CN106449042A - High-efficiency planar transformer - Google Patents

High-efficiency planar transformer Download PDF

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Publication number
CN106449042A
CN106449042A CN201610924712.1A CN201610924712A CN106449042A CN 106449042 A CN106449042 A CN 106449042A CN 201610924712 A CN201610924712 A CN 201610924712A CN 106449042 A CN106449042 A CN 106449042A
Authority
CN
China
Prior art keywords
substrate
core
conductor
opening
pcb board
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.)
Pending
Application number
CN201610924712.1A
Other languages
Chinese (zh)
Inventor
薛超
刘春江
叶松林
黄在艳
陈艳明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANG'AN XINYV ELECTRONIC Co Ltd
Original Assignee
GUANG'AN XINYV ELECTRONIC Co Ltd
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 GUANG'AN XINYV ELECTRONIC Co Ltd filed Critical GUANG'AN XINYV ELECTRONIC Co Ltd
Priority to CN201610924712.1A priority Critical patent/CN106449042A/en
Publication of CN106449042A publication Critical patent/CN106449042A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2804Printed windings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/24Magnetic cores
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2871Pancake coils
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2804Printed windings
    • H01F2027/2809Printed windings on stacked layers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2804Printed windings
    • H01F2027/2814Printed windings with only part of the coil or of the winding in the printed circuit board, e.g. the remaining coil or winding sections can be made of wires or sheets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2804Printed windings
    • H01F2027/2819Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit

Abstract

The invention discloses a high-efficiency planar transformer. The high-efficiency planar transformer comprises a core part, a substrate part, a pattern part and an opening part, wherein the core part comprises core couples electromagnetically coupled with each other; the core couples comprise a first core and a second core; the substrate part comprises at least one substrate arranged between the core couples; a via hole coupled to the core part is formed in the at least one substrate of the substrate part; the pattern part is formed on the at least one substrate and comprises a conductor with adjustable width; the pattern part is formed around the via hole in at least one substrate in a surrounding manner; the opening part comprises a nonconductor, a first opening and a second opening; the first opening is arranged on the part, overlapped with the core part, of the pattern part; the second opening is arranged on the part, not overlapped with the core part, of the pattern part. The high-efficiency planar transformer has the advantages of good high-frequency characteristic, good insulating property, good heat dissipation, good coupling between windings, low cost, easy production and the like.

Description

A kind of high efficiency flat surface transformer
Technical field
The present invention relates to transformer technology field, specifically a kind of high efficiency flat surface transformer.
Background technology
Flat surface transformer is to start to develop in the eighties in 20th century, and starts the one kind coming into operation newly in the mid-90 Ferrite inductance element.Because flat surface transformer is suitable for plane attachment, it is the main product that electronic product realizes frivolous miniaturization Product.Meanwhile, compared with conventional transformer, flat surface transformer not only has the advantage in structure, but also have power density high, Efficiency high, the low, thermal diffusivity of electric leakage be good and low cost and other advantages.So, with the continuous development of electronic technology, flat surface transformer Application be rapidly spread to notebook computer, automotive electronics, medical electronics, security system, work from single communication field Industry control, digital camera, digital to television, frequency converter, inverter, various AC/DC, DC/DC converter and military radar etc. Multiple fields.
Now, the production kind of flat surface transformer has been directed to the various aspects of conventional transformer (using contact pin), such as work( Rate transformer, wide-band transformer and impedance-matching transformer etc..At present, flat surface transformer has three kinds of different manufactures:1、 Wound-rotor type flat surface transformer, this mode, as conventional transformer coiling mode, is suitable for the system of high frequency, high-tension transformer Make;2nd, Copper Foil formula flat surface transformer, this mode is to make winding using Copper Foil, is folded into lattice coil, be suitable for manufacture low pressure, The transformer of high current;3rd, multi-sheet printed board-like flat surface transformer, this transformer is to adopt printed circuit board manufacturing process, Form helical winding on multi-layer sheet, be suitable for the transformer of the more stable middle low power of manufacturing property.However, working as electric current stream When crossing pattern, generate heat.Such pattern of being formed from each of substrate in multiple stackings and the heat that generates exceedes Optimum level required for user.
China Patent Publication No. is that the patent document of CN104882260A discloses a kind of invention and created name for plane change The patented product of depressor, it includes magnetic core, lower magnetic core and polylith pcb board, polylith pcb board be located at upper magnetic core and lower magnetic core it Between, the one side of every piece of pcb board prints the conductive metal wire as primary coil, and another side prints the conductive gold as secondary coil Belong to line, and the primary coil of every piece of pcb board all faces up magnetic core, the secondary coil of every piece of pcb board all faces down magnetic core, former limit line The exit of the exit of circle and secondary coil is located at the opposite sides of pcb board, arranges insulating barrier, often between every two pieces of pcb boards The opposite sides of one pcb board is separately provided for placing the conductive through hole of capillary, the exit connecting PCB board one of primary coil The conductive through hole of side, the conductive through hole of the exit connecting PCB board opposite side of secondary coil, the leading of each pcb board phase the same side Electric through-hole is connected by capillary, all fills out between upper magnetic core and the pcb board of the superiors and between lower magnetic core and undermost pcb board It is filled with high heat conductive insulating foamed material, but existing flat surface transformer has leakage inductance value greatly, power density is not high, radiating condition Difference, assembling is complicated, and cost of manufacture is high, the unstable problem of serviceability.
Content of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of high efficiency flat surface transformer, is become with solving existing plane Depressor has leakage inductance value greatly, and power density is not high, and radiating condition is poor, and assembling is complicated, and cost of manufacture is high, and serviceability is unstable Problem.
The present invention solves technical problem, be employed technical scheme comprise that:A kind of high efficiency flat surface transformer, including core Portion, substrate portion, drafting department and opening portion, described core portion has the core pair electromagnetically coupling to each other, and described core is to inclusion First core and the second core, described substrate portion have be arranged on described core between at least one substrate, described lining At least one substrate described of bottom has the via being coupled to described core portion, and described drafting department is at least one substrate described On formed and include the conductor with width adjustable, described drafting department is around the described via quilt of at least one substrate described The formation of cincture, described opening portion includes non-conductor, the first opening and the second opening, and described first opening is arranged on and core Partly the going up of the overlapping drafting department in portion, described second opening is arranged on partly going up of not overlapping with core portion drafting department, And first opening and described second opening be connected to each other.
Further, described drafting department around the via of at least one substrate described with the spiral-shaped formation by cincture.
Further, described substrate portion includes the first substrate and the second substrate stacking, and described drafting department is included described On first substrate formed primary conductor and on described second substrate formed secondary conductor, and described primary conductor and Described secondary conductor has default ratio of winding in-between.
