Core having superior end face insulation and method of treating core end faces to give insulation coating
US7471182B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 12, 2007 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Jan 12, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 μm, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and/or mixed silicone polymer as an insulation coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.