Electronic transformer framework

Abstract

The utility model discloses an electronic transformer framework which comprises a center magnetic column, a through hole is formed in the center magnetic column in the length direction of the center magnetic column, a plurality of first heat dissipation holes are formed in the peripheral side of the center magnetic column, and hollow radial supporting strips are further vertically arranged on the peripheral side of the center magnetic column in a covering mode and arranged on the first heat dissipation holes. A plurality of second heat dissipation holes are formed in the two opposite sides of the hollow radial supporting strips respectively. The defects that in the prior art, heat dissipation holes are directly formed in the peripheral side of a center magnetic column, insulating layers between an iron core and a winding can be reduced, local stress concentration can be possibly formed, particularly under the condition of high temperature or large transformer working load, insulating materials can be possibly broken, and the performance and the service life of a transformer are affected are overcome. According to the electronic transformer framework, the heat dissipation holes are formed in the peripheral side of the center magnetic column, and meanwhile turn-to-turn short circuit can be avoided as much as possible.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to an electronic transformer frame. Background Technology

[0002] The transformer bobbin is a crucial component of a transformer. It not only provides space for the transformer conductors to be wound but also often serves to fix the magnetic core and support the shape of the transformer body. However, in existing technology, some transformer bobbins, in order to meet more functional requirements, suffer from complex structures, which affects the heat dissipation of the bobbin and consequently reduces the transformer's lifespan.

[0003] Chinese Patent No. CN202420974196.3 discloses a transformer frame and a transformer. By setting several heat dissipation holes around the central magnetic column, the heat dissipation performance of the transformer frame is improved, thereby improving the reliability and service life of the transformer.

[0004] The applicant discovered the following technical problems when implementing the above-mentioned technical solution:

[0005] Setting heat dissipation holes directly around the central magnetic column reduces the insulation layer between the core and the winding, which may lead to local stress concentration. Especially under high temperature or high transformer operating load, this may cause the insulation material to crack, affecting the transformer's performance and lifespan.

[0006] Therefore, providing an electronic transformer frame that can minimize inter-turn short circuits while providing heat dissipation holes around the central magnetic column is a problem that this utility model urgently needs to solve. Utility Model Content

[0007] To address the aforementioned technical problems, the purpose of this invention is to overcome the limitations of existing technologies where heat dissipation holes are directly placed around the central magnetic column. This reduces the insulation layer between the core and windings, potentially leading to localized stress concentrations, especially under high temperatures or heavy transformer loads, which could cause insulation material cracking and affect transformer performance and lifespan. Therefore, this invention provides an electronic transformer frame that, while incorporating heat dissipation holes around the central magnetic column, minimizes the risk of inter-turn short circuits.

[0008] To achieve the above objectives, this utility model provides an electronic transformer frame, which includes a central magnetic column. The central magnetic column has a through hole along its length and a plurality of first heat dissipation holes on its periphery. Hollow radial support bars are also vertically mounted on each of the first heat dissipation holes on the periphery of the central magnetic column. A plurality of second heat dissipation holes are respectively provided on the opposite sides of the hollow radial support bars.

[0009] Preferably, the edges of the first and second heat dissipation holes are chamfered.

[0010] Preferably, the edges of the hole are wrapped with an insulating coating.

[0011] Preferably, a copper foil shielding layer is integrated on the inner side of the hollow radial support bar.

[0012] Preferably, the central magnetic column is provided with baffles at both ends, and the baffles are provided with a number of third heat dissipation holes that can communicate with the gap formed between the winding and the hollow radial support bar.

[0013] Preferably, the retaining wall is provided with wire grooves on opposite sides.

[0014] Preferably, an insulating bushing is pre-installed on the inner sidewall of the wire trough.

