Nanocrystalline ribbon magnetic core and inductor
By designing a symmetrically shaped nanocrystalline ribbon core assembly and shell packaging, the gap problem between the nanocrystalline ribbon core and the coil is solved, and the space utilization and power density of the inductor are improved.
Patent Information
- Application Number
- CN202422913793.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-28
AI Technical Summary
There are large gaps between the four sides of the nanocrystalline ribbon core and the coil, resulting in space waste and reduced inductor power density.
A nanocrystalline ribbon magnetic core is designed. The cross-section of the magnetic core component is symmetrical in the width and length directions, and the size gradually decreases from the middle to the two sides. A centrally symmetrical shape is formed by stacking multiple nanocrystalline ribbon magnetic core units to reduce the gap between the core and the coil. The core is encapsulated in a shell to improve space utilization.
By optimizing the core structure and packaging design, the gap between the core and the coil is reduced, and the space utilization and power density of the inductor are improved.
Smart Images
Figure CN223427336U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic equipment, in particular to a nanocrystalline ribbon magnetic core and an inductor. Background Art
[0002] With the continuous advancement of electronic technology, inductors are increasingly used in electronic devices. Nanocrystalline ribbons, due to their high magnetic permeability, low loss, and other excellent properties, are ideal materials for inductor magnets. However, since nanocrystalline ribbons are rectangular, sheet-like structures, and magnets are made by winding nanocrystalline ribbons in a circumferential direction, the longitudinal cross-section of the magnet is annular, while the cross-section in the circumferential direction is always rectangular. This creates a large gap between the four sides of the core's cross-section and the coil when the coil is wound around the core, resulting in wasted space and reduced power density. Utility Model Content
[0003] The utility model provides a nanocrystalline ribbon magnetic core and an inductor, which are used to solve the problem in the prior art that there are large gaps between the four sides of the nanocrystalline ribbon magnetic core of the inductor and the coil, resulting in space waste and reduced power density of the inductor.
[0004] The utility model provides a nanocrystalline ribbon magnetic core, comprising:
[0005] A magnetic core assembly comprises a plurality of nanocrystalline ribbon magnetic core units stacked in sequence; the cross section of the magnetic core assembly is symmetrically arranged in the width direction, and the size in the width direction gradually decreases from the middle to both sides; the cross section of the magnetic core assembly is symmetrically arranged in the length direction, and the size in the length direction gradually decreases from the middle to both sides; wherein one of the length direction and the width direction is consistent with the stacking direction of the plurality of nanocrystalline ribbon magnetic core units.
[0006] According to the nanocrystalline ribbon magnetic core provided by the present invention, the size of each of the nanocrystalline ribbon magnetic core units in the stacking direction is the same.
[0007] According to the nanocrystalline ribbon magnetic core provided by the present invention, the cross section of the magnetic core component is a centrosymmetrical shape.
[0008] According to a nanocrystalline ribbon magnetic core provided by the present invention, the magnetic core assembly includes a first nanocrystalline ribbon magnetic core unit and two second nanocrystalline ribbon magnetic core units, and the two second nanocrystalline ribbon magnetic core units are respectively arranged on both sides of the first nanocrystalline ribbon magnetic core unit.
[0009] According to a nanocrystalline ribbon magnetic core provided by the present invention, the number of the first nanocrystalline ribbon magnetic core units is two, and the two first nanocrystalline ribbon magnetic core units are stacked between the two second nanocrystalline ribbon magnetic core units; the first nanocrystalline ribbon magnetic core unit and the second nanocrystalline ribbon magnetic core unit have the same size in the stacking direction, the size of the second nanocrystalline ribbon magnetic core unit perpendicular to the stacking direction is twice the size in the stacking direction, and the size of the first nanocrystalline ribbon magnetic core unit in the width direction is four times the size in the length direction.
[0010] According to the nanocrystalline ribbon magnetic core provided by the present invention, adjacent nanocrystalline ribbon magnetic core units are glued and connected.
[0011] According to the utility model, a nanocrystalline ribbon magnetic core is provided, which also includes:
[0012] The shell includes a first shell and a second shell. The first shell and the second shell are buckled together to form an accommodating space. The magnetic core component is accommodated in the accommodating space. The shape of the shell is adapted to the outer contour of the magnetic core component.
