Electric motors and generators with high efficiency demands are used in the heavy-duty applications, such as industry, automotive, motorsport and space exploration. In these motors it is desirable to reduce heat loss to the lowest possible level. Permanent magnets can play a major part in losses generated by the presence of eddy currents. Eddy currents can be efficiently reduced in permanent magnets by lamination, sometimes also referred to as segmentation. This technology splits the permanent magnet into smaller, electrically isolated parts. Various magnet shapes can be laminated to produce various widths of the partial segments. Common magnetic materials for lamination are NdFeB and SmCo.
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