Analysis Of Synchronous Machines

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Analysis Of Synchronous Machines Second Edition

Author : T.A. Lipo
ISBN : 9781439880685
Genre : Technology & Engineering
File Size : 85.12 MB
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Analysis of Synchronous Machines, Second Edition is a thoroughly modern treatment of an old subject. Courses generally teach about synchronous machines by introducing the steady-state per phase equivalent circuit without a clear, thorough presentation of the source of this circuit representation, which is a crucial aspect. Taking a different approach, this book provides a deeper understanding of complex electromechanical drives. Focusing on the terminal rather than on the internal characteristics of machines, the book begins with the general concept of winding functions, describing the placement of any practical winding in the slots of the machine. This representation enables readers to clearly understand the calculation of all relevant self- and mutual inductances of the machine. It also helps them to more easily conceptualize the machine in a rotating system of coordinates, at which point they can clearly understand the origin of this important representation of the machine. Provides numerical examples Addresses Park’s equations starting from winding functions Describes operation of a synchronous machine as an LCI motor drive Presents synchronous machine transient simulation, as well as voltage regulation Applying his experience from more than 30 years of teaching the subject at the University of Wisconsin, author T.A. Lipo presents the solution of the circuit both in classical form using phasor representation and also by introducing an approach that applies MathCAD®, which greatly simplifies and expands the average student’s problem-solving capability. The remainder of the text describes how to deal with various types of transients—such as constant speed transients—as well as unbalanced operation and faults and small signal modeling for transient stability and dynamic stability. Finally, the author addresses large signal modeling using MATLAB®/Simulink®, for complete solution of the non-linear equations of the salient pole synchronous machine. A valuable tool for learning, this updated edition offers thoroughly revised content, adding new detail and better-quality figures.
Category: Technology & Engineering

Analysis Of Synchronous Machine Turn To Turn Fault Currents

Author : Matchyaraju Alla
ISBN : 0355045346
Genre : Electric fault location
File Size : 57.56 MB
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In the event of internal faults in turbo generators large currents flow in the windings due to the unsymmetrical magnetic linkage between the stator windings of the lap-connected generators. This causes severe damage to the windings, shaft and coupling of the machine. Extensive study on these faults can help mitigate the damage caused by these faults by allowing design of protective schemes that detect faults more quickly. This thesis, backed by experimental results, proposes a method that depends on the negative sequence voltage, negative sequence current quantities and field currents to distinguish from internal or external faults as well as focusing on the analysis of internal faults in synchronous machines. The limitations of the existing protection practices in detecting the turn-to-turn faults were also researched. The main motivation for the work is to overcome the present limitations by using a new approach for modelling of generators for internal faults. Information on the magnitude of internal fault current can help validate the synchronous machine internal faults models based on a modified winding function theory approach and the multi-loop method. The work deals with development of a test setup for measuring the turn-to-turn fault currents of the salient pole synchronous generator in the lab. The process is initiated by calculating the approximated currents using the design aspects of the machine. These calculations are compared to the measured currents during various combinations of turn-to-turn faults. This thesis discusses the sensitivity of protection schemes applied for detecting turn-to-turn in the generator. The zero sequence voltage based approach, negative sequence differential protection and the proposed advanced rotor double frequency harmonic current based detection methods were each analyzed to determine their sensitivity for internal faults by varying from the number of shorted turns from 1 turn to 10 turns.
Category: Electric fault location

Permanent Magnet Synchronous Machines

Author : Sandra Eriksson
ISBN : 9783039213504
Genre : Technology & Engineering
File Size : 30.57 MB
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Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the increased use of renewable energy and the electrification of transports. This book contains the successful submissions of fifteen papers to a Special Issue of Energies on the subject area of “Permanent Magnet Synchronous Machines”. The focus is on permanent magnet synchronous machines and the electrical systems they are connected to. The presented work represents a wide range of areas. Studies of control systems, both for permanent magnet synchronous machines and for brushless DC motors, are presented and experimentally verified. Design studies of generators for wind power, wave power and hydro power are presented. Finite element method simulations and analytical design methods are used. The presented studies represent several of the different research fields on permanent magnet machines and electric drives.
Category: Technology & Engineering

