Ballast for multiple lamps and method of manufacturing the same
AssigneeSang Yong Illumination Co.
InventorHo-Sub SIN
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a ballast for multiple lamps and a method of manufacturing the ballast. A first coil is wound around a bobbin which has a partition formed in the center portion of an inner space thereof. An insulating sheet is stacked on the first coil, and a second coil is wound around the insulating sheet. Two paired core elements are vertically coupled to each other to form each core. Ends of the core elements disposed outside the bobbin are connected, and ends of the core elements disposed inside the bobbin are spaced apart from each other by the thickness of the bobbin partition, to form a path for magnetic flux.
Claims8
A ballast for multiple lamps, comprising:
- a rectangular cylindrical bobbin provided with a partition formed in a center portion of an inner space thereof;
- a first coil wound around an outer surface of the bobbin to enclose the outer surface and configured to control current flowing through a first discharge lamp;
- an insulating sheet stacked on the first coil to enclose the first coil;
- a second coil wound around the insulating sheet to enclose the insulating sheet and configured to control current flowing through a second discharge lamp;
- and
- first and second cores, each configured to include two paired core elements, which have ∩- and ∪-shaped vertical sections and are vertically coupled to each other on both sides of the bobbin, wherein ends of the core elements disposed outside the bobbin are connected to each other, and ends of the core elements disposed inside the bobbin are spaced apart from each other by an interval corresponding to the thickness of the partition of the bobbin to form a path for magnetic flux.
A method of manufacturing a ballast for multiple lamps, comprising:
- forming a rectangular cylindrical bobbin provided with a partition formed in a center portion of an inner space thereof;
- winding a first coil around an outer surface of the bobbin to enclose the outer surface;
- stacking an insulating sheet on the first coil to enclose the first coil;
- winding a second coil around the insulating sheet to enclose the insulating sheet;
- forming a first core and a second core, each including paired core elements having ∩- and ∪-shaped vertical sections;
- and
- vertically coupling the paired ∩- and ∪-shaped core elements of the first core to each other and vertically coupling the paired ∩- and ∪-shaped core elements of the second core to each other on both sides of the bobbin.
Dependencies are inferred from the claim text.