WO2022025546A1 - 공통모드필터 - Google Patents
공통모드필터 Download PDFInfo
- Publication number
- WO2022025546A1 WO2022025546A1 PCT/KR2021/009608 KR2021009608W WO2022025546A1 WO 2022025546 A1 WO2022025546 A1 WO 2022025546A1 KR 2021009608 W KR2021009608 W KR 2021009608W WO 2022025546 A1 WO2022025546 A1 WO 2022025546A1
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- WO
- WIPO (PCT)
- Prior art keywords
- coil
- magnetic core
- common mode
- mode filter
- base member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
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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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F17/062—Toroidal core with turns of coil around it
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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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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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
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
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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
- H01F27/2895—Windings disposed upon ring cores
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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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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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
- H01F27/33—Arrangements for noise damping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F2017/065—Core mounted around conductor to absorb noise, e.g. EMI filter
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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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
- H01F2027/065—Mounting on printed circuit boards
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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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F2027/297—Terminals; Tapping arrangements for signal inductances with pin-like terminal to be inserted in hole of printed path
Definitions
- the present invention relates to a common mode filter.
- a common mode filter is one of electronic components installed on a circuit board. Such a common mode filter may be applied to various electronic devices such as a communication device and a display device, and may be used to remove conductive noise from the electronic device.
- Such a common mode filter passes signals necessary for circuit operation and removes common mode noise.
- the common mode filter is configured in a form in which a plurality of coils are wound on a magnetic core formed in a ring shape, respectively.
- a separate bobbin or case may cover the magnetic core to electrically insulate the magnetic core and the coil and protect the magnetic core from the external environment, and the coil is wound on the magnetic core covered with the bobbin or case.
- a separate component such as a separator for electrical insulation between coils is disposed on the central side of the case.
- the conventional common mode filter is accompanied by a separate case that surrounds the magnetic core, there is a limit in that the overall size of the filter is increased as much as the thickness of the case.
- the conventional common mode filter is laminated on one surface of the circuit board, if the common mode filter is installed on the circuit board, the total thickness of the common mode filter installed is inevitably increased by the thickness of the common mode filter from the thickness of the circuit board. .
- the present invention has been devised in view of the above points, and an object of the present invention is to provide a common mode filter capable of realizing thinning while ensuring insulation and durability.
- Another object of the present invention is to provide a common mode filter capable of reducing the overall installation thickness while being installed on a circuit board.
- the present invention provides a ring-shaped magnetic core made of a magnetic material, which is installed so as to be positioned in the arrangement hole on a circuit board including an arrangement hole that is formed through a predetermined area; a plurality of coils wound along an outer surface of the magnetic core; and a base member to which the magnetic core is coupled and provided with a plurality of connector members for electrically connecting the plurality of coils wound on the magnetic core to the outside; It provides a common mode filter that is caught on the side.
- the plurality of connector members may serve as a terminal for electrically connecting the plurality of coils wound on the magnetic core to the outside and serve as a fastening member for fastening the base member to the circuit board. It may be provided in the member.
- the base member has a ring-shaped body in which a hollow part is formed, a connecting member formed on the body to cross the hollow part, and a part of the magnetic core to be inserted into a predetermined depth from one surface of the connecting member so that a part of the magnetic core can be fitted. It may include a pair of coupling grooves.
- the plurality of coils may include a first coil and a second coil, and the first coil and the second coil surround the outer surface of the magnetic core and are positioned on the left and right sides of the connecting member so that the magnetic material is located on both sides. It may be wound on a core, and in the magnetic core, parts on which the first coil and the second coil are not wound are each pressed into the pair of coupling grooves, wherein the first coil and the second coil among the magnetic core are The unwound portion may be a portion positioned between a portion on which the first coil is wound and a portion on which the second coil is wound.
- the magnetic core may be coupled to the base member such that a thickness center coincides with a thickness center of the connecting member in a state in which the magnetic core is coupled to the base member through the pair of coupling grooves.
- the base member may further include at least two extension parts protruding outward by a predetermined length from the body and having one surface forming a stepped surface and one surface of the body, and one surface and the stepped surface of the body One surface of the extension portion forming the first portion and the second portion extending from the first portion extending from the body so that the first stepped surface and the second stepped surface having different heights can be formed, respectively.
