Rotor of an electric machine
US11955846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2019 |
| Grant date | Apr 9, 2024 |
| Priority date | — |
| Expiry date | Dec 28, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor (1) of an electrical machine is already known, comprising a rotor body (3) which can be rotated about a rotor axis (2) and comprising several cooling ducts (5) which have a cooling duct opening (8.1, 8.2) at each of its ends, wherein one cooling duct opening (8.1) of one of the cooling ducts (5) is arranged radially further outside than the other cooling duct opening (8.2) of the same cooling duct (5). The driving force for generating an airflow through the cooling ducts (5) is generated by a radial offset between a channel of a hollow shaft of the rotor and one of the cooling duct openings of the rotor. In the rotor (1) according to the invention, the driving force for generating the airflow is generated solely in the cooling duct (5) in question of the rotor (1). According to the invention: the first cover element (10) covers the radially innermost partial cross-section of the cooling duct opening (8.1) in question with an edge section which is radially outward with respect to the rotor axis (2) and in each case leaves a radially outermost partial cross-section of the same cooling duct opening (8.1) uncovered as a cooling duct outlet (8.1); the other cooling duct opening …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.