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Author: Yu. V. Borovskikh
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3112319206
Category : Mathematics
Languages : en
Pages : 200
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Book Description
No detailed description available for "Random Permanents".
Author: Yu. V. Borovskikh
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3112319206
Category : Mathematics
Languages : en
Pages : 200
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Book Description
No detailed description available for "Random Permanents".
Author: Thompson Elwyn Woodward
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 36
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Book Description
Author: Gaolin Wang
Publisher: Springer Nature
ISBN: 9811500509
Category : Technology & Engineering
Languages : en
Pages : 305
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Book Description
The book focuses on position sensorless control for PMSM drives, addressing both basic principles and experimental evaluation. It provides an in-depth study on a number of major topics, such as model-based sensorless control, saliency-based sensorless control, position estimation error ripple elimination and acoustic noise reduction. Offering a comprehensive and systematic overview of position sensorless control and practical issues it is particularly suitable for readers interested in the sensorless control techniques for PMSM drives. The book is also a valuable resource for researchers, engineers, and graduate students in fields of ac motor drives and sensorless control.
Author: N. Balakrishnan
Publisher: Springer
ISBN: 0817648070
Category : Mathematics
Languages : en
Pages : 652
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Book Description
This book offers a thorough and updated guide to the theory and methods of progressive censoring, an area that has experienced tremendous growth over the last decade. The theory has developed quite nicely in some special cases having practical applications to reliability and quality. The Art of Progressive Censoring is a valuable reference for graduate students, researchers, and practitioners in applied statistics, quality control, life testing, and reliability. With its accessible style and concrete examples, the work may also be used as a textbook in an advanced undergraduate or a beginning graduate course on censoring or progressive censoring, as well as a supplementary textbook for a course on ordered data.
Author: Ramu Krishnan
Publisher: CRC Press
ISBN: 1351837370
Category : Technology & Engineering
Languages : en
Pages : 560
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Book Description
Despite two decades of massive strides in research and development on control strategies and their subsequent implementation, most books on permanent magnet motor drives still focus primarily on motor design, providing only elementary coverage of control and converters. Addressing that gap with information that has largely been disseminated only in journals and at conferences, Permanent Magnet Synchronous and Brushless DC Motor Drives is a long-awaited comprehensive overview of power electronic converters for permanent magnet synchronous machines and control strategies for variable-speed operation. It introduces machines, power devices, inverters, and control, and addresses modeling, implementation, control strategies, and flux weakening operations, as well as parameter sensitivity, and rotor position sensorless control. Suitable for both industrial and academic audiences, this book also covers the simulation, low cost inverter topologies, and commutation torque ripple of PM brushless DC motor drives. Simulation of the motor drives system is illustrated with MATLAB® codes in the text. This book is divided into three parts—fundamentals of PM synchronous and brushless dc machines, power devices, inverters; PM synchronous motor drives, and brushless dc motor drives. With regard to the power electronics associated with these drive systems, the author: Explores use of the standard three-phase bridge inverter for driving the machine, power factor correction, and inverter control Introduces space vector modulation step by step and contrasts with PWM Details dead time effects in the inverter, and its compensation Discusses new power converter topologies being considered for low-cost drive systems in PM brushless DC motor drives This reference is dedicated exclusively to PM ac machines, with a timely emphasis on control and standard, and low-cost converter topologies. Widely used for teaching at the doctoral level and for industrial audiences both in the U.S. and abroad, it will be a welcome addition to any engineer’s library.
Author: Mahmoud Khalifeh
Publisher: Springer Nature
ISBN: 3030399702
Category : Technology & Engineering
Languages : en
Pages : 285
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Book Description
This open access book offers a timely guide to challenges and current practices to permanently plug and abandon hydrocarbon wells. With a focus on offshore North Sea, it analyzes the process of plug and abandonment of hydrocarbon wells through the establishment of permanent well barriers. It provides the reader with extensive knowledge on the type of barriers, their functioning and verification. It then discusses plug and abandonment methodologies, analyzing different types of permanent plugging materials. Last, it describes some tests for verifying the integrity and functionality of installed permanent barriers. The book offers a comprehensive reference guide to well plugging and abandonment (P&A) and well integrity testing. The book also presents new technologies that have been proposed to be used in plugging and abandoning of wells, which might be game-changing technologies, but they are still in laboratory or testing level. Given its scope, it addresses students and researchers in both academia and industry. It also provides information for engineers who work in petroleum industry and should be familiarized with P&A of hydrocarbon wells to reduce the time of P&A by considering it during well planning and construction.
