CN202713789U - PCB planar transformer - Google Patents
PCB planar transformer Download PDFInfo
- Publication number
- CN202713789U CN202713789U CN201220427633.7U CN201220427633U CN202713789U CN 202713789 U CN202713789 U CN 202713789U CN 201220427633 U CN201220427633 U CN 201220427633U CN 202713789 U CN202713789 U CN 202713789U
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- pcb
- pcb board
- flat surface
- step structure
- layer
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- 238000004804 winding Methods 0.000 claims abstract description 38
- 230000002146 bilateral effect Effects 0.000 claims description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 35
- 238000010586 diagram Methods 0.000 description 11
- 238000007373 indentation Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The utility model relates to a PCB planar transformer. The PCB planar transformer comprises magnetic cores and at least two layers of PCBs. The edge of each layer of PCB is provided with a lead-wire end of a PCB winding; each layer of PCB is provided with a ladder-shaped structure at least formed in an area where the lead-wire end is arranged; and the lead-wire end of each layer of PCB is arranged on a ladder-shaped surface of a corresponding layer of PCB. According to the PCB planar transformer of the utility model, all the lead-wire ends of the windings are exposed, and a fault of the lead-wire end of each layer of PCB can be identified with easiness, which facilitates repair and maintenance; because that via holes and via hole insertion pins are omitted, a problem of electric insulation among the via holes can be avoided, thereby greatly improving safety performance and facilitating design; processes of lead-wire manufacturing and via hole manufacturing can be omitted, thereby facilitating processing and improving production efficiency.
Description
Technical field
The utility model relates to a kind of PCB flat surface transformer.
Background technology
As winding, the track winding is called the PCB winding to the PCB flat surface transformer with the track on the printed circuit board, is the flat surface transformer that is most widely used at present.The conventional transformer winding is to link to each other with circuit board by the pin on the skeleton, and the PCB flat surface transformer does not use skeleton, and the winding output can be the pad on the pcb board (part that is not covered by magnetic core), also can be the contact pin pin.
The flat surface transformer of use polylith pcb board as shown in Figure 1 forms a PCB winding on the every pcb board.This flat surface transformer comprises that mainly magnetic core 1, the three stacked pcb boards of putting and 2, three layers of pcb board center of lower magnetic core offer groove, is sheathed on the lower magnetic core 2 middle part magnetic posts, then upper magnetic core 1 is fastened with lower magnetic core 2 and forms closed magnetic circuit, consists of flat surface transformer.As other execution modes, also have four layers, five layers and more multi-layered situation.
Above-mentioned flat surface transformer, the winding leads of the layer that mediates is inconvenient to draw.Usually way is: offer via hole over against intermediate layer PCB winding leads end and be communicated with intermediate layer pcb board and top layer pcb board, then connect all pcb boards that this via hole passes through by lead-in wire or capillary, thereby intermediate layer PCB winding leads end is guided on the pcb board of top layer.In Fig. 1, the lead end of intermediate layer and lower floor's pcb board all causes the superiors, and at the superiors' formation lead end 32,33 separately, the superiors' pcb board lead end is 31.During use, be drawn out to main circuit board from the lead end 31,32,33 of the superiors' pcb board.Because the length of PCB winding is wider than magnetic core, after forming flat surface transformer, magnetic core is exposed at PCB winding two ends, so lead end is arranged on PCB winding edges at two ends.
There is certain defective in above-mentioned lead-in wire mode.Whether the first, except the two-layer pcb board in highest and lowest, the welding hole of all intermediate layer pcb boards all is dark hole, weld reliably, is difficult for checking, if there is fault, must disassemble transformer with the trouble-shooting point, maintenance difficulty is very large.
The second, via hole will pass through polylith pcb board (at least 2), between via hole and each the piece PCB coiling, and between each via hole, all will keep the safety of enough spacing guarantee electric insulation.And between the different layers PCB winding, and between the via hole of different windings, often have larger potential difference, especially true in high-tension circuit, therefore, this structure has been brought very large difficulty to insulating Design.
The 3rd, adopt the installation process of transformer of above-mentioned lead-in wire mode very complicated, need processing multilayer via hole, also to go between or the capillary welding, be not easy to mass production, reduced production efficient.
The utility model content
The purpose of this utility model provides a kind of PCB flat surface transformer, in order to solve the not problem of easy-maintaining, difficult design, processed complex of the conventional lead-in wire mode of existing flat surface transformer multi-layer PCB winding.
