CN106449042A - High-efficiency planar transformer - Google Patents
High-efficiency planar transformer Download PDFInfo
- 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
Links
Classifications
-
- 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
- H01F27/2804—Printed windings
-
- 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
- H01F27/2871—Pancake coils
-
- 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
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
-
- 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
- H01F27/2804—Printed windings
- H01F2027/2814—Printed 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
-
- 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
- H01F27/2804—Printed windings
- H01F2027/2819—Planar 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
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610924712.1A CN106449042A (en) | 2016-10-24 | 2016-10-24 | High-efficiency planar transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610924712.1A CN106449042A (en) | 2016-10-24 | 2016-10-24 | High-efficiency planar transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106449042A true CN106449042A (en) | 2017-02-22 |
Family
ID=58175870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610924712.1A Pending CN106449042A (en) | 2016-10-24 | 2016-10-24 | High-efficiency planar transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106449042A (en) |
Cited By (2)
| 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)
| 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 |
-
2016
- 2016-10-24 CN CN201610924712.1A patent/CN106449042A/en active Pending
Patent Citations (5)
| 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)
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9799448B2 (en) | Inductor, transformer, and method | |
| US7671714B2 (en) | Planar inductive component and a planar transformer | |
| KR101555398B1 (en) | Magnetic electrical device | |
| US7280024B2 (en) | Integrated transformer structure and method of fabrication | |
| JP2005310865A (en) | Coil component | |
| KR20130063363A (en) | Common mode noise filter | |
| CN105225793A (en) | Inductor and manufacture method thereof | |
| CN106449042A (en) | High-efficiency planar transformer | |
| CN100511502C (en) | Inductor, transformer and manufacturing method thereof | |
| US20030234436A1 (en) | Semiconductor device with a spiral inductor and magnetic material | |
| CN104882260A (en) | Planar transformer | |
| CN205542318U (en) | Transformer winding and transformer based on flexible circuit board | |
| CN207490881U (en) | Impedance transformation element and communication device | |
| TWM406265U (en) | Inductance IC chip packaging multi-layer substrate | |
| CN202307480U (en) | Independent multilayer printed circuit board (PCB) planar transformer | |
| CN204577235U (en) | Flat surface transformer | |
| CN106373733B (en) | A kind of adjustable flat surface transformer and its manufacture method | |
| JPH05109557A (en) | High frequency thin film transformer and high frequency thin film inductor | |
| CN206471205U (en) | A kind of adjustable flat surface transformer | |
| CN210778186U (en) | Flat transformer | |
| CN108054151A (en) | A kind of variable package substrate of inductance | |
| JP3909799B2 (en) | Semiconductor integrated circuit device | |
| CN108417364A (en) | A kind of novel high-power planar transformer method for winding | |
| CN202110931U (en) | Planar transformer | |
| CN218482079U (en) | Multilayer nanocrystalline inductor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |