KR101664092B1

KR101664092B1 - Coil assembly type transformer

Info

Publication number: KR101664092B1
Application number: KR1020150071292A
Authority: KR
Inventors: 박동식
Original assignee: (주)코러싱
Priority date: 2015-05-21
Filing date: 2015-05-21
Publication date: 2016-10-14

Abstract

The present invention relates to a transformer manufactured by laminating and assembling a coil unit manufactured as a printed circuit board with a first coil and a second coil as a monomer. The transformer according to the present invention comprises: a base layer in which a core hole is formed in the center; a first coil pattern layer in which a coil pattern is prepared as a conductive material so that a magnetic route is formed by supplied power on one side of the base layer; a first insulating layer coated with a predetermined thickness so as to cover the coil pattern on one side of the base layer in which the first coil pattern layer is formed; a second coil pattern layer which is electrically connected and laminated to the first coil pattern layer; a second insulating layer which is coated and laminated with a predetermined thickness so as to cover the coil pattern of the second coil pattern layer; the coil unit which is composed of a unit including a terminal unit that electrically connects the first coil pattern layer and the second coil pattern layer to an external circuit and is laminated as the first coil and the second coil; and a core unit which is inserted into the core holes of the first coil and the second coil and is combined with the upper part and the lower part of the coil unit. The present invention is designed to provide a transformer capable of assembling a coil pattern formed on the surface without damage, showing an excellent insulating performance between the coils and achieving a desired coil winding ratio by a simple assembly.

Description

[0001] The present invention relates to a coil assembly type transformer,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer using a printed circuit board, and more particularly, to a transformer manufactured by stacking a coil unit made of a printed circuit board as a unitary body with a primary coil and a secondary coil.

Transformers are used as electronic devices for increasing or decreasing the AC voltage. The transformer has an insulation gap between the primary and secondary coils, and the voltage induced in the secondary coils is sized according to the voltage applied to the primary coils and the turns ratio of the primary and secondary coils.

Conventional transformers are not suitable for use in thin and light electronic products because they have large cores or bobbins in which coils are wound and are heavy in weight. Thus, a transformer in which a coil pattern is formed on a printed circuit board is used.

Korean Patent Laid-Open Publication No. 2011-0138576 and Patent Publication No. 2014-0117835 disclose a transformer manufactured by a printed circuit board, which comprises a plurality of printed circuit boards on which a first coil pattern and a second coil pattern are formed And assembled with core portions provided on the upper and lower sides. The transformer having such a structure does not require a coil winding operation by forming a coil pattern on a printed circuit board, and the size and volume of the element can be reduced due to the coil pattern printed on the plane.

Since the transformer uses an insulating sheet (or insulating paper) for insulating the coil, there is a possibility that the coil pattern is damaged or damaged by friction between the insulating sheet and the substrate surface during the assembling process. It is burdensome to fabricate the center or both ends of the insulating sheet having a thickness to be assembled.

In addition, when the primary coil and the secondary coil are formed in multiple layers and assembled, it is troublesome that a plurality of insulating sheets are individually aligned and stacked and assembled. By the uniform pressure applied by the core, The contact surfaces between the substrates are not uniformly contacted with each other, so that there is a slight difference in the insulation performance. Therefore, there is a limit to use for precise power control.

1. Korean Patent Publication No. 2011-0138576 (entitled "Planar Transformer, December 28, 2012) 2. Korean Patent Publication No. 2014-0117835 (Title: Transformer manufactured by printed circuit board, 2014.10.08)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned technical problems, and it is an object of the present invention to provide a coiling machine which can be assembled without damaging or damaging a coil pattern formed on the surface, It is an object of the present invention to provide a transformer that can be implemented.

According to an aspect of the present invention, there is provided a transformer comprising: a base layer having a core hole formed at a center thereof; and a coil pattern having a conductive material formed on one surface of the base layer to form a magnetic path by an applied power source A first coil pattern layer, a first insulating layer coated on a surface of the base layer on which the first coil pattern layer is formed to have a predetermined thickness to cover a coil pattern, a second coil electrically connected to the first coil pattern layer, A second insulating layer coated and laminated to a predetermined thickness so as to cover the coil pattern of the second coil pattern layer, and a terminal portion electrically connecting the first coil pattern layer and the second coil pattern layer to an external circuit And a core portion inserted into core holes of the primary coil and the secondary coil and coupled to upper and lower portions of the coil portion.

According to the present invention, the second coil pattern layer may be laminated on one surface of the base layer on which the first coil pattern layer is formed, or on the other surface of the base layer.

According to another aspect of the present invention, a coil pattern layer and an insulating layer may be further formed on the first insulating layer or the second insulating layer.

