Magnetic assembly and its carrier

Abstract

This invention provides a magnetic assembly that minimizes volume and improves overall performance, as well as a carrier for the magnetic assembly that effectively holds the coil and stably positions the core. [Solution] A magnetic assembly 1 comprising a carrier 20, at least one core, and a coil 30, wherein the carrier includes two ends E1, E2, at least one internal housing space 21, and an external winding section 22. The two ends are located at opposite ends of the carrier, and the external winding section is located between the two ends. The at least one core includes at least one first core 11 and at least one second core 12, wherein at least one first core is located within at least one internal housing space, and at least one second core is located outside the carrier. The coil includes a self-fusing winding that is wound around the external winding section and aligned along the alignment direction. The perpendicular projections of the two ends of the carrier onto a plane perpendicular to the alignment direction overlap and are less than or equal to the perpendicular projection of the external winding section of the carrier onto the same plane.

Description

[Technical Field]

[0001] The present invention relates to a magnetic assembly and a carrier thereof, and in particular to a magnetic assembly and a carrier thereof that can effectively reduce the overall volume and improve the overall performance. [Background Art]

[0002] In the design of current magnetic assemblies, as shown in FIG. 1, a coil 81 is usually wound around a bobbin 82 and then assembled with a magnetic core. Opposite ends of the bobbin 82 are provided with stoppers 821 for preventing the winding 811 from falling off the bobbin 82. However, the arrangement of the stoppers 821 leads to wasted space.

[0003] Generally, as a winding, a polyimide (PI) insulated wire 90 as shown in FIG. 2 is often used. The insulating outer layer 91 is generally coated in a tape form by a lapping method on the outside of a plurality of bare copper wires 92 or a plurality of litz wires 92, so as to increase insulation performance and meet the requirements of safety standards. As a result, an overlapping region A is formed, for example, the overlapping rate between adjacent insulating outer layers 91 is about 50% to 67%. This increases the thickness of the insulating outer layer 91, especially when the windings are aligned and wound on the bobbin, the space occupied by the insulating outer layer 91 between adjacent windings is doubled, resulting in wasted space. Furthermore, such a lapping method causes uneven thickness of the insulating outer layer 91, which adversely affects heat dissipation of the winding, and consequently affects the performance of the magnetic assembly.

[0004] Furthermore, when employing a multi-air-gap design in magnetic assemblies, spacers are typically placed between the cores, and the cores and spacers are often fixed together with adhesive. This method not only complicates the assembly process but also requires a long time for the adhesive to dry and cure. Consequently, manufacturing such magnetic assemblies requires a significant amount of manpower and time, making the introduction of automated production difficult.

[0005] Therefore, in order to overcome the shortcomings of the conventional technology described above, it is necessary to develop a magnetic assembly and its carrier. [Overview of the project] [Problems that the invention aims to solve]

[0006] The objective of this invention is to provide a magnetic assembly that minimizes volume and improves overall performance by using a carrier instead of a bobbin in the conventional art and combining it with self-fusing windings.

[0007] Another objective of this invention is to provide a carrier for a magnetic assembly that can effectively hold a coil and stably position a core. [Means for solving the problem]

[0008] To achieve the above objective, the present invention provides a magnetic assembly comprising a carrier, at least one core, and a coil. The carrier comprises two ends, at least one internal housing space, and an external winding section, the two ends located at opposite ends of the carrier, and the external winding section located between the two ends. The at least one core comprises at least one first core and at least one second core, the at least one first core located within at least one internal housing space, and the at least one second core located outside the carrier. The coil comprises a self-fusing winding that is wound around the external winding section and aligned along the alignment direction. The perpendicular projections of the two ends of the carrier onto a plane perpendicular to the alignment direction overlap and are less than or equal to the perpendicular projection of the external winding section of the carrier onto the same plane.

[0009] In one embodiment, at least one internal housing space is configured to have an opening on the surface of the external winding portion.