- the second step surface may be installed to be caught on the edge of the arrangement hole.
- each of the plurality of connector members includes a first protrusion part which is fixed to the first part and protrudes a predetermined length from one surface of the first part so that the end of the coil can be connected, and a predetermined interval from the first protrusion part.
- a second protruding portion disposed outside the second portion to be spaced apart and inserted into a fastening hole penetratingly formed around the arrangement hole of the circuit board to fix the base member to the circuit board; It may include a connecting portion for interconnecting the ends of the two protrusions.
- the base member may further include at least two extension parts protruding a predetermined length outward from the body and having one surface forming a step surface and one surface of the body, and one surface and the stepped surface of the body One surface of the extended portion forming the can be installed to be caught on the edge of the arrangement hole.
- each of the plurality of connector members includes a pad portion provided to be exposed to the outside on one surface of an extension portion forming a step surface with one surface of the body and fixed to one surface of the circuit board through an SMD method, and the extension portion It may include a coil connection part provided so as to protrude outwardly from the end of the extension part by a length of the other surface of the coil to which the end of the coil is connected.
- the body and the extension portion may include a first arrangement groove drawn out from the magnetic core on one surface to accommodate the thickness of the coil connected to the coil connection portion, the first arrangement groove is formed in a predetermined depth.
- extension portion may include a second arrangement groove formed in a predetermined depth to accommodate the thickness of the portion exposed to the outside of the coil connection portion on one surface.
- the magnetic core may be made of a metal ribbon of an amorphous alloy or a nano-crystalline alloy, and the magnetic core may include an insulating coating layer formed on an outer surface to a predetermined thickness.
- the magnetic core may be a winding body in which a metal ribbon of an amorphous alloy or a nano-crystalline alloy is wound in a ring shape.
- the common mode filter may have a total thickness of 5 to 6 mm.
- the overall thickness can be reduced by securing insulation and durability, and the overall thickness of the electronic device can be reduced because the overall thickness can be reduced while being installed on the circuit board.
- FIG. 1 is a view showing a common mode filter according to an embodiment of the present invention.
- FIG. 2 is a view of FIG. 1 viewed from the bottom;
- FIG. 3 is an exploded view of FIG. 1;
- FIG. 4 is a cross-sectional view taken along the A-A direction of FIG. 1;
- FIG. 5 is a partial cutaway view showing the detailed configuration of a magnetic core that can be applied to FIG. 1;
- FIG. 6 is a view showing a state in which a common mode filter according to an embodiment of the present invention is installed on a circuit board;
- FIG. 7 is a cross-sectional view in the B-B direction of FIG.
- FIG. 8 is a view showing a common mode filter according to another embodiment of the present invention.
- FIG. 9 is a view seen from the bottom of FIG. 8;
- FIG. 10 is an exploded view of FIG. 8;
- FIG. 11 is a cross-sectional view in the C-C direction of FIG. 8;
- FIG. 12 is a view showing a state in which a common mode filter according to another embodiment of the present invention is installed on a circuit board, and;
- FIG. 13 is a cross-sectional view taken along the D-D direction of FIG. 12 .
- the common mode filters 100 and 200 may be installed on the circuit board 10 as shown in FIGS. 6 and 12 .
- a part of the common mode filters 100 and 200 according to an embodiment of the present invention may be installed while being caught on the circuit board 10 .
- the circuit board 10 may include an arrangement hole 12 penetratingly formed in a predetermined area, and the common mode filters 100 and 200 may include the arrangement hole 12 . ) and may be installed on the circuit board 10 to be located in a corresponding area.
- the common mode filters 100 and 200 may be installed with a portion of the total thickness accommodated by the placement hole 12 while a portion of the common mode filter 100 and 200 is caught on the edge of the placement hole 12 .
- the common mode filters 100 and 200 according to an embodiment of the present invention are installed on the circuit board 10 , a part of the total thickness of the common mode filters 100 and 200 is accommodated by the arrangement hole 12 . Therefore, the overall installation thickness installed on the circuit board 10 can be reduced.
- the common mode filters 100 and 200 include a magnetic core 110, a plurality of coils 121 and 122 and a base member as shown in FIGS. 1 to 4 and 8 to 11 . 130,230).
- the magnetic core 110 may be formed in a ring shape, and may be made of a material having magnetism.