[0013] According to a nanocrystalline ribbon magnetic core provided by the present invention, stepped grooves are provided on the inner sides of the first shell and the second shell, and the stepped grooves are adapted to the multiple nanocrystalline ribbon magnetic core units stacked.
[0014] According to the nanocrystalline ribbon magnetic core provided by the present invention, the outer shape of the shell is a regular hexagon.
[0015] The utility model also provides an inductor, comprising: a coil and any one of the above-mentioned nanocrystalline ribbon magnetic cores, wherein the coil is wound around the outside of the nanocrystalline ribbon magnetic core.
[0016] The nanocrystalline ribbon core and inductor provided by this utility model are formed by stacking multiple nanocrystalline ribbon core units to form a core assembly. The cross-section of the core assembly is symmetrical in width, with the width dimension gradually decreasing from the center to the sides. The cross-section of the core assembly is also symmetrical in length, with the length dimension gradually decreasing from the center to the sides. Compared with traditional magnetic cores with rectangular cross-sections, the nanocrystalline ribbon core of this embodiment reduces the gap between it and the coil, improving space utilization and thereby increasing the power density of the inductor. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 It is a cross-sectional view of the inductor provided by the utility model.
[0019] Figure 2 It is a structural schematic diagram of the inductor provided by the utility model.
[0020] Figure 3 yes Figure 2 A cross-sectional view of the inductor in the AA direction.
[0021] Figure 4 This is a schematic diagram of the shell structure of the nanocrystalline ribbon magnetic core provided by the utility model.
[0022] Reference numerals:
[0023] 1. Magnetic core assembly; 10. Nanocrystalline ribbon magnetic core unit; 11. First nanocrystalline ribbon magnetic core unit; 12. Second nanocrystalline ribbon magnetic core unit; 2. Shell; 21. First shell; 211. First annular groove; 212. Second annular groove; 22. Second shell; 3. Coil. DETAILED DESCRIPTION
[0024] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "first" and "second" are for the purpose of clearly describing the numbering of product components and do not represent any substantial difference. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances. In addition, the meaning of "multiple" is two or more.
[0026] The application is described below Figures 1-4 The nanocrystalline strip core and the inductor are described.
[0027] As Figure 1 shown, the nanocrystalline strip core provided by the embodiment of the application comprises a core assembly 1, and the core assembly 1 comprises a plurality of nanocrystalline strip core units 10 which are sequentially stacked. The cross section of the core assembly 1 is symmetrically arranged in the width direction, and the size thereof gradually decreases from the middle to both sides in the width direction. The cross section of the core assembly 1 is symmetrically arranged in the length direction, and the size thereof gradually decreases from the middle to both sides in the length direction. One of the length direction and the width direction is consistent with the stacking direction of the plurality of nanocrystalline strip core units 10.
[0028] The nanocrystalline strip core unit 10 is formed by winding the rectangular sheet-shaped nanocrystalline strip in the circumferential direction. The cross section of the nanocrystalline strip core unit 10 and the cross section of the core assembly 1 both refer to the cross section perpendicular to the circumferential direction. For the convenience of describing the structure of the nanocrystalline strip core, the cross section at the position shown in Figure 1 is taken as an example, the length direction of the cross section is defined as the Z direction in the figure, and the width direction of the cross section is defined as the Y direction in the figure.
[0029] Figure 1 The stacking direction of the plurality of nanocrystalline strip core units 10 is consistent with the length direction (Z direction) of the cross section of the core assembly 1. Of course, the stacking direction of the plurality of nanocrystalline strip core units 10 can also be consistent with the width direction (Y direction), that is, the plurality of nanocrystalline strip core units 10 are stacked from inside to outside, which is equivalent to that the plurality of nanocrystalline strip core units 10 are sequentially and concentrically stacked.
