Magnetic structure, magnetic integrated structure and electrical equipment
By using strip-shaped magnetic conductive material to wind the magnetic core structure, the problems of core loss and cost increase caused by cutting the strip material in the existing technology are solved, and more efficient flux confinement and lower phase-to-phase coupling are achieved.
Patent Information
- Application Number
- CN202422893134.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The existing three-phase reactor has the problem of increased core loss, decreased magnetic performance, and increased material and processing costs due to cutting of strip materials during the manufacturing process.
The core structure is wound with strip-shaped magnetic conductive material, eliminating the cutting step and forming the core by stacking, which reduces processing costs and maintains magnetic properties.
It reduces material waste and processing costs, avoids core performance degradation and noise, confines the magnetic flux in the magnetic circuit to the maximum extent, and reduces phase coupling.
Smart Images
Figure CN223427334U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of power electronics, and particularly relates to a magnetic structure, a magnetic integrated structure and an electrical device. BACKGROUND
[0002] The existing three-phase reactors are generally integrated in a longitudinal or transverse stacking manner. Exemplarily, a three-phase reactor is integrated in a longitudinal stacking manner through upper and lower yokes in a shell structure, and the windings are wound on the middle columns of the phases, and the side columns and the yokes adopt high magnetic permeability materials.
[0003] However, the high magnetic permeability materials used for the yokes and the side columns are generally in the form of strip-shaped raw materials, which need to be wound into rectangular or track-shaped magnetic cores with curvature in the manufacturing process, and then the long rectangular magnetic cores can be obtained through cutting and cutting surface treatment after cutting. On the one hand, the magnetic core part with curvature will be wasted, increasing the additional material cost, and on the other hand, the cutting and cutting surface treatment will increase the processing cost, and at the same time, the magnetic properties of the cutting surface and the surrounding material will be reduced, and the magnetic core loss will be increased. CONTENT OF THE INVENTION
[0004] Therefore, the application provides a magnetic structure, a magnetic integrated structure and an electrical device, which can solve the problems of increased magnetic core loss, reduced magnetic properties, and increased material cost and processing cost caused by cutting strip-shaped materials in the prior art.
[0005] In a first aspect, the application provides a magnetic structure, which comprises a first magnetic core structure, a middle column supported in the first magnetic core structure, and a winding wound on the middle column, wherein the first magnetic core structure comprises a strip-shaped magnetic conductive material, and the strip-shaped magnetic conductive material is wound at least one layer.
[0006] Optionally, the strip-shaped magnetic conductive material is any one of nanocrystalline material, silicon steel and amorphous material.
[0007] Optionally, the middle column is provided with at least one air gap in the axial direction of the middle column.
[0008] Optionally, the magnetic structure further comprises a yoke column located in the first magnetic core structure, the middle column comprises two sub-segments, the two ends of the yoke column are respectively in abutment with the first magnetic core structure, one end of each of the two sub-segments is respectively in abutment with the two sides of the yoke column, and the other end of each of the two sub-segments is respectively in abutment with the first magnetic core structure, and the winding is wound on the outer periphery of each of the sub-segments.
[0009] Optionally, the magnetic structure also includes at least two yoke columns located within the first magnetic core structure, the middle column includes a plurality of sub-segments, the number of the sub-segments is one more than the number of the yoke columns, the two ends of each yoke column are respectively against the first magnetic core structure, the at least two yoke columns are spaced apart in the first direction, the plurality of sub-segments are arranged in a straight line in a second direction perpendicular to the first direction, a sub-segment is arranged between each adjacent two yoke columns, and a sub-segment is each against the two outermost yoke columns located in the second direction and the first magnetic core structure, and the winding is wrapped around the outer circumference of each sub-segment.
[0010] In the second aspect, the present application also provides a magnetic integrated structure, which includes a second magnetic core structure and at least two magnetic structures as described above, and the at least two magnetic structures are arranged in the second magnetic core structure, and the second magnetic core structure includes a strip-shaped magnetic conductive material, and the strip-shaped magnetic conductive material is wound in at least one layer.
