CN201717110U - Intrinsically safe planar transformer - Google Patents
Intrinsically safe planar transformer Download PDFInfo
- Publication number
- CN201717110U CN201717110U CN 201020206338 CN201020206338U CN201717110U CN 201717110 U CN201717110 U CN 201717110U CN 201020206338 CN201020206338 CN 201020206338 CN 201020206338 U CN201020206338 U CN 201020206338U CN 201717110 U CN201717110 U CN 201717110U
- Authority
- CN
- China
- Prior art keywords
- layer
- printed circuit
- circuit board
- flat surface
- safe type
- 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.)
- Expired - Fee Related
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Classifications
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- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
Abstract
The utility model discloses an intrinsically safe planar transformer, which comprises a printed circuit board and a RM magnetic core. The printed circuit board adopts a multi-layer structure and is provided with a main insulating layer, a surface insulating layer arranged on the outer surface of the printed circuit board, a coil layer arranged on at least one side of the main insulating layer or the inner side of the surface insulating layer and a through hole penetrating through the multi-layer structure; and the RM magnetic core is provided with a cylinder which can be inserted in the through hole. The utility model has the advantages of compact structure, low power consumption and capability of preventing the electromagnetic interference. Therefore, the utility model is completely suitable for intrinsically safe barriers.
Description
Technical field
The utility model relates to field transformer, relates to a kind of essential safe type flat surface transformer in particular.
Background technology
In the design of intrinsic safe explosion-proof system, the intrinsic safety type guard grating is mounted in harbor and contains intrinsically safe circuit and the device of non-intrinsically safe circuit, specifically be to limit the energy that is sent to on-the-spot intrinsic safety loop by current limliting and pressure limiting circuit, thereby the dangerous energy that prevents non-intrinsically safe circuit seals in the intrinsically safe circuit, the intrinsic safety type guard grating is called associate device in the intrinsic safe explosion-proof system, be the important component part of intrinsic safety system, and one of core component that plays the ability transmission in the guard grating circuit is the transformer as magnetic device.
The essential safe type transformer must be observed and is the definite various standards of essential safety equipment to cause beyond measure infringement to avoid equipment, personnel and production to the user; Specifically see also " GB3836.4---2000 explosive gas atmosphere electrical appliance equipment, the 4th part: essential safe type " i " " standard, for guaranteeing the isolation fully between intrinsically safe circuit and the non-intrinsically safe circuit, intrinsically safe circuit and non-intrinsically safe circuit solid insulation need 1mm at least, electric clearance must be greater than 6mm, airborne creepage distance needs 10mm at least, so also must observe above standard between the intrinsic safety coil of transformer and the non-intrinsic safety coil.
Existing intrinsic safety type guard grating, it adopts tradition around the formula transformer usually.Tradition wire wound transformer is formed by the axial coiling of FERRITE CORE, transformer framework and enamelled wire usually.But in order to make it be applied in explosion-proof occasion, it must come coiling according to above explosion-proof criteria, so it can have following defective usually: the degree of coupling between the coil is low, power consumption is big, projected current is little, be easy to generate electromagnetic interference and bulky.In addition, make by hand,, be difficult to adopt automation to be installed so the parameter discrete of transformer is bigger because the mode of axial coiling mainly relies on.So in the face of this space of intrinsic safety type guard grating, highly, when energy, heat radiation, safety all have strict restriction, traditional wire wound transformer will no longer have practicality.
In view of this, the inventor has this case to produce at the above-mentioned defective further investigation of existing essential safe type transformer then.
The utility model content
The purpose of this utility model is to provide a kind of essential safe type flat surface transformer, with the problem that solves be applied in the prior art that transformer has in the intrinsic safety type guard grating bulky, power consumption big and be easy to generate electromagnetic interference.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of essential safe type flat surface transformer wherein, comprising:
Printed circuit board is multilayer shape structure, and has main insulating layer, the apparent surface insulation layer of printed circuit board is set, is arranged on main insulating layer or the coil layer of surface insulation layer inboard and the through hole that connects this multilayer shape structure at least on one side;
The RM magnetic core has for the cylinder that inserts in this through hole.
