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Interior permanent magnet synchronous machines result to be a valid motor topology in case of both high efficiency and high flux-weakening range. These interesting peculiarities can be profitably achieved adopting a salient rotor structure. However, the design of an anisotropic rotor equipped with a multi flux-barrier structure is a very challenging task due to two conflicting requirements: (i) torque...
Among the Permanent Magnet (PM) machines, the Interior PM (IPM) machine is proposed, despite of a strong non linear behaviour and a complex design, as a good candidate thanks to its interesting peculiarities, i.e., higher torque in flux-weakening operation, higher fault-tolerance, and ability to adopt low cost PMs. A second trend in designing PM machines concerns the adoption of fractional-slot (FS)...
The anisotropic interior permanent magnet (IPM) synchronous machine is characterized by two torque components: the PM torque and the reluctance torque. The aim of this paper is to investigate the torque components of such a machine. Both integral- and fractional-slot windings are analyzed. To this aim different machine geometries, e.g slot and pole combinations, are considered. The impact of stator...
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