CN202513015U - Planar transformer - Google Patents
Planar transformer Download PDFInfo
- Publication number
- CN202513015U CN202513015U CN 201220100156 CN201220100156U CN202513015U CN 202513015 U CN202513015 U CN 202513015U CN 201220100156 CN201220100156 CN 201220100156 CN 201220100156 U CN201220100156 U CN 201220100156U CN 202513015 U CN202513015 U CN 202513015U
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- pcb board
- winding
- flat surface
- magnetic core
- surface transformer
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Abstract
The utility model discloses a planar transformer, which comprises a planar magnetic core and more than two PCBs (Printed Circuit Boards), wherein each PCB has at least one layer structure; windings are arranged on layers of each PCB; the PCBs are insulated and separated from each other and are clamped and fixed by the planar magnetic core which forms a loop; and the windings of all the PCBs are combined by being connected with one another in series or parallel so as to form primary and secondary coils of the planar transformer. The planar transformer is formed by the more than two PCBs which are insulated and separated from one another and laminated and combined with one another, and compared with the conventional planer transformer with a single multiple-layer PCB, the planar transformer is lower in cost; and when large current output or multi-way output is needed, the conductive cross section area and the number of the output windings of the planer transformer can be increased by properly increasing the piece number of the PCBs, so that the transformer can support the large current output or multi-way output.
Description
Technical field
The utility model relates to a kind of transformer, more particularly, relates to a kind of flat surface transformer that is made up of the polylith pcb board.
Background technology
Along with Switching Power Supply constantly towards small size more, more high power density and more high efficiency direction develop; Transformer as one of key element in the power electronic equipment must adapt to this development trend; Flat surface transformer is exactly the transformer of a kind of novel high power density that under this background, produces; Particularly, in power module, obtained using widely by the flat surface transformer that winding constitutes is set on pcb board.
In the prior art, flat surface transformer generally covers pcb board and the magnetic core that the copper cabling is a winding by setting and constitutes, and has on the pcb board to be used for the opening that magnetic core passes, and covers the copper cabling around aperture distribution.Existing flat surface transformer all is on every layer an of multi-layer PCB board, winding to be set, and through going up lead terminal that plated-through hole the welds together splicing ear as external electrical with PCB, can realize exporting the needs of plurality of voltages.But when the electric current of needs output was big, in order to obtain enough conductive cross-sectional area, pcb board must be done a lot of layers.The number of plies is many more, and the manufacturing cost of pcb board is also high more.The cost of pcb board increases substantially, and must influence the manufacturing cost of whole flat surface transformer.
When using the output of multichannel winding, every increase by one tunnel output winding will certainly increase the number of plies of pcb board or reduce the use number of plies that big electric current is exported winding.Increase the number of plies of pcb board, its manufacturing cost will increase, and reduce the output number of plies of big electric current winding, will reduce its conductive cross-sectional area, cause loss to increase, and heating strengthens, and can't pass through big electric current.
The utility model content
The purpose of the utility model provides the flat surface transformer that a kind of cost is low, support big electric current and multichannel output.
The technical scheme that the utility model adopts is following: a kind ofly be provided with the flat surface transformer that the pcb board of winding constitutes by polylith; Comprise planar magnetic core and have the pcb board of one deck structure at least; Have on the said pcb board and be used for the opening that magnetic core passes, all be provided with winding on said each layer of pcb board, it is characterized in that: said pcb board is more than two; Each pcb board is insulated from each other is separated by; And fix by the planar magnetic core clamping that forms the loop, through the series and parallel combination, form the primary and secondary coil of said flat surface transformer between the winding of all pcb boards.
All be provided with several plated-through holes on the described pcb board, the two ends of the winding on each layer of pcb board are communicated with formation one current channel respectively with the different metallic through hole, and the plated-through hole of series and parallel combination through different windings two ends between the said winding is communicated with.
Described flat surface transformer comprises that also several are used for external lead terminal, and said lead terminal passes plated-through hole corresponding on the pcb board and is communicated with corresponding winding.