Further, this main insulating layer has multilayer, and extends between adjacent two main insulating layers and from the printed circuit panel edges and do not buried coil layer in the plate in the preset distance.
Further, also be provided with the supplemental dielectric layer thin between this adjacent lines ring layer than main insulating layer.
Further, this RM magnetic core is two of involutory setting, and this each RM magnetic core all has cylinder, and two cylinders insert this through hole from both direction respectively, and inserts that the end face of these two cylinders fits like a glove continuous behind the through hole.
Further, also be provided with the clamp that RM magnetic core and printed circuit board are firmly fastened between these two RM magnetic cores.
Further, this surface insulation layer is at least half insulating barrier of main insulating layer for insulation green oil layer or thickness.
Further, also be provided with via hole on this printed circuit board, this via hole links to each other with coil layer in the printed circuit board respectively.
Further, also be provided with blind hole or the buried via hole that interconnects for coil layer in this printed circuit board.
After adopting said structure, a kind of essential safe type flat surface transformer that the utility model relates to, the cylinder of this RM magnetic core promptly constitutes the magnetic core of the utility model flat surface transformer, coil layer in the printed circuit board then constitutes the winding of the utility model flat surface transformer, and this coil layer is radially coiling with respect to this cylinder, be that winding is that multilayer printed circuit board is repeatedly around forming, so the high-frequency core that winding changes on the plane is on the RM magnetic core and the magnetic loop of formation transformer.This design has low direct current copper resistance, low leakage inductance and distributed capacitance, can satisfy the designing requirement of resonant circuit from the performance of transformer, and because the good magnetic screen of magnetic core can suppress radio frequency interference.The utility model has abandoned the skeleton of traditional type transformation from structure, makes its structure compact more, and can require its internal structure of design in strict accordance with above explosion-proof criteria, makes it be useful for utilization in the intrinsic safety type guard grating fully.
Description of drawings
The three-dimensional exploded view of a kind of essential safe type flat surface transformer first preferred embodiment that Fig. 1 relates to for the utility model;
Fig. 2 is the sectional view of printed circuit board among Fig. 1;
Fig. 3 is the plane graph of printed circuit board among Fig. 1;
Fig. 4 is the structural representation of printed circuit board coil layer and magnetic core assembling among Fig. 1;
Fig. 5 is the combination stereogram of Fig. 1;
Fig. 6 is that the utility model first preferred embodiment is applied in the electrical principle schematic diagram in the intrinsic safety barriter;
The three-dimensional exploded view of a kind of essential safe type flat surface transformer second preferred embodiment that Fig. 7 relates to for the utility model;
Fig. 8 is the sectional view of printed circuit board among Fig. 7;
Fig. 9 is the plane graph of printed circuit board among Fig. 7;
Figure 10 is the structural representation of printed circuit board coil layer and magnetic core assembling among Fig. 7;
Figure 11 is the combination stereogram of Fig. 7;
Figure 12 is that the utility model second preferred embodiment is applied in the electrical principle schematic diagram in the intrinsic safety barriter.
Among the figure:
Flat surface transformer 100 printed circuit boards 1
Supplemental dielectric layer 10
Supplemental dielectric layer 10a, 10b, 10c, 10d
Main insulating layer 11
Main insulating layer 11a, 11b, 11c
Via hole 12
Via hole 12a, 12b, 12c, 12d, 12e, 12f
Through hole 13
Coil layer L
Coil layer L1, L2, L3, L4, L5, L6, L7, L8
Surface insulation layer S
Green oil layer S1, S2
Preset distance D
Main insulating layer 22
Supplemental dielectric layer 20a, 20b
Coil layer X
Coil layer X1, X2, X3, X4
RM magnetic core 3 cylinders 31
Hook part 321
Embodiment
In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.
