Choke coil
US5525951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1993 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jun 22, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0064
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Two coils 3a, 3b are wound over adjacent portions of a first magnetic core having two closed magnetic circuits and a second magnetic core. The winding directions of the two coils are set so that the magnetomotive forces generated by both coils may cancel each other in the second magnetic core. The magnetic fluxes flowing in the first magnetic core decrease the higher harmonics of an input current of the power source circuit, while the magnetic fluxes flowing in the second magnetic core 2 decrease the noise between the line and the ground. That is, the choke coil performs the function of choke coil and the function of noise filter at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.