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Recently, flux-switching permanent-magnet (PM) (FSPM) machines have received considerable attentions recently in high reliability applications, due to its high power density, robust structure, and essential sinusoidal back-electromotive-force waveforms [1].
Salient pole wound field synchronous machines (WFSMs) are widely used for various electric power generation, such as hydro and wind generators [1], because there is free of permanent magnet and it can be directly controlled by the DC winding.
Owing to employing the magnetic gearing effect, linear magnetic-field modulated (LMFM) motors incorporate the merits of high thrust force and low cost resulting from the simple stator structure [1].
Transferring motor loads from one bus to another bus, due to a source disconnection from a main–tie–main arrangement, is not a trivial action. The transfer is dependent on detection of breakers' status, switch positions, and accurate measurements of line and bus voltages. The mechanism of transferring loads from one bus to the other imposes a number of requirements for the relay controlling the closing...
The use of small ultra-high speed rotating machines has been an area of interest for emerging applications such as machining spindles, dental drills, compressors and turbochargers, as well as portable power generation and energy storage systems [1]. Such machines are being designed to operate at speeds reaching as much as one-million revolutions per minute (rpm) [2]. At such a high speed, a slotless...
In recent years, flux switching permanent magnet machines (FSPMMs) have been comprehensively investigated for various applications [1]-[2]. In particular, the axial field FSPMMs are attracting much attentions due to the incorporation of the advantages of FSPMMs and axial filed permanent magnet (PM) machines, which offer the merits of high torque/power density, high efficiency, compact construction...
Recently, the demand for developing high performance electric machines which are free of rare earth magnets are becoming more and more attractive since the raw materials in the rare earth magnets suffer the challenge of increased price and limited supply [1]. In particular, the ferrite-assisted synchronous reluctance machines (FA SynRMs) are regarded as one competitive candidate which incorporate...
Interior permanent-magnet (PM) motor has been applied in commercial hybrid electric vehicles, such as Prius 2004 and Prius 2010 [1]. Many available candidates for Prius 2004 have been proposed [2, 3], which meet the requirements of torque density and power density, but they suffer from speed regulation capability. The purpose of this paper is to propose a novel hybrid rotor PM (HRPM) motor. The key...
In recent years, coaxial magnetic gears (CMGs) are particularly attractive for applications desiring high torque density, such as electric vehicles and wind generators [1]. They can offer several advantages like low acoustic noise, maintenance free, and inherent overload protection in comparison with conventional mechanical gears. However, because of the modulation effect by the stationary ring, the...
Vernier permanent-magnet (PM) motors which exploit magnetic gear effects to modulate the magnetic fields are capable of producing high torque at a relatively low speed [1]-[3]. Due to its structural compactness, high torque density, high efficiency, these motors are very suitable for direct-drive applications such as electric vehicles. A new kind of vernier PM motor has been presented in [4], which...
Permanent magnet (PM) machines possess the merits of high torque density and high efficiency which is very suitable for some applications such as electric vehicles (EVs) [1]-[4]. Over the years, the surface PM and interior PM types, have been extensively studied and developed. The 2004 prius interior PM machine with the advantages of high torque density and wide speed range has been built and applied...
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