KR101779071B1 - Transformer for LLC Circuit - Google Patents

Transformer for LLC Circuit Download PDF

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Publication number
KR101779071B1
KR101779071B1 KR1020150159426A KR20150159426A KR101779071B1 KR 101779071 B1 KR101779071 B1 KR 101779071B1 KR 1020150159426 A KR1020150159426 A KR 1020150159426A KR 20150159426 A KR20150159426 A KR 20150159426A KR 101779071 B1 KR101779071 B1 KR 101779071B1
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KR
South Korea
Prior art keywords
plate
coil
bobbin
guide plate
transformer
Prior art date
Application number
KR1020150159426A
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Korean (ko)
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KR20170056160A (en
Inventor
김명덕
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김명덕
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Priority to KR1020150159426A priority Critical patent/KR101779071B1/en
Publication of KR20170056160A publication Critical patent/KR20170056160A/en
Application granted granted Critical
Publication of KR101779071B1 publication Critical patent/KR101779071B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/288—Shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens

Abstract

The present invention relates to a transformer for an LLC circuit, and more particularly, to a transformer for an LLC circuit, which comprises a pin support which is integrally projected at both ends of a connection pin to which ends of a coil to be wound are connected, a lower winding portion formed on the pin support, A lower plate formed in the upper portion of the lower winding portion, a lower plate in the form of a plate spaced apart from the upper portion of the plate, an upper winding formed in the upper portion of the lower plate to wind the upper coil, A lower bobbin insertion groove formed in the upper and lower portions of the upper and lower windings, and a bobbin including a plate-shaped upper guide plate formed on an upper portion of the upper winding portion, And an insulating cover coupled to the bobbin.
According to the transformer for an LLC circuit of the present invention, a connection pin is provided at both ends of a pin support, a lower coil is wound around a lower coil provided at an upper portion of the pin support, and an upper coil is wound around the lower coil. The insulation cover covering the upper surface, the side surface, and the rear surface is fastened to the bobbin including the upper winding portion so as to surround the upper winding portion, thereby reducing the size of the bobbin constituting the transformer and reducing the voltage between the primary coil and the secondary coil It is possible to prevent electrical interference caused by the above-mentioned problems.

Description

[0001] Transformer for LLC Circuit [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LLC circuit transformer, and more particularly, to an LLC circuit transformer for isolating a primary side coil and a secondary side coil of an adjacent wound transformer to prevent electrical interference due to a voltage.

In general, a transformer is a device for changing the value of an AC voltage or an electric current by using an electromagnetic induction phenomenon. The basic structure of such a transformer is a coil composed of two or more pairs of coils (primary coil, secondary coil) And a bobbin that isolates each coil. By changing the winding of the coil being wound, the voltage on the primary side and the secondary side can be changed.

Such a transformer is used for various purposes in various industrial fields including television, radio, and communication equipment.

In recent years, with the development of flat panel display technology, a large number of LLC circuit transformers have been selected to realize a large display device, slimness, weight reduction, high power density, and reduced component cost in comparison with the product size. The transformer has a plurality of output structures on the secondary side.

Such a conventional LLC circuit transformer is constituted by installing a structure such as a primary coil and a bobbin which are spaced apart from each other inside the secondary coil.

However, such a conventional LLC circuit transformer has a problem that electric interference occurs between the primary coil and the secondary coil depending on the voltage.

Korean Patent Laid-Open Publication No. 10-2014-0087927

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a power supply device, which comprises a pin support provided at both ends of a connection pin, a lower winding part wound on a lower coil, Side and rear surfaces of the bobbin including the upper coil portion wound with the upper coil are wound so as to enclose the upper coil portion so as to reduce the size of the bobbin constituting the transformer, Which is capable of preventing electrical interference due to a voltage between the input terminal and the output terminal.

In order to achieve the above-described object, the transformer for an LLC circuit of the present invention includes a pin support which has a connection pin to which ends of a coil to be wound are connected and which is integrally protruded at both ends thereof, A lower plate portion formed on the upper portion of the lower coil portion, a lower plate portion formed on the upper portion of the lower plate portion, Shaped upper guide plate formed on the upper winding portion and a hollow bobbin insertion groove having a rear opening and a lower opening formed therein, and the bobbin insertion groove connects the lower guide plate, the upper winding portion, And an insulating cover coupled to the bobbin while inserting the upper guide plate.

The bobbin has a hollow hollow portion vertically penetrating the upper guide plate, the upper winding portion, the lower guide plate, the diaphragm, the lower winding portion, and the pin support. The insulating cover has a plate- A front insulator plate bent downward from a front end of the upper insulator plate, a side insulator plate bent from both ends of the upper insulator plate to the lower side, and a second insulator plate bent rearward at an end of the front insulator plate, Respectively, as shown in Fig.

