High-strength amorphous alloy three-dimensional wound core transformer

Abstract

The invention provides a high-strength amorphous alloy three-dimensional wound core transformer which comprises three groups of iron core columns with equilateral triangle closed structures, and the three groups of iron core columns are sequentially spliced and connected to form a symmetrical three-phase magnetic circuit; the iron core column is prepared by winding an amorphous alloy strip; the surface of the amorphous alloy strip is coated with a reinforcing layer; the three groups of equilateral triangle closed structure iron core columns are spliced to form a symmetrical three-phase magnetic circuit, and the problems that the amorphous alloy transformer is low in mechanical strength, asymmetric in magnetic circuit and low in space utilization rate are jointly solved in combination with the amorphous alloy strip wound iron core columns and the reinforcing layers coated on the surfaces of the amorphous alloy strip wound iron core columns.

Description

Technical Field

[0001] This invention belongs to the field of power transformer technology, specifically relating to a high-strength amorphous alloy three-dimensional wound core transformer. Background Technology

[0002] Amorphous alloys, due to their disordered atomic arrangement and extremely low hysteresis and eddy current losses, are widely used in the manufacture of high-efficiency and energy-saving distribution transformer cores. Traditional amorphous alloy transformers mostly employ a planar wound core structure, which has the following drawbacks: Low mechanical strength: Amorphous alloy strips are brittle and prone to cracking due to vibration or impact during transportation, installation and operation, resulting in increased no-load losses. Magnetic circuit asymmetry: The three-phase magnetic circuits in the planar structure have unequal lengths, resulting in an imbalance of the three-phase excitation current; Low space utilization: The low fill factor of the laminated or planar winding structure results in a large transformer size.

[0003] Although some studies have proposed that three-dimensional wound core structures (such as triangular closed cores) can improve magnetic circuit symmetry, amorphous alloy strips in existing technologies are prone to breakage due to bending stress concentration during three-dimensional winding, and there is a lack of effective mechanical reinforcement schemes, which limits their engineering applications. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength amorphous alloy three-dimensional wound core transformer, which solves the problems of insufficient mechanical strength, magnetic circuit asymmetry and low space utilization of amorphous alloy cores, while maintaining ultra-low no-load loss characteristics.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a high-strength amorphous alloy three-dimensional wound core transformer, comprising three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit. The iron core column is prepared by winding amorphous alloy strip; The surface of the amorphous alloy strip is coated with a reinforcing layer.

[0006] Preferably, the thickness of the reinforcing layer is 5–10 μm.

[0007] Preferably, the reinforcing layer is a nanocrystalline reinforced epoxy resin coating.

[0008] Preferably, the outer surface of the core column is wrapped with a carbon fiber prepreg tape protective layer.

[0009] Preferably, the method for preparing the protective layer of carbon fiber prepreg tape includes: The carbon fiber prepreg tape is wound around the surface of the iron core column with a tension of 80–120N to form a carbon fiber prepreg tape layer; The carbon fiber prepreg tape layer is cured at a temperature of 120–150℃ to obtain the carbon fiber prepreg tape protective layer.

[0010] Preferably, both ends of the three-phase iron core column are fixedly connected by clamps.

[0011] Preferably, a silicone rubber buffer pad is provided between the core column and the clamp.

[0012] Preferably, the clamp is an aluminum alloy clamp.

[0013] Preferably, each core post is wound with a winding.

[0014] Preferably, the thickness of the amorphous alloy strip is 0.020–0.025 mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a high-strength amorphous alloy three-dimensional wound core transformer. By employing three sets of equilateral triangular closed-structure core columns to form a symmetrical three-phase magnetic circuit, combined with amorphous alloy strip wound around the core columns and a surface-coated reinforcing layer, the problems of low mechanical strength, magnetic circuit asymmetry, and low space utilization in amorphous alloy transformers are jointly solved. Specifically, the equilateral triangular structure ensures magnetic circuit symmetry and reduces the imbalance of three-phase no-load current; the amorphous alloy strip maintains low-loss characteristics; and the surface reinforcing layer significantly improves the mechanical strength and impact resistance of the amorphous alloy material, preventing brittle fracture during winding, transportation, and operation. Thus, while maintaining high efficiency and energy saving, it enhances the overall structural reliability and durability, achieving a high-strength, low-loss, and compact transformer design.

