Download or read book Design Analysis and Application of Magnetless Doubly Salient Machines written by Christopher H. T. Lee and published by Springer. This book was released on 2018-01-22 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the key characteristics of magnetless doubly salient machines, evaluates their design philosophies, and proposes new topologies for various applications. It discusses the background of and previous research on magnetless machines, while also outlining upcoming trends and potential future developments. The thesis begins by presenting various torque-improving structures – namely the multi-tooth structure, the double-rotor (DR) structure, the axial-field (AF) structure, and the flux-reversal (FR) structure – for magnetless machines. It subsequently addresses the idea of merging the design philosophies of two different machines to form new dual-mode machines. Thanks to a reconfigured winding arrangement and controllable DC-field excitation, the proposed machines can further extend their operating range to meet the extreme demands of applications in electric vehicles and wind power generation. Lastly, the thesis employs the finite element method (FEM) to thoroughly analyze the proposed machines’ key performance parameters and develops experimental setups to verify the proposed concepts.
Download or read book Design Analysis and Application of Magnetless Doubly Salient Machines written by 李浩天 and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Analysis and Application of Brushless Doubly Salient Machines written by Ying Fan (Ph.D.) and published by . This book was released on 2006 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Analysis and Application of Brushless Doubly Salient Machines written by Ying Fan and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design, Analysis and Application of Brushless Doubly Salient Machines" by Ying, Fan, 樊英, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled "Design, Analysis and Application of Brushless Doubly Salient Machines" submitted by FAN Ying for the degree of Doctor of Philosophy at The University of Hong Kong in April 2006 In response to increasing concern about the environment, research into the development of electric vehicles (EVs) has accelerated in recent years. To enable electric vehicles to compete successfully with gasoline vehicles, the goals of motor drive for electric vehicles are to pursue optimal efficiency over wide operating ranges, high controllability, wide speed range, high reliability and maintenance-free operation. In order to pursue these goals, a new class of motor drives is proposed which consists of two types of stator windings, namely the poly-phase armature winding and dc field winding. This thesis presents the design, analysis and control of this brushless doubly- fed doubly-salient (BDFDS) motor drive. As a result of the search for alternative forms of energy, there has also been much interest in the development of wind power generation. The core element of wind power generation is the electric generator. This thesis first presents a new three-phase 12/8- pole DSPM machine for wind power generation, including its design, analysis and implementation. The corresponding analysis of topological selection is specially elaborated. A three-phase 12/8-pole BDFDS machine is then developed for wind power generation, which uniquely offers constant output voltage and efficiency optimization over a wide range of wind speeds. The finite element method (FEM) has been used for electromagnetic field analysis of the proposed BDFDS machines, in which magnetic saturation, armature field and dc exciting field have been considered. Hence, the static characteristics, being the basis of analysis, design and control of the BDFDS machine, have been deduced. The sizing equation of the BDFDS machine has been deduced and design details have been presented to provide a practical way of making initial calculation of machine dimensions and parameters. A dynamic model of the BDFDS machine has also been derived. Numerical simulation been carried out by using Matlab/Simulink revealed that the proposed three-phase BDFDS machine has the advantage of wide constant power operation range. The control strategies of two BDFDS machines, with skewed and unskewed rotors, have been developed and implemented by a dSPACE-based controller. Sinusoidal current control is used for the BDFDS machine with skewed rotor, whereas square current control is applied to the one with unskewed rotor. Moreover, a half-bridge power converter, which is composed of three IGBT-based power modules, has been employed to provide bi-directional current operation. It has the advantages of reducing the number of power switches and providing independent phase current control. In order to minimize the torque ripple of the four-phase 8/6-pole DSPM motor, a new two-phase operation mode is proposed and analyzed, in which sinusoidal current control is proposed. Theoretical analysis, computer simulation, and experimental results have verified that the operating torque ripple at the rated load can be reduced by about 14% when using the proposed two-phase operation mode. The results of the numerous experiments conducted not only verify the validity of the theoretical analysis but also illustrate the good performance of the newly proposed BDFDS machines for electric
Download or read book Electric Vehicle Machines and Drives written by K. T. Chau and published by John Wiley & Sons. This book was released on 2015-08-24 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely comprehensive reference consolidates the research and development of electric vehicle machines and drives for electric and hybrid propulsions • Focuses on electric vehicle machines and drives • Covers the major technologies in the area including fundamental concepts and applications • Emphasis the design criteria, performance analyses and application examples or potentials of various motor drives and machine systems • Accompanying website includes the simulation models and outcomes as supplementary material
Download or read book Switched Reluctance Motor written by Ahmed Tahour and published by BoD – Books on Demand. This book was released on 2017-06-21 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last years, the switched reluctance machines (SRMs) have been the subject of significant developments. SRMs are gaining much interest because of their simplicity in structures, high-output power, high starting torque, wide speed range, rugged and robust construction, reliability, and low manufacturing costs, which make these machines viable for many applications. SRMs include machines of different structures whose common property is the significant variation in the shape of the air gap during rotation. The use of advanced control technologies makes possible the integration of the mechanical and electrical conversion systems in their optimal mode of operation. Different strategies of control can be applied to SRMs, depending on their mode of functioning and the purpose of their applications. The goal of this book is to present recent works on concept, control, and applications in switched reluctance machines.
