WO2024071554A1 - Transformateur et dispositif d'affichage le comprenant - Google Patents

Transformateur et dispositif d'affichage le comprenant Download PDF

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Publication number
WO2024071554A1
WO2024071554A1 PCT/KR2023/005587 KR2023005587W WO2024071554A1 WO 2024071554 A1 WO2024071554 A1 WO 2024071554A1 KR 2023005587 W KR2023005587 W KR 2023005587W WO 2024071554 A1 WO2024071554 A1 WO 2024071554A1
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WIPO (PCT)
Prior art keywords
core
bobbin
coil
disposed
transformer
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PCT/KR2023/005587
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English (en)
Korean (ko)
Inventor
정영환
류지창
손인성
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엘지이노텍(주)
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Publication of WO2024071554A1 publication Critical patent/WO2024071554A1/fr

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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
    • H01F27/24—Magnetic cores
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • 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
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers

Definitions

  • the present invention relates to a transformer and a display device including the same.
  • a driving power is required to drive an electronic device, and a power supply device, such as a power supply unit (PSU), is essentially employed to supply this driving power to the electronic device.
  • PSU power supply unit
  • the transformer occupies a relatively large volume compared to other components, so for slimming, it is common to omit elements that occupy a large thickness within the transformer or consider adjusting the quantity.
  • the transformer that forms the power supply unit of a recent flat panel display device the bobbin on which the primary and secondary coils are wound and fixed is omitted, or a plurality of slim transformers with low capacity are used.
  • the primary and secondary coils are spaced horizontally to meet the required leakage inductance value.
  • the distance between coils or the size of the core may also increase. Accordingly, additional adjustment of the leakage inductance value is required along with a decrease in the efficiency and workability of the transformer and an increase in the manufacturing cost.
  • the core size is larger than before, which may cause imbalance in back thickness or damage to the core after heat treatment for forming the core. This may cause heat generation when the transformer is driven, ultimately leading to a decrease in the efficiency of the transformer, and additional adjustment of the leakage inductance value is required.
  • the technical problem to be solved by the present invention is to provide a transformer using a core without loss of efficiency.
  • Another technical problem to be solved by the present invention is to provide a display device to which the above transformer is applied.
  • the transformer of the present invention for achieving the above technical problem includes a core portion including a first core and a second core disposed to be spaced apart from the first core; A coil unit including a primary coil and a secondary coil disposed to be spaced apart from the primary coil; and a bobbin portion at least partially coupled to the coil portion within the core portion, wherein each of the first core and the second core includes: an upper core; and a lower core disposed to face the upper core in a first direction, wherein each of the primary coil and the secondary coil has one side; a second side located on an opposite side of the one side and a second direction intersecting the first direction; It includes: a coil middle portion between the one side and the other side, wherein the bobbin portion includes a first end at which the one side of the coil portion is disposed; a second end located on an opposite side of the first end and the second direction, where the other side of the coil unit is disposed; and a bobbin middle portion disposed between the first end and the second end so that the coil middle
  • the bobbin unit includes a first bobbin including a first fastening part located in the middle of the bobbin; and a second fastening part coupled to the first fastening part and located in the middle of the bobbin, and a second bobbin facing the first bobbin in the second direction.
  • first fastening part and the second fastening part are characterized in that they are disposed between the first core and the second core.
  • the first bobbin may include a coil lead-out portion formed at the first end and configured to lead at least a portion of the primary coil.
  • each of the first core and the second core includes a midfoot portion; a first outer foot portion disposed to be spaced apart from the midfoot portion in a third direction intersecting each of the first and second directions; and a second outer foot located on an opposite side of the first outer foot in the third direction with the midfoot portion interposed therebetween, wherein each of the first bobbin and the second bobbin includes the first core and the second outer foot.
  • the midfoot portion of the core, the first outer foot portions of the first core and the second core, and the second outer feet portions of the first core and the second core each include through holes passing therethrough.
  • the first bobbin may include a first rib extending along the second direction on the outside of the secondary coil.
  • the secondary coil is disposed to be spaced apart from the primary coil in the third direction, the second bobbin extends from the second end toward the first end, and the primary coil portion and the 2 A 2-1 rib disposed between the primary coil portions; and a 2-2 rib extending from the second end toward the first end and disposed in an outer area of the secondary coil.
  • the first bobbin is characterized by including an inner receiving groove that accommodates at least a portion of the coil portion.
  • the bobbin part further includes a third bobbin, and the third bobbin part includes a third fastening part coupled to the first fastening part and the second fastening part; One side at least partially inserted into the inner receiving groove; and a seating support portion formed on one side and accommodating at least a portion of the coil portion.
  • the seating support portion may include a first seating portion where the primary coil is disposed; and a second seating portion where the secondary coil is disposed.
  • the third bobbin may include a third rib extending from the third fastening portion toward the seating support portion and disposed between the primary coil and the secondary coil.
  • the second seating portion is spaced apart in the first direction and protrudes from the side surfaces of the one side and the other side of the third bobbin in a third direction that intersects each of the first direction and the second direction. It is characterized by comprising a pair of supports.
  • the seating support portion is characterized in that at least a portion of the seat support portion is disposed in the inner receiving groove of the first bobbin.
  • first rib and the 2-2 rib are characterized in that at least a portion of the first rib overlaps each other in the second direction.
  • the 2-1 rib and the 2-2 rib are characterized in that at least a portion of the rib overlaps each other in the third direction.
  • first fastening part, the second fastening part, and the third fastening part are characterized in that at least a portion of the first fastening part overlaps each other in the first direction.
  • the overall thickness of the transformer can be reduced.
  • the problem that the overall rigidity of the transformer may be reduced due to the application of a divided core and the omission of the upper and lower surface structures of the bobbin can be solved by applying a bobbin structure with added ribs.
  • the separation distance between the primary coil and the secondary coil can be controlled by the rib applied to the bobbin, leakage inductance according to the separation distance between coils can be secured.
  • the withstand voltage of the transformer can be secured.
  • the overall rigidity of the transformer can be improved based on the increase in the strength of the winding form.
  • heat generation due to inductance deviation can be minimized by positioning the secondary coil in an inverted state, i.e., one end of the wire located on the inside is placed on the outside, and the other end of the wire located on the outside is placed on the inside.