- the magnetic core 110 may be a ferrite core formed by sintering or rolling ferrite powder, but as shown in FIG. 5 , the magnetic core 110 includes a plurality of plate-shaped metal ribbons 112 in a ring shape. It may be a turn-wound winding body.
- the metal ribbon 112 may be a heat-treated Fe-based alloy ribbon, and the Fe-based alloy may be used without limitation as long as it is a known Fe-based alloy employed as a magnetic core.
- the Fe-based alloy is a ternary alloy consisting of iron (Fe), silicon (Si), boron (B) and other impurities, iron (Fe), boron (B), carbon (C), copper A quaternary alloy consisting of (Cu) and other impurities, a five-element alloy consisting of iron (Fe), silicon (Si), boron (B), copper (Cu), niobium (Nb) and other impurities, or iron ( Fe), boron (B), carbon (C), copper (Cu), niobium (Nb) and other impurities may be a five-element alloy.
- the Fe-based alloy may include an amorphous structure or nanocrystalline grains.
- the magnetic core 110 may include an insulating coating layer 114 formed on an outer surface to a predetermined thickness.
- an insulating coating layer 114 may be formed using a dipping or spraying method.
- the magnetic core 110 may be formed as a single mass through the insulating coating layer 114, , although the coils 121 and 122 are directly wound on the outer surface of the magnetic core 110 , the coils 121 and 122 and the magnetic core 110 may be electrically insulated from each other through the insulating coating layer 114 .
- the magnetic core 110 can be protected from external force through the insulating coating layer 114 , so the common mode of the present invention In the filters 100 and 200 , a separate case or bobbin for enclosing the magnetic core 110 may be omitted.
- the common mode filters 100 and 200 can be implemented in a thin shape having a very thin thickness because the case or bobbin surrounding the magnetic core 110 can be omitted as compared to the prior art.
- the common mode filters 100 and 200 may have a very thin thickness with an overall thickness or an overall height of 5 to 6 mm.
- the overall thickness of the present invention is not limited thereto, and may be appropriately varied according to design conditions.
- the insulating coating layer 114 may be formed of a coating composition containing an organic compound, the organic compound may be an epoxy compound, and the coating composition may further include a curing agent capable of curing the epoxy compound. have.
- the insulating coating layer 114 is not limited thereto, and as long as it has insulation and can increase durability, it may be employed without limitation.
- the magnetic core 110 may be coupled to the base members 130 and 230 in a state in which the plurality of coils 121 and 122 are wound along the outer surface.
- the plurality of coils 121 and 122 may include a first coil 121 and a second coil 122 , and the first coil 121 and the second coil 122 are magnetic materials formed in a ring shape.
- Each of the cores 110 may be wound around the magnetic core 110 so as not to overlap each other and to be symmetrically disposed.
- the magnetic core 110 may be coupled to the base members 130 and 230 through a portion in which the first coil 121 and the second coil 122 are not wound.
- first coil 121 and the second coil 122 each wound on the magnetic core 110 may be electrically connected to the plurality of connector members 140 and 240 provided in the base member 130 and 230, respectively, The plurality of connector members 140 and 240 may be electrically connected to the circuit board 10 .
- the first coil 121 and the second coil 122 may receive power through the circuit board 10 and the plurality of connector members 140 and 240 .
- the base members 130 and 230 may be coupled to the magnetic core 110 on which the first coil 121 and the second coil 122 are wound to fix the magnetic core 110 , and the first coil A plurality of connector members 140 and 240 for electrically connecting the 121 and the second coil 122 to the circuit board 10 may be included.
- the base members 130 and 230 include a ring-shaped body 131 in which a hollow part is formed to accommodate the magnetic core 110, and the body 131 in the shape of a ring to cross the hollow part.
- a portion of the magnetic core 110 in which the first coil 121 and the second coil 122 is not wound may be inserted into the pair of coupling grooves 133 .
- first coil 121 and the second coil 122 are respectively disposed on the magnetic core 110 so as to be positioned on the left and right sides of the connecting member 132 while surrounding the outer surface of the magnetic core 110 . can be wound.