[0011] Optionally, the axes of the central columns of the magnetic structures are collinearly arranged.
[0012] Optionally, the central columns of the magnetic structures are arranged at intervals in a direction perpendicular to the central column.
[0013] Optionally, the number of the magnetic structures is three, and the magnetic integration structure is a three-phase seven-pillar magnetic integration structure; or the number of the magnetic structures is four, and the magnetic integration structure is a four-phase nine-pillar magnetic integration structure.
[0014] Optionally, the first magnetic core structure and the second magnetic core structure have the same stacking thickness.
[0015] In a third aspect, the present application also provides an electrical device, which includes the magnetic integrated structure as described above.
[0016] In an embodiment of the present application, the first magnetic core structure is made by winding at least one layer of strip-shaped magnetic conductive material, thereby eliminating the step of cutting the strip-shaped magnetic conductive material, reducing the processing cost of cutting and cutting surface treatment, and using the entire strip-shaped magnetic conductive material as the first magnetic core structure without causing material waste; and avoiding the reduction in magnetic core performance caused by cutting the strip-shaped magnetic conductive material and the additional noise caused by the cut surface; in addition, the magnetic flux can be confined to the magnetic circuit of each phase to the maximum extent, thereby reducing the coupling between the phases. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of a magnetic structure provided in Example 1 of the present application;
[0018] Figure 2 A schematic diagram of another magnetic structure provided in Example 1 of the present application;
[0019] Figure 3 A schematic diagram of a longitudinally arranged magnetic integrated structure without windings provided in the second embodiment of the present application;
[0020] Figure 4 A schematic diagram of a longitudinally arranged magnetic integrated structure including windings provided in the second embodiment of the present application;
[0021] Figure 5 A schematic cross-sectional view of a magnetic integrated structure provided in Example 2 of the present application;
[0022] Figure 6 This is a schematic diagram of a horizontally arranged magnetic integrated structure provided in Example 2 of the present application. DETAILED DESCRIPTION
[0023] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.
[0024] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0025] The following describes in detail a magnetic structure, a magnetic integrated structure, and an electrical device provided by the embodiments of the present application through specific embodiments and their application scenarios in conjunction with the accompanying drawings.
[0026] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a magnetic structure provided in Example 1 of this application. Figure 1 As shown, the embodiment of the present application provides a magnetic structure 10, which includes a first magnetic core structure 11, a middle column 12 supported and arranged in the first magnetic core structure 11, and a winding ( Figure 1 (not shown), wherein the first magnetic core structure 11 includes a strip-shaped magnetic conductive material, and the strip-shaped magnetic conductive material is wound with at least one layer.
[0027] In some embodiments, the strip-shaped magnetic conductive material is a high-permeability material, and the material is in the form of a strip. The strip-shaped magnetic conductive material is wound in a ring shape and is wound in at least one layer. Exemplarily, the strip-shaped magnetic conductive material is wound on the outside of the center column 12 and the winding, and is wound in at least one layer. The first magnetic core structure 11 finally formed can be rectangular, runway-shaped, ring-shaped, etc. When the first magnetic core structure 11 is rectangular, it can specifically be a rectangle with chamfered corners. When the strip-shaped magnetic conductive material is wound in multiple layers, it is stacked in the thickness direction. The required thickness of the first magnetic core structure 11 can be achieved by controlling the number of winding layers of the strip-shaped magnetic conductive material. This process does not require additional processing, such as cutting and post-cutting processing.
[0028] Therefore, in the embodiment of the present application, the first magnetic core structure 11 is made by winding at least one layer of strip-shaped magnetic conductive material, which eliminates the step of cutting the strip-shaped magnetic conductive material, reduces the processing cost of cutting and cutting surface treatment, and does not cause material waste; and avoids the reduction in magnetic core performance caused by cutting the strip-shaped magnetic conductive material and the additional noise caused by the cutting surface; in addition, it can also maximize the confinement of the magnetic flux in the magnetic circuit of each phase, reducing the coupling between the phases.