  • the overturned secondary coil can be kept from lifting through the support part.
  • the flat panel display device including the above-described transformer can be slimmed compared to a typical bobbin with an upper plate by replacing the upper part of the bobbin part with a thin film-type coil fixing part.
  • FIG. 1 is a perspective view according to an embodiment of the transformer of the present invention
  • Figure 2 is an exploded perspective view of Figure 1;
  • Figure 3 is a bottom perspective view of Figure 1;
  • Figure 4 is an exploded perspective view of the bottom of Figure 3;
  • 5A is a plan view showing a transformer having segment cores of equal size divided by equal separation distances according to the present invention
  • Figure 5b is a plan view showing a transformer having segment cores of the same size divided by different separation distances according to the present invention
  • Figure 5c is a plan view showing a transformer having segment cores of different sizes divided by equal spacing according to the present invention.
  • 5D is a plan view showing a transformer having segment cores of different sizes divided by different spacing distances according to the present invention.
  • Figure 6 is an exploded perspective view of the bobbin portion according to the present invention.
  • Figure 7a is a plan view showing the bobbin part according to the present invention.
  • Figure 7b is a cross-sectional view of portion A-A of Figure 7a;
  • Figure 7c is a cross-sectional view of portion B-B of Figure 7a;
  • Figure 7d is a cross-sectional view of portion C-C of Figure 7a;
  • Figure 8 is a perspective view showing the core portion removed from the transformer of the present invention.
  • Figure 9 is a perspective view showing a state in which the first bobbin in Figure 8 is removed;
  • Figure 10 is a perspective view showing a state in which the secondary coil portion is composed of two rows in Figure 9;
  • FIG. 11 is a perspective view showing a third bobbin according to the present invention.
  • FIG. 12A is a plan view of the shape of the secondary coil wound on the seating support portion of the primary bobbin in the embodiment shown in FIG. 9, viewed from the x-axis direction;
  • Figure 12b is an example showing the arrangement of the secondary coil within the core in an embodiment in which the secondary coil consists of one row;
  • FIG. 13A is a plan view of the shape of the secondary coil wound on the seating support portion of the primary bobbin in the embodiment shown in FIG. 10, viewed from the x-axis direction;
  • Figure 13b is an example diagram showing the state in which the secondary coil is arranged inside the core in an embodiment in which the secondary coil is composed of two rows.
  • each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern.
  • the description of being formed includes all being formed directly or through another layer. The standards for top/top or bottom/bottom of each floor are explained based on the drawing. Additionally, the thickness or size of each layer (film), region, pattern, or structure in the drawings may be modified for clarity and convenience of explanation, and therefore does not entirely reflect the actual size.
  • the thickness (vertical height) of the transformer according to the present invention to contribute to slimming of the display device is 14 mm or less from the top surface of the circuit board, preferably. It may be 12 mm or less, more preferably 10 mm or less.
  • Figure 1 is a perspective view according to an embodiment of the transformer of the present invention
  • Figure 2 is an exploded perspective view of Figure 1
  • Figure 3 is a bottom perspective view of Figure 1
  • Figure 4 is an exploded bottom perspective view of Figure 3
  • Figure 5a is the main perspective view.
  • Figure 5b is a plan view showing a transformer having segment cores divided into different separation distances according to the present invention
  • Figure 5c is a plan view showing a transformer according to the present invention.
  • It is a plan view showing a transformer having segment cores of different sizes divided by the same separation distance
  • Figure 5d is a plan view showing a transformer having segment cores of different sizes divided by different separation distances according to the present invention.
  • the transformer of the present invention may be configured to include a core portion 100, a coil portion 200, and a bobbin portion 300.
  • the core portion 100 has the characteristics of a magnetic circuit and can serve as a passage for magnetic flux.
  • the core portion 100 may include an upper core 110 and a lower core 120.
  • the upper core 110 includes a first upper core 110-1 and a second upper core 110-2
  • the lower core 120 includes a first lower core 120-1 and a second lower core ( 120-2) may be included.
  • the first upper core 110-1 and the first lower core 120-1 are the first core
  • the second upper core 110-2 and the second lower core 120-2 are the second core.
  • the upper core 110 and lower core 120 may be divided in a first direction (x-axis direction), and the upper core 110 and lower core 120 may be combined to form one core portion 100. You can.
  • the upper core 110 can be defined as the core located furthest from the upper surface of the circuit board described above in the first direction
  • the lower core 120 can be defined as the core located closest to the upper surface of the circuit board in the first direction.
  • the upper core 110 and the lower core 120 may have a shape that is symmetrical to each other up and down, that is, in the first direction, or may have an asymmetric shape. However, in the following description, it is assumed that the shape is vertically symmetrical for convenience of explanation.
  • the upper core 110 and lower core 120 can each be divided into a plurality of segment cores. That is, as shown in FIGS. 1 to 4, the upper core 110 and the lower core 120 can be segmented into first cores and second cores in the y-axis direction, respectively. At this time, the lengths of the first core and the second core in the y-axis direction may be the same.
  • the concept is that the length of each core in the y-axis direction is ‘the same.’ Considering the tolerances that occur during the molding and processing of each core, the y-axis length between each core is less than 1%. They can be considered to be included in the same category as each other.
  • the length of the first upper core 110-1, the second upper core 110-2, the first lower core 120-1, and the second lower core 120-2 in the y-axis direction is the same. And at this time, the allowable deviation of the lengths in the y-axis direction may be less than 1%.
  • the upper core 110 and lower core 120 may each be divided into three segment cores. Of course, it is natural that division into three or more is possible. Additionally, although not shown, only the upper core 110 may be divided into a plurality of segment cores, or only the lower core 120 may be divided into a plurality of segment cores.
  • the number of segment cores of the upper core 110 and the number of segment cores of the lower core 120 may be arranged differently.
  • the segment core sizes of the upper core 110 and lower core 120 may be arranged differently.
  • the y-axis direction lengths of each of the divided upper cores 110 may be configured to be equal to each other, or each of the divided upper cores 110 may be configured as shown in FIGS. 5C and 5D.