- the portion of the magnetic core 110 on which the first coil 121 and the second coil 122 is not wound includes the portion on which the first coil 121 is wound and the portion on which the second coil 122 is wound. It may be a part located between the parts to be
- the magnetic core 110 is positioned between the portion on which the first coil 121 is wound and the portion on which the second coil 122 is wound, and the first coil 121 and the second coil 122 are disposed. ) may be inserted into each of the unwound portions into the pair of coupling grooves 133 .
- the first coil 121 and the second coil 122 may be disposed to be located on both left and right sides of the connecting member 132 .
- the connection member 132 may serve as a separator to physically insulate the first coil 121 and the second coil 122 from each other.
- a portion of the connecting member 132 connected to the body 131 while the coupling groove 133 is formed is relatively wider toward the body 131 from the middle portion of the length of the connecting member 132 . It may be formed to have an area.
- the magnetic core is positioned between the portion on which the first coil 121 is wound and the portion on which the second coil 122 is wound, and the first coil 121 and the second coil 122 are not wound on.
- the portion 110 may have a larger area from the inside to the outside.
- the end of the first coil 121 and the end of the second coil 122 wound around the magnetic core 110 can secure a safe distance for electrical insulation.
- the portion of the magnetic core 110 inserted into the pair of coupling grooves 133 may be fixed to the coupling groove 133 through a separate adhesive, but is fixed to the coupling groove 133 through force fitting.
- the connecting member 132 may be formed to have a relatively thicker thickness t2 than the thickness t1 of the magnetic core 110 as shown in FIGS. 4 and 11 , and the coupling groove 133 . ) may be relatively larger than the thickness t1 of the magnetic core 110 .
- the thickness center of the magnetic core 110 and the thickness center of the connecting member 132 are It may be arranged to be positioned on a straight line (O).
- the total thickness of the magnetic core 110 can be completely accommodated in the coupling grooves 133 formed in the base members 130 and 230, thereby increasing the total thickness. can be minimized
- the common mode filters 100 and 200 according to an embodiment of the present invention may be partially caught on the edge of the arrangement hole 12 formed in the circuit board 10 .
- a part of the base members 130 and 230 is formed on the edge of the arrangement hole 12 . It can be jammed on the side.
- the magnetic core 110 may be disposed so as not to be laminated on one surface of the circuit board 10 .
- the plurality of connector members 140 and 240 provided on the base members 130 and 230 serve as terminals for electrically connecting the plurality of coils 121 and 122 wound on the magnetic core 110 to the circuit board 10 . It can serve both as a fastening member for fastening the base members 130 and 230 to the circuit board 10 .
- the base members 130 and 230 may include at least two extension parts 134 and 234 that protrude a predetermined length outward from the body 131 and have one surface forming a stepped surface with one surface of the body 131, , the at least two extension parts 134 and 234 may be fixed to the circuit board 10 through the plurality of connector members 140 and 240 .
- the extension portion 134 forming a step surface and one surface of the body 131 includes a first portion 134a extending from the body 131 and the first A second portion 134b extending from the portion 134a may be included, and the first portion 134a may be formed to have a relatively thinner thickness than the second portion 134b.
- one surface of the first part 134a and one surface of the second part 134b may form step surfaces having different heights. That is, one surface of the first portion 134a may form a first stepped surface formed to be stepped with one surface of the body 131 , and one surface of the second portion 134b may be formed with the first stepped surface and the first stepped surface. A second stepped surface may be formed to be stepped.
- the connector member 140 includes a first protrusion part 141 fixed to the first part 134a and the first protrusion part 141 and the first protrusion part 141 spaced apart from each other by a predetermined distance. It may include a second protruding portion 142 disposed on the outside of the second portion 134b, and a connecting portion 143 connecting the ends of the first protruding portion 141 and the second protruding portion 142 to each other. have.
- the first protruding part 141 may be fixed to the first part 134a so as to protrude a predetermined length from one surface of the first part 134a, and the second The protrusion part 142 may be spaced apart from the first protrusion part 141 and the extension part 134 by a predetermined distance through the connection part 143 .
- the first protruding portion 141 and the second protruding portion 142 may extend a predetermined length from the connecting portion 143 toward each other in the same direction.
- the ends of the coils 121 and 122 wound around the magnetic core 110 may be connected to the first protruding portion 141 protruding a predetermined length from one surface of the first portion 134a, and the second protruding portion Reference numeral 142 may be inserted into the fastening hole 14 formed through the circuit board 10 .
