Narrow your search
Listing 1 - 10 of 13 << page
of 2
>>
Sort by

Book
IRST 2012 : 12th IET International Conference on Ionospheric Radio Systems and Techniques : 15-17 May 2012.
Author:
ISBN: 1849196230 Year: 2012 Publisher: Stevenage, England : IET,

Loading...
Export citation

Choose an application

Bookmark

Abstract

Angle modulation : the theory of system assessment
Author:
ISBN: 0901223956 9780901223951 Year: 1977 Publisher: Stevenage : Peter Peregrinus,

Early FM Radio : Incremental Technology in Twentieth-Century America
Author:
ISBN: 0801899133 0801894409 Year: 2010 Publisher: Baltimore, Md. : Johns Hopkins University Press,

Loading...
Export citation

Choose an application

Bookmark

Abstract

"The commonly accepted history of FM radio is one of the twentieth century's iconic sagas of invention, heroism, and tragedy. Edwin Howard Armstrong created a system of wideband frequency-modulation radio in 1933. The Radio Corporation of America (RCA), convinced that Armstrong's system threatened its AM empire, failed to develop the new technology and refused to pay Armstrong royalties. Armstrong sued the company at great personal cost. He died despondent, exhausted, and broke." "But this account, according to Gary L. Frost, ignores the contributions of scores of other individuals who were involved in the decades-long struggle to realize the potential of FM radio. The first scholar to fully examine recently uncovered evidence from the Armstrong v. RCA lawsuit, Frost offers a thorough revision of the FM story." "Frost's balanced, contextualized approach provides a much-needed corrective to previous accounts. Navigating deftly through the details of a complicated story, he examines the motivations and interactions of the three communities most intimately involved in the development of the technology - Progressive-era amateur radio operators, RCA and Westinghouse engineers, and early FM broadcasters. In the process, Frost demonstrates the tension between competition and collaboration that goes hand in hand with the emergence and refinement of new technologies." "Frost's study reconsiders both the social construction of FM radio and the process of technological evolution. Historians of technology, communication, and media will welcome this important reexamination of the canonic story of early FM radio."--Jacket.

RF photonic technology in optical fiber links
Author:
ISBN: 9780521803755 9780511755729 9780521037082 0521037085 1280418362 9786610418367 0511169655 1139147269 0511057288 0511755724 0511331142 0511072074 1107130875 051106361X 9780511063619 9781280418365 9780511072079 0521803756 9781107130876 6610418365 9780511169656 9781139147262 9780511057281 9780511331145 Year: 2002 Publisher: Cambridge : Cambridge University Press,

Loading...
Export citation

Choose an application

Bookmark

Abstract

In many applications, radio frequency (RF) signals need to be transmitted and processed without being digitalized. Optical fiber provides a transmission medium in which RF modulated optical carriers can be transmitted and distributed with very low loss, making it more efficient and less costly than conventional electronic systems. This volume presents a review of RF photonic components, transmission systems, and signal processing examples in optical fibers from leading academic, government, and industry scientists working in this field. It also introduces the reader to various related technologies such as direct modulation of laser sources, external modulation techniques, and detectors. The text is aimed at engineers and scientists engaged in the research and development of optical fibers and analog RF applications. With an emphasis on design, performance and practical application, this book will be of particular interest to those developing systems based on this technology.

Phase-Modulated Optical Communication Systems
Author:
ISBN: 1280312041 9786610312047 0387255559 0387243925 1441937374 Year: 2005 Publisher: New York, NY : Springer US : Imprint: Springer,

