16 results (0,15215 seconds)

Show all filters

Brand

Merchant

Price (EUR)

Reset filter

Products
From
Shops

Modern Permanent Magnet Electric Machines Theory and Control

Modern Permanent Magnet Electric Machines Theory and Control

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. | Modern Permanent Magnet Electric Machines Theory and Control

GBP 99.99
1

Permanent Magnet Synchronous Machines and Drives Flux Weakening Advanced Control Techniques

Permanent Magnet Synchronous Machines and Drives Flux Weakening Advanced Control Techniques

Permanent magnet synchronous motors (PMSMs) are popular in the electric vehicle industry due to their high-power density large torque-to-inertia ratio and high reliability. This book presents an improved field-oriented control (FOC) strategy for PMSMs that utilizes optimal proportional-integral (PI) parameters to achieve robust stability faster dynamic response and higher efficiency in the flux-weakening region. The book covers the combined design of a PI current regulator and varying switching frequency pulse-width modulation (PWM) along with an improved linear model predictive control (MPC) strategy. Researchers and graduate students in electrical engineering systems and control and electric vehicles will find this book useful. Features: • Implements evolutionary optimization algorithms to improve PMSM performance. • Provides coverage of PMSM control design in the flux-weakening region. • Proposes a modern method of model predictive control to improve the dynamic performance of interior PMSM. • Studies the dynamic performance of two kinds of PMSMs: surface-mounted and interior permanent magnet types. • Includes several case studies and illustrative examples with MATLAB®. This book is aimed at researchers graduate students and libraries in electrical engineering with specialization in systems and control and electric vehicles. | Permanent Magnet Synchronous Machines and Drives Flux Weakening Advanced Control Techniques

GBP 125.00
1

Control Strategies of Permanent Magnet Synchronous Motor Drive for Electric Vehicles

Control Strategies of Permanent Magnet Synchronous Motor Drive for Electric Vehicles

To reduce the emissions of greenhouse gasses and maintain environmental sustainability electric vehicles play a vital role in a modern energy-efficient environment. Permanent magnet synchronous motors (PMSMs) are widely employed in electric vehicle technology due to their high dynamic response better torque-speed characteristics noiseless operation high power density high efficiency and power factor as compared to other conventional motor drives. This book demonstrates the development of various control strategies and illustrates the dynamic performance intensification of a PMSM drive. To ensure the faster dynamic behaviour and flexibility in control under various operating conditions the performance of a PMSM drive has been explained. Finally control strategies have been executed through mathematical modelling and illustration of several case studies for optimal operation. Features: Introduces performance indicators in a self-controlled PMSM machine to justify the dynamic behaviour Discusses comparative performance study and optimization of the drive performance Provides a detailed comparative performance analysis between classical and fuzzy logic controllers in a PMSM drive Includes illustrations and case studies using mathematical modelling and real-time test results Discusses the state of the art in solar-powered energy-efficient PMSM drives with various issues This book is aimed at researchers graduate students and libraries in electrical engineering with specialization in electric vehicles. | Control Strategies of Permanent Magnet Synchronous Motor Drive for Electric Vehicles

GBP 140.00
1

London Patidars A Case Study in Urban Ethnicity

London Patidars A Case Study in Urban Ethnicity

First Published in 1980 London Patidars presents the case study of the Patidars a landowning caste from the Indian state of Gujarat in London. Patidars being the landowning caste has taken over much of the ideology of the merchant castes. This ‘merchant ideal’ is a central part of their self-image. It is an incitement to initiative in business and to some extent their actual economic behaviour does reflect the ideal. But the cases studied do not all conform to this ideal and they pose questions: How does this particular type of ethnic boundary relate to the opportunities of the individual Patidar? Why and how is this boundary maintained? Harald Tambs-Lyche concludes that the form given to the ethnic boundary is advantageous to many Patidars but not to all in the same degree. This raises problems which potentially could change the present pattern. Other potential problems relate to their relationship with the English. As successful merchants they risk becoming objects of envy like formerly the Jewish community. This book is a must read for scholars of ethnic and race relations and sociology. | London Patidars A Case Study in Urban Ethnicity