- the lower surface of the extension part 134 is a step surface through the lower surface of the first part 134a and the lower surface of the second part 134b.
- a lower surface of the first portion 134a may be a first stepped surface
- a lower surface of the second portion 134b may be a second stepped surface.
- the second stepped surface which is the lower surface of the second part 134b, may come into contact with one surface of the circuit board 10 , and the base member 130 may have the arrangement hole through the second stepped surface. (12) It can be installed to be caught on the edge side.
- the first protruding portion 141 may be fixed to the first portion 134a such that an end thereof protrudes downward from the lower surface of the first portion 134a by a predetermined length,
- the second protruding portion 142 may protrude downward from the outside of the second portion 134b.
- the extension part 134 accommodates the thickness of the connection part 143 as shown in FIGS. 1 and 3 so that the connection part 143 is moved outward from the upper surface of the extension part 134 . It may include a receiving groove (134d) that is formed to a predetermined depth in the upper surface so as not to protrude.
- the first protruding part 141 may be integrally formed with the extended part 134 through insert molding, but a separate member is formed after being inserted into the extended part 134 . can be fixed through
- the first part 134a may include a through hole 134c that is formed through the first protrusion part 141 in the height direction so that the first protrusion part 141 can be inserted.
- the first protruding portion 141 may be fixed through a separate fixing member 144 on the lower surface of the first portion 134a after passing through the through hole 134c.
- the circuit board 10 may include a plurality of fastening holes 14 penetratingly formed around the arrangement hole 12 .
- the base member 130 passes through the second step surface. It may be installed to be caught on the edge of the arrangement hole (12).
- the second protrusion 142 of the connector member 140 may be inserted into the fastening hole 14 formed in the circuit board 10 , and the second protrusion inserted into the fastening hole 14 side. The portion 142 may be fixed to the circuit board 10 through soldering.
- the common mode filter 100 may be installed by being caught on the circuit board 10 through the extension portion 134 of the base member 130 , and the magnetic core 110 . ) wound on the coils 121 and 122 may be electrically connected to the circuit board 10 through the connector member 140 .
- the connector member 140 may serve both as a terminal electrically connected to the circuit board 10 and as a fastening member for fixing the base member 130 to the circuit board 10 .
- the base member 230 protrudes a predetermined length from the body 131 to form an extended portion 234 that forms a step surface with one surface of the body 131 .
- an extended portion 234 that forms a step surface with one surface of the body 131 .
- a portion of the connector member 240 on one surface of the extension portion 234 forming the step surface may be provided to be exposed to the outside.
- the connector member 240 includes a pad portion 241 formed to be exposed to the outside on one surface of the extension portion 234 forming the step surface as shown in FIGS. 8 and 9, and the extension portion ( The other surface of the 234 may include a coil connection portion 242 provided to protrude outwardly from the end of the extension portion 234 with a partial length.
- the pad part 241 may be connected to the coil connection part 242 through the first buried part 243 embedded in the extension part 234 , and , the connector member 240 may further include a second embedding portion 244 bent from an end of the pad portion 241 and embedded in the extension portion 234 .
- the ends of the coils 121 and 122 wound around the magnetic core 110 may be connected to the coil connection part 242 protruding outward from the end of the extension part 234 , and the pad part 241 may be It may be in direct contact with one surface of the circuit board 10 .
- the lower surface of the extension part 234 may be formed as a stepped surface with the lower surface of the body 131 , and the connector member 240 is It may be integrated with the extension part 234 through insert molding.
- the connector member 240 may be provided in a shape in which a plate-shaped conductive member having a predetermined area is bent a plurality of times, and a portion of the entire length is exposed from the lower surface of the extension part 234 to the outside, A portion of the remaining length may be integrated with the extension portion 234 to be exposed to the outside from the upper surface of the extension portion 234 .
- the portion exposed to the outside from the lower surface of the extension portion 234 may form the pad portion 241 described above, and exposed to the outside from the upper surface of the extension portion 234 .
- the above-described portion may form the above-described coil connection portion 242
- the portion buried in the extension portion 234 may form the above-described first buried portion 243 and second buried portion 244 . .
