KR102024851B1 - A transformer - Google Patents

Abstract

The present invention relates to a transformer, which is mounted on the secondary coil element 210, the inner surface 210b of the secondary coil element 210, and the primary side for generating an induced current in the secondary coil element 210. 1 is a synthetic resin material in which the central hole 220a is formed so as to correspond to the coil element 100 and the secondary side central hole 210a, and in contact with the primary coil element 100 placed on the secondary coil element 210. And a lid 220 covering the secondary coil element 100, wherein the primary coil element 100 has a first hollow core 110a formed at the center thereof, and the insulated coated copper wire is brought into contact with each other. The main air core coil part 110 formed by winding in a shape and the second air core 130a are formed in the center to be in contact with the main air core coil part 110 and communicate with the first air core 110a. Are formed by winding in contact with each other in a flat plate shape so that the main air core coil unit 110 It is characterized in that it comprises a secondary coil unit 220 for generating and outputting an induced voltage by the induction, according to this, there is an advantage that can improve the efficiency and miniaturize the product.

Description

Transformer {A TRANSFORMER}

TECHNICAL FIELD The present invention relates to a transformer, and more particularly, to a transformer adapted to be able to improve the efficiency of the transformer and reduce the cost.

In general, a transformer has a primary coil and a secondary coil. In general, a primary coil is used as an input terminal and a secondary coil is used as an output terminal.

Among the transformers, a technique proposed for a small transformer used in a mobile phone charger or the like is disclosed in "Transformer" according to Korean Patent No. 10-1579427 (Dec. 22, 2015).

In the case of the transformer according to No. 10-1579427, the transformer primary side coil element is composed of a so-called "PCB type primary side coil element" implemented by patterning a conductive material on an insulating substrate.

The PCB type primary side coil element according to the related art is manufactured by coating a copper foil on an insulating substrate and forming a coil circuit pattern by etching or the like.

However, the prior art PCB type primary coil device has the following problems.

First, since a circuit pattern is formed on a PCB, the manufacturing period is basically long, so there is a problem that it is not suitable for manufacturing a short delivery time.

Second, since the PCB type primary coil element is basically patterned on the PCB, it is difficult to cope with design diversification (product tuning).

Third, when the number of turns of the circuit pattern increases, there is a problem that the volume of the primary coil element increases due to the increase of the layer (LAYER) and the thickness of the PCB board, and the cost of the product increases due to the increase in the price of the PCB board. .

Document 1: Registered Patent Publication 10-1579427 (Notice: 2012.12.22.) Document 2: Published Patent Publication 10-2016-0041837 (Published: 2016.04.18.)

The present invention was created to solve the problems of the prior art as described above, the object of the transformer according to the present invention,

First, by implementing the primary side coil element such that the insulated coated copper wire is wound in a flat plate shape while contacting each other, unlike the conventional primary side coil element of the PCB type, the resistance is low and the heat generation is low (excellent heat generation characteristics), Due to the skin effect on the copper wire, the transfer efficiency to the secondary coil can be improved.

Second, by manufacturing the primary side coil element in a concentric flat plate without using a bobbin, it is possible to reduce the size of the primary side coil element itself,

Third, to make the size of the product even smaller (thinner and smaller transformer),

Fourth, to replace or replace the primary coil element (so-called "PCB type primary coil element") for transformers implemented on a conventional PCB substrate, which is a problem of the conventional "PCB type primary coil element". High manufacturing cost, long production time and long development period, not easy to cope with design tuning, and the large number of turns of the coil make the product bulky.

Fifth, it is to provide a transformer that is suitable for inserting the primary coil element in the holding member to prevent the flow or play of the primary coil element and to enable a stable mounting.