Further, described substrate portion also includes at least one ground connection substrate, and described ground connection substrate has in described ground connection The grounding pattern being formed on substrate surface, described grounding pattern is formed by conductor, and described grounding pattern is electrically connected at least The ground of the described drafting department being formed on one substrate.
Further, described one winding of substrate is flat insulating line coiling, and another winding is pcb board, and described first Level conductor and secondary conductor are arranged in a crossed manner.
Further, the periphery of described core pair is coated with insulating tape.
Further, described primary conductor is flat line winding, and secondary conductor is pcb board, and primary conductor is led with secondary Body intersects to be placed.
Further, the pin on one piece of pcb board in described pcb board adopts many PIN contact pin form, and another piece of pcb board Upper corresponding pin adopts aperture form, and the pin of each contact pin form is inserted in the aperture of corresponding pin, makes this two pieces of PCB In plate, corresponding coil is connected and forms a closing coil.
Further, described pin extends to the direction perpendicular to pcb board surface, and pin extends to without departing from core pair Lower surface or the plane at upper surface place.
Further, described pcb board is multi-layer PCB board.
Compared with prior art, the present invention has the advantages that:A kind of high efficiency plane transformation proposed by the present invention Device, is a kind of flat surface transformer of employing pcb board, with tradition around line transformer compared with, there is preferable high frequency characteristics, insulating properties Can good, radiating good, the coupling between winding well, low cost, easily produce the advantages of, communication, computer, automotive electronics, number phase The fields such as machine, DTV all can be applied.
Brief description
Fig. 1 is overall structure diagram of the present invention;
Fig. 2 serves as a contrast bottom surface structure schematic diagram for the present invention;
Fig. 3 is grounded substrat structure schematic diagram for the present invention;
Fig. 4 is substrate portion of the present invention side structure schematic diagram.
In figure is numbered:1- core portion;11- core to, 111- first core, 112- second core, 2- substrate portion;21- Substrate, 211- first substrate, 212- second substrate, 3- ground connection substrate;31- grounding pattern, 4- opening portion;41- second opening, 42- first opening, 43- non-conductor, 5- pin;6- drafting department;61- primary conductor, 62- secondary conductor, 7- via.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further:
A kind of high efficiency flat surface transformer as Figure 1-4, including core portion 1, substrate portion 2, drafting department 6 and opening Portion 4, described core portion 1 has the core electromagnetically coupling to each other to 11, and described core is to including the first core 111 and the second core 112, described substrate portion 2 have be arranged on described core between at least one substrate 21, described substrate portion 2 described extremely A few substrate 21 has the via 7 being coupled to described core portion 1, described drafting department 6 shape at least one substrate 21 described Become and include to have the conductor of width adjustable, described opening portion 4 includes non-conductor 43, the first opening 42 and the second opening 41, described first opening 42 is arranged on partly going up of the drafting department 6 overlapping with core portion 1, and described second opening 41 is set In partly going up of not overlapping with core portion 1 drafting department 6, and the first opening 42 and described second opening 41 are connected to each other, the One opening 41 and the second opening 42 can physically be connected to each other.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, described drafting department 6 is around described at least one The via 7 of individual substrate 21 with the spiral-shaped formation by cincture, in order to have the winding of desired number, primary conductor 61 and secondary Conductor 62 can be formed with spiral-shaped around via 7, and primary conductor 61 takes spirality in each aspect Trend.Described substrate portion 2 includes the first substrate 211 and the second substrate 212 stacking, and described drafting department 6 is included described the The primary conductor 61 being formed on one substrate 211 and the secondary conductor 62 being formed on described second substrate 212, drafting department 6 exists Formed in each of multiple substrates, can be formed by the conductor that electric current can flow through, this conductor can have adjustable width Degree, drafting department 6 can serve as primary coil and the secondary coil therebetween with the general-purpose transformer of ratio of winding, and described primary Conductor 61 and described secondary conductor 62 have default ratio of winding in-between.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, opening portion 4 can on drafting department 6 shape Become.That is, opening portion 4 can be formed by non-conductor 43, to allow the change width of the conductor of drafting department 6.Can pass through Remove the part conductor of drafting department 6 in order to make variable-width using etch process, to form opening portion 4.Opening portion can be by Be formed as the first opening 42 on the conductor of drafting department 6 and the second opening 41.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, the first opening 42 and the second opening 41 physics Be connected to each other.