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Power converters have progressively become the most efficient and attractive solution in recent decades in many industrial sectors, ranging from electric mobility, aerospace applications to attain better electric aircraft concepts, vast renewable energy resource integration in the transmission and distribution grid, the design of smart and efficient energy management systems, the usage of energy storage systems, and the achievement of smart grid paradigm development, among others.In order to achieve efficient solutions in this wide energy scenario, over the past few decades, considerable attention has been paid by the academia and industry in order to develop new methods to achieve power systems with maximum harmonic performance aiming for two main targets. On the one hand, the high-performance harmonic performance of power systems would lead to improvements in their power density, size and weight. This becomes critical in applications such as aerospace or electric mobility, where the power converters are on-board systems. On the other hand, current standards are becoming more and more strict in order to reduce the EMI and EMC noise, as well as meeting minimum power quality requirements (i.e., grid code standards for grid-tied power systems).

Technology: general issues --- Energy industries & utilities --- multiphase drives --- pulse width modulation --- current harmonics --- effective voltage regulation --- generalized delayed signal cancellation --- harmonic distortion --- power quality --- repetitive controller --- harmonic analysis --- power converters --- pulse-width modulation (PWM) --- frequency-domain model --- voltage-source inverter (VSI) --- closed-loop control --- full electric aircraft (FEA) --- cascaded H-bridge (CHB) --- multi-level inverter --- permanent magnet synchronous motor (PMSM) --- total harmonic distortion (THD) --- pulse-width modulation --- metaheuristic search algorithms --- multiphase drives --- pulse width modulation --- current harmonics --- effective voltage regulation --- generalized delayed signal cancellation --- harmonic distortion --- power quality --- repetitive controller --- harmonic analysis --- power converters --- pulse-width modulation (PWM) --- frequency-domain model --- voltage-source inverter (VSI) --- closed-loop control --- full electric aircraft (FEA) --- cascaded H-bridge (CHB) --- multi-level inverter --- permanent magnet synchronous motor (PMSM) --- total harmonic distortion (THD) --- pulse-width modulation --- metaheuristic search algorithms

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Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the increased use of renewable energy and the electrification of transports. This book contains the successful submissions of fifteen papers to a Special Issue of Energies on the subject area of “Permanent Magnet Synchronous Machines”. The focus is on permanent magnet synchronous machines and the electrical systems they are connected to. The presented work represents a wide range of areas. Studies of control systems, both for permanent magnet synchronous machines and for brushless DC motors, are presented and experimentally verified. Design studies of generators for wind power, wave power and hydro power are presented. Finite element method simulations and analytical design methods are used. The presented studies represent several of the different research fields on permanent magnet machines and electric drives.

MPC --- predictive current control (PCC) --- fault diagnosis --- modeling --- back electromotive force --- finite-element analysis --- sensorless control --- brushless dc motor --- flying start --- periodic timer interrupt --- digital simulation --- torque control --- saturation --- renewable energy --- finite element method --- sensorless motor --- electric propulsion systems --- electric vehicle --- energy efficiency --- sub-fractional slot-concentrated winding --- stability --- design tools --- brushless machine --- permanent magnet synchronous motor (PMSM) --- electrical signature analysis --- Vernier machine --- multiphase machine --- interior permanent magnet synchronous machines --- automotive applications --- pulse width modulation --- current ripples --- PMSM --- wave power --- outer rotor --- electric vehicle (EV) --- power control --- condition monitoring --- energy conversion --- sliding mode observer (SMO) --- field weakening --- small wind turbines --- interior permanent-magnet machines --- permanent-magnet machine --- free-wheeling period --- brushless DC (BLDC) motor --- speed tracking --- current spikes --- flux switching machine --- Brushless DC motors --- magnetic reluctance network --- winding inductance --- parameter perturbation --- DB-DTFC (deadbeat-direct torque and flux control) --- R-C filter --- phase-advanced method --- motor drives --- PMSM (permanent magnet synchronous motor) --- coils --- predictive maintenance --- cogging torque --- finite element analysis --- permanent magnet material --- vector control --- linear generator --- commutation error compensation --- electrical machine design --- permanent magnet synchronous generator --- wind generator --- mathematical model --- permanent magnet synchronous motor --- hybrid electric vehicle (HEV) --- stator --- bulk electric system --- permanent magnet synchronous machine (PMSM) --- synchronous generator

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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.

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

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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.

