Download or read book Control of Electrical Drives written by Werner Leonhard and published by Springer Science & Business Media. This book was released on 2001-08-10 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical drives play an important role as electromechanical energy convert ers in transportation, material handling and most production processes. The ease of controlling electrical drives is an important aspect for meeting the in creasing demands by the user with respect to flexibility and precision, caused by technological progress in industry as well as the need for energy conser vation. At the same time, the control of electrical drives has provided strong incentives to control engineering in general, leading to the development of new control structures and their introduction to other areas of control. This is due to the stringent operating conditions and widely varying specifications - a drive may alternately require control of torque, acceleration, speed or position - and the fact that most electric drives have - in contrast to chem ical or thermal processes - well defined structures and consistent dynamic characteristics. During the last years the field of controlled electrical drives has undergone rapid expansion due mainly to the advances of semiconductors in the form of power electronics as well as analogue and digital signal electronics, eventu ally culminating in microelectronics and microprocessors. The introduction of electronically switched solid-state power converters has renewed the search for adjustable speed AC motor drives, not subject to the limitations of the mechanical commutator of DC drives which dominated the field for a century.

Download or read book Instantaneous Power Theory and Applications to Power Conditioning written by Hirofumi Akagi and published by John Wiley & Sons. This book was released on 2017-03-06 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers instantaneous power theory as well as the importance of design of shunt, series, and combined shunt-series power active filters and hybrid passive-active power filters Illustrates pioneering applications of the p-q theory to power conditioning, which highlights distinct differences from conventional theories Explores p-q-r theory to give a new method of analyzing the different powers in a three-phase circuit Provides exercises at the end of many chapters that are unique to the second edition

Download or read book Citizens and the European Polity written by David Sanders and published by Oxford University Press. This book was released on 2012-07-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a broad overview of the main trends in mass attitudes towards domestic politics and European integration from the 1970s until today. Particularly in the last two decades, the "end of the permissive consensus" around European integration has forced analysts to place public opinion at the centre of their concerns. The book faces this challenge head on, and the overview it provides goes well beyond the most commonly used indicators. On the one hand, it shows how integration's deepening and enlargement involved polities and societies whose fundamental traits in terms of political culture - regime support, political engagement, ideological polarization - have remained anything but static or homogeneous. On the other hand, it addresses systematically what Scharpf (1999) has long identified as the main sources of the democratic deficits of the EU: the lack of a sense of collective identity, the lack of a Europe-wide structure for political accountability, and the lack of recognition of the EU as a legitimate political authority. In other words, it focuses on the fundamental dimensions of how Europeans relate to the EU: identity (the sense of an "European political community"; representation (the perception that European elites and institutions articulate citizens' interests and are responsive to them); and policy scope (the legitimacy awarded to the EU as a proper locus of policy-making). It does so by employing a cohesive theoretical framework derived from the entire IntUne project, survey and macro-social data encompassing all EU member countries, and state-of-the-art methods. The IntUne series is edited by Maurizio Cotta and Pierangelo Isernia In a moment in which the EU is facing an important number of social, economic, political and cultural challenges, and its legitimacy and democratic capacities are increasingly questioned, it seems particularly important to address the issue of if and how EU citizenship is taking shape. This series intends to address this complex issue. It reports the main results of a quadrennial Europe-wide research project, financed under the 6th Framework Programme of the EU. That programme has studied the changes in the scope, nature and characteristics of citizenship presently underway as a result of the process of deepening and enlargement of the European Union. The INTUNE Project - Integrated and United: A Quest for Citizenship in an Ever Closer Europe - is one of the most recent and ambitious research attempts to empirically study how citizenship is changing in Europe. The Project lasted four years (2005-2009) and it involved 30 of the most distinguished European universities and research centres, with more than 100 senior and junior scholars as well as several dozen graduate students working on it. It had as its main focus an examination of how integration and decentralization processes, at both the national and European level, are affecting three major dimensions of citizenship: identity, representation, and scope of governance. It looked, in particular, at the relationships between political, social and economic elites, the general public, policy experts and the media, whose interactions nurture the dynamics of collective political identity, political legitimacy, representation, and standards of performance. In order to address empirically these issues, the INTUNE Project carried out two waves of mass and political, social and economic elite surveys in 18 countries, in 2007 and 2009; in-depth interviews with experts in five policy areas; extensive media analysis in four countries; and a documentary analysis of attitudes toward European integration, identity and citizenship. The book series presents and discusses in a coherent way the results coming out of this extensive set of new data.

Download or read book Religion and the Rise of Capitalism written by Benjamin M. Friedman and published by Knopf. This book was released on 2021 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author demonstrates that the foundational transition in thinking about what is now called economics, beginning in the 18th century, was decisively shaped by the hotly contended lines of religious thought within the English-speaking Protestant world.

Download or read book India Major Manufacturers written by and published by Business Information Agency. This book was released on with total page 1963 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book European Union Law written by Alina Kaczorowska-Ireland and published by Routledge. This book was released on 2012-09-10 with total page 973 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its second edition, European Union Law has been fully revised and updated following the entry into force of the Lisbon Treaty in December 2009. The book contains entirely new chapters on the Protection of Human Rights in the EU; the Area of Freedom, Security and Justice and the Common Foreign and Security Policy. Specifically written to give law students detailed up-to-date knowledge of all main areas of EU law, the book provides an in-depth and detailed examination of, and commentary on the areas of institutional and of substantive EU law forming the syllabus of standard academic courses on EU law. Unlike other texts this book successfully combines authoritative text with case summaries and judgments, these being highlighted in colour tinted boxes for easy identification. The author identifies the relevant points and key facts of the leading cases and discusses the judgments in detail, often in the light of subsequent developments. Student-friendly features include: short summaries at the beginning of each chapter outlining the topics and concepts covered an aide-memoire at the end of each chapter to highlight and reflect the main points a recommended reading list at the end of each chapter to facilitate further research a map identifying EU Member States (with accession dates) and candidate states a Companion Website featuring updates twice yearly; annotated links to online sources of interest and essay style self-test questions with suggested answers. This book is an essential resource for those studying EU law on both undergraduate and postgraduate courses and will be of interest to students of political science, social science and business studies.