  • the lengths in the y-axis direction may be configured to be different from each other, and the respective separation distances between the divided upper cores 110 may be arranged the same or different from each other.
  • the core portion 100 may be divided in a second direction (y-axis or z-axis direction) that intersects the first direction (x-axis direction) as shown, and hereinafter, for convenience, the z-axis direction is Let's call it the third direction.
  • the minimum separation distance sd110 between the divided upper cores 110 is the distance between the divided upper cores 110 in the second direction of the first upper core 110-1.
  • the sum of the length and the length of the second upper core 110-2 in the second direction may be defined as follows [Equation 1].
  • the minimum separation distance (sd110) between the plurality of upper segment cores exceeding '0%' means that there is an air gap in the state where the first upper core 110-1 and the second upper core 110-2 are divided. This may mean that they are spaced apart from each other by a minimum distance with an air gap in between.
  • a fastening part (CP) which will be described later, is omitted in the space where the first upper core 110-1 and the second upper core 110-2 are spaced apart from each other, or the first upper core (110-1) ( This may mean that the fastening portion is covered by the second upper core 110-1) and the second upper core 110-2.
  • the upper core 110 can increase the leakage inductance value by applying a divided core.
  • the minimum separation distance sd110 between the plurality of upper segment cores is the sum of the length of the first upper core 110-1 in the second direction and the length of the second upper core 110-2 in the second direction. From the point where it exceeds '0%', that is, when the first upper core 110-1 and the second upper core 110-2 are divided, an additional leakage inductance value is generated, and as the separation distance increases, the leakage The inductance value also increases at the same time.
  • the minimum separation distance between the plurality of upper segment cores exceeds 8.75% of the sum of the length of the first upper core 110-1 in the second direction and the length of the second upper core 110-2 in the second direction.
  • the coil resistance value that is, the direct current resistance (DCR) value increases, which reduces the efficiency of the transformer.
  • the present invention since the present invention has a structure that omits the upper and lower surfaces of the bobbin portion, bobbin rigidity can be increased through the arrangement of a plurality of ribs, which will be described later. Therefore, when applying the structure of the fastening portion (CP) formed by fastening a plurality of rib ends, the rigidity of the bobbin can be further increased.
  • the length of the fastening portion CP in the second direction that is, the distance between the first upper core 110-1 and the second upper core 110-2, can be configured to be at least 0.1 mm.
  • the minimum separation distance (sd120) between the divided lower cores 120 is also the length of the first lower core 120-1 in the second direction and the second lower core 120-2.
  • sd120 the minimum separation distance between the divided lower cores 120, that is, between the plurality of lower segment cores, is also the length of the first lower core 120-1 in the second direction and the second lower core 120-2.
  • Equation 2 the sum of the lengths in the second direction.
  • the lower core 120 has a structure that faces the upper core 110 in the first direction, and the description of the minimum separation distance between the plurality of lower segment cores is the description of the minimum separation distance between the upper segment cores described above. You can refer to .
  • the minimum separation distance between each segment core of the upper core 110 or lower core 120 may be, for example, 0.1 mm or more and 7 mm or less, and preferably 0.5 mm or more and 5 mm or less. there is.
  • the separation distance between the upper core 110 and the lower core 120 increases, the value of the leakage inductance increases, but when the separation distance exceeds 5 mm, the leakage inductance value becomes saturated.
  • the separation distance exceeds 7 mm the coil resistance value increases due to an increase in the second direction winding length, which reduces the efficiency of the transformer. Therefore, the separation distance can be designed up to 7 mm, but considering the leakage inductance value, it can be designed up to 5 mm. It is desirable to configure
  • a part of the bobbin portion 300 may be placed in the space spaced between the upper core 110 and the lower core 120, so that the space between the upper core 110 and the lower core 120
  • the separation distance can also be understood as the thickness of the fastening part (CP). Therefore, in order to secure the rigidity of the bobbin portion 300 for supporting the upper core 110 and lower core 120, it is desirable to secure a separation distance of at least 0.5 mm or more between the upper core 110 and lower core 120. do.
  • the rigidity of the bobbin unit 300 can be secured, but as the separation distance exceeds 5 mm, the coil increases as the second direction winding length increases. As the resistance value increases, the efficiency of the transformer may decrease.
  • the separation distance between the upper core 110 and the lower core 120 is 0.5 mm or more and 5 mm or less.
  • the transformer applied to the present invention is for finely controlling the leakage inductance, and as described above, the leakage inductance can be adjusted by configuring the core portion 100 not as one but as a plurality of segment cores. In other words, a clearance distance is created between the divided cores, and through this, the electrical characteristics of the transformer can be finely adjusted.
  • the leakage inductance can be adjusted by configuring the upper core 110 and the lower core 120 to have different thicknesses (lengths in at least one direction among the x-axis, y-axis, and z-axis).
  • the core portion 100 can be manufactured by dividing it, for example, when used in a large-capacity transformer applied to a large-capacity TV, heat generation due to core shape imbalance can be controlled and the product yield of the core can be improved.
  • a portion of the bobbin portion 300 may be disposed between the plurality of divided segment cores. It is possible to keep the space between the divided segment cores empty, but by placing a fastening part (CP) between the divided segment cores, when using a transformer, the segment cores come into contact with each other, causing chipping or cracks in the core. You can prevent problems from occurring. Therefore, it is desirable to place a portion of the bobbin portion 300 between the divided segment cores, and for example, a fastening portion CP may be disposed. Although not shown, the fastening part CP may be divided into an upper fastening member and a lower fastening member.
  • the upper fastening member may be disposed in a divided area between the first upper core and the second upper core, and the lower fastening member may be disposed in a divided area between the second lower core and the second lower core.
  • the positions of the upper fastening members and the lower fastening members may at least partially overlap each other in the first direction. More preferably, the width of the upper fastening member in the second direction and the width of the lower fastening member in the second direction may correspond to each other and overlap each other in the first direction.
  • a first outer foot 111 that protrudes downward in the first direction and extends along the second direction may be disposed on one side of the upper core 110 in the third direction.
  • a second outer foot 112 that protrudes downward in the first direction and extends along the second direction may be disposed on the other side of the upper core 110 in the third direction.
  • a midfoot portion 113 that protrudes downward in the first direction and extends along the second direction may be disposed between the first outer foot portion 111 and the second outer foot portion 112.
