KR102359297B1 - A transformer for smps - Google Patents

Abstract

In the present invention, in the transformer for SMPS, the base plate 110 and the first fitting pipe 111 protruding upward along the inner periphery of the first central hole 110a of the base plate 110, and the first fitting A bobbin 100 including a second fitting pipe 112 formed to be spaced apart from the pipe 111 to protrude; The primary side coil bundle 310 which is mounted on the base plate 110 and fixed by being fitted in the first fitting pipe 111 between the first fitting pipe 111 and the second fitting pipe 112; It is placed on the base plate 110 and fitted to the second fitting tube 112 and fixed, and the secondary side coil bundle 320 in which an induced current is generated by the current applied to the primary side coil bundle 310 is configured including and , according to this, there is an advantage in that the height of the product can be lowered to realize super slimness.

Description

Transformer for SMPS

The present invention relates to a transformer for a switch mode power supply (SMPS), and in particular, to a transformer for an SMPS that is easy to make the thickness (height) of a product super slim.

A variety of electrical and electronic communication devices such as TV (Television), monitor (Monitor), PC (Personal computer), OA (Office automation) devices, such as various types of power sources are required. Accordingly, such electrical and electronic communication devices generally include a power supply device that converts AC power supplied from the outside into power required for each electronic application device.

Recently, a power supply using a switching mode (eg, a switch mode power supply: SMPS) is mainly used among power supply devices, and the SMPS basically includes a switching transformer.

In general, switching transformers convert 85-265V AC power to 3-30V DC power by high-frequency oscillation of 25-100KHz. Therefore, it is possible to significantly reduce the size of the core and bobbin compared to a general transformer that converts 85-265V AC power to 3-30V AC power with frequency oscillation of 50-60Hz. Because it can stably supply low-voltage, low-current DC power to electronic applications, it is widely used in electronic applications that are in the trend of miniaturization in recent years.

However, the conventional transformer for SMPS is basically manufactured by winding a coil on a bobbin.

As described above, the conventional SMPS transformer wound on the bobbin is a method of winding the primary side coil and the secondary side coil in the up-down direction, that is, in the height direction.

In addition, the method of winding on a bobbin has a technical limitation in that workability is not good during the winding process. In addition, since the conventional technology is manufactured using a winding method, the arrangement of the windings is unevenly protruded, so the space occupied by the winding wire increases, and thus there is a problem in that the overall size is increased.

And, since the conventional transformer for SMPS causes interference by the terminal pins provided on the terminal block when winding the wires, the position of the terminal pins has no choice but to be fixed, and thus the position of the terminal pins cannot be adjusted in the height direction. there was

Document 1: Registered Patent Publication No. 10-1388891 (Announcement date: 2014.04.24) Document 2: Laid-open Patent Publication No. 10-2013-0106570 (published on September 30, 2013)

The present invention was created to solve the problems of the prior art as described above, and the purpose of the transformer for SMPS according to the present invention is,

First, the primary side coil bundle and the secondary side coil bundle are mounted side by side on the base plate 110 in the horizontal direction instead of in the vertical direction (height direction), but by mounting by a top-down insertion method, the height of the transformer is significantly increased It is lowered so that the transformer can be made ultra-slim,

Second, by allowing the primary and secondary side coil bundles to be mounted by the insertion method rather than the winding method, the assembly workability of the transformer is improved and the productivity of the product can be improved,

Third, by inserting and mounting the primary side coil bundle and the secondary side coil bundle side by side on the base plate from top to bottom, and forming the primary side terminal pin and the secondary side terminal pin outward in the horizontal direction of the primary side terminal block and the secondary side terminal block , It makes it possible to mount the primary and secondary side coil bundles regardless of the positions of the primary and secondary terminal pins, so that the primary and secondary side coil bundles can be mounted without interference with the primary and secondary side terminal pins. It allows you to adjust the position of the terminal pin on the car side,

Fourth, by allowing the primary and secondary coil bundles to be mounted without interference from the primary and secondary terminal pins, the transformer assembly workability is further improved and product productivity can be reliably improved,

Fifth, by adopting the method of loading the primary and secondary coil bundles into the bobbin and the cover, the insulation from the outside can be improved,

Sixth, when compared with the conventional upper and lower winding method, the alignment of the windings becomes uniform (even) so that the EMI characteristics can be improved and the characteristic deviation can be reduced,

Seventh, by standardizing and fixing the primary and secondary side coil bundles, the production of products can be easily and quickly performed compared to the conventional winding method, thereby improving workability,

Eighth, it is to provide a transformer for SMPS that is suitable to reduce the size of the product compared to the conventional product (transformer) in which the winding part protrudes unevenly because the primary and secondary side coil bundles are standardized and fixed.