Ac Machine Systems

Author : Jingde Gao
ISBN : 3642011535
Genre : Technology & Engineering
File Size : 83.22 MB
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"AC Machine Systems" stresses both analysis methods and operating performances of AC machine systems, including variable speed drive system of AC machines with power electronics and control devices, power energy system composed of AC machines and power lines, special machine system with special machines and special loads, electric machine system consisting of AC machines and excitation devices. Based on a single coil, the Multi-Loop Theory is thoroughly described, and examples of how to use the new approach are presented. This book provides a new way for analyzing the AC machine systems. This book is designed for the researchers and postgraduates in the field of electric machines and control. It's also a reference book for related technicians. This book is written in memory of Professor Jingde Gao, past-president of Tsinghua University, Member of Chinese Academy of Sciences. Another two authors, Linzheng Zhang and Xiangheng Wang both are Professors in Electrical Engineering Dept. of Tsinghua University.
Category: Technology & Engineering

Analysis Of Electric Machinery And Drive Systems

Author : Paul Krause
ISBN : 9781118524329
Genre : Technology & Engineering
File Size : 37.22 MB
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Introducing a new edition of the popular reference on machine analysis Now in a fully revised and expanded edition, this widely used reference on machine analysis boasts many changes designed to address the varied needs of engineers in the electric machinery, electric drives, and electric power industries. The authors draw on their own extensive research efforts, bringing all topics up to date and outlining a variety of new approaches they have developed over the past decade. Focusing on reference frame theory that has been at the core of this work since the first edition, this volume goes a step further, introducing new material relevant to machine design along with numerous techniques for making the derivation of equations more direct and easy to use. Coverage includes: Completely new chapters on winding functions and machine design that add a significant dimension not found in any other text A new formulation of machine equations for improving analysis and modeling of machines coupled to power electronic circuits Simplified techniques throughout, from the derivation of torque equations and synchronous machine analysis to the analysis of unbalanced operation A unique generalized approach to machine parameters identification A first-rate resource for engineers wishing to master cutting-edge techniques for machine analysis, Analysis of Electric Machinery and Drive Systems is also a highly useful guide for students in the field.
Category: Technology & Engineering

Matrix Analysis Of Electrical Machines

Author : A. K. Mukhopadhyay
ISBN : 8122414451
Genre : Electric apparatus and appliances
File Size : 90.23 MB
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Electrical Machines May Be Analysed Utilising One Of The Three Methods Viz. Classical Theory, Unified Theory And The Generalised Theory Of Electrical Machines. Generalised Theory May Also Be Regarded As The Matrix Theory Of Electrical Machines Which Requires Only A Knowledge Of The Circuit Equation, Elementary Matrix Algebra And The Principle That The Power Of The System Must Remain Invariant Irrespective Of The Terms In Which It Is Expressed.This Technique Is The Best Approach To Obtain Electrical Machine Performance For Both The Non-Specialist And The Specialist And That The Latter Will Find In It, A Powerful Tool When He Is Faced With More Complicated Performance Problems. An Attempt Has Been Made In This Volume To Study Most Of The Electrical Machines Normally Covered In Undergraduate And Postgraduate Courses Utilising Matrix Analysis. The Book Also Includes Some More Advanced Problems To Indicate The Power And Limitation Of The Method.After An Introduction To The Theory, The Same Methodology Has Been Applied To Static Circuits As Illustrations. Then The Generalised Machines Of First And Second Kinds Have Been Introduced And Analysed Followed By The Different Case Studies. Both Steady State And Transient Analysis Of Conventional Machines Have Been Presented In Both Static And Rotating Reference Frames. The Beauty Of The Matrix Theory Has Been Projected While Developing The Equivalent Circuits Of Different Machines Using Revolving Field Theory Where Physical Concepts Have Been Derived From The Mathematical Models Developed Through Matrix Analysis.The Latest Development Of The Theory Viz. The Development Of State Model Of Different Electrical Machines Has Been Explained Clearly In The Text. These Models May Readily Be Utilised For Stability Analysis Using Computers.The Book Has Been Presented In Such A Way That, It Will Be A Textbook For Undergraduate And Postgraduate Students And Also A Reference Book For The Research Students In The Relevant Area And Practising Engineers.The Treatment Of The Book May Find Wide Application For The Practising Engineers Who Face Day-To-Day Problems In The Practical Field Since The Theory Is Based On Elementary Knowledge Of Matrix Algebra And Circuit Theory Rather Than Complicated Physical Laws And Hypothesis.
Category: Electric apparatus and appliances

