Counter rotating ducted fan having a permanent magnet drive
US7032859B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2004 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Dec 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A counter rotating ducted fan having a permanent magnet drive. comprising a ducted housing having an iron core stator and a pair of counter rotating propeller blades rotationally mounted on a propeller shaft positioned axially within the housing Each of the propeller blades includes a plurality of individual propeller blades of an even number. Permanent magnets are mounted in permanent magnet insertion holes located at the tip of each of the individual propeller blades. When excited by an electrical current a pair of excitation windings mounted within the iron core stator control the rotational speed and direction of the pair of counter rotating propeller blades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.