As Fig. 1 to shown in Figure 6, first preferred embodiment of a kind of essential safe type flat surface transformer 100 that relates to for the utility model shown in it, this essential safe type flat surface transformer 100 comprises printed circuit board 1 and RM magnetic core 3, wherein:
This printed circuit board 1, be multilayer shape structure, and have main insulating layer 11, surface insulation layer S, coil layer L and a through hole 13, this surface insulation layer S is provided with printed circuit board 1 in appearance, this coil layer L is arranged on main insulating layer 11 one side or surface insulation layer S inboard at least, and this through hole 13 connects these multilayer shape structures;
This RM magnetic core 3 has for the cylinder 31 that inserts in this through hole, and this RM magnetic core 3 specifically is to adopt common RM FERRITE CORE, and it is made by high-frequency power ferrite material.
Concrete scheme as present embodiment specifically please refer to shown in Figure 2:
Main insulating layer 11 in this printed circuit board comprises and is upper and lower to three layers of 11a that are provided with, 11b and 11c, this coil layer L then has eight L1, L2, L3, L4, L5, L6, L7 and L8, and be relative in twos shape, and also be provided with supplemental dielectric layer 10 between this coil layer L facing each other, promptly have four supplemental dielectric layer 10a, 10b, 10c and 10d, and the thickness of this supplemental dielectric layer 10 is thinner than main insulating layer 11, concrete, be provided with supplemental dielectric layer 10a between this coil layer L1 and the coil layer L2, be provided with supplemental dielectric layer 10b between this coil layer L3 and the coil layer L4, be provided with supplemental dielectric layer 10c between this coil layer L5 and the coil layer L6, be provided with supplemental dielectric layer 10d between this coil layer L7 and the coil layer L8; This surface insulation layer S is two layers of thin green oil layer S1 and the S2 for being separately positioned on two ends then, and it can also be at least half insulating barrier of main insulating layer 11 for thickness certainly; At this moment, four groups of coil layer of this L3 to L6 extend to from printed circuit board 1 edge has not buried coil layer in the preset distance D in the plate, this preset distance D selects for use in the present embodiment and is 1mm, and promptly the area coverage of this coil layer L3 to L6 is less than the area coverage of coil layer L1, L2 and L7 and L8; As Fig. 3, Fig. 4 and shown in Figure 5, also be provided with six via holes 12 on this printed circuit board 1, promptly be respectively via hole 12a, via hole 12b, via hole 12c, via hole 12d, via hole 12e and via hole 12f, above-mentioned via hole 12 is as linking to each other with coil layer L in the printed circuit board 1.In addition, in the present embodiment, also be provided with two blind hole (not shown)s and two buried via hole (not shown)s in this printed circuit board 1, this blind hole and buried via hole all are used for the interconnection between the coil layer L.Concrete, one of them buried via hole is used for coil layer L1 is linked to each other with coil layer L2, and the terminal point of this coil layer L1 and coil layer L2 is connected on via hole 12a and the via hole 12b; The another one buried via hole is used for coil layer L7 is linked to each other with coil layer L8, and the terminal point of this coil layer L7 and coil layer L8 is connected on via hole 12a and the via hole 12b, thereby the mode of twining by two-wire realizes close coupling; And this coil layer L3 is connected by blind hole with L4, and its terminal point then is connected on via hole 12c and the via hole 12d, and this coil layer L5 is connected by blind hole with L6, and its terminal point then is connected on via hole 12e and the via hole 12f; In the present embodiment promptly, this coil layer L1, L2, L7 and L8 have constituted elementary winding, and this coil layer L3 and L4 constitute first secondary winding, and this coil layer L5 and L6 constitute the second subprime winding; Electrical schematic diagram when specifically please refer to present embodiment shown in Figure 6 and specifically using;
This RM magnetic core 3 in the present embodiment, is two of involutory setting, and this each RM magnetic core 3 all has cylinder 31, and two cylinders 31 insert this through hole 13 from both direction respectively, and inserts that the end face 311 of these two cylinders 31 fits like a glove continuous behind the through hole 13.In order to guarantee that further whole flat surface transformer 100 can have stable structure, also be provided with the clamp 32 that RM magnetic core 3 and printed circuit board 1 are firmly fastened between these two RM magnetic cores 3, specifically, this clamp 32 is two that are oppositely arranged, and it is stuck on the edge of RM magnetic core 3 by the hook part 321 at clamp 32 two ends respectively.