  • the first outer foot portion 111, the second outer foot portion 112, and the midfoot portion 113 may be arranged parallel to each other.
  • first outer foot 111, the second outer foot 112, and the midfoot 113 in the z-axis direction may be the same or different.
  • a first outer foot portion 121, a second outer foot portion 122, and a midfoot portion 123 may be disposed in the lower core 120 to face the upper core 110.
  • the core portion 100 may further include a first space 130 and a second space 140.
  • the first space 130 is formed between the first outer foot portions 111 and 121 and the midfoot portions 113 and 123, and can accommodate a portion of the coil portion 200 and the bobbin portion 300, which will be described later.
  • the second space 140 is formed between the second outer foot portions 112 and 122 and the midfoot portions 113 and 123, and is located on the opposite side of the z-axis of the portion of the coil portion 200 and bobbin portion 300, which will be described later.
  • the placed tabu can be accommodated. Accordingly, the first space 130 and the second space 140 may be formed to correspond to the thickness and spacing of the portion and other portions of the coil portion 200 and the bobbin portion 300 that are accommodated.
  • the inductance of the core portion 100 can be controlled by adjusting the sizes of the first space 130 and the second space 140, and the transformer is adjusted according to the number of the first space 130 and the second space 140. Heat generation can be controlled.
  • the core portion 100 may include a magnetic material, for example, iron or ferrite, but is not limited thereto.
  • the coil unit 200 may include a primary coil 210 and a secondary coil 220.
  • the primary coil 210 and secondary coil 220 may have different thicknesses. At this time, the primary coil 210 and the secondary coil 220 may each have the same thickness.
  • At least a portion of the primary coil 210 may be arranged in a donut shape within the core portion 100. That is, as described above, a portion and other portions of the primary coil 210 may be accommodated in the first space 130 and the second space 140.
  • the primary coil 210 can secure the withstand voltage of the transformer by applying an insulating coated wire.
  • withstand voltage requires a certain multiple of the operating voltage of the relevant component. Accordingly, in the case of parts wound using conventional USTC wires, an insulation distance is created to satisfy the withstand voltage, thereby securing the withstand voltage. At this time, the insulation distance that must be secured is determined by the standard.
  • the required withstand voltage of a transformer called 'A' that is, the withstand voltage between the primary and secondary coils is 4 kV or more
  • the primary coil must be It must be designed so that the shortest distance between the coil and the secondary coil is 4 mm or more.
  • the parts mentioned here are made using USTC wire, PCB, and copper plates.
  • each wire was coated with an insulating resin multiple times to ensure that each wire was electrically independent, thereby securing and strengthening the withstand voltage characteristics.
  • the cross section of the insulating coated wire applied to the present invention is not shown, but the surface of each wire is coated with two or more layers, preferably three or more layers of insulating resin, which can strengthen the withstand voltage and increase the overall strength of the winding form. , Based on this, the overall rigidity of the transformer can also be improved.
  • the secondary coil 220 is disposed along the outer circumferential direction in the winding direction of the primary coil 210, and has a portion and other portions together with the primary coil 210 in the first space 130 and the second space 140. It can be accepted.
  • the secondary coil 220 may be wound by arranging a plurality of secondary windings in a single layer or multiple layers.
  • the secondary coil 220 can be wound by turning the entire coil over once, and a detailed description of this will be provided later.
  • the coil unit 200 is wound around the bobbin unit 300 in a donut shape, and at least a portion of the coil unit 200 may be disposed within the core unit 100 .
  • Figure 6 is an exploded perspective view of the bobbin part according to the present invention
  • Figure 7a is a plan view showing the bobbin part according to the present invention
  • Figure 7b is a cross-sectional view of part A-A of Figure 7a
  • Figure 7c is a cross-sectional view of part B-B of Figure 7a
  • FIG. 7D is a cross-sectional view of portion C-C of FIG. 7A.
  • the bobbin unit 300 will be described with reference to FIGS. 6 to 7 (FIGS. 7A to 7D) along with FIGS. 2 and 4.
  • the first direction is shown with respect to FIG. 6.
  • the x-axis direction the second direction is called the y-axis direction
  • the third direction is called the z-axis direction
  • the upper left diagonal direction in the y-axis direction is called one side or one end
  • the opposite y-axis direction is called the lower right diagonal direction as the other side.
  • the upper part of the x-axis direction is called upper, top, and upper side
  • the lower part of the x-axis direction is called lower, lower, and lower side.
  • the bobbin portion 300 is a part where the core portion 100 and the coil portion 200 are coupled, and the first end (FP) is disposed on one side in the second direction and the second end (SP) is disposed on the other side.
  • a bobbin middle portion (drawing number not shown) may be disposed between the first end (FP) and the second end (SP). Therefore, the remaining portion excluding the first end (FP) and the second end (SP) can be understood as the bobbin middle portion.
  • the core portion 100 may be disposed in at least a portion of the middle portion of the bobbin.
  • the bobbin unit 300 may be composed of a plurality of pieces, for example, three pieces. That is, the bobbin unit 300 may include a first bobbin 310, a second bobbin 320, and a third bobbin 330.
  • the first end FP disposed on one side of the first bobbin 310 has a rectangular parallelepiped shape and an inner receiving groove 314 may be formed in one side of the second direction.
  • a coil draw-out portion 312 may be formed on the upper portion of the inner receiving groove 314, that is, on the upper surface of the first end FP in the first direction.
  • the coil draw-out unit 312 may be composed of a plurality, for example, of two.
  • the coil draw-out portion 312 may be configured in the form of a groove formed in one direction on the other side of the upper surface of the first end FP, and the end in one direction is bent in the third direction (z-axis direction) to extend a predetermined length. can be formed.
  • the coils may be bent in opposite directions to extend a predetermined length.
  • the coil draw-out portion 312 may facilitate drawing and fixing the first bobbin 310 upward in the x-axis direction with respect to the end of the conductive wire constituting the primary coil 210.
  • the coil lead-out portion 312 is an area where the end of the conductive wire of the primary coil 210 is disposed, and may be described interchangeably with the first terminal portion.
