Transformer structure

Abstract

This utility model discloses a transformer structure, relating to the field of transformer testing technology. The transformer structure includes a core, a clamping mechanism, and three low-voltage coils. The core includes an upper yoke, a lower yoke, and three core posts. Both the upper and lower yokes extend laterally, with the upper yoke abutting the top of each core post and the lower yoke abutting the bottom of each core post. The three core posts can be inserted into or withdrawn from their respective low-voltage coils. Each core post has an isolation component on its outer periphery to separate it from the corresponding low-voltage coil. The clamping mechanism includes two clamping components located at the top and bottom of each low-voltage coil, respectively, to clamp or release each low-voltage coil to or from its corresponding core post. This transformer structure allows for convenient core noise testing of different cores under the same low-voltage coil conditions, offering greater flexibility.

Description

Technical Field

[0001] This utility model relates to the field of transformer testing technology, and in particular to a transformer structure. Background Technology

[0002] In the design and manufacturing process of transformers, core noise is a crucial performance indicator that directly affects the operational stability and user experience of the transformer product. Existing measurement methods mostly use complete transformer structures for testing, which is costly. Furthermore, because these transformers include high-voltage and low-voltage coils and insulation systems, core noise testing is limited, making it difficult to isolate noise interference from other components. In addition, complete transformer structures are not convenient for core replacement, making it impossible to conduct core noise tests and comparisons of different cores under the same coil conditions, resulting in poor flexibility. Utility Model Content

[0003] The main purpose of this invention is to propose a transformer structure that aims to solve the technical problem of poor flexibility in testing transformer core noise in existing transformers.

[0004] To achieve the above objectives, this utility model proposes a transformer structure, comprising: The iron core includes an upper yoke, a lower yoke, and three core pillars. The upper yoke and the lower yoke extend laterally, and the three core pillars extend vertically and are spaced apart laterally. The upper yoke is connected to the top of each core pillar, and the lower yoke is connected to the bottom of each core pillar. The three low-voltage coils and the three core columns can be inserted into or extracted from the corresponding low-voltage coils in a one-to-one correspondence; and each core column is provided with an isolation component on its outer periphery to isolate it from the corresponding low-voltage coil. The clamping mechanism includes two clamping components, which are located at the top and bottom of each of the low-voltage coils, respectively, to clamp each of the low-voltage coils to the outside of the corresponding iron core column or to loosen them from the outside of the corresponding iron core column.

[0005] In one embodiment, each of the isolation components includes a plurality of vertically extending insulating strips, the plurality of insulating strips being distributed circumferentially at intervals along the corresponding iron core column, and each insulating strip abutting against the inner side of the corresponding low-voltage coil on the outer side away from the iron core column.

[0006] In one embodiment, the outer side of each insulating strip away from the corresponding iron core column is an arc-shaped outer side, and each arc-shaped outer side abuts against the inner side of the corresponding low-voltage coil.

[0007] In one embodiment, the vertical height of each insulating strip is equal to the vertical height of the corresponding low-voltage coil, and the two clamping components cooperate to clamp or release each low-voltage coil.

[0008] In one embodiment, each of the core columns includes a sleeve section and two mating sections, wherein one of the mating sections is connected to the top of the sleeve section and the other mating section is connected to the bottom of the sleeve section; each of the low-voltage coils is sleeved outside the sleeve section of the corresponding core column, the upper yoke is mated to the mating section located at the top of the sleeve section, and the lower yoke is mated to the mating section located at the bottom of the sleeve section; Each of the clamping assemblies forms a laterally extending opening, the upper yoke and the mating section located at the top of the socket section extending into and clamping the opening located at the top of the low-voltage coil, and the lower yoke and the mating section located at the bottom of the socket section extending into and clamping the opening located at the bottom of the low-voltage coil.

[0009] In one embodiment, the outer periphery of the socket segment has four corners, the number of insulating strips is the same as the number of corners and they are arranged in a one-to-one correspondence, and the inner side of each insulating strip is provided with a slot for the corner to extend into and engage, and each corner can extend into and engage in the slot.

