KR100631124B1 - Inverter transformer - Google Patents

Abstract

An inverter transformer is provided to obtain the electrical insulation between a primary bobbin and a secondary bobbin by forming an insulated slit on a transformer cap. A primary bobbin(401) has plural insulated slits(407), and a primary coil(405) is wound around the insulated slits. A secondary bobbin(402) has plural insulated slits, and a secondary coil(406) is wound around the insulated slits. A transformer cap(403) has a first bobbin engaging portion(411) and two second bobbin engaging portions(412a,412b). Two isolated slits(413a,413b) are formed between the first and second bobbin engaging portions. A pair of cores are inserted into holes formed on the primary and secondary bobbins.

Description

Inverter Transformer {INVERTER TRANSFORMER}

1 is an exploded perspective view of an inverter transformer according to the prior art

2 is a plan view of the inverter transformer according to the prior art

3 is a diagram illustrating a creepage distance between a core, a first coil winding, and a second coil winding according to the related art;

Figure 4a is an exploded perspective view of the inverter transformer according to the present invention

Figure 4b is a perspective view of the combination of the inverter transformer according to the present invention

5 shows the creepage distance between the core and the wound primary bobbin;

6a to 6d show the creepage distance between the core and the wound secondary bobbin

<Description of Major Symbols in Drawing>

401: primary bobbin 402: secondary bobbin

403: transcap 404: core

405: primary coil 406: secondary coil

407: insulation slit 407a: edge slit of the primary bobbin

407b: edge slit of secondary bobbin 408a ~ 408d: first, second, third and fourth assembling groove

409a ~ 409h: 5th ~ 12th assembly groove 410: Pin

411: first bobbin coupling portion 412a, 412b: second bobbin coupling portion

413a, 413b: 1st, 2nd isolation slit 414a-414d: 1st, 2nd, 3rd, 4th assembly protrusion

415a ~ 415h: 5th-12th assembly protrusion

416a ~ 416d: 1st, 2nd, 3rd, 4th insulation spacing

417: core through hole 418, 419: first and second coil heat dissipation holes

420: insertion hole formed in the 1st and 2nd bobbin

a1: width of the first and third assembling protrusions a2: width of the first and third assembling protrusions

b1: width of the first and second insulating spaces b2: width of the first and second insulating spaceslit

c: thickness of the first, second, third, and fourth insulating spacing

d: width between the edge slit and both sides of the primary and secondary bobbins

The present invention relates to an inverter transformer, which forms an isolation slit and an insulation separation slit capable of isolating primary and secondary bobbins in a transformer cap, and uses a core having the same left and right sides, one primary bobbin and two two By using the primary bobbin, not only can the electrical insulation between the primary and secondary bobbins be more reliably achieved, but also the transformer efficiency and the heat generated by the transformer can be reduced, the core yield is increased, and the core is incorrect. The present invention relates to an inverter transformer that can be improved in workability of the transformer manufacturing process by preventing the coupling to a position.

With the development of display technology, monitors, which are liquid crystal displays (LCDs), are increasingly used in computer or other display devices. Compared with CRT monitors, the LCD monitors have the advantage of slimmer longitudinal sections and reduced flicker. The LCD monitor has a fluorescent lamp driven at high pressure for a backlight system requiring a back-light module.

On the other hand, an inverter with a drive circuit is used to drive the fluorescent lamp, which has a high voltage transformer, which is called an inverter transformer.

The inverter transformer generates a high AC output voltage with a low AC input voltage, and serves to supply a voltage to a lamp constituting the LCD panel.

The inverter transformer is called a resonant transformer because the inverter transformer can raise the transformer secondary voltage by more than the first and second turn ratios by resonating with the capacitance of the lamp and the panel at the frequency applied to the transformer primary side.

Conventional inverter (resonant) transformers drive one transformer to supply power to one lamp, but use an external electrode fluorescent lamp (EEFL) or a cold cathode fluorescent lamp (CCFL). In the case of driving in parallel, several transformers are driven to supply power to several lamps. .

1 shows an exploded perspective view showing an inverter transformer according to the prior art, FIG. 2 shows a plan view of the inverter transformer according to the prior art, and FIG. 3 shows the core 103 and the first coil winding 101a according to the prior art. ) And the creepage distance between the second coil winding 101b. As shown in FIG. 1, the inverter transformer according to the related art includes one bobbin 101 including a first coil winding 101a and a second coil winding 101b on which primary and secondary coils are wound. ), A pair of "E" respectively inserted into the trans cap 102 into which the bobbin 101 is inserted, and the insertion hole 104 formed in the bobbin 101 through both sides of the trans cap 102. The magnetic core 103 is included.