The present invention for achieving the above object is a transformer for SMPS, in the transformer for SMPS, a base plate having a first central hole formed in the center, and a first formed protruding upward along the inner periphery of the first central hole of the base plate a bobbin including a first fitting pipe and a second fitting pipe spaced outwardly from the first fitting pipe and formed to protrude upward from the base plate; a primary coil bundle mounted on the base plate and fixed by being fitted to the first fitting pipe between the first fitting pipe and the second fitting pipe; It is mounted on the base plate and fixed by being fitted into the second fitting tube, characterized in that it comprises a secondary coil bundle in which an induced current is generated by a current applied to the primary coil bundle.

The transformer for SMPS of the present invention having the above configuration has the following effects.

First, the primary side coil bundle and the secondary side coil bundle are mounted side by side on the base plate in the horizontal direction instead of in the vertical direction (height direction), but by mounting by a top-down insertion method, the height of the transformer is significantly lowered and the It has the effect of realizing ultra-slim.

Second, by allowing the primary and secondary coil bundles to be mounted by the insertion method rather than the winding method, the assembly workability of the transformer is improved and the productivity of the product can be improved.

Third, by inserting and mounting the primary side coil bundle and the secondary side coil bundle side by side on the base plate from top to bottom, and forming the primary side terminal pin and the secondary side terminal pin outward in the horizontal direction of the primary side terminal block and the secondary side terminal block , it is possible to mount the primary and secondary coil bundles regardless of the positions of the primary and secondary terminal pins, so there is an effect that the primary and secondary coil bundles can be mounted without interference of the primary and secondary terminal pins. , has the effect of adjusting the position of the secondary terminal pin.

Fourth, by allowing the primary and secondary coil bundles to be mounted without interference from the primary and secondary terminal pins, the transformer assembly workability is further improved and product productivity can be reliably improved.

Fifth, by adopting a method of charging the primary and secondary coil bundles to the bobbin and the cover, there is an effect that insulation properties from the outside can be improved.

Sixth, when compared with the conventional vertical winding method, the alignment of the windings becomes uniform (even), so that the EMI characteristic is improved and the characteristic deviation can be reduced.

Seventh, by standardizing and fixing the primary and secondary coil bundles, there is an effect that the production of the product can be performed easily and quickly compared to the conventional winding method, and also the workability is improved.

Eighth, there is an effect of reducing the size of the product compared to the conventional product (transformer) in which the winding part protrudes unevenly because the primary and secondary coil bundles are standardized and fixed.

1 is a perspective view of a transformer (A) for SMPS according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of FIG. 1 ;
3 is a perspective view illustrating a state in which the upper and lower magnetic cores 420 and 410 are removed in FIG. 1 .
FIG. 4 is a cross-sectional view (cross-sectional view) taken along line AA in FIG. 3 .
FIG. 5 is a cross-sectional view (longitudinal cross-sectional view) taken along line BB in FIG. 3 .
6 is a bottom perspective view of the bobbin 100 and the cover 200 in the SMPS transformer (A) according to an embodiment of the present invention.
7 is a cross-sectional view of a modified embodiment of the transformer (A) for SMPS according to an embodiment of the present invention.
8 is a cross-sectional view of another modified embodiment of the transformer (A) for SMPS according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the transformer for SMPS of the present invention will be described in detail with reference to the accompanying drawings.

The SMPS transformer according to the present invention is mounted on the SMPS serving as a power converter in electrical and electronic communication devices such as TVs, PCs, computers, servers, OA devices, etc. to convert voltages for SMPS transformers to be.

