transformers

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Transformers

Author : Simon Furman
ISBN : 0756630134
Genre : Juvenile Nonfiction
File Size : 80. 58 MB
Format : PDF
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A guide to the motion picture looks at the characters, their personalities, roles, and what they can change into.

Transformers

Author : Bhel
ISBN : 0070483159
Genre : Electric motor industry
File Size : 27. 28 MB
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This book is the collective effort of eminent experts from Bharat Heavy Electricals Limited (BHEL), a leading transformer manufacturer in India. An editorial committee perused the complete material, to integrate it into a homogenous book and to ensure complete continuity between the chapters. A list of authors and members of the editorial committee is included in the book.

Transformers Induction Machines

Author : M.V.Bakshi U.A.Bakshi
ISBN : 8184313802
Genre :
File Size : 48. 28 MB
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Basic Concepts : Concept of coupled circuits, Dot convention, Writing network equilibrium equations in coupled circuits (problems on coupled circuits excluded), Principle of transformer action for voltage transformation, Constructional details of shell type and core type single-phase and three-phase transformers, Description of the following types of transformers - power transformer, distribution transformer, Constant voltage transformer, Constant current transformer, Variable frequency transformers, Auto-transformers.Single-phase Transformers : Concept of ideal transformer, Equation for E.M.F. induced in the two windings, Voltage transformation ratio, Ideal transformer on no-load and loaded condition with corresponding phasor diagrams, Concept of M.M.F. balance in the magnetic circuit of an ideal transformer, Current transformation ratio, Concept of referring impedance connected on one side of ideal transformer to the other side, Practical transformer-how it deviates from the ideal transformer, Development of exact equivalent circuit of a practical transformer-visualization of a practical transformer as an ideal transformer combined with imperfections of electric and magnetic circuits, Approximate equivalent circuit of a practical transformer.Phasor diagram of a practical transformer for both no-load and loaded conditions, Losses, Power and all-day efficiency, Regulation, Testing of transformers - O.C. test, S.C. test and predetermination of efficiency and regulation, Sumpner s test, Parallel operation - need, conditions to be satisfied for parallel operation, Load sharing.Three-phase Transformers : All types of three-phase transformer connections including open delta, Choice of connection, Bank of single-phase transformers for three-phase operation, Phase conversion using transformers, Scott connection for three-phase to two-phase conversion, Labelling of three-phase transformer terminals, Phase shift between primary and secondary and vector groups, Conditions for proper operation of three-phase transformers in parallel. Three-winding Transformers : Advantages and disadvantages of three-winding transformers, Equivalent circuit. Basic Concepts of Induction Machines : Concept of rotating magnetic field, Operating principle, Construction, Classification and types - single-phase, three-phase, squirrel-cage, slip-ring, double-cage types.Three-phase Induction Motor : Phasor diagram of induction motor on no-load and loaded conditions, Visualization of a three-phase induction motor as a generalized transformer with a rotating secondary and obtaining its equivalent circuit, Different kinds of power losses in an induction motor, Efficiency, Performance evaluation-output power, Torque, Efficiency, Current and power factor. Torque-slip characteristics covering motoring, Generating and braking regions of operation, Induction generator, No-load and blocked rotor tests, Circle diagram and therefrom performance evaluation of the motor, Cogging and crawling, Equivalent circuit and performance of double-cage and deep-bar motors. Starting and Control of Three-phase Induction Motor : Need for starter, DOL, Y-Delta and auto-transformer starting, Rotor resistance starting, Electronic starters, Speed control - voltage, frequency and rotor resistance variations.Single-phase Induction Motor : Double revolving field theory and principle of operation, Types of single-phase induction motors: split-phase, Capacitor start, Shaded pole motors.

Transformers

Author : Erin Brereton
ISBN : 1572439831
Genre : Juvenile Nonfiction
File Size : 23. 30 MB
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After evil Decepticon robots take millions of people hostage in an attempt to conquer the Earth, the virtuous Autobot robots come to the rescue.