GBP 85.00
1

The Routledge Companion to Italian Fascist Architecture Reception and Legacy

The Routledge Companion to Italian Fascist Architecture Reception and Legacy

Today nearly a century after the National Fascist Party came to power in Italy questions about the built legacy of the regime provoke polemics among architects and scholars. Mussolini’s government constructed thousands of new buildings across the Italian Peninsula and islands and in colonial territories. From hospitals post offices and stadia to housing summer camps Fascist Party Headquarters ceremonial spaces roads railways and bridges the physical traces of the regime have a presence in nearly every Italian town. The Routledge Companion to Italian Fascist Architecture investigates what has become of the architectural and urban projects of Italian fascism how sites have been transformed or adapted and what constitutes the meaning of these buildings and cities today. The essays include a rich array of new arguments by both senior and early career scholars from Italy and beyond. They examine the reception of fascist architecture through studies of destruction and adaptation debates over reuse artistic interventions and even routine daily practices which may slowly alter collective understandings of such places. Paolo Portoghesi sheds light on the subject from his internal perspective while Harald Bodenschatz situates Italy among period totalitarian authorities and their symbols across Europe. Section editors frame synthesize and moderate essays that explore fascism’s afterlife; how the physical legacy of the regime has been altered and preserved and what it means now. This critical history of interpretations of fascist-era architecture and urban projects broadens our understanding of the relationships among politics identity memory and place. This companion will be of interest to students and scholars in a range of fields including Italian history architectural history cultural studies visual sociology political science and art history. | The Routledge Companion to Italian Fascist Architecture Reception and Legacy

GBP 42.99
1

Handbook of Research on School Choice

Handbook of Research on School Choice

Updated to reflect the latest developments and increasing scope of school-based options the second edition of the Handbook of Research on School Choice makes readily available the most rigorous and policy-relevant research on K–12 school choice. This comprehensive research handbook begins with scholarly overviews that explore historical political economic legal methodological and international perspectives on school choice. In the following sections experts examine the research and current state of common forms of school choice: charter schools school vouchers and magnet schools. The concluding section brings together perspectives on other key topics such as accountability tax credit scholarships parent decision-making and marginalized students. With empirical perspectives on all aspects of this evolving sphere of education this is a critical resource for researchers faculty and students interested in education policy the politics of education and educational leadership.

GBP 110.00
1

Cryogenic Engineering and Technologies Principles and Applications of Cryogen-Free Systems

Cryogenic Engineering and Technologies Principles and Applications of Cryogen-Free Systems

Cryogen-free cryogenics is leading a revolution in research and industry by its significant advantages over traditional liquid helium systems. This is the first overview for the field covering the key technologies conceptual design fabrication operation performance and applications of these systems. The contents cover important topics such as the operating principles of 4 K cryocoolers enabling technologies (including vibration reduction) for cryogen-free systems the cryogen-free superconducting magnet and cryogen-free systems that reach millikelvin. It highlights the wide range of applications in materials science quantum physics astronomy and space science medical sciences etc. Key features:• Introduces technologies and practical know-how employed for cryogen-free systems of using 4 K cryocoolers to replace liquid helium• Addresses state-of-the-art of cryogen-free superconducting magnets subkelvin refrigeration systems of the He-3 sorption cooler adiabatic demagnetization refrigerator (ADR) and dilution refrigerators (DR)• Discusses applications of cryogen-free systems in modern instruments and equipment | Cryogenic Engineering and Technologies Principles and Applications of Cryogen-Free Systems

GBP 44.99
1

AC Motor Control and Electrical Vehicle Applications

AC Motor Control and Electrical Vehicle Applications

AC Motor Control and Electrical Vehicle Applications provides a guide to the control of AC motors with a focus on its application to electric vehicles (EV). It describes the rotating magnetic flux based on which dynamic equations are derived. The text not only deals with the induction motor but covers the permanent magnet synchronous motors (PMSM). Additionally the control issues are discussed by taking into account the limitations of voltage and current. The latest edition includes more experimental data and expands upon the topics of inverter pulse width modulation methods loss minimizing control and vehicle dynamics. Various EV motor design issues are also reviewed while comparing typical types of PMSMs. FeaturesConsiders complete dynamic modeling of induction and PMSM in the rotating frame. Provides various field-oriented controls while covering advanced topics in PMSM high speed control loss minimizing control and sensorless control. Covers inverter sensors vehicle dynamics driving cycles etc. not just motor control itself. Offers a comparison between BLDC surface PMSM and interior PMSM. Discusses how the motor produces torque and is controlled based on consistent mathematical treatments.