[0010] In one embodiment, at least one internal housing space includes a plurality of internal housing spaces spaced apart from each other, and at least one first core includes a plurality of first cores, each of which is located within a plurality of internal housing spaces, thereby forming a plurality of air gaps inside the magnetic assembly.

[0011] In one embodiment, the carrier further includes at least one first coupling portion located at at least one of the two ends of the carrier, and at least one second core further includes at least one second coupling portion, wherein the at least one first coupling portion and the at least one second coupling portion are mechanically engaged with each other.

[0012] In one embodiment, at least one first coupling portion is used to connect with a winding jig.

[0013] In one embodiment, the carrier is positioned on the surface of the outer winding portion and further includes at least one positioning portion for positioning the self-fusing winding.

[0014] In one embodiment, the self-fusing winding includes a plurality of bare copper wires or Litz wires and an insulating layer, the insulating layer covering the outside of the plurality of bare copper wires or Litz wires and being configured as a single layer of uniform thickness.

[0015] In one embodiment, the insulating layer becomes tacky when heated, thereby bonding adjacent self-fusing windings together.

[0016] In one embodiment, the insulating layer includes an insulating thermal conductive material.

[0017] To achieve the above objective, the present invention also provides a carrier applicable to a magnetic assembly. The magnetic assembly includes at least one first core, at least one second core, and a coil, the coil including a self-fusing winding. The carrier includes two ends, at least one internal housing space, and an external winding section. The two ends are located at opposite ends of the carrier, the at least one internal housing space is used to house at least one first core, the external winding section is located between the two ends, and the self-fusing winding is wound around the external winding section and aligned along the alignment direction. The perpendicular projections of the two ends onto a plane perpendicular to the alignment direction overlap and are less than or equal to the perpendicular projection of the external winding section onto the same plane.

[0018] In one embodiment, at least one internal housing space is configured to have an opening on the surface of the external winding portion.

[0019] In one embodiment, the carrier further includes at least one first coupling portion located at at least one of the two ends of the carrier, and at least one second core further includes at least one second coupling portion, wherein the at least one first coupling portion and the at least one second coupling portion are mechanically engaged with each other.

[0020] In one embodiment, the carrier is positioned on the surface of the outer winding portion and further includes at least one positioning portion for positioning the self-fusing winding. [BRIEF DESCRIPTION OF THE DRAWINGS]

[0021] [Figure 1] It is a schematic diagram showing a conventional bobbin around which a winding is wound. [Figure 2] It is a cross-sectional view of a conventional winding. [Figure 3] It is an exploded schematic diagram of a magnetic assembly according to an embodiment of the present invention. [Figure 4A] It is an exploded schematic diagram, viewed from one angle, of a combined body of a carrier and a coil, and a first core and a second core according to an embodiment of the present invention. [Figure 4B] It is an exploded schematic diagram, viewed from another angle, of a combined body of a carrier and a coil, and a first core and a second core according to an embodiment of the present invention. [Figure 5] It is an assembled schematic diagram of a magnetic assembly according to an embodiment of the present invention. [Figure 6] It is a cross-sectional view taken along line B-B' in FIG. 5. [Figure 7A] It is a schematic diagram, viewed from one angle, of a carrier according to an embodiment of the present invention. [Figure 7B] It is a schematic diagram, viewed from another angle, of a carrier according to an embodiment of the present invention. [Figure 8] It is a cross-sectional view of a self-bonding winding according to an embodiment of the present invention. [Figure 9] It is a schematic diagram showing a state where a self-bonding winding is wound around a carrier according to an embodiment of the present invention. [Figure 10] It is a schematic diagram showing a state where a self-bonding winding is wound around a carrier according to another embodiment of the present invention. [Figure 11] It is a schematic diagram of a carrier according to another embodiment of the present invention. [Figure 12] It is an exploded schematic diagram of a combined body of a carrier and a coil, and a first core and a second core according to another embodiment of the present invention. [Figure 13] It is a schematic diagram of a combined body of a coil and a carrier according to another embodiment of the present invention. [DESCRIPTION OF EMBODIMENTS FOR CARRYING OUT THE INVENTION]

[0022] Several typical embodiments demonstrating the features and advantages of the present invention will be described in detail in the following description. The present invention can be modified in various ways in different embodiments, none of which deviate from the scope of the present invention. It should be understood that the descriptions and drawings are provided for illustrative purposes only and are not intended to limit the present invention.