[0010] In one embodiment, the socket segment is a cylindrical socket segment, and the inner side of each insulating strip is an arc-shaped inner side that matches the outer contour of the socket segment.

[0011] In one embodiment, each of the clamping components includes two clamping plates extending laterally, and the two clamping plates are respectively located on opposite sides of each of the core columns along the longitudinal direction, forming the opening between the two clamping plates, and the two clamping plates are fastened or loosened by a first connector to clamp the corresponding mating section within the opening; In the two clamping assemblies, the two clamping plates located on the same side in the longitudinal direction are also fastened or loosened by a second connector to cooperate in clamping or loosening each of the low-voltage coils.

[0012] In one embodiment, each of the clamping plates is a channel steel with a slot, and the slots of two of the channel steels in the same clamping assembly are arranged opposite to each other.

[0013] In one embodiment, each of the low-voltage coils is a foil-wound structure or a wire-wound structure.

[0014] The transformer structure of this utility model allows the three core columns of the iron core to extend into the three low-voltage coils respectively. Each low-voltage coil is clamped to the outside of its corresponding core column by two clamping components, ensuring the stability of the low-voltage coil outside the core column and preventing the low-voltage coil from shaking and affecting the test results during the core noise test. Furthermore, by providing isolation components on the outer periphery of each core column, the core column and the corresponding low-voltage coil are isolated, preventing direct contact between them. This facilitates the quick removal of the core column from the corresponding low-voltage coil when the two clamping components are released, enabling rapid replacement of the entire iron core, such as replacing it with a core made of different materials or with a core of different silicon steel sheet structures. This allows for core noise testing of different cores under the same low-voltage coil conditions, enabling comparative testing of core noise from different cores, providing greater flexibility. Moreover, the isolation components prevent wear caused by friction between the core column and the low-voltage coil when the core column is inserted into or removed from the low-voltage coil, resulting in better reliability. Attached Figure Description

[0015] 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 the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a front view of the transformer structure and oil tank provided in an embodiment of the present utility model; Figure 2 This is a top view schematic diagram of a transformer structure provided in an embodiment of the present invention.

[0017] Explanation of icon numbers: 100. Transformer structure; 1. Core; 11. Upper yoke; 12. Lower yoke; 13. Core column; 131. Connecting section; 132. Butt joint section; 14. Isolation assembly; 141. Insulating strip; 2. Low-voltage coil; 3. Clamping mechanism; 31. Clamping assembly; 200. Fuel tank.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes a transformer structure 100.

[0023] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the transformer structure 100 includes an iron core 1, a clamping mechanism 3, and three low-voltage coils 2. The iron core 1 includes an upper yoke 11, a lower yoke 12, and three iron core columns 13. The upper yoke 11 and the lower yoke 12 extend laterally, and the three iron core columns 13 extend vertically and are spaced apart laterally. The upper yoke 11 is connected to the top of each iron core column 13, and the lower yoke 12 is connected to the bottom of each iron core column 13. The three iron core columns 13 can be inserted into or extracted from the corresponding low-voltage coils 2 in a corresponding manner. An isolation component 14 is provided on the outer periphery of each iron core column 13 to isolate it from the corresponding low-voltage coil 2. The clamping mechanism 3 includes two clamping components 31, which are located at the top and bottom of each low-voltage coil 2, respectively, to clamp or release each low-voltage coil 2 to the corresponding iron core column 13.