Download or read book Electric Vehicle Machines and Drives written by K. T. Chau and published by John Wiley & Sons. This book was released on 2015-05-13 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely comprehensive reference consolidates the research and development of electric vehicle machines and drives for electric and hybrid propulsions • Focuses on electric vehicle machines and drives • Covers the major technologies in the area including fundamental concepts and applications • Emphasis the design criteria, performance analyses and application examples or potentials of various motor drives and machine systems • Accompanying website includes the simulation models and outcomes as supplementary material
Download or read book Design of Rotating Electrical Machines written by Juha Pyrhonen and published by John Wiley & Sons. This book was released on 2009-02-11 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: In one complete volume, this essential reference presents an in-depth overview of the theoretical principles and techniques of electrical machine design. This book enables you to design rotating electrical machines with its detailed step-by-step approach to machine design and thorough treatment of all existing and emerging technologies in this field. Senior electrical engineering students and postgraduates, as well as machine designers, will find this book invaluable. In depth, it presents the following: Machine type definitions; different synchronous, asynchronous, DC, and doubly salient reluctance machines. An analysis of types of construction; external pole, internal pole, and radial flux machines. The properties of rotating electrical machines, including the insulation and heat removal options. Responding to the need for an up-to-date reference on electrical machine design, this book includes exercises with methods for tackling, and solutions to, real design problems. A supplementary website hosts two machine design examples created with MATHCAD: rotor surface magnet permanent magnet machine and squirrel cage induction machine calculations. Classroom tested material and numerous graphs are features that further make this book an excellent manual and reference to the topic.
Download or read book Increasing Penetration of Renewable Sources in Power Systems Opportunities and Challenges written by Xue Lyu and published by Frontiers Media SA. This book was released on 2023-04-27 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Analysis Control and Application of Double stator Permanent magnet Brushless Machines written by 喻錦程 and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Synchronous Machines Second Edition written by T.A. Lipo and published by CRC Press. This book was released on 2012-06-25 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Direct Torque Control Strategies of Electrical Machines written by Fatma Ben Salem and published by BoD – Books on Demand. This book was released on 2021-01-20 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the design and analysis of Direct Torque Control (DTC). It introduces readers to two major applications of electrical machines: speed drive and position control and gives the readers a comprehensive overview of the field of DTC dedicated to AC machines. It includes new DTC approaches with and without control of commutation frequency. It also covers DTC applications using artificial intelligence. The book combines theoretical analysis, simulation, and experimental concepts.To make the content as accessible as possible, the book employs a clear proposal in each chapter, moving from the background, to numerical development, and finally to case studies and illustrations. The book is a wide-ranging reference source for graduate students, researchers, and professors from related fields and it will benefit practicing engineers and experts from the industry.