[0023] Please refer to Figures 3, 4A-4B, 5, and 6. The magnetic assembly 1 of the present invention includes a first core 11, a second core 12, a carrier 20, and a coil 30. The first core 11 is located inside the carrier 20, the second core 12 is located outside the carrier 20, and the coil 30 is located on the carrier 20 and includes a self-fusing winding 31. The carrier 20 includes an internal housing space 21, an external winding section 22, and two ends E1 and E2. The two ends E1 and E2 are located at opposite ends of the carrier 20, the external winding section 22 is located between the two ends E1 and E2, and the internal housing space 21 is located inside the external winding section 22. Thus, the internal housing space 21 is also located between the two ends E1 and E2. The internal housing space 21 is used to house the first core 11, and the external winding section 22 is for the coil 30 to be placed on top of it. In the external winding section 22, the self-fusing windings 31 of the coil 30 are wound in an aligned manner along the alignment direction D and are adjacent to each other. The alignment direction D refers to the direction parallel to the long axis of the carrier 20.

[0024] As shown in Figures 7A and 7B, in one embodiment, the periphery of each of the two ends E1 and E2 of the carrier 20 is flush with the surface of the adjacent external winding section 22. In other words, the two ends E1 and E2 of the carrier 20 are configured so that a stopper 821, as shown in Figure 1, is not installed, and the two ends E1 and E2 of the carrier 20 do not have a structure that protrudes outward from the surface of the external winding section 22. In this embodiment, the perpendicular projections of the two ends E1 and E2 of the carrier 20 onto a plane perpendicular to the alignment direction D overlap and are less than or equal to the perpendicular projection of the external winding section 22 onto the same plane. By eliminating the structural design of the stopper provided at the end of the bobbin in the prior art, the overall volume of the carrier 20 can be effectively reduced. As confirmed by experiment, compared to a bobbin 82 with the stopper 821 shown in Figure 1, the carrier 20 of this invention without a stopper can save at least 10.5% of space.

[0025] In some embodiments, assuming that the carrier 20 is not equipped with a stopper 821 as shown in Figure 1, the present invention uses a self-bonding wire 31 to form the coil 30 so that the coil 30 can be maintained in a position on the carrier 20. As shown in Figure 8, the self-bonding wire 31 includes a plurality of bare copper wires 311 or a plurality of Litz wires 311 and an insulating layer 312 placed outside the bare copper wires / Litz wires 311. The insulating layer 312 can become tacky when heated, so that when the self-bonding wire 31 is wound around the outer winding section 22, adjacent windings can be bonded together, and thus the self-bonding wire 31 can be positioned so that it does not fall off the outer winding section 22. For example, by blowing hot air onto the self-bonding wire 31 during winding, the insulating layer 312 of the self-bonding wire 31 can be heated to, for example, 120°C to 200°C to make it tacky. In one embodiment, the insulating layer 312 includes, but is not limited to, a hot-melt adhesive.

[0026] Furthermore, as shown in Figure 8, the insulating layer 312 is formed as a single layer of uniform thickness. In other words, the insulating layer 312, which is placed on the outside of the bare copper wire / litz wire 311, does not overlap with each other or have uneven thickness. For example, the insulating layer 312 is formed on the outside of the bare copper wire / litz wire 311 in a continuous coating manner, thereby forming a single layer of uniform thickness. Therefore, while maintaining the number of bare copper wires / litz wires 311 inside, the wire diameter of the self-fusing winding 31 can be reduced, and adjacent self-fusing windings 31 can be uniformly and tightly attached at equal intervals. This further reduces the volume of the formed coil 30. As confirmed by experiments, assuming the same number of turns in the winding, the volume of the combination of the carrier 20 and the self-fusing winding 31 of this invention can be reduced by approximately 34% or more compared to the case where a bobbin 82 as shown in Figure 1 and a PI film coated wire 90 as shown in Figure 2 are used.