GBP 48.99
1

Pivotal Lines in Shakespeare and Others Finding the Heart of the Play

Pivotal Lines in Shakespeare and Others Finding the Heart of the Play

Sidney Homan defines a pivotal line as “a moment in the script that serves as a pathway into the larger play … a magnet to which the rest of the play scenes before and after adheres. ” He offers his personal choices of such lines in five plays by Shakespeare and works by Beckett Brecht Pinter Shepard and Stoppard. Drawing on his own experience in the theatre as actor and director and on campus as a teacher and scholar he pairs a Shakespearean play with one by a modern playwright as mirrors for each other. One reviewer calls his approach “ground-breaking. ” Another observes that his “experience with the particular plays he has chosen is invaluable” since it allows us to find “a wedge into such iconic texts. ” Academics and students alike will find this volume particularly useful in aiding their own discovery of a pivotal line or moment in the experience of reading about watching or performing in a play. | Pivotal Lines in Shakespeare and Others Finding the Heart of the Play

GBP 130.00
1

Performance of DFIG and PMSG Wind Turbines

Performance of DFIG and PMSG Wind Turbines

Due to environmental pollution and climate change the use of renewable energy sources as an alternative means of power generation is on the rise globally. This is because of their clean nature which makes them ecofriendly with little or no pollution compared to the traditional fossil fuel power-generation power plants. Among the various renewable energy sources wind energy is one of the most widely employed due to its promising technology. Wind turbine technologies could be classified into two groups as follows: Fixed Speed Wind Turbines (FSWTs) and Variable Speed Wind Turbines (VSWTs). There have been tremendous improvements in wind turbine technology over the years from FSWTs to VSWTs as a result of fast innovations and advanced developments in power electronics. Thus the VSWTs have better wind energy capture and conversion efficiencies less acoustic noise and mechanical stress and better power quality in power grids without support from external reactive power compensators due to the stochastic nature of wind energy. The two most widely employed VSWTs in wind farm development are the Doubly Fed Induction Generator (DFIG) and the Permanent Magnet Synchronous Generator (PMSG) wind turbines. In order to solve transient stability intricacies during power grid faults this book proposes different control strategies for the DFIG and PMSG wind turbines. | Performance of DFIG and PMSG Wind Turbines

GBP 74.99
1

Community Colleges as Incubators of Innovation Unleashing Entrepreneurial Opportunities for Communities and Students

Community Colleges as Incubators of Innovation Unleashing Entrepreneurial Opportunities for Communities and Students

While community colleges have traditionally focused on providing students with opportunities to gain credentials for employment the increasingly important question is: Are they preparing students for the looming dynamic disruptive and entrepreneurial environments ahead? This book addresses the urgent need for community colleges to prioritize entrepreneurship education both to remain relevant in a changing economy and to give graduate students the flexible and interdisciplinary mindsets needed for the future of society. It argues that entrepreneurial education should be offered broadly to a wide range of students and across all disciplines; defines the key constructs for achieving this objective; and describes how to create entrepreneurial learning environments. The expert contributors with the support of the National Association for Community College Entrepreneurship (NACCE) start from the premise that community colleges are uniquely positioned to lead entrepreneurial initiatives through both internally-generated curriculum design and through collaboration with the local entrepreneurial community to build bridges between the classroom to the community which in turn can offer models of implementation and constitute a network or support system for students. Community colleges can become incubators of innovation a magnet for talent and provide the impetus for development strategies that their communities have not begun to realize. As the chapters make clear developing an entrepreneurial program itself requires an entrepreneurial mindset that transcends any lack of resources requiring a spirit of imagination and resourcefulness. This book takes the reader on a journey through the steps needed to build a meaningful relevant and sustainable entrepreneurship program covering program development curriculum design appropriate pedagogical approaches and community engagement. | Community Colleges as Incubators of Innovation Unleashing Entrepreneurial Opportunities for Communities and Students

