Method of making self-supporting rotor coil dc-machine
US4291457A · kind A · utility
Inventor
Key dates
| Filing date | Aug 2, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Aug 2, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cylindrical, ironless, self-supporting rotor coil for use in an electrical dc-machine is disclosed. The coil is formed by at least one layer of wire in which the wire is at least in part placed in an oblique direction with respect to the generatrixes of the cylindrical rotor surface. The wire comprises a central core, an insulating layer and an outer layer of a supporting material capable of being softened during or after winding and subsequently solidified. The coil is made with a final winding pitch such that the insulating layers of adjacent wire parts are at least nearly in contact, the supporting material filling the remaining spaces between the insulating layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.