For achieving the above object, scheme of the present utility model is: a kind of PCB flat surface transformer, comprise magnetic core and two-layer at least pcb board, the magnetic core spiral-lock is on pcb board, the edge of each layer pcb board arranges the lead end of PCB winding, each layer pcb board forms step structure at least in the lead end region, the lead end of each layer is arranged on the cascaded surface of respective layer pcb board.
Described step structure is the end limit step structure that is arranged on the whole end of the pcb board limit.Described end limit step structure is one-sided hierarchic structure, and the end limit of being deepened successively by the degree of depth on all pcb boards more than the pcb board of place, lead end region bottom consists of.Described end limit step structure is bilateral V-type hierarchic structure, and the end limit that the hierarchic structure of every side is deepened successively by the degree of depth on all pcb boards of this side of the most outstanding pcb board in place, lead end region consists of.
Described step structure is the unfilled corner formula step structure that is arranged on the pcb board angle.Described unfilled corner formula step structure is one-sided hierarchic structure, and the unfilled corner of being deepened successively by the degree of depth that arranges respectively on all pcb boards more than the pcb board of place, lead end region bottom consists of.Described unfilled corner formula step structure is bilateral V-type hierarchic structure, and the unfilled corner that the degree of depth that arranges respectively on the hierarchic structure of every side all pcb boards of this side by the most outstanding pcb board in place, lead end region is deepened successively consists of.
Described step structure is the U-shaped gap type step structure that is arranged on pcb board end limit or the side.Described gap type step structure is one-sided hierarchic structure, and the U-shaped breach that the degree of depth that is arranged respectively by all the pcb board edges more than the pcb board of lead end region place bottom is deepened successively consists of.Described gap type step structure is bilateral V-type hierarchic structure, and the U-shaped breach that the degree of depth that the hierarchic structure of every side is arranged respectively by all pcb board edges of this side of the most outstanding pcb board in lead end region place is deepened successively consists of.
The utility model proposes a kind of PCB flat surface transformer, improve to some extent in the structure of PCB winding, all winding leads ends are all exposed, the lead end that is easy to each layer of the identification problem that whether breaks down is convenient to maintenance; Owing to having saved via hole and via hole contact pin, can not bring the electric insulation problem between the via hole, security performance has had very large improvement, and design is more prone to; Saved the operations such as lead-in wire, via hole, processed also conveniently, production efficiency is higher.
Description of drawings
Fig. 1 is the flat surface transformer schematic diagram of prior art;
Fig. 2 is two-sided PCB winding schematic diagram;
Fig. 3 is the flat surface transformer schematic diagram of embodiment 1;
Fig. 4 is the flat surface transformer schematic diagram of embodiment 2;
Fig. 5 is the flat surface transformer schematic diagram of embodiment 3;
Fig. 6 is the interlayer insulating film schematic diagram.
Fig. 7 is the flat surface transformer schematic diagram of embodiment 4;
Fig. 8 is the flat surface transformer schematic diagram of embodiment 5;
Fig. 9 is the flat surface transformer schematic diagram of embodiment 6
Figure 10 is the flat surface transformer schematic diagram of embodiment 7.
Embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.
As shown in Figure 3, three layers of PCB winding stack, from bottom to top, the 3rd layer of PCB winding, second layer PCB winding, ground floor PCB winding are rectangle, the groove alignment at three layers of pcb board center, three limits alignment in the four edges of rectangle, in the end place, limit forms hierarchic structure, and namely upper strata PCB relatively and the inside indentation of the PCB of lower floor forms stepped, the cascaded surface subregion of lower floor's pcb board is exposed, the lead end (pad or contact pin pin) of this layer PCB winding is arranged on this exposes the zone.Like this, every pcb board winding leads end 41,42,43 all directly exposes, can be directly from the lead end outconnector to main circuit, need not via hole of the prior art and be communicated with connecting lead wire and the contact pin of via hole.
As other execution modes, four layers or more multi-layered PCB winding also can be used said structure.About the structure of magnetic core and with the annexation of PCB winding because same as the prior art, do not repeat them here.
Among the embodiment 1, staircase areas is arranged on the whole end limit (broadside of pcb board is such as Fig. 3) of pcb board, also can be arranged on different end limits or side (long leg beyond magnetic core covers the position divides), is illustrated in figure 4 as a kind of execution mode that is arranged on side.