The transformer according to the present invention for achieving the above object is a flat plate coil consisting of a terminal, a coil pattern portion extending from the terminal to form a flat spiral pattern, and a flat plate other than the terminal having a secondary side central hole formed therein. A secondary coil element comprising an insulating portion made of a synthetic resin having a built-in coil, a primary coil element mounted on an inner surface of the secondary coil element, and configured to generate an induced current in the secondary coil element, and the second coil element. Synthetic resin material having a central through-hole corresponding to the vehicle-side central hole, comprising a cover for covering the primary coil element in contact with the primary coil element placed in the secondary coil element,

The primary coil element includes a main air core coil portion formed at a center of the first air core and wound by winding a coated copper wire in contact with each other, and the main air core coil portion, and the first core core is in contact with the main core coil portion. A second air core is formed at the center so as to communicate with the air core, and is formed by winding insulated coated copper wires in contact with each other to form a flat plate, and generates and outputs an induced voltage by the main air core coil unit and electromagnetic induction. Characterized in that comprises a.

The transformer of the present invention having the configuration as described above has the following effects.

First, by implementing the primary side coil element such that the insulated coated copper wire is wound in a flat plate shape while contacting each other, unlike the conventional primary side coil element of the PCB type, the resistance is low and the heat generation is low (excellent heat generation characteristics), Due to the skin effect on the copper wire, the transfer efficiency to the secondary coil is improved.

Second, by fabricating the primary coil element in a hollow core plate type without using a bobbin, there is an effect that can reduce the size of the primary coil element itself.

Third, there is an effect that the size of the product can be further downsized (thinner and smaller effect of the transformer).

Fourth, to replace or replace the primary coil element (so-called "PCB type primary coil element") for transformers implemented on a conventional PCB substrate, which is a problem of the conventional "PCB type primary coil element". The high cost of manufacturing, the long production time and the long development period, the difficulty in coping with design tuning, and the large number of turns of the coil, the volume of the product can be solved. .

Fifth, by inserting the primary side coil element in the holding member, there is an effect that can prevent the flow or play of the primary side coil element and to be stable mounting.

1 is an exploded perspective view of a transformer A according to an embodiment of the present invention.
FIG. 2 is a conceptual view illustrating a state in which a coil pattern part 211b is molded in an insulation part 212 of the secondary coil device 210 of FIG. 1.
3 is a bottom perspective view of the lid 220 in FIG. 1.
4 is a cross-sectional view taken along line BB of the primary coil device 100 in FIG. 1.
FIG. 5 is an exploded perspective view of the primary coil device 100 in FIG. 1.
6 is an exploded perspective view of a modified embodiment of the primary coil device 100 in the transformer according to an embodiment of the present invention.
7 is an exploded perspective view of another modified embodiment of the primary coil device 100 in the transformer according to an embodiment of the present invention.

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

The transformer according to an embodiment of the present invention relates to a small transformer for a charger and an adapter used in a charger or an adapter of a portable terminal.

Transformer A according to an embodiment of the present invention is characterized in that it comprises a secondary coil element 210, the primary coil element 100 and the cover 220.

The secondary coil element 210 includes a terminal coil 211 formed of a terminal pattern 211a, a coil pattern portion 211b extending from the terminal 211a, and formed into a flat spiral pattern. The central hole 210a is formed, and is composed of an insulating part 212 made of a synthetic resin material having a flat coil 211 excluding the terminal 211a.

The primary coil device 100 is mounted on the inner surface 210b of the secondary coil device 210 and is configured to generate an induced current in the secondary coil device 210.

The cover 220 is a synthetic resin material in which a central through hole 220a is formed so as to correspond to the secondary side central hole 210a and in contact with the primary coil element 100 mounted on the secondary coil element 210. It is a structure which covers the primary side coil element 100.

On the other hand, in the transformer (A) according to an embodiment of the present invention, a magnetic core for increasing the magnetic coupling force between the primary coil element 100 and the secondary coil element 210, that is to minimize the leakage magnetic field (not shown) C) may be further included, and detailed description thereof will be omitted since the magnetic core itself is a known configuration.

