Dry-type transformer with low noise

Abstract

The utility model discloses a dry-type transformer with low noise. The dry-type transformer with low noise comprises a silicon steel sheet group and a winding coil, the silicon steel sheet group comprises a plurality of silicon steel sheets, the edge of each silicon steel sheet extends outwards to form a plurality of limiting sheets, and the plurality of limiting sheets at the same position of the plurality of silicon steel sheets are stacked to form a limiting block; a clamping groove is formed between every two adjacent limiting blocks, the winding coils are wound in the corresponding clamping grooves, and the winding coils are evenly distributed in the corresponding clamping grooves. According to the transformer, the limiting pieces are arranged, the multiple limiting pieces are stacked to form the limiting blocks, and the winding coils are wound in the clamping grooves formed between every two adjacent limiting blocks, so that the silicon steel sheets can be tightly attached, gaps between the silicon steel sheets are reduced, the risk that noise is generated due to collision of the adjacent silicon steel sheets is lowered, and noise generated by the transformer is lowered.

Description

Technical Field

[0001] This utility model relates to the field of transformers, and more particularly to a dry-type transformer with low noise. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core. Dry-type transformers are one type of transformer and are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery equipment, and other places.

[0003] Currently, when transformers on the market are working, the magnetostriction of silicon steel sheets causes the iron core to vibrate, resulting in significant noise. Especially at night, the noise generated by the transformer operation is too loud, and the noise radiated into the environment seriously affects the rest of nearby residents. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a dry-type transformer with low noise. By setting limiting plates, multiple limiting plates are stacked to form a limiting block. The winding coil is wound in the slot formed between two adjacent limiting blocks, so that each silicon steel sheet can be tightly attached, reducing the gap between silicon steel sheets, reducing the risk of noise caused by collision between adjacent silicon steel sheets, and reducing the noise emitted by the transformer.

[0005] Accordingly, this utility model proposes a dry-type transformer with low noise, which includes: silicon steel sheet group and winding coil;

[0006] The silicon steel sheet assembly includes multiple silicon steel sheets, each of which extends outward from its edge to form multiple limiting pieces, and the multiple limiting pieces at the same position of the multiple silicon steel sheets are stacked to form a limiting block;

[0007] A slot is formed between two adjacent limiting blocks, and the winding coil is wound in the corresponding slot, with the winding coil evenly distributed in the corresponding slot.

[0008] Preferably, each of the card slots is provided with a resin layer uniformly coated at the root of the card slot.

[0009] Preferably, each of the silicon steel sheets has multiple first fixing holes at the same position, and multiple silicon steel sheets are stacked to form multiple fixed pipes by stacking the multiple first fixing holes.

[0010] Preferably, an insulating rod is inserted into the fixed pipe, and the surface of the insulating rod abuts against the inner wall of the fixed pipe.

[0011] Preferably, the insulating rod includes a rod body and fixing blocks located at both ends of the rod body, wherein the fixing blocks are detachably connected to the rod body.

[0012] Preferably, an insulating structure is provided between two adjacent silicon steel sheets.

[0013] Preferably, the winding coil includes: a high-voltage coil and a low-voltage coil;

[0014] The high-voltage coil is located around the low-voltage coil, and the low-voltage coil is wound in the corresponding slot.

[0015] Preferably, the low-voltage coil has a ligature structure.

[0016] Preferably, the winding direction of the high-voltage coil is opposite to that of the low-voltage coil.

[0017] Preferably, the low-noise dry-type transformer further includes a mounting base, on which the silicon steel sheet assembly is mounted, and on which vibration damping springs are provided.

[0018] The beneficial effects of this utility model are:

[0019] This invention features limiting plates on each silicon steel sheet, with multiple limiting plates stacked to form a limiting block. The winding coil is wound within a groove formed between two adjacent limiting blocks. The winding coil exerts a force on the multiple silicon steel sheets towards the center, ensuring that each silicon steel sheet fits tightly together. This prevents magnetostriction of the silicon steel sheets during transformer operation, thus avoiding collisions between adjacent silicon steel sheets that could generate noise. Furthermore, when magnetostriction occurs, adjacent silicon steel sheets immediately come together, reducing gaps between them and lowering the risk of noise from collisions, thereby reducing the noise emitted by the transformer. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the low-noise dry-type transformer in this utility model;

[0022] Figure 2 This is a cross-sectional view of the low-noise dry-type transformer of this utility model;

[0023] Figure 3This is a schematic diagram of the silicon steel sheet assembly in this utility model;

[0024] Figure 4 This is a schematic diagram of the silicon steel sheet in this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the insulating rod in this utility model;

[0026] Figure 6 This is a line graph comparing the average noise level of the transformer in this utility model.

