Nanocrystal iron core with high magnetic conductivity and low coercive force

Abstract

The utility model discloses a nanocrystalline iron core with high magnetic conductivity and low coercive force, which comprises a nanocrystalline iron core main body, and strip lamination monomers are uniformly arranged on the nanocrystalline iron core main body. According to the utility model, a common integrated nanocrystalline iron core main body is arranged to be a structural body formed by winding and overlapping the strip lamination monomers, that is, the iron core is divided into multiple layers of thin strips, so that the thickness of a single layer is obviously reduced, the loss is in direct proportion to the square of the thickness according to an eddy-current loss formula, and therefore, the eddy-current loss can be greatly reduced by reducing the thickness; the insulating paint coating is arranged on the inner side wall of the nanocrystalline base material layer, flowing of eddy current between layers can be blocked through the insulating paint coating between the multiple layers of strip structures, and it is considered that eddy current loss is closely related to the microstructure, the magnetic performance and the working condition of the material; and further, the nanocrystalline substrate layer is beneficial to keeping high magnetic conductivity and low coercive force of the nanocrystalline material.

Description

Technical Field

[0001] This utility model relates to the field of iron core structure technology, specifically a nanocrystalline iron core with high magnetic permeability and low coercivity. Background Technology

[0002] Nanocrystalline iron cores are a type of high-performance soft magnetic material that generally has advantages such as low loss and wide bandwidth. They are widely used in fields such as power electronics, new energy and communication equipment. Compared with traditional materials, they have significant advantages in high frequency and high efficiency, making them an important material choice for modern electromagnetic devices.

[0003] Nanocrystalline iron cores are often integral structures with a large thickness. When such nanocrystalline iron core structures are placed in an alternating magnetic field, the change in the magnetic field will induce eddy currents inside the iron core. When these eddy currents flow inside the iron core, they will generate Joule heating due to the resistance of the material, resulting in energy loss, i.e., eddy current loss. Eddy current loss is closely related to the microstructure, magnetic properties and working conditions of the material. Therefore, eddy current loss will affect the high permeability and low coercivity of nanocrystalline iron cores used for a long time. To this end, we propose a new type of nanocrystalline iron core with high permeability and low coercivity. Utility Model Content

[0004] The purpose of this invention is to provide a nanocrystalline iron core with high magnetic permeability and low coercivity to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nanocrystalline iron core with high magnetic permeability and low coercivity, comprising a nanocrystalline iron core body, wherein strip laminates are uniformly disposed on the nanocrystalline iron core body, a nanocrystalline substrate layer is disposed inside the sidewall of the strip laminate, an insulating varnish coating is disposed on the inner sidewall of the nanocrystalline substrate layer, an organosilicon thermally conductive adhesive layer is disposed on the inner sidewall of the insulating varnish coating, a mounting bracket is clamped at the bottom of the nanocrystalline iron core body, and a second adjusting seat, a first adjusting seat, and a third adjusting seat are sequentially disposed on the top of the mounting bracket from left to right. Each of the second, first, and third adjusting seats has a limiting slide cavity inside, a limiting slider is slidably connected inside the limiting slide cavity, a dynamic pressure fastener is welded to one side of the limiting slider, a locking screw is threaded onto the dynamic pressure fastener, an anti-slip rubber block is fixed to the side of the locking screw near the limiting slide cavity, and a static pressure fastener is fixed to the top of each of the second, first, and third adjusting seats.

[0006] Preferably, the nanocrystalline iron core body has a wound structure.

[0007] Preferably, the mounting bracket has screw holes evenly distributed at the bottom edge, making it easy to vertically install the mounting bracket inside a suitable electrical equipment housing using screws.

[0008] Preferably, the dynamic pressure fastener is cylindrical in shape and is in contact with the outer wall of the nanocrystalline iron core body.

[0009] Preferably, the inner sidewalls of the nanocrystalline iron core body of the dynamic pressure fastener are in contact.

[0010] Preferably, a connecting spring is provided between the bottom of the dynamic pressure fastener and the limiting slide cavity.