[0027] On the other hand, the uniform thickness of the insulating layer 312 allows the heat dissipation from the winding to be more uniformly distributed to the surroundings. As confirmed by experiment, compared to a PI film coated wire 90 using an insulating outer layer 91 having an overlapping region A as shown in Figure 2, the coil 30 using the self-fusing winding 31 having a single layer insulating layer 312 of the present invention can effectively reduce the temperature by about 3°C ​​during the operation of the magnetic assembly 1, contributing to an overall improvement in the performance of the magnetic assembly 1. The insulating layer 312 may contain insulating thermal conductive materials such as aluminum oxide, boron nitride, magnesium oxide, silicon dioxide, aluminum nitride, or a combination thereof to further improve the heat dissipation capacity of the self-fusing winding 31 and the coil 30. As confirmed by experiments, compared to a PI film coated wire 90 using an insulating outer layer 91 having an overlapping region A as shown in Figure 2, the coil 30 formed by the self-fusing winding 31 using the insulating layer 312 containing the insulating thermal conductive material of the present invention can effectively reduce the temperature by approximately 6°C during the operation of the magnetic assembly 1, contributing to further improvement of the overall performance of the magnetic assembly 1.

[0028] Specifically, this invention minimizes the volume of the assembly between the carrier 20 and the coil 30 by using a carrier 20 without a stopper and a self-fusing winding 31 including a single-layer insulating layer 312, thereby improving the heat dissipation efficiency of the coil 30 and significantly contributing to improved internal space utilization and overall performance of the magnetic assembly 1.

[0029] Furthermore, if the wire diameter of the winding used to form the coil remains constant, the overlapping region A shown in Figure 2 is saved because the insulating layer 312 used in the self-fusing winding 31 of this invention is a single layer. Therefore, the number of internal bare copper wires / litz wires 311 can be further increased. This reduces resistance and decreases winding loss. As confirmed by experiment, compared to a PI film coated wire 90 using an insulating outer layer 91 having the overlapping region A shown in Figure 2, the self-fusing winding 31 using the single-layer insulating layer 312 of this invention can reduce winding loss by approximately 21.7% or more for the same wire diameter.

[0030] In one embodiment, as shown in Figure 9, the coil 30 can be formed by directly winding a self-fusing winding 31 onto the carrier 20, thereby forming a coil 30 that is in close contact with the carrier 20. In another embodiment, as shown in Figure 10, the coil 30a can also be formed by first winding it onto a winding jig (not shown) and then placing it on the carrier 20. This forms a coil 30a with a gap 40 between it and the carrier 20. Note that the coil placement in this invention is not limited to the embodiments described above and can be modified according to the actual application.

[0031] Furthermore, in one embodiment, as shown in Figure 11, the carrier 20b may include a positioning portion 24 located on the surface of the outer winding portion 22 to provide the effect of positioning the self-fusing winding 31 when winding the self-fusing winding 31 directly onto the carrier 20b to form the coil 30. For example, by holding the self-fusing winding 31 on the outer winding portion 22 before the insulating layer 312 of the self-fusing winding 31 becomes sticky due to heating, the winding procedure can proceed smoothly. For example, the positioning portion 24 can be realized as a recessed groove formed inward from the surface of the outer winding portion 22, or as a groove formed by two ribs protruding from the surface of the outer winding portion 22. Anything that can achieve the positioning function and does not increase the volume after coil formation is included in the scope of this invention and is not limited to what is shown in the drawings.

[0032] In some embodiments, as shown in Figures 3, 6, and 7A, the internal housing space 21 is configured to have an opening on the surface of the external winding section 22. That is, the orientation of the internal housing space 21 is substantially perpendicular to the alignment direction D of the self-fusing winding 31 and also perpendicular to the longitudinal axis of the carrier 20. In other words, as shown in Figure 3, the first core 11 is housed in the internal housing space 21 from top to bottom through the corresponding opening.