[0029] In some embodiments, a coating is provided on the surface of the strip of magnetic conductive material. This coating is an insulating material. When the strip of magnetic conductive material is wound into at least two layers, this coating exists between adjacent layers of the strip of magnetic conductive material, thereby insulating and isolating the adjacent layers. In this case, the coating can be considered to be a coating on the strip of magnetic conductive material itself.
[0030] In some other embodiments, the first magnetic core structure 11 further includes an insulating layer. When the strip-shaped magnetic conductive material is wound into at least two layers, the insulating layer exists between adjacent layers of the strip-shaped magnetic conductive material, thereby isolating the adjacent layers. In this case, the insulating layer can be considered to be an additional layer added during the winding process.
[0031] The above-mentioned different insulating connection modes may depend on the manufacturing process of the first magnetic core structure 11 , but there must be an insulating layer / insulating material between adjacent layers of the multi-layer structure obtained by adjacent winding to insulate and separate the adjacent layers.
[0032] In some embodiments, the strip-shaped magnetic conductive material may be any one of nanocrystalline material, silicon steel, and amorphous material, which have high magnetic permeability.
[0033] In some embodiments, the ends of the center column 12 are respectively abutted against the inner wall surface of the first magnetic core structure 11. For example, when the longitudinal cross-section of the first magnetic core structure 11 is rectangular, the center column 12 abuts against two opposite sides of the rectangle. The material of the center column 12 can be nanocrystalline, amorphous, silicon steel, ferrite, magnetic powder core, non-magnetic material, etc.
[0034] In some embodiments, the center column 12 is provided with at least one air gap in its axial direction. Exemplarily, the center column 12 is made of a magnetic powder core, and the magnetic powder core has at least one piece. In other words, the center column 12 includes at least one magnetic powder core. When there are at least two magnetic powder cores, an air gap can be provided between at least one adjacent magnetic powder core to adjust the inductance value. Specifically, the number and / or size of the air gaps can be adjusted based on actual inductance requirements and are not specifically limited in this application.
[0035] Please refer to Figure 2 , Figure 2 This is a schematic diagram of another magnetic structure 10 provided in an embodiment of the present application. Figure 2 As shown, an embodiment of the present application provides another magnetic structure 10, which includes a first magnetic core structure 11, a middle column 12 supported in the first magnetic core structure 11, and a winding wound outside the middle column 12, wherein the first magnetic core structure 11 includes a strip-shaped magnetic conductive material, and the strip-shaped magnetic conductive material is wound in at least one layer, which is specifically the same as the above embodiment and will not be repeated in this part.
[0036] In some embodiments, different from the above embodiments, the magnetic structure 10 in this embodiment also includes a yoke column 13 located in the first magnetic core structure 11, and the middle column 12 includes two sub-segments, wherein the two ends of the yoke column 13 are respectively against the first magnetic core structure 11, and one end of the two sub-segments are respectively against the two sides of the yoke column 13, and the other ends of the two sub-segments are respectively against the first magnetic core structure 11, and a winding is wound around the outer circumference of each sub-segment.
[0037] That is to say, the yoke column 13 in this embodiment divides the middle column 12 into two left and right sub-segments. The yoke column 13 can be a magnetic core obtained by cutting a strip of magnetic conductive material, such as nanocrystals, silicon steel, amorphous materials, etc., or it can be a sintered magnetic material, such as a magnetic powder core or ferrite.
[0038] When the number of the yoke column 13 is one, the constructed magnetic structure 10 is a two-phase magnetic structure 10 .
