WO2019027265A1 - Transformateur planaire à double noyau - Google Patents

Transformateur planaire à double noyau Download PDF

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Publication number
WO2019027265A1
WO2019027265A1 PCT/KR2018/008776 KR2018008776W WO2019027265A1 WO 2019027265 A1 WO2019027265 A1 WO 2019027265A1 KR 2018008776 W KR2018008776 W KR 2018008776W WO 2019027265 A1 WO2019027265 A1 WO 2019027265A1
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WO
WIPO (PCT)
Prior art keywords
substrate
core
present
secondary coil
transformer
Prior art date
Application number
PCT/KR2018/008776
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English (en)
Korean (ko)
Inventor
이주열
Original Assignee
이주열
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 이주열 filed Critical 이주열
Publication of WO2019027265A1 publication Critical patent/WO2019027265A1/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
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • 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
    • 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

Definitions

  • the present invention relates to a planar transformer, and more particularly to a dual core planar transformer.
  • a wire wound type transformer is difficult to apply to a power supply device having a high frequency switching frequency due to an increase in loss due to a skin effect and a proximity effect occurring at a switching frequency of 100 kHz or more
  • a planar transformer having a high frequency band can be used in a power supply device for a high frequency band by reducing a high frequency loss, thereby achieving miniaturization and high efficiency at the same time.
  • the conventional planar transformer has the same characteristics as the winding transformer by implementing the primary winding and the secondary winding on the laminated PCB.
  • a planar transformer has a disadvantage that the number of stacked PCBs increases in order to arrange the number of windings .
  • Korean Patent Registration No. 10-0366241 relates to a thin film planar transformer and a technique for forming a plurality of layers by winding a copper plate on a PCB up and down on a PCB for miniaturization and forming the upper and lower ferrite E cores is disclosed .
  • the bulge of the ferrite core is large at the center of the transformer, and the number of stacked PCBs increases when the number of windings of the coil is large. Also, in the PCB manufacturing process, there is a problem in that a process of manufacturing a PCB hole into which the E-core protrusion can enter due to the projections of the upper and lower ferrite E cores is required.
  • the present invention can provide a dual core planar transformer that can be downsized by reducing the number of substrates.
  • the present invention can provide a dual-core planar transformer that can be miniaturized without a shape in which the center portion of the ferrite E core of the transformer protrudes.
  • the present invention provides a dual-core planar transformer which is easy to manufacture by changing the structure of a transformer, thereby improving the economical efficiency.
  • a dual-core planar transformer of the present invention includes a planar upper core and a lower plate-type lower core electromagnetically coupled with the upper core, a plurality of planar substrates disposed between the upper core and the lower core, And a primary coil and a secondary coil formed in a planar double helical structure, wherein the upper core and the lower core are flat without facing each other.
  • the plurality of flat plate-like substrates of the present invention is characterized by including a first substrate and a second substrate on which the primary coil is formed, and the second substrate and the third substrate on which the secondary coil is formed.
  • a first secondary coil and a second secondary coil are formed between the second substrate and the third substrate of the present invention, and the first secondary coil and the second secondary coil are connected to each other through a winding And the directions are opposite to each other.
  • the first substrate of the present invention is characterized in that a pattern hole through which the primary coil is seated is formed.
  • the second substrate of the present invention is characterized in that pattern holes are formed on which the primary coil and the secondary coil can be placed.
  • the third substrate of the present invention is characterized in that pattern holes are formed in which the first and second secondary coils can be seated.
  • the primary coil of the present invention is connected to the primary winding terminal through a via hole.
  • the first secondary coil and the second secondary coil of the present invention are connected to the secondary winding terminal through a via hole.
  • a miniaturized dual core planar transformer can be installed in high power ultra thin equipment.
  • the number of substrates can be reduced compared with a conventional planar transformer, and the thickness of the transformer can be reduced.
  • the present invention is lighter than conventional planar transformers.
  • the upper and lower surfaces of the ferrite core can be formed into a thin planar shape, thereby reducing the manufacturing cost.
  • the metal thickness of the secondary winding can be reduced by improving the efficiency due to the double spiral structure.
  • the present invention it is possible to improve the efficiency by reducing the winding capacitance generated in the line pattern of the upper / lower layer due to the reduction of the substrate to be laminated.
  • FIG. 1 is a view showing a configuration of a transformer according to the prior art.
  • FIG. 2 is a perspective view schematically showing a configuration of a dual core planar transformer of the present invention.
  • FIG. 3 is a cross-sectional view of the dual-core planar transformer of FIG. 2 taken on line A-A '.
  • FIG. 4 is an exploded perspective view specifically illustrating a configuration of a dual core planar transformer of the present invention.
  • FIG. 5 is a view showing a core portion of a dual core planar transformer of the present invention and a shape in which a substrate is removed.
  • FIG. 6 is a view showing a shape of a secondary coil of the dual core planar transformer of the present invention.
  • Fig. 1 is a block diagram of a computer system according to an embodiment of the present invention.
  • a conventional transformer includes upper and lower cores 300 and 400 having E-shaped protrusions 301 and 401 at the center thereof, and an air gap between the protrusions according to the characteristics of the transformer. . If the protrusions 301 and 401 having air gaps are formed as described above, it is easy to fix the coils therein, but the thickness of the transformer can not be reduced, which leads to limitations in downsizing.