[0030] The cross section of each nanocrystalline strip core unit 10 is rectangular, as Figure 1 shown, the cross section of the core assembly 1 as a whole is formed by a plurality of rectangles which are stacked. No matter whether the length direction or the width direction of the cross section of the core assembly 1 is consistent with the stacking direction of the plurality of nanocrystalline strip core units 10, as long as the cross section of the core assembly 1 is symmetrically arranged in the width direction (Y direction), and the size thereof gradually decreases from the middle to both sides in the width direction, and the cross section of the core assembly 1 is symmetrically arranged in the length direction (Z direction), and the size thereof gradually decreases from the middle to both sides in the length direction. The part which gradually decreases from the middle to both sides in the width direction and the part which gradually decreases from the middle to both sides in the length direction can fill the gap between the four sides of the original rectangular magnet and the coil.
[0031] The nanocrystalline ribbon core provided in this embodiment of the utility model is formed by stacking multiple nanocrystalline ribbon core units 10 to form a core assembly 1. The cross-section of the core assembly 1 is symmetrical in width, with the width dimension gradually decreasing from the center to the sides. The cross-section of the core assembly 1 is also symmetrical in length, with the length dimension gradually decreasing from the center to the sides. Compared with traditional magnetic cores with rectangular cross-sections, the nanocrystalline ribbon core of this embodiment reduces the gap between the core and the coil, improving space utilization and thereby increasing the power density of the inductor.
[0032] Optionally, each nanocrystalline ribbon core unit 10 has the same size in the stacking direction. In this way, each nanocrystalline ribbon core unit 10 can be wound from nanocrystalline ribbons of the same specifications, achieving consistency in the raw materials of the core.
[0033] In the embodiment of the present invention, the cross section of the magnetic core component 1 is a centrosymmetrical shape. In this way, the cross section of the magnetic core component 1 can be made closer to a circle, which can more effectively utilize the gaps between the four sides of the magnetic core component 1 and the coil, further improving space utilization.
[0034] If the manufacturing process permits, the cross-section of the core component 1 can be made as close to a circle as possible by reducing the size of the nanocrystalline ribbon core unit 10 in the stacking direction and increasing the number of nanocrystalline ribbon core units 10, so as to make full use of the gap between the four sides of the core component 1 and the coil and maximize the space utilization.
[0035] In the embodiment of the present invention, the magnetic core assembly 1 includes a first nanocrystalline ribbon magnetic core unit 11 and two second nanocrystalline ribbon magnetic core units 12 . The two second nanocrystalline ribbon magnetic core units 12 are respectively arranged on both sides of the first nanocrystalline ribbon magnetic core unit 11 .
[0036] In some embodiments, the size of the first nanocrystalline ribbon core unit 11 in the stacking direction is the same as the size of the second nanocrystalline ribbon core unit 12 in the direction perpendicular to the stacking direction, and the size of the first nanocrystalline ribbon core unit 11 in the direction perpendicular to the stacking direction is equal to the sum of the size of the second nanocrystalline ribbon core unit 12 in the direction perpendicular to the stacking direction and twice the size in the stacking direction.
[0037] Specifically, the second nanocrystalline ribbon core unit 12 has a dimension a in the stacking direction and b in the direction perpendicular to the stacking direction. The first nanocrystalline ribbon core unit 11 has a dimension b in the stacking direction and b + 2a in the direction perpendicular to the stacking direction. Thus, one first nanocrystalline ribbon core unit 11 and two second nanocrystalline ribbon core units 12 form a core assembly 1 with a centrosymmetrical cross-section.
[0038] Furthermore, the dimension of the first nanocrystalline ribbon core unit 11 in the stacking direction is twice the dimension of the second nanocrystalline ribbon core unit 12 in the stacking direction, i.e., b equals 2a. In other words, the width of the nanocrystalline ribbon used to wind the first nanocrystalline ribbon core unit 11 is twice the width of the nanocrystalline ribbon used to wind the second nanocrystalline ribbon core unit 12. This allows for improved space utilization by stacking fewer nanocrystalline ribbon core units.
[0039] In other embodiments, Figure 3 As shown, there are two first nanocrystalline ribbon core units 11, and the two first nanocrystalline ribbon core units 11 are stacked between two second nanocrystalline ribbon core units 12. The first nanocrystalline ribbon core units 11 and the second nanocrystalline ribbon core units 12 have the same size in the stacking direction, the size of the second nanocrystalline ribbon core unit 12 perpendicular to the stacking direction is twice the size in the stacking direction, and the size of the first nanocrystalline ribbon core unit 11 perpendicular to the stacking direction is four times the size in the stacking direction.