[0033] In the prior art, as shown in Figure 1, the bobbin 82 has a hollow section 822 that penetrates both opposing ends, and the core is inserted through the ends of the bobbin 82. That is, the core is inserted into the hollow section 822 of the bobbin 82 in a direction parallel to the alignment direction D of the winding 811 on the bobbin 82. Therefore, in order to assemble the core smoothly, it is usually necessary to secure the tolerance required for assembly in advance in the inner diameter of the bobbin, and as a result the volume of the bobbin increases.

[0034] In some embodiments of the present invention, the first core 11 is housed within the carrier 20 by directly installing an internal housing space 21 having an opening on the surface of the external winding portion 22. First, the first core 11 can be pre-installed inside the carrier 20 without increasing the volume to ensure assembly tolerances. Second, since the insertion direction of the first core 11 is perpendicular to the alignment direction D of the self-fusing winding 31, the position of the first core 11 can be stably maintained during the winding of the self-fusing winding 31. Furthermore, the predetermined position of the internal housing space 21 allows for effective positioning of the relative position between the first core 11 and the carrier 20. Thus, not only can the volume of the combined body of the carrier 20 and the coil 30 be minimized, but this also contributes to improving the space utilization rate of the magnetic assembly 1 and the overall performance of the magnetic assembly 1.

[0035] In one embodiment, as shown in Figures 3, 6, and 7A, the carrier 20 includes a plurality of internal housing spaces 21 spaced apart from each other, so that the first cores 11 placed in each internal housing space 21 are spaced apart from each other, and thus multiple air gaps can be formed inside the magnetic assembly 1. For example, an air gap can be formed between any two first cores 11, and by forming multiple air gaps, winding losses can be reduced. With such a structural design, while in the prior art it was necessary to perform procedures such as placing spacers between cores or applying adhesive to achieve a multi-air gap design, the carrier 20 of the present invention can form multiple air gaps inside the magnetic assembly 1 simply by placing each first core 11 in each internal housing space 21, effectively simplifying the assembly procedure and facilitating the introduction of an automated assembly process. Furthermore, since the distance between adjacent first cores 11 is determined by the distance between adjacent internal housing spaces 21, the problem of artificial operating procedures such as adhesive application affecting the position of the air gaps is eliminated, a more stable air gap structure can be formed, and the overall performance of the magnetic assembly 1 is improved. Therefore, compared to conventional technology, the carrier 20 of the present invention can provide a solution that achieves a multi-air gap structure that is more time-efficient, more stable, and further contributes to the introduction of automated work. The number of internal accommodation spaces 21 is not limited to the embodiments described above and can be changed without limitation to, for example, four, three, or two, depending on the actual application needs. In other embodiments, the carrier 20 may be configured to include a single internal accommodation space 21 for accommodating a single first core 11, which can similarly improve the installation stability of the first core 11 within the carrier 20. In one embodiment, the carrier 20 is preferably made of an insulating material, but is not limited thereto.

[0036] In one embodiment, as shown in Figures 4A-4B and 7A-7B, the carrier 20 further includes first coupling portions 23 positioned at ends E1 and E2 of the carrier 20. Correspondingly, the second core 12 is provided with a second coupling portion 121 that mechanically engages with the first coupling portion 23. For example, the first coupling portion 23 is provided as a recess and the second coupling portion 121 as a convex portion, thereby achieving mechanical engagement between the concave and convex structures. This structural design allows for quick and effective positioning of the relative positions of the carrier 20, coil 30, and first core 11 with respect to the second core 12. This makes the overall structure of the magnetic assembly 1 more stable and facilitates the introduction of automated assembly procedures. Since the opening of the internal housing space 21 is provided on the surface of the external winding portion 22, the first coupling portion 23 can be installed at ends E1 and E2 of the carrier 20. Therefore, positioning of the first core 11 can be achieved simultaneously with positioning of the second core 12.