Extremely shown in Figure 12 as Fig. 7, second preferred embodiment of a kind of essential safe type flat surface transformer 100 that relates to for the utility model shown in it, flat surface transformer 100 its basic structures that wherein relate to are all consistent with first preferred embodiment, so do not describe once more, its difference is the composition in printed circuit board 1 profile and layer structure, main insulating layer 22 in this printed circuit board 1 is set to one deck, but this surface insulation layer 22a and 22b also adopt the identical material of main insulating layer 22, need to prove, the thickness of this surface insulation layer 22a and 22b only is required to be the over half of main insulating layer 22 and gets final product, and need not the shown same thickness of picture accompanying drawing; In addition, in the present embodiment, this coil layer X only has four layers of X1, X2, X3 and X4; And be provided with supplemental dielectric layer 20a between coil layer X1 and the X2, and be provided with supplemental dielectric layer 20b between coil layer X3 and the X4; Equally, it can not bury coil layer in preset distance D, this D also selects 1mm for use, in addition, the printed circuit board in the present embodiment also comprises 4 buried blind via (not shown)s, and it satisfies and also forms centre cap when coil layer X1 links to each other with X2, satisfying coil layer X3 links to each other with X4 and also forms centre cap, wherein via hole 12b promptly links to each other with the external world as centre cap with via hole 12e, and the electrical schematic diagram that it is concrete please refer to shown in Figure 12.
Need to prove that the utility model is not limited to above-mentioned two embodiment, promptly being provided with all of the setting of the number of plies of main insulating layer, coil layer and buried blind via can be provided with according to concrete design needs.
In sum, a kind of essential safe type flat surface transformer 100 that the utility model relates to, the cylinder 31 of this RM magnetic core 3 promptly constitutes the magnetic core of the utility model flat surface transformer 100, coil layer L in the printed circuit board 1 then constitutes the winding of the utility model flat surface transformer 100, and this coil layer L is radially coiling with respect to this cylinder 31, be that winding is that multilayer printed circuit board is repeatedly around forming, so the high-frequency core that winding changes on the plane is on the RM magnetic core 3 and the magnetic loop of formation flat surface transformer 100.This design has low direct current copper resistance, low leakage inductance and distributed capacitance, can satisfy the designing requirement of resonant circuit from the performance of transformer, and because the good magnetic screen of magnetic core can suppress radio frequency interference.Abandoned the skeleton of traditional type transformation from structure, made its structure compact more, and can require its internal structure of design, made it be useful for utilization in the intrinsic safety type guard grating fully in strict accordance with above explosion-proof criteria.
The foregoing description and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.
Claims (8)
1. an essential safe type flat surface transformer is characterized in that, comprising:
Printed circuit board is multilayer shape structure, and has main insulating layer, the apparent surface insulation layer of printed circuit board is set, is arranged on main insulating layer or the coil layer of surface insulation layer inboard and the through hole that connects this multilayer shape structure at least on one side;
The RM magnetic core has for the cylinder that inserts in this through hole.
2. a kind of essential safe type flat surface transformer as claimed in claim 1 is characterized in that this main insulating layer has multilayer, and extends between adjacent two main insulating layers and from the printed circuit panel edges and do not buried coil layer in the plate in the preset distance.
3. a kind of essential safe type flat surface transformer as claimed in claim 1 is characterized in that, also is provided with the supplemental dielectric layer thin than main insulating layer between this adjacent lines ring layer.
4. a kind of essential safe type flat surface transformer as claimed in claim 1, it is characterized in that, this RM magnetic core is two of involutory setting, this each RM magnetic core all has cylinder, and two cylinder insert this through hole from both direction respectively, and insert that the end face of these two cylinders fits like a glove continuous behind the through hole.
5. a kind of essential safe type flat surface transformer as claimed in claim 4 is characterized in that, also is provided with the clamp that RM magnetic core and printed circuit board are firmly fastened between these two RM magnetic cores.