[0039] In some other embodiments, optionally, the magnetic structure 10 also includes at least two yoke columns 13 located in the first magnetic core structure 11, and the middle column 12 includes a plurality of sub-segments, wherein the number of sub-segments is one more than the number of yoke columns 13, and both ends of each yoke column 13 are respectively abutted against the first magnetic core structure 11, at least two yoke columns 13 are spaced apart in the first direction, and the plurality of sub-segments are arranged in a straight line in a second direction perpendicular to the first direction, a sub-segment is abutted between each two adjacent yoke columns 13, and a sub-segment is abutted between each of the two outermost yoke columns 13 located in the second direction and the first magnetic core structure 11, and the winding is wrapped around the outer circumference of each sub-segment.
[0040] Specifically, at least two yoke columns 13 divide the middle column 12 into a plurality of sub-segments, the plurality of sub-segments are arranged in a line in a direction perpendicular to the yoke columns 13, one sub-segment is arranged between two adjacent yoke columns 13, and one sub-segment is arranged between each of the two side yoke columns 13 and the first magnetic core structure 11. When the number of yoke columns 13 is two, the number of sub-segments is three, and the magnetic structure 10 formed is a three-phase magnetic structure. When the number of yoke columns 13 is three, the number of sub-segments is four, and the magnetic structure 10 formed is a four-phase magnetic structure. Similarly, the magnetic structure is a magnetic integration scheme.
[0041] In some embodiments, each sub-segment is made of a magnetic powder core. When at least one of the sub-segments includes at least two magnetic powder cores, at least one air gap is formed between the adjacent magnetic powder cores to adjust the inductance value. Specifically, the number and / or size of the air gaps can be adjusted according to the actual inductance requirement, which is not limited in the present application.
[0042] In the magnetic structure 10 of the present embodiment, the first magnetic core structure 11 is made of a strip-shaped magnetic conductive material wound at least one layer, which eliminates the step of cutting the strip-shaped magnetic conductive material, reduces the processing cost of cutting and cutting surface treatment, and uses the strip-shaped magnetic conductive material as the first magnetic core structure 11 without causing material waste. In addition, the performance of the magnetic core is not reduced due to the cutting of the strip-shaped magnetic conductive material, and the additional noise caused by the cutting surface is avoided. Furthermore, the magnetic flux can be maximally constrained in the magnetic circuit of each phase to reduce the coupling between the phases. Further, the increase of the yoke columns 13 enables the magnetic structure 10 to form a multi-phase magnetic structure and realize magnetic integration.
[0043] Please refer to Figures 3 to 6 The second embodiment of the present application also provides a magnetic integration structure 20, which includes a second magnetic core structure 21 and at least two magnetic structures 10 as described in the above embodiments. The at least two magnetic structures 10 are arranged in the second magnetic core structure 21, and the second magnetic core structure 21 includes a strip-shaped magnetic conductive material wound at least one layer.
[0044] In the present embodiment, the magnetic integration structure 20 is a magnetic integration structure 20 integrated by at least two phases, and the number of phases is the same as the number of magnetic structures 10 included.
[0045] In the present embodiment, the magnetic structure 10 includes a first magnetic core structure 11, a middle column 12 supported in the first magnetic core structure 11, and a winding wound around the middle column 12. The first magnetic core structure 11 includes a strip-shaped magnetic conductive material wound at least one layer, which is the same as the above embodiments and will not be repeated here.
[0046] In some embodiments, the strip-shaped magnetic conductive material is a high permeability material, and the material is in a strip shape, and the strip-shaped magnetic conductive material is wound at least one layer; for example, the strip-shaped magnetic conductive material is wound on the outside of the magnetic structure 10, and is wound at least one layer, and finally the second magnetic core structure 21 can be in a rectangular, racetrack, ring, or other shape; when the second magnetic core structure 21 is in a rectangular shape, it can be a rectangular shape with a chamfer. When the strip-shaped magnetic conductive material is wound in multiple layers, it is stacked in the thickness direction of the strip-shaped magnetic conductive material. The thickness of the second magnetic core structure 21 can be controlled by controlling the number of layers of the strip-shaped magnetic conductive material. This process does not require additional processing such as cutting and post-cutting processing.