In the transformer A according to an embodiment of the present invention, the primary coil element 100 has a first hollow core 110a formed at the center thereof, and the insulation-coated copper wire contacts each other and is wound in a flat plate shape. The main air core coil unit 110 and the main air core coil unit 110 are formed in contact with each other, and the second air core 130a is formed at the center so as to communicate with the first air core 110a. It is formed by winding the copper wires in contact with each other in a flat plate shape, and comprises the main air core coil unit 110 and the auxiliary coil unit 220 for generating and outputting an induced voltage by electromagnetic induction.

As described above, by implementing the primary-side coil element 100 to be wound in a flat plate shape so that the insulated coated copper wires come into contact with each other, unlike the conventional primary-side coil element of the PCB type, the resistance is low and heat generation is low (heat generation). Excellent characteristics), and also due to the skin effect in the copper wire (skin effect) there is an advantage that the transmission efficiency to the secondary side coil is improved.

For example, in the case of the conventional PCB substrate type primary side coil element, the transfer efficiency was 86%, but in the case of the primary side coil element 100 according to an embodiment of the present invention, it was confirmed that it is 89 to 90%.

In addition, as described above, by manufacturing the primary side coil element 100 into a hollow core without using a bobbin, the size of the primary side coil element 100 itself can be reduced.

In addition, the induced voltage output from the auxiliary coil unit 130 may be used to drive an IC device mounted on a main substrate (not shown).

Preferably in the transformer (A) according to an embodiment of the present invention, the cover 220, by pressing the primary coil element 100 mounted on the secondary coil element 210, the primary coil element ( 100) to hold.

In the transformer A according to an embodiment of the present invention, the main air core coil unit 110 is provided in contact with the central air holes 141a, 142a, 143a, 144a, and 145a so as to communicate with the first air core 110a. 146a) is formed, and the conductive shielding members 141, 142, 143, 144, 145, and 146 are formed in a flat plate shape to further shield EMI.

In the transformer (A) according to an embodiment of the present invention, the shielding member is provided in contact with the upper surface of the main core core coil unit 110, the central hole (141a) to communicate with the first core (110a); 143a and 145a are formed at the center, and are formed in a flat plate shape to contact the upper shield members 141, 143 and 145 of the conductive shielding the EMI and the lower surface of the main air core coil unit 110, and the first air core ( The central holes 142a, 144a, and 146a are formed at the center to communicate with 110a, and are formed of a flat lower shield member 142, 144, and 146 to shield EMI. The auxiliary coil unit 130 A contact is provided between the main air core coil unit 110 and the upper shielding member, or is provided between the main air core coil unit 110 and the lower shielding member so that the main air core coil unit 110 and the electromagnetic shield are inductive. Generates an induced voltage and outputs And that is characterized.

In the transformer A according to an embodiment of the present invention, the upper shielding member is provided in contact with an upper surface of the main core core coil part 110 and communicates with the first core core 110a so as to communicate with the first central hole (a). 141a is formed at the center, and is an upper shielding coil unit 141 for shielding EMI formed by contacting each other with an insulated coated copper wire and winding in a flat plate shape, and the lower shielding member is the main air core coil unit 110. EMI is formed by contacting the lower surface of the bottom surface, and having a second central hole 142a formed at the center thereof so as to communicate with the first hollow core 110a, and by winding the coated copper wire in contact with each other to form a flat plate. The lower shielding coil unit 142 is characterized in that.

As shown in FIG. 6, in the transformer A according to another embodiment of the present invention, the upper shielding member is provided in contact with an upper surface of the main air core coil unit 110, and the first air core 110a. The third center hole (143a) is formed in the center so as to communicate with each other, and is an upper shielding copper foil sheet 143 for shielding EMI, and the lower shielding member is provided with a contact on the lower surface of the main air core coil unit 110. And, the fourth central hole (144a) is formed in the center so as to communicate with the first hollow core (110a), characterized in that the lower shielding copper foil sheet 144 to shield the EMI.

The upper shielding copper foil sheet 143 and the lower shielding copper foil sheet 144 may be made of, for example, a thin copper plate or a copper tape (copper foil tape).

