Electric motor
US12062970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2020 |
| Grant date | Aug 13, 2024 |
| Priority date | — |
| Expiry date | Oct 14, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor includes a shaft supported rotatably around a rotation axis, a rotor located radially outward from the shaft and rotatable integrally with the shaft, and a stator radially opposing the rotor. At least one of the rotor or the stator includes a ventilation path that is a through hole. The ventilation path has a branched shape. A total length of inner circumferential surface lengths of branched ventilation paths in a cross section perpendicular to a penetration direction of the ventilation path is longer than an inner circumferential surface length of an unbranched ventilation path in the cross section perpendicular to the penetration direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.