Loading...
Export citation

Choose an application

Bookmark

Abstract

Fiber-optic communication systems have revolutionized our telecommunication infrastructures – currently, almost all telephone land-line, cellular, and internet communications must travel via some form of optical fibers. In these transmission systems, neither the phase nor frequency of the optical signal carries information – only the intensity of the signal is used. To transmit more information in a single optical carrier, the phase of the optical carrier must be explored. As a result, there is renewed interest in phase-modulated optical communications, mainly in direct-detection DPSK signals for long-haul optical communication systems. When optical amplifiers are used to maintain certain signal level among the fiber link, the system is limited by amplifier noises and fiber nonlinearities. Phase-Modulated Optical Communication Systems surveys this newly popular area, covering the following topics: The transmitter and receiver for phase-modulated coherent lightwave systems Method for performance analysis of phase-modulated optical signals Direct-detection DPSK signal with fiber nonlinearities, degraded by nonlinear phase noise and intrachannel effects Wavelength-division-multiplexed direct-detection DPSK signals Multi-level phase-modulated optical signals, such as the four-phase DQPSK signal Graduate students, professional engineers, and researchers will all benefit from this updated treatment of an important topic in the optical communications field.


Book
Design of ultra-low power impulse radios
Authors: --- ---
ISBN: 1461418445 1461418453 Year: 2014 Publisher: New York : Springer,

Loading...
Export citation

Choose an application

Bookmark

Abstract

This book covers the fundamental principles behind the design of ultra-low power radios and how they can form networks to facilitate a variety of applications within healthcare and environmental monitoring, since they may operate for years off a small battery or even harvest energy from the environment. These radios are distinct from conventional radios in that they must operate with very constrained resources and low overhead.  This book provides a thorough discussion of the challenges associated with designing radios with such constrained resources, as well as fundamental design concepts and practical approaches to implementing working designs.  Coverage includes integrated circuit design, timing and control considerations, fundamental theory behind low power and time domain operation, and network/communication protocol considerations.   • Enables detailed understanding of the design space for ultra-low power radio; • Provides detailed discussion and examples of the design of a practical low power radio network; • Compares a variety of low power transmission and radio styles, including traditional continuous wave radio, wake up radios, and impulse radios; • Includes detailed design techniques and examples of integrated circuits for low power impulse radio transceivers, with discussion of timing control and synchronization.  .


Book
Radio Frequency Modulation Made Easy
Author:
ISBN: 3319412000 3319412027 Year: 2017 Publisher: Cham : Springer International Publishing : Imprint: Springer,

Loading...
Export citation

Choose an application

Bookmark

Abstract

This book introduces Radio Frequency Modulation to a broad audience. The author blends theory and practice to bring readers up-to-date in key concepts, underlying principles and practical applications of wireless communications. The presentation is designed to be easily accessible, minimizing mathematics and maximizing visuals.


Book
Advances in Rotating Electric Machines
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

Loading...
Export citation

Choose an application

Bookmark

Abstract

It is difficult to imagine a modern society without rotating electric machines. Their use has been increasing not only in the traditional fields of application but also in more contemporary fields, including renewable energy conversion systems, electric aircraft, aerospace, electric vehicles, unmanned propulsion systems, robotics, etc. This has contributed to advances in the materials, design methodologies, modeling tools, and manufacturing processes of current electric machines, which are characterized by high compactness, low weight, high power density, high torque density, and high reliability. On the other hand, the growing use of electric machines and drives in more critical applications has pushed forward the research in the area of condition monitoring and fault tolerance, leading to the development of more reliable diagnostic techniques and more fault-tolerant machines. This book presents and disseminates the most recent advances related to the theory, design, modeling, application, control, and condition monitoring of all types of rotating electric machines.