[0027] In the attached diagram, 1. Silicon steel sheet assembly; 11. Silicon steel sheet; 12. Limiting plate; 13. Limiting block; 14. Slot; 15. First fixing hole; 16. Fixing pipe; 161. Insulating rod; 1611. Rod body; 1612. Fixing block; 2. Winding coil; 21. High voltage coil; 22. Low voltage coil; 3. Mounting base. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Figure 1 A schematic diagram of the structure of the low-noise dry-type transformer of this invention is shown. Figure 2 A cross-sectional view of the low-noise dry-type transformer of this invention is shown. Figure 3 This invention provides a schematic diagram of the silicon steel sheet assembly. Figure 4 A schematic diagram of the silicon steel sheet in this invention is shown. Figure 5 A schematic diagram of the insulating rod in this invention is shown. Figure 6A line graph comparing the average noise level of the transformer in this invention is shown. The low-noise dry-type transformer includes: a silicon steel sheet group 1 and a winding coil 2; the silicon steel sheet group 1 includes multiple silicon steel sheets 11, and the edge of each silicon steel sheet 11 extends outward to form multiple limiting pieces 12. Multiple limiting pieces 12 at the same position of multiple silicon steel sheets 11 are stacked to form a limiting block 13; a slot 14 is formed between two adjacent limiting blocks 13, and the winding coil 2 is wound in the corresponding slot 14, and the winding coil 2 is evenly distributed in the corresponding slot 14. In this embodiment, the winding coil 2 is wound in the corresponding slot 14. After the winding coil 2 is wound in the corresponding slot 14, the winding coil 2 exerts a force on the multiple silicon steel sheets 11 towards the center of the winding coil, so that each silicon steel sheet 11 can fit tightly together. This avoids the magnetostriction phenomenon of the silicon steel sheets 11 during the operation of the transformer, preventing adjacent silicon steel sheets 11 from colliding and generating noise. It is beneficial to ensure that when the silicon steel sheets 11 undergo magnetostriction, adjacent silicon steel sheets 11 immediately fit together, reducing the gaps between the silicon steel sheets 11, reducing the risk of noise generation from collisions between adjacent silicon steel sheets 11, and reducing the noise emitted by the transformer. As can be seen from the transformer noise comparison in Table 1 below, the average noise decibel of this invention is lower than that of existing transformers in the same time period, and its average noise decibel is below 40 dB for most of the time periods.

[0030]

[0031] Table 1. Transformer Noise Comparison Table

[0032] Furthermore, each of the card slots 14 is provided with a resin layer uniformly applied to the root of the card slot 14. In this embodiment, the thickness of the resin layer located at the edge of the card slot 14 is greater than that of the resin layer located at the non-edge position in the card slot 14. The resin layer is used to protect the card slot 14 and the winding coil 2, avoiding the risk of wear and breakage of the coil caused by repeated friction between the silicon steel sheet 11 and the coil during use.

[0033] Furthermore, each silicon steel sheet 11 is provided with a plurality of first fixing holes 15, and multiple silicon steel sheets 11 are stacked to form a plurality of fixing channels 16 by stacking the plurality of first fixing holes 15. In this embodiment, each silicon steel sheet 11 is provided with four first fixing holes 15, and one of the four first fixing holes 15 corresponds to one of the four vertices of each silicon steel sheet 11, that is, the silicon steel sheet group 1 has four fixing channels 16. Material is inserted into the fixing channels 16, which can enhance the structural stability of the stacked silicon steel sheets 11, avoid the silicon steel sheets 11 from loosening or deforming due to vibration or external force during operation, reduce the risk of noise caused by collision between the silicon steel sheets 11, and thus reduce the risk of noise from the transformer.

