams and worked examples throughout this updated edition Includes a physical basis for the understanding and quantifying torque production.
Categories:

Energy Efficiency in Electric Motors Drives Power Converters and Related Systems

Energy Efficiency in Electric Motors  Drives  Power Converters and Related Systems

Today, there is a great deal of attention focused on sustainable growth worldwide. The increase in efficiency in the use of energy may even, in this historical moment, bring greater benefit than the use of renewable energies.

Author: Mario Marchesoni

Publisher: MDPI

ISBN: 9783039363902

Category: Technology & Engineering

Page: 248

View: 577

Today, there is a great deal of attention focused on sustainable growth worldwide. The increase in efficiency in the use of energy may even, in this historical moment, bring greater benefit than the use of renewable energies. Electricity appears to be the most sustainable of energies and the most promising hope for a planet capable of growing without compromising its own health and that of its inhabitants. Power electronics and electrical drives are the key technologies that will allow energy savings through the reduction of energy losses in many applications. This Special Issue has collected several scientific contributions related to energy efficiency in electrical equipment. Some articles are dedicated to the use and optimization of permanent magnet motors, which allow obtaining the highest level of efficiency. Most of the contributions describe the energy improvements that can be achieved with power electronics and the use of suitable control techniques. Last but not least, some articles describe interesting solutions for hybrid vehicles, which were created mainly to save energy in the smartest way possible.
Categories: Technology & Engineering

Practical Electric Motor Handbook

Practical Electric Motor Handbook

Of the many good books on motors, such as Electric Motors and Drives by Hughes, none offer the engineering professional a tailored guide to motors taking into account their expertise. This book fills that gap.

Author: Irving Gottlieb

Publisher: Elsevier

ISBN: 0080514391

Category: Technology & Engineering

Page: 220

View: 651

Experienced product designers are increasingly expected to be adept at incorporating a range of components into their designs. Students and experimenters too need to look beyond basic circuits and devices to achieve adequate design solutions. For those experienced in engineering design, this is the guide to electric motors. This book will allow engineers and designers to marry the technologies they know about with motor technology, and hence to incorporate motors into their products. Of the many good books on motors, such as Electric Motors and Drives by Hughes, none offer the engineering professional a tailored guide to motors taking into account their expertise. This book fills that gap. Irving Gottlieb is a leading author of many books for practising engineers, technicians and students of electronic and electrical engineering. Practical approach with minimum theory Covers a core area ignored by many electronics texts Shows how to incorporate motors into electronic products
Categories: Technology & Engineering

Electric Motors and Drives

Electric Motors and Drives

Author: Canadian Electricity Forum Inc

Publisher:

ISBN: 0978029569

Category: Electric driving

Page: 136

View: 212

Categories: Electric driving

Advanced Electric Drives

Advanced Electric Drives

Advanced Electric Drives is an invaluable resource to facilitate an understanding of the analysis, control, and modelling of electric machines.

Author: Ned Mohan

Publisher: John Wiley & Sons

ISBN: 9781118911136

Category: Technology & Engineering

Page: 208

View: 871

With nearly two-thirds of global electricity consumed by electric motors, it should come as no surprise that their proper control represents appreciable energy savings. The efficient use of electric drives also has far-reaching applications in such areas as factory automation (robotics), clean transportation (hybrid-electric vehicles), and renewable (wind and solar) energy resource management. Advanced Electric Drives utilizes a physics-based approach to explain the fundamental concepts of modern electric drive control and its operation under dynamic conditions. Author Ned Mohan, a decades-long leader in Electrical Energy Systems (EES) education and research, reveals how the investment of proper controls, advanced MATLAB and Simulink simulations, and careful forethought in the design of energy systems translates to significant savings in energy and dollars. Offering students a fresh alternative to standard mathematical treatments of dq-axis transformation of a-b-c phase quantities, Mohan’s unique physics-based approach “visualizes” a set of representative dq windings along an orthogonal set of axes and then relates their currents and voltages to the a-b-c phase quantities. Advanced Electric Drives is an invaluable resource to facilitate an understanding of the analysis, control, and modelling of electric machines. • Gives readers a “physical” picture of electric machines and drives without resorting to mathematical transformations for easy visualization • Confirms the physics-based analysis of electric drives mathematically • Provides readers with an analysis of electric machines in a way that can be easily interfaced to common power electronic converters and controlled using any control scheme • Makes the MATLAB/Simulink files used in examples available to anyone in an accompanying website • Reinforces fundamentals with a variety of discussion questions, concept quizzes, and homework problems
Categories: Technology & Engineering