Keywords

History of engineering & technology --- core saturation --- cross-coupling inductance --- wound synchronous machines (WSM) --- signal injection --- position sensorless --- high-frequency model --- hybrid permanent magnet --- interior permanent magnet (IPM) machine --- magnet-axis-shifted --- reluctance torque --- Sensorless --- induction motors --- H_infinity --- drives --- vector control --- experimental implementation --- direct torque control --- duty cycle control --- harmonic currents --- six-phase induction motor --- torque ripple --- interior permanent magnet synchronous motor (IPMSM) --- sensorless control --- adaptive algorithm --- super-twisting sliding mode observer (STO) --- phase-locked loop (PLL) --- permanent-magnet vernier machine --- in-wheel direct-drive --- outer rotor --- overhang --- soft magnetic composite --- reaction sphere --- spherical motor --- structural design --- torque density optimization --- support vector machines --- finite element method --- induction motor --- smart-sensor --- stray flux --- time-frequency transforms --- wavelet entropy --- harmonic modeling method --- magnetic-geared machine --- hybrid electric vehicle --- magnetic field --- electromagnetic performance --- analytical modeling --- brushless DC motor --- commutation torque ripple --- back electromotive force --- multiphase machines --- fault-tolerance --- dual-channel --- brushless direct current motor with permanent magnet (BLDCM) --- switched reluctance motor (SRM) --- active flux --- stator flux observation --- super-twisting sliding-mode stator flux observer (STSMFO) --- deep-bar effect --- mathematical model --- estimation --- motor drives --- direct torque control (DTC) --- permanent magnet synchronous motor (PMSM) --- maximum torque per ampere (MTPA) operation --- DTC with space-vector modulation (DTC-SVM) --- AFPMSM --- analytical algorithm --- vibration noise --- temperature field analysis --- SynRM --- irreversible demagnetization --- PMa-SynRM --- flux intensifying --- deadbeat current control --- PMSM servo motor drives --- auto tuning --- parameter identification --- periodic controller --- surface permanent magnet synchronous motor --- fault-tolerant system --- multi-channel --- quad-channel operation (QCO) --- triple-channel operation (TCO) --- dual-channel operation (DCO) --- single-channel operation (SCO) --- permanent magnet brushless direct current motor --- BLDCM --- double Fourier analysis --- current spectrum decomposition --- eddy current loss --- permanent magnet machine design --- cogging torque --- permanent magnet machine --- uneven magnets --- IPMSM --- uncertainty and disturbance estimator --- flux-weakening control --- double-cage induction motor --- improvement of motor reliability --- cage winding constructions --- direct start-up --- coupled electromagnetic-thermal model --- outer rotor inductor --- electric vehicle --- high-efficiency --- eco-friendly --- automation --- finite element analysis --- PMSM --- DOE --- optimization --- metamodeling --- adaptive robust control --- energy feedback --- particle swarm optimization --- torque optimal distribution method --- multiphase electric drives --- six-phase machines --- finite control set model predictive control --- predictive current control --- predictive torque control --- high frequency square-wave voltage --- interior permanent-magnet synchronous motor (IPMSM) --- magnetic polarity detection --- rotor position estimation --- characteristics analysis --- fault detection --- stator fault --- rotor fault --- torque estimation --- finite control set mode predictive control --- duty cycle --- maximum torque per ampere --- permanent magnet synchronous motor --- acoustics --- boundary element method --- electric machines --- magneto-mechanics --- modeling --- noise --- vibro-acoustics --- efficiency --- line-start synchronous reluctance motor --- permanent magnet --- power factor --- multiphase --- induction --- motor --- space harmonics --- time harmonics --- injection --- high-speed permanent synchronous motor --- magnetic field characteristic --- iron loss --- stator structure --- online parameters estimation --- permanent magnet synchronous machines --- synchronous reluctance machines --- high frequency signal injection --- CMV --- modulation techniques --- PWM --- railway traction drives --- induction motor drives --- high-speed drives --- overmodulation and six-step operation --- electrical motors --- sot filling factor --- optimization algorithm --- windings --- magnetic wire --- filling factor optimization --- electric drive --- transmission shaft --- electric transmission line --- electrical and mechanical similarities --- kinematic structure --- equivalent circuit --- mathematical modelling --- failure --- detection --- diagnosis --- BLDC --- brushless --- systematic review --- rotor position --- BLDC motor --- sensor misalignment --- sizing methodology --- electrical machines --- thermal model --- electromagnetic model --- switched reluctance motor --- torque sharing functions --- firing angle modulation --- autonomous systems --- brushless synchronous generator --- electric power generation --- high speed generator --- high resistance connection --- fault-detection --- fault-tolerant control --- six-phase permanent magnet synchronous machines --- field-oriented control


