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Motors using rare earth elements have high efficiency and torque density, but they have the drawback of a high price. Thus, this paper proposes the use of ferrite instead of rare earth elements to increase the torque density and decrease the material cost. This paper discusses models with structures that increase the flux per pole and saliency ratio. Using the finite element method, the models are...
Reduction of permanent magnet materials in electric machines is of interest to many machine manufacturers and designers as cost of rare-earth materials is of increasing concern. The impact of changing a machine design parameter, such as the shape of the magnets, may have consequences such as a reduction in efficiency, or introduce a change in torque quality. In this paper, an efficiency map computation...
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