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, the primary conductor 61 of drafting department 6 is formed On the first substrate 211, and secondary conductor 62 is formed on the second substrate 212.Here, primary conductor 61 and secondary conductor 62 can betwixt have default ratio of winding, and primary conductor 61 and secondary conductor can circumferentially be formed on substrate 21, be There is the winding of desired number, primary conductor 61 and secondary conductor 62 can be formed with the spirality around via 7 Shape, when needing substantial amounts of winding, primary conductor 61 and secondary conductor 62 can be formed separately on multiple substrates 21, can To provide through hole, to form electrical connection or the secondary conductor 62 in independent substrate 21 between the primary conductor 61 of independent substrate Between formed electrical connection.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, described grounding pattern 31 is formed by conductor, And described grounding pattern 31 is connected at least one substrate 21, described 21 1 windings of substrate are flat insulating line coiling, Another winding be pcb board, and described primary conductor 61 and secondary conductor 62 arranged in a crossed manner, described core to 11 periphery cladding There is insulating tape, described primary conductor 61 is flat line winding, secondary conductor 62 is pcb board, and primary conductor 61 is led with secondary Body 62 intersects to be placed, and the pin 5 on one piece of pcb board in described pcb board adopts many PIN contact pin form, and right on another piece of pcb board The pin 5 answered adopts aperture form, and the pin 5 of each contact pin form is inserted in the aperture of corresponding pin 5, makes this two pieces of PCB In plate, corresponding coil is connected and forms a closing coil, and described pin 5 extends to the direction perpendicular to pcb board surface, and Pin 5 extends to plane lower surface or upper surface being located without departing from core, and described pcb board is multi-layer PCB board.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, opening portion 4 can form 43 by non-conductor, To allow the change width of the conductor of drafting department 6, can by using etch process remove the part conductor of drafting department 6 in order to Make variable-width, to form opening portion 4, opening portion 4 reduces the area that electric current flows through, thus thereby result in electric current flowing Restriction may lead to increase be thermally generated.
It is provided with least one secondary insulating barrier, so that this has at least two or more electricity between described drafting department 6 The metal foil drafting department 6 of sense part insulate.Described primary conductor 61 and secondary conductor 62 include the metal foil with inductance component Film figure layer.The metal thin film patterns layer that this has inductance component is the metal material with high conductivity, thus steady and high The power signal that the output of effect ground is converted through this at least one secondary conductor 62.
Need explanation the invention discloses a kind of high efficiency flat surface transformer, described ground connection substrate 3 is arranged on stacking Multiple substrates 21 between and on its uppermost substrate or on its nethermost substrate, grounding pattern 31 can be by Conductor on ground connection substrate 3 surface is formed.Grounding pattern 31 may be electrically connected to the ground of drafting department 6.When electric current flows through drafting department 6 The heat radiation of Shi Shengcheng is to the grounding pattern 31 being formed on a large scale on ground connection substrate 3 surface so that generating from flat surface transformer Heat can reduce further.
The principle of the present invention and advantage:The invention discloses a kind of high efficiency flat surface transformer, flat surface transformer is conversion The device of alternating voltage, alternating current and impedance, when being connected with alternating current in primary coil, just produces AC magnetism in magnetic core Logical, make to induce voltage in secondary coil, transformer is made up of magnetic core and coil, coil has two or more windings, Wherein primary conductor connects the winding of power supply, by the first leg of the first core 111 is coupled to the second core to the 3rd leg 112 the first leg couples to the 3rd leg, to make core to electromagnetically coupling to each other, to be formed in each of multiple substrates 21 So that core can be inserted in multiple substrates 21 to 11 leg, substrate 21 is a winding by flat copper cash or flat in hole 7 Flat aluminum steel is coiled into, and flat conductor is conducive to avoiding the Kelvin effect of high-frequency alternating current output, strengthens the electric conductivity of winding, Reduce the electric energy loss of transformer, pin 5 extends to the plane being located without departing from core portion 1 lower surface or upper surface, effectively drops The low height of flat surface transformer, reduces equipment volume, and in primary conductor 61 and secondary conductor 62, a winding is flat Insulated wire coiling, another winding is pcb board printed wire winding, so that primary conductor 61 and secondary conductor 62 all can be carried larger Electric current, thus ensureing that its volume, still very on the premise of compact, substantially increases efficiency and the power of transformer.
Using pcb board flat surface transformer and tradition around line transformer compared with, armature winding and secondary windings in transformer One of winding (armature winding or secondary windings) use flat line winding, another winding be pcb board printed wire winding one Planting winding (primary or secondary) is pcb board printed wire winding, makes the armature winding of flat surface transformer and secondary windings all permissible Make flat surface transformer listen processing technology simple, uniformity is good, and reliability is high, ensureing that volume of transformer is compact, compact conformation Under the premise of substantially increase the operating efficiency of transformer and saved production cost there is fabulous high frequency characteristics, good insulation preformance, Radiating good, the coupling between winding well, low cost, easily produce the advantages of.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.