GBP 32.99
1

Diagnostic MRI in Dogs and Cats

Diagnostic MRI in Dogs and Cats

Diagnostic MRI in Dogs and Cats makes the vast and increasingly complex topic of clinical MRI in small animals accessible to all veterinarians. With the increasing availability of MRI technology there is also a pressing need for expertise in interpreting these images. This is the first reference textbook to provide a well-illustrated and comprehensive overview of the current knowledge focusing on imaging appearance rather than on clinical signs or treatment. With chapters on MRI physics and technology as well as sections on specific anatomical regions the book functions as a stand-alone reference for the reader whether they be a radiology/neurology resident in training or a practitioner with a need to learn about veterinary clinical MRI. Includes both evidenced-based material and the authors' personal experience providing an excellent overview of current knowledge in the field. Contributors are international leaders in the field. Bullet points format and table summaries throughout the book keep the concepts concise and organized. Richly illustrated with over 650 annotated images showcasing the main features of the disease processes. Images are obtained at all magnet field strengths so as to reflect the current reality of veterinary MRI which uses low- mid- and high-field magnets. The chapters on physics and MRI technology are concise and accessible using many visual aids and diagrams and avoiding abstract concepts and equations whenever possible. Within each anatomical section each chapter focuses on a disease category of that body region. When it is important to understand the imaging appearance the pathophysiology is reviewed and imaging features of prognostic relevance are detailed. This practical yet thoroughly comprehensive book is primarily an evidence-based learning resource for trainees but will also aid practising veterinarians who have less MRI experience.

GBP 240.00
1

Electric and Hybrid Vehicles Design Fundamentals

Electric and Hybrid Vehicles Design Fundamentals

A thoroughly revised third edition of this widely praised bestselling textbook presents a comprehensive systems-level perspective of electric and hybrid vehicles with emphasis on technical aspects mathematical relationships and basic design guidelines. The emerging technologies of electric vehicles require the dedication of current and future engineers so the target audience for the book is the young professionals and students in engineering eager to learn about the area. The book is concise and clear its mathematics are kept to a necessary minimum and it contains a well-balanced set of contents of the complex technology. Engineers of multiple disciplines can either get a broader overview or explore in depth a particular aspect of electric or hybrid vehicles. Additions in the third edition include simulation-based design analysis of electric and hybrid vehicles and their powertrain components particularly that of traction inverters electric machines and motor drives. The technology trends to incorporate wide bandgap power electronics and reduced rare-earth permanent magnet electric machines in the powertrain components have been highlighted. Charging stations are a critical component for the electric vehicle infrastructure and hence a chapter on vehicle interactions with the power grid has been added. Autonomous driving is another emerging technology and a chapter is included describing the autonomous driving system architecture and the hardware and software needs for such systems. The platform has been set in this book for system-level simulations to develop models using various softwares used in academia and industry such as MATLAB®/Simulink PLECS PSIM Motor-CAD and Altair Flux. Examples and simulation results are provided in this edition using these software tools. The third edition is a timely revision and contribution to the field of electric vehicles that has reached recently notable markets in a more and more environmentally sensitive world. | Electric and Hybrid Vehicles Design Fundamentals

GBP 46.99
1

Shipboard Propulsion Power Electronics and Ocean Energy

Shipboard Propulsion Power Electronics and Ocean Energy

Shipboard Propulsion Power Electronics and Ocean Energy fills the need for a comprehensive book that covers modern shipboard propulsion and the power electronics and ocean energy technologies that drive it. With a breadth and depth not found in other books it examines the power electronics systems for ship propulsion and for extracting ocean energy which are mirror images of each other. Comprised of sixteen chapters the book is divided into four parts: Power Electronics and Motor Drives explains basic power electronics converters and variable-frequency drives cooling methods and quality of power Electric Propulsion Technologies focuses on the electric propulsion of ships using recently developed permanent magnet and superconducting motors as well as hybrid propulsion using fuel cell photovoltaic and wind power Renewable Ocean Energy Technologies explores renewable ocean energy from waves marine currents and offshore wind farms System Integration Aspects discusses two aspects—energy storage and system reliability—that are essential for any large-scale power system This timely book evolved from the author’s 30 years of work experience at General Electric Lockheed Martin and Westinghouse Electric and 15 years of teaching at the U. S. Merchant Marine Academy. As a textbook it is ideal for an elective course at marine and naval academies with engineering programs. It is also a valuable reference for commercial and military shipbuilders port operators renewable ocean energy developers classification societies machinery and equipment manufacturers researchers and others interested in modern shipboard power and propulsion systems. The information provided herein does not necessarily represent the view of the U. S. Merchant Marine Academy or the U. S. Department of Transportation. This book is a companion to Shipboard Electrical Power Systems (CRC Press 2011) by the same author.