As shown in FIG. 7, in the transformer A according to an embodiment of the present invention, the upper shielding member is provided in contact with an upper surface of the main air core coil unit 110, and the first air core 110a. ) Is an upper shielding fiber sheet 145 shielding EMI having a fifth center hole 145a formed at the center thereof, and the lower shielding member is provided in contact with a lower surface of the main core core coil part 110. In order to communicate with the first hollow core 110a, the sixth central hole 146a may be a lower shielding fiber sheet 146 shielding the EMI formed in the center.

The upper and lower shielding fiber sheet 145 is composed of a fiber and a copper wire.

In the transformer (A) according to an embodiment of the present invention, the first through-hole 121a which is provided between the main air core coil unit 110 and the upper shielding member and communicates with the first air core 110a. The upper insulating sheet 121 formed in the center and the second through hole 122a which is provided between the main air core coil unit 110 and the lower shielding member and communicate with the first air core 110a are centered. A lower insulating sheet 122 is formed to be further included in the configuration, and the auxiliary coil unit 130 is provided in contact between the upper insulating sheet 121 and the upper shielding member or the lower insulating sheet 122 And a contact between the lower shielding member and the main concentric coil unit 110 to generate an induced voltage by electromagnetic induction and output the induced voltage.

According to this, there is an advantage that the insulation breakdown voltage can be further increased, the gap between the coil portions can be further narrowed, and the size of the product can be further downsized.

In the illustrated example, for example, the auxiliary coil 130 is provided in contact between the upper insulating sheet 121 and the upper shielding coil part 141.

The upper and lower insulating sheets 121 and 122 may be insulating films made of synthetic resin.

In the transformer A according to an embodiment of the present invention, the secondary coil element 210 is the secondary coil element 210 in a state in which the secondary coil element 210 and the cover 220 face each other. ) And holding members 231 and 232 which hold the primary coil element 100 so that there is no separation or clearance between the cover 220 and the cover 220.

The primary coil device 100 is characterized in that it is provided in the secondary coil device 210 and the cover 220 in a fixed position by the holding members (231,232).

Next, a specific configuration of the holding members 231 and 232 will be described.

In the transformer A according to an embodiment of the present invention, the holding members 231 and 232 may be configured such that the secondary coil element 210 and the lid coil 220 face each other. It is formed on at least one of the inner surface (210b, 220b) of the inner surface (210b) of the 210 or the inner surface (220b) of the lid 220, characterized in that for holding the primary coil element (100).

The inner surface 210b of the secondary coil element 210 may be referred to as an upper surface 210b based on the illustrated figure. Similarly, the inner surface 220b of the cover 220 may be referred to as the lower surface 220b based on the illustrated figure.

In the transformer A according to an embodiment of the present invention, the holding members 231 and 232 may be configured such that the primary coil element 100 is not eccentric with respect to the coil pattern portion 211b and is disposed in an up and down direction. It is characterized in that to hold the primary coil element 100 to be in the same position as (211b).

In the transformer A according to an embodiment of the present invention, the holding members 231 and 232 are protruded from the inner surface 210b of the secondary coil element 210, and the primary coil element 100 An inner protrusion 231 which contacts the inner circumferential surface 100a 'of the central through hole 100a and grasps the inner circumferential surface of the central through hole 100a of the primary coil element 100, and is spaced outwardly from the inner protrusion 231; An outer protrusion which protrudes from the inner surface 210b of the secondary coil element 210 and contacts the outer circumferential surface 100b of the primary coil element 100 to hold the outer circumferential surface 100b of the primary coil element 100. 232, the primary coil element 100 includes an inner surface 210b of the secondary coil element 210, an inner protrusion 231, an outer protrusion 232, and a lid 220. It is provided in the insertion space (S1) formed on the inner surface (220b), the primary coil element 100 is placed on the inner surface (210b) of the secondary coil element 210 It characterized in that the holding is sandwiched between the inner projection 231 and outer projections 232.

