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US 2018/0019648 A1Published application
Apparatus and method for cogging torque reduction with rotor embedded cylindroid permanent magnets
OwnerShahin Asgari, Seyed Mojtaba Aghamirsaliminventors
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Abstract
A rotor supports embedded cylindroid permanent magnets, extending parallel to the rotor axis, and transversely magnetized with a respective magnetization direction radial to the rotor axis. The rotor is concentric to an inner stator and an outer stator. The embedded cylindroid permanent magnets include an arcuate surface facing the outer stator teeth concurrent with an arcuate surface facing the inner stator teeth.
Claims12
A permanent magnet electric motor, comprising:
- a rotor, extending along a rotor axis, and rotatably supported by a support member for rotation about the rotor axis,
- a plurality of cylindroid permanent magnets, mounted to the rotor at respective positions along a reference circle concentric with the rotor axis, wherein:
- each of the cylindroid permanent magnets extends along an axis parallel to the rotor axis, and
- is transversely magnetized with a respective magnetization direction that is radial to the rotor axis;
- and
- a stator, coupled to the support member, and aligned with the rotor axis.
3 more elements
Dependencies are inferred from the claim text.