In order to replace rare-earth magnets five different machine topologies are considered, designed and studied in detail. With a synchronous reluctance machine (SRM) a machine without magnets is included in this comparison. The improvement by the insertion of cheap ferrite magnets in a SRM is studied by designing two different types of a permanent magnet assisted synchronous reluctance machine (PMASRM). With this approach torque density and power factor can be significantly increased. As an alternative a spoke-type PMSM with ferrite magnets and a Vernier machine containing a Halbach ferrite cylinder are designed and studied. Despite all optimizations and improvements in design, electrical machines without rare earth magnets lead to greater weight and ultimately to a greater moment of inertia. Therefore the reduction of the moment of inertia is also considered in this comparison.
Topology comparison of ferrite magnet synchronous machines with consideration of low inertia
2016-04-01
1974229 byte
Conference paper
Electronic Resource
English
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