[0024] The transformer structure 100 of this utility model allows the three core columns 13 of the core 1 to extend into the three low-voltage coils 2 respectively. Each low-voltage coil 2 is clamped to the outside of its corresponding core column 13 by two clamping components 31, ensuring the stability of the low-voltage coil 2 outside the core column 13 and preventing the low-voltage coil 2 from shaking and affecting the test results during core noise testing. Furthermore, by providing an isolation component 14 on the outer periphery of each core column 13, the isolation component 14 isolates the core column 13 from the corresponding low-voltage coil 2, preventing direct contact between the core column 13 and the low-voltage coil 2, thus facilitating... When the two clamping components 31 release the low-voltage coil 2, the core column 13 is quickly pulled out from the corresponding low-voltage coil 2, which facilitates the rapid replacement of the entire core 1, such as replacing the core 1 with a core 1 made of different materials or a core 1 with a different silicon steel sheet structure. This allows for core noise testing of different cores 1 under the same low-voltage coil 2 conditions, enabling comparative testing of core noise of different cores 1, which is more flexible. In addition, the isolation component 14 can prevent the core column 13 from scratching and wearing against the low-voltage coil 2 when it is inserted into or pulled out of the low-voltage coil 2, which is more reliable.

[0025] Understandably, during the assembly of the transformer structure 100, isolation components 14 are first installed on the outside of each of the three core columns 13. Then, each core column 13 and the corresponding isolation component 14 are inserted into the low-voltage coil 2. Next, the upper yoke 11 is connected to the top of the three core columns 13, and the lower yoke 12 is connected to the bottom of the three core columns 13. Then, the low-voltage coil 2 is clamped by the cooperation of two clamping components 31 to complete the assembly process. When replacing the core, the two clamping components 31 are first loosened so that the low-voltage coil 2 can be separated from the corresponding core column 13.

[0026] It should be noted that when the transformer structure 100 is used to simulate an oil-immersed transformer for core noise testing, the transformer structure 100 is placed inside an oil tank 200. The oil in the oil tank 200 completely covers the transformer structure 100 to simulate the environment of the transformer structure 100 during actual operation and to ensure the accuracy of the noise test.

[0027] In one embodiment, each isolation component 14 includes a plurality of vertically extending insulating strips 141, which are distributed circumferentially along the corresponding core column 13, and each insulating strip 141 abuts against the inner side of the corresponding low-voltage coil 2 on the outer side away from the core column 13.

[0028] Understandably, the isolation component 14 consists of multiple insulating strips 141. The insulating strips 141 are made of insulating materials, such as shaped wooden rods, or other non-metallic materials with insulation, rigidity, and certain mechanical strength, such as epoxy boards, plastic strips, ceramic pads, etc. The insulating strips 141 are vertically arranged between the iron core column 13 and the low-voltage coil 2, effectively preventing grounding short circuits or discharges caused by induced voltage or accidental contact of the iron core 1, ensuring electrical safety during the test process, and avoiding the impact of electric field interference on the accuracy of noise measurement.

[0029] In one embodiment, the outer side of each insulating strip 141 facing away from the corresponding core post 13 is an arc-shaped outer side, and each arc-shaped outer side abuts against the inner side of the corresponding low-voltage coil 2. Understandably, by setting the outer side of the insulating strip 141 to an arc-shaped structure that matches the inner side of the low-voltage coil 2, it forms a surface contact with the inner surface of the coil, significantly increasing the contact area. This helps prevent the insulating strip 141 from causing wear on the low-voltage coil 2, improves the service life of the low-voltage coil 2, and ensures that the low-voltage coil 2 can be reused multiple times.

[0030] Furthermore, the vertical height of each insulating strip 141 is equal to the vertical height of the corresponding low-voltage coil 2, and the two clamping components 31 cooperate to clamp or release each low-voltage coil 2. Understandably, the insulating strip 141 and the low-voltage coil 2 have the same vertical height, and the insulating strip 141 provides continuous and complete support and isolation along the axial direction of the coil. This avoids the problem of the low-voltage coil 2 being suspended or insufficiently supported due to the insulating strip 141 being too short, ensuring the coil remains stable relative to the core column 13 and significantly improving overall stability.