[0015] According to the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows: the central magnetic column and the first heat dissipation holes on its periphery can effectively increase air circulation and promote heat dissipation; the hollow radial support bar is fixed to the periphery of the magnetic column by a snap-fit ​​or clamping structure, which disperses the radial stress generated by the short-circuit electrodynamic force and prevents the magnetic column from twisting and deforming due to high-frequency vibration or impact, thereby avoiding inter-turn short circuits caused by winding displacement; the hollow radial support bar is covered on the first heat dissipation hole, forming a double heat dissipation path with the second heat dissipation hole, and the mesh second heat dissipation holes set on opposite sides of the hollow radial support bar do not directly contact the winding. The straight distance between each second heat dissipation hole and the winding is greater than or equal to 3mm. Due to the existence of this gap, the hot air will not be directly discharged to the winding, but will be buffered in the gap and gradually dissipated from the gap of the winding wire, preventing the transformer from overheating during operation. At the same time, it can greatly avoid the local field strength being too high due to the reduction of the insulation layer, which accelerates insulation aging or breakdown and extends the service life of the frame. It can not only improve heat dissipation efficiency, but also reduce the possibility of inter-turn short circuits.

[0016] Other features and advantages of this utility model will be described in detail in the following detailed description section; and all parts not covered in this utility model are the same as or can be implemented using existing technology. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional electronic transformer frame provided in a preferred embodiment of the present invention. Figure 1 .

[0019] Figure 2 This is a three-dimensional electronic transformer frame provided in a preferred embodiment of the present invention. Figure 2 .

[0020] Figure 3 This is a planar sectional view of the electronic transformer frame provided in a preferred embodiment of the present invention.

[0021] Explanation of reference numerals in the attached diagram: 1-Central magnetic column; 101-Through hole; 102-First heat dissipation hole; 103-Hollow radial support bar; 104-Second heat dissipation hole; 2-Block wall; 201-Third heat dissipation hole; 202-Wire groove. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the utility model product is in use. These are merely for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. Additionally, the terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] Reference Figures 1-3 An electronic transformer frame includes a central magnetic column 1, which has a through hole 101 along its length and a plurality of first heat dissipation holes 102 on its periphery. Hollow radial support bars 103 are also vertically mounted on each of the first heat dissipation holes 102 on the periphery of the central magnetic column 1. A plurality of second heat dissipation holes 104 are respectively provided on opposite sides of the hollow radial support bars 103.

[0027] The central magnetic column 1 and the first heat dissipation holes 102 on its periphery can effectively increase air circulation, promote heat dissipation, and prevent the transformer from overheating during operation. At the same time, it can significantly avoid the local field strength being too high due to the reduction of the insulation layer, which would accelerate insulation aging or breakdown and extend the service life of the frame. The hollow radial support bar 103 is fixed to the periphery of the magnetic column by a snap-fit ​​or clamping structure, which disperses the radial stress generated by the short-circuit electrodynamic force and prevents the magnetic column from twisting and deforming due to high-frequency vibration or impact, thereby avoiding inter-turn short circuits caused by winding displacement. The hollow radial support bar 103 is covered on the first heat dissipation hole 102, forming a double heat dissipation path with the second heat dissipation hole 104. The mesh second heat dissipation holes 104 set on opposite sides of the hollow radial support bar 103 do not directly contact the winding. The straight distance between each second heat dissipation hole 104 and the winding is greater than or equal to 3mm, which can not only improve heat dissipation efficiency, but also reduce the possibility of inter-turn short circuits.

[0028] The edges of the first heat dissipation hole 102 and the second heat dissipation hole 104 are chamfered.

[0029] For example, in this application, the diameter of the first heat dissipation hole 102 and the second heat dissipation hole 104 is 2-3 mm. The chamfer R of the hole edge is greater than or equal to 0.5 mm by milling or laser cutting process to eliminate the tip effect.

[0030] The edges of the hole are wrapped with an insulating coating.

[0031] This application further blocks the electric field penetration path by wrapping the hole edge with polyimide tape or epoxy resin coating with a thickness of 0.2 mm or more.

[0032] The hollow radial support bar 103 has a copper foil shielding layer integrated on its inner side.