In addition, as shown in FIG. 2, the bobbin 101 includes a second coil winding part (1) positioned at each of the first coil winding part 101a and the first coil winding part 101a located at the center. 101b), and the inverter transformer configured as described above should have a predetermined distance in order to secure the creepage distance required for insulation, which results in a narrow winding area of the coil, and thus the output capacity of the transformer There is a problem that the efficiency of the transformer is lowered to have a limit.

In FIG. 3, the creepage distance is the shortest distance between two conductive portions, and means a distance measured along the surface of the insulation or the portion thereof interposed therebetween. In a conventional inverter transformer, when the distance between the core 103 and the first coil winding 101a and the core 103 and the second coil winding 101b is secured by 1 mm or more, 20 mm or more for insulation. Creepage distance is required. Thus, the core 103 and the first coil winding part (101a) creepage distance _(A ℓ) and a core (103) and the second coil winding creepage distance (ℓ _B) between (101b) between each or more 10㎜ Creepage distances should be secured.

Therefore, in the case of the conventional inverter transformer, as shown in Figs. 1 and 2, in order to secure a creepage distance of 20 mm, a predetermined distance between the first coil winding 101a and the second coil winding 101b. The distance (S) must be kept.

However, in the conventional inverter transformer as described above, since the primary and secondary coils are wound around one bobbin, the primary winding area must be spaced apart to secure the creepage distance required for insulation. There was some wasteful problem.

In addition, as a part of the primary winding area is wasted and the coil cannot be wound around the primary side, the load loss increases, and thus the amount of heat generated on the primary side increases, thereby lowering the conversion efficiency.

In addition, as a part of the primary winding area is wasted and the number of coil turns is reduced, the output capacity of the transformer has a limit, and thus, the efficiency of the transformer is inferior.

Accordingly, the present invention has been made to solve the above problems, and forms an isolation slit and an insulation separation slit capable of isolating the primary and secondary bobbins in the transcap, and use the same core on one side, and one primary bobbin By using two and two secondary bobbins, not only can the electrical insulation between the primary and secondary bobbins be more reliably achieved, but also the transformer efficiency and the heat generated by the transformer can be reduced, and the core production yield is improved. And it is to provide an inverter transformer that can improve the workability of the transformer manufacturing process by preventing the core is coupled to the wrong position.

Inverter transformer according to the present invention for achieving the above object, a plurality of insulating slits are formed, the primary bobbin is wound between the plurality of insulating slits; A plurality of secondary bobbins having a plurality of insulating slits formed thereon and having a secondary coil wound between the plurality of insulating slits; A transcap including one first bobbin coupling portion and two second bobbin coupling portions formed with two isolation slits so that the primary and secondary bobbins are respectively inserted; And a pair of cores respectively penetrating through both sides of the transcap and inserted into insertion holes formed in the primary and secondary bobbins.

Here, the transcap, characterized in that the first bobbin coupling portion is inserted in the center, the second bobbin coupling portion is inserted into both the first bobbin coupling portion.

In addition, the upper portion of the transcap, characterized in that the first and second coil heat dissipation holes for dissipating heat generated in the primary and secondary coils are formed.

In addition, the first bobbin coupling portion of the transcap, characterized in that the first, second, third, fourth assembly protrusions are formed to fix the primary bobbin, and determine the insertion direction of the primary bobbin.

In this case, the first and third assembly protrusions are formed in the first isolation slit of the transcap, and the second and fourth assembly protrusions are formed in the second isolation slit of the transcap.

The first and third assembling protrusions of the transcap protrude from a range of 1.5 mm to 2.0 mm from the first isolation slit, and the second and fourth assembling protrusions of the transcap are 1.5 from the second separating slit. It is characterized by protruding in the range of mm ~ 2.0mm.

In addition, the second bobbin coupling portion of the transcap, characterized in that the fifth to 12 assembling protrusions are formed to fix the secondary bobbin, and determine the insertion direction of the secondary bobbin.

In this case, the fifth and seventh assembling protrusions are formed in the first isolation slit of the transcap, and the sixth and eighth assembling protrusions are formed on a surface facing the first isolation slit of the transcap.