Download or read book Three phase AC AC Power Converters Based on Matrix Converter Topology written by Paweł Szcześniak and published by Springer Science & Business Media. This book was released on 2013-02-28 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: AC voltage frequency changes is one of the most important functions of solid state power converters. The most desirable features in frequency converters are the ability to generate load voltages with arbitrary amplitude and frequency, sinusoidal currents and voltages waveforms; the possibility of providing unity power factor for any load; and, finally, a simple and compact power circuit. Over the past decades, a number of different frequency converter topologies have appeared in the literature, but only the converters with either a voltage or current DC link are commonly used in industrial applications. Improvements in power semiconductor switches over recent years have resulted in the development of many structures of AC-AC converters without DC electric energy storage. Such converters are an alternative solution for frequently recommended systems with DC energy storage and are characterized by a lower price, smaller size and longer lifetime. Most of the these topologies are based on the structure of the matrix converter. Three-Phase AC-AC Power Converters Based On Matrix Converter Topology: Matrix-reactance frequency converters concept presents a review of power frequency converters, with special attention paid to converters without DC energy storage. Particular attention is paid to nine new converters named matrix-reactance frequency converters which have been developed by the author and the team of researchers from Institute of Electrical Engineering at the University of Zielona Góra. The topologies of the presented matrix-reactance frequency converters are based on a three-phase unipolar buck-boost matrix-reactance chopper with source or load switches arranged as in a matrix converter. This kind of approach makes it possible to obtain an output voltage greater than the input one (similar to that in a matrix-reactance chopper) and a frequency conversion (similar to that in a matrix converter). Written for researchers and Ph.D. students working in the field of power electronics converters and drive systems, Three-Phase AC-AC Power Converters Based On Matrix Converter Topology: Matrix-reactance frequency converters concept will also be valuable to power electronics converter designers and users; R&D centers; and readers needing industry solutions in variable speed drive systems, such as automation and aviation.

Download or read book Algorithms and Architectures for Real Time Control 1991 written by P.J. Fleming and published by Elsevier. This book was released on 2014-07-22 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer scientists have long appreciated that the relationship between algorithms and architecture is crucial. Broadly speaking the more specialized the architecture is to a particular algorithm then the more efficient will be the computation. The penalty is that the architecture will become useless for computing anything other than that algorithm. This message holds for the algorithms used in real-time automatic control as much as any other field. These Proceedings will provide researchers in this field with a useful up-to-date reference source of recent developments.

Download or read book 1991 1992 written by Brian Hunter and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-06-21 with total page 1734 pages. Available in PDF, EPUB and Kindle. Book excerpt: No detailed description available for "1991-1992".

Download or read book Fifth European Conference on Power Electronics and Applications written by and published by . This book was released on 1993 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Coptic Version of the New Testament in the Southern dialect otherwise called Sahidic and Thebaic with critical apparatus literal English translation register of fragments and estimate of the version written by and published by . This book was released on 1911 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Permanent Magnet Synchronous and Brushless DC Motor Drives written by Ramu Krishnan and published by CRC Press. This book was released on 2017-12-19 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Current Bibliographies in Medicine written by and published by . This book was released on 1988 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Axial Flux Permanent Magnet Brushless Machines written by Jacek F. Gieras and published by Springer Science & Business Media. This book was released on 2008-03-26 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Axial Flux Permanent Magnet (AFPM) brushless machines are modern electrical machines with a lot of advantages over their conventional counterparts. This timeless and revised second edition deals with the analysis, construction, design, control and applications of AFPM machines. The authors present their own research results, as well as significant research contributions made by others.

Download or read book The Statesman s Yearbook 1991 92 written by NA NA and published by Springer. This book was released on 2016-12-29 with total page 1719 pages. Available in PDF, EPUB and Kindle. Book excerpt: The classic reference work that provides annually updated information on the countries of the world.

Download or read book Alternative Energy Systems written by M. Godoy Simões and published by CRC Press. This book was released on 2007-12-10 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: New perspectives on using induction generators in alternative energy technologies Durable and cost-effective, induction power generators have undergone numerous improvements that make them an increasingly attractive option for renewable energy applications, particularly for wind and hydropower generation systems. From fundamental concepts to the latest technologies, Alternative Energy Systems: Design and Analysis with Induction Generators, Second Edition provides detailed and accurate coverage of all aspects related to the design, operation, and overall analysis of such systems. Placing a greater emphasis on providing clear, precise, and succinct explanations, this second edition features new, revised, and updated content as well as figures, tables, equations, and examples. Each chapter introduces a multi-step, chapter-length problem relating the material to a real application. The solution appears at the end of the chapter, along with additional practice problems and references. New Material in This Edition: Updated definitions for generated power and efficiency Technological advances, such as new applications using doubly-fed induction generators New methodologies, such as the magnetization curve representation for induction generators Additional focus on renewable energy applications such as sea, wind, and hydropower systems Totally re-written and updated chapter covering doubly-fed induction generators Alternative Energy Systems provides the tools and expertise for advanced students and professionals in electrical, mechanical, civil, and environmental engineering involved in the development of power plants. ";