  • the end of the conductive wire of the primary coil 210 that passes through the coil lead-out portion 312 is disposed at a position lower than the maximum height of the upper core 110, which can contribute to slimming the transformer.
  • the coil unit 200 may also be composed of a first end, a second end, and a coil middle part corresponding to the bobbin unit 300, and the first end of the coil unit 200 is the first end of the bobbin unit 300. It can be placed by inserting into the end portion (FP), that is, the inner receiving groove 314.
  • a first fastening member 311 may be disposed on the other side of the first bobbin 310.
  • the first fastening member 311 includes two horizontal frames spaced apart in a first direction and extending along a third direction, and two frames respectively connected in the first direction from both ends of the two horizontal frames. It may be configured in the form of a quadrangular frame that is combined to form a hole in the second direction. At this time, support protrusions 311-2 may be formed at the lower portions of both inner sides of the quadrangular frame. Some of the secondary coils 220 may be seated on the support jaw 311-2.
  • the width formed in the second direction of the first fastening member 311 may correspond to the width between divided segment cores.
  • both sides of the first fastening member 311 in the third direction may form a seating groove 311-1 from the other side in the second direction to one side.
  • both sides of the inner receiving groove 314 in the third direction and both sides of the first fastening member 311 in the third direction may be connected by a first rib 313, and the vertical thickness of the first rib 313 in the first direction is may correspond to or be greater than the thickness of the coil portion 200.
  • the second bobbin 320 may have a second fastening member 321 formed on one side, and a coil support portion 325 for inserting/extracting the primary coil 210 and the secondary coil 220.
  • the coil support portion 325 is an area where the end of the secondary coil 220 is disposed and may be described interchangeably with the second terminal portion. At this time, the other side of the primary coil 210 may be placed below the coil support part 325.
  • the second fastening member 321 may be arranged to be inserted into the square frame of the first fastening member 311.
  • the second fastening member 321 includes an upper frame 321-1 extending from the top in the first direction to the third direction, and a support piece extending from both sides of the upper frame 321-1 in the third direction to the bottom in the first direction ( 321-2) may be included.
  • the upper frame 321-1 is disposed on the inner upper part of the square frame, and the support piece 321-2 is located in the seating groove 311. -1) can be supported by contact.
  • both sides of the coil supporter 325 in the third direction and both sides of the second fastening member 321 in the third direction may be connected to each other by 2-2 ribs 323, and each 2-2 rib
  • the 2-1 rib 322 may be disposed at a certain distance inward from 323 in the third direction.
  • the constant interval may be an interval corresponding to the width of the secondary coil 220 in the third direction.
  • the vertical thickness of the 2-1 rib 322 and the 2-2 rib 323 in the first direction may also correspond to or be greater than the vertical thickness of the coil portion 200 in the first direction.
  • a first fastening means 321-3 in the form of a hook extending toward the other lower side may be formed on the upper frame 321-1.
  • the third bobbin 330 may have a seating support portion 333 formed on one side in the second direction and a third fastening portion 331 formed on the other side in the second direction.
  • the seating support portion 333 is a portion that is inserted into the inner receiving groove 314 of the first bobbin 310 while one side of the coil portion 200 in the second direction is seated and supported. Accordingly, the vertical thickness of the seating support portion 333 in the first direction may be configured in consideration of the vertical length of the inner receiving groove 314 in the first direction.
  • the seating support portion 333 may include a first seating portion 333-1, a second seating portion 333-2, a support portion 333-3, and a guide bar 333-4.
  • the second seating portion 333-2 it is not visible from the angle in the drawing of FIG. 6, so it can be confirmed with reference to FIG. 11.
  • the first seating portion 333-1 is a portion where one side of the primary coil 210 in the second direction is seated and supported while maintaining the donut-shaped winding form, and has a shape corresponding to the shape of one side of the primary coil 210. It can be configured.
  • the second seating portion 333-2 is a portion in which one side of the secondary coil 220 that maintains the winding shape in the second direction is contacted and supported while being wound.
  • the second seating portion 333-2 is a portion of the secondary coil 220 that maintains the winding shape. ) can be formed to have a radius corresponding to one side of.
  • the secondary coil 220 may be coupled to the second seating portion 333-2 in an entirely inverted state, and the structure in which the secondary coil 220 is seated in an inverted state will be described later.
  • the first seating portion 333-1 and the second seating portion 333-2 may be inserted into the inner receiving groove 314 of the first bobbin 310.
  • the third fastening part 331 may be inserted into the square frame of the first fastening member 311.
  • the third fastening part 331 may be inserted into the square frame of the first bobbin 310 in a state of fastening with the second fastening member 321 of the second bobbin 320. That is, the third fastening part 331 includes a lower frame 331-1 extending from the lower part of the first direction in the third direction, and extends from the center area of the lower frame 331-1 to the upper first direction.
  • a second fastening means 331-2 in the form of a hook extending to one side in the second direction may be formed.
  • the second fastening means 331-2 may be combined with the first fastening means 321-3 of the second bobbin 320 and disposed inside the square frame of the first fastening member 311. Additionally, a groove may be formed at the bottom of the second fastening means 331-2.
  • the first fastening member 311, the second fastening member 321, and the third fastening part 331 combined with each other may form a fastening part CP.
  • the length extending in the third direction of the lower frame 331-1 may correspond to the distance between the 2-1 ribs 322.
  • a third rib 332 is disposed extending in the second direction between the third fastening portion 331 and the seating support portion 333, and the third rib 332 is the 2-1 rib 322 along the second direction. and at least a portion may overlap in a third direction.
  • the bobbin part 300 including the above-described first bobbin 310, second bobbin 320, and third bobbin 330 is combined, it can be configured as shown in Figure 7a, and Figure 7a shows the bobbin according to the present invention. It shows the rich and poor 300 looking down from the top.
  • the bobbin unit 300 has the first end (FP) of the first bobbin 310 disposed on one side (left side) in the second direction, and the first end (FP) of the first bobbin 310 is disposed on the other side (right side) in the second direction. ), the second end (SP) may be disposed, and it is natural that the arrangement positions of the first end (FP) and the second end (SP) may be changed.
  • a bobbin middle portion may be disposed between the first end FP where the inner receiving groove 314 is formed and the second end SP including the coil support portion 325.
