Multiple coils fluorescent lamp ballast
OwnerEng Siang Kohinventor
Life of this patent
Estimating the term…
Abstract
A ballast choke coil constructed with more than two winding coils assembled on laminate cores (LC) being held together firmly by a bracket (M1) in the manner of simulating the toroidal structure created more space for increasing the number of winding turn of the coil or alternatively allow for increase of wire size. Total number of winding turns that is needed to achieve the required inductance is divided to several coils. The new structure utilizes only half of the laminate material for producing a simple ballast choke coil unit that is similar performance to the existing fluorescent lamp ballast choke coil available in the market. Even though two units of coil (WC) are used in the construction of this ballast choke coil, the wire total weight that is used to produce a unit of ballast need not be increased.
Claims19
A fluorescent lighting ballast choke coil device comprising,
- at least a pair of laminated core stacks;
- at least a pair of winding coils;
- said laminated core stacks comprises two or more sets of multi-layers of laminates being inserted into the winding coils to form a complete loop for magnetic flux to flow, all the winding coils are activated simultaneously by inducing magnetic flux in a unidirectional flow,
- wherein the laminated core stacks include a pair of U-U laminated cores, each of the U-U laminated cores has a U-shape and includes legs with an offset leg length, the U-U laminated cores have an orientation defined by an orientation mark including one or more cutting grooves on the laminates, the U-U laminated cores are positioned to form an air gap between one leg of one of the U-U laminated cores and one leg of another of the U-U laminated cores, and the pair of U-U laminated cores forms a complete full loop in a ballast device construction for magnetic flux flow within the laminates.
An assembly comprising,
- a ballast choke coil device comprising:
- at least a pair of laminated core stacks;
- at least a pair of winding coils;
- and
- the laminated core stacks comprise two or more sets of multi-layers of laminates being inserted into the winding coils to form a complete loop for magnetic flux to flow, all the winding coils are activated simultaneously by inducing magnetic flux in a unidirectional flow;
- and
- an assembly housing for the ballast choke coil device, the assembly housing comprising:
- at least a top cover;
- at least a base plate;
- wherein the laminated core stacks include a pair of U-U laminated cores, each of the U-U laminated cores has a U-shape and includes legs with an offset leg length, the U-U laminated cores have an orientation defined an orientation mark including one or more cutting grooves on the laminates, the U-U laminated cores are positioned to create an air gap between one leg of one of the U-U laminated cores and one leg of another of the U-U laminated cores, the pair of U-U laminated cores forms a complete full loop in a ballast device construction for magnetic flux flow within the laminates, and
- wherein said top cover includes flanges to hold the laminated core stacks.
A fluorescent lighting ballast choke coil device comprising,
- at least a pair of laminated core stacks;
- at least a pair of winding coils;
- and
- the laminated core stacks comprise two or more sets of multi-layers of laminates being inserted into the winding coils to form a complete loop for magnetic flux to flow, all the winding coils are activated simultaneously by inducing magnetic flux in a unidirectional flow,
- wherein the winding coils with equal number of winding coils and laminate legs, have coil terminals interconnected together in a serial connection or a parallel connection such that all the winding coils ultimately act as a single winding coil as a whole when an electric current is passing through the winding coils at a particular point in time in a unit of the ballast choke coil device, and thus all the winding coils create a single direction of magnetic flux flow in laminate loops, and
- wherein the parallel connection is achieved by interconnecting alternate link wires between the winding coils and joining up a start wire of a first winding coil to a link wire between a second winding coil and a third winding coil and a link wire between a fourth winding coil and a fifth winding coil to form a single terminal connection, whereas a link wire between the first winding coil and the second winding coil and a link wire between the third winding coil and the fourth winding coil are joined up to form a second single terminal connection.
Dependencies are inferred from the claim text.