The transformer (A) for SMPS according to an embodiment of the present invention includes a base plate 110 having a first central hole 110a formed in the center so that a middle foot 411 of a lower magnetic core 410 is interpolated, and the base. A first fitting pipe 111 protruding upward along the inner periphery of the first central hole 110a of the plate 110, and spaced apart from the first fitting pipe 111 outwardly in the base plate 110 A bobbin 100 including a second fitting pipe 112 protruding upwardly, and placed on the base plate 110, between the first fitting pipe 111 and the second fitting pipe 112 , the first The primary side coil bundle 310 fitted and fixed in the fitting pipe 111, and connected to the primary side terminal pin P1 and mounted on the base plate 110, the first fitting pipe 111 and the second fitting A primary side coil bundle 310 that is fitted and fixed between the pipes 112 in the first fitting pipe 111, is connected to a secondary side terminal pin P2, and is mounted on the base plate 110, so that the second It is fixed by being fitted in the fitting tube 112 and characterized in that it includes a secondary coil bundle 320 in which an induced current is generated by a current applied to the primary coil bundle 310 .

As described above, since the primary side coil bundle 310 and the secondary side coil bundle 320 are inserted and mounted parallel to the base plate 110 from top to bottom, the height h1 of the transformer A is significantly lowered, so that the transformer There are advantages to being slim.

In addition, since the primary and secondary side coil bundles 310 and 320 can be mounted by the insertion method rather than the winding method, there is an advantage in that the assembly workability of the transformer is improved and the productivity of the product is improved.

In the transformer for SMPS (A) according to an embodiment of the present invention, in the center of the primary side coil bundle 310, the first fitting hole (310a) for being extrapolated to the first fitting pipe 111 to be fitted. is formed, and in the primary side coil bundle 310, each conductive wire forming the coil bundle is fused to each other to form a standardized shape, and in the center of the secondary side coil bundle 320, the second fitting tube A second fitting hole 320a is formed to be extrapolated to 112 to be fitted, and the secondary side coil bundle 320 is formed by fusion of each conductive wire forming the coil bundle to each other to form a standardized shape. characterized in that

According to this, as compared with the conventional method of winding on a bobbin, there is an advantage in that the alignment of the windings becomes uniform (even), so that the EMI characteristic is improved and the characteristic deviation is reduced.

In addition, since the primary and secondary side coil bundles 310 and 320 are standardized and fixed, the working method can be easily performed compared to the conventional winding method on a bobbin, thereby improving workability.

In addition, since the primary and secondary side coil bundles 310 and 320 are standardized and fixed, the size of the product can be reduced compared to the conventional transformer in which the winding part is uneven.

In addition, the conventional winding method has an uneven outer surface and thus the outside is wound with an insulating tape. However, since the present invention is a standardized manufacturing method, a taping process using an insulating tape is unnecessary, so the work man-hours are reduced.

The primary and secondary coil bundles 310 and 320 are characterized in that they are hard without bending properties in both the longitudinal and lateral directions.

According to this, there is an advantage in that EMI characteristics are improved due to precision molding and variations in electrical characteristics are reduced.

In the transformer (A) for SMPS according to an embodiment of the present invention, the conductive wire forming the primary and secondary side coil bundles is coated with a fusing agent (of course, according to the embodiment, an insulating coating may be applied before coating the fusing agent. ), the fusion agent coated on the coated conductive wire is melted with, for example, a solvent (eg, alcohol) or melted by applying heat, and the conductive wires in a state in which the fusion agent is melted are in close contact with each other and the first and second The first and second coil bundles are wound by using a winding jig to form fitting holes 310a and 320a, and the fusion agent melted in the first and second coil bundles is hardened, so that the conductive wires are fusion-molded with each other and molded. characterized by having

And, in the SMPS transformer (A) according to an embodiment of the present invention, the lower magnetic core 410 and the upper magnetic core 420 may be further included. The lower magnetic core 410 has a midfoot 411 protruding from the center, an outer foot 412 protruding to the left and right of the midfoot 411, and a lower insertion space between the midfoot 411 and the outer foot 412 ( 413) is formed. The upper magnetic core 420 has a midfoot 421 protruding from the center, an outer foot 422 protruding to the left and right of the midfoot 421, and an upper insertion space between the midfoot 421 and the outer foot 422 ( 423) is formed.

In the SMPS transformer (A) according to an embodiment of the present invention, the primary side terminal block 121 formed to protrude upward from one end of the base plate 110 and spaced apart from the second fitting pipe 112 to one side; , provided by being partially molded on the primary side terminal block 121, and connected to the wire of the primary side coil bundle 310 and connected to the PCB substrate of the SMPS (not shown), the primary side terminal pin (P1), and the A secondary terminal block 122 that is spaced apart from the second fitting pipe 112 to the other side and protrudes upward from the other end of the base plate 110, and the primary terminal block 121 is partially molded and provided, and the 1 It is characterized in that the secondary side terminal pin (P2) connected to the wire of the secondary side coil bundle 310 and connected to the PCB board of the SMPS is further included.