Book
Advances in Rotating Electric Machines : Volume 2
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

Loading...
Export citation

Choose an application

Bookmark

Abstract

It is difficult to imagine a modern society without rotating electric machines. Their use has been increasing not only in the traditional fields of application but also in more contemporary fields, including renewable energy conversion systems, electric aircraft, aerospace, electric vehicles, unmanned propulsion systems, robotics, etc. This has contributed to advances in the materials, design methodologies, modeling tools, and manufacturing processes of current electric machines, which are characterized by high compactness, low weight, high power density, high torque density, and high reliability. On the other hand, the growing use of electric machines and drives in more critical applications has pushed forward the research in the area of condition monitoring and fault tolerance, leading to the development of more reliable diagnostic techniques and more fault-tolerant machines. This book presents and disseminates the most recent advances related to the theory, design, modeling, application, control, and condition monitoring of all types of rotating electric machines.

Keywords

History of engineering & technology --- core saturation --- cross-coupling inductance --- wound synchronous machines (WSM) --- signal injection --- position sensorless --- high-frequency model --- hybrid permanent magnet --- interior permanent magnet (IPM) machine --- magnet-axis-shifted --- reluctance torque --- Sensorless --- induction motors --- H_infinity --- drives --- vector control --- experimental implementation --- direct torque control --- duty cycle control --- harmonic currents --- six-phase induction motor --- torque ripple --- interior permanent magnet synchronous motor (IPMSM) --- sensorless control --- adaptive algorithm --- super-twisting sliding mode observer (STO) --- phase-locked loop (PLL) --- permanent-magnet vernier machine --- in-wheel direct-drive --- outer rotor --- overhang --- soft magnetic composite --- reaction sphere --- spherical motor --- structural design --- torque density optimization --- support vector machines --- finite element method --- induction motor --- smart-sensor --- stray flux --- time-frequency transforms --- wavelet entropy --- harmonic modeling method --- magnetic-geared machine --- hybrid electric vehicle --- magnetic field --- electromagnetic performance --- analytical modeling --- brushless DC motor --- commutation torque ripple --- back electromotive force --- multiphase machines --- fault-tolerance --- dual-channel --- brushless direct current motor with permanent magnet (BLDCM) --- switched reluctance motor (SRM) --- active flux --- stator flux observation --- super-twisting sliding-mode stator flux observer (STSMFO) --- deep-bar effect --- mathematical model --- estimation --- motor drives --- direct torque control (DTC) --- permanent magnet synchronous motor (PMSM) --- maximum torque per ampere (MTPA) operation --- DTC with space-vector modulation (DTC-SVM) --- AFPMSM --- analytical algorithm --- vibration noise --- temperature field analysis --- SynRM --- irreversible demagnetization --- PMa-SynRM --- flux intensifying --- deadbeat current control --- PMSM servo motor drives --- auto tuning --- parameter identification --- periodic controller --- surface permanent magnet synchronous motor --- fault-tolerant system --- multi-channel --- quad-channel operation (QCO) --- triple-channel operation (TCO) --- dual-channel operation (DCO) --- single-channel operation (SCO) --- permanent magnet brushless direct current motor --- BLDCM --- double Fourier analysis --- current spectrum decomposition --- eddy current loss --- permanent magnet machine design --- cogging torque --- permanent magnet machine --- uneven magnets --- IPMSM --- uncertainty and disturbance estimator --- flux-weakening control --- double-cage induction motor --- improvement of motor reliability --- cage winding constructions --- direct start-up --- coupled electromagnetic-thermal model --- outer rotor inductor --- electric vehicle --- high-efficiency --- eco-friendly --- automation --- finite element analysis --- PMSM --- DOE --- optimization --- metamodeling --- adaptive robust control --- energy feedback --- particle swarm optimization --- torque optimal distribution method --- multiphase electric drives --- six-phase machines --- finite control set model predictive control --- predictive current control --- predictive torque control --- high frequency square-wave voltage --- interior permanent-magnet synchronous motor (IPMSM) --- magnetic polarity detection --- rotor position estimation --- characteristics analysis --- fault detection --- stator fault --- rotor fault --- torque estimation --- finite control set mode predictive control --- duty cycle --- maximum torque per ampere --- permanent magnet synchronous motor --- acoustics --- boundary element method --- electric machines --- magneto-mechanics --- modeling --- noise --- vibro-acoustics --- efficiency --- line-start synchronous reluctance motor --- permanent magnet --- power factor --- multiphase --- induction --- motor --- space harmonics --- time harmonics --- injection --- high-speed permanent synchronous motor --- magnetic field characteristic --- iron loss --- stator structure --- online parameters estimation --- permanent magnet synchronous machines --- synchronous reluctance machines --- high frequency signal injection --- CMV --- modulation techniques --- PWM --- railway traction drives --- induction motor drives --- high-speed drives --- overmodulation and six-step operation --- electrical motors --- sot filling factor --- optimization algorithm --- windings --- magnetic wire --- filling factor optimization --- electric drive --- transmission shaft --- electric transmission line --- electrical and mechanical similarities --- kinematic structure --- equivalent circuit --- mathematical modelling --- failure --- detection --- diagnosis --- BLDC --- brushless --- systematic review --- rotor position --- BLDC motor --- sensor misalignment --- sizing methodology --- electrical machines --- thermal model --- electromagnetic model --- switched reluctance motor --- torque sharing functions --- firing angle modulation --- autonomous systems --- brushless synchronous generator --- electric power generation --- high speed generator --- high resistance connection --- fault-detection --- fault-tolerant control --- six-phase permanent magnet synchronous machines --- field-oriented control