Said planar magnetic core is made up of last magnetic sheet and following magnetic sheet clamping, and following magnetic sheet is provided with magnetic axis, and said pcb board is sleeved on the magnetic axis.Said magnetic sheet and the following magnetic sheet gone up is a pair of or more than two pairs.
Between described planar magnetic core and the pcb board, all be provided with dielectric film between each pcb board, realize that electrical isolation and magnetic are coupled.
The utlity model has following beneficial effect:
The utility model is by range upon range of the combining of the pcb board with less number of plies more than two, and with respect to using the monolithic multi-layer PCB board, material cost is lower, can effectively reduce the production cost of entire product; When the big electric current of needs is exported, can suitably increase the piece number of pcb board, increase its conductive cross-sectional area, thereby make the big electric current output of transformer support; When the needs multichannel is exported, also can suitably increase the quantity of pcb board, thereby increase the quantity of its output winding, make transformer support multichannel output.
Description of drawings
Fig. 1 is the decomposing schematic representation of the utility model embodiment one;
Fig. 2 is the electrical connection diagram of the utility model embodiment one;
Fig. 3 is the effect sketch map of the utility model embodiment one;
The winding that Fig. 4 a-Fig. 4 d is followed successively by on the top layer, first intermediate layer, second intermediate layer, bottom of the pcb board 21 among the utility model embodiment one is arranged sketch map;
The winding that Fig. 4 e-Fig. 4 k is followed successively by on the top layer, first intermediate layer, second intermediate layer, bottom of the pcb board 22 among the utility model embodiment one is arranged sketch map;
The winding that Fig. 4 i-Fig. 4 l is followed successively by on the top layer, first intermediate layer, second intermediate layer, bottom of the pcb board 23 among the utility model embodiment one is arranged sketch map;
Fig. 5 is the decomposing schematic representation of the utility model embodiment two;
Fig. 6 is the effect sketch map of embodiment two;
Fig. 7 is the decomposing schematic representation of the utility model embodiment three;
Fig. 8 is the effect sketch map of embodiment three.
Embodiment
Combine accompanying drawing that the utility model is further described at present:
Like Fig. 1, shown in Figure 3, the flat surface transformer of the utility model preferred embodiment comprises three pcb board 21-23, and every pcb board has four layers, also comprise one secondary I the planar magnetic core of type, four dielectric film 41-44, ten lead terminals.Wherein:
Be provided with cylindrical or square magnetic axis 34 in the middle of the magnetic sheet 32 under the planar magnetic core, both sides are provided with two convex edges 33; The middle perforate of pcb board 21-23 and dielectric film 41-44 can be sleeved on the magnetic axis 34 and be installed between magnetic sheet 31, the following magnetic sheet 32.
All be provided with dielectric film between planar magnetic core and pcb board and any two pcb boards, fix with epoxy resin between magnetic core and the dielectric film.Bonding between the last magnetic sheet 31 of planar magnetic core and the faying face of following magnetic sheet 32 with the magnetic core bonded adhesives.
All be provided with several plated-through holes on the pcb board 21-23, plated-through hole is located at the left and right sides of pcb board or the edge of middle part perforate.The two ends of the winding on each layer of pcb board are communicated with formation one current channel respectively with the different metallic through hole.Thereby lead terminal passes plated-through hole corresponding on the pcb board is communicated with corresponding winding, realizes the series and parallel combination between the winding on all each layers of pcb board, forms the primary and secondary coil of said flat surface transformer.
Shown in Fig. 2, Fig. 3 and Fig. 4 a-Fig. 4 l; Pcb board 21 and pcb board 23 the winding of top layer respectively through plated-through hole A and D and separately the windings in series of bottom form two-way six together and enclose windings; Through the plated-through hole on the pcb board 21,23 1,4 above-mentioned two-way six circle winding parallel connections are welded together to form the N1 winding respectively by lead terminal a, d; Effectively increased the conductive cross-sectional area of N1 winding; Reaching can be through the purpose of big electric current, and the quantity that can increase pcb board as required increases electric current.