In the transformer for SMPS (A) according to an embodiment of the present invention, the primary side terminal pin (P1) protrudes from the outer surface of the primary side terminal block 121 and then downwards [the direction of the PCB substrate of the SMPS] It is bent, and similarly, the primary terminal pin (P1) is protruded from the outer surface of the primary terminal block (121) and then is bent downward again.

As described above, the primary side coil bundle 310 and the secondary side coil bundle 320 are inserted and mounted parallel to the base plate 110 from top to bottom, and the primary side terminal pin (P1) and the secondary side terminal pin (P2) By forming outward in the horizontal direction of the primary side terminal block 121 and the secondary side terminal block 122, the primary and secondary side coil bundles 310 and 320 can be mounted regardless of the position of the primary and secondary side terminal pins P2. Thus, it is possible to mount the primary and secondary coil bundles 310 and 320 without interference from the primary and secondary terminal pins P2, and as a result, the position of the primary and secondary terminal pins P2 can be conveniently adjusted according to the mounting specifications. there is an advantage

As described above, since the primary and secondary side coil bundles 310 and 320 can be mounted without interference from the primary and secondary terminal pins P2, the transformer assembly workability is improved and product productivity is improved.

In the transformer for SMPS (A) according to an embodiment of the present invention, the inner surface 121a of the primary side terminal block 121 is curved to match the outer peripheral surface of the secondary side coil bundle 320, and the 2 The inner surface 122a of the secondary side terminal block 122 is curved to match the outer peripheral surface of the secondary side coil bundle 320 .

According to this, there is an advantage in that the secondary side coil bundle 320 can be stably held by using the existing primary and secondary side terminal blocks 121 and 122 without adopting a separate configuration.

In the SMPS transformer (A) according to an embodiment of the present invention, it is formed between the primary side terminal block 121 and the secondary side terminal block 122, and holds the outer peripheral surface of the secondary side coil bundle 320, In addition, it is characterized in that the shielding wall 115 for insulation from the outside is further included.

According to this, there is an advantage in that the insulation from the outside can be strengthened while holding the secondary side coil bundle 320 more stably.

In the transformer for SMPS (A) according to an embodiment of the present invention, the first insertion space ( S1) is formed, and the primary side coil bundle 310 is fitted and fixed to the first fitting pipe 111 to be inserted into the first insertion space S1, and the second fitting pipe 112 and 1 , A second insertion space S2 is formed by the space formed by the inner peripheral surfaces 121a and 122a of the secondary side terminal blocks 121 and 122 and the shielding wall 115, and the secondary side coil bundle 320 is fitted with the second fitting It is fitted and fixed to the tube 112, characterized in that it is inserted into the second insertion space (S2).

The primary side coil bundle 310 is fitted into the first fitting pipe 111 and provided in the first insertion space S1, and at the same time the secondary side coil bundle 320 is fitted into the second fitting pipe 112, In the state provided in the second insertion space (S2), the first insertion space (S1) and the second insertion space (S2) are occluded so that the primary side coil bundle 310 and the secondary side coil bundle 320 are the first The cover 200 is fastened to the bobbin 100 so as to be charged into the first and second insertion spaces S1 and S2, and to insulate the primary and secondary coil bundles 310 and 320 and the magnetic cores 410 and 420. It is characterized in that it is further included.

When the primary and secondary side coil bundles 310 and 320 are embedded by the cover 200 as described above, insulation properties from the upper and lower magnetic cores 410 and 420 are improved.

In the transformer (A) for SMPS according to an embodiment of the present invention, the cover 200 includes a primary coil bundle 310 and a secondary coil bundle ( 310 ) charged in the first and second insertion spaces S1 and S2 ( S2 ). It is characterized in that it is fastened to the bobbin 100 so as to be in contact with the upper surfaces of the primary and secondary side coil bundles 310 and 320 in order to catch the flow or play of the 320).