6. a kind of essential safe type flat surface transformer as claimed in claim 1 is characterized in that, this surface insulation layer is at least half insulating barrier of main insulating layer for insulation green oil layer or thickness.
7. a kind of essential safe type flat surface transformer as claimed in claim 1 is characterized in that, also is provided with via hole on this printed circuit board, and this via hole links to each other with coil layer in the printed circuit board respectively.
8. a kind of essential safe type flat surface transformer as claimed in claim 1 is characterized in that, also is provided with blind hole or buried via hole for the coil layer interconnection in this printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020206338 CN201717110U (en) | 2010-05-21 | 2010-05-21 | Intrinsically safe planar transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020206338 CN201717110U (en) | 2010-05-21 | 2010-05-21 | Intrinsically safe planar transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717110U true CN201717110U (en) | 2011-01-19 |
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ID=43463117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020206338 Expired - Fee Related CN201717110U (en) | 2010-05-21 | 2010-05-21 | Intrinsically safe planar transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717110U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490117A (en) * | 2011-11-28 | 2012-06-13 | 无锡斯贝尔磁性材料有限公司 | Grinder bottom fixture of RM-type magnetic core |
| WO2014094841A1 (en) * | 2012-12-19 | 2014-06-26 | Telefonaktiebolaget L M Ericsson (Publ) | Planar transformer |
| CN105009235A (en) * | 2013-01-22 | 2015-10-28 | 菲尼克斯电气公司 | Printed circuit board having layer structure |
| CN107768104A (en) * | 2017-12-09 | 2018-03-06 | 中国电子科技集团公司第四十三研究所 | A kind of preparation method of LTCC flat surface transformers |
| CN104584153B (en) * | 2012-08-22 | 2018-03-16 | 菲尼克斯电气公司 | Level conveyor |
| CN104752044B (en) * | 2013-12-27 | 2018-03-27 | 上海辰竹仪表有限公司 | A kind of explosiveproof isolation transformer |
-
2010
- 2010-05-21 CN CN 201020206338 patent/CN201717110U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490117A (en) * | 2011-11-28 | 2012-06-13 | 无锡斯贝尔磁性材料有限公司 | Grinder bottom fixture of RM-type magnetic core |
| CN102490117B (en) * | 2011-11-28 | 2014-08-20 | 无锡斯贝尔磁性材料有限公司 | Grinder bottom fixture of RM-type magnetic core |
| CN104584153B (en) * | 2012-08-22 | 2018-03-16 | 菲尼克斯电气公司 | Level conveyor |
| WO2014094841A1 (en) * | 2012-12-19 | 2014-06-26 | Telefonaktiebolaget L M Ericsson (Publ) | Planar transformer |
| CN104854666A (en) * | 2012-12-19 | 2015-08-19 | 瑞典爱立信有限公司 | Planar transformer |
| US9576717B2 (en) | 2012-12-19 | 2017-02-21 | Telefonaktiebolaget L M Ericsson (Publ) | Planar transformer |
| EP3147916A1 (en) * | 2012-12-19 | 2017-03-29 | Telefonaktiebolaget LM Ericsson (PUBL) | Method of forming a multi-layered pcb planar transformer |
| KR101735979B1 (en) * | 2012-12-19 | 2017-05-29 | 텔레폰악티에볼라겟엘엠에릭슨(펍) | Planar Transformer |
| CN104854666B (en) * | 2012-12-19 | 2018-03-30 | 瑞典爱立信有限公司 | Flat surface transformer |
| CN105009235A (en) * | 2013-01-22 | 2015-10-28 | 菲尼克斯电气公司 | Printed circuit board having layer structure |
| CN104752044B (en) * | 2013-12-27 | 2018-03-27 | 上海辰竹仪表有限公司 | A kind of explosiveproof isolation transformer |
| CN107768104A (en) * | 2017-12-09 | 2018-03-06 | 中国电子科技集团公司第四十三研究所 | A kind of preparation method of LTCC flat surface transformers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20130521 |