CN219303430U - Transformer device - Google Patents
Transformer device Download PDFInfo
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- CN219303430U CN219303430U CN202320396641.8U CN202320396641U CN219303430U CN 219303430 U CN219303430 U CN 219303430U CN 202320396641 U CN202320396641 U CN 202320396641U CN 219303430 U CN219303430 U CN 219303430U
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- transformer
- magnetic core
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- absorbing layer
- stress absorbing
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Abstract
The present utility model provides a transformer apparatus comprising: a substrate; a transformer disposed on the substrate; the stress absorbing layer is arranged on the outer surface of the transformer; the encapsulating body is arranged on the substrate and coats the stress absorbing layer and the transformer, so that the stress absorbing layer is arranged between the transformer and the encapsulating body. According to the utility model, the stress absorption layer arranged between the transformer and the potting body at the rear end can effectively absorb stress generated when the potting body expands with heat and contracts with cold, so that the stress applied to the magnetic core of the transformer is greatly reduced, the extrusion damage of the potting body stress to the magnetic core of the transformer can be further reduced, and the structural stability of the transformer device is improved.
Description
Technical Field
The utility model relates to the technical field of power conversion, in particular to a transformer device.
Background
At present, various power electronic devices are widely applied to the fields of aviation, communication, industry, national defense, household and the like, and realize the function of electric energy conversion. The isolated power conversion equipment has the primary and secondary isolation function, is safer, is widely and flexibly applied, and the transformer is used as a core device for realizing mutual isolation between two ends of input and output, so that high reliability and stability of the transformer are required to be ensured.
Meanwhile, the current power electronic equipment has the trend of miniaturization and high power density, which means that the electronic components selected by the equipment are necessarily miniaturized, and the interior of the power electronic equipment is usually encapsulated to enhance the heat dissipation capacity due to higher heat productivity. Therefore, the small transformer in the common power supply product is contacted with the pouring sealant except one surface of the small transformer is adhered to the substrate.
However, in a high-low temperature environment, the transformer core is subjected to stress caused by thermal expansion and contraction of pouring sealant, and the situation that the transformer core is cracked is likely to occur, and the failure is more likely to occur in a small transformer. This failure can lead to changes in circuit parameters, reduced system reliability, and in severe cases, system failure.
Therefore, a technical solution for preventing stress from damaging the small transformer is needed.
Disclosure of Invention
In order to solve the problem that the small transformer is cracked due to the influence of surrounding pouring sealant stress in a high-low temperature state, the utility model provides the small transformer device, wherein a stress absorbing layer is additionally arranged between the transformer and the back-end pouring sealant, and the stress applied to a magnetic core of the transformer by the pouring sealant is absorbed by the stress absorbing layer so as to reduce the extrusion damage of the pouring sealant to the magnetic core of the transformer.
In order to achieve the above object and other related objects, the present utility model provides the following technical solutions.
A transformer apparatus, comprising:
a substrate;
a transformer disposed on the substrate;
the stress absorbing layer is arranged on the outer surface of the transformer;
the encapsulating body is arranged on the substrate and coats the stress absorbing layer and the transformer, so that the stress absorbing layer is arranged between the transformer and the encapsulating body.
Optionally, the substrate includes a front surface and a back surface that are disposed opposite to each other, and the transformer and the potting are disposed on the front surface of the substrate.
Optionally, a rewiring layer is disposed inside the substrate, a first bonding pad is disposed on the front side of the substrate, a second bonding pad is disposed on the back side of the substrate, a plurality of first bonding pads are electrically connected with a plurality of second bonding pads in one-to-one correspondence through the rewiring layer, 2N winding terminals of the transformer are electrically connected with 2N first bonding pads in one-to-one correspondence, and N is an integer greater than or equal to 2.