[0047] In some embodiments, the surface of the strip-shaped magnetic conductive material is provided with a plating layer, and the plating layer is an insulating material. When the strip-shaped magnetic conductive material is wound in at least two layers, the plating layer exists between the strip-shaped magnetic conductive materials of adjacent layers, thereby insulating and separating the adjacent layers. In this case, the plating layer can be considered as a plating layer on the strip-shaped magnetic conductive material itself.
[0048] In other embodiments, the second magnetic core structure 21 further includes an insulating layer. When the strip-shaped magnetic conductive material is wound in at least two layers, the insulating layer exists between the strip-shaped magnetic conductive materials of adjacent layers, thereby insulating and separating the adjacent layers. In this case, the insulating layer can be considered as an additional layer during winding.
[0049] The above different insulation connection methods can depend on the manufacturing process of the second magnetic core structure 21, but there must be an insulating layer / insulating material between the adjacent layers of the multi-layer structure obtained by winding to insulate and separate the adjacent layers.
[0050] In some embodiments, the strip-shaped magnetic conductive material can be any one of a nanocrystalline material, a silicon steel, and an amorphous material. These materials have high magnetic permeability.
[0051] As shown in FIG. 1, Figures 3 to 5 In some embodiments, the axes of the columns 12 of the magnetic structures 10 can be arranged in a line. That is, the magnetic structures 10 located in the second magnetic core structure 21 are arranged in a stack in the direction of the axes of the columns 12 of the magnetic structures 10. At this time, the multiple magnetic structures 10 are arranged in a stack in the longitudinal direction, and the second magnetic core structure 21 functions to fix the magnetic structures 10 and balance the magnetic circuit.
[0052] As shown in FIG. 1, Figure 6 In some embodiments, the columns 12 of the magnetic structures 10 can be arranged in a line in a direction perpendicular to the columns 12. That is, the magnetic structures 10 wrapped in the second magnetic core structure 21 are arranged in close contact in a direction perpendicular to the columns 12. At this time, the multiple magnetic structures 10 are arranged in close contact in the lateral direction, and the second magnetic core structure 21 functions to fix the magnetic structures 10 and balance the magnetic circuit.
[0053] In some embodiments, optionally, the number of magnetic structures 10 is three, that is, the number of magnetic structures 10 fixedly integrated in the second magnetic core structure 21 is three. In this case, the constructed magnetic integrated structure 20 is a three-phase seven-column magnetic integrated structure 20, that is, the middle column 12 of the three magnetic structures 10, plus the first magnetic core structure 11 portion between the two adjacent middle columns 12, and the first magnetic core structure 11 portion and the second magnetic core structure 21 portion on both sides.
[0054] In some other embodiments, optionally, the number of magnetic structures 10 is four, that is, the number of magnetic structures 10 fixedly integrated in the second magnetic core structure 21 is four. In this case, the constructed magnetic integrated structure 20 is a four-phase nine-pillar magnetic integrated structure 20, that is, the middle pillars 12 of the four magnetic structures 10, plus the first magnetic core structure 11 portion between the two adjacent middle pillars 12, and the first magnetic core structure 11 portion and the second magnetic core structure 21 portion on both sides.
[0055] Thus, the multi-phase integration of the magnetic structure 10 is achieved, and the volume of the constructed reactor can be reduced. Of course, the second magnetic core structure 21 can also include more magnetic structures 10, thereby achieving multi-phase magnetic integration.
[0056] In some embodiments, the first magnetic core structure 11 and the second magnetic core structure 21 may optionally have the same stacking thickness, thereby ensuring that the magnetic circuit of the constructed magnetic integrated structure 20 is balanced and symmetrical, thereby improving the quality of the magnetic integrated structure 20 .