  • the bobbin middle portion may be composed of a plurality of ribs 313, 322, 323, and 332 and a fastening portion (CP).
  • first fastening member 311 is shown at the angle of the drawing, but it can be understood that the second fastening member 321 and the third fastening part 331 are coupled and disposed on the bottom of the first fastening member 311. You can. Meanwhile, the first fastening member 311 may form the overall skeleton of the fastening portion CP.
  • the plurality of ribs 313, 322, 323, and 332 may include a first rib 313, a 2-1 rib 322, a 2-2 rib 323, and a third rib 332, The explanation will be based on FIG. 7A.
  • the first ribs 313 may extend in the y-axis direction between the first end FP and the fastening portion CP and be arranged parallel to each other in the z-axis direction.
  • the 2-2 rib 323 extends in the y-axis direction between the second end (SP) and the fastening portion (CP) and is parallel to each other in the z-axis direction. They may be arranged so that at least part of them overlaps with the first rib 313 in the y-axis direction.
  • the 2-1 rib 322 may be arranged to be spaced apart from the 2-2 rib 323 in the inward direction and parallel to the z-axis at regular intervals, between the second end SP and the fastening portion CP. It can be arranged to extend in the y-axis direction. At this time, the 'constant interval' may be an interval corresponding to the width of the secondary coil 220 in the z-axis direction.
  • the third rib 332 may be arranged to be spaced apart from the first rib 313 in the inward direction at regular intervals parallel to the z-axis, and in the y-axis direction between the first end FP and the fastening portion CP. It can be extended and placed. At this time, the third rib 332 may at least partially overlap the 2-1 rib 322 in the y-axis direction.
  • first rib 313 and the third rib 323 overlap each other at least partially in the z-axis direction, and the 2-1 rib 322 and the 2-2 rib 323 overlap at least in the z-axis direction. Some may overlap with each other.
  • the plurality of ribs (313, 322, 323, 332) described above may be disposed in the x-axis direction while forming through holes (315, 324, 326, 334), and the through holes (315, 324, 326, 334)
  • the first outer foot portions 111 and 121, the second outer foot portions 112 and 122, and the midfoot portions 113 and 123 of the above-described core portion 100 may be disposed while penetrating. Accordingly, the first rib 313 and the third rib 332 of the bobbin portion 300 are accommodated in the first space 130 of the above-described first core, and the second space 140 of the first core is also accommodated.
  • the first rib 313 and the third rib 332 can be accommodated.
  • the 2-2 rib 323 and the 2-1 rib 322 are accommodated in the first space 130 of the second core, and the 2-2 rib is also accommodated in the second space 140 of the second core. (323), it can be understood that the 2-1 rib (322) is accepted.
  • FIGS. 7B to 7D are cross-sectional views of portions A-A, B-B, and C-C of FIG. 7A, showing the connection state and structure of the fastening portion CP.
  • the third fastening part 331 connected to the third bobbin 330 may include a lower frame 331-1 and a second fastening means 331-2.
  • the second fastening member 321 connected to the second bobbin 320 may include an upper frame 321-1 and a first fastening means 321-3.
  • the first fastening means 321-3 may be a groove formed from the center of the upper frame 321-1 in the z-axis direction to the lower part in the x-axis direction, and the end of the formed groove is directed to the other side in the y-axis direction (right side in Figure 7b) May include bent shapes.
  • the second fastening means 331-2 is disposed at the center of the lower frame 331-1 in the z-axis direction and extends upward in the x-axis direction, and the extended end is bent to one side in the y-axis direction (left side in Figure 7b). May include shapes.
  • the lower end of the second fastening means 331 may be formed with a groove to accommodate the end bent toward the other side of the groove in the y-axis direction (right side in FIG. 7B) of the first fastening means 321-3. That is, as shown in the enlarged view of FIG.
  • the first fastening means 321-3 and the second fastening means 331-2 are crossed in a staggered state and supported in contact with each other, and are attached to the first fastening member 311. It can be arranged so that the upper and lower parts in the x-axis direction are surrounded.
  • an end of one side (left side of FIG. 7C) in the y-axis direction of the 2-1 rib 322 may be formed to be inclined.
  • the other end of the third rib 332 in the y-axis direction (right side in FIG. 7C) may be formed to be inclined to correspond to the end of the second-1 rib 322 in the y-axis direction. That is, as shown in the enlarged view of Figure 7c.
  • the 2-1 rib 322 and the third rib 332 may be arranged with the inclined surfaces of each end in contact with each other and the upper and lower portions in the x-axis direction surrounded by the first fastening member 311.
  • each rib is formed in a direction opposite to the inclination shown in FIG. 7C so that the ends of each rib come into contact with each other.
  • the 2-1 rib 322 and the third rib 332 may be arranged to overlap at least part of the y-axis direction.
  • a first fastening member 311 may be formed at the end of the other side (right side of FIG. 7D) in the y-axis direction of the first rib 313.
  • a seating groove 311-1 open toward the other side in the y-axis direction may be formed at the upper and lower portions of the first fastening member 311 in the z-axis direction.
  • support pieces 321-2 inserted and supported in the seating grooves 311-1 in the upper and lower parts in the z-axis direction will be formed, respectively. You can.
  • the bobbin portion 300 forms through holes 315, 324, 326, and 334 in the x-axis direction in the middle portion of the bobbin, excluding the first end (FP) and the second end (SP), so that Although it has a structure in which the upper and lower surfaces are omitted, the overall rigidity of the bobbin portion 300 can be maintained and improved by applying the multiple ribs 313, 322, 323, and 332 and the fastening portion (CP) structure described above. You can.
  • Figure 8 is a perspective view showing a state in which the core portion is removed from the transformer of the present invention
  • Figure 9 is a perspective view showing a state in which the first bobbin is removed in Figure 8
  • Figure 10 is a perspective view showing a state in which the secondary coil is composed of two rows in Figure 9.
  • Figure 11 is a perspective view showing the third bobbin according to the present invention
  • Figures 8 to 11 are shown to show the arrangement structure and coupling state of the coil part disposed in the bobbin part applied to the present invention.