Claims (8)

1. a kind of high efficiency flat surface transformer, including core portion (1), substrate portion (2), drafting department (6) and opening portion (4), its It is characterised by:Described core portion (1) has the core electromagnetically coupling to each other to (11), and described core includes the first core to (11) (111) and the second core (112), described substrate portion (2) have be arranged on described core between (11) at least one lining Bottom (21), at least one substrate (21) of described substrate portion (2) has the via (7) being coupled to described core portion (1), described figure Case portion (6) forms and includes having the conductor that can adjust width at least one substrate (21), and described opening portion (4) includes Non-conductor (43), the first opening (42) and the second opening (41), described first opening (42) is arranged on overlapping with core portion (1) Partly the going up of drafting department (6), described second opening (41) is arranged on not overlapping with core portion (1) drafting department (6) Partly go up, and the first opening (42) and described second opening (41) are connected to each other;Described substrate portion (2) includes the first lining of stacking Bottom (211) and the second substrate (212), described drafting department (6) includes the primary conductor that formed upper in described first substrate (211) (61) and in the upper secondary conductor (62) being formed of described second substrate (212), and described primary conductor (61) and described time Level conductor (62) has default ratio of winding in-between;Described substrate portion (2) also includes at least one ground connection substrate (3), institute State ground connection substrate (3) have described ground connection substrate (3) surface on formed grounding pattern (31), described grounding pattern (31) by Conductor is formed, and described grounding pattern (31) is connected on described at least one substrate (21).
2. a kind of high efficiency flat surface transformer according to claim 1 it is characterised in that:Described drafting department (6) is around extremely The via (7) of a few substrate (21) is with the spiral-shaped formation by cincture.
3. a kind of high efficiency flat surface transformer according to claim 1 it is characterised in that:One of described substrate (21) around Organize as flat insulating line coiling, another winding is pcb board, and described primary conductor (61) and secondary conductor (62) intersection set Put.
4. a kind of high efficiency flat surface transformer according to claim 1 it is characterised in that:The periphery to (11) for the described core It is coated with insulating tape.
5. a kind of high efficiency flat surface transformer according to claim 1 it is characterised in that:Described primary conductor (61) is flat Horizontal line winding, secondary conductor (62) are pcb board, and primary conductor (61) intersects placement with secondary conductor (62).
6. a kind of high efficiency flat surface transformer according to claim 3 or 5 it is characterised in that:One piece in described pcb board Pin (5) on pcb board adopts many PIN contact pin form, and on another piece of pcb board, corresponding pin (5) adopts aperture form, often The pin (5) of one contact pin form is inserted in the aperture of corresponding pin (5), so that corresponding coil is connected and Form a closing coil.
7. a kind of high efficiency flat surface transformer according to claim 6 it is characterised in that:Described pin (5) to perpendicular to The direction on pcb board surface extends, and pin (5) extends to the plane (11) lower surface or upper surface being located without departing from core.
8. a kind of high efficiency flat surface transformer according to claim 3 or 5 it is characterised in that:Described pcb board is multilayer Pcb board.
CN201610924712.1A 2016-10-24 2016-10-24 High-efficiency planar transformer Pending CN106449042A (en)

Priority Applications (1)

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CN201610924712.1A CN106449042A (en) 2016-10-24 2016-10-24 High-efficiency planar transformer

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Application Number Priority Date Filing Date Title
CN201610924712.1A CN106449042A (en) 2016-10-24 2016-10-24 High-efficiency planar transformer

Publications (1)

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CN106449042A true CN106449042A (en) 2017-02-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020034730A1 (en) * 2018-08-13 2020-02-20 深圳Tcl新技术有限公司 Planar transformer
CN112837905A (en) * 2021-01-07 2021-05-25 广州金升阳科技有限公司 Magnetic core and planar transformer comprising same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000058341A (en) * 1998-08-06 2000-02-25 Nagano Japan Radio Co Planer transformer
CN102237189A (en) * 2010-03-22 2011-11-09 三星电机株式会社 Planar transformer
CN102568792A (en) * 2010-12-21 2012-07-11 三星电机株式会社 Planar transformer, driver and display device provided therewith
CN202695101U (en) * 2012-07-31 2013-01-23 南京思立科电子有限公司 Assembled planar transformer
CN104603892A (en) * 2012-07-04 2015-05-06 阿尔斯通技术有限公司 Transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000058341A (en) * 1998-08-06 2000-02-25 Nagano Japan Radio Co Planer transformer
CN102237189A (en) * 2010-03-22 2011-11-09 三星电机株式会社 Planar transformer
CN102568792A (en) * 2010-12-21 2012-07-11 三星电机株式会社 Planar transformer, driver and display device provided therewith
CN104603892A (en) * 2012-07-04 2015-05-06 阿尔斯通技术有限公司 Transformer
CN202695101U (en) * 2012-07-31 2013-01-23 南京思立科电子有限公司 Assembled planar transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020034730A1 (en) * 2018-08-13 2020-02-20 深圳Tcl新技术有限公司 Planar transformer
CN112837905A (en) * 2021-01-07 2021-05-25 广州金升阳科技有限公司 Magnetic core and planar transformer comprising same

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