[0034] Furthermore, an insulating plate 161 is inserted into the fixed pipe 16, and the surface of the insulating plate 161 abuts against the inner wall of the fixed pipe 16. In this embodiment, when the surface of the insulating plate 161 abuts against the inner wall of the fixed pipe 16, magnetostriction occurs when multiple silicon steel sheets 11 are subjected to current flow. The insulating plate 161 exerts a force on the silicon steel sheets 11, fixing the silicon steel sheets 11 with the insulating plate 161 as a reference, reducing the amplitude of the expansion and contraction of the silicon steel sheets 11, thereby reducing the risk of the silicon steel sheets 11 becoming loose or deformed due to vibration or external force after magnetostriction and colliding with each other, generating noise. Secondly, during installation, the insulating plate 161 can serve as a positioning element, helping to accurately place and fix the silicon steel sheets 11, and speeding up the assembly efficiency.

[0035] Furthermore, the insulating plate 161 includes a rod body 1611 and fixing blocks 1612 located at both ends of the rod body. The fixing blocks 1611 can be divided into a first fixing block and a second fixing block. The fixing blocks 1612 are detachably connected to the rod body 1611. The radius of the fixing blocks 1612 is larger than the radius of the rod body 1611, restricting the contact between the fixing blocks 1611 and the corresponding silicon steel sheets 11 when the insulating plate 161 is inserted into the corresponding fixed pipe 16. In this embodiment, the first fixing block and the second fixing block exert a force on the silicon steel sheets 11 from both sides simultaneously, ensuring that each silicon steel sheet 11 in the silicon steel sheet group 1 is tightly fitted together. This reduces the risk of loosening or deformation of the silicon steel sheets 11 due to vibration or external forces during operation, thereby reducing the risk of noise caused by collisions between the silicon steel sheets 11.

[0036] Furthermore, an insulating structure is provided between two adjacent silicon steel sheets 11. The insulating structure has a high resistivity and a relatively low current density. When the insulating structure is located between every two silicon steel sheets 11, it forces the current to flow around the surface of the silicon steel sheets 11, thereby reducing current loss and lowering the loss of the silicon steel sheet assembly 1. Secondly, the insulating structure located between every two silicon steel sheets 11 makes the magnetic flux path between the silicon steel sheets 11 clearer, reduces magnetic flux leakage and crossing, thereby improving the permeability of the silicon steel sheet assembly 1.

[0037] Furthermore, the winding coil 2 includes a high-voltage coil 21 and a low-voltage coil 22; the high-voltage coil 21 is located around the low-voltage coil 22, and the low-voltage coil 22 is wound within the corresponding slot 14. In this embodiment, during use, the current flowing through the high-voltage coil 21 generates a large amount of heat, while the heat generated by the current flowing through the low-voltage coil 22 is less than that generated by the high-voltage coil 21. The high-voltage coil 21 is located around the low-voltage coil 22, increasing the contact area between the high-voltage coil 21 and the external environment, accelerating the heat transfer of the high-voltage coil 21 to the external environment, and thus accelerating the heat dissipation efficiency of the transformer. Secondly, the high-voltage coil 21 is arranged around the low-voltage coil 22, making the insulation distance between the high-voltage winding and the silicon steel sheet group 1 relatively large, thereby making it easier to achieve higher insulation performance. This helps to reduce the requirements for the insulation material between the high-voltage coil 21 and the silicon steel sheet group 1, and also helps to reduce the size of the transformer and lower the cost.

[0038] Furthermore, the low-voltage coil 22 has a ligature structure, which physically connects all parts of the low-voltage coil 22 tightly together to form a whole. This structure can effectively prevent the coil from loosening or deforming under vibration or external force, thereby enhancing the structural stability of the coil. The ligature structure can improve the heat dissipation efficiency of the coil by optimizing the coil layout and heat dissipation channels, which helps to reduce the operating temperature of the coil and extend the service life of the equipment. The ligature structure also makes the low-voltage coil 22 more convenient to install and maintain. The various parts of the coil are connected by ligatures, which can be easily disassembled and replaced, reducing the difficulty and cost of installation and maintenance and improving the maintainability of the equipment.

