CN103928219A - Multi-winding planar transformer manufactured on PCBs (printed circuit boards) - Google Patents

Multi-winding planar transformer manufactured on PCBs (printed circuit boards) Download PDF

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Publication number
CN103928219A
CN103928219A CN201410106922.0A CN201410106922A CN103928219A CN 103928219 A CN103928219 A CN 103928219A CN 201410106922 A CN201410106922 A CN 201410106922A CN 103928219 A CN103928219 A CN 103928219A
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China
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layer
pcb board
wire guide
winding
pcb
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Application number
CN201410106922.0A
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Chinese (zh)
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CN103928219B (en
Inventor
柏玉新
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Changxing Baicheng Electronics Co Ltd
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Changxing Baicheng Electronics Co Ltd
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Priority to CN201410106922.0A priority Critical patent/CN103928219B/en
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Publication of CN103928219B publication Critical patent/CN103928219B/en
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Abstract

The invention discloses a multi-winding planar transformer manufactured on PCBs (printed circuit boards). The multi-winding planar transformer comprises six layers of single PCBs, EI (electromagnetic induction)-type planar magnetic cores and four windings. The EI-type planar magnetic cores are arranged on the various layers of PCBs, the four windings are arranged among the various layers of PCBs, the various layers of PCBs keep insulated from one another, three through holes are sequentially formed in the middle of each layer of PCB along the width direction of the layer of PCB, the corresponding EI-type planar magnetic cores are mounted in the three through holes of each layer of PCB, the two sides of each layer of PCB are respectively provided with four equidistant circular metalized wire holes along the width direction of the layer of PCB, one of the four windings is an input winding, the other three windings are output windings, and wires of the windings penetrate the wire holes. The multi-winding planar transformer has the advantages that the PCB-type planar transformer comprises the small-size planar magnetic cores and coils jointly, the coils comprise corresponding wires on the PCBs, and accordingly a winding framework of the traditional transformer can be omitted; the multi-winding planar transformer is good in radiating performance and low in influence of parasitic parameters and can be high in switching frequency.

