Static Electromagnetic Frequency Changers PDF Download

Author: L. L. Rozhanskii
Publisher: Elsevier
ISBN: 1483194744
Category : Technology & Engineering
Languages : en
Pages : 123

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Book Description
Static Electromagnetic Frequency Changers is about the theory, design, construction, and applications of static electromagnetic frequency changers, devices that used for multiplication or division of alternating current frequency. It is originally published in the Russian language. This book is organized into five chapters. The first three chapters introduce the readers to the principles of operation, the construction, and the potential applications of static electromagnetic frequency changers and to the principles of their design. The two concluding chapters use some hitherto unpublished work of the author and provide examples of the design of frequency doublers and triplers. This book will be of interest to engineers and scientific workers, engaged in the field of automatic control electrical machines and in other fields of technology connected with the use of alternating current above normal supply frequencies.

Author: Jaroslaw Luszcz
Publisher: John Wiley & Sons
ISBN: 1119388953
Category : Technology & Engineering
Languages : en
Pages : 284

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Book Description
Provides a concise and thorough reference for designing electrical and electronic systems that employ adjustable speed drives Electrical and electronic systems that employ adjustable speed drives are being increasingly used in present-day automation applications. They are considered by many application engineers as one of the most interfering components, especially in a contemporarily faced industrial environment. This book fills the gap between the high-level academic knowledge in the electromagnetic compatibility (EMC) field and the recommended practical rules for assuring electromagnetic compatibility margin. It focuses on finding and formulating the issues that often occur with the generation and propagation of conducted emission in AC motor drives fed by frequency converters, rather than proposing specific solutions for dealing with them. It also features explanations of selected academic backgrounds of EMC and presents practical case studies. The book starts with an introduction to conducted emission in adjustable speed drives. It then goes on to offer in-depth chapters covering conducted emission origins in switch-mode power converters; conducted emission generation by frequency converter in adjustable speed drives (ASD); propagation of motor side originated conducted emission towards the power grid; modeling of conducted emission in ASD; broadband behavior of ASD components; and impact of a motor feeding cable on CM currents generated in ASD. In addition, this resource: Presents state-of-the-art analysis of undesirable high frequency phenomena accompanying AC motor speed control Discusses the fundamentals of phenomena of electromagnetic interference (EMI) generation in switch mode static converters Provides methodology of modeling-conducted EMI generation and propagation in ASD High Frequency Conducted Emission in AC Motor Drives Fed By Frequency Converters: Sources and Propagation Paths will appeal to scholars and a wide range of professionals who are involved in the stages of development, design, and application of adjustable speed drives in accordance with ever-increasing EMC requirements.

Author: T. M. Vorob'Yeva
Publisher: Elsevier
ISBN: 1483153290
Category : Technology & Engineering
Languages : en
Pages : 243

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Book Description
Electromagnetic Clutches and Couplings contains a detailed description of U.S.S.R. electromagnetic friction clutches, magnetic couplings, and magnetic particle couplings. This book is divided into four chapters. The first chapter discusses the design and construction of magnetic (solenoid-operated) couplings, which are very quick-acting devices and used in low power high-speed servo-systems. Chapter 2 describes the possible fields of application, design, construction, and utilization of magnetic particle couplings. The aspects of construction, design, and utilization of induction clutches (slip clutches), which provide the solution to the problems of speed control with ventilator loads, are covered in Chapters 3 and 4. The last chapters also include a brief discussion on the construction, design, and application of hysteresis and capacitor couplings. This publication provides a valuable background to the design or selection of many electromagnetic clutches and couplings, which is beneficial to readers intending to find the appropriate type of device for particular purposes and performance.

Author: L. Thourel
Publisher: Elsevier
ISBN: 1483164551
Category : Technology & Engineering
Languages : en
Pages : 115

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Book Description
The Use of Ferrites at Microwave Frequencies describes the applications of ferrites at microwave frequencies and the apparatus involved. Topics covered range from the properties of ferrites to gyromagnetic and non-reciprocal effects, ferrite isolators, circulators, and modulators. The use of ferrites in variable frequency filter cavities is also discussed. Mathematical explanations are reduced to the strict minimum and only the results of calculations are indicated. This book consists of seven chapters and opens with a review of the theory of magnetism, touching on subjects such as the BOHR magneton, diamagnetism and paramagnetism, ferromagnetism and antiferromagnetism, ferrimagnetism, and demagnetizing. The next chapter deals with the elementary theory of gyromagnetic effects and covers the kinetic moment theorem, precession of the spin moment, gyromagnetic resonance, complex permeability, and gyromagnetic effects in the atom. The reader is then introduced to ferrites and their properties; non-reciprocal effects and their applications; and ferrite isolators, circulators, and modulators. The final chapter describes the use of ferrites in the design of cavities whose resonant frequency is controlled by a magnetic field or filters with variable characteristics. This monograph is written primarily for microwave and electronics engineers.