- the pad portion 241 formed on the stepped surface which is the lower surface of the extension portion 234 , may be in direct contact with one surface of the circuit board 10 . Accordingly, the base member 230 may be installed by being caught on the edge of the arrangement hole 12 through the lower surface of the extension part 234 , and a pad provided on the step surface that is the lower surface of the extension part 234 .
- the portion 241 may be fixed to the circuit board 10 through an SMD method.
- the body 131 and the extension portion 234 are drawn out from the magnetic core 110 and are drawn in to a certain depth on the upper surface to accommodate the thickness of the coils 121 and 122 connected to the coil connection portion 242 . It may include a first arrangement groove (234a) to be. In addition, the extension portion 234 may include a second arrangement groove 234b that is formed to a predetermined depth on the upper surface to accommodate the thickness of the coil connection portion 242 .
- the first arrangement groove 234a and the second arrangement groove 234b receive the thickness of the coils 121 and 122 and the thickness of the coil connection part 242, respectively, and the coil ( 121 and 122) and the coil connection part 242 may be prevented from protruding to the outside.
- the base member 230 is can be installed to be caught on the edge of the arrangement hole 12 through the stepped surface formed on one surface of the extension part 234, and the pad portion 241 of the connector member 240 formed on the stepped surface is the SMD method. It can be fixed to one surface of the circuit board 10 through the.
- the common mode filter 200 may be installed by being caught on the circuit board 10 through the extension portion 234 of the base member 230 and the magnetic core 110 . ) wound on the coils 121 and 122 may be electrically connected to the circuit board 10 through the connector member 240 .
- the connector member 240 may serve as a terminal electrically connected to the circuit board 10 and as a fastening member for fixing the base member 230 to the circuit board 10 .
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- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
Claims (14)
- 소정의 면적으로 관통형성되는 배치공을 포함하는 회로기판에서 상기 배치공에 위치하도록 설치되는 공통모드필터로서,자성재질로 이루어진 링 형상의 자성체코어;상기 자성체코어의 외면을 따라 권선되는 복수 개의 코일; 및상기 자성체코어가 결합되고, 상기 자성체코어에 권선된 복수 개의 코일을 외부와 전기적으로 연결하기 위한 복수 개의 커넥터부재가 구비되는 베이스부재;를 포함하고,상기 베이스부재는 일부가 상기 배치공의 테두리측에 걸림설치되는 공통모드필터.
- 제1항에 있어서,상기 복수 개의 커넥터부재는, 상기 자성체코어에 권선된 복수 개의 코일을 외부와 전기적으로 연결하기 위한 단자로서의 역할과 상기 베이스부재를 상기 회로기판에 체결하는 체결부재로서의 역할을 겸할 수 있도록 상기 베이스부재에 구비되는 공통모드필터.
- 제1항에 있어서,상기 베이스부재는,중공부가 형성된 링 형상의 몸체와, 상기 중공부를 가로지르도록 상기 몸체에 형성되는 연결부재 및 상기 자성체코어의 일부가 끼워질 수 있도록 상기 연결부재의 일면으로부터 일정깊이 인입형성되는 한 쌍의 결합홈을 포함하는 공통모드필터.
- 제3항에 있어서,상기 복수 개의 코일은 제1코일과 제2코일을 포함하고,상기 제1코일 및 제2코일은 상기 자성체코어의 외면을 감싸면서 상기 연결부재의 좌,우 양측에 위치하도록 상기 자성체코어에 권선되며,상기 자성체코어는 상기 제1코일 및 제2코일이 권선되지 않은 부분이 상기 한 쌍의 결합홈에 각각 억지끼움되되,상기 자성체코어 중 상기 제1코일 및 제2코일이 권선되지 않은 부분은 상기 제1코일이 권선되는 부분과 상기 제2코일이 권선되는 부분 사이에 위치하는 부분인 공통모드필터.
- 제3항에 있어서,상기 자성체코어는 상기 한 쌍의 결합홈을 통해 상기 베이스부재에 결합된 상태에서 두께 중심이 상기 연결부재의 두께 중심과 일치하도록 상기 베이스부재에 결합되는 공통모드필터.
