Oven for thermo-magnetic treatment of toroidal coils of amorphous ferro-magnetic ribbon material
US4812608A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1988 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Mar 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An oven for thermo-magnetic treatment of toroidal coils of amorphous ferro-magnetic ribbon material whereby to improve the eddy current and hysteresis losses thereof for utilization of such coils in a distribution transformer construction. The oven comprises a housing formed as an annular chamber with thermo insulating material disposed at the interior of the chamber. A wire coil is wound about the annular chamber through the inner central passage thereof whereby to generate a magnetic field about the housing to orient the ferro-magnetic domains in the amorphous ribbon material being heat treated in the chamber. At least one toroidal coil is disposed within the chamber between a pair of heating plates to which controlled heat is applied. Preferably, the chamber is evacuated or an inert gas is provided therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.