[0011] Preferably, the bottom of the second adjustment seat, the first adjustment seat and the third adjustment seat are all welded with threaded mounting pins, and the threaded mounting pins and the mounting bracket form a threaded connection, which facilitates the independent disassembly and maintenance of the second adjustment seat, the first adjustment seat and the third adjustment seat.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The nanocrystalline iron core with high permeability and low coercivity has optimized its structure by installing strip laminations and other components. By setting the common integrated nanocrystalline iron core body as a structure formed by the winding and stacking of strip laminations, the iron core is divided into multiple thin strips, which significantly reduces the thickness of a single layer. According to the eddy current loss formula, the loss is proportional to the square of the thickness. Therefore, reducing the thickness can greatly reduce the eddy current loss. Furthermore, by setting an insulating varnish coating on the inner wall of the nanocrystalline substrate layer, the insulating varnish coating between the multiple strip structures can block the flow of eddy currents between layers. Eddy currents can only form closed loops inside a single strip and cannot cross the insulating layer, thus limiting the range and intensity of eddy currents. In this way, the arrangement of strip laminations and insulating layers greatly reduces the eddy current loss. Considering that eddy current loss is closely related to the microstructure, magnetic properties and working conditions of the material, the nanocrystalline substrate layer is conducive to maintaining the high permeability and low coercivity of the nanocrystalline material.

[0014] (2) The nanocrystalline iron core with high magnetic permeability and low coercivity has its performance optimized by installing an organic silicon thermal conductive adhesive layer. On the one hand, the main body of the nanocrystalline iron core is made of strip stacked single units with an attached organic silicon thermal conductive adhesive layer wound together. In actual operation, the user can pull out and cut off the appropriate length of strip stacked single units according to the required size of the nanocrystalline iron core main body. The adhesive winding structure makes it easy for the user to flexibly adjust the size of the nanocrystalline iron core main body and has strong applicability. On the other hand, when it is necessary to make the nanocrystalline iron core main body vertically flat and stable, the nanocrystalline iron core main body can be easily adjusted. When the nanocrystalline iron core body is positioned in a suitable location inside the electrical housing, the user can insert the cut end of the nanocrystalline iron core body downwards and into the static pressure fastener and dynamic pressure fastener on the second adjustment seat, the first adjustment seat, and the third adjustment seat. Then, tighten the locking screw on the dynamic pressure fastener and the limit slider, and press the inner wall of the limit slide cavity with the anti-slip rubber pressure block at its tail end. This allows the assembly of the nanocrystalline iron core body and the mounting bracket to be completed. This allows the iron core structure to be installed according to different installation requirements. Users can choose to directly insert the completed iron core into the housing and bond it, or install it in a suitable position by adding a mounting bracket to the iron core and screwing it in.

[0015] (3) The nanocrystalline iron core with high magnetic permeability and low coercivity is equipped with threaded assembly pins, so that when the iron core structure is used, threaded assembly pins are welded to the bottom of the second adjustment seat, the first adjustment seat and the third adjustment seat, and a threaded connection is formed between the threaded assembly pins and the mounting frame. This facilitates the independent disassembly and maintenance of the second adjustment seat, the first adjustment seat and the third adjustment seat on the mounting frame. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present invention;

[0017] Figure 2 This is a front view structural diagram of the mounting bracket of this utility model;

[0018] Figure 3 This is a front view cross-sectional structural diagram of the first adjusting seat of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the side wall of the strip lamination of this utility model.

[0020] In the diagram: 1. Mounting bracket; 2. First adjusting seat; 3. Strip laminate unit; 4. Nanocrystalline iron core body; 5. Second adjusting seat; 6. Third adjusting seat; 7. Dynamic pressure fastener; 8. Locking screw; 9. Static pressure fastener; 10. Limiting slide cavity; 11. Anti-slip rubber block; 12. Limiting slider; 13. Threaded assembly pin; 14. Connecting spring; 15. Organosilicon thermally conductive adhesive layer; 16. Nanocrystalline substrate layer; 17. Insulating varnish coating. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-4 An embodiment of this utility model is provided: a nanocrystalline iron core with high magnetic permeability and low coercivity, including a nanocrystalline iron core body 4, on which strip laminates 3 are uniformly disposed, and a nanocrystalline substrate layer 16 is disposed inside the sidewall of the strip laminates 3.

[0023] An insulating varnish coating 17 is provided on the inner wall of the nanocrystalline substrate layer 16, and an organosilicon thermally conductive adhesive layer 15 is provided on the inner wall of the insulating varnish coating 17.