- 제3항에 있어서,상기 베이스부재는, 상기 몸체로부터 외측으로 일정길이 돌출되고 일면이 상기 몸체의 일면과 단차면을 형성하는 적어도 두 개의 연장부분을 더 포함하고,상기 몸체의 일면과 단차면을 형성하는 연장부분의 일면은 서로 다른 높이를 갖는 제1단차면과 제2단차면이 각각 형성될 수 있도록 상기 몸체로부터 연장되는 제1부분과 상기 제1부분으로부터 연장되는 제2부분을 포함하며,상기 제2단차면은 상기 배치공의 테두리에 걸림설치되는 공통모드필터.
- 제6항에 있어서,상기 복수 개의 커넥터부재 각각은,상기 제1부분에 고정되고 상기 코일의 단부가 연결될 수 있도록 상기 제1부분의 일면으로부터 일정길이 돌출되는 제1돌출부분과, 상기 제1돌출부분과 일정간격 이격되도록 상기 제2부분의 외측에 배치되고 상기 회로기판의 배치공 주위에 관통형성되는 체결공에 삽입되어 상기 베이스부재를 상기 회로기판에 고정하는 제2돌출부분과, 상기 제1돌출부분 및 제2돌출부분의 단부를 상호 연결하는 연결부분을 포함하는 공통모드필터.
- 제3항에 있어서,상기 베이스부재는, 상기 몸체로부터 외측으로 일정길이 돌출되고 일면이 상기 몸체의 일면과 단차면을 형성하는 적어도 두 개의 연장부분을 더 포함하고,상기 몸체의 일면과 단차면을 형성하는 연장부분의 일면은 상기 배치공의 테두리에 걸림설치되는 공통모드필터.
- 제8항에 있어서,상기 복수 개의 커넥터부재 각각은,상기 몸체의 일면과 단차면을 형성하는 연장부분의 일면에 외부로 노출되도록 구비되고 SMD 방식을 통해 상기 회로기판의 일면에 고정되는 패드부분과, 상기 연장부분의 타면에서 일부의 길이가 상기 연장부분의 단부로부터 외부로 돌출되도록 구비되어 상기 코일의 단부가 연결되는 코일연결부분을 포함하는 공통모드필터.
- 제9항에 있어서,상기 몸체 및 연장부분은 상기 자성체코어로부터 인출되어 상기 코일연결부분과 연결되는 코일의 두께를 수용할 수 있도록 일면에 일정깊이 인입형성되는 제1배치홈을 포함하는 공통모드필터.
- 제9항에 있어서,상기 연장부분은 상기 코일연결부분 중 외부로 노출되는 부분의 두께를 수용할 수 있도록 일면에 일정깊이 인입형성되는 제2배치홈을 포함하는 공통모드필터.
- 제1항에 있어서,상기 자성체코어는 비정질 합금 또는 나노 결정립 합금의 금속리본으로 이루어지고, 상기 자성체코어는 외면에 일정두께로 형성되는 절연성 코팅층을 포함하는 공통모드필터.
- 제12항에 있어서,상기 자성체코어는 비정질 합금 또는 나노 결정립 합금의 금속리본을 링 형상으로 권선한 권선체인 공통모드필터.
- 제1항에 있어서,상기 공통모드필터는 전체두께가 5 내지 6mm인 공통모드필터.
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| US18/004,170 US12603214B2 (en) | 2020-07-31 | 2021-07-26 | Common mode filter |
| CN202180049088.4A CN115836366A (zh) | 2020-07-31 | 2021-07-26 | 共模滤波器 |
| JP2023505389A JP7544414B2 (ja) | 2020-07-31 | 2021-07-26 | コモンモードフィルタ |
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| JP (1) | JP7544414B2 (ko) |
| KR (1) | KR102611501B1 (ko) |
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| EP4600978A1 (en) * | 2024-02-07 | 2025-08-13 | Delta Electronics (Thailand) Public Co., Ltd. | Integrated magnetic component |
| KR102822807B1 (ko) * | 2024-05-28 | 2025-06-19 | 주식회사 티엔씨 | 초박형 라인필터 및 이의 제조방법 |
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| US20230326645A1 (en) | 2023-10-12 |
| JP7544414B2 (ja) | 2024-09-03 |
| KR20220015753A (ko) | 2022-02-08 |
| KR102611501B1 (ko) | 2023-12-07 |
| JP2023536082A (ja) | 2023-08-23 |
| CN115836366A (zh) | 2023-03-21 |
| US12603214B2 (en) | 2026-04-14 |
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