  • the coil unit 200 consisting of the primary coil 210 and the secondary coil 220 is formed at the first end (FP) of the bobbin unit 300 while maintaining the winding form in a donut shape. ), one end (lower left diagonal direction) may be disposed, and the other side (upper right diagonal direction) end may be disposed at the second end SP of the bobbin unit 300.
  • the coil middle portion excluding the one end and the other end of the coil portion 200 is the bobbin middle portion of the bobbin portion 300, that is, the first end (FP) and the second end (SP) of the bobbin portion 300.
  • the primary coil 210 is disposed in the bobbin unit 300 while maintaining the winding form in a donut shape along the y-axis plane, and the secondary coil 220 is located around the outer periphery of the primary coil 210 in the winding direction. Accordingly, it can be placed while maintaining the winding form. That is, the primary coil 210 has a width corresponding to the width in the z-axis direction of the first fastening means 321-3 and the second fastening means 331-2 and is wound in a donut shape to form the primary coil 210.
  • the secondary coil 220 is connected to the outer circumference of the primary coil 210 in the winding direction, that is, one end of the secondary coil 220 is inside the first end FP of the bobbin unit 300.
  • the 2-1 rib 322 and the third rib 332 are disposed along the outer circumference of the secondary coil 220 and at least partially overlap the coil middle portion of the secondary coil 220 in the y-axis direction and the y-axis. It may be disposed between the first rib 313 and the 2-2 rib 323, which are disposed to overlap at least a portion in the direction. At this time, the first rib 313 and the 2-2 rib 323 correspond to the winding width of the secondary coil 220 in the z-axis horizontal direction from the 2-1 rib 322 and the third rib 332. Or it can be placed at regular intervals over a larger width. Meanwhile, the secondary coil 220 disposed inside the second end (SP) of the bobbin unit 300 may be supported by the coil support unit 325 and guided to the outside of the second bobbin 320.
  • SP second end
  • one end of the coil portion 200 is inserted into the inner receiving groove 314 of the first bobbin 310 while being inserted into the seating support portion 333 of the third bobbin 330, and the inserted inner structure is shown in FIG. Please refer to 9 for explanation.
  • FIG. 9 shows a state in which the first bobbin 310 in FIG. 8 has been removed.
  • the first seating portion 333-1 has a radius corresponding to the inner radius of the primary coil 210 and has a width in the z-axis direction of the first fastening means 321-3 and the second fastening means 331-2.
  • a seating protrusion (P1) having a width corresponding to may be formed.
  • a mounting protrusion (P2) corresponding to the seating protrusion (P1) may be formed at the lower part of the coil support part 325 of the second bobbin 320 in the x-axis direction.
  • the other end of the primary coil 210 may be inserted into and supported on the mounting protrusion P2.
  • the secondary coil 220 applied to the present invention is not a method in which a plurality of wires are wound around the bobbin portion 300, but a seating support disposed on one side (lower left diagonal direction) of the third bobbin 330 ( The entire secondary coil 220 may be wound along the outer circumference of the second seating portion 333-2 of 333) in a flipped state. That is, the wire wound on the outside of the secondary coil 220 can be turned over once around the second seating portion 333-2 and wound on the inside of the secondary coil 220, and the secondary coil The wire wound on the inside of 220 may be turned over once around the second seating portion 333-2 and wound on the outside of the secondary coil 220.
  • the entire secondary coil 220 is flipped once to change the inner and outer directions of the current flow direction, thereby controlling the inductance deviation caused by the length difference between the wires. Since this variation in inductance ultimately causes heat generation when driving the transformer, the overall temperature of the transformer can be lowered through this embodiment.
  • an external force may be applied to the wire at the point C1 where the secondary coil 220 is once flipped, and the withstand voltage may be weakened as, for example, the coating is peeled off. Therefore, in order to solve this problem, an inner receiving groove 314 is formed in the first bobbin 310, and one end of the primary coil 210 and the secondary coil 220 is wound on a seating support portion 333. ) can be applied by inserting it into the inner receiving groove 314 so that it is not exposed.
  • the second seating portion 333-2 may include a pair of support portions 333-3 that are spaced apart from one side in the z-axis direction and the other side in the x-axis direction and respectively protrude in the z-axis direction.
  • a secondary coil 220 may be disposed between the spaced apart supports 333-3.
  • the secondary coil 220 disposed on the support part 333-3 formed on one side of the second seating part 333-2 is flipped once and the guide bar 333 -4), while being guided by contact with the upper part in the x-axis direction or the lower part in the x-axis direction, it can be guided to the support part 333-3 formed on the other side of the second seating part 333-2.
  • the secondary coil 220 when configured in two or more rows up and down in the x-axis direction, the secondary coil 220 flipped over as described above through the guide bar 333-4 It can be divided into upper and lower sections and guided to the support portion 333-3 formed on the other side of the second seating portion 333-2.
  • Figure 11 is shown to understand the structure of the support part 333-3 and the guide bar 333-4 of the third bobbin 330, and the separation distance in the x-axis direction between the support parts 333-3 is the secondary coil ( 220) may correspond to or be greater than the x-axis direction thickness.
  • the guide bar 333-4 may protrude in the z-axis direction from the other side of the second seating portion 333-2 along the winding direction of the secondary coil 220.
  • the protruding length of the guide bar 333-4 may be smaller than or equal to the protruding length of the support bar 333-3 disposed on the other side of the second seating portion 333-2.
  • the protruding position of the guide bar 333-4 may be disposed between each support portion 333-3 in the y direction.
  • the shape of the guide bar 333-4 can be configured in various shapes, for example, it can be configured in a rod shape.
  • Figure 12a is a plan view of the shape of the secondary coil wound on the seating support portion of the primary bobbin in the embodiment shown in Figure 9, viewed from the This is an example diagram showing the state in which the primary coil is placed.
  • a plurality of secondary coils L1, L2, L3, and L4 drawn out in the direction of the support portion 333-2 of the first bobbin are sequentially arranged side by side from the inside to the outside.
  • the secondary coil drawn into the support part 333-3 formed on one side of the second seating part 333-2 is turned over once on the outside of the first bobbin and the support part formed on the other side of the second seating part 333-2 ( 333-3).
  • a plurality of secondary coils (L1, L2, L3, L4) are formed from the inside to the outside of L1, L2, L3, and L4. are placed in order.