The fifth and seventh assembling protrusions of the transcap are characterized in that they protrude within the range of 1.5 mm to 2.0 mm from the first isolation slit.

In addition, the ninth and eleventh assembling protrusions are formed in the second isolation slit of the transcap, and the tenth and twelfth assembling protrusions are formed on a surface facing the second isolation slit of the transcap.

At this time, the ninth and eleventh assembling protrusions of the transcap are characterized in that protrude within the range of 1.5mm ~ 2.0mm from the second isolation slit.

In addition, the first, second, third, fourth insulating separation slits are formed in the two second bobbin coupling portion to secure the insulating separation distance.

In this case, the first and second insulating spaced slit of the transcap, characterized in that formed on the surface facing the first isolation slit of the transcap.

At this time, the first and second insulating spaced slit of the transcap, characterized in that protruding in the range of 2.5mm ~ 3.5mm from the surface facing the first isolation slit of the transcap.

The third and fourth insulating spacers of the transcap may be formed on a surface facing the isolation slit of the second transcap.

At this time, the third and fourth insulating spaced slit of the transcap, characterized in that protruding within the range of 2.5mm to 3.5mm from the surface facing the second isolation slit of the transcap.

In addition, the thickness of the first, second, third, fourth insulating spaced slit of the transcap is characterized in that in the range of 0.3mm ~ 0.8mm.

In addition, a plurality of pins capable of fixing the wound primary and secondary coils is formed.

The primary and secondary coils may not be wound between two edges of the plurality of insulating slits of the primary and secondary bobbins and both side surfaces of the primary and secondary bobbins.

In this case, the width between the two slits of the edge of the plurality of insulating slits of the primary and secondary bobbins and both side surfaces of the primary and secondary bobbins is in the range of 1.0 mm to 1.2 mm.

In addition, the outer surface of the primary bobbin, characterized in that the first, second, third, and fourth assembling grooves into which the first, second, third, and fourth assembling protrusions are inserted.

And, the two secondary bobbin outer surface, characterized in that the fifth to twelve assembling groove into which the fifth to twelve assembling protrusions are inserted.

The core may be an "E" shaped core.

In addition, the core is characterized in that the core is a combination of the "U" -shaped core forming the outer magnetic path and the "I" shaped core forming the inner magnetic path.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4A is an exploded perspective view illustrating an inverter transformer according to the present invention, and FIG. 4B illustrates a combined perspective view of the inverter transformer according to the present invention.

As shown in FIGS. 4A and 4B, the inverter transformer according to the present invention includes a primary in which a plurality of insulating slits 407 are formed and a primary coil 405 is wound between the plurality of insulating slits 407. Two secondary bobbins 402 and two secondary bobbins 402 in which a bobbin 401 and a plurality of insulating slits 407 are formed and a secondary coil 406 is wound between the plurality of insulating slits 407, and the primary and secondary parts. Transcap including one first bobbin coupling portion 411 and two second bobbin coupling portions 412a and 412b formed with two isolation slits 413a and 413b so that the bobbins 401 and 402 are respectively inserted. 403 and a pair of cores 404 respectively inserted into insertion holes 420 formed in the primary and secondary bobbins through both sides of the transcap 403.

Inverter transformer according to the present invention is composed of one primary bobbin 401 and two secondary bobbin 402 can output two outputs with one transformer, using two transformers in a small area This results in the same effect as reducing the manufacturing cost of the transformer.

Here, the isolation slits 413a and 413b of the transcap 403 are isolated between the primary bobbin 401 and the two secondary bobbins 402a and 402b by separating the primary bobbin 401 and the secondary bobbin ( As the electrical insulation between 402a and 402b is more reliably established, a part of the winding area is wasted because there is no need to secure a certain distance for the insulation of the primary and secondary bobbins 401, 402a and 402b. It can be prevented.

Meanwhile, core through holes 417 are formed at both sides of the trans cap 403 so that the core 404 penetrates, and the primary and secondary coils 405 are formed on the trans cap 403. First and second coil heat dissipation holes 418 and 419 for dissipating heat generated by the first and second 406.

In addition, the first bobbin coupling portion 411 of the transcap 403 is fixed to the primary bobbin 401, the first, second, and third to determine the insertion direction of the primary bobbin 401 , 4 assembly protrusions 414a to 414d are formed, and the first and third assembly protrusions 414a and 414c are formed in the first isolation slit 413a of the transcap 403 and the second and fourth assembly. Projections 414b and 414d are formed in the second isolation slit 413b of the transcap 403.