In addition, the inner protrusion 231 is formed to protrude in a rim shape. The outer protrusion 232 is formed to protrude in a rim shape.

In addition, the inner protrusion 231 and the outer protrusion 232 may be formed integrally with the insulating portion 212.

The inner protrusion 231 and the outer protrusion 232 may be integrally formed by the insulating part 212 and the insert molding.

In another embodiment, the inner protrusion 231 and the outer protrusion 232 may be formed by bonding the inner surface of the insulating portion 212 by an adhesive means. At this time, the adhesive means is, for example, adhesive, double-sided tape.

On the other hand, as a modified example, the inner protrusions may be formed discretely at intervals, and likewise the outer protrusions may be discretely formed at intervals, the primary coil element 100 regardless of the shape In any case, as long as the catches belong to the technical scope of the present invention.

In the transformer A according to an embodiment of the present invention, in order to firmly fix the primary coil element 100 inserted between the secondary coil element 210 and the cover 220, the secondary side Locking members (214, 224) (213a, 223a) for fastening the coil element 210 and the cover 220 to each other is characterized in that it is configured to further comprise.

The locking members (214, 224) (213a, 223a) is characterized in that the removable fitting.

The locking members 214 and 224 may be detachably fitted to the fitting grooves 214 and 213a formed in one side of the secondary coil element 210, and the fitting grooves 214 and 213a. It is characterized in that it comprises a fitting protrusion 224, 223a is formed to protrude on one side of the cover 220 to be coupled.

In the transformer A according to an embodiment of the present invention, the primary terminal hole 240a is formed, and the front end of the insulation part 212 (the opposite direction of the terminal) or the front end of the lid 220. The primary side terminal block 240 formed integrally with the insulation portion 212 or the cover 220 at at least one of the portions, and inserted into the terminal hole 240a of the primary side terminal block 240, and the primary coil A plurality of (eg four) primary side terminal pins P1 connected to the element 100, a plurality of (eg two) secondary side terminal pins P2 inserted and connected to the terminal 211a, and Insulated between the secondary side terminal pin P2 and the primary side (meaning the primary side coil element 100 and the magnetic core (not shown)) formed at the rear end of the insulation portion 212 perpendicular to the insulation portion 212. The cover 220 is formed at the rear end of the cover 220 so as to correspond to the plate-shaped first vertical plate 213 and the first vertical plate 213 to increase the distance. It is formed vertically to the second vertical plate 223 is characterized in that it is configured to further include.

In the transformer A according to an embodiment of the present invention, the rear end fitting groove 213a formed in the first vertical plate 213 is formed to protrude downward from the first vertical plate 213, The rear end fitting protrusion 223a is fitted to the rear end fitting groove 213a, and the rear end fitting groove 213a is fitted to the rear fitting protrusion 223a, thereby fastening the lid 220 to the secondary side. The coil element 210 is fixed, and the primary coil element 100 inserted between the secondary coil element 210 and the cover 220 is firmly held.

In the transformer (A) according to an embodiment of the present invention, the front end fitting groove 214 formed in the primary terminal block 240 and protrudes forward from the front end of the cover 220, the front end fitting A shear fitting protrusion 224 is fitted to the groove 214 is further included, the shear fitting groove 214 is fitted into the shear fitting protrusion 224, thereby fastening the lid 220 to the secondary coil element The 210 is fixed and the primary coil element 100 inserted between the secondary coil element 210 and the cover 220 is firmly held.

As described above, the rear end fitting groove 213a is fitted into the rear end fitting protrusion 223a, and at the same time, the front end fitting groove 214 is fitted into the front end fitting protrusion 224 in the front end, thereby closing the cover 220. The secondary coil element 210 can be fixed and detachably fitted in a stable and stable manner, and in particular, the primary coil element 100 can be stably held without further flow.