Also, according to the present invention, a plurality of primary and secondary coils may be stacked in a staggered manner with different coils interposed therebetween.

In addition, according to the present invention, the terminal portions may be connected to each other by connecting pins by being aligned by the primary coil and the secondary coil.

Also, according to the present invention, the primary coil terminal portion and the secondary coil terminal portion can be aligned at positions facing each other.

According to the present invention, since the insulating layer is coated to protect the coil pattern formed on the printed circuit board, the coil pattern due to the external friction during assembly is not damaged or damaged and excellent insulation performance is exhibited. A transformer can be manufactured.

In addition, according to the present invention, a plurality of primary coils and secondary coils patterned with a predetermined unit coil value can be assembled to realize an arbitrary winding ratio, Control is possible.

1 is a perspective view of a transformer in accordance with an embodiment of the present invention.
2 is a plan view of Fig.
3 is an exploded view of Fig.
Fig. 4 is a view showing a coil pattern formed on the coil of Fig. 3. Fig.
5 is a coil sectional view of Fig.
6 is a cross-sectional view of a coil used in a transformer in accordance with another embodiment of the present invention.
7 is an exploded view of a transformer according to another embodiment of the present invention.
Fig. 8 is a sectional view of Fig. 7. Fig.

Hereinafter, a coil assembly type transformer according to the present invention will be described with reference to FIGS. 1 to 6 attached hereto.

FIG. 1 is a perspective view of a transformer according to an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is an exploded view. 1 to 3, a transformer 100 according to an embodiment of the present invention includes a primary coil 101 and a primary coil 101, which are connected by an external power source to form a magnetic field, And core portions 210 and 220 coupled to upper and lower portions of the coil portion 200 to assist in forming a magnetic field of the coils 101 and 102. [

4 is a view showing a coil pattern formed on the coil of the present invention, and Fig. 5 is a sectional view of the coil. 4 and 5, a coil according to the present invention includes a base layer 110, a first coil pattern layer 120, a first insulating layer 130, a second coil pattern layer 140, (150), and a terminal portion (160).

The base layer 110 is formed in a plate shape having a predetermined thickness and has a core hole 100a through which the core is inserted. The base layer 110 may be made of a thermosetting resin such as phenol resin or epoxy resin so as not to bend well. The base layer 110 may be made of polyimide or polyester, which is a thermoplastic resin, and may be easily bent.

The first coil pattern layer 120 is a layer in which a coil pattern P is formed on one side of the base layer 110. The coil pattern P corresponds to a coil wound on the core in the prior art, Generates a magnetic path. The first coil pattern layer 120 is made of a conductive material for forming a magnetic path. As the conductive material, a conductive paste such as a metal foil such as a copper foil, an aluminum foil or an aluminum foil or an ink in which a metal oxide is dispersed may be used. When a metal foil is used, the coil pattern P can be formed by a photolithography method using a photomask and an etching solution. When a conductive paste is used, a coil pattern P is formed using a printing electron method such as a screen printing method . The coil pattern P may be formed in a circular shape, an elliptical shape, or a polygonal shape having a starting point and an ending point around the core hole 100a.

The first insulating layer 130 is coated to a predetermined thickness with an insulating material so as to cover and protect the coil pattern P on one surface of the base layer 110 on which the first coil pattern layer 120 is formed. It is preferable that the first insulating layer 130 is formed on the first coil pattern layer 120 to have a thickness of at least 6 to 10 μm. If the thickness is less than 6 μm, the thickness of the coating film is too thin, There is a risk of exposure to the outside, and if it exceeds 10 mu m, the total volume of the transformer becomes large. For example, when the thickness of the first coil pattern layer 120 is 10 mu m, the first insulating layer 130 has a thickness of 16 to 20 mu m and the thickness of the first coil pattern layer 120 is 20 mu m The first insulating layer 130 preferably has a thickness of 26 to 30 mu m.

The second coil pattern layer 140 is a layer that is electrically connected to the first coil pattern layer 120 on the upper surface of the first insulating layer 130 on which the first coil pattern layer 120 is formed, A pattern P is formed. The first coil pattern layer 120 and the second coil pattern layer 140 are electrically connected through a via hole 100b coated with a conductor. According to the present invention, the connected coil pattern P of the first and second coil pattern layers 120 and 140 is formed into a unit coil having a unit winding value by normalizing the line width, height, and pattern length to have constant values.

The second insulating layer 150 is a layer laminated on the upper surface of the first insulating layer 130 to have a predetermined thickness so as to cover the coil pattern of the second coil pattern layer 140. The first insulating layer 120 ) And the same film thickness.

The second coil pattern layer 140 and the second insulating layer 150 may be formed on the other surface of the base layer 110 where the first coil pattern layer 120 is not laminated. 110 are shown.