At this time, the width a1 of the first and third assembling protrusions 414a and 414c in order to secure 1 mm, which is a distance for receiving creepage distance, is the first isolation slit 413a of the transcap 403. When measured in the direction of the second isolation slit 413b of the transcap 403, it is preferably in the range of 1.5mm to 2.0mm. In other words, it is preferable to protrude within the range of 1.5 mm to 2.0 mm from the first isolation slit 413a of the transcap 403. Similarly, it is preferable that the second and fourth assembly protrusions 414b and 414d also protrude within the range of 1.5 mm to 2.0 mm from the second isolation slit 413b of the transcap 403. This is because the primary bobbin 401 may be inserted into the first bobbin coupling part 411 only by securing a width a1 slightly larger than the required separation distance of 1 mm.

In addition, the first and second insulating spaces 416a and 416b of the transcap 403 are formed on a surface of the transcap 403 facing the first isolation slit 413a of the transcap 403. The first isolation slit 413a of the transcap 403 is formed in a direction facing the first isolation slit 413a of the transcap 403.

In this case, the width b1 of the first and second insulating spaced slits 416a and 416b is the first of the transcap 403 in a surface facing the first isolation slit 413a of the transcap 403. When measured in the direction of the isolation slit 413a, it is preferably within the range of 2.5 mm to 3.5 mm. In other words, it is preferable to protrude within a range of 2.5 mm to 3.5 mm from the surface facing the first isolation slit 413a of the transcap 403. This is because the creepage distance necessary for insulation can be ensured only within the above range. When the above range is secured, whether the creepage distance required for insulation is satisfied will be described in the drawings to be described later.

Meanwhile, the two secondary bobbins 402 may be fixed to the second bobbin coupling parts 412a and 412b of the transcap 403, and the insertion direction of the two secondary bobbins 402 may be determined. 5 to 12 assembly protrusions 415a to 415h are formed, and the fifth and seventh assembly protrusions 415a and 415c are formed in the first isolation slit 413a of the transcap 403, and the sixth , 8 assembly protrusions 415b and 415d are formed on a surface facing the first isolation slit 413a of the transcap 403. In addition, the ninth and eleventh assembly protrusions 415e and 415g are formed in the second isolation slit 413b of the transcap, and the tenth and twelfth assembly protrusions 415f and 415h are second isolation of the transcap. It is formed on the surface facing the slit 413b.

At this time, similar to the first bobbin coupling portion 411 of the transcap 403, in order to secure a 1mm, the separation distance for receiving creepage distance, the width of the fifth and seven assembling protrusions (415a, 415c) (a2) ranges from 1.5 mm to 2.0 mm when measured in a plane direction facing the first isolation slit 413a of the transcap 403 at the first isolation slit 413a of the transcap 403. It is desirable to stay within. In other words, it is preferable to protrude within the range of 1.5 mm to 2.0 mm from the first isolation slit 413a of the transcap 403.

Similarly, it is preferable that the ninth and eleventh assembling protrusions 415e and 415g also protrude within the range of 1.5 mm to 2.0 mm from the second isolation slit 413b of the transcap 403.

In addition, the third and fourth insulating spaces 416c and 416d of the transcap 403 are formed on a surface of the transcap 403 facing the second isolation slit 413b of the transcap 403. The second isolation slit 413b of the transcap 403 is formed in a direction facing the second isolation slit 413b of the transcap 403.

In this case, the width b2 of the third and fourth insulating spaced slits 416c and 416d is the second of the transcap 403 in a surface facing the second isolation slit 413b of the transcap 403. When measured in the direction of the isolation slit 413b, it is preferably within the range of 2.5 mm to 3.5 mm. In other words, it is preferable to protrude within the range of 2.5 mm to 3.5 mm from the surface facing the second isolation slit 313 of the transcap 403.

Another thing necessary to secure the creepage distance is that the thickness c of the first, second, third and fourth insulating spaced slits 416a to 416d of the transcap 403 should be within a range of 0.3 mm to 0.8 mm. . When the range of the thickness c is secured, whether the creepage distance required for insulation is satisfied will be described later in the drawings.