Optionally, the transformer includes:
a magnetic core disposed on the substrate;
the framework is sleeved on the central column of the magnetic core;
the winding is wound on the framework, and the terminals of the winding are led out from the opening of the magnetic core;
the magnetic core window sealing glue is adhered to the opening of the magnetic core so as to seal the inside of the magnetic core.
Optionally, the magnetic core includes at least:
can-type magnetic cores, E-type magnetic cores, EC-type magnetic cores, RM-type magnetic cores, and PQ-type magnetic cores.
Optionally, the magnetic core includes two sub-magnetic cores arranged in a stack.
Optionally, the windings comprise a set of primary windings and at least one set of secondary windings.
Optionally, the stress absorbing layer is further disposed on an outer surface of the magnetic core window sealant.
Optionally, the material of the magnetic core window sealing glue at least comprises an organic heat conducting glue adhesive SE4450.
Optionally, the material of the stress absorbing layer at least comprises a heat conducting insulating tape.
As described above, the transformer device provided by the utility model has at least the following beneficial effects:
through the stress absorbing layer arranged between the transformer and the potting body (or potting adhesive) at the rear end, the stress generated when the potting body expands with heat and contracts with cold can be effectively absorbed, the stress applied to the magnetic core of the transformer by transmission is greatly reduced, the extrusion damage of the potting body stress to the magnetic core of the transformer can be further reduced, and the structural stability of the transformer device is improved.
Drawings
Fig. 1 is a partial perspective view of a transformer apparatus according to the present utility model.
Fig. 2 shows a section A-A of fig. 1.
Description of the reference numerals
1-base plate, 2-transformer, 3-stress absorbing layer, 21-magnetic core, 21 a-sub-magnetic core, 21 b-sub-magnetic core, 22-skeleton, 23-winding, 24-magnetic core window sealing glue, a-split line.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.
Please refer to fig. 1-2. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims.
Moreover, it is to be understood that the spatial descriptions (e.g., above, below, above, left, right, below, top, bottom, vertical, horizontal, etc.) used herein are for illustrative purposes only, and that the actual implementation of the structures described herein may be spatially arranged in any orientation or manner.
As described in the foregoing background, the inventors have studied to find: aiming at the current small-sized transformer, when pouring sealant expands with heat and contracts with cold in an extremely high-low temperature environment, the part of the pouring sealant contacted with the magnetic core can cause enough stress on the magnetic core to cause the magnetic core to crack; the prior art only relates to evacuating heat emitted by the transformer, but does not relate to evacuating and absorbing stress of pouring sealant in direct contact with the magnetic core, and does not solve the problem of stress extrusion of the pouring sealant on the magnetic core of the transformer in an extremely high and low temperature environment.
Based on this, the utility model provides a technical solution for a small-sized transformer device: a magnetic core window sealing adhesive is additionally arranged at the opening of the magnetic core of the transformer, the magnetic core is sealed, and a potting body (or potting adhesive) at the rear end is prevented from entering the magnetic core; meanwhile, a stress absorbing layer is arranged between the transformer and the potting body, and stress generated when the potting body expands and contracts due to heat is absorbed through the stress absorbing layer arranged outside the magnetic core and outside the magnetic core window sealing glue, so that extrusion damage of the stress of the potting body to the magnetic core of the transformer is reduced, and the structural stability of the transformer device is improved.
In detail, as shown in fig. 1, the present utility model provides a transformer apparatus comprising:
a substrate 1;
a transformer 2 disposed on the substrate 1;
a stress absorbing layer 3 provided on an outer surface of the transformer 2;
a potting body (not shown in the drawings) is disposed on the substrate 1 and encapsulates the stress absorbing layer 3 and the transformer 2 such that the stress absorbing layer 3 is disposed between the transformer 2 and the potting body.
It should be noted that the embodiment shown in fig. 1 is a perspective view of the transformer apparatus, in which the windings 23 are hidden in the perspective view, and the sub-core 21b, the core window sealing glue 24, and half of the stress absorbing layer 3 of the upper half of the transformer 2 are hidden in order to more clearly show the specific structure of the present example.
