Download or read book Steady State and Transient Analysis of a Short Primary Linear Induction Motor Using A D Q Axis Pole by pole Model written by Thomas Arthur Nondahl and published by . This book was released on 1977 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis Of Thyristor Power Conditioned Motors written by S.K. Pillai and published by Universities Press. This book was released on with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents, systematically, the basic methods of analysis of analysis of both DC and AC motors fed from elementary configurations of commonly used power converters. The methods of determining both steady state and transient performance have been discussed.
Download or read book Transient Stability Analysis of Synchronous Motors written by Jiérâi éCemus and published by Academia. This book was released on 1990 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synchronous motor, despite its apparently inherent drawbacks, has become one of the most commonly used driving units for supplying power. In particular, the rapid progress in high-power semiconductor technology has opened up attractive possibilities for designing fast and multivariable controllers for handling abnormal operational conditions. A systematic study of the questions related to the nonstationary performance of synchronous motors accompanied by a change in kinetic energy of their inertial masses is presented in this volume. Special attention is paid to the transient stability of synchronous motors subjected to various abnormal operating conditions. The generalized investigations fully exploit the optimization offered by computer methods, enabling the authors to avoid the basic drawbacks of the purely analytical methods and to draw up some generalized diagrams of the ultimate transient stability limits. Theoretical results are compared with a number of practical examples. Of the transient faults, the problems of resynchronisation are the most closely examined, e.g.
Download or read book Design Analysis and Optimization of Line start Permanent magnet Synchronous Motors Simultaneous Electromagnetic and Thermal Analysis written by Mousalreza Faramarzi Palangar and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Future energy concerns and global economic challenges are encouraging the world to undertake energy conservation projects. A significant way to address these concerns is to increase the energy efficiency of electric appliances. Since electric machines account for roughly 45% of all industrial electricity usage, an immense amount of energy saving can be accomplished by increasing the efficiency of electric motors. Induction motors are used in industry because of advantages like self-starting capability, affordable manufacturing cost and maintenance. However, intrinsic drawbacks of induction motors like comparatively low efficiency and power factor are not easy to overcome, even though induction motor performance has improved dramatically over the years. -- Manufacturers of electric motors worldwide are gradually focusing on alternative electric machine technology to meet more rigorous energy efficiency requirements. Hence, line-start permanent magnet synchronous motor (LSPMSM) machinery has gained substantial recognition in comparison with other motor types. This type of motor has been made very appealing by significant benefits like self-starting, high efficiency and power factor. Extensive literature research on LSPMSMs has been undertaken, concentrating primarily on the development of rotor configurations, developing the steady-state analytical model, and using the transient time-step finite element (FE) approach for synchronization evaluation. Due to a hybrid LSPMSM rotor including both an induction cage and a permanent magnet, torque mechanisms in transient starting and steady-state operating conditions vary. Finite-element analysis (FEA) is commonly used to determine the LSPMSM's synchronization capability. However, this form of verification strategy is costly in terms of calculation. Hence, motor designers and engineers are interested in using a fast and reliable alternative design and optimization approach like analytical methods. Hence, it would be of great significance to develop a design and optimization methodology that allows motor designers to study transient and steady-state performance with high accuracy and low computation time. -- This study presents a strategy to design an optimum line-start permanent magnet synchronous motor (LSPMSM) with improved performance in both transient (dynamic operation to reach synchronous speed) and steady-state (operating with constant synchronous speed). A mathematical design and optimization method, based on the developed machine sizing equations of induction motors (IMs) and permanent magnet (PM) motors, is proposed for the design of an optimum LSPMSM. The rotors of the IM and IPM are combined to create a hybrid rotor including an induction cage and permanent magnet for a LSPMSM. To verify the proposed mathematical method, a three-phase, 4-pole 4-kW LSPMSM is selected as a case study. A second case study of a three-phase, 1-kW, 8-pole LSPMSM is studied for further verification. The initial designs of the IM, IPM motor and LSPMSM are analyzed using FEM to verify the proposed analytical design and analysis method. The IM and IPM are then analytically optimised using a genetic algorithm (GA) for the transient improvement (through maximizing the starting torque) and the steady-state performance improvement (via maximizing efficiency), respectively. The rotor cage bar dimensions and PM size are selected as optimisation variables in optimizing the IM and the IPM. Combining the rotors of the optimised IM and IPM yields the optimum hybrid rotor for the LSPMSM. To present a comparative study