Meanwhile, in the primary and secondary bobbins 401 and 402, a plurality of insulation slits 407 capable of winding the primary and secondary coils 405 and 406 and the wound primary and secondary coils 405 and 406 are provided. A plurality of pins 410 that can be fixed are formed.

At this time, one of the plurality of insulation slits 407 of the primary and secondary bobbins 401 and 402 is formed between two slits 407a and 407b at the edges and both side surfaces of the primary and secondary bobbins 401 and 402. The secondary coils 405 and 406 are not wound, and the two slits 407a and 407b of the edges of the plurality of insulating slits 407 of the primary and secondary bobbins 401 and 402 and the primary and secondary coils 407 and 406. It is preferable that the width | variety d between the both side surfaces of the car bobbins 401 and 402 exists in the range of 1.0 mm-1.2 mm. In addition, when the said range is ensured, whether the creepage distance required for insulation is satisfy | filled is demonstrated in drawing later.

In addition, first, second, third, and fourth assembling grooves 408a to 408d are formed on the outer surface of the primary bobbin 401, and thus, the first, second, It is inserted into the 3 and 4 assembly protrusions 414a to 414d, respectively.

Similar to the primary bobbin 401, the fifth to twelfth assembling grooves 409a to 409h are formed on the outer surfaces of the two secondary bobbins 402, so that the transformer cap 403 may be formed during the inverter transformer assembly process. It is inserted into each of the fifth to twelve assembling protrusions 415a to 415h.

In addition, on the outer surface of the primary and secondary bobbins 401 and 402, a plurality of pins 410 for fixing the wound primary and secondary coils 405 and 406 are also formed to assemble an inverter transformer. This can prevent the shaking that may occur later.

In addition, the pair of cores 404 may use the same left and right "E" shaped cores, and the "U" shaped cores forming the outer jaws and the "I" shaped cores forming the inner jaws are combined. You can also use a core. Since the cores are simple in shape, they can improve the yield of the cores. Also, since the cores have the same right and left side, there is no risk of the cores being coupled to the wrong positions, thereby improving the workability of the inverter transformer manufacturing process.

Meanwhile, FIG. 5 is a diagram illustrating a creepage distance between the core 404 and the wound primary bobbin 401, and FIGS. 6A to 6D illustrate a gap between the core 404 and two wound secondary bobbins 402. A diagram showing creepage distances.

In the inverter transformer of the present invention, between the core 404 and the wound primary bobbin 401, between the core 404 and the wound secondary bobbin 402, the wound primary bobbin 401 and the secondary bobbin ( If the distance between the 402 is 1 mm or more, a creepage distance of 22 mm or more is required for insulation. Therefore, the creepage distance between the core 404 and the wound primary bobbin 401 and the creepage distance between the core 404 and the wound secondary bobbin 402 should each ensure a creepage distance of 11 mm or more.

Typically, the thickness of both sides of the primary and secondary bobbins is 1.1 mm, and the edge slit thickness of the primary and secondary bobbins is 0.5 mm, the vertical distance from the side of the isolation slit side of the edge slit to the insertion hole in the primary and secondary bobbins. And the vertical distance from the insertion hole in the primary and secondary bobbins to the isolation slit side portions on both sides of the primary and secondary bobbins is 4.0 mm, and the insertion hole inlets of the primary and secondary bobbins from the isolation slit side portions on both sides of the primary and secondary bobbins. The first and second bobbins with a vertical distance of 5.06 mm are used the most. Therefore, in the present invention, the first and second bobbins 401 and 402 also have thicknesses l _a5 and l _{b5 on both} sides of 1.1 mm, and the thicknesses l _a1 and l _b1 of the edge slits 407a and 407b are 0.5 mm. Mm, the vertical distance (l _a2 , l _b2 ) from the side portions of the isolation slits 413a and 413b of the edge slits 407a and 407b to the insertion hole 420 in the primary and secondary bobbins 401 and 402 and 1, Vertical distance ℓ _a4 , ℓ from the insertion hole 420 in the secondary bobbins 401, 402 to the portions of the first and second isolation slits 413a, 413b on both sides of the primary and secondary bobbins 401, 402. _b4 ) is from the side of the first and second isolation slits 413a and 413b on both sides of the 4.0 mm, primary and secondary bobbins 401 and 402 to the inlet hole 420 of the primary and secondary bobbins 401 and 402. The vertical distances l _a6 and l _b6 to reach are assumed to use primary and secondary bobbins 401 and 402 of 5.06 mm, which will be described later.