[0031] In one embodiment, each core post 13 includes a sleeve section 131 and two mating sections 132, with one mating section 132 connected to the top of the sleeve section 131 and the other mating section 132 connected to the bottom of the sleeve section 131; each low-voltage coil 2 is sleeved outside the sleeve section 131 of the corresponding core post 13, with the upper yoke 11 mating with the mating section 132 located at the top of the sleeve section 131 and the lower yoke 12 mating with the mating section 132 located at the bottom of the sleeve section 131; each clamping assembly 31 forms an opening extending laterally, with the upper yoke 11 and the mating section 132 located at the top of the sleeve section 131 extending into and clamping the opening located at the top of the low-voltage coil 2, and the lower yoke 12 and the mating section 132 located at the bottom of the sleeve section 131 extending into and clamping the opening located at the bottom of the low-voltage coil 2.

[0032] Understandably, the core column 13 includes two mating sections 132 and a sleeve section 131. The low-voltage coil 2 is only sleeved on the middle sleeve section 131, while the upper and lower yokes 12 are connected to the top and bottom mating sections 132 respectively. The clamping assembly 31 forms an opening extending laterally. By inserting the upper yoke 11 and the sleeve section 131 located at the top of the sleeve end into and clamping it in the opening located at the top of the low-voltage coil 2, and by inserting the lower yoke 12 and the mating section 132 located at the bottom of the sleeve section 131 into and clamping it in the opening located at the bottom of the low-voltage coil 2, the core 1 is secured by the cooperation of the two clamping assemblies 31, making the assembly and disassembly of the core 1 more convenient and facilitating the quick replacement of the core 1.

[0033] In one embodiment, the outer periphery of the socket section 131 has four corners, and the number of insulating strips 141 is the same as the number of corners and they are arranged in a one-to-one correspondence. Each insulating strip 141 has a slot on its inner side for the corner to extend into and engage. Each corner can extend into and engage in the slot.

[0034] Understandably, the sleeve section 131 of the core column 13 has four corners, and the insulating strip 141 is also provided with four corners. The four corners and the four insulating strips 141 with slots are connected one by one, so that the insulating strips 141 can be quickly installed on the outside of the sleeve section 131, thereby improving the assembly efficiency of the core column 13 and the low-voltage coil 2. In addition, the four insulating strips 141 can effectively prevent direct contact between the core column 13 and the low-voltage coil 2.

[0035] In another embodiment, the socket section 131 is a cylindrical socket section 131, and the inner side of each insulating strip 141 is an arc-shaped inner side that matches the outer contour of the socket section 131. Understandably, when the socket section 131 of the core column 13 is cylindrical, the inner side of the insulating strip 141 is also set as an arc-shaped inner side to increase the contact area with the socket section 131, facilitating assembly and preventing scratches on the core column 13, thus improving reliability.

[0036] In one embodiment, each clamping assembly 31 includes two clamping plates extending laterally, and the two clamping plates are respectively located on opposite sides of each core column 13 along the longitudinal direction, forming an opening between the two clamping plates. The two clamping plates are fastened or loosened by a first connector to clamp the corresponding mating section 132 within the opening. In the two clamping assemblies 31, in the longitudinal direction, the two clamping plates located on the same side are also fastened or loosened by a second connector to cooperate in clamping or loosening each low-voltage coil 2.

[0037] Understandably, each clamping assembly 31 includes two clamping plates, which are located on opposite sides of the core column 13 along the longitudinal direction. The two clamping plates are fastened by the first connector, thereby clamping them onto the core column 13 and ensuring a more stable connection between the upper yoke 11 or the lower yoke 12 and the corresponding mating section 132. In addition, the two clamping plates located on the same side are also fastened or loosened by the second connector, thereby clamping the low-voltage coil 2 and ensuring its stability relative to the core column 13. It can be seen that by adjusting the first connector and the second connector to loosen each clamping plate, it is convenient to pull out the core column 13.

[0038] It should be noted that both the first and second connecting parts can be screws from the prior art.

[0039] In one embodiment, each clamping plate is a channel steel with slots, and the slots of two channel steels in the same clamping assembly 31 are arranged opposite to each other. It can be understood that using channel steel as clamping plates is advantageous because channel steel itself has high bending strength and structural stability. Using it as clamping plates can withstand the mechanical vibration of the iron core 1 and the low-voltage coil 2 during operation, ensuring more reliable clamping of the low-voltage coil 2.