between the proposed optimisation method and FEM optimisation, the 2D design of an initial LSPMSM design is optimised based on FEM in Ansys/Maxwell. The designed LSPMSM meets the super-premium efficiency (IE4) standards, which outperforms the benchmark IM standard of premium efficiency (IE3). Also, the designed LSPMSM has the capability of starting directly whilst the benchmark PM motor requires an external driver to start. -- In addition, this study presents a novel analytical thermal analysis model based on a lumped-parameter model of the LSPMSMs. Hence, a lumped-parameter thermal circuit is proposed for LSPMSMs based on the developed thermal model of an IM. To verify the proposed analytical thermal model, a 3-phase, 4-pole 3-kW IM is selected as a case study incorporated with thermal experimental test results from a 3-kW commercial IM to validate the results of the proposed thermal model. The performance of the proposed thermal model of the LSPMSM is verified using 3D FEM-based thermal analysis. In this section of the thesis (thermal analysis and modeling), the LSPMSMs are researched to discover the achievable maximum output power in the same frame size (3-kW and 4-kW commercial induction motors) with successful synchronization and safe operation in terms of temperature rise. -- In summary, the imperative of this study proposes a novel analytical electromagnetic and thermal design, analysis and optimization platform of line-start permanent magnet synchronous motors (LSPMSMs). The main contributions made in this thesis are: (a) simultaneous starting torque and efficiency improvements of the LSPMSM designed based on the commercial IM via implementing optimization using FEM techniques; (b) comparing the performance of two different optimization approaches (gradient-free and gradient-based approaches) in the context of electric machines with a focus on the IMs and LSPMSMs; (c) developing an analytical design, analysis and optimization platform for the LSPMSMs using machine sizing techniques of IMs and permanent magnet (PM) motors; (d) proposing an analytical thermal model and analysis of the LSPMSMs based on lumped-parameter network.
Download or read book Small signal stability control and dynamic performance of power systems written by M.J Gibbard and published by University of Adelaide Press. This book was released on 2015-07-15 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough and exhaustive presentation of theoretical analysis and practical techniques for the small-signal analysis and control of large modern electric power systems as well as an assessment of their stability and damping performance.
Download or read book Electrical Power Systems written by Mohamed E. El-Hawary and published by John Wiley & Sons. This book was released on 1995-03-09 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive textbook introduces electrical engineers to themost relevant concepts and techniques in electric power systemsengineering today. With an emphasis on practical motivations forchoosing the best design and analysis approaches, the authorcarefully integrates theory and application. Key features include more than 500 illustrations and diagrams,clearly developed procedures and application examples, importantmathematical details, coverage of both alternating and directcurrent, an additional set of solved problems at the end of eachchapter, and an historical overview of the development of electricpower systems. This book will be useful to both power engineeringstudents and professional power engineers.
Download or read book Engineering and Design written by Us Army Corps Of Engineers and published by Military Bookshop. This book was released on 2002-06-01 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual provides practical guidance for the design and operation of soil vapor extraction (SVE) and bioventing (BV) systems. It is intended for use by engineers, geologists, hydrogeologists, and soil scientists, chemists, project managers, and others who possess a technical education and some design experience but only the broadest familiarity with SVE or BV systems.
Download or read book 2010 ADA Standards for Accessible Design written by Department Justice and published by Createspace Independent Publishing Platform. This book was released on 2014-10-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: (a) Design and construction. (1) Each facility or part of a facility constructed by, on behalf of, or for the use of a public entity shall be designed and constructed in such manner that the facility or part of the facility is readily accessible to and usable by individuals with disabilities, if the construction was commenced after January 26, 1992. (2) Exception for structural impracticability. (i) Full compliance with the requirements of this section is not required where a public entity can demonstrate that it is structurally impracticable to meet the requirements. Full compliance will be considered structurally impracticable only in those rare circumstances when the unique characteristics of terrain prevent the incorporation of accessibility features. (ii) If full compliance with this section would be structurally impracticable, compliance with this section is required to the extent that it is not structurally impracticable. In that case, any portion of the facility that can be made accessible shall be made accessible to the extent that it is not structurally impracticable. (iii) If providing accessibility in conformance with this section to individuals with certain disabilities (e.g., those who use wheelchairs) would be structurally impracticable, accessibility shall nonetheless be ensured to persons with other types of disabilities, (e.g., those who use crutches or who have sight, hearing, or mental impairments) in accordance with this section.