[0039] Furthermore, the winding direction of the high-voltage coil 21 is opposite to that of the low-voltage coil 22. In this embodiment, when current flows through the high-voltage winding, a magnetic field is generated around the winding. The change in the magnetic field propagates through the iron core to the low-voltage winding, generating an electromotive force in the low-voltage winding. The currents flowing in the high-voltage and low-voltage windings then reinforce each other, thereby achieving energy transmission and conversion. This prevents the currents in the high-voltage and low-voltage coils 22 from canceling each other out, which would reduce the energy transmission and conversion efficiency of the transformer, thus improving the energy transmission and conversion efficiency of the transformer.

[0040] Furthermore, the low-noise dry-type transformer also includes a mounting base 3, on which the silicon steel sheet assembly 1 is mounted. A vibration damping spring 31 is provided on the mounting base 3. The mounting base 3 is used to fix the silicon steel sheet assembly 1, preventing it from vibrating during operation and potentially falling off the transformer due to repeated vibrations. The vibration damping spring 31, with one end connected to the mounting base and the other end connected to the ground, absorbs the vibration generated by the mounting base 11 when the silicon steel sheet vibrates. This effectively absorbs some of the vibration generated by the silicon steel sheet during operation, thus reducing the noise caused by the vibration of the silicon steel sheet 11.

[0041] In summary, this utility model provides limiting plates on each silicon steel sheet, with multiple limiting plates stacked to form a limiting block. The winding coil is wound in the slot formed between two adjacent limiting blocks. The winding coil exerts a force towards the center on the multiple silicon steel sheets, ensuring that each silicon steel sheet fits tightly together. This prevents magnetostriction of the silicon steel sheets during transformer operation, avoiding collisions between adjacent silicon steel sheets that could generate noise. Furthermore, when magnetostriction occurs, adjacent silicon steel sheets immediately fit together, reducing gaps between the sheets and lowering the risk of noise from collisions, thus reducing the noise emitted by the transformer.

[0042] The above provides a detailed description of a low-noise dry-type transformer according to the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A dry-type transformer having low noise, characterized by, The dry-type transformer comprises a silicon steel sheet set and a winding coil; The silicon steel sheet set comprises a plurality of silicon steel sheets, and edges of each silicon steel sheet extend outward to form a plurality of limiting pieces, and the limiting pieces at the same position of the plurality of silicon steel sheets are stacked to form a limiting block; Adjacent two limiting blocks form a clamping groove, the winding coil is wound in the corresponding clamping groove, and the winding coil is uniformly distributed in the corresponding clamping groove.

2. Dry transformer with low noise according to claim 1, characterized in that A resin layer uniformly coated at the root of each clamping groove is arranged in each clamping groove.

3. Dry-type transformer with low noise according to claim 1, characterized in that, Each silicon steel sheet is provided with a plurality of first fixing holes at the same position, and the plurality of silicon steel sheets are stacked to stack the plurality of first fixing holes to form a plurality of fixing channels.

4. Dry transformer with low noise according to claim 3, characterized in that An insulating rod is inserted into the fixing channel, and the surface of the insulating rod and the inner wall of the fixing channel are in abutment.

5. Dry transformer with low noise according to claim 4, characterized in that, The insulating rod comprises a rod body and a fixing block at both ends of the rod body, and the fixing block is detachably connected with the rod body.

6. The dry-type transformer with low noise according to claim 1, characterized in that, Adjacent two silicon steel sheets are provided with an insulating structure.

7. The dry-type transformer with low noise according to claim 1, characterized in that, The winding coil comprises a high-voltage coil and a low-voltage coil; The high-voltage coil is located at the periphery of the low-voltage coil, and the low-voltage coil is wound in the corresponding clamping groove.

8. Dry transformer with low noise according to claim 7, characterized in that The low-voltage coil is a ligation structure.

9. Dry transformer with low noise according to claim 7, characterized in that, The winding direction of the high-voltage coil is opposite to the winding direction of the low-voltage coil.

10. The dry-type transformer with low noise according to claim 1, characterized in that, The dry-type transformer with low noise further comprises a mounting base, the silicon steel sheet set is mounted on the mounting base, and the mounting base is provided with a damping spring.

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