Fig. 2 is a section A-A of fig. 1. As can be seen from fig. 1 and 2, the transformer 2 is composed of a magnetic core 21, a frame 22, a winding 23, and a magnetic core window sealing glue 24, wherein the magnetic core 21 is composed of an upper sub-magnetic core 21a and a lower sub-magnetic core 21b which are of similar specifications, and the winding 23 is composed of a primary winding and a secondary winding.
In detail, as shown in fig. 1-2, the substrate 1 includes a front surface and a back surface that are disposed opposite to each other, and the transformer 2 and the potting (not shown) are disposed on the front surface of the substrate 1.
In more detail, a rewiring layer (not shown in the figure) is disposed inside the substrate 1, a first bonding pad (not shown in the figure) is disposed on the front surface of the substrate 1, a second bonding pad (not shown in the figure) is disposed on the back surface of the substrate 1, the plurality of first bonding pads are electrically connected with the plurality of second bonding pads in one-to-one correspondence through the rewiring layer, 2N winding terminals of the transformer 2 are electrically connected with the 2N first bonding pads in one-to-one correspondence, and N is an integer greater than or equal to 2.
In detail, as shown in fig. 1 to 2, the transformer 2 includes:
a magnetic core 21 provided on the substrate 1;
a frame 22 sleeved on the center column of the magnetic core 21;
a winding 23 wound around the bobbin 22, the terminal of which is led out from the opening of the magnetic core 21;
the core window sealing glue 24 is adhered to the opening of the core 21 to seal the interior of the core 21.
More specifically, the core 21 includes at least a commonly used core such as a pot core, an E core, an EC core, an RM core, and a PQ core; the core 21 includes two sub-cores, namely, a sub-core 21a and a sub-core 21b as shown in fig. 2, which are stacked.
In more detail, the winding 23 includes a set of primary windings and at least one set of secondary windings, that is, the winding 23 may include a set of primary windings and a set of secondary windings, the winding 23 may further include a set of primary windings, two or more sets of secondary windings, the winding 23 includes a set of primary windings and N-1 sets of secondary windings, and a total of N windings are led out of 2N winding terminals.
In more detail, as shown in fig. 1 to 2, in addition to being disposed on the outer surface of the transformer 2, a stress absorbing layer 3 is disposed on the outer surface of the core window molding 24 to perform stress isolation absorption to the weak place of the transformer 2. The material of the magnetic core window sealing glue 24 at least comprises an organic heat conducting glue adhesive SE4450 or other similar glue, and the material of the stress absorbing layer 3 at least comprises a heat conducting insulating tape or other isolating layers, such as polyimide film or polyimide film tape.
It should be emphasized that the stress absorbing layer 3 is at least disposed on a side surface of the transformer 2, covers the core window sealing glue 24 and the exposed side surface portion of the magnetic core 21, and the stress absorbing layer 3 may be disposed on a top portion of the transformer 2, and covers the top portion of the magnetic core 21, which is not limited herein; the stress absorbing layer 3 can be a tape winding device or a liquid glue coating device, and details can be seen in the prior art, and are not described herein.
The manufacturing process of the transformer device comprises the following steps: winding 23 (including primary winding and secondary winding) is wound on skeleton 22, skeleton 22 is sleeved on central columns of sub-magnetic cores 21a and 21b, sub-magnetic cores 21a and 21b are adhered to form an integral magnetic core 21 and fixed on the front surface of substrate 1, magnetic core window sealing glue 24 is driven into the opening of magnetic core 21, solidification is completed, and stress absorbing layer 3 is arranged outside magnetic core 21 and magnetic core window sealing glue 24. Of course, the manufacturing process further includes the steps of leading out the winding terminals of the transformer 2 to the back surface of the substrate 1 and finally performing potting protection by using a potting adhesive to form a potting body, which is not described herein again.
