Multifunction magnetic device with multiple cores and coils
US9295145B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2014 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Nov 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic device includes first and second magnetic cores defining first, second, and middle legs extending between first and second back walls, an air gap defined in the middle leg. First, second, and middle legs, and first and second back walls have a substantially equal width. A first winding is located on the first leg, a second winding located on the second leg, and a third winding located on the middle leg. The magnetic device can be part of an electronic ballast circuit including an AC power source, a positive AC rail, a negative AC rail, a resonant capacitor coupled between the positive and negative AC rails, multiple positive and negative lamp terminals configured to couple to respective gas discharge lamps, and windings on a magnetic device coupled between the positive AC rail and respective positive lamp terminals. The third winding is coupled between AC power source and positive AC rail to define a resonant inductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.