Integrated magnetic inductor having series and common mode windings
US5319343A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1990 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Aug 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/42
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An integrated magnetic filter inductor having series and common mode windings includes a magnetic core (44) having a first leg (46), a second leg (48), and a third leg (50). The first leg (46) is connected to the second leg (48) with bridging structures (52) and (54). In a similar manner, the third leg (50) is connected to the second leg (48) with bridging structures (56) and (58). A common mode winding (64) is wound about the bridging structure (52) with a given dot orientation. A common mode winding (66) is wound about the other bridging structure (54) with the same dot polarity. Current flowing into the dot terminal of the common mode winding (64) and out of the dot terminal of the common mode winding (66) result in a net zero magnetic flux induced in the magnetic structure (44). A common mode winding (68) is wound about the bridging structure (56) with a predetermined dot polarity. A common mode winding (70) is wound about the other bridging structure (58) with the same dot polarity. Therefore, when current flows into the dot end of one of the windings (68) and (70) and out of the dot end of the other winding, the net flux induced in the magnetic structure (44) is zero. A prima…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.