Embodiment 3
End limit step structure among the embodiment 1 is one-sided hierarchic structure, and the end limit of being deepened successively by the degree of depth on all pcb boards more than the pcb board of place, lead end region bottom consists of.In the present embodiment, end limit step structure is bilateral V-type hierarchic structure, and the end limit that the hierarchic structure of every side is deepened successively by the degree of depth on all pcb boards of this side of the most outstanding pcb board in place, lead end region consists of.As shown in Figure 5, totally five layers of pcb board, the 3rd layer is the most outstanding pcb board in place, lead end region, the 3rd layer of pcb board upwards, the indentation of the relative lower floor of upper strata PCB winding, deepen successively on pcb board end limit; Downwards, the PCB of lower floor relative upper strata indentation, the pcb board end limit degree of depth is deepened successively.
Consist of pcb board single sided board or the double sided board of flat surface transformer PCB winding, adopt the pcb board winding structure of double sided board structure as shown in Figure 2.Upper strata coiling 45(heavy line) from an end helical form inwards around, at the most inboard another side that arrives PCB through via hole 48, be the coiling 46(of lower floor dotted line at the PCB another side), in the shape of a spiral outwards around, and draw the other end of coiling.This winding structure can all be designed into the lead end 45 of coiling the PCB outside, is convenient to draw, and what gone between on the same pcb board when having avoided adopting single sided board is overlapping.
When adopting the double sided board pcb board, need in the middle of two pcb boards, increase insulating barrier.Fig. 3, Fig. 4, Fig. 5, Fig. 7, Fig. 8, Fig. 9, Figure 10 all can adopt the pcb board of double sided board, but in order to clearly illustrate that the utility model point, do not draw insulating barrier among Fig. 3, Fig. 4, Fig. 5, Fig. 7, Fig. 8, Fig. 9, Figure 10.
Increase as shown in Figure 6 the flat surface transformer schematic diagram of interlayer insulating film.Flat surface transformer is made of the insulating barrier 11 between upper magnetic core 1, lower magnetic core 2, PCB winding 10 and PCB winding.In the middle of two pcb boards, increase without the blank pcb board that winds the line as insulating barrier 11, in order to carry out electric insulation.Blank pcb board is thicker, and dielectric strength is higher, but can cause volume of transformer to uprise.As improvement, in high-voltage applications, in order further to improve the dielectric strength between winding, can use thinner blank pcb board, and stick high voltage bearing insulating tape at blank pcb board, both improved dielectric strength, do not increase again the transformer height.
Embodiment 4
From embodiment 1 different being, each layer successively formed staircase areas of indentation only limits to the Si Jiaochu of PCB, thereby reduces the area of PCB.Formed step structure is the unfilled corner formula step structure that is arranged on the pcb board angle.Unfilled corner formula step structure is one-sided hierarchic structure, and the unfilled corner of being deepened successively by the degree of depth that arranges respectively on all pcb boards more than the pcb board of place, lead end region bottom consists of.The pcb board of bottom is the 3rd layer of pcb board, and the depth of the damaged vertex on it on pcb board is deepened successively.
As shown in Figure 7, offer at the place, two angles of pcb board one end unfilled corner form set out line end 51,52,53(pad or contact pin pin) staircase areas.Because PCB coiling generally all is loop configuration, four jiaos of the pcb board of rectangular configuration is the vacant position that does not have winding, and the pad design that will wind the line can take full advantage of this a slice space herein, and the length of pcb board and widely can not increase.
As other execution modes, unfilled corner can be arc or linear unfilled corner; Lead end can be located at respectively the Liang Jiaochu with pcb board, also lead end can be located at place, an angle.
Embodiment 5
From embodiment 4 different being, unfilled corner formula step structure is bilateral V-type hierarchic structure, and the unfilled corner that the degree of depth that arranges respectively on the hierarchic structure of every side all pcb boards of this side by the most outstanding pcb board in place, lead end region is deepened successively consists of.As shown in Figure 8, totally five layers of pcb board, the 3rd layer is the most outstanding pcb board in place, lead end region, the 3rd layer of pcb board upwards, the relative lower floor of the unfilled corner of the upper strata pcb board pcb board degree of depth is deepened successively; Downwards, the relative upper strata of the unfilled corner of the lower floor's pcb board pcb board degree of depth is deepened successively.
Embodiment 6
As can be seen from the above embodiments, each layer successively the formed staircase areas of indentation also can one of edge very among a small circle in, as long as this scope is greater than the shared area of lead end.In the present embodiment, step structure is the U-shaped gap type step structure that is arranged on the pcb board end limit.As other execution modes, U-shaped breach also can be arranged on the side.