In the SMPS transformer (A) according to an embodiment of the present invention, the cover 200 is plate-shaped with a second central hole 210a formed in the center so that the middle foot 421 of the upper magnetic core 420 is interpolated. of the cover plate 210 and the second central hole 210a of the cover plate 210 spaced outward from the inner periphery (that is, spaced inward from the second insertion tube 212), so that the cover plate ( The first insertion tube 211 protrudes downward from the 210 and is inserted and fixed to the second fitting tube 112, and the first insertion tube 211 protrudes downward from the edge of the cover plate 210, and the primary side The inner side surface 121a of the terminal block 121 and the second insertion tube 212 inserted and fixed to the inner side surface 122a of the secondary terminal block 122 are included, and the primary side coil bundle 310 ) is fitted in the first fitting pipe 111 and provided in the first insertion space S1, and at the same time, the secondary coil bundle 320 is fitted in the second fitting pipe 112 to the second insertion space S2. In the state provided in the , the first insertion tube 211 is inserted into the second fitting tube 112 , and the second insertion tube 212 is fitted into the primary side terminal block 121 and the secondary side terminal block 122 . Thus, the cover 200 is characterized in that it is fastened to the bobbin (100).

In the transformer (A) for SMPS according to an embodiment of the present invention, a fitting groove 215 is formed in an upward concavity on one side and the other side of the second central hole 210a of the cover 200, and the fitting It is characterized in that the fitting projection (111a) is formed to protrude upward in the first fitting pipe (111) so as to be fitted in the groove (215).

In the transformer (A) for SMPS according to an embodiment of the present invention, on the upper surface of the cover plate 210, a second stepped groove ( 216) is formed, and a first stepped groove 116 is formed on the lower surface of the base plate 110 so that the lower magnetic core 410 can be seated in the longitudinal direction.

According to this, there is an advantage that the upper magnetic core 420 and the lower magnetic core 410 can be held in their initial positions without movement.

In the transformer (A) for SMPS according to an embodiment of the present invention, the first seating groove 131 is formed in a recessed shape on the upper surface of the primary side terminal block 121 and the secondary side terminal block 122 is recessed on the top surface. A second seating groove 132, and a first seating wing 231 protruding in the horizontal direction from the cover plate 210 of the cover 200 so as to fit and seat in the first seating groove 131, and the It is characterized in that it further includes a second seating wing 232 protruding from the cover plate 210 of the cover 200 in the horizontal direction so as to fit and seat in the second seating groove 132 .

According to this, while holding the position of the cover 200, it is possible to be positioned and fixed to the bobbin 100 stably without flow or play.

Next, a technical configuration for securing an insulation distance between the primary coil bundle 310 and the secondary coil bundle 320 by the coupling structure of the bobbin 100 and the cover 200 will be described.

First, as shown in Figure 7 (a), in the SMPS transformer (A) according to an embodiment of the present invention, the cover 200, between the first insertion tube 211 and It is spaced apart from the first insertion tube 211 so that the second fitting tube 112 is fitted and further includes a third insertion tube 213 protruding downward from the cover plate 210, and the second The fitting tube 112 is inserted between the first insertion tube 211 and the third insertion tube 213 so that the cover 200 is fastened to the bobbin 100 .

According to this, the insulation distance between the primary side coil bundle 310 and the secondary side coil bundle 320 can be secured by the coupling structure between the cover 200 and the bobbin 100 without adopting a separate structure for securing the insulation distance. There are advantages that can be Furthermore, it is possible to strengthen the fastening force between the cover 200 and the bobbin 100 .

And, as shown in (b) of Figure 7, in the SMPS transformer (A) according to an embodiment of the present invention, the bobbin 100 is the second fitting between the second fitting pipe (112). It is spaced apart from the second fitting tube 112 so that the first insertion tube 211 is inserted and further includes a third fitting tube 113 formed to protrude upward from the base plate 110, and the first insertion tube (211) is inserted between the second fitting pipe 112 and the third fitting pipe 113, characterized in that the cover 200 is fastened to the bobbin (100).

According to this, the insulation distance between the primary side coil bundle 310 and the secondary side coil bundle 320 can be secured by the coupling structure between the cover 200 and the bobbin 100 without adopting a separate structure for securing the insulation distance. There are advantages that can be Furthermore, it is possible to strengthen the fastening force between the cover 200 and the bobbin 100 .