[0033] This application uses a design that can directly suppress high-frequency common-mode interference and reduce inter-turn capacitance coupling.

[0034] Reference Figure 2The central magnetic column 1 is provided with baffles 2 at its two opposite ends. The baffles 2 are provided with a number of third heat dissipation holes 201 that can communicate with the gap formed between the winding and the hollow radial support bar 103.

[0035] The retaining wall 2 of this application fixes the winding through an axial clamping structure such as a hydraulic device, disperses the short-circuit impact force, and reduces the risk of winding deformation or displacement; the third heat dissipation hole 201 can exhaust the internal heat air in the gap between the winding and the hollow radial support bar 103, further improving the heat dissipation effect.

[0036] Reference Figure 2 The retaining wall 2 is provided with wire grooves 202 on both opposite sides.

[0037] The cable tray 202 of this application provides a fixed routing channel for the windings, forcing the primary / secondary windings to be arranged along a preset path, avoiding crossing or misalignment, significantly reducing the probability of inter-turn short circuits, and also preventing insulation wear caused by vibration or displacement.

[0038] An insulating bushing is pre-installed on the inner side wall of the cable tray 202.

[0039] The bushing described in this application is made of polyimide material with a thickness of 0.1 to 0.3 mm to fix the winding conductors and prevent insulation damage.

[0040] In use, the device provided by this utility model effectively increases airflow and promotes heat dissipation through the central magnetic column 1 and the first heat dissipation holes 102 on its periphery. The hollow radial support bar 103 is fixed to the periphery of the magnetic column by a snap-fit ​​or clamping structure, dispersing the radial stress generated by the short-circuit electrodynamic force and preventing the magnetic column from twisting and deforming due to high-frequency vibration or impact, thereby avoiding inter-turn short circuits caused by winding displacement. The hollow radial support bar 103 is placed over the first heat dissipation hole 102, forming a dual heat dissipation path with the second heat dissipation hole 104, and is arranged in a manner that... The mesh-like second heat dissipation holes 104 on both sides do not directly contact the windings. The straight-line distance between each second heat dissipation hole 104 and the winding is greater than or equal to 3mm. Due to the existence of this gap, the hot air will not be directly discharged to the windings, but will be buffered in the gap and gradually dissipated from the winding gaps. This prevents the transformer from overheating during operation and can also greatly avoid the local field strength being too high due to the reduction of the insulation layer, which would accelerate insulation aging or breakdown and extend the service life of the frame. This not only improves heat dissipation efficiency, but also reduces the possibility of inter-turn short circuits.

[0041] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0043] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An electronic transformer bobbin, characterized by, The electronic transformer frame includes a central magnetic column (1), which has a through hole (101) along its length and a plurality of first heat dissipation holes (102) on its periphery. Hollow radial support bars (103) are also vertically mounted on each of the first heat dissipation holes (102) on the periphery of the central magnetic column (1), and a plurality of second heat dissipation holes (104) are respectively provided on the opposite sides of the hollow radial support bars (103).

2. An electronic transformer bobbin as claimed in claim 1, characterized in that The edges of the first heat dissipation hole (102) and the second heat dissipation hole (104) are chamfered.

3. An electronic transformer bobbin as defined in claim 1, wherein, The edges of the first heat dissipation hole (102) and the second heat dissipation hole (104) are wrapped with an insulating coating.

4. An electronic transformer bobbin as defined in claim 1, wherein, The hollow radial support bar (103) has a copper foil shielding layer integrated on its inner side.

5. An electronic transformer bobbin as defined in claim 1, wherein, The central magnetic column (1) is provided with baffles (2) at its two opposite ends. The baffles (2) are provided with a number of third heat dissipation holes (201) that can communicate with the gap formed between the winding and the hollow radial support bar (103).

6. An electronic transformer bobbin as claimed in claim 5, wherein, The retaining wall (2) has wire grooves (202) on both sides.

7. An electronic transformer bobbin as claimed in claim 6, characterized in that An insulating bushing is pre-installed on the inner wall of the wire groove (202).

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