The gap type step structure is one-sided hierarchic structure, and the U-shaped breach that the degree of depth that is arranged respectively by all the pcb board edges more than the pcb board of lead end region place bottom is deepened successively consists of, as shown in Figure 9.
Embodiment 7
From embodiment 6 different being, the gap type step structure is bilateral V-type hierarchic structure, the U-shaped breach that the degree of depth that the hierarchic structure of every side is arranged respectively by all pcb board edges of this side of the most outstanding pcb board in lead end region place is deepened successively consists of, as shown in figure 10.
Claims (10)
1. PCB flat surface transformer, comprise magnetic core and two-layer at least pcb board, the magnetic core spiral-lock is on pcb board, the edge of each layer pcb board arranges the lead end of PCB winding, it is characterized in that, each layer pcb board forms step structure at least in the lead end region, the lead end of each layer is arranged on the cascaded surface of respective layer pcb board.
2. a kind of PCB flat surface transformer according to claim 1 is characterized in that, described step structure is the end limit step structure that is arranged on the whole end of the pcb board limit.
3. a kind of PCB flat surface transformer according to claim 2 is characterized in that, described end limit step structure is one-sided hierarchic structure, and the end limit of being deepened successively by the degree of depth on all pcb boards more than the pcb board of place, lead end region bottom consists of.
4. a kind of PCB flat surface transformer according to claim 2, it is characterized in that, described end limit step structure is bilateral V-type hierarchic structure, and the end limit that the hierarchic structure of every side is deepened successively by the degree of depth on all pcb boards of this side of the most outstanding pcb board in place, lead end region consists of.
5. a kind of PCB flat surface transformer according to claim 1 is characterized in that, described step structure is the unfilled corner formula step structure that is arranged on the pcb board angle.
6. a kind of PCB flat surface transformer according to claim 5, it is characterized in that, described unfilled corner formula step structure is one-sided hierarchic structure, and the unfilled corner of being deepened successively by the degree of depth that arranges respectively on all pcb boards more than the pcb board of place, lead end region bottom consists of.
7. a kind of PCB flat surface transformer according to claim 5, it is characterized in that, described unfilled corner formula step structure is bilateral V-type hierarchic structure, and the unfilled corner that the degree of depth that arranges respectively on the hierarchic structure of every side all pcb boards of this side by the most outstanding pcb board in place, lead end region is deepened successively consists of.
8. a kind of PCB flat surface transformer according to claim 1 is characterized in that, described step structure is the U-shaped gap type step structure that is arranged on pcb board end limit or the side.
9. a kind of PCB flat surface transformer according to claim 8, it is characterized in that, described gap type step structure is one-sided hierarchic structure, and the U-shaped breach that the degree of depth that is arranged respectively by all the pcb board edges more than the pcb board of lead end region place bottom is deepened successively consists of.
10. a kind of PCB flat surface transformer according to claim 8, it is characterized in that, described gap type step structure is bilateral V-type hierarchic structure, and the U-shaped breach that the degree of depth that the hierarchic structure of every side is arranged respectively by all pcb board edges of this side of the most outstanding pcb board in lead end region place is deepened successively consists of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220427633.7U CN202713789U (en) | 2012-08-27 | 2012-08-27 | PCB planar transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220427633.7U CN202713789U (en) | 2012-08-27 | 2012-08-27 | PCB planar transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713789U true CN202713789U (en) | 2013-01-30 |
Family
ID=47594040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220427633.7U Expired - Lifetime CN202713789U (en) | 2012-08-27 | 2012-08-27 | PCB planar transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202713789U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791076A (en) * | 2012-08-27 | 2012-11-21 | 河南兵峰电子科技有限公司 | PCB (Printed Circuit Board) planar transformer |
| WO2024121127A1 (en) * | 2022-12-05 | 2024-06-13 | Aalborg Universitet | A planar winding assembly for power applications and a method of manufacturing such assembly |
-
2012
- 2012-08-27 CN CN201220427633.7U patent/CN202713789U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791076A (en) * | 2012-08-27 | 2012-11-21 | 河南兵峰电子科技有限公司 | PCB (Printed Circuit Board) planar transformer |
| CN102791076B (en) * | 2012-08-27 | 2014-09-03 | 河南兵峰电子科技有限公司 | PCB (Printed Circuit Board) planar transformer |
| WO2024121127A1 (en) * | 2022-12-05 | 2024-06-13 | Aalborg Universitet | A planar winding assembly for power applications and a method of manufacturing such assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
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| CX01 | Expiry of patent term |