[0040] In one embodiment, each low-voltage coil 2 is a foil-wound structure or a wire-wound structure. By setting different types of low-voltage coils 2, the core noise performance of different iron cores 1 under different low-voltage coils 2 can be tested. The appropriate low-voltage coil 2 can be selected to test the core noise of the iron core 1 according to actual needs, which provides better flexibility.

[0041] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made under the technical concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A transformer structure, characterized by include: The iron core includes an upper yoke, a lower yoke, and three core pillars. The upper yoke and the lower yoke extend laterally, and the three core pillars extend vertically and are spaced apart laterally. The upper yoke is connected to the top of each core pillar, and the lower yoke is connected to the bottom of each core pillar. The three low-voltage coils and the three core columns can be inserted into or extracted from the corresponding low-voltage coils in a one-to-one correspondence; and each core column is provided with an isolation component on its outer periphery to isolate it from the corresponding low-voltage coil. The clamping mechanism includes two clamping components, which are located at the top and bottom of each of the low-voltage coils, respectively, to clamp each of the low-voltage coils to the outside of the corresponding iron core column or to loosen them from the outside of the corresponding iron core column.

2. The transformer structure as described in claim 1, characterized in that, Each of the isolation components includes a plurality of vertically extending insulating strips, which are spaced apart circumferentially along the corresponding iron core column, and the outer side of each insulating strip away from the iron core column abuts against the inner side of the corresponding low-voltage coil.

3. The transformer structure of claim 2, wherein, Each insulating strip has an arc-shaped outer side that is away from the outer side of the corresponding iron core column, and each arc-shaped outer side abuts against the inner side of the corresponding low-voltage coil.

4. The transformer structure of claim 2, wherein, The vertical height of each insulating strip is equal to the vertical height of the corresponding low-voltage coil, and the two clamping components cooperate to clamp or release each low-voltage coil.

5. The transformer structure as described in claim 2, characterized in that, Each of the core columns includes a sleeve section and two mating sections, wherein one of the mating sections is connected to the top of the sleeve section and the other mating section is connected to the bottom of the sleeve section; each of the low-voltage coils is sleeved outside the sleeve section of the corresponding core column, the upper yoke is mated to the mating section located at the top of the sleeve section, and the lower yoke is mated to the mating section located at the bottom of the sleeve section; Each of the clamping assemblies forms a laterally extending opening, the upper yoke and the mating section located at the top of the socket section extending into and clamping the opening located at the top of the low-voltage coil, and the lower yoke and the mating section located at the bottom of the socket section extending into and clamping the opening located at the bottom of the low-voltage coil.

6. The transformer structure of claim 5, wherein, The outer periphery of the socket section has four corners. The number of insulating strips is the same as the number of corners and they are arranged in a one-to-one correspondence. Each insulating strip has a slot on its inner side for the corner to extend into and engage. Each corner can extend into and engage in the slot.

7. The transformer structure of claim 5, wherein The socket segment is a cylindrical socket segment, and the inner side of each insulating strip is an arc-shaped inner side that matches the outer contour of the socket segment.

8. The transformer structure as described in claim 5, characterized in that, Each of the clamping assemblies includes two clamping plates extending laterally, and the two clamping plates are respectively located on opposite sides of each of the core columns along the longitudinal direction. The opening is formed between the two clamping plates, and the two clamping plates are fastened or loosened by a first connector to clamp the corresponding mating section in the opening. In the two clamping assemblies, the two clamping plates located on the same side in the longitudinal direction are also fastened or loosened by a second connector to cooperate in clamping or loosening each of the low-voltage coils.

9. A transformer structure as claimed in claim 8, characterised in that Each of the clamping plates is a channel steel with a groove, and the grooves of the two channel steels in the same clamping assembly are arranged opposite to each other.

10. The transformer structure of any one of claims 1 to 7, wherein, Each of the low-voltage coils is either a foil-wound structure or a wire-wound structure.

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