The insulator cover may be slidably inserted into the gap between the lower guide plate and the diaphragm from the front to the rear and the front end of the diaphragm is connected to the front insulation plate of the insulation cover And the rear end of the diaphragm may be longer than the rear end of the upper guide plate or the lower guide plate.

A protruding tab protruding upward can be formed on the upper surface of the upper guide plate and a tab recess can be formed on the lower surface of the upper insulating plate so as to insert the protruding tab.

According to the LLC circuit transformer of the present invention as described above, it is possible to provide a transformer for an LLC circuit, which comprises a pin support provided at both ends of a connection pin, a lower winding portion wound on a lower coil provided on an upper portion of the pin support, Side and a rear surface of the bobbin are enclosed by a bobbin including an upper winding portion wound with an upper coil so as to enclose the upper winding portion so as to reduce the size of the bobbin constituting the transformer, There is an effect that electrical interference due to the voltage between the coils can be prevented.

1 is a perspective view of a transformer for an LLC circuit according to an embodiment of the present invention,
2 is a side view of a transformer for an LLC circuit according to an embodiment of the present invention,
3 is a side view showing a bobbin constituting a transformer for an LLC circuit according to an embodiment of the present invention,
4 is a side view showing an insulation cover constituting a transformer for an LLC circuit according to an embodiment of the present invention,
5 is a perspective view illustrating a transformer for an LLC circuit according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the present invention.

2, the horizontal direction is referred to as "longitudinal direction," the left direction is referred to as "front direction", the right direction as "rear direction", the vertical direction as "height direction", and the direction perpendicular to the ground as " do.

An LLC circuit transformer 100 according to an embodiment of the present invention includes a bobbin 110 and an insulating cover 150 slidingly coupled to the bobbin 110 as shown in FIGS. 1 and 2 .

3, the bobbin 110 includes a pin support 112 integrally formed with connection pins 111 at both ends thereof and a lower support member 112 formed at an upper portion of the pin support 112, A plate-shaped lower plate 113 formed on the upper portion of the lower winding 113, a plate-shaped lower guide plate 115 formed on the upper portion of the plate 114, An upper winding portion 116 formed on the upper portion of the guide plate 115 and having an upper coil C2 wound thereon and a plate shaped upper guide plate 117 formed on the upper portion of the upper winding portion 116 .

The rear end of the diaphragm 114 is longer than the rear end of the upper guide plate 117 or the lower guide plate 115.

The lower coil C1 wound on the lower winding part 113 is connected to the connection pin 111 provided on the front side of the pin support 112 and the upper coil C2 wound on the upper winding part 116 is connected to the pin And is connected to a connection pin 111 provided at the rear of the support base 112.

The bobbin 110 vertically penetrates the upper guide plate 117, the upper winding portion 116, the lower guide plate 115, the diaphragm 114, the lower winding portion 113 and the pin support 112, The hollow portion 119 of the electrode assembly is formed.

A protruding tab 118 protruding upward is formed on the upper surface of the upper guide plate 117.

The protruding tabs 118 may be formed on the front and rear sides of the hollow portion 119, respectively.

4, the insulating cover 150 includes a plate-shaped upper insulating plate 151 having a hollow groove 159 formed therethrough, a front insulating plate 153 bent downward from the front end of the upper insulating plate 151, A side insulating plate 152 which is bent at both ends in the width direction of the upper insulating plate 151 and a lower insulating plate 152 which is bent rearward at an end of the front insulating plate 153 and which faces the end of the side insulating plate 152 And an insertion plate 155 which is bent.

The insulating cover 150 has a box shape in which a rear bobbin insertion groove 154 is formed.

When the insulating cover 150 is coupled to the bobbin 110, the hollow portion 119 and the hollow groove 159 have the same cross-sectional area and communicate with each other.

The upper insulating plate 151 is formed with a tab groove 158 having an upper concave shape for inserting the protruding tabs 118 therein.

Like the protruding tabs 118, the tab grooves 158 may be formed at the front and rear sides spaced from the hollow grooves 159 in the longitudinal direction.

When the insulating cover 150 is coupled to the bobbin 110, the protruding tab 118 is inserted into the tab groove 158 so that the insulating cover 150 is not easily detached from the bobbin 110.

When the bobbin 110 and the insulating cover 150 are provided as described above, the lower coil C1 is wound on the lower winding part 113 so that the end of the lower coil C1 is connected to the connection pin 111 provided on the front of the pin support 112, And the upper coil C2 is wound on the upper winding portion 116 to connect the end portion to the connection pin 111 provided on the rear side of the pin support member 112. [

An insertion plate 155 bent in a direction opposite to the end of the side insulating plate 152 of the insulating cover 150 is inserted from the front to the rear in a gap formed between the lower guide plate 115 and the diaphragm 114 So that the insulating cover 150 is slidably engaged with the bobbin 110.

Next, a process of joining the core (not shown) through the hollow groove 159 and the hollow portion 119 is completed to complete the transformer.

