Method and apparatus for manufacturing a preform for a flat coil dynamoelectric device
US4756075A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1987 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Mar 5, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discoidal, flat coil armature for a flat disc motor is formed by winding coils of wire on mutually spaced inner and outer ring structures. The inner ring structure surrounds a commutator body having segments with tangs. Automatic apparatus, including a rotating flier, a preform clamp and rotator, and a wire guide assembly, winds the coils and makes coil terminal connections to the commutator tangs before, during, and after the winding of the coils. The coils are tightly wound on the ring structures so that they form, along with the ring structures and the commutator body, an armature preform having a self-supporting shape. The parts of the finished preform are bonded together and to an armature shaft by a matrix of resinous material. When completed, the armature includes a thin-walled, active coil section having substantially radially extending active coil sides encapsulated in plastic and located between the inner and the outer ring structures and also includes inner and outer coil end turns that are also encapsulated in plastic and that extend substantially circumferentially along the inner and the outer ring structures, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.