Invention Grant
- Patent Title: Rotor having longitudinal recesses in outer surface between V-slot poles
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Application No.: US16240397Application Date: 2019-01-04
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Publication No.: US10916982B2Publication Date: 2021-02-09
- Inventor: Keith I. Hoemann , Lunjie Lu , Michael W. Major
- Applicant: Nidec Motor Corporation
- Applicant Address: US MO St. Louis
- Assignee: Nidec Motor Corporation
- Current Assignee: Nidec Motor Corporation
- Current Assignee Address: US MO St. Louis
- Agency: Hovey Williams LLP
- Main IPC: H02K21/12
- IPC: H02K21/12 ; H02K1/27 ; H02K1/12 ; H02K21/16

Abstract:
An electric motor includes a stator having a stator surface and a rotor rotatable relative to the stator. The rotor includes a plurality of poles, each of which is defined by a pair of magnets positioned in a V-shaped arrangement having a vertex positioned radially inward. The magnets present a mechanical pole angle of the corresponding pole. The rotor also includes a rotor surface that is opposite the stator surface. The rotor surface includes a plurality of circumferentially-spaced pole segments, each of which spans a respective mechanical pole angle. The rotor also includes a plurality of longitudinally extending recesses, each of which is positioned between adjacent pole segments.
Public/Granted literature
- US20190214863A1 ROTOR HAVING LONGITUDINAL RECESSES IN OUTER SURFACE BETWEEN V-SLOT POLES Public/Granted day:2019-07-11
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