[0024] In use, the common integrated nanocrystalline iron core body 4 is set as a structure formed by winding and stacking strip laminations 3. That is, the iron core is divided into multiple thin strips, which significantly reduces the thickness of a single layer. According to the eddy current loss formula, the loss is proportional to the square of the thickness. Therefore, reducing the thickness can greatly reduce eddy current loss. Furthermore, by providing an insulating varnish coating 17 on the inner wall of the nanocrystalline substrate layer 16, the insulating varnish coating 17 between the multi-layer strip structure can block the flow of eddy currents between layers. Eddy currents can only form closed loops inside a single strip and cannot cross the insulating layer, thereby limiting the range and intensity of eddy currents. Thus, the arrangement of strip laminations and insulating layers greatly reduces eddy current loss. Considering that eddy current loss is closely related to the microstructure, magnetic properties and working conditions of the material, the nanocrystalline substrate layer 16 is conducive to maintaining the high permeability and low coercivity of the nanocrystalline material.

[0025] The bottom of the nanocrystalline iron core body 4 is fitted with a mounting bracket 1, and the top of the mounting bracket 1 is provided with a second adjustment seat 5, a first adjustment seat 2 and a third adjustment seat 6 from left to right.

[0026] The second adjusting seat 5, the first adjusting seat 2 and the third adjusting seat 6 are all provided with a limiting slide cavity 10. The limiting slide cavity 10 is slidably connected to a limiting slider 12. A dynamic pressure fastener 7 is welded to one side of the limiting slider 12.

[0027] A locking screw 8 is threaded onto the dynamic pressure fastener 7. An anti-slip rubber block 11 is fixed on the side of the locking screw 8 near the limiting slide cavity 10. Static pressure fasteners 9 are fixed to the top of the second adjusting seat 5, the first adjusting seat 2 and the third adjusting seat 6.

[0028] The nanocrystalline iron core body 4 has a wound structure;

[0029] In use, the nanocrystalline iron core body 4 is formed by winding a strip stacked unit 3 with an attached silicone thermally conductive adhesive layer 15. In actual operation, the user can pull out and cut the strip stacked unit 3 of an appropriate length according to the required size of the nanocrystalline iron core body 4. This adhesive winding structure allows the user to flexibly adjust the size of the nanocrystalline iron core body 4, making it highly adaptable. On the other hand, when it is necessary to vertically and stably fix the nanocrystalline iron core body 4 in a suitable position inside the appliance housing, the user can... With the cut end facing downwards, it is inserted between the static pressure fastener 9 and the dynamic pressure fastener 7 on the second adjusting seat 5, the first adjusting seat 2 and the third adjusting seat 6. Then, the dynamic pressure fastener 7 and the locking screw 8 on the limiting slider 12 are tightened, and the anti-slip rubber pressure block 11 at its tail end is used to press the inner wall of the limiting slide cavity 10. This allows the assembly of the nanocrystalline iron core body 4 and the mounting bracket 1 to be realized. This allows the iron core structure to be installed according to different installation requirements. The completed iron core can be directly inserted into the housing and glued, or the mounting bracket 1 can be added to the iron core and screwed into a suitable position for installation.

[0030] An insulating varnish coating 17 is provided on the inner wall of the nanocrystalline substrate layer 16, and an organosilicon thermally conductive adhesive layer 15 is provided on the inner wall of the insulating varnish coating 17.

[0031] Screw holes are evenly distributed at the bottom edge of the mounting bracket 1, making it easy to vertically install the mounting bracket 1 inside a suitable electrical equipment housing using screws;

[0032] The dynamic pressure fastener 7 is cylindrical in shape and is in contact with the outer wall of the nanocrystalline iron core body 4.

[0033] The inner wall of the 7-nanometer crystalline iron core body 4 is in contact with the dynamic pressure fastener;

[0034] A connecting spring 14 is provided between the bottom of the dynamic pressure fastener 7 and the limiting slide cavity 10;

[0035] The bottom of the second adjusting seat 5, the first adjusting seat 2 and the third adjusting seat 6 are all welded with threaded mounting pins 13. The threaded mounting pins 13 and the mounting bracket 1 form a threaded connection, which facilitates the independent disassembly and maintenance of the second adjusting seat 5, the first adjusting seat 2 and the third adjusting seat 6.