Author: Yuping Wang
Publisher: Springer Nature
ISBN: 9819945380
Category : Medical
Languages : en
Pages : 388

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Book Description
This book mainly focuses on diversity of brain diseases, such as sleep disorders, major depression disorder, anxiety disorders, epilepsy, cognitive disorders, etc. It introduces the current pathological mechanisms of various diseases from the perspective of basic theories and research; it introduces the clinical evaluation and treatment of the above diseases from the clinical perspective. In addition, the current frontier research on therapeutics of neural stimulation for the above brain disorder was introduced, such as Transcranial electrical stimulation, magnetic stimulation, ultrasonic stimulation, etc., and the therapeutic strategy and stimuli parameters for reference were proposed. This book is aimed at clinical students, doctors and researchers in the field of neurology. Based on major brain diseases, this book systematically proposed the maneuverability, safety and effectiveness of neural stimulation technologies in the treatment of major brain diseases.

Author: J. B. Birks
Publisher: Elsevier
ISBN: 1483156060
Category : Technology & Engineering
Languages : en
Pages : 685

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Book Description
The Theory and Practice of Scintillation Counting is a comprehensive account of the theory and practice of scintillation counting. This text covers the study of the scintillation process, which is concerned with the interactions of radiation and matter; the design of the scintillation counter; and the wide range of applications of scintillation counters in pure and applied science. The book is easy to read despite the complex nature of the subject it attempts to discuss. It is organized such that the first five chapters illustrate the fundamental concepts of scintillation counting. Chapters 6 to 10 detail the properties and applications of organic scintillators, while the next four chapters discuss inorganic scintillators. The last two chapters provide a review of some outstanding problems and a postscript. Nuclear physicists, radiation technologists, and postgraduate students of nuclear physics will find the book a good reference material.

Author: G. Zelinger
Publisher: Elsevier
ISBN: 1483224090
Category : Technology & Engineering
Languages : en
Pages : 245

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Book Description
Electronics and Instrumentation, Volume 36: Basic Matrix Analysis and Synthesis presents the application of matrix methods to practical electronics problems. This book focuses on transistor applications. Organized into three parts, this volume begins with an overview of the fundamental theory of twoports and explains the mechanisms of matrix and determinant operations with applications to the study of twoport networks, both active and passive. This text then explains the concept of impedance transformation and image matching in the different matrix domains. This book presents as well the analysis and synthesis of active networks. The final part deals with the mathematical model concepts of transistors and vacuum tubes that are freely applied to a wide range of problems with an emphasis on practical applications such as conventional amplifiers, single-, and multi-stage transistor feedback amplifiers and oscillators. This book is a valuable resource for electronics engineers as well as for students with some grounding in mathematics and network theory.

Author: K. K. Keropyan
Publisher: Elsevier
ISBN: 1483149285
Category : Technology & Engineering
Languages : en
Pages : 151

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Book Description
Electrical Analogues of Pin-Jointed Systems is a compilation of papers from members of the Rostov-on-Don Civil Engineering Institute and of the Taganrog Radiotechnical Institute, dealing with the statics and dynamics of buildings. This collection addresses the problems encountered in building mechanics. This book also discusses the principles of electrical analogues used in calculating solutions to problems involving static and dynamic structural formations. The different methods of electrical analogues are explained such as solving problems related to the resistance of materials. This text then shows the calculations using the equation of three bi-moments for solid beams with different rigidities, as well as other circuits used to calculate stresses in all parts of a static framework. In particular, the text notes that a circuit is capable of calculating the size of the current flowing in other parts of the system the stress found in the main framework. This book further notes the electrical analogues using four terminal networks and for determining the effects of temperature on structural beams and frameworks. For practical considerations, the text points out the analogue built by the Taganrog Radiotechnical Institute . Of interest is an electrical circuit that mimics a beam being shifted out of line during stress encountered from unwanted motion. When the foundation causes shifting of the pillars of a structure, the text explains how the degree of deflection can be calculated by using a formula relevant to electrical analogue use. This collection of articles will prove useful to structural engineers, researchers in structural mechanics, and scientists involved in dynamics and physics.

Author: N. D. Anisimova
Publisher: Elsevier
ISBN: 1483226719
Category : Technology & Engineering
Languages : en
Pages : 429

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Book Description
Transient Phenomena in Electrical Power Systems: Problems and Illustrations deals with the technique of calculating the different transient phenomena in electrical power systems. Concrete examples are given to show the character of the transient processes, and the order of magnitude is derived in some typical cases. Topics covered include equivalent circuits, steady-state quantities, and the initial conditions of a transient process. The characteristics of generators and synchronous condensers are also considered. Comprised of nine chapters, this book begins with an introduction to the units of measurement as well as the equations of the system and its elements, such as frequency regulators, turbine governors, and transformers. The second chapter presents examples of the construction of equivalent circuits and the determination of the steady-state operation of a system, along with the original condition that precedes the transient process. The third and fourth chapters deal with different characteristics of generators, synchronous condensers, and loads of electrical systems. The fifth chapter examines the general criteria of stability used in calculations of the conditions in electrical systems. Problems of static stability and the effect of large oscillations on stability are discussed in the next three chapters. The final chapter is devoted to special problems on the variation of operating conditions, frequency variation, and the flow of power between systems. This monograph is written for design engineers, operation engineers, apprentices, and students.

Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1042

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Book Description