Electric machine
US9461524B2 · kind B2 · utility
0Cited by
1References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | Jul 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K9/197
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electric machine supplied with air for cooling purposes. The air is heated during operation of the electric machine and is removed in the form of exhaust air. The electric machine is equipped with a fan wheel (70) which is coupled to a rotor of the electric machine. To improve and to simplify the operation of the electric machine, the fan wheel (70) is designed as a precise steel part with a sensor device (71) for detecting a rotational speed of the fan wheel (50; 70) and thereby detecting a rotational speed of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.