[0036] In use, the following steps are taken in this embodiment: First, the nanocrystalline iron core body 4 is formed by winding a strip stacked unit 3 with an attached silicone thermally conductive adhesive layer 15. In actual operation, the user can pull out and cut off the strip stacked unit 3 of an appropriate length according to the required size of the nanocrystalline iron core body 4. This adhesive winding structure allows the user to flexibly adjust the size of the nanocrystalline iron core body 4, making it highly adaptable. Second, when it is necessary to vertically and stably fix the nanocrystalline iron core body 4 in a suitable position inside the electrical housing, the user can insert the cut end of the nanocrystalline iron core body 4 downwards and insert it between the static pressure fastener 9 and the dynamic pressure fastener 7 on the second adjusting seat 5, the first adjusting seat 2, and the third adjusting seat 6. Then, tighten the dynamic pressure fastener 7 and the locking screw 8 on the limiting slider 12, and press the inner wall of the limiting slide cavity 10 with the anti-slip rubber pressure block 11 at its tail end. This completes the assembly of the nanocrystalline iron core body 4 and the mounting bracket 1. This allows the iron core structure to be directly assembled according to different installation requirements. The iron core is inserted into the housing and bonded, or it is installed in a suitable position by screws through a mounting bracket 1 on the iron core. In specific operation, the common integrated nanocrystalline iron core body 4 is set as a structure formed by winding and stacking strip laminations 3. That is, the iron core is divided into multiple thin strips, which significantly reduces the thickness of a single layer. According to the eddy current loss formula, the loss is proportional to the square of the thickness. Therefore, reducing the thickness can greatly reduce eddy current loss. Furthermore, by providing an insulating varnish coating 17 on the inner wall of the nanocrystalline substrate layer 16, the insulating varnish coating 17 between the multi-layer strip structure can block the flow of eddy currents between layers. Eddy currents can only form closed loops within a single strip and cannot cross the insulating layer, thus limiting the range and intensity of eddy currents. In this way, the arrangement of strip laminations and insulating layers greatly reduces eddy current loss. Considering that eddy current loss is closely related to the microstructure, magnetic properties and working conditions of the material, the nanocrystalline substrate layer 16 is conducive to maintaining the high permeability and low coercivity of the nanocrystalline material.

Claims

1. A nanocrystalline core having high magnetic permeability and low coercivity, characterized in that, The device includes a nanocrystalline iron core body (4), on which strip laminated units (3) are uniformly disposed. A nanocrystalline substrate layer (16) is disposed inside the sidewall of the strip laminated units (3). An insulating varnish coating (17) is disposed on the inner sidewall of the nanocrystalline substrate layer (16). An organosilicon thermally conductive adhesive layer (15) is disposed on the inner sidewall of the insulating varnish coating (17). A mounting bracket (1) is fitted at the bottom of the nanocrystalline iron core body (4). A second adjustment seat (5), a first adjustment seat (2), and a third adjustment seat (3) are sequentially disposed on the top of the mounting bracket (1) from left to right. 6) The second adjusting seat (5), the first adjusting seat (2) and the third adjusting seat (6) are all provided with a limiting slide cavity (10). The limiting slide cavity (10) is slidably connected to a limiting slider (12). A dynamic pressure fastener (7) is welded to one side of the limiting slider (12). A locking screw (8) is threaded onto the dynamic pressure fastener (7). An anti-slip rubber block (11) is fixed to the side of the locking screw (8) near the limiting slide cavity (10). A static pressure fastener (9) is fixed to the top of the second adjusting seat (5), the first adjusting seat (2) and the third adjusting seat (6).

2. The nanocrystalline core with high permeability and low coercivity according to claim 1, characterized in that: The nanocrystalline iron core body (4) has a wound structure.

3. The nanocrystalline core with high permeability and low coercivity according to claim 1, characterized in that: The mounting bracket (1) has screw holes evenly distributed at the bottom edge.

4. The nanocrystalline core having high permeability and low coercivity of claim 1, wherein: The dynamic pressure fastener (7) is cylindrical in shape and is in contact with the outer wall of the nanocrystalline iron core body (4).

5. The nanocrystalline core of claim 1, wherein the nanocrystalline core has a high magnetic permeability and a low coercivity. The dynamic pressure fastener (7) is in contact with the inner wall of the nanocrystalline iron core body (4).

6. The nanocrystalline core of claim 1 having high permeability and low coercivity, wherein: A connecting spring (14) is provided between the bottom of the dynamic pressure fastener (7) and the limiting slide cavity (10).

7. A nanocrystalline iron core with high magnetic permeability and low coercivity according to claim 1, characterized in that: The bottom of the second adjustment seat (5), the first adjustment seat (2) and the third adjustment seat (6) are all welded with threaded assembly pins (13), and the threaded assembly pins (13) and the mounting bracket (1) form a threaded connection.

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