In addition; Pcb board 21, pcb board 22 and pcb board 23 together form three tunnel two circle windings by lead terminal h, k through the windings in series on the plated-through hole 8,11 and second intermediate layer at the winding on first intermediate layer; Through the plated-through hole on pcb board 21, pcb board 22 and the pcb board 23 7,12 above-mentioned three tunnel two circle winding parallel connections are welded together to form the N3 winding by lead terminal g, l again; Effectively increased the conductive cross-sectional area of N3 winding; Reaching can be through the purpose of big electric current, and the quantity that can increase pcb board as required increases electric current.
In like manner, pcb board 22 connect with the plated-through hole E of its bottom through plated-through hole C at the winding of top layer, and formation has one tunnel eight winding that encloses, the N2 winding is drawn through the plated-through hole on the pcb board 22 5,6 by lead terminal e, f; Pcb board 22 forms one tunnel three circle winding at the winding on first intermediate layer through plated-through hole F on the plated-through hole B and second intermediate layer and the windings in series on second intermediate layer, the N4 winding is drawn through the plated-through hole on the pcb board 22 9,10 by lead terminal i, j; Through increasing the quantity of pcb board 22, increase a plurality of output windings, can realize the purpose of multichannel output.
Like Fig. 5,6 is the utility model embodiment two; Be that with embodiment one difference magnetic sheet convex edge 33 has only one under the planar magnetic core of flat surface transformer; Magnetic axis 34 is located at down magnetic sheet 32 edges; Magnetic axis 34 can be as shown in Figure 5 square, also can be cylindrical, and other structures and implementation result are with embodiment one.
Like Fig. 7,8 is the utility model embodiment three; Be to use the parallelly connected use of two width of cloth magnetic cores with embodiment one difference, increased the magnetic core sectional area, according to Faraday's electromagnetic induction law; The magnetic core sectional area increases and is twice; The winding number of turns reduces one times, has increased the through-flow ability of flat surface transformer like this, and other structures and implementation result are with embodiment one.The following magnetic sheet 32 of planar magnetic core also can be the following magnetic sheet like above-mentioned embodiment two, and the middle perforate of pcb board and dielectric film can be sleeved on the magnetic axis 34, and planar magnetic core also can be more a plurality of uses arranged side by side.
Each layer of pcb board of all embodiment of the utility model gone up the setting of winding, can arrange that flexibly planar magnetic core also can be designed to sandwich construction according to the needs of reality; Pcb board also two, more than three, principle is the same with the foregoing description, does not give unnecessary details one by one at this.
The execution mode of the utility model is not limited thereto; According to foregoing; Ordinary skill knowledge and customary means according to this area; Do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite, equivalent modifications, replacement or change that the utility model can also be made other various ways all can realize the utility model purpose.
Claims (6)
1. a flat surface transformer comprises planar magnetic core and has the pcb board of one deck structure at least, has on the said pcb board to be used for the opening that magnetic core passes; All be provided with winding on said each layer of pcb board; It is characterized in that: said pcb board is more than two, and each pcb board is insulated from each other is separated by, and is fixed by the planar magnetic core clamping that forms the loop; Through the series and parallel combination, form the primary and secondary coil of said flat surface transformer between the winding of all pcb boards.
2. flat surface transformer according to claim 1; It is characterized in that: all be provided with several plated-through holes on each pcb board; Each winding two ends on the said pcb board are communicated with formation one current channel respectively with the different metallic through hole, the plated-through hole of series and parallel combination through different windings two ends between the said winding is communicated with.
3. flat surface transformer according to claim 1 is characterized in that: described flat surface transformer comprises that also several are used for external lead terminal, and said lead terminal passes plated-through hole corresponding on the pcb board and is communicated with corresponding winding.
4. flat surface transformer according to claim 1 is characterized in that: said planar magnetic core is made up of last magnetic sheet and following magnetic sheet clamping, and following magnetic sheet is provided with magnetic axis, and said pcb board is set on the magnetic axis.