When the insulating cover 150 is coupled to the bobbin 110, the bobbin insertion groove 154 is formed in the lower guide plate 115, The winding portion 116 and the upper guide plate 117 are inserted.

Since the front end of the diaphragm 114 is formed so as not to be longer than the front ends of the upper guide plate 117 and the lower guide plate 115, the front end of the diaphragm 114 is connected to the front insulating plate 153 of the insulating cover 150, And the rear end of the diaphragm 114 is longer than the rear end of the upper guide plate 117 or the lower guide plate 115 so that the rear end of the diaphragm 114 is longer than the rear end of the insulating cover 150 Resulting in a formed state.

Since the front insulating plate 153 of the insulating cover 150 is provided at the front of the upper winding portion 116 and is clogged with the front insulating plate 153, the lower coil C1 connected to the connection pin 111 provided in front of the pin support 112, Since the rear end of the diaphragm 114 is formed longer than the rear end of the insulating cover 150, it is possible to prevent the change in the electrical characteristics due to the influence of the voltage between the upper coil C2 and the upper coil C2, It is possible to minimize a change in electrical characteristics between the upper coil C2 and the lower coil C1 that are connected to the connection pin 111 due to a voltage effect.

In addition, since the front end length of the diaphragm 114 can be shortened, the overall size of the transformer is reduced.

According to the LLC circuit transformer of the present invention as described above, it is possible to provide a transformer for an LLC circuit, which comprises a pin support provided at both ends of a connection pin, a lower winding portion wound on a lower coil provided on an upper portion of the pin support, Side and a rear surface of the bobbin are enclosed by a bobbin including an upper winding portion wound with an upper coil so as to enclose the upper winding portion so as to reduce the size of the bobbin constituting the transformer, It is possible to prevent electrical interference due to the voltage between the coils.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It will be readily apparent that various substitutions, modifications, and alterations can be made herein.

110: bobbin 111: connecting pin
112: pin support 113: lower winding part
114: diaphragm 115: lower guide plate
116: upper winding section 117: upper guide plate
C1: lower coil C2: upper coil
150: insulating cover 154: bobbin insertion groove

Claims (4)

A pin support which is integrally protruded from both ends of a connection pin to which an end of the coil to be wound is connected; a lower winding section formed on the pin support and wound on the lower coil; Shaped upper guide portion formed on the lower guide plate and having an upper coil wound thereon, and a plate-shaped upper guide portion formed on the upper portion of the upper coil portion, A bobbin including a plate; And
A hollow bobbin insertion groove having a rear portion and a lower portion opened is formed, and the lower guide plate, the upper winding portion, and the upper guide plate are inserted into the bobbin insertion groove,
And a transformer for an LLC circuit. [2] The bobbin of claim 1, wherein the bobbin has a hollow hollow portion vertically penetrating the upper guide plate, the upper winding portion, the lower guide plate, the diaphragm, the lower winding portion and the pin support;
The insulating cover includes a plate-shaped upper insulating plate having a hollow groove formed therethrough, a front insulating plate bent downward from a front end of the upper insulating plate, a side insulating plate bent from both ends of the upper insulating plate, And an insertion plate bent backward from the end portion and bent in a direction opposite to the end portion of the side insulation plate, respectively. [Claim 2] The insulated cover according to claim 2, wherein the insulator is bent in a direction opposite to the end of the side insulated plate, and inserted into the gap between the lower guide plate and the diaphragm from front to back,
Wherein the front end of the diaphragm is in close contact with the front insulating plate of the insulating cover and the rear end of the diaphragm is longer than the rear end of the upper guide plate or the lower guide plate. [4] The LLC circuit transformer of claim 2, wherein protrusions protruding upward are formed on the upper surface of the upper guide plate, and upper grooves are formed on the lower surface of the upper insulation plate to insert the protrusions.
KR1020150159426A 2015-11-13 2015-11-13 Transformer for LLC Circuit KR101779071B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150159426A KR101779071B1 (en) 2015-11-13 2015-11-13 Transformer for LLC Circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150159426A KR101779071B1 (en) 2015-11-13 2015-11-13 Transformer for LLC Circuit

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KR20170056160A KR20170056160A (en) 2017-05-23
KR101779071B1 true KR101779071B1 (en) 2017-09-18

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024071471A1 (en) * 2022-09-28 2024-04-04 엘지전자 주식회사 Transformer and llc resonant converter comprising same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008187052A (en) 2007-01-30 2008-08-14 Fdk Corp High-voltage transformer
KR101124003B1 (en) 2011-12-19 2012-03-27 삼성전기주식회사 Transformer and flat panel display device using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008187052A (en) 2007-01-30 2008-08-14 Fdk Corp High-voltage transformer
KR101124003B1 (en) 2011-12-19 2012-03-27 삼성전기주식회사 Transformer and flat panel display device using the same

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