Download or read book Fox and McDonald s Introduction to Fluid Mechanics written by Robert W. Fox and published by John Wiley & Sons. This book was released on 2020-06-30 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through ten editions, Fox and McDonald's Introduction to Fluid Mechanics has helped students understand the physical concepts, basic principles, and analysis methods of fluid mechanics. This market-leading textbook provides a balanced, systematic approach to mastering critical concepts with the proven Fox-McDonald solution methodology. In-depth yet accessible chapters present governing equations, clearly state assumptions, and relate mathematical results to corresponding physical behavior. Emphasis is placed on the use of control volumes to support a practical, theoretically-inclusive problem-solving approach to the subject. Each comprehensive chapter includes numerous, easy-to-follow examples that illustrate good solution technique and explain challenging points. A broad range of carefully selected topics describe how to apply the governing equations to various problems, and explain physical concepts to enable students to model real-world fluid flow situations. Topics include flow measurement, dimensional analysis and similitude, flow in pipes, ducts, and open channels, fluid machinery, and more. To enhance student learning, the book incorporates numerous pedagogical features including chapter summaries and learning objectives, end-of-chapter problems, useful equations, and design and open-ended problems that encourage students to apply fluid mechanics principles to the design of devices and systems.
Download or read book Teaching at Its Best written by Linda B. Nilson and published by John Wiley & Sons. This book was released on 2010-04-20 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Teaching at Its Best This third edition of the best-selling handbook offers faculty at all levels an essential toolbox of hundreds of practical teaching techniques, formats, classroom activities, and exercises, all of which can be implemented immediately. This thoroughly revised edition includes the newest portrait of the Millennial student; current research from cognitive psychology; a focus on outcomes maps; the latest legal options on copyright issues; and how to best use new technology including wikis, blogs, podcasts, vodcasts, and clickers. Entirely new chapters include subjects such as matching teaching methods with learning outcomes, inquiry-guided learning, and using visuals to teach, and new sections address Felder and Silverman's Index of Learning Styles, SCALE-UP classrooms, multiple true-false test items, and much more. Praise for the Third Edition of Teaching at Its BestEveryone veterans as well as novices will profit from reading Teaching at Its Best, for it provides both theory and practical suggestions for handling all of the problems one encounters in teaching classes varying in size, ability, and motivation." Wilbert McKeachie, Department of Psychology, University of Michigan, and coauthor, McKeachie's Teaching TipsThis new edition of Dr. Nilson's book, with its completely updated material and several new topics, is an even more powerful collection of ideas and tools than the last. What a great resource, especially for beginning teachers but also for us veterans!" L. Dee Fink, author, Creating Significant Learning ExperiencesThis third edition of Teaching at Its Best is successful at weaving the latest research on teaching and learning into what was already a thorough exploration of each topic. New information on how we learn, how students develop, and innovations in instructional strategies complement the solid foundation established in the first two editions." Marilla D. Svinicki, Department of Psychology, The University of Texas, Austin, and coauthor, McKeachie's Teaching Tips
Download or read book Applications of Topic Models written by Jordan Boyd-Graber and published by Now Publishers. This book was released on 2017-07-13 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes recent academic and industrial applications of topic models with the goal of launching a young researcher capable of building their own applications of topic models.
Download or read book Electric Power Annual written by and published by . This book was released on 1990 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides industry data on electric power, including generating capability, generation, fuel consumption, cost of fuels, and retail sales and revenue.
Download or read book Department of Defense Dictionary of Military and Associated Terms written by United States. Joint Chiefs of Staff and published by . This book was released on 1979 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oral Health in America written by and published by . This book was released on 2000 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Wind Power written by Rupp Carriveau and published by BoD – Books on Demand. This book was released on 2012-11-21 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's wind energy industry is at a crossroads. Global economic instability has threatened or eliminated many financial incentives that have been important to the development of specific markets. Now more than ever, this essential element of the world energy mosaic will require innovative research and strategic collaborations to bolster the industry as it moves forward. This text details topics fundamental to the efficient operation of modern commercial farms and highlights advanced research that will enable next-generation wind energy technologies. The book is organized into three sections, Inflow and Wake Influences on Turbine Performance, Turbine Structural Response, and Power Conversion, Control and Integration. In addition to fundamental concepts, the reader will be exposed to comprehensive treatments of topics like wake dynamics, analysis of complex turbine blades, and power electronics in small-scale wind turbine systems.
Download or read book Advanced Electrical Technology written by Harry Cotton and published by . This book was released on 1967 with total page 1326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diagnostic Radiology Physics written by International Atomic Energy Agency and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is aimed at students and teachers involved in programmes that train medical physicists for work in diagnostic radiology. It provides a comprehensive overview of the basic medical physics knowledge required in the form of a syllabus for the practice of modern diagnostic radiology. This makes it particularly useful for graduate students and residents in medical physics programmes. The material presented in the publication has been endorsed by the major international organizations and is the foundation for academic and clinical courses in both diagnostic radiology physics and in emerging areas such as imaging in radiotherapy.