Description

A kind of many windings flat surface transformer being produced on PCB
Technical field
The present invention relates to transformer, be specifically related to the many windings flat surface transformer on a kind of PCB of being produced on.
Background technology
High frequency transformer is one of element indispensable in all kinds of Switching Power Supplies.Traditional high frequency transformer volume is large, and wire winding is complicated.And along with the increase of Switching Power Supply power output, have to select large magnetic core and large skeleton to make the high frequency transformer of corresponding more volume, manufacture difficulty and cost rise.Various, need low-voltage, high-current and in spatial volume and limited electronic equipment thereof, traditional high frequency transformer is difficult to be suitable for.
Summary of the invention
Technical problem to be solved by this invention is just to provide the many windings flat surface transformer on a kind of PCB of being produced on, and can use various and need low-voltage, high-current and in spatial volume and limited electronic equipment thereof.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the many windings flat surface transformer on a kind of PCB of being produced on, comprise 6 layers of pcb board of monolithic, be located at the EI type planar magnetic core on each floor pcb board and be located at Si road winding between each floor pcb board, between each layer of pcb board, keep mutual insulating, in the middle of each layer of pcb board, in broad ways, have successively three through holes, on EI type planar magnetic core, be installed in three through holes, the both sides broad ways of each layer of pcb board is offered respectively four equidistant circular wire guides that metallized, Si road winding Zhong You mono-road winding input, three road winding outputs, the wire of winding passes from wire guide, at winding, walk in line process, keep all windings to cover the overlapping area of copper cabling in the direction of vertical pcb board be 0.
Preferably, in three through holes, first through hole is inverted T-shaped, and second through hole is rectangle, and the 3rd through hole is T shape.
Preferably, this flat surface transformer power is 30W, and wherein the second road winding is 10V/300mA output, Third Road winding is 10V/200mA output, and Si road winding is 5V/5A output, and first via winding is 4 circles, the second road and Third Road winding are 2 circles, and Si road winding is 1 circle.
Preferably, first via winding starts to cover copper cabling from first wire guide of ground floor pcb board one side, around second wire guide two circle, and through layer 6 pcb board, and after second wire guide, two circles, second wire guide of layer 6 pcb board one side finally.
Preferably, the second road winding starts to cover copper cabling from first wire guide of second layer pcb board opposite side, around second wire guide two circle, and through layer 5 pcb board, and second of layer 5 pcb board opposite side wire guide finally.
Preferably, Third Road winding starts to cover copper cabling from the 4th wire guide of second layer pcb board opposite side, around second wire two circle, and through layer 5 pcb board, and the 3rd of layer 5 pcb board opposite side the wire guide finally.
Preferably, Si road winding starts from same wire guide by two-way, finally the sub-cabling of same wire guide forms, be specially: the first way cabling covers copper cabling since the 3rd wire guide of the 3rd layer of pcb board one side, around second wire guide, one circle, finally the 4th of the 3rd layer of pcb board one side the wire guide; The second way cabling covers copper cabling since the 3rd wire guide of the 4th layer of pcb board one side, around second wire guide, one circle, finally the 4th of the 4th layer of pcb board one side the wire guide.
PCB type flat surface transformer of the present invention consists of jointly undersized planar magnetic core and the coil that consists of the corresponding cabling on PCB, it does not need the winding skeleton of traditional transformer, and good heat dissipation, the impact of transformer parasitic parameter is little, and switching frequency can be done very highly.
Compare with the high frequency transformer that traditional Same Efficieney is exported, its volume reduces greatly, and efficiency improves.It is high that this invents former secondary winding coupled degree, and leakage inductance is little; Distributed capacitance impact between winding reduces to minimum; Save the pcb board number of plies, effectively reduce the cost of whole flat surface transformer.This transformer can be applied to and variously need low-voltage, high-current and in spatial volume and limited electronic equipment thereof.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is ground floor winding plane graph;
Fig. 2 is second layer winding plane graph;
Fig. 3 is the 3rd layer of winding plane graph;
Fig. 4 is the 4th layer of winding plane graph;
Fig. 5 is layer 5 winding plane graph;
Fig. 6 is layer 6 winding plane graph.
Embodiment
The present invention is the many windings flat surface transformer on a kind of PCB of being produced on, a kind ofly by 6 layers of pcb board of monolithic and EI type planar magnetic core, to be formed, in the middle of 6 layers of pcb board of monolithic, in broad ways, have successively three through holes, first through hole 1 is inverted T-shaped, second through hole 2 is rectangle, the 3rd through hole 3 is T shape, and EI type planar magnetic core is installed in three through holes, drives respectively four equidistant circular wire guides 4 that metallized in the both sides broad ways of 6 layers of pcb board of monolithic; Between each layer of pcb board, keep mutual insulating.
As shown in Fig. 1 and Fig. 6, first via winding is: first via winding starts to cover copper cabling from first wire guide of ground floor pcb board one side, around second wire guide, two circles, and through layer 6 pcb board, after second wire guide two circle, second wire guide of layer 6 pcb board one side finally.
As shown in Figure 2 and Figure 5, the second road winding is: the second road winding starts to cover copper cabling from first wire guide of second layer pcb board opposite side, around second wire guide two circle, and through layer 5 pcb board, second of layer 5 pcb board opposite side wire guide finally.
Third Road winding is: Third Road winding starts to cover copper cabling from the 4th wire guide of second layer pcb board opposite side, around second wire two circle, and through layer 5 pcb board, and the 3rd of layer 5 pcb board opposite side the wire guide finally.
As shown in Figure 3 and Figure 4, Si road winding is: Si road winding starts from same wire guide by two-way, finally the sub-cabling of same wire guide forms, be specially: the first way cabling covers copper cabling since the 3rd wire guide of the 3rd layer of pcb board one side, around second wire guide, one circle, finally the 4th of the 3rd layer of pcb board one side the wire guide; The second way cabling covers copper cabling since the 3rd wire guide of the 4th layer of pcb board one side, around second wire guide, one circle, finally the 4th of the 4th layer of pcb board one side the wire guide.
The order of above-mentioned wire guide 4 is to calculate to downside from pcb board upside.
In walking line process, keep all windings to cover the overlapping area of copper cabling in the direction of vertical pcb board be 0.This flat surface transformer power grade is 30W, the input of You Yi road winding, and three road winding outputs, wherein the second road winding is 10V/300mA output, and Third Road winding is 10V/200mA output, and Si road winding is 5V/5A output.First via winding is 4 circles, and the second road and Third Road winding are 2 circles, and Si road winding is 1 circle.

Claims (7)