GBP 74.99
1

Switched Reluctance Motor Drives Fundamentals to Applications

Switched Reluctance Motor Drives Fundamentals to Applications

Electric motors are the largest consumer of electric energy and they play a critical role in the growing market for electrification. Due to their simple construction switched reluctance motors (SRMs) are exceptionally attractive for the industry to respond to the increasing demand for high-efficiency high-performance and low-cost electric motors with a more secure supply chain. Switched Reluctance Motor Drives: Fundamentals to Applications is a comprehensive textbook covering the major aspects of switched reluctance motor drives. It provides an overview of the use of electric motors in the industrial residential commercial and transportation sectors. It explains the theory behind the operation of switched reluctance motors and provides models to analyze them. The book extensively concentrates on the fundamentals and applications of SRM design and covers various design details such as materials mechanical construction and controls. Acoustic noise and vibration is the most well-known issue in switched reluctance motors but this can be reduced significantly through a multidisciplinary approach. These methodologies are explained in two chapters of the book. The first covers the fundamentals of acoustic noise and vibration so readers have the necessary tools to analyze the problems and explains the surface waves spring-mass models forcing harmonics and mode shapes that are utilized in modeling and analyzing acoustic noise and vibration. The second applies these fundamentals to switched reluctance motors and provides examples for determining the sources of any acoustic noise in switched reluctance motors. In the final chapter two SRM designs are presented and proposed as replacements for permanent magnet machines in a residential HVAC application and a hybrid-electric propulsion application. It also shows a high-power and compact converter design for SRM drives. Features:Comprehensive coverage of switched reluctance motor drives from fundamental principles to design operation and applicationsA specific chapter on electric motor usage in industrial residential commercial and transportation applications to address the benefits of switched reluctance machinesTwo chapters address acoustic noise and vibration in detailNumerous illustrations and practical examples on the design modeling and analysis of switched reluctance motor drivesExamples of switched reluctance motor and drive design | Switched Reluctance Motor Drives Fundamentals to Applications

GBP 56.99
1

Small Signal Audio Design

Small Signal Audio Design

Small Signal Audio Design is a highly practical handbook providing an extensive repertoire of circuits that can be assembled to make almost any type of audio system. The publication of Electronics for Vinyl has freed up space for new material (though this book still contains a lot on moving-magnet and moving-coil electronics) and this fully revised third edition offers wholly new chapters on tape machines guitar electronics and variable-gain amplifiers plus much more. A major theme is the use of inexpensive and readily available parts to obtain state-of-the-art performance for noise distortion crosstalk frequency response accuracy and other parameters. Virtually every page reveals nuggets of specialized knowledge not found anywhere else. For example you can improve the offness of a fader simply by adding a resistor in the right place- if you know the right place. Essential points of theory that bear on practical audio performance are lucidly and thoroughly explained with the mathematics kept to an absolute minimum. Self’s background in design for manufacture ensures he keeps a wary eye on the cost of things. This book features the engaging prose style familiar to readers of his other books. You will learn why mercury-filled cables are not a good idea the pitfalls of plating gold on copper and what quotes from Star Trek have to do with PCB design. Learn how to: make amplifiers with apparently impossibly low noise design discrete circuitry that can handle enormous signals with vanishingly low distortion use humble low-gain transistors to make an amplifier with an input impedance of more than 50 megohms transform the performance of low-cost-opamps build active filters with very low noise and distortion make incredibly accurate volume controls make a huge variety of audio equalisers make magnetic cartridge preamplifiers that have noise so low it is limited by basic physics by using load synthesis sum switch clip compress and route audio signals be confident that phase perception is not an issue This expanded and updated third edition contains extensive new material on optimising RIAA equalisation electronics for ribbon microphones summation of noise sources defining system frequency response loudness controls and much more. Including all the crucial theory but with minimal mathematics Small Signal Audio Design is the must-have companion for anyone studying researching or working in audio engineering and audio electronics.

GBP 74.99
1