Generation Of Ac Voltage
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Generation Of Ac Voltage
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Author :
language : en
Publisher:
Release Date : 1984
Generation Of Ac Voltage written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Electric currents, Alternating categories.
Alternating Current Generators
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Author : A. Bhatia
language : en
Publisher: CreateSpace
Release Date : 2015-02-18
Alternating Current Generators written by A. Bhatia and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-18 with categories.
An alternating current generator, or AC generator, produces an alternating current, which means the voltage produced alternately reverses from positive to negative polarity, producing a corresponding change in the direction of current flow. Much like a DC generator, an AC generator requires a coil to cut across the force lines of a magnetic field. This coil is attached to two slip rings, which deliver the current to and from the load destination, thus completing the circuit. Alternating current generators are often called "Alternators." The magnitude of AC voltage generated by an AC generator is dependent on (1) The strength of the magnetic field (number of lines of force) (2) The speed at which the loop rotates (3) The number of loops of wire that cut the magnetic field. A rotation speed of 3000 revolutions per minute(RPM) produces 50 Hz, and 3600 RPM produce 60 Hz. The electric current in North American homes has a frequency of 60 hertz while in Europe it is 50 Hz. An alternating current motor, or AC motor uses electrical energy to procude motion and torque. Very simple AC motors are called "Squirrel cage motors"; these have only one or more stationary coils within which a special kind of mechanical rotor is free to rotate. There is no electrical connection to the rotor from the outside. Most AC motors require a starter, or method of limiting the inrush current to a reasonable level. Types of motor starting include reactive (capacitor start and inductive start), and electronic (frequency drives and soft start drives).The reactive start method is usually used on fractional horsepower motors, and the electronic method is usually reserved for larger motors. This 4-hr Quick Book provides a basic understanding of AC motors and generators, explaining how to use them, how to calculate power, and determine torque considerations. The course is based entirely on Naval Education and Training Materials (NAVEDTRA 14177), Electricity and Electronic Training Series; Module-5 and covers Chapter 3 and 4 titled "Alternating Current Generators and Alternating Current Motors." Learning Objective At the conclusion of this course, the reader will be able to: Describe the principle of magnetic induction as it applies to AC generators. Describe the differences between the two basic types of AC generators. Explain the factors that determine the maximum power output of an AC generator. Describe the relationships between the individual output and resultant vectorial sum voltages in multiphase generators. List the factors that determine the frequency and voltage of the alternator output. Describe the purpose and procedure of parallel generator operation. List three basic types of AC motors and describe the characteristics of each type. Describe the characteristics of a series motor that enable it to be used as a universal motor. State the primary application of synchronous motors, and explain the characteristics that make them suitable for that application. Describe the features that make the AC induction motor the most widely used of electric motors. Explain the operation of split-phase windings in single-phase AC induction motors. Describe the effects of shaded poles in single-phase, AC induction motors.
Generation Of Alternating Current By A Power Diode
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Author : Arthur W. Goldstein
language : en
Publisher:
Release Date : 1965
Generation Of Alternating Current By A Power Diode written by Arthur W. Goldstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
A C Generators
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Author : Robert L. Ames
language : en
Publisher: Taylor & Francis Group
Release Date : 1990
A C Generators written by Robert L. Ames and has been published by Taylor & Francis Group this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Technology & Engineering categories.
Presents practical criteria for designing synchronous generators. Assuming a familiarity with electro-magnetic theory and manufacturing methods, this practical guide to designing commercial machines details how to obtain reliable calculations for the various quantities involved. Recognizing that effective design involves a certain degree of compromise between many conflicting requirements, the author shows how to determine which properties are of most importance and which may be sacrificed while still producing a satisfactory machine. The use of mathematical formulas is avoided, except in a few special cases, and ample sources and references are provided at the end of the book.
Alternating Currents Simply Explained
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Author : Alfred William Marshall
language : en
Publisher:
Release Date : 1908
Alternating Currents Simply Explained written by Alfred William Marshall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1908 with Electric currents, Alternating categories.
Direct Current Generators
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Author : A. Bhatia
language : en
Publisher: CreateSpace
Release Date : 2015-02-21
Direct Current Generators written by A. Bhatia and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-21 with Technology & Engineering categories.
A direct current generator, or DC generator, produces a voltage of constant polarity, which means the voltage and current do not change over time. DC generators are basically AC generators whose output voltage is switched the other way round at the proper moment, so that the direction of the voltage is always in a single direction. The AC generator uses slip rings to transfer the current to the electrical circuit, while the DC generator uses a split-ring commutator. Generators can be very small or quite huge. Commercial DC generators are commonly found in traction applications like subways and trains. Factories that do electrolysis, electroplating and those that produce aluminum, caustic soda, chlorine, and some other industrial materials need large amounts of direct current and use DC generators.An electric motor is very similar to a generator, except that power is provided to turn the rotors. They may, in fact, be described as generators "running backwards". When current is passed through the armature of a DC motor, a torque is generated by magnetic reaction, and the armature revolves. Adjustable speed is difficult to obtain with motors whose armatures are connected to fixed frequency power lines (AC motors). Here is where DC motors shine; their rotating field speed depends on the rotor speed itself. The speed of DC series motors varies with load, and torque varies inversely with speed. This makes them particularly suitable to starting high inertia loads such as railway trains. Starting a DC motor requires often an external resistor or rheostat to limit the current. The value, in Ohms, of that resistor is reduced in steps as the speed of the motor increases, until finally that resistor is removed from the circuit as the motor reaches close to its final speed.This 4-hr Quick Book provides discusses salient features of DC motors and generators in detail. The course is based entirely on Naval Education and Training Materials (NAVEDTRA 14177), Electricity and Electronic Training Series; Module-5 and covers Chapter 1 and 2 titled “Direct Current Generators and Direct Current Motors”. Learning ObjectiveAt the conclusion of this course, the reader will be able to:• State the principle by which generators convert mechanical energy to electrical energy.• State the rule to be applied when you determine the direction of induced emf in a coil.• State what component causes a generator to produce direct current rather than alternating current.• State how field strength can be varied in a dc generator.• State the three classifications of dc generators.• State the term that applies to voltage variation from no-load to full-load conditions and how it is expressed as a percentage.• State the factors that determine the direction of rotation in a dc motor.• State the right-hand rule for motors.• Describe the main differences and similarities between a dc generator and a dc motor.• List the advantages and disadvantages of the different types of dc motors.• Discuss the means of controlling the speed and direction of a dc motor.• Explain the need for a starting resistor in a dc motor.
Reactive Power Control In Ac Power Systems
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Author : Naser Mahdavi Tabatabaei
language : en
Publisher: Springer
Release Date : 2017-04-05
Reactive Power Control In Ac Power Systems written by Naser Mahdavi Tabatabaei and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-04-05 with Technology & Engineering categories.
This textbook explores reactive power control and voltage stability and explains how they relate to different forms of power generation and transmission. Bringing together international experts in this field, it includes chapters on electric power analysis, design and operational strategies. The book explains fundamental concepts before moving on to report on the latest theoretical findings in reactive power control, including case studies and advice on practical implementation students can use to design their own research projects. Featuring numerous worked-out examples, problems and solutions, as well as over 400 illustrations, Reactive Power Control in AC Power Systems offers an essential textbook for postgraduate students in electrical power engineering. It offers practical advice on implementing the methods discussed in the book using MATLAB and DIgSILENT, and the relevant program files are available at extras.springer.com.
Alternating Currents Of Electricity
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Author : Gisbert Kapp
language : en
Publisher:
Release Date : 1893
Alternating Currents Of Electricity written by Gisbert Kapp and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1893 with Electric currents, Alternating categories.
Alternating Currents Of Electricity
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Author : Gisbert Kapp
language : en
Publisher: Legare Street Press
Release Date : 2023-07-18
Alternating Currents Of Electricity written by Gisbert Kapp and has been published by Legare Street Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-07-18 with categories.
First published in 1894, this technical handbook provides a detailed overview of alternating current (AC) electricity. It covers the generation, measurement, and distribution of AC power, as well as its various applications in industry and society. This book will appeal to engineers, scientists, and historians of technology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
University Physics
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Author : Samuel J. Ling
language : en
Publisher:
Release Date : 2017-12-19
University Physics written by Samuel J. Ling and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Science categories.
University Physics is designed for the two- or three-semester calculus-based physics course. The text has been developed to meet the scope and sequence of most university physics courses and provides a foundation for a career in mathematics, science, or engineering. The book provides an important opportunity for students to learn the core concepts of physics and understand how those concepts apply to their lives and to the world around them. Due to the comprehensive nature of the material, we are offering the book in three volumes for flexibility and efficiency. Coverage and Scope Our University Physics textbook adheres to the scope and sequence of most two- and three-semester physics courses nationwide. We have worked to make physics interesting and accessible to students while maintaining the mathematical rigor inherent in the subject. With this objective in mind, the content of this textbook has been developed and arranged to provide a logical progression from fundamental to more advanced concepts, building upon what students have already learned and emphasizing connections between topics and between theory and applications. The goal of each section is to enable students not just to recognize concepts, but to work with them in ways that will be useful in later courses and future careers. The organization and pedagogical features were developed and vetted with feedback from science educators dedicated to the project. VOLUME II Unit 1: Thermodynamics Chapter 1: Temperature and Heat Chapter 2: The Kinetic Theory of Gases Chapter 3: The First Law of Thermodynamics Chapter 4: The Second Law of Thermodynamics Unit 2: Electricity and Magnetism Chapter 5: Electric Charges and Fields Chapter 6: Gauss's Law Chapter 7: Electric Potential Chapter 8: Capacitance Chapter 9: Current and Resistance Chapter 10: Direct-Current Circuits Chapter 11: Magnetic Forces and Fields Chapter 12: Sources of Magnetic Fields Chapter 13: Electromagnetic Induction Chapter 14: Inductance Chapter 15: Alternating-Current Circuits Chapter 16: Electromagnetic Waves