1. the many windings flat surface transformer being produced on PCB, it is characterized in that: comprise 6 layers of pcb board of monolithic, be located at the EI type planar magnetic core on each floor pcb board and be located at Si road winding between each floor pcb board, between each layer of pcb board, keep mutual insulating, in the middle of each layer of pcb board, in broad ways, have successively three through holes, on EI type planar magnetic core, be installed in three through holes, the both sides broad ways of each layer of pcb board is offered respectively four equidistant circular wire guides that metallized, Si road winding Zhong You mono-road winding input, three road winding outputs, the wire of winding passes from wire guide, at winding, walk in line process, keep all windings to cover the overlapping area of copper cabling in the direction of vertical pcb board be 0.
2. the many windings flat surface transformer being produced on PCB according to claim 1, is characterized in that: in three through holes, first through hole is inverted T-shaped, and second through hole is rectangle, and the 3rd through hole is T shape.
3. the many windings flat surface transformer being produced on PCB according to claim 1, it is characterized in that: this flat surface transformer power is 30W, wherein the second road winding is 10V/300mA output, Third Road winding is 10V/200mA output, Si road winding is 5V/5A output, first via winding is 4 circles, and the second road and Third Road winding are 2 circles, and Si road winding is 1 circle.
4. according to the many windings flat surface transformer on PCB that is produced on described in claims 1 to 3 any one, it is characterized in that: first via winding starts to cover copper cabling from first wire guide of ground floor pcb board one side, around second wire guide, two circles, and through layer 6 pcb board, after second wire guide two circle, second wire guide of layer 6 pcb board one side finally.
5. the many windings flat surface transformer being produced on PCB according to claim 1, it is characterized in that: the second road winding starts to cover copper cabling from first wire guide of second layer pcb board opposite side, around second wire guide, two circles, and through layer 5 pcb board, second of layer 5 pcb board opposite side wire guide finally.
6. the many windings flat surface transformer being produced on PCB according to claim 1, it is characterized in that: Third Road winding starts to cover copper cabling from the 4th wire guide of second layer pcb board opposite side, around second wire, two circles, and through layer 5 pcb board, the 3rd of layer 5 pcb board opposite side the wire guide finally.
7. the many windings flat surface transformer being produced on PCB according to claim 1, it is characterized in that: Si road winding starts from same wire guide by two-way, finally the sub-cabling of same wire guide forms, be specially: the first way cabling covers copper cabling since the 3rd wire guide of the 3rd layer of pcb board one side, around second wire guide, one circle, finally the 4th of the 3rd layer of pcb board one side the wire guide; The second way cabling covers copper cabling since the 3rd wire guide of the 4th layer of pcb board one side, around second wire guide, one circle, finally the 4th of the 4th layer of pcb board one side the wire guide.
CN201410106922.0A 2014-03-21 2014-03-21 A kind of Multiple coil flat surface transformer being produced on PCB Active CN103928219B (en)

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CN103928219B CN103928219B (en) 2016-08-24

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105761881A (en) * 2016-05-20 2016-07-13 浙江求缺科技有限公司 Planar winding coil for double-column magnetic core structure
CN107273563A (en) * 2017-04-24 2017-10-20 东南大学 A kind of flat surface transformer PCB windings parasitic capacitance Equivalent calculation method
CN108364765A (en) * 2018-02-09 2018-08-03 电子科技大学 A kind of potting core inductance and preparation method thereof
CN110556238A (en) * 2018-06-01 2019-12-10 株式会社田村制作所 Electronic component
WO2022246609A1 (en) * 2021-05-24 2022-12-01 宏启胜精密电子(秦皇岛)有限公司 Circuit board and manufacturing method therefor

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Publication number Priority date Publication date Assignee Title
CN1126878A (en) * 1994-06-21 1996-07-17 住友特殊金属株式会社 Process of producing a multi-layered printed-coil substrate, printed-coil substrates and printed-coil components
US7859382B2 (en) * 2008-09-26 2010-12-28 Lincoln Global, Inc. Planar transformer
CN102237187A (en) * 2010-04-30 2011-11-09 深圳市澳磁电源科技有限公司 Planar transformer and method for manufacturing same through integration
CN202307480U (en) * 2011-11-14 2012-07-04 成都芯通科技股份有限公司 Independent multilayer printed circuit board (PCB) planar transformer
CN102832026A (en) * 2012-09-19 2012-12-19 山东电力集团公司济南供电公司 High-frequency high-pressure high-power density transformer
CN203721451U (en) * 2014-03-21 2014-07-16 长兴柏成电子有限公司 Multi-winding planar transformer made on PCB

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1126878A (en) * 1994-06-21 1996-07-17 住友特殊金属株式会社 Process of producing a multi-layered printed-coil substrate, printed-coil substrates and printed-coil components
US7859382B2 (en) * 2008-09-26 2010-12-28 Lincoln Global, Inc. Planar transformer
CN102237187A (en) * 2010-04-30 2011-11-09 深圳市澳磁电源科技有限公司 Planar transformer and method for manufacturing same through integration
CN202307480U (en) * 2011-11-14 2012-07-04 成都芯通科技股份有限公司 Independent multilayer printed circuit board (PCB) planar transformer
CN102832026A (en) * 2012-09-19 2012-12-19 山东电力集团公司济南供电公司 High-frequency high-pressure high-power density transformer
CN203721451U (en) * 2014-03-21 2014-07-16 长兴柏成电子有限公司 Multi-winding planar transformer made on PCB

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105761881A (en) * 2016-05-20 2016-07-13 浙江求缺科技有限公司 Planar winding coil for double-column magnetic core structure
CN107273563A (en) * 2017-04-24 2017-10-20 东南大学 A kind of flat surface transformer PCB windings parasitic capacitance Equivalent calculation method
CN107273563B (en) * 2017-04-24 2020-08-25 东南大学 Equivalent calculation method for parasitic capacitance of PCB winding of planar transformer
CN108364765A (en) * 2018-02-09 2018-08-03 电子科技大学 A kind of potting core inductance and preparation method thereof
CN110556238A (en) * 2018-06-01 2019-12-10 株式会社田村制作所 Electronic component
WO2022246609A1 (en) * 2021-05-24 2022-12-01 宏启胜精密电子(秦皇岛)有限公司 Circuit board and manufacturing method therefor

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