Electric constant speed/variable speed drive/generator assembly
US4488053A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1981 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Feb 17, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention is an "electric" constant speed/variable speed drive/generator assembly (10), which finds use in aircraft, and in particular, in "all-electric" aircraft. The assembly (10) includes a planetary differential (20) whose output is controlled by a "make-up" induction motor (12). The induction motor (12) includes a squirrel-cage rotor (14) which is rotatable about a rotor-shaped stator (16). The assembly also includes a primary power generator (30) which includes a permanent magnet rotor (18) and an output winding (22). The rotor (18) is co-axial with and rotatable about, the outside of the rotor (14). The outer rotor (18) is driven by the planetary differential (20) in such a manner that the planet-carrier (24) is driven by the aircraft's engine, the ring-gear (26) drives the generator (30), and the sun-gear (32) is connected to the induction motor (12). Constant speed operation of the device is effective when the band-brake (34) is "off" and the induction motor (12) rotates at a speed, and in a direction, to compensate for the in-flight variations of the engine input-speeds to the planetary differential (20). When the band-brake (34) is "on," the sun-gear (32) is locked a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.