In the manufacturing process of the transformer device provided by the utility model, the magnetic core window sealing glue 24 is used for sealing windows immediately after the magnetic core 21 is bonded, so that the external pouring sealant is prevented from entering the magnetic core 21, the stress absorbing layer 3 is additionally arranged, the direct contact between the magnetic core 21 and the external pouring sealant is avoided, the surface of the stress absorbing layer 3 is smoother, the adhesion of the pouring sealant can be effectively reduced, and the stress applied by the pouring sealant (or a pouring body) is absorbed through the stress absorbing layer 3, so that the function of protecting the magnetic core 21 from cracking is realized.
In summary, in the transformer device provided by the utility model, the magnetic core window sealing glue is added at the opening of the magnetic core of the transformer to seal the magnetic core, so that the potting body (or potting adhesive) at the rear end is prevented from entering the interior of the magnetic core; meanwhile, a stress absorbing layer is arranged between the transformer and the potting body, stress generated when the potting body expands with heat and contracts with cold is absorbed through the stress absorbing layer arranged outside the magnetic core and outside the magnetic core window sealing glue, the situation that the magnetic core of the transformer cracks due to expansion with heat and contraction with cold under the action of the external potting glue is avoided to the greatest extent, and the structural stability of the transformer device is improved.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A transformer apparatus, comprising:
a substrate;
a transformer disposed on the substrate;
the stress absorbing layer is arranged on the outer surface of the transformer;
the encapsulating body is arranged on the substrate and coats the stress absorbing layer and the transformer, so that the stress absorbing layer is arranged between the transformer and the encapsulating body.
2. The transformer device of claim 1, wherein the substrate comprises oppositely disposed front and back sides, the transformer and the potting are disposed on the front side of the substrate.
3. The transformer device according to claim 2, wherein a rewiring layer is provided inside the substrate, a first bonding pad is provided on the front surface of the substrate, a second bonding pad is provided on the back surface of the substrate, a plurality of the first bonding pads are electrically connected with a plurality of the second bonding pads in one-to-one correspondence through the rewiring layer, 2N winding terminals of the transformer are electrically connected with 2N of the first bonding pads in one-to-one correspondence, and N is an integer greater than or equal to 2.
4. The transformer arrangement according to claim 1, wherein the transformer comprises:
a magnetic core disposed on the substrate;
the framework is sleeved on the central column of the magnetic core;
the winding is wound on the framework, and the terminals of the winding are led out from the opening of the magnetic core;
the magnetic core window sealing glue is adhered to the opening of the magnetic core so as to seal the inside of the magnetic core.
5. The transformer apparatus of claim 4, wherein the magnetic core comprises at least:
can-type magnetic cores, E-type magnetic cores, EC-type magnetic cores, RM-type magnetic cores, and PQ-type magnetic cores.
6. The transformer apparatus of claim 4, wherein the core comprises two sub-cores arranged in a stack.
7. The transformer apparatus of claim 4, wherein the windings comprise a set of primary windings and at least one set of secondary windings.
8. The transformer apparatus of claim 4, wherein the stress absorbing layer is further disposed on an outer surface of the core window molding.
9. The transformer apparatus of claim 4, wherein the material of the core window sealant comprises at least an organic heat conductive adhesive SE4450.
10. The transformer apparatus of claim 4, wherein the stress absorbing layer comprises at least a thermally conductive insulating tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320396641.8U CN219303430U (en) | 2023-03-06 | 2023-03-06 | Transformer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320396641.8U CN219303430U (en) | 2023-03-06 | 2023-03-06 | Transformer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219303430U true CN219303430U (en) | 2023-07-04 |
Family
ID=86959041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320396641.8U Active CN219303430U (en) | 2023-03-06 | 2023-03-06 | Transformer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219303430U (en) |
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2023
- 2023-03-06 CN CN202320396641.8U patent/CN219303430U/en active Active
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