5, 6A, and 6B are diagrams illustrating creepage distances of portions of the first and second bobbins 401 and 402 close to the first and second isolation slits 413a and 413b of the transcap 403. The distance is the first and second bobbins 401 and 402 from the thicknesses of the edge slits 407a and 407b (l _a1 and l _b1 ), and the portions of the first and second isolation slits 413a and 413b of the edge slits 407a and 407b. Vertical distance (l _a2 , l _b2 ) to the insertion hole 420 in the inside, width (l _a3 , l _b3 ) between the slits 407a and 407b of the edge and both sides of the primary and secondary bobbins 401 and 402. , Vertical distance from the insertion hole 420 in the primary and secondary bobbins 401 and 402 to portions of the first and second isolation slits 413a and 413b on both sides of the primary and secondary bobbins 401 and 402. _a4 , l _b4 ), thicknesses on both sides of the first and second bobbins 401, 402 (l _a5 , l _b5 ), first and second isolation slits 413a, 413b on both sides of the first and second bobbins 401, 402. Vertical distance from the side part to the entrance of the insertion hole 420 of the primary and secondary bobbins 401 and 402 _a6 , L _b6 ).

In particular, the widths l _a3 and l _b3 between the edge slits 407a and 407b and both side surfaces of the primary and secondary bobbins 401 and 402 are 1.0 mm to 1.2 mm, as shown in FIG. 4A. It is preferable to be in a range. If the width ℓ _a3 , ℓ _b3 between the edge slits 407a and 407b and both sides of the primary and secondary bobbins 401 and 402 is 0.9 mm, the slits 407a and 407b of the edge and the Since the width ℓ _a3 , ℓ _b3 between both side surfaces of the primary and secondary bobbins 401 and 402 does not reach 1 mm, the first of the transcaps 403 of the primary and secondary bobbins 401 and 402 may be less than 1 mm. The creepage distances of the parts close to the two isolation slits 413a and 413b are the sum of ℓ _a1 , ℓ _a3 , ℓ _a5 , ℓ _a6 , or the sum of ℓ _b1 , ℓ _b3 , ℓ _b5 , ℓ _b6 , and all of them are 7.56 mm. It is impossible to secure 11 mm, which is a creepage distance between the core 404 and the wound primary and secondary bobbins 401 and 402.

However, when the width ℓ _a3 , ℓ _b3 between the edge slits 407a and 407b and both sides of the primary and secondary bobbins 401 and 402 is 1 mm, the primary and secondary bobbins 401 , 402, the creepage distance of the portion close to the first and second isolation slits 413a and 413b of the transcap 403 is s _a1 , s _a2 , s _a3 , s _a4 , s _{a5, s a6} , or s _b1 , ℓ _b2 , ℓ _b3 , ℓ _b4 , ℓ _b5 , ℓ _b6 add up to 15.66 mm, thus securing 11 mm, the creepage distance between the core 404 and the wound primary and secondary bobbins 401, 402. You can do it. However, if the width ℓ _a3 , ℓ _b3 between the slit 407a, 407b of the edge and both sides of the primary and secondary bobbins 401, 402 is larger than 1.2 mm, a creepage distance of 11 mm or more is secured, Since the primary coil 405 is not wound between the slits 407a and 407b of the edges and both sides of the primary and secondary bobbins 401 and 402, a winding area is excessively wasted. It is preferable that the widths l _a3 and l _b3 between 407a and 407b and both side surfaces of the primary and secondary bobbins 401 and 402 be in the range of 1.0 mm to 1.2 mm.

6C and 6D illustrate creepage distances of portions of the two secondary bobbins 402 facing the first and second isolation slits 413a and 413b of the transcap 403, and the creepage distance is an edge. The thickness of the slits 407a and 407b ℓ _b1 , and the first and second isolation slits of the transcap 403 in a side facing the first and second isolation slits 413a and 413b of the transcap 403. Widths (l _b2 ) of the first and second insulating spacers 416a and 416b and the third and fourth insulating spacers 416c and 416d measured in the directions 413a and 413b, and the first and second insulating spacers 416a and 416b) and the thickness ℓ _b3 of the third and fourth insulating spaced slits 416c and 416d, and the first of the transcap 403 at the first and second isolation slits 413a and 413b of the transcap 403. 2 isolated slit (413a, 413b), as measured by the facing direction of the first and second insulating spaced slits (416a, 416b) and the width of the third, fourth insulating spaced slits _{(416c, 416d) (ℓ b4} ), 2 of 2 Thickness of both sides of the primary bobbin 402 (ℓ _b5 ), the amount of two secondary bobbins 402 The sum of the vertical distances l _b6 from the side portions of the first and second isolation slits 413a and 413b to the entrances of the insertion holes 420 of the two secondary bobbins 402.

