Electromagnetic inductor for generating a helical field
US4321958A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Jan 16, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K44/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic inductor for generating a helically moving magnetic field includes a first magnetic circuit having an annular core with radially inwardly projecting teeth and a winding for generating a rotating magnetic field, and a second magnetic circuit formed by foliated bars and a second winding comprising an axial series of circular coils for generating an axially moving field. The two fields combine to generate a field with helical movement. At least some consecutive teeth of the core are hollowed to provide axial grooves in which the foliated bars are disposed. The coils of the second winding are cylindrical and set inside the cylindrical volume defined by the teeth. The inductor is particularly adapted for the electromagnetic rabbling of a billet in a continuous casting process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.