Self-supporting rotor coil for dc-machine
US4543507A · kind A · utility
4Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1981 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Jul 1, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K3/30
- 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, the wire having a conductive core, an insulating layer surrounding that core and an outer layer comprising a supporting material capable of being softened and subsequently solidified to make the coil self-supporting. The outer layer of the wire is at least in part electrically conductive in order to reduce the production of sparks in the commutator of the dc-machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.