And, as shown in FIGS. 8 (a) and 8 (b), in the SMPS transformer (A) according to an embodiment of the present invention, the cover 200 is the first insertion tube ( 211) and is configured to further include a third insertion tube 213 protruding downwardly from the cover plate 210, and the bobbin 100 is spaced apart from the second fitting tube 112 to form the base It is configured to further include a third fitting pipe 113 formed to protrude upward from the plate 110, and the second and third fitting pipes 112 and 113 and the first and third fitting pipes 211 and 213 are alternately fitted with each other. The cover 200 is characterized in that it is fastened to the bobbin (100).

According to this, the insulation distance between the primary side coil bundle 310 and the secondary side coil bundle 320 is further increased by the coupling structure between the cover 200 and the bobbin 100 without adopting a separate structure for securing the insulation distance. There is an advantage in that the insulation distance can be reliably secured by lengthening it. Furthermore, the fastening force between the cover 200 and the bobbin 100 can be further strengthened.

In the transformer (A) for SMPS according to an embodiment of the present invention, the primary side coil bundle 310 and the second fitting pipe ( 112) to impregnate the secondary coil bundle 320, which is inserted into the second insertion space (S2), with the impregnating liquid, by putting the impregnating liquid into the first and second insertion spaces (S1, S2) to the primary side coil The primary side coil bundle 310 and the secondary side coil bundle 320 by impregnating the bundle 310 and the secondary side coil bundle 320 with an impregnating solution, and curing (eg, thermal curing) the impregnating solution filled as described above. It is characterized in that the bobbin 100 and the cover 200 is integrated.

The fact that the primary side coil bundle 310 and the secondary side coil bundle 320 are integrated with the bobbin 100 and the cover 200 means that the primary and secondary side coil bundles 310 and 320 are formed into the bobbin 100 by hardening of the impregnating liquid. ) and the cover 200 means a state of being one body, and in this way, the primary and secondary side coil bundles 310 and 320 are integrated with the bobbin 100 and the hardened impregnation solution inside the cover 200 . As a result, the primary and secondary side coil bundles 310 and 320 can be more firmly fixed to the bobbin 100 and the cover 200, and in particular, noise due to vibration of the coil during operation due to the application of current can be prevented. , there is an advantage that the insulating properties can be further improved.

The impregnating liquid impregnates the primary and secondary coil bundles 310 and 320 provided in the bobbin 100 and the cover 200 into the bobbin 100 and the cover 200, and then hardens the primary and secondary sides by curing. As a liquid for integrating the coil bundles 310 and 320 with the bobbin 100 and the cover 200, it may be composed of, for example, an insulating liquid.

The impregnating liquid includes, for example, an epoxy resin liquid, a varnish liquid, and a urethane resin liquid.

As described above, preferred embodiments according to the present invention have been reviewed, and it is common knowledge in the technical field that the present invention can be implemented in other specific forms without changing the technical spirit or essential features in addition to the above-described embodiments. It is self-evident to those who have Therefore, it should be understood that the above-described embodiments are illustrative and not restrictive.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

A: SMPS transformer according to an embodiment of the present invention
100: bobbin
110: base plate 110a: first central hole
111: first fitting pipe 111a: fitting projection
112: second fitting pipe 113: third fitting pipe
115: shield wall 116: first stepped groove
121: primary terminal block 121a: inner side of primary terminal block
122: secondary terminal block 122a: inner surface of secondary terminal block
P1: Primary terminal pin P2: Secondary terminal pin
131: first seating groove 132: second seating groove
S1: first insertion space S2: second insertion space
200: cover 210: cover plate
210a: second central hole
211: first insertion tube 212: second insertion tube
213: third cannula
215: fitting groove 216: second stepped groove
231: first seating wing 232: second seating wing
310: primary side coil bundle 310a: first fitting hole
320: secondary coil bundle 320a: second fitting hole
410: lower magnetic core 411: midfoot
412: outer foot 413: lower insertion space
420: upper magnetic core 421: midfoot
422: outer foot 423: upper insertion space

Claims (6)