Download or read book Mechanical Design of Electric Motors written by Wei Tong and published by CRC Press. This book was released on 2014-04-28 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid increases in energy consumption and emphasis on environmental protection have posed challenges for the motor industry, as has the design and manufacture of highly efficient, reliable, cost-effective, energy-saving, quiet, precisely controlled, and long-lasting electric motors.Suitable for motor designers, engineers, and manufacturers, as well
Download or read book Reluctance Electric Machines written by Ion Boldea and published by CRC Press. This book was released on 2018-07-20 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric energy is arguably a key agent for our material prosperity. With the notable exception of photovoltaic generators, electric generators are exclusively used to produce electric energy from mechanical energy. More than 60% of all electric energy is used in electric motors for useful mechanical work in various industries. This book presents the modeling, performance, design, and control of reluctance synchronous and flux-modulation machines developed for higher efficiency and lower cost. It covers one- and three-phase reluctance synchronous motors in line-start applications and various reluctance flux-modulation motors in pulse width modulation converter-fed variable speed drives. FEATURES Presents basic and up-to-date knowledge about the topologies, modeling, performance, design, and control of reluctance synchronous machines. Includes information on recently introduced reluctance flux-modulation electric machines (switched- flux, flux-reversal, Vernier, transverse flux, claw pole, magnetic-geared dual-rotor, brushless doubly fed, etc.). Features numerous examples and case studies throughout. Provides a comprehensive overview of all reluctance electric machines.
Download or read book Mechanical Design and Manufacturing of Electric Motors written by Wei Tong and published by CRC Press. This book was released on 2022-05-20 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Second Edition of Mechanical Design and Manufacturing of Electric Motors provides in-depth knowledge of design methods and developments of electric motors in the context of rapid increases in energy consumption, and emphasis on environmental protection, alongside new technology in 3D printing, robots, nanotechnology, and digital techniques, and the challenges these pose to the motor industry. From motor classification and design of motor components to model setup and material and bearing selections, this comprehensive text covers the fundamentals of practical design and design-related issues, modeling and simulation, engineering analysis, manufacturing processes, testing procedures, and performance characteristics of electric motors today. This Second Edition adds three brand new chapters on motor breaks, motor sensors, and power transmission and gearing systems. Using a practical approach, with a focus on innovative design and applications, the book contains a thorough discussion of major components and subsystems, such as rotors, shafts, stators, and frames, alongside various cooling techniques, including natural and forced air, direct- and indirect-liquid, phase change, and other newly-emerged innovative cooling methods. It also analyzes the calculation of motor power losses, motor vibration, and acoustic noise issues, and presents engineering analysis methods and case-study results. While suitable for motor engineers, designers, manufacturers, and end users, the book will also be of interest to maintenance personnel, undergraduate and graduate students, and academic researchers.
Download or read book Design Analysis and Application of Low Speed Permanent Magnet Linear Machines written by Wenlong Li and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design, Analysis and Application of Low-speed Permanent Magnet Linear Machines" by Wenlong, Li, 李文龙, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: With the growing interests and high requirements in low-speed linear drives, the linear machines possessing high force density, high power density and high efficiency feature become in great demands for the linear direct-drive applications. There are many available linear machine topologies, but their performances for exhibiting the high-force density capability dissatisfy the industrial requirements. In order to solve this problem, the new machine topologies emphasizing on high force density are explored and studied. The objective of this thesis is to present the design, analysis, and application of permanent magnet (PM) linear machines which can offer a higher force density at the same magnetic loading and electric loading than the conventional machines. Although in recent years there are many emerging advanced PM rotational machines for direct-drive rotational drives, the development of advanced PM linear machines for direct-drive linear drives is sparse. In spite of the motion type of electric machines, the inherent operating principle is the same. By studying and borrowing concepts of the high torque density rotational electric machines, the linear machine morphologies of the promising candidates are designed and analyzed. The problems and side effects resulting from the linearization are discussed and suppressed. Two main approaches for machine design and analysis are developed and applied, namely the analytical calculation and the finite element method (FEM). By analytically solving the magnetic field problem, the relationships between the field quantities and the machine geometry are unveiled. With the use of analytical calculation, the machine design and dimension optimization are conveniently achieved. With the use of FEM, the machine design objective and its electromagnetic performance are verified and evaluated. Finally, the proposed low-speed PM linear machine is applied for direct-drive wave power generation. By mathematically modeling the wave power, generation system and the generator, the conditions for maximum power harvesting are determined. By using the vector control, the generator output power is maximized which is verified by the simulation results. DOI: 10.5353/th_b4832972 Subjects: Permanent magnet motors Electromechanical devices
Download or read book Design Modeling and Control of Doubly Salient Reluctance Machines written by Siddharth Mehta and published by . This book was released on 2020 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