[0040] Specifically, the second nanocrystalline ribbon core unit 12 has a dimension a in the stacking direction and b in the direction perpendicular to the stacking direction. The first nanocrystalline ribbon core unit 11 has a dimension b in the stacking direction and b+2a in the direction perpendicular to the stacking direction, where b is equal to 2a. In this way, the two first nanocrystalline ribbon core units 11 and the two second nanocrystalline ribbon core units 12 form a core assembly 1 having a cross-shaped cross-section with a centrally symmetrical outer contour. The first nanocrystalline ribbon core unit 11 and the second nanocrystalline ribbon core unit 12 in this embodiment can be wound from nanocrystalline ribbons of the same specifications, which facilitates the production of the core assembly 1.
[0041] In some embodiments of the present invention, adjacent nanocrystalline ribbon core units are glued together. Two adjacent nanocrystalline ribbon core units can be glued together by applying glue on the contact surface, thereby preventing the multi-layer nanocrystalline ribbon core units from slipping when winding the coil.
[0042] like Figure 1 As shown, the nanocrystalline ribbon magnetic core provided by the embodiment of the present invention further includes a shell 2. Figure 4 As shown, the housing 2 includes a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fastened together to form a receiving space, and the magnetic core assembly 1 is received in the receiving space. The outer shape of the housing 2 is adapted to the outer contour of the magnetic core assembly 1.
[0043] Specifically, the housing 2 is an annular hollow cavity structure. Accordingly, the first housing 21 and the second housing 22 are both annular housings with one side open. The opening of the first housing 21 and the opening of the second housing 22 engage with each other to encapsulate the magnetic core assembly 1. The housing 2 protects the magnetic core assembly 1 and consolidates the multiple nanocrystalline ribbon core units 10 into a single unit, facilitating subsequent coil winding.
[0044] Optionally, the shape of the shell 2 is adapted to the outer contour of the magnetic core assembly 1, which means that the shape of the shell 2 is the same as the outer contour of the magnetic core assembly 1. For example, if the cross section of the magnetic core assembly 1 is a centrosymmetrical cross, then the cross section of the shell 2 is also a centrosymmetrical cross.
[0045] Optionally, the outer shape of the housing 2 is adapted to the outer contour of the magnetic core assembly 1, meaning that the four corners of the cross section of the housing 2 are chamfered or rounded to correspond to the four corners of the cross section of the magnetic core assembly 1. This reduces the gap between the four corners of the cross section of the housing 2 and the circular inner cavity formed by the coil, allowing the housing 2 to provide better support for the coil.
[0046] The first shell 21 and the second shell 22 can be connected by snapping. Optionally, the shell 2 is a plastic shell. For example, the shell 2 is made of polybutylene terephthalate (PBT).
[0047] Furthermore, if Figure 4 As shown, the inner sides of the first shell 21 and the second shell 22 are both provided with stepped grooves, which are adapted to the multiple nanocrystalline ribbon magnetic core units stacked.
[0048] It is understood that the inner wall of the cavity of the shell 2 is adapted to the outer shape of the magnetic core assembly 1. Multiple nanocrystalline ribbon core units are stacked to form a stepped structure, which is conformally designed with the stepped grooves. In this way, the relative positions of the multiple nanocrystalline ribbon core units can be restricted by the shell 2.
[0049] For example, a magnetic core assembly 1 includes two first nanocrystalline ribbon core units 11 and two second nanocrystalline ribbon core units 12. The inner side surface of the first shell 21 is recessed with a first annular groove 211 and a second annular groove 212. The second annular groove 212 is located at the bottom of the first annular groove 211, forming a stepped groove for the first shell 21. The inner side surface of the second shell 22 is recessed with a third annular groove and a fourth annular groove. The fourth annular groove is located at the bottom of the third annular groove, forming a stepped groove for the second shell 22. The stepped grooves of the first and second shells 21, 22 are identical.