In particular, as mentioned in FIG. 4A, the width l _b2 of the first and second insulating spaces 416a and 416b and the third and fourth insulating spaces 416c and 416d ranges from 2.5 mm to 3.5 mm. It is preferable to exist in it, and it is preferable that the thickness (l _b3 ) of the 1st, 2nd insulating spaced slit 416a, 416b and the 3rd, 4th insulating spaced slit 416c, 416d exists in the range of 0.3 mm-0.8 mm. . If the first and second insulating spacers 416a and 416b and the third and fourth insulating spacers 416c and 416d have a width l _b2 of 2.5 mm, the first and second insulating spacers 416a may be used. , 416b and the third and fourth insulating spacers 416c and 416d have a thickness l _b3 of 0.5 mm, the first and second of the transcap 403 of the two secondary bobbins 402. The creepage distance of the side facing the isolation slit 413a, 413b is the sum of ℓ _b1 , ℓ _b2 , ℓ _b3 , ℓ _b4 , ℓ _b5 , ℓ _b6 , which is 12.16 mm, so that the core 404 and the winding 2 11 mm which is the creepage distance between the car bobbins 402 can be ensured.

However, if the width l _b2 of the first and second insulating spacers 416a and 416b and the third and fourth insulating spacers 416c and 416d is greater than 3.5 mm, the core formed in the transcap 403 The first and second insulating spaces 416a and 416b and the third and fourth insulating spaces 416c and 416d are formed up to the through hole 417 to prevent penetration of the core 404 into the transcap 403. Can be. In addition, if the thickness (l _b3 ) of the first and second insulating spacers 416a and 416b and the third and fourth insulating spacers 416c and 416d is larger than 0.8 mm, the primary and secondary coils 405 and 406 ) Is not wound, the width between the slit (407a, 407b) of the edge and both sides of the secondary bobbin 402 is widened, causing a problem that the winding area is wasted. Accordingly, the width ℓ _b2 of the first and second insulation spaced slits 416a and 416b and the third and fourth insulation spaced slits 416c and 416d is within a range of 2.5 mm to 3.5 mm, and the first and second insulation spaces are in the range of 2.5 mm to 3.5 mm. The thickness ℓ _b3 of the spaced slit 416a and 416b and the third and fourth insulating spaced slits 416c and 416d is preferably within the range of 0.3 mm to 0.8 mm.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and various substitutions, modifications, and changes within the scope without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It will be appreciated that such substitutions, changes, and the like should be considered to be within the scope of the following claims.

As described above, according to the inverter transformer according to the present invention, the primary and secondary bobbins by forming the isolation slit for insulating the primary and secondary bobbin and the insulation separation slit for securing the separation distance, Electrical insulation of the liver can be more reliably achieved. Also, as there is no need to secure a certain separation distance for the isolation of the primary and secondary bobbins as in the prior art, the winding area becomes wider, resulting in an increase in the transformer efficiency and occurrence in the transformer. It is effective to reduce the heat.

In addition, by using a core in which an "E" shaped core or an "U" shaped core forming an outer gyros and a "I" shaped core forming an inner gyros are used, the core is simple in shape to improve the yield of the core. As the left and right shapes are the same, the core is prevented from being coupled to the wrong position, thereby improving the workability of the transformer manufacturing process.

In addition, the inverter transformer according to the present invention is composed of one primary bobbin and two secondary bobbins to produce two outputs with one transformer, and has the same result as using two transformers in a small area. This can reduce the production cost of the transformer.

