Rotor and motor comprising same
US11799336B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2020 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | Feb 7, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2211/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An embodiment presents a motor comprising: a shaft; a rotor to which the shaft is coupled; and a stator which is disposed at the exterior of the rotor, wherein: the stator comprises a stator core and a coil which is wound around the stator core; the stator core comprises a yoke, a tooth which protrudes from the yoke, and a first groove and a second groove which are formed on the inner surface of the tooth; and distances from the center of the circumferential direction of the tooth to the first groove and the second groove are different from each other. Accordingly, the motor can reduce cogging torque through a design for the grooves disposed to be asymmetrical with reference to the center of the tooth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.