[0050] When assembling the magnetic core assembly 1 with the housing 2, one of the second nanocrystalline ribbon core units 12 is placed in the second annular groove 212 of the first housing 21, and the other second nanocrystalline ribbon core unit 12 is placed in the first annular groove 211 of the first housing 21. One of the first nanocrystalline ribbon core units 11 is placed in the fourth annular groove of the second housing 22, and the other first nanocrystalline ribbon core unit 11 is placed in the third annular groove of the second housing 22. After the first housing 21 and the second housing 22 are fastened together, the two first nanocrystalline ribbon core units 11 are in close contact.
[0051] In one specific embodiment, the cross-section of the housing 2 is a regular hexagon. Accordingly, the cross-section of the magnetic core assembly 1 is a centrosymmetrical cross. Furthermore, the second nanocrystalline ribbon core unit 12 has a dimension a in the stacking direction and a dimension b perpendicular to the stacking direction. The first nanocrystalline ribbon core unit 11 has a dimension b in the stacking direction and a dimension b+2a perpendicular to the stacking direction, where b equals 2a.
[0052] An embodiment of the present invention further provides an inductor, which includes a coil 3 and the nanocrystalline ribbon magnetic core described in any of the above embodiments, wherein the coil 3 is wound around the outside of the nanocrystalline ribbon magnetic core.
[0053] Specifically, if Figure 2 As shown, the nanocrystalline ribbon magnetic core is an annular structure, and coils 3 are respectively wound on two opposite straight sections of the annular structure.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A nanocrystalline ribbon magnetic core, characterized in that: include: A magnetic core assembly comprises a plurality of nanocrystalline ribbon magnetic core units stacked in sequence; the cross section of the magnetic core assembly is symmetrically arranged in the width direction, and the size in the width direction gradually decreases from the middle to both sides; the cross section of the magnetic core assembly is symmetrically arranged in the length direction, and the size in the length direction gradually decreases from the middle to both sides; wherein one of the length direction and the width direction is consistent with the stacking direction of the plurality of nanocrystalline ribbon magnetic core units.
2. The nanocrystalline ribbon magnetic core according to claim 1, characterized in that: Each of the nanocrystalline ribbon core units has the same size in the stacking direction.
3. The nanocrystalline ribbon magnetic core according to claim 1, characterized in that: The cross section of the magnetic core component is a centrally symmetrical shape.
4. The nanocrystalline ribbon magnetic core according to claim 3, characterized in that: The magnetic core assembly includes a first nanocrystalline ribbon magnetic core unit and two second nanocrystalline ribbon magnetic core units, and the two second nanocrystalline ribbon magnetic core units are respectively arranged on both sides of the first nanocrystalline ribbon magnetic core unit.
5. The nanocrystalline ribbon magnetic core according to claim 4, characterized in that: The number of the first nanocrystalline ribbon magnetic core units is two, and the two first nanocrystalline ribbon magnetic core units are stacked between the two second nanocrystalline ribbon magnetic core units; The first nanocrystalline ribbon magnetic core unit and the second nanocrystalline ribbon magnetic core unit have the same size in the stacking direction, the size of the second nanocrystalline ribbon magnetic core unit perpendicular to the stacking direction is twice the size in the stacking direction, and the size of the first nanocrystalline ribbon magnetic core unit in the width direction is four times the size in the length direction.
6. The nanocrystalline ribbon magnetic core according to claim 1, characterized in that: Adjacent nanocrystalline ribbon magnetic core units are connected by adhesive bonding.
7. The nanocrystalline ribbon magnetic core according to claim 1, characterized in that: Also includes: The shell includes a first shell and a second shell. The first shell and the second shell are buckled together to form an accommodating space. The magnetic core component is accommodated in the accommodating space. The shape of the shell is adapted to the outer contour of the magnetic core component.
8. The nanocrystalline ribbon magnetic core according to claim 7, characterized in that: The inner sides of the first shell and the second shell are both provided with stepped grooves, and the stepped grooves are adapted to the multiple nanocrystalline ribbon magnetic core units stacked.
9. The nanocrystalline ribbon magnetic core according to claim 7, characterized in that: The outer shape of the shell is a regular hexagon.
10. An inductor, characterized in that: include: A coil and a nanocrystalline ribbon magnetic core according to any one of claims 1 to 9, wherein the coil is wound around the outside of the nanocrystalline ribbon magnetic core.