Rotary electric machine and rotor core manufacturing method
AssigneeKabushiki Kaisha Yaskawa Denki
InventorsIsao Nakagawa, Genki Urabe
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Abstract
A rotary electric machine comprises a rotor core and a plurality of permanent magnets embedded in the rotor core along a circumferential direction of the rotor core. The rotor core includes a magnetic pole portion disposed between two permanent magnets adjoining along the circumferential direction of the rotor core. The magnetic pole portion includes a circular arc surface whose cross-sectional shape in a direction perpendicular to an axial direction of the rotor core is a circular arc shape differing in curvature from an outer circumferential circle which is a circumference of a maximum outer diameter portion of the rotor core.
Claims12
A rotary electric machine, comprising:
- a rotor core;
- and
- a plurality of permanent magnets embedded in the rotor core along a circumferential direction of the rotor core,
- wherein the rotor core includes a plurality of magnetic pole portions, each of the magnetic pole portions being disposed between two permanent magnets adjoining along the circumferential direction of the rotor core, and
- the magnetic pole portion includes a circular arc surface whose cross-sectional shape in a direction perpendicular to an axial direction of the rotor core is a circular arc shape differing in curvature from an outer circumferential circle which is a circumference of a maximum outer diameter portion of the rotor core, and the magnetic pole portion is configured to inscribe the outer circumferential circle in a center position of the circular arc surface, and
- the rotor core further includes a plurality of projection portions, each of the projection portions being positioned between two adjacent magnetic pole portions, and at least a portion of an outer-periphery-side surface of the projection portion is positioned on the outer circumferential circle.
Dependencies are inferred from the claim text.