The base layer 110, the first insulating layer 130, and the second insulating layer 150 are preferably made of the same synthetic resin material, so that the interfacial contact between the base layer 110 and the second insulating layer 150 can be improved, . Accordingly, when the base layer 110 is hardened, the first and second insulating layers 130 and 150 are preferably formed of a phenol resin or an epoxy resin coating layer. In the case where the base layer 110 is softly formed, It is preferably formed of an ester. As described above, according to the present invention, since the coil pattern P is coated with a sufficient coating film thickness, it can be protected from the outside as it is integrated, and excellent insulating performance is exerted as it is uniformly coated over the entire surface of the base layer 110 or the insulating layer . It is needless to say that the winding ratio of the coil surrounding the core can be further increased by further stacking the coil pattern layer and the insulating layer mutually connected by the via hole on the insulating layer 130 or the second insulating layer 150.

The terminal portion 160 is configured to electrically connect the primary coil 101 and the secondary coil 102 to an external circuit and is formed of terminal holes 160a and 160b through which the inner wall surface is coated with a conductor and penetrates the substrate . The terminal holes 160a and 160b are formed at the end points of the coil patterns P of the first coil pattern layer 120 and the second coil pattern layer 140 that are not connected to each other, Lt; / RTI > It is preferable that the primary coil 101 and the terminal portion 160 of the secondary coil 102 are arranged in positions facing each other.

The core portions 210 and 220 are inserted into the core holes 100a of the primary coil 101 and the secondary coil 102 to function to assist in forming a magnetic field. The core portions 210 and 220 according to the present embodiment include a lower core portion 210 having a protrusion 211 at the center thereof and an upper core portion 220 coupled to the lower core portion 210. The core portions 210 and 220 may be made of a magnetic powder core or a core including ferrite.

FIG. 7 is an exploded perspective view of a transformer according to another embodiment of the present invention, and FIG. 8 is a sectional view of FIG. Referring to FIGS. 7 and 8, a transformer 300 according to another embodiment of the present invention includes a plurality of primary coils 301, 303, ..., secondary coils 302, 304, And is connected to the upper core portion 220. The primary and secondary coils having the unit winding value are aligned by the coils and connected by the terminal pins 370. Accordingly, a plurality of primary coils and secondary coils patterned with a predetermined unit coil value are assembled It is possible to realize an arbitrary winding ratio, and various power supply control is possible only by assembling the coil. It is preferable that the primary coils 301 and 303 and the secondary coils 302 and 304 are stacked in a staggered manner with different coils interposed therebetween in order to reduce the intercooled distribution capacity and increase the efficiency.

According to the present invention, even if a plurality of coils are laminated by face-to-face bonding, the insulating layer is coated in a laminated structure so as to cover the coil pattern, so that the coil pattern due to external friction during assembly can be prevented from being damaged or damaged, Excellent insulation performance can be exhibited when a car coil is coupled.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Therefore, it is to be understood that, within the scope of the appended claims, the invention may be practiced with other modifications within the spirit and scope of the appended claims. .

100, 300: transformer 100a: core hole
100b: via holes 101, 301, 303: primary coil
102, 302, 304: secondary coil 110: base layer
120: first coil pattern layer 130: first insulating layer
140: second coil pattern layer 150: second insulating layer
160: terminal portion 160a, 160b: terminal hole
170,370: terminal pin 200: coil part
210: lower core part 220: upper core part
P: coil pattern

Claims

As a transformer capable of assembling a coil,
A first coil pattern layer having a coil pattern formed of a conductive material so as to form a magnetic path by an applied power source on one surface of the base layer; A second coil pattern layer electrically connected to the first coil pattern layer and stacked thereon, a second coil pattern layer formed on the first coil pattern layer to cover the coil pattern of the second coil pattern layer, And a terminal portion electrically connecting the first coil pattern layer and the second coil pattern layer to an external circuit, wherein the plurality of primary coils and the secondary coils are provided, A coil part stacked in a staggered shape with different coils interposed therebetween; And
And a core portion inserted into the core holes of the primary coil and the secondary coil and coupled to the upper and lower portions of the coil portion.

The method according to claim 1,
Wherein the coil portion includes:
Wherein the second coil pattern layer is laminated on one surface of the base layer on which the first coil pattern layer is formed or on the other surface of the base layer.

3. The method of claim 2,
Wherein the coil portion includes:
Wherein a coil pattern layer and an insulating layer are further provided on the first insulating layer or the second insulating layer.

The method according to claim 1,
Wherein the terminal portions are connected to each other by terminal pins aligned with the primary and secondary coils.

5. The method of claim 4,
Wherein the primary coil terminal portion and the secondary coil terminal portion are aligned at positions opposite to each other.

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