In the transformer for SMPS,
A base plate 110 having a first central hole 110a formed in the center, and a first fitting pipe 111 protruding upward along the inner periphery of the first central hole 110a of the base plate 110, The bobbin 100 is spaced outwardly from the first fitting pipe 111 and includes a second fitting pipe 112 formed to protrude upward from the base plate 110;
a primary coil bundle 310 mounted on the base plate 110 and fixed to the first fitting pipe 111 between the first fitting pipe 111 and the second fitting pipe 112; and
The secondary side coil bundle 320 is mounted on the base plate 110 and fitted to the second fitting pipe 112 and fixed, and an induced current is generated by the current applied to the primary side coil bundle 310;
Transformer for SMPS, characterized in that it comprises a.
The method according to claim 1,
A first fitting hole 310a for being extrapolated and fixed to the first fitting pipe 111 is formed in the center of the primary side coil bundle 310, and the primary side coil bundle 310 is a coil bundle. Each conductive wire to be formed is fused to each other to form a standardized shape,
In the center of the secondary side coil bundle 320, a second fitting hole 320a for being extrapolated to and fixedly fitted to the second fitting pipe 112 is formed, and the secondary side coil bundle 320 is a coil bundle. Transformer for SMPS, characterized in that each conductive wire to be formed is fused to each other to form a standardized shape.
The method according to claim 1,
a primary terminal block 121 spaced apart from the second fitting pipe 112 to one side and protruding upwardly from one end of the base plate 110;
A primary terminal pin (P1) provided on the primary side terminal block 121, connected to the wire of the primary side coil bundle 310 and connected to the PCB board of the SMPS;
A secondary terminal block 122 that is spaced apart from the second fitting pipe 112 to the other side and protrudes upwardly from the other end of the base plate 110;
It is provided on the primary side terminal block 121, is connected to the wire of the primary side coil bundle 310, and is configured to further include a secondary side terminal pin P2 connected to the PCB board of the SMPS,
The inner surface 121a of the primary side terminal block 121 is curved to match the outer peripheral surface of the secondary side coil bundle 320,
SMPS transformer, characterized in that the inner surface (122a) of the secondary side terminal block (122) is curved to match the outer peripheral surface of the secondary side coil bundle (320).
4. The method according to claim 3,
A first insertion space (S1) is formed by the space formed by the first fitting pipe (111), the second fitting pipe (112), and the base plate (110),
The primary side coil bundle 310 is fitted and fixed to the first fitting pipe 111 to be inserted into the first insertion space S1,
A second insertion space (S2) is formed by the space formed by the inner peripheral surfaces (121a, 122a) and the shielding wall (115) of the second fitting pipe (112) and the primary and secondary side terminal blocks (121, 122),
The secondary side coil bundle 320 is fitted and fixed to the second fitting pipe 112, and is inserted into the second insertion space S2.
5. The method according to claim 4,
The primary side coil bundle 310 is fitted in the first fitting pipe 111 to be provided in the first insertion space S1, and the secondary side coil bundle 320 is fitted to the second fitting pipe 112 to make the first 2 In the state provided in the insertion space (S2), the first and second insertion spaces (S1) and the second insertion space (S2) are occluded so that the primary and secondary coil bundles 310 and 320 are inserted into the first and second insertion spaces ( S1, S2), and the cover 200 fastened to the bobbin 100 so as to insulate between the primary and secondary coil bundles 310 and 320 and the magnetic cores 410 and 420 is further included.
The cover 200 is
The upper surface of the primary and secondary coil bundles 310 and 320 in order to hold the flow or play of the primary coil bundle 310 and the secondary coil bundle 320 charged into the first and second insertion spaces S1 and S2. SMPS transformer, characterized in that it is fastened to the bobbin (100) so as to be in contact with the .
6. The method of claim 5,
The cover 200 is
A cover plate 210 having a second central hole 210a formed in the center thereof, and
The second center hole 210a of the cover plate 210 is spaced outward from the inner periphery to protrude downward from the cover plate 210, and is inserted into the second fitting pipe 112 to be fitted and fixed. 1 Insertion tube 211 and;
It is formed to protrude downward from the edge of the cover plate 210, and is inserted and fixed coaxially to the inner surface 121a of the primary side terminal block 121 and the inner surface 122a of the secondary side terminal block 122. It is configured to include a second insertion tube (212),
The primary side coil bundle 310 is fitted into the first fitting pipe 111 and provided in the first insertion space S1, and at the same time the secondary side coil bundle 320 is fitted into the second fitting pipe 112, In the state provided in the second insertion space (S2), the first insertion tube 211 is inserted into the second fitting tube 112, and the second insertion tube 212 is connected to the primary side terminal block 121 and the secondary side. SMPS transformer, characterized in that the cover (200) is fastened to the bobbin (100) by being inserted into the terminal block (122).

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