[0057] In this embodiment, the second core structure also does not require cutting, which has the following advantages: (1) the strip material is retained to the greatest extent during the manufacturing process, thereby saving material costs to the greatest extent possible; (2) the cutting surface is minimized to the greatest extent, thus saving the processing costs of cutting and post-processing of the cutting surface; (3) the cutting surface is minimized to the greatest extent, so the magnetic performance caused by the cutting surface is attenuated, the core loss is increased, and additional hot spots are also effectively limited; (4) the cutting surface is minimized to the greatest extent, and the electromagnetic force generated by the cutting surface and the surrounding area due to different magnetic permeabilities is also effectively limited, reducing additional noise sources.
[0058] In a third aspect, the present application also provides an electrical device, which includes the magnetic structure or magnetic integrated structure as described in the above embodiments. To avoid repetition, they will not be described here.
[0059] In an embodiment of the present application, the first magnetic core structure is made by winding at least one layer of strip-shaped magnetic conductive material, which eliminates the step of cutting the strip-shaped magnetic conductive material, reduces the processing cost of cutting and cutting surface treatment, and does not cause material waste; and avoids the reduction in magnetic core performance caused by cutting the strip-shaped magnetic conductive material and the additional noise caused by the cut surface; in addition, it can also maximize the confinement of the magnetic flux in the magnetic circuit of each phase, reducing the coupling between the phases.
[0060] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.
[0061] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.
Claims
1. A magnetic structure, characterized in that The magnetic structure includes: a first magnetic core structure, a center column supported in the first magnetic core structure, and a winding wound outside the center column. The first magnetic core structure includes a strip-shaped magnetic conductive material, and the strip-shaped magnetic conductive material is wound in at least one layer.
2. The magnetic structure according to claim 1, characterized in that The strip-shaped magnetic conductive material is any one of nanocrystalline material, silicon steel, and amorphous material.
3. The magnetic structure according to claim 1, wherein: The center column is provided with at least one air gap in the axial direction of the center column.
4. The magnetic structure according to claim 1, wherein: The magnetic structure also includes a yoke column located in the first magnetic core structure, and the middle column includes two sub-segments. The two ends of the yoke column are respectively against the first magnetic core structure, one end of the two sub-segments is respectively against the two sides of the yoke column, and the other ends of the two sub-segments are respectively against the first magnetic core structure, and the winding is wrapped around the outer circumference of each sub-segment.
5. The magnetic structure according to claim 1, wherein: The magnetic structure also includes at least two yoke columns located in the first magnetic core structure, the middle column includes a plurality of sub-segments, the number of the sub-segments is one more than the number of the yoke columns, the two ends of each yoke column are respectively against the first magnetic core structure, the at least two yoke columns are spaced apart in the first direction, the plurality of sub-segments are arranged in a straight line in a second direction perpendicular to the first direction, a sub-segment is arranged between every two adjacent yoke columns, and a sub-segment is respectively arranged between the two outermost yoke columns located in the second direction and the first magnetic core structure, and the winding is wrapped around the outer circumference of each sub-segment.
6. A magnetic integrated structure, characterized in that: It comprises a second magnetic core structure and at least two magnetic structures according to any one of claims 1 to 3, wherein the at least two magnetic structures are arranged in the second magnetic core structure, and the second magnetic core structure comprises a strip-shaped magnetic conductive material, and the strip-shaped magnetic conductive material is wound in at least one layer.
7. The magnetic integrated structure according to claim 6, characterized in that: The axes of the central columns of the magnetic structures are collinearly arranged.
8. The magnetic integrated structure according to claim 6, characterized in that: The central columns of the magnetic structures are arranged at intervals in a direction perpendicular to the central columns.
9. The magnetic integrated structure according to claim 6, characterized in that: The number of the magnetic structures is three, and the magnetic integration structure is a three-phase seven-pillar magnetic integration structure; or the number of the magnetic structures is four, and the magnetic integration structure is a four-phase nine-pillar magnetic integration structure.
10. The magnetic integrated structure according to claim 6, characterized in that: The first magnetic core structure and the second magnetic core structure have the same stacking thickness.
11. An electrical device, characterized in that: The invention comprises the magnetic integrated structure as claimed in any one of claims 6 to 10.