Book
Advances in Rotating Electric Machines
Author:
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

Loading...
Export citation

Choose an application

Bookmark

Abstract

It is difficult to imagine a modern society without rotating electric machines. Their use has been increasing not only in the traditional fields of application but also in more contemporary fields, including renewable energy conversion systems, electric aircraft, aerospace, electric vehicles, unmanned propulsion systems, robotics, etc. This has contributed to advances in the materials, design methodologies, modeling tools, and manufacturing processes of current electric machines, which are characterized by high compactness, low weight, high power density, high torque density, and high reliability. On the other hand, the growing use of electric machines and drives in more critical applications has pushed forward the research in the area of condition monitoring and fault tolerance, leading to the development of more reliable diagnostic techniques and more fault-tolerant machines. This book presents and disseminates the most recent advances related to the theory, design, modeling, application, control, and condition monitoring of all types of rotating electric machines.

Keywords

History of engineering & technology --- core saturation --- cross-coupling inductance --- wound synchronous machines (WSM) --- signal injection --- position sensorless --- high-frequency model --- hybrid permanent magnet --- interior permanent magnet (IPM) machine --- magnet-axis-shifted --- reluctance torque --- Sensorless --- induction motors --- H_infinity --- drives --- vector control --- experimental implementation --- direct torque control --- duty cycle control --- harmonic currents --- six-phase induction motor --- torque ripple --- interior permanent magnet synchronous motor (IPMSM) --- sensorless control --- adaptive algorithm --- super-twisting sliding mode observer (STO) --- phase-locked loop (PLL) --- permanent-magnet vernier machine --- in-wheel direct-drive --- outer rotor --- overhang --- soft magnetic composite --- reaction sphere --- spherical motor --- structural design --- torque density optimization --- support vector machines --- finite element method --- induction motor --- smart-sensor --- stray flux --- time-frequency transforms --- wavelet entropy --- harmonic modeling method --- magnetic-geared machine --- hybrid electric vehicle --- magnetic field --- electromagnetic performance --- analytical modeling --- brushless DC motor --- commutation torque ripple --- back electromotive force --- multiphase machines --- fault-tolerance --- dual-channel --- brushless direct current motor with permanent magnet (BLDCM) --- switched reluctance motor (SRM) --- active flux --- stator flux observation --- super-twisting sliding-mode stator flux observer (STSMFO) --- deep-bar effect --- mathematical model --- estimation --- motor drives --- direct torque control (DTC) --- permanent magnet synchronous motor (PMSM) --- maximum torque per ampere (MTPA) operation --- DTC with space-vector modulation (DTC-SVM) --- AFPMSM --- analytical algorithm --- vibration noise --- temperature field analysis --- SynRM --- irreversible demagnetization --- PMa-SynRM --- flux intensifying --- deadbeat current control --- PMSM servo motor drives --- auto tuning --- parameter identification --- periodic controller --- surface permanent magnet synchronous motor --- fault-tolerant system --- multi-channel --- quad-channel operation (QCO) --- triple-channel operation (TCO) --- dual-channel operation (DCO) --- single-channel operation (SCO) --- permanent magnet brushless direct current motor --- BLDCM --- double Fourier analysis --- current spectrum decomposition --- eddy current loss --- permanent magnet machine design --- cogging torque --- permanent magnet machine --- uneven magnets --- IPMSM --- uncertainty and disturbance estimator --- flux-weakening control --- double-cage induction motor --- improvement of motor reliability --- cage winding constructions --- direct start-up --- coupled electromagnetic-thermal model --- outer rotor inductor --- electric vehicle --- high-efficiency --- eco-friendly --- automation --- finite element analysis --- PMSM --- DOE --- optimization --- metamodeling --- adaptive robust control --- energy feedback --- particle swarm optimization --- torque optimal distribution method --- multiphase electric drives --- six-phase machines --- finite control set model predictive control --- predictive current control --- predictive torque control --- high frequency square-wave voltage --- interior permanent-magnet synchronous motor (IPMSM) --- magnetic polarity detection --- rotor position estimation --- characteristics analysis --- fault detection --- stator fault --- rotor fault --- torque estimation --- finite control set mode predictive control --- duty cycle --- maximum torque per ampere --- permanent magnet synchronous motor --- acoustics --- boundary element method --- electric machines --- magneto-mechanics --- modeling --- noise --- vibro-acoustics --- efficiency --- line-start synchronous reluctance motor --- permanent magnet --- power factor --- multiphase --- induction --- motor --- space harmonics --- time harmonics --- injection --- high-speed permanent synchronous motor --- magnetic field characteristic --- iron loss --- stator structure --- online parameters estimation --- permanent magnet synchronous machines --- synchronous reluctance machines --- high frequency signal injection --- CMV --- modulation techniques --- PWM --- railway traction drives --- induction motor drives --- high-speed drives --- overmodulation and six-step operation --- electrical motors --- sot filling factor --- optimization algorithm --- windings --- magnetic wire --- filling factor optimization --- electric drive --- transmission shaft --- electric transmission line --- electrical and mechanical similarities --- kinematic structure --- equivalent circuit --- mathematical modelling --- failure --- detection --- diagnosis --- BLDC --- brushless --- systematic review --- rotor position --- BLDC motor --- sensor misalignment --- sizing methodology --- electrical machines --- thermal model --- electromagnetic model --- switched reluctance motor --- torque sharing functions --- firing angle modulation --- autonomous systems --- brushless synchronous generator --- electric power generation --- high speed generator --- high resistance connection --- fault-detection --- fault-tolerant control --- six-phase permanent magnet synchronous machines --- field-oriented control

Listing 1 - 10 of 13 << page
of 2
>>
Sort by