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Electrical Machines Drives

Author: P. Hammond
Publisher: Elsevier
ISBN: 148329336X
Size: 29.42 MB
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Containing approximately 200 problems (100 worked), the text covers a wide range of topics concerning electrical machines, placing particular emphasis upon electrical-machine drive applications. The theory is concisely reviewed and focuses on features common to all machine types. The problems are arranged in order of increasing levels of complexity and discussions of the solutions are included where appropriate to illustrate the engineering implications. This second edition includes an important new chapter on mathematical and computer simulation of machine systems and revised discussions of unbalanced operation, permanent-magnet machines and universal motors. New worked examples and tutorial problems have also been added.

Electrical Machines And Drives

Author: Jan A. Melkebeek
Publisher: Springer
ISBN: 3319727303
Size: 12.47 MB
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This book aims to offer a thorough study and reference textbook on electrical machines and drives. The basic idea is to start from the pure electromagnetic principles to derive the equivalent circuits and steady-state equations of the most common electrical machines (in the first parts). Although the book mainly concentrates on rotating field machines, the first two chapters are devoted to transformers and DC commutator machines. The chapter on transformers is included as an introduction to induction and synchronous machines, their electromagnetics and equivalent circuits. Chapters three and four offer an in-depth study of induction and synchronous machines, respectively. Starting from their electromagnetics, steady-state equations and equivalent circuits are derived, from which their basic properties can be deduced. The second part discusses the main power-electronic supplies for electrical drives, for example rectifiers, choppers, cycloconverters and inverters. Much attention is paid to PWM techniques for inverters and the resulting harmonic content in the output waveform. In the third part, electrical drives are discussed, combining the traditional (rotating field and DC commutator) electrical machines treated in the first part and the power electronics of part two. Field orientation of induction and synchronous machines are discussed in detail, as well as direct torque control. In addition, also switched reluctance machines and stepping motors are discussed in the last chapters. Finally, part 4 is devoted to the dynamics of traditional electrical machines. Also for the dynamics of induction and synchronous machine drives, the electromagnetics are used as the starting point to derive the dynamic models. Throughout part 4, much attention is paid to the derivation of analytical models. But, of course, the basic dynamic properties and probable causes of instability of induction and synchronous machine drives are discussed in detail as well, with the derived models for stability in the small as starting point. In addition to the study of the stability in the small, a chapter is devoted to large-scale dynamics as well (e.g. sudden short-circuit of synchronous machines). The textbook is used as the course text for the Bachelor’s and Master’s programme in electrical and mechanical engineering at the Faculty of Engineering and Architecture of Ghent University. Parts 1 and 2 are taught in the basic course ’Fundamentals of Electric Drives’ in the third bachelor. Part 3 is used for the course ’Controlled Electrical Drives’ in the first master, while Part 4 is used in the specialised master on electrical energy.

Electrical Machines And Drives

Author: J. D. Edwards
Publisher: Macmillan International Higher Education
ISBN: 1349213136
Size: 32.95 MB
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This book gives a thoroughly up-to-date account of the principles of electrical machines and drives in a form accessible to the non-specialist. At the same time, it provides sound groundwork for more advanced studies. It wil be of particular value as an introductory textbook for students of electrical and electronic engineering. It features a novel approach to the treatment of classical AC machines based on the concepts of current density and flux density, together with a thorough treatment of the new non-classical electronically commutated machines. Worked examples and problems for solution are included.

Electric Machines And Drives

Author: Shaahin Filizadeh
Publisher: CRC Press
ISBN: 1439858071
Size: 22.16 MB
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Electric machines have a ubiquitous presence in our modern daily lives, from the generators that supply electricity to motors of all sizes that power countless applications. Providing a balanced treatment of the subject, Electric Machines and Drives: Principles, Control, Modeling, and Simulation takes a ground-up approach that emphasizes fundamental principles. The author carefully deploys physical insight, mathematical rigor, and computer simulation to clearly and effectively present electric machines and drive systems. Detailing the fundamental principles that govern electric machines and drives systems, this book: Describes the laws of induction and interaction and demonstrates their fundamental roles with numerous examples Explores dc machines and their principles of operation Discusses a simple dynamic model used to develop speed and torque control strategies Presents modeling, steady state based drives, and high-performance drives for induction machines, highlighting the underlying physics of the machine Includes coverage of modeling and high performance control of permanent magnet synchronous machines Highlights the elements of power electronics used in electric drive systems Examines simulation-based optimal design and numerical simulation of dynamical systems Suitable for a one semester class at the senior undergraduate or a graduate level, the text supplies simulation cases that can be used as a base and can be supplemented through simulation assignments and small projects. It includes end-of-chapter problems designed to pick up on the points presented in chapters and develop them further or introduce additional aspects. The book provides an understanding of the fundamental laws of physics upon which electric machines operate, allowing students to master the mathematical skills that their modeling and analysis requires.

Electrical Machines And Drives

Author: Peter Vas
Publisher: Oxford University Press on Demand
ISBN:
Size: 52.55 MB
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The operation and simulation of a.c. and d.c. machines and a large number of variable-speed drives (including some of the most recently introduced modern drives) are discussed here, and a general theory applicable during their steady-state and transient operation is presented. Although the detailed mathematical analysis given relies mainly on space-vector theory, the relationship to other theories, including the matrix theory of generalized machine theory, is also emphasized. Many of the equations are given in their state-variable or analytical forms so that they can be used directly for computer simulations or for hand calculations. Novel features of this book include descriptions of the "exact" and "simplified" performance analysis of a.c. machines and a large number of variable-speed drives; both large- and small-signal equations; magnetic saturation effects are incorporated into the different models of smooth-air-gap and salient-pole machines; and extension of the space-vector model to the double-cage induction machine and the salient-pole synchronous machine. It is also demonstrated how all the various machine models used in the matrix model of electrical machines can be obtained without having to use matrix transformations, while a systematic approach is given for the a priori deduction of all the transformations used in general machine theory. Electrical Machines and Drives can be used without any prior knowledge of space-vector or other theories; it is aimed at students, teachers, and those researchers in industry and universities who require a deep understanding of the various aspects of the operation and the theories of electrical machines and drives, and their simulation.

Regelung Elektrischer Antriebe

Author: Werner Leonhard
Publisher: Springer-Verlag
ISBN: 3642573282
Size: 31.15 MB
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Leistungselektronisch gespeiste und mikroelektronisch geregelte elektrische Antriebe sind dynamisch hochwertige und universell einsetzbare elektromechanische Energiewandler, die heute in vielfältigen Ausführungsformen in weiten Bereichen von Drehmoment, Drehzahl und Leistung zur Verfügung stehen. Von besonderer Bedeutung sind kommutatorlose Drehstrom-Regelantriebe, die erst mit vektoriellen Verfahren und einer digital verwirklichten Regelungstechnik möglich wurden. Das Buch enthält eine zusammenfassende theoretische Darstellung elektrischer Regelantriebe einschließlich der leistungselektronischen Umrichter, von klassischen Gleichstromantrieben bis zu digital geregelten Drehstromantrieben. Die beschriebenen Verfahren werden durch experimentelle Ergebnisse belegt; Anwendungen sind anhand von Beispielen diskutiert.