Coil device
US5210514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Sep 30, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/346
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coil device includes two magnetic cores each having a U-shape in section forming a closed magnetic path therein with their legs being opposed to each other and having a gap in such path, and a coil wound so as to cover the gap. In this structure, the mutually opposed portions of the magnetic cores in the region to form the gap are so shaped that the cross-sectional area of the fore end becomes smaller than that of the base end, thereby preventing concentration of any leakage magnetic flux on the gap portions while averting abnormal generation of heat in the coil to consequently eliminate harmful influence of noise on peripheral apparatus or components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.