[0016] Furthermore, the cladding layer formed by carbon fiber prepreg tape increases the core's impact resistance by more than 3 times, meeting the vibration test requirements of GB / T 1094.12. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of the core column in an embodiment of the present invention. Detailed Implementation

[0018] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0019] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0020] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0022] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0024] Example 1 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0025] Example 2 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0026] The iron core column is prepared by winding amorphous alloy strip.

[0027] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0028] Example 2 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0029] The iron core column is prepared by winding amorphous alloy strip.

[0030] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0031] The thickness of the nanocrystalline reinforced epoxy resin coating is 5–10 μm.

[0032] Example 3 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0033] The iron core column is prepared by winding amorphous alloy strip.

[0034] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0035] The outer surface of the iron core column is wrapped with a carbon fiber prepreg tape protective layer.

[0036] In this embodiment, when winding the iron core column, the winding tension of the carbon fiber prepreg tape is controlled at 80–120N, and the curing temperature is 120–150℃, forming a composite coating layer with a compressive strength ≥300MPa.

[0037] Example 4 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0038] The iron core column is prepared by winding amorphous alloy strip.

[0039] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0040] The two ends of the three sets of iron core columns are fixedly connected by aluminum alloy clamps.

[0041] In this embodiment, the inner wall of each aluminum alloy clip is provided with a positioning groove that matches the end face of the iron core column. A silicone rubber buffer pad is provided on the positioning groove. The positioning groove enables the aluminum alloy clip to fully contact and support the end face of the iron core column, avoiding point contact or line contact. The silicone rubber buffer pad can absorb vibration energy and disperse stress.

[0042] In this embodiment, the hardness of the silicone rubber cushioning pad is Shore A 60–70.

[0043] In this embodiment, the aluminum alloy clamp is a high elastic modulus aluminum alloy clamp, used to accommodate the thermal expansion and contraction of the iron core column.

[0044] Example 5 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0045] The iron core column is prepared by winding amorphous alloy strip.

[0046] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0047] The iron core column is equipped with windings.

[0048] Example 6 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0049] The iron core column is prepared by winding amorphous alloy strip.

[0050] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0051] The core transformer body is placed in a fully sealed corrugated oil tank, which is filled with highly thermally conductive insulating oil to suppress vibration transmission.

[0052] Example 7 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0053] The iron core column is prepared by winding amorphous alloy strip.

[0054] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0055] The amorphous alloy strip has a thickness of 0.020–0.025 mm and its composition, by atomic percentage, is as follows: .

[0056] Example 8 This embodiment provides a high-strength amorphous alloy three-dimensional wound core transformer, including a core transformer body. The core transformer body includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit.

[0057] The iron core column is prepared by winding amorphous alloy strip.

[0058] The outer surface of the amorphous alloy strip is coated with a nanocrystalline reinforced epoxy resin coating.

[0059] The cross-section of the iron core column is an approximately circular stepped shape, with ≥7 stepped sections and a filling coefficient ≥0.89.

[0060] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A high-strength amorphous alloy three-dimensional wound core transformer, characterized in that, It includes three sets of equilateral triangular closed core columns, which are sequentially spliced ​​and connected to form a symmetrical three-phase magnetic circuit; The iron core column is prepared by winding amorphous alloy strip; The surface of the amorphous alloy strip is coated with a reinforcing layer.

2. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 1, characterized in that, The thickness of the reinforcing layer is 5–10 μm.

3. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 1, characterized in that, The reinforcing layer is a nanocrystalline reinforced epoxy resin coating.

4. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 1, characterized in that, The outer surface of the iron core column is wrapped with a carbon fiber prepreg tape protective layer.

5. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 4, characterized in that, The method for preparing the protective layer of carbon fiber prepreg tape includes: The carbon fiber prepreg tape is wound around the surface of the iron core column with a tension of 80–120N to form a carbon fiber prepreg tape layer; The carbon fiber prepreg tape layer is cured at a temperature of 120–150℃ to obtain the carbon fiber prepreg tape protective layer.

6. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 1, characterized in that, Both ends of the three-phase iron core column are fixedly connected by clamps.

7. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 6, characterized in that, A silicone rubber buffer pad is provided between the core column and the clamp.

8. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 6, characterized in that, The clamp is an aluminum alloy clamp.

9. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 1, characterized in that, Each core column is wound with a winding.

10. A high-strength amorphous alloy three-dimensional wound core transformer according to claim 1, characterized in that, The thickness of the amorphous alloy strip is 0.020–0.025 mm.

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