Patent ID: 11955841
Assignee: DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A stator comprising:
a stator core disposed outside a rotor having a rotation axis, wherein the stator core has an inner surface surrounding the rotor around the rotation axis;
a plurality of coil-wound teeth extending from the inner surface of the stator core towards the rotation axis, wherein a coil is wound around each of the plurality of coil-wound teeth; and
openings formed by sidewalls of the plurality of coil-wound teeth and the inner surface of the stator core and having a cross-sectional area perpendicular to the rotation axis,
wherein the inner surface of the stator core is inclined with respect to the rotation axis, thus the cross-sectional area of the openings changes along a direction of the rotation axis, a thickness of the stator core in a radial direction linearly increases along the direction of the rotation axis, and a distance from the rotation axis to the inner surface of the stator core in the radial direction linearly decreases along the direction of the rotation axis.