Modern Power Systems Analysis

Author : Xi-Fan Wang
ISBN : 9780387728537
Genre : Technology & Engineering
File Size : 20.12 MB
Format : PDF
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The capability of effectively analyzing complex systems is fundamental to the operation, management and planning of power systems. This book offers broad coverage of essential power system concepts and features a complete and in-depth account of all the latest developments, including Power Flow Analysis in Market Environment; Power Flow Calculation of AC/DC Interconnected Systems and Power Flow Control and Calculation for Systems Having FACTS Devices and recent results in system stability.
Category: Technology & Engineering

Analysis Of Electrical Machines

Author : Richard T. Smith
ISBN : 9781483190013
Genre : Technology & Engineering
File Size : 32.40 MB
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Analysis of Electrical Machines discloses the information essential for a holistic understanding of electrical machines. The title emphasizes the effective analysis of machine performance. The text first covers the basic transformer and magnetically coupled circuit theory concepts, and then proceeds to tackling commutator machines. Next, the selection deals with synchronous and induction machines. The text also talks about the transient analysis of noncommutator machines. The last chapter details the physical basis for machine inductance parameters. The book will be of great use to both student and practicing electronics engineers and technicians.
Category: Technology & Engineering

Digital Design And Verilog Hdl Fundamentals

Author : Joseph Cavanagh
ISBN : 9781420074161
Genre : Computers
File Size : 89.1 MB
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Comprehensive and self contained, this tutorial covers the design of a plethora of combinational and sequential logic circuits using conventional logic design and Verilog HDL. Number systems and number representations are presented along with various binary codes. Several advanced topics are covered, including functional decomposition and iterative networks. A variety of examples are provided for combinational and sequential logic, computer arithmetic, and advanced topics such as Hamming code error correction. Constructs supported by Verilog are described in detail. All designs are continued to completion. Each chapter includes numerous design issues of varying complexity to be resolved by the reader.
Category: Computers

Electrical Machine Analysis Using Finite Elements

Author : Nicola Bianchi
ISBN : 9781420057874
Genre : Technology & Engineering
File Size : 45.62 MB
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From the fan motor in your PC to precision control of aircraft, electrical machines of all sizes, varieties, and levels of complexity permeate our world. Some are very simple, while others require exacting and application-specific design. Electrical Machine Analysis Using Finite Elements provides the tools necessary for the analysis and design of any type of electrical machine by integrating mathematical/numerical techniques with analytical and design methodologies. Building successively from simple to complex analyses, this book leads you step-by-step through the procedures and illustrates their implementation with examples of both traditional and innovative machines. Although the examples are of specific devices, they demonstrate how the procedures apply to any type of electrical machine, introducing a preliminary theory followed by various considerations for the unique circumstance. The author presents the mathematical background underlying the analysis, but emphasizes application of the techniques, common strategies, and obtained results. He also supplies codes for simple algorithms and reveals analytical methodologies that universally apply to any software program. With step-by-step coverage of the fundamentals and common procedures, Electrical Machine Analysis Using Finite Elements offers a superior analytical framework that allows you to adapt to any electrical machine, to any software platform, and to any specific requirements that you may encounter.
Category: Technology & Engineering