[0037] Depending on the installation position of the second core 12, the first coupling portion 23 can be positioned at one end of the carrier 20 or at both opposing ends, and is modifiable according to the actual application, and is not limited to those shown in the drawings. Furthermore, the structure for achieving mechanical engagement between the first coupling portion 23 and the second coupling portion 121 can be implemented in shapes other than the three-dimensional rectangle shown in Figures 4A and 4B, such as a cylindrical shape, an elliptical shape, or other three-dimensional polygonal prism shape. Any shape that can achieve mechanical engagement and positioning between the carrier 20 and the second core 12 is included in the scope of this invention.

[0038] As described above, the carrier 20 of this invention not only reduces its own volume by adopting a structural design without stoppers, but also simultaneously ensures the positioning effect of the first core 11 and the second core 12 by installing the internal storage space 21 and the first connecting part 23.

[0039] Furthermore, when the self-fusing winding 31 is wound directly onto the carrier 20 to form a coil 30, the first coupling portion 23 can also be used to connect with a winding jig (not shown). For example, the first coupling portion 23 located at end E1 is configured to have a shape that can engage with a winding jig, so that the winding jig can engage with the first coupling portion 23 to support the carrier 20 and perform the winding process of winding the self-fusing winding 31 onto the surface of the external winding portion 22. Thus, a single carrier structure can be applied to various application scenes, improving flexibility in use. For example, the first coupling portions 23 located at the two ends E1 and E2 of the carrier 20 can have different structures. For example, the first coupling portion 23 located at end E1 can be configured to provide more engagement space than the first coupling portion 23 located at end E2, thereby ensuring a more stable connection with the winding jig. In this case, the second coupling portion 121 on the second core 12 also has a different structure accordingly. Therefore, the installation of the first coupling portion 23 can be modified according to the actual application requirements and is not limited to what is shown in the drawings.

[0040] In some embodiments, the magnetic assembly may include multiple coils depending on the requirements of the actual application. For example, in one embodiment, as shown in Figure 12, the magnetic assembly 1c includes multiple carriers 20 and multiple coils 30, for example, three carriers 20 and three coils 30, and the second core 12c of the magnetic assembly 1c is configured to have three second couplings 121c for coupling with first couplings 23 of the carriers 20 that hold each coil 30. In another embodiment, the magnetic assembly includes one carrier and multiple coils, for example, when the magnetic assembly is implemented as a transformer, as shown in Figure 13, the transformer includes a carrier 20 and two coils 30d1, 30d2. The two coils 30d1, 30d2 are both formed by winding self-fusing windings 31 and are installed in conjunction with the carrier 20. The two coils 30d1, 30d2 can be configured as a primary coil and a secondary coil, with coil 30d2 wound on the outside of coil 30d1. Furthermore, different coils within the same magnetic assembly can be implemented in different forms; for example, one portion may be formed by winding a self-fusing winding 31 around the carrier 20, while another portion may be implemented without a self-fusing winding. Therefore, it is modifiable according to the actual application scenario and is not limited to what is depicted in the drawings.

[0041] As described above, the magnetic assembly of this invention achieves volume minimization and overall performance improvement by using a carrier instead of a bobbin in the conventional art and combining it with a coil using self-fusing windings. In the carrier, the stopper used in the conventional art to prevent winding detachment is removed, and an internal housing space with an opening in the external winding section is installed, thereby reducing its own volume, positioning the core, and / or forming a multi-air gap structure. Furthermore, by forming the coil using self-fusing windings with a single-layer insulating layer, effects such as preventing coil detachment, minimizing coil volume, and / or reducing winding losses are achieved. Therefore, these elements work together to significantly improve the internal space utilization rate and overall performance of the magnetic assembly.