Transformers

Author : Alex Irvine
ISBN : 9780345519863
Genre : Fiction
File Size : 53. 2 MB
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The epic battles between Optimus Prime and Megatron have long thrilled Transformers fans. But these two giants weren’t always great leaders and bitter foes. This new novel continues the electrifying saga that started withTransformers: Exodus,unveiling the origins of the conflict—the explosive events that unfolded before Optimus and Megatron arrived Earthside, forever altering the destiny of their kind. Once allies, Optimus and Megatron are now enemies in a civil war. To prevent Cybertron from falling into Megatron’s hands, Optimus jettisons the planet’s heart, the AllSpark, into space, then sets out to find it with Megatron hot on his heels. Optimus is determined to defeat Megatron, bring the AllSpark home, and restore Cybertron to its former glory. But a saboteur lurks aboard Optimus’s spaceship, and ahead lie lost colonies, some of them hostile. Optimus needs help of the highest caliber, but from whom? Heroes such as Solus, Nexus, and Vector Prime are just names from make-believe stories of long ago. Or are they? Maybe it’s time for Optimus Prime to find out. Maybe it’s the only chance he has to vanquish mighty Megatron.

Schick Hydrobot The Transformers One Shot

Author : John Barber
ISBN :
Genre :
File Size : 61. 14 MB
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Schick’s Hydrobot makes his debut in a one-of-a-kind comic book, featuring a new Transformers storyline, which unveils Hydrobot’s origin alongside fan-favorite characters Optimus Prime, Bumblebee, Hound, and Megatron!

Transformers Ultimate Storybook Collection

Author : Hasbro
ISBN : 0316188654
Genre : Juvenile Fiction
File Size : 67. 34 MB
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Did you love Transformers movies? Then get ready for this bind-up of illustrated, movie-based storybooks of the first three films! This collection is sure to thrill every young fan--Autobot or Decepticon!

Transformers

Author : Chris Mowry
ISBN : 159961720X
Genre : Juvenile Fiction
File Size : 47. 10 MB
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Before the battle that led to the destruction of Allspark, the Autobots must face Wreckage, a reanimated Decepticon brought to madness by experiments performed on him by the government agency Sector Seven.

Transformers

Author : Xose M. López-Fernández
ISBN : 9781351832397
Genre : Technology & Engineering
File Size : 80. 40 MB
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Recent catastrophic blackouts have exposed major vulnerabilities in the existing generation, transmission, and distribution systems of transformers widely used for energy transfer, measurement, protection, and signal coupling. As a result, the reliability of the entire power system is now uncertain, and many blame severe underinvestment, aging technology, and a conservative approach to innovation. Composed of contributions from noted industry experts around the world, Transformers: Analysis, Design, and Measurement offers invaluable information to help designers and users overcome these and other challenges associated with the design, construction, application, and analysis of transformers. This book is divided into three sections to address contemporary economic, design, diagnostic, and maintenance aspects associated with power, instrument, and high-frequency transformers. Topics covered include: Design considerations Capability to withstand short circuits Insulation problems Stray losses, screening, and local excessive heating hazard Shell type and superconducting transformers Links between design and maintenance Component-related diagnostics and reliability Economics of life-cycle cost, design review, and risk-management methods Parameter measurement and prediction This book is an essential tool for understanding and implementing solutions that will ensure improvements in the development, maintenance, and life-cycle management of optimized transformers. This will lead to enhanced safety and reliability and lower costs for the electrical supply. Illustrating the need for close cooperation between users and manufacturers of transformers, this book outlines ways to achieve many crucial power objectives. Among these, the authors focus on the growing demand for transformer miniaturization, increased transmitted power density, and use of advanced materials to meet the requirements of power materials running under higher operational frequencies. Suggesting ways to redirect resources and exploit new technologies—such as computational modeling software—this book presents relatively inexpensive, simple, ready-to-implement strategies to advance transformers, improve power system integrity, reduce environmental impact, and much more.

Transformers Robots In Disguise Vol 8

Author : John Barber
ISBN : 9781623029289
Genre : Comics & Graphic Novels
File Size : 80. 24 MB
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The COMBINER WARS are over, and OPTIMUS PRIME faces the aftermath. Meanwhile, ARCEE confronts GALVATRON; SOUNDWAVE and COSMOS come face to face; TRACKS and NEEDLENOSE meet up again; and JETFIRE and KUP lead a team to investigate the mysterious ONYX system. Collects issues #42-45.

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