In the transformer (A) according to an embodiment of the present invention, the secondary terminal block formed integrally with the insulating portion 212 at the rear end of the insulating portion 212, and the secondary terminal hole 250a is formed ( 250 and the secondary terminal pin P2 are inserted into the terminal 211a and inserted into the secondary terminal hole 250a of the secondary terminal block 250.

The secondary terminal block 250 is characterized in that the protruded outward (rear) from the first vertical plate (213).

In addition, the secondary terminal block 250 is formed on the first vertical plate 213 so that the upper end of the secondary terminal block 250 contacts the terminal 211a, so that the secondary terminal block 250 is connected to the terminal. The secondary terminal pin P2 is fixed while supporting the 211a.

As described above, a preferred embodiment of the present invention has been described, and it is common knowledge in the art that the present invention may 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, the above-described embodiments should be understood as illustrative and not restrictive.

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

A: transformer according to an embodiment of the present invention
100: primary coil element
100a: center hole of primary coil element
100a ': inner circumferential surface of the primary coil element 100b': outer circumferential surface of the primary coil element
110: main air core coil unit 110a: first air core
121: upper insulating sheet 121a: first through hole
122: lower insulating sheet 122a: second through hole
130: auxiliary coil 130a: second core
141: upper shield coil portion 141a: first central hole
142: lower shield coil portion 142a: second central hole
210: secondary coil element 211: flat coil
211a: terminal 211b: coil pattern portion
210a: secondary side central hole 210b: inner surface of secondary side coil element
212: insulation 213: first vertical plate
213a: rear fitting groove 214: shear fitting groove
220: cover 220a: central through
220b: inner surface of the cover
231: inner projection 232: outer projection
223: second vertical plate 223a: rear end fitting
224: shear fitting protrusion S1: insertion space
240: primary terminal block 240a: primary terminal hole
P1: Primary terminal pin 250: Secondary terminal block
250a: secondary side terminal hole P2: secondary side terminal pin

Claims (4)

A flat coil 211 composed of a terminal 211a, a coil pattern portion 211b extending from the terminal 211a and formed into a flat spiral pattern, and a secondary side central hole 210a are formed. A secondary coil element 210 composed of an insulating part 212 made of a synthetic resin having a flat coil 211 excluding the terminal 211a,
A primary coil element 100 mounted on an inner surface 210b of the secondary coil element 210 to generate an induced current in the secondary coil element 210;
As the synthetic resin material having a central through hole 220a formed to correspond to the secondary side central hole 210a, the primary coil element 100 is placed in contact with the primary coil element 100 mounted on the secondary coil element 210. It comprises a cover 220 covering 100,
The primary side coil element 100,
A first air core 110a is formed at the center, and the main air core coil part 110 is formed by winding an insulating coated copper wire in contact with each other to form a flat plate,
A second air core 130a is formed at the center so as to be in contact with the main air core coil unit 110 and communicates with the first air core 110a, and is formed by winding an insulating coated copper wire in contact with each other to form a flat plate. The transformer is characterized in that it comprises a main coil core 110 and an auxiliary coil 220 for generating and outputting an induced voltage by electromagnetic induction.
The method according to claim 1,
Central holes 141a, 142a, 143a, 144a, 145a, and 146a are formed in contact with the main air core coil 110 and communicate with the first air core 110a, and are formed in a flat plate shape to provide EMI. A transformer comprising a conductive shielding member for shielding (141, 142, 143, 144, 145, 146) is further included.
The method according to claim 1 or 2,
1 so that the primary coil element 100 is not separated or spaced between the secondary coil element 210 and the cover 220 while the secondary coil element 210 and the cover 220 face each other. Transformer characterized in that it further comprises a holding member (231,232) for holding the vehicle side coil element (100).
The method according to claim 3,
The holding members (231, 232),
In the state in which the secondary coil element 210 and the cover 220 face each other, at least one of the inner surface 210b of the secondary coil element 210 or the inner surface 220b of the cover 220. And a transformer (210b, 220b) to hold the primary coil element (100).

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