Amorphous metal ballasts and reactors
US4288773A · kind A · utility
1Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1978 |
| Grant date | Sep 8, 1981 |
| Priority date | — |
| Expiry date | Dec 6, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F38/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp ballast has a pair of adjacent gapped "O" magnetic cores made of nested, almost complete loops of amorphous metal strip with the gaps in the loops shaped and arranged under the secondary coil to simulate any type of restricted cross section for shaping the lamp current. A long slender reactor has a similar configuration in which the gaps are staggered; a different embodiment has a long central core of compressed amorphous metal flake and a helical overwrap of ribbon. An alloy of iron, boron, and silicon with a high B.sub.r /B.sub.s ratio is preferred for these inductive devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.