  • the plurality of secondary coils are adhered by an adhesive member to minimize the gap between each coil.
  • a plurality of secondary coils (L1, L2, L3, L4) that are turned over once on the outside of the first bobbin and are introduced into the support portion (333-3) formed on the other side of the second seating portion (333-2) are moved from the inside to the outside. It is placed in the following order: L1, L2, L3, L4. That is, unlike the prior art in which the secondary coil disposed on the outermost side of one side of the bobbin is symmetrically disposed on the outermost side of the other side of the bobbin, the secondary coil disposed on the outermost side of the bobbin is turned over once on the outside of the bobbin. It can be introduced into the innermost part of the bobbin. Likewise, the secondary coil disposed on the innermost side of the bobbin is flipped once on the outside of the bobbin and then retracted into the outermost side of the bobbin.
  • Figure 13a is a plan view of the shape of the secondary coil wound on the seating support of the primary bobbin in the embodiment shown in Figure 10, viewed from the x-axis direction
  • Figure 13b is an example in which the secondary coil is composed of two rows, within the core. This is an example diagram showing the state in which the primary coil is placed.
  • Figures 13a and 13b show an embodiment in which the secondary coils are arranged in multiple layers to form two rows.
  • a plurality of secondary coils (L11, L21, L12, L22, L13, L23, L14, L24, L15, L25, L16, L26) are formed in multiple layers in the first direction. ) are arranged sequentially from the inside to the outside based on the center of the bobbin.
  • the upper coil between the midfoot portions 113 and 123 and the first outer foot portions 111 and 121 extends from the inner side where the midfoot portions 113 and 123 are disposed, L11, L12, L13, and L14.
  • the secondary coil introduced into the support part 333-3 formed on one side of the second seating part 333-2 is turned over once on the outside of the first bobbin. At this time, the secondary coil is flipped in opposite directions at the top and bottom of the first direction.
  • the secondary coils (L11 to L16) disposed at the top are turned over in the order of L16, L15, L14, L13, L12, and L11 from the top in the first direction, while the secondary coils (L21 to L26) disposed at the bottom ) is turned over in the order of L21, L22, L23, L24, L25, and L26 from the top in the first direction.
  • the upper secondary coils (L11 to L16) and lower secondary coils (L21 to L26), which are turned over once on the outside of the primary bobbin, are introduced into the support portion (333-3) formed on the other side of the second seating portion (333-2). do.
  • the upper secondary coils (L11 to L16) inserted between the midfoot portions 113 and 123 and the second outer foot portions 112 and 122 are located on the inner side where the midfoot portions 113 and 123 are disposed. It is placed in the order of L16, L15, L14, L13, L12, and L11, and the lower secondary coil is placed in the order of L26, L25, L24, L23, L22, and L21 from the inner side where the midfoot portions 113 and 123 are disposed. It is brought in and placed.
  • the transformer according to the above-described embodiment can secure a high leakage inductance value while implementing a slimmed down structure of the bobbin portion 300, so a circuit board on which such a transformer is placed can be used to display a display device, for example, a flat panel.
  • a type TV can be provided.
  • the transformer according to the above-described embodiment can prevent current from flowing in a direction with low inductance as the inductance deviation after winding is reduced.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

La présente invention concerne un transformateur et un dispositif d'affichage équipé de celui-ci, le transformateur comprenant : une partie noyau comprenant un noyau supérieur et un noyau inférieur faisant face au noyau supérieur dans une première direction, le noyau supérieur et/ou le noyau inférieur étant divisé en une pluralité de noyaux de segments dans une seconde direction croisant la première direction ; une partie bobine comprenant une bobine primaire et une bobine secondaire, la bobine primaire et la bobine secondaire comprenant chacune une partie latérale, l'autre partie latérale et une partie centrale entre la partie latérale et l'autre partie latérale ; et une partie enroulement couplée à la partie noyau et à la partie bobine, la partie enroulement comprenant : une première partie d'extrémité disposée parallèlement à une partie latérale de la partie bobine dans la seconde direction ; une seconde partie d'extrémité située à l'opposé de la première partie d'extrémité et sur laquelle est disposée l'autre partie latérale de la partie bobine ; et une partie intermédiaire disposée entre la première partie d'extrémité et la seconde partie d'extrémité et sur laquelle est disposée la partie centrale de la partie bobine, et dont au moins une partie est enveloppée par la pluralité de noyaux de segments.
PCT/KR2023/005587 2022-09-29 2023-04-25 Transformateur et dispositif d'affichage le comprenant WO2024071554A1 (fr)

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Citations (5)

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KR20090028382A (ko) * 2007-11-26 2009-03-18 부전전자 주식회사 인버터용 박형 대용량 트랜스포머
KR101032231B1 (ko) * 2010-07-02 2011-05-02 삼성전기주식회사 트랜스포머 및 이를 갖는 디스플레이 장치
US20130147594A1 (en) * 2011-09-23 2013-06-13 Yujing Technology Co., Ltd Transformer Structure Having Double-axis Iron Core
KR101686975B1 (ko) * 2015-10-08 2017-01-20 티디케이한국 주식회사 코일 부품
JP2021077879A (ja) * 2019-11-05 2021-05-20 Tdk株式会社 コイル装置

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Publication number Priority date Publication date Assignee Title
KR100748934B1 (ko) 2005-11-10 2007-08-13 최홍현 가변형 누설 자속 트랜스포머
KR20120138700A (ko) 2012-06-14 2012-12-26 삼성전기주식회사 트랜스포머 및 이를 구비하는 디스플레이 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090028382A (ko) * 2007-11-26 2009-03-18 부전전자 주식회사 인버터용 박형 대용량 트랜스포머
KR101032231B1 (ko) * 2010-07-02 2011-05-02 삼성전기주식회사 트랜스포머 및 이를 갖는 디스플레이 장치
US20130147594A1 (en) * 2011-09-23 2013-06-13 Yujing Technology Co., Ltd Transformer Structure Having Double-axis Iron Core
KR101686975B1 (ko) * 2015-10-08 2017-01-20 티디케이한국 주식회사 코일 부품
JP2021077879A (ja) * 2019-11-05 2021-05-20 Tdk株式会社 コイル装置

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