[0042] The above is merely a preferred embodiment for explaining the present invention, and the present invention is not limited to the embodiments described. The scope of the present invention is defined by the attached utility model claims. Furthermore, those skilled in the art can make various modifications to the present invention, but none of these modifications will deviate from the scope of the attached utility model claims. [Explanation of symbols]

[0043] 1, 1c: Magnetic assembly 11: First Core 12, 12c: Second core 121, 121c: 2nd joint 20, 20b: Career 21: Internal containment space 22: External winding section 23: 1st joint 24: Positioning section 30, 30a, 30d1, 30d2: Coil 31: Self-fusing winding 311: Bare copper wire (Litz wire) 312: Insulating layer 40: Gap 81: Coil 811: Winding 82: Bobbin 821: Stopper 822: Hollow part 90: PI film coated wire 91: Insulating outer layer 92: Bare copper wire (Litz wire) A: Overlapping area B-B': Cross section D: Alignment direction E1, E2: End

Claims

1. A magnetic assembly comprising a carrier, at least one core, and a coil, The carrier includes two ends, at least one internal housing space, and an external winding section, wherein the two ends are located at opposite ends of the carrier, and the external winding section is located between the two ends. The at least one core includes at least one first core and at least one second core, wherein the at least one first core is located within the at least one internal housing space and the at least one second core is located outside the carrier. The coil includes a self-fusing winding, which is wound around the outer winding portion and aligned along the alignment direction. The perpendicular projections of the two ends of the carrier onto a plane perpendicular to the alignment direction overlap and are less than or equal to the perpendicular projection of the outer winding portion of the carrier onto the plane. Magnetic assembly.

2. The magnetic assembly according to claim 1, wherein the at least one internal housing space is configured to have an opening on the surface of the external winding portion.

3. The magnetic assembly according to claim 1, wherein the at least one internal housing space includes a plurality of internal housing spaces arranged at intervals from each other, the at least one first core includes a plurality of first cores, and the plurality of first cores are each arranged in the plurality of internal housing spaces, thereby forming a plurality of air gaps inside the magnetic assembly.

4. The magnetic assembly according to claim 1, wherein the carrier further includes at least one first coupling portion disposed at at least one of the two ends of the carrier, the at least one second core further includes at least one second coupling portion, and the at least one first coupling portion and the at least one second coupling portion are mechanically engaged with each other.

5. The magnetic assembly according to claim 4, wherein the at least one first coupling portion is configured to be coupled to a winding jig.

6. The magnetic assembly according to claim 1, wherein the carrier is disposed on the surface of the external winding portion and further includes at least one positioning portion for positioning the self-fusing winding.

7. The magnetic assembly according to claim 1, wherein the self-fusing winding comprises a plurality of bare copper wires or Litz wires and an insulating layer, the insulating layer covering the outside of the plurality of bare copper wires or Litz wires and configured as a single layer of uniform thickness.

8. The magnetic assembly according to claim 7, wherein the insulating layer becomes tacky when heated, thereby bonding adjacent self-fusing windings together.

9. The magnetic assembly according to claim 7, wherein the insulating layer includes an insulating thermal conductive material.

10. A carrier applied to a magnetic assembly, The magnetic assembly includes at least one first core, at least one second core, and a coil, the coil including a self-fusing winding. The carrier includes two ends, at least one internal housing space, and an external winding section. The two ends are located at opposite ends of the carrier, The at least one internal housing space is used to install the at least one first core, The external winding section is located between the two ends, and the self-fusing winding is wound around the external winding section and aligned along the alignment direction. The perpendicular projections of the two ends onto a plane perpendicular to the alignment direction overlap and are less than or equal to the perpendicular projection of the outer winding portion onto the plane. Career.

11. The carrier according to claim 10, wherein the at least one internal housing space is configured to have an opening on the surface of the external winding portion.

12. The carrier according to claim 10, further comprising at least one first coupling portion disposed at at least one of the two ends of the carrier, wherein the at least one second core further comprises at least one second coupling portion, and the at least one first coupling portion and the at least one second coupling portion are mechanically engaged with each other.

13. The carrier according to claim 10, further comprising at least one positioning portion disposed on the surface of the external winding portion for positioning the self-fusing winding.

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