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

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Electrical machines are one of the most important components of the industrial world. They are at the heart of the new industrial revolution, brought forth by the development of electromobility and renewable energy systems. Electric motors must meet the most stringent requirements of reliability, availability, and high efficiency in order, among other things, to match the useful lifetime of power electronics in complex system applications and compete in the market under ever-increasing pressure to deliver the highest performance criteria. Today, thanks to the application of highly efficient numerical algorithms running on high-performance computers, it is possible to design electric machines and very complex drive systems faster and at a lower cost. At the same time, progress in the field of material science and technology enables the development of increasingly complex motor designs and topologies. The purpose of this Special Issue is to contribute to this development of electric machines. The publication of this collection of scientific articles, dedicated to the topic of electric machine design and application, contributes to the dissemination of the above information among professionals dealing with electrical machines.

Technology: general issues --- History of engineering & technology --- electric AWD tractor --- SOC level --- simulation model --- load measurement system --- driving test --- brushless direct current motor with permanent magnet (BLDCM) --- winding configurations --- star --- delta --- star-delta --- fault states --- open circuit (OC) --- FFT --- neutral-point voltage --- electrical machine --- hydro generator --- faulty synchronization --- finite element method --- field-circuit modeling --- permanent magnet machines --- hybrid excitation --- electric vehicles --- wind power generator --- finite element methods --- variable speed machines --- synchronous generator --- permanent magnets --- demagnetization --- motor control --- switched reluctance motor --- MATLAB --- simulation --- wheel hub motor --- electric drive --- permanent magnet synchronous motor --- electrical machines --- thermal modeling --- preformed coils --- insulation systems --- pre-shaped conductor --- system model --- structural dynamics --- multibody simulation --- transient electrical machine model --- permanent magnet synchronous machine --- induction machine --- dynamic gear forces --- planetary gear --- synchronous condenser --- different materials --- magnetic flux leakage in the end --- eddy current loss --- fluid-solid coupling --- finite element analysis (FEA) --- interior PM synchronous motor --- surface PM synchronous motor --- traction applications --- finite element analysis --- flux switching machine --- flux bridge --- magnetic flux leakage --- variable flux machine --- axial flux generator --- spatial harmonic interaction --- harmonic balance method --- turbo-generator --- eddy current losses --- data driven --- support vector regression --- multi-layer perceptron --- vane pump --- electric motor --- integrated motor-pump assembly (IMPA) --- balanced vane pump --- fluid power drives --- brushless DC electric motor --- permanent magnet machine --- measurements --- high-speed motor --- electromagnetic analysis --- mechanical analysis --- thermal analysis --- electromechanical convertor --- drive system component --- electromagnetic calculation --- MR fluids --- MR multi-disc clutch --- clutch design --- electric train --- hybrid excited linear flux switching machine --- rope-less elevator --- electric AWD tractor --- SOC level --- simulation model --- load measurement system --- driving test --- brushless direct current motor with permanent magnet (BLDCM) --- winding configurations --- star --- delta --- star-delta --- fault states --- open circuit (OC) --- FFT --- neutral-point voltage --- electrical machine --- hydro generator --- faulty synchronization --- finite element method --- field-circuit modeling --- permanent magnet machines --- hybrid excitation --- electric vehicles --- wind power generator --- finite element methods --- variable speed machines --- synchronous generator --- permanent magnets --- demagnetization --- motor control --- switched reluctance motor --- MATLAB --- simulation --- wheel hub motor --- electric drive --- permanent magnet synchronous motor --- electrical machines --- thermal modeling --- preformed coils --- insulation systems --- pre-shaped conductor --- system model --- structural dynamics --- multibody simulation --- transient electrical machine model --- permanent magnet synchronous machine --- induction machine --- dynamic gear forces --- planetary gear --- synchronous condenser --- different materials --- magnetic flux leakage in the end --- eddy current loss --- fluid-solid coupling --- finite element analysis (FEA) --- interior PM synchronous motor --- surface PM synchronous motor --- traction applications --- finite element analysis --- flux switching machine --- flux bridge --- magnetic flux leakage --- variable flux machine --- axial flux generator --- spatial harmonic interaction --- harmonic balance method --- turbo-generator --- eddy current losses --- data driven --- support vector regression --- multi-layer perceptron --- vane pump --- electric motor --- integrated motor-pump assembly (IMPA) --- balanced vane pump --- fluid power drives --- brushless DC electric motor --- permanent magnet machine --- measurements --- high-speed motor --- electromagnetic analysis --- mechanical analysis --- thermal analysis --- electromechanical convertor --- drive system component --- electromagnetic calculation --- MR fluids --- MR multi-disc clutch --- clutch design --- electric train --- hybrid excited linear flux switching machine --- rope-less elevator