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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.
Interior permanent magnet motors (IPMMs) are increasingly popular in many applications for all power ranges due to their high torque density, high efficiency and wide operating range [1]. In particular, the spoke-type IPMM has relatively high torque density benefiting from the permanent magnet (PM) flux concentration. However, it has drawbacks such as a serious distortion of airgap flux density distribution...
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 permanent magnet (PM) machines with high torque density and high efficiency are becoming more and more attractive due to the environmental and energy considerations [1]. Notwithstanding the three-phase PM machines are most commonly employed in various industrial and domestic applications benefiting from their well-known high performance, two-phase...
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...
A fixed laser beam heat source was used to re-melt Zr-based crystalline and amorphous alloys. Four hardness regions are found in the amorphous sample along the radial direction of the spot treated by laser beam, whereas two hardness regions are found in the crystalline sample. Results indicate that the hardness of the crystalline phase is lower than that of the amorphous phase. The hardness of the...
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