  • FIG. 2 is a perspective view schematically showing a configuration of a dual core planar transformer of the present invention
  • FIG. 3 is a cross-sectional view of a dual core planar transformer of FIG. 2 taken along line AA '
  • Fig. 3 is an exploded perspective view specifically showing a configuration of a core plane transformer. 2 to 4
  • the dual core planar transformer of the present invention comprises a pair of upper and lower cores 11 and 12 in the form of flat plates without protrusions, a substrate without through holes for penetrating the ferrite core 21, 22, 23, and planar coils 31, 32, 33.
  • a pair of ferrite and lower cores 11 and 12 confronted by an ultra-thin PCB can induce a magnetic flux by an applied current of a plane coil without a through hole, and the first and second coils can be electromagnetically coupled have.
  • the upper core 11 and the lower core 12 may be in the form of a flat thin plate in which the two cores do not form any projections on the surfaces facing each other. As a result, the transformer does not need to be increased in height due to the protruding portion, which makes it possible to downsize the transformer.
  • the pair of cores (11, 12) may be wrapped by a tape or the like, or may be further fixed with a fixing member.
  • the substrates 21 to 23 may include a first substrate 21 to a third substrate 23 which are sequentially stacked.
  • the conventional substrate has to have a through hole to accommodate the projections provided by the pair of cores, whereas the transformer according to the present invention uses a method of not forming the protrusions on the pair of cores 11 and 12
  • the effective area can be increased to the maximum, and the overall height can be reduced.
  • the substrates 21 to 23 existing in the pair of cores 11 and 12 and the flat plate- May be in the form of a substrate. Accordingly, the manufacturing process can be reduced in the process of manufacturing the transformer, and the efficiency of the fabrication can be increased.
  • holes may be formed in the respective substrates 21 to 23 for connecting the winding terminals.
  • the primary winding terminal L1 may be connected to the central portion in the longitudinal direction of the substrate 21 to 23, and the secondary winding terminal L2 may be connected to the opposite direction.
  • the coils 31 to 33 include a primary coil 31 and a secondary coil 32, 33.
  • the first and second coils 31 to 33 are formed in a double helical shape in which two plane windings are combined in an eight-letter form.
  • the substrate is not present between the secondary coils 32 and 33, Can exist.
  • the primary and secondary coils 31 to 33 may be formed in an eight-figure shape in which two spirals are connected to reduce the number of PCB layers for arranging the windings. Further, the winding directions of the first and second coils 31 to 33 may be opposite to each other.
  • the via holes V may be formed in the substrates 21 to 23, and the double helical coils are electrically connected to the winding terminals L1 and L2 through the via holes. That is, the primary coil 31 is connected to the primary winding terminal L1 through the via hole, and the secondary coil 32 can be connected to the secondary winding terminal L2 through the via hole.
  • a plurality of via holes may be formed, and the first and second coils 31 to 33 may be connected through respective via holes.
  • the substrates 21 to 23 may form through holes through which the primary and secondary coils 31 to 33 may be provided.
  • a pattern hole identical to the winding of the primary coil 31 on which the primary coil 31 can be mounted can be formed on the lower surface of the first substrate 21 and the upper surface of the second substrate 22. Holes having the same pattern as that of the windings of the secondary coils 32 and 33, on which the secondary coils 32 and 33 can be placed, may be formed on the lower surface of the second substrate 22.
  • the third substrate 23 may be provided with pattern holes on which the lower surfaces of the secondary coils 32 and 33 can be mounted.
  • the coils are inserted into the substrate at predetermined intervals, so that the first and second coils 31 to 33 are entirely wrapped with the substrates 21 to 23,
  • the overall height can be reduced.
  • the substrates 21 to 23 are formed with pattern holes for wrapping the primary and secondary coils 31 to 33, but they may be formed of other materials that can cover the primary and secondary coils 31 to 33
  • the present invention can be implemented without forming pattern holes.
  • FIG. 5 is a view showing a shape of a dual core planar transformer of the present invention in which a core portion and a substrate are removed
  • FIG. 6 is an enlarged view of a shape of a secondary coil of the dual core planar transformer of the present invention.
  • the primary coil 31 is formed by connecting the left side planar winding 311 and the right side planar winding 312 in a double helical shape through a connection portion 313.
  • the secondary coils 32 and 33 include a first secondary coil 32 and a second secondary coil 33.
  • the first secondary coil 32 is formed by connecting a left side planar winding 321 and a right side planar winding 322 through a connecting portion 323.
  • the second secondary coil 33 is formed by connecting the left side planar winding and the right side planar winding through a connecting portion (not shown). At this time, since the winding directions of the first secondary coil and the second secondary coil are different from each other, the respective connecting portions can cross each other.
  • the primary coil 31 constitutes a double helical line in the two turns whereas the secondary coil 32 and 33 constitutes a double helical in the eight turn planar winding,
  • the width of the windings can be wider than that of the car coils 32, 33.
  • the number of turns of the secondary coils 32 and 33 is 32 turns, which is the same as the conventional case, but can be implemented with only two layers, thereby reducing the number of substrates.
  • the primary coil 31 is conventionally formed of two layers of two-turn plane windings, according to the present invention, the primary coil 31 can be formed of a single layer using a double helix form.
  • the transformer according to the present invention can achieve the same effect as the conventional five-layer PCB substrate by using the three-layered PCB substrate by forming the primary and secondary coils 31 to 33 in a double- As a result, the transformer can be miniaturized and its efficiency can be enhanced.