Author: Jacek F. Gieras
Publisher: CRC Press
ISBN: 1000777006
Category : Technology & Engineering
Languages : en
Pages : 308
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Book Description
The late 1980s saw the beginning of the PM brushless machine era, with the invention of high-energy density permanent magnets (PM) and the development of power electronics. Although induction motors are now the most popular electric motors, the impact of PM brushless machines on electromechanical drives is significant. Today, PM machines come second to induction machines. Replacement of electromagnetic field excitation systems by PMs brings the following benefits: No electrical energy is absorbed by the field excitation system and thus there are no excitation losses, causing substantial increase in efficiency Higher power density (kW/kg) and/or torque density (Nm/kg) than electromagnetic excitation Better dynamic performance than motors with electromagnetic excitation (higher magnetic flux density in the air gap) Simplification of construction and maintenance Less expensive for some types of machines Modern Permanent Magnet Electric Machines: Theory and Control serves as a textbook for undergraduate power engineering students who want to supplement and expand their knowledge in the fundamentals of magnetism, soft magnetic materials, permanent magnets (PMs), calculation of magnetic circuits with PMs, modern PM brushed DC machines and their controls, modern PM brushless DC motors and drive control, and modern PM generators. The book can help students learn more about electrical machines and can serve as a prescribed text for teaching elective undergraduate courses such as modern permanent magnet electrical machines. Since the book is written in a simple scientific language and without redundant mathematics, it can also be used by practicing engineers and managers employed in electrical machinery or electromagnetic device industries.
Author: J.M.D Coey
Publisher: Routledge
ISBN: 1351425420
Category : Science
Languages : en
Pages : 417
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Book Description
One of the first books to approach magnetism from a metal physics perspective, Permanent Magnetism presents research ideas that are being translated into commercial reality for ferrite and Nd-Fe-B magnets, and follows the discovery of interstitial, intermetallic materials. Written by well-known authors, the book contains a comprehensive yet concise treatment of the fundamental theory underlying permanent magnetism and illustrates applications with modern, permanent magnetic materials, including ceramics and intermetallic compounds. Each chapter contains worked examples to reinforce applications and the appendices include detailed mathematics and tabular data on material properties.
Author: Zi Qiang Zhu
Publisher: John Wiley & Sons
ISBN: 1394194358
Category : Technology & Engineering
Languages : en
Pages : 501
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Book Description
A comprehensive resource providing basic principles and state-of-the art developments in sensorless control technologies for permanent magnet synchronous machine drives Sensorless Control of Permanent Magnet Synchronous Machine Drives highlights the global research achievements over the last three decades and the sensorless techniques developed by the authors and their colleagues, and covers sensorless control techniques of permanent magnet machines, discussing issues and solutions. Many worked application examples are included to aid in practical understanding of concepts. Written by two pioneering authors in the field, Sensorless Control of Permanent Magnet Synchronous Machine Drives covers sample topics such as: Permanent magnet brushless AC and DC drives Single three-phase, dual three-phase, and open winding machines Modern control theory based sensorless methods, covering model reference adaptive system, sliding mode observer, extended Kalman filter, and model predictive control Flux-linkage and back-EMF based methods for non-salient machines, and active flux-linkage and extended back-EMF methods for salient machines Pulsating and rotating high frequency sinusoidal and square wave signal injection methods with current or voltage response, at different reference frames, and selection of amplitude and frequency for injection signal Sensorless control techniques based on detecting third harmonic or zero-crossings of back-EMF waveforms Parasitic effects in fundamental and high frequency models, impacts on position estimation, and compensation schemes, covering cross-coupling magnetic saturation, load effect, machine saliency and multiple saliencies, inverter non-linearities, voltage and current harmonics, parameter asymmetries, and parameter mismatches Techniques for rotor initial position estimation, magnetic polarity detection, and transition between low and high speeds Describing basic principles, examples, challenges, and practical solutions, Sensorless Control of Permanent Magnet Synchronous Machine Drives is a highly comprehensive resource on the subject for professionals working on electrical machines and drives, particularly permanent magnet machines, and researchers working on electric vehicles, wind power generators, household appliances, and industrial automation.
Author: Paul R. Carr
Publisher: Routledge
ISBN: 1136281983
Category : Education
Languages : en
Pages : 320
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Book Description
What is the meaning of peace, why should we study it, and how should we achieve it? Although there are an increasing number of manuscripts, curricula and initiatives that grapple with some strand of peace education, there is, nonetheless, a dearth of critical, cross-disciplinary, international projects/books that examine peace education in conjunction with war and conflict. Within this volume, the authors contend that war/military conflict/violence are not a nebulous, far-away, mysterious venture; rather, they argue that we are all, collectively, involved in perpetrating and perpetuating militarization/conflict/violence inside and outside of our own social circles. Therefore, education about and against war can be as liberating as it is necessary. If war equates killing, can our schools avoid engaging in the examination of what war is all about? If education is not about peace, then is it about war? Can a society have education that willfully avoids considering peace as its central objective? Can a democracy exist if pivotal notions of war and peace are not understood, practiced, advocated and ensconced in public debate? These questions, according to Carr and Porfilio and the contributors they have assembled, merit a critical and extensive reflection. This book seeks to provide a range of epistemological, policy, pedagogical, curriculum and institutional analyses aimed at facilitating meaningful engagement toward a more robust and critical examination of the role that schools play (and can play) in framing war, militarization and armed conflict and, significantly, the connection to peace.