Claims (24)

A primary bobbin in which a plurality of insulating slits are formed and a primary coil is wound between the plurality of insulating slits; A plurality of secondary bobbins having a plurality of insulating slits formed thereon and having a secondary coil wound between the plurality of insulating slits; A transcap including one first bobbin coupling portion and two second bobbin coupling portions formed with two isolation slits so that the primary and secondary bobbins are respectively inserted; And And a pair of cores respectively penetrating through both sides of the transformer cap and inserted into insertion holes formed in the primary and secondary bobbins. The method of claim 1, The transformer cap is formed so as to center the first bobbin coupling portion into which the primary bobbin is inserted, and the second bobbin coupling portion into which the secondary bobbin is inserted on both sides of the first bobbin coupling portion. . The method of claim 1, Inverter transformer, characterized in that the first and second coil heat dissipation holes are formed in the upper portion of the transformer cap that can discharge the heat generated from the first and second coils. According to claim 1, The first bobbin coupling portion of the transcap, Inverter transformer, characterized in that the first, second, third, fourth assembly protrusions are formed to fix the primary bobbin, and determine the insertion direction of the primary bobbin. The method of claim 4, wherein And the first and third assembly protrusions are formed in the first isolation slit of the transcap, and the second and fourth assembly protrusions are formed in the second isolation slit of the transcap. According to claim 1, The second bobbin coupling portion of the transcap, Inverter transformer, characterized in that the fifth to 12 assembling projections are formed to fix the secondary bobbin, and determine the insertion direction of the secondary bobbin. The method of claim 6, And the fifth and seventh assembling protrusions are formed in the first isolation slit of the transcap, and the sixth and eighth assembling protrusions are formed on a surface facing the first isolation slit of the transcap. The method of claim 6, The ninth and eleventh assembling protrusions are formed on the second isolation slit of the transcap, and the tenth and twelfth assembling protrusions are formed on the surface facing the second isolation slit of the transcap. . The method of claim 5, The first and third assembling protrusions of the transcap protrude from a range of 1.5 mm to 2.0 mm from the first isolation slit, and the second and fourth assembling protrusions of the transcap are 1.5 mm to the second separating slit. Inverter transformer characterized in that protrudes in the range of 2.0mm. The method of claim 7, wherein The fifth and seventh assembling protrusions of the transformer cap protrude from the first isolation slit within a range of 1.5 mm to 2.0 mm. The method of claim 8, The ninth and eleventh assembling protrusions of the transformer cap protrude from the second isolation slit within a range of 1.5 mm to 2.0 mm. The method of claim 1, Inverter transformer, characterized in that the first, second, third, fourth insulating separation slit is formed in the two second bobbin coupling portion to secure the insulating separation distance. The method of claim 12, Inverter transformer, characterized in that the first and second insulating slit of the transcap is formed on the surface facing the first isolation slit of the transcap. The method of claim 12, The third and fourth insulating spaced slit of the transcap, the inverter transformer, characterized in that formed on the surface facing the second isolation slit of the transcap. The method of claim 13, Inverter transformer, characterized in that the first and second insulating spaced slit protrudes in the range of 2.5mm to 3.5mm from the surface facing the first isolation slit of the transcap. The method of claim 14, The third and fourth insulating spaced slit of the transcap, the inverter transformer, characterized in that protruding within the range of 2.5mm to 3.5mm from the surface facing the second isolation slit of the transcap. The method of claim 12, Inverter transformer, characterized in that the thickness of the first, second, third, fourth insulating spaced slit of the transformer cap is in the range of 0.3mm to 0.8mm. The outer surface of the primary and secondary bobbin, Inverter transformer, characterized in that a plurality of pins that can be fixed to the wound primary and secondary coils are formed. The method of claim 1, Inverter transformer, characterized in that the primary and secondary coil is not wound between the two slits of the edge of the plurality of insulating slits of the primary and secondary bobbin and both sides of the primary and secondary bobbin. The method of claim 19, Inverter transformer, characterized in that the width between the two slits of the edge of the plurality of insulating slits of the primary and secondary bobbin and both sides of the primary and secondary bobbin is in the range of 1.0mm to 1.2mm. The outer surface of the primary bobbin, according to claim 4, Inverter transformer, characterized in that the first, second, third, fourth assembling grooves are inserted into the first, second, third, fourth assembly projections. The method of claim 6, wherein the two secondary bobbin outer surface, Inverter transformer, characterized in that the fifth to 12 assembling grooves are inserted into the fifth to 12 assembling projections. The method of claim 1, The core is an inverter transformer, characterized in that the "E" shaped core. The method of claim 1, The core is an inverter transformer, characterized in that the core is a combination of the "U" shaped core to form an outer path, and the "I" shaped core to form an inner path.

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