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

Abstract

Cette invention concerne un transformateur planaire à double noyau, comprenant : un noyau supérieur à plaque plane; un noyau inférieur à plaque plane couplé de manière électromagnétique au noyau supérieur; une pluralité de substrats à plaque plane agencés entre le noyau supérieur et le noyau inférieur; et une bobine primaire et une bobine secondaire qui sont formées selon une structure en double spirale sur la pluralité de substrats, les surfaces opposées du noyau supérieur et du noyau inférieur étant planes sans saillies.
PCT/KR2018/008776 2017-08-03 2018-08-02 Transformateur planaire à double noyau WO2019027265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0098546 2017-08-03
KR1020170098546A KR20190014727A (ko) 2017-08-03 2017-08-03 듀얼 코어 평면 트랜스포머

Publications (1)

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WO2019027265A1 true WO2019027265A1 (fr) 2019-02-07

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KR (1) KR20190014727A (fr)
WO (1) WO2019027265A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102032556B1 (ko) * 2019-06-27 2019-10-15 (주)테라비 트랜스포머용 2차코일 성형물 제조방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08107023A (ja) * 1994-10-03 1996-04-23 Nemic Lambda Kk インダクタンス素子
JP2000269035A (ja) * 1999-03-15 2000-09-29 Toshiba Corp 平面磁気素子
JP2004040001A (ja) * 2002-07-05 2004-02-05 Taiyo Yuden Co Ltd コイル部品及び回路装置
JP2007173646A (ja) * 2005-12-22 2007-07-05 Matsushita Electric Works Ltd 電磁誘導部品および電源装置
KR20110111778A (ko) * 2010-04-05 2011-10-12 삼성전기주식회사 평면형 트랜스포머 및 이의 제조 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08107023A (ja) * 1994-10-03 1996-04-23 Nemic Lambda Kk インダクタンス素子
JP2000269035A (ja) * 1999-03-15 2000-09-29 Toshiba Corp 平面磁気素子
JP2004040001A (ja) * 2002-07-05 2004-02-05 Taiyo Yuden Co Ltd コイル部品及び回路装置
JP2007173646A (ja) * 2005-12-22 2007-07-05 Matsushita Electric Works Ltd 電磁誘導部品および電源装置
KR20110111778A (ko) * 2010-04-05 2011-10-12 삼성전기주식회사 평면형 트랜스포머 및 이의 제조 방법

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KR20190014727A (ko) 2019-02-13

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