5. flat surface transformer according to claim 4 is characterized in that: said magnetic sheet and the following magnetic sheet gone up is a pair of or more than two pairs.
6. flat surface transformer according to claim 1 is characterized in that: between described planar magnetic core and the pcb board, all be provided with dielectric film between each piece pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220100156 CN202513015U (en) | 2012-03-16 | 2012-03-16 | Planar transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220100156 CN202513015U (en) | 2012-03-16 | 2012-03-16 | Planar transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202513015U true CN202513015U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220100156 Expired - Fee Related CN202513015U (en) | 2012-03-16 | 2012-03-16 | Planar transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202513015U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943332A (en) * | 2014-03-07 | 2014-07-23 | 杭州电子科技大学 | Winding design method for multi-winding output planar transformer |
| CN104200980A (en) * | 2014-08-20 | 2014-12-10 | 北京卫星制造厂 | Assembly method for high-power planar transformer |
| CN105469946A (en) * | 2015-12-24 | 2016-04-06 | 上海继胜磁性材料有限公司 | Mobile phone charger and PCB transformer thereof |
| 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 |
| CN106067372A (en) * | 2016-05-20 | 2016-11-02 | 浙江求缺科技有限公司 | A kind of multilayer planar winding coil method for designing being applicable to twin columns core structure |
| CN107204228A (en) * | 2016-03-18 | 2017-09-26 | 太阳诱电株式会社 | Electronic unit and its manufacture method |
| WO2017197550A1 (en) * | 2016-05-16 | 2017-11-23 | 博立多媒体控股有限公司 | Electromagnetic induction device and manufacturing method therefor |
| CN109524209A (en) * | 2018-12-29 | 2019-03-26 | 深圳市优必选科技有限公司 | Switching Power Supply and miniature transformer |
| US10939543B2 (en) | 2017-12-29 | 2021-03-02 | International Business Machines Corporation | Unified conductor to lower the resistance between a planar transformer and one or more inductors |
-
2012
- 2012-03-16 CN CN 201220100156 patent/CN202513015U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943332A (en) * | 2014-03-07 | 2014-07-23 | 杭州电子科技大学 | Winding design method for multi-winding output planar transformer |
| CN104200980A (en) * | 2014-08-20 | 2014-12-10 | 北京卫星制造厂 | Assembly method for high-power planar transformer |
| CN105469946A (en) * | 2015-12-24 | 2016-04-06 | 上海继胜磁性材料有限公司 | Mobile phone charger and PCB transformer thereof |
| CN107204228B (en) * | 2016-03-18 | 2019-07-05 | 太阳诱电株式会社 | Electronic component and its manufacturing method |
| US10714266B2 (en) | 2016-03-18 | 2020-07-14 | Taiyo Yuden Co., Ltd. | Electronic component and method of manufacturing the same |
| US10431387B2 (en) | 2016-03-18 | 2019-10-01 | Taiyo Yuden Co., Ltd. | Electronic component and method of manufacturing the same |
| CN107204228A (en) * | 2016-03-18 | 2017-09-26 | 太阳诱电株式会社 | Electronic unit and its manufacture method |
| WO2017197550A1 (en) * | 2016-05-16 | 2017-11-23 | 博立多媒体控股有限公司 | Electromagnetic induction device and manufacturing method therefor |
| CN109074936A (en) * | 2016-05-16 | 2018-12-21 | 博立多媒体控股有限公司 | Electromagnetic induction device and preparation method thereof |
| CN106067372A (en) * | 2016-05-20 | 2016-11-02 | 浙江求缺科技有限公司 | A kind of multilayer planar winding coil method for designing being applicable to twin columns core structure |
| 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 |
| US10939543B2 (en) | 2017-12-29 | 2021-03-02 | International Business Machines Corporation | Unified conductor to lower the resistance between a planar transformer and one or more inductors |
| CN109524209A (en) * | 2018-12-29 | 2019-03-26 | 深圳市优必选科技有限公司 | Switching Power Supply and miniature transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20150316 |
|
| EXPY | Termination of patent right or utility model |