Combined magnetic core and combined inductor

Abstract

The embodiment of the utility model discloses a combined magnetic core and a combined inductor. The combined magnetic core comprises an upper yoke, a lower yoke, a first core column and a second core column, wherein the upper yoke and the lower yoke are arranged along a first direction; the first core column and the second core column are arranged along a second direction; the second direction is perpendicular to the first direction; the first core column is located between the upper yoke and the lower yoke and is perpendicular to the upper yoke and the lower yoke, and the second core column is located between the upper yoke and the lower yoke and is perpendicular to the upper yoke and the lower yoke; each of the first core column and the second core column comprises at least three magnetic cores, and at least four salient points are arranged on the section of each of the first core column and the second core column. According to the utility model, an air gap sheet is omitted, so that the cost is low; an air gap piece is omitted, the assembling efficiency is not affected, the production and machining speed is increased, the manufacturing action is reduced, and therefore automatic production is achieved; and by using the salient point adhesive, the bonding stability can be enhanced.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of electronic component manufacturing, and in particular to a utility model name. Background Art

[0002] The combined inductor is an electronic component consisting of a combined magnetic core and a coil. Its advantages mainly include the following points: the block magnetic core can be combined flexibly, and various suitable inductors of various dimensions can be designed according to the installation location and space conditions; the combined magnetic core allows the coil to be wound separately, and finally the magnetic core, coil and insulation parts are assembled, which is suitable for automated production; the combined magnetic core allows an air gap to be added to the magnetic circuit, which is convenient for adjusting the softness and hardness of the DC bias of the inductor; the stray capacitance of the vertically wound coil is small, which can significantly reduce the current oscillation at the switching moment, thereby reducing the current stress of the switching device; the vertically wound coil has good heat dissipation characteristics, which can improve the power density of the product.

[0003] The air gap of a combined inductor refers to a part of the magnetic circuit that is composed of air, which is called an air gap, or simply an air gap. Its main functions include reducing magnetic permeability, increasing saturation current, increasing the ability to store energy, and reducing residual magnetism. The size of the combined inductor air gap has the following effects on its performance: Inductance value: Generally speaking, the inductance value decreases as the air gap increases. DC bias characteristics: affects the performance of the inductor under DC current. Saturation current: The larger the air gap, the higher the saturation current is usually. Core loss: may increase. Frequency characteristics: affects the performance within a specific frequency range. Electromagnetic interference (EMI): The size of the air gap may affect the ability to suppress EMI. These influencing factors are interrelated. When designing and using a combined inductor, it is necessary to select the appropriate air gap size based on specific application requirements.

[0004] The existing composite magnetic core mainly improves performance by adding air gaps, but there are defects: first, the cost of air gaps is high; second, air gaps affect assembly efficiency, slow down production and processing, and increase manufacturing operations; third, air gaps are not easy to glue. Ultimately, it is a cost issue. Utility Model Content

[0005] The utility model provides a combined magnetic core and a combined inductor, which eliminates an air gap sheet and has a low cost; eliminating the air gap sheet does not affect the assembly efficiency, improves the production and processing speed, reduces the manufacturing actions, and thus realizes automated production; and using convex points and good adhesive can also enhance the bonding stability.

[0006] According to one aspect of the utility model, a combined magnetic core is provided, the combined magnetic core comprising: an upper yoke and a lower yoke arranged along a first direction, a first core column and a second core column arranged along a second direction, wherein the second direction is perpendicular to the first direction;

[0007] The first core column is located between the upper yoke and the lower yoke and is perpendicular to the upper yoke and the lower yoke, and the second core column is located between the upper yoke and the lower yoke and is perpendicular to the upper yoke and the lower yoke;

[0008] The first core column and the second core column each include at least three magnetic cores, and at least four protrusions are arranged on the cross section of the first core column and the second core column.

[0009] Optionally, the combined magnetic core further includes a third core column, wherein the first core column, the second core column and the third core column are arranged side by side and equally spaced between the upper yoke and the lower yoke, and the third core column is perpendicular to the upper yoke and the lower yoke;

[0010] The third core column includes at least three magnetic cores, and at least four protrusions are arranged on the cross section of the third core column.

[0011] Optionally, the protrusions are distributed in a ring shape and correspond to the air gap of the magnetic core.

[0012] Optionally, glue dots are provided on the protrusions, and the glue dots are used for pasting and assembling the magnetic core.

[0013] Optionally, the protrusions are integrally formed with the magnetic core.

[0014] Optionally, the protrusion has the same shape as the magnetic core.

[0015] Optionally, the thickness of the protrusion is 0.5 mm.

[0016] Optionally, the diameter of the protrusions is 4 mm-6 mm.

[0017] Optionally, the center distance between adjacent protrusions is 15mm-17mm.

[0018] According to another aspect of the present invention, a combined inductor is provided. The combined inductor includes any one of the combined magnetic cores described in the above aspect.

[0019] The technical solution of the embodiment of the utility model is to add convex points to the magnetic core in the combined magnetic core, and use the convex points to play the role of opening an air gap for the combined magnetic core. Compared with the prior art, the air gap sheet is eliminated, and the cost is lower; the elimination of the air gap sheet does not affect the assembly efficiency, improves the production and processing speed, reduces the manufacturing actions, and thus realizes automated production; the use of convex points is good for adhesion, and the bonding stability can also be enhanced. In summary, the utility model solves the problems of high manufacturing cost, low assembly efficiency and poor adhesion of the existing combined magnetic core, and also solves the problem of needing to add air gap sheets to adjust the performance during the manufacturing process.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a top view of a combined magnetic core provided according to an embodiment of the utility model;

[0023] Figure 2 It is a front view of a combined magnetic core provided according to an embodiment of the utility model;

[0024] Figure 3 It is a left side view of a combined magnetic core provided according to an embodiment of the utility model;

[0025] Figure 4 is a top view of another combined magnetic core provided according to an embodiment of the utility model;

[0026] Figure 5 It is a front view of another combined magnetic core provided according to an embodiment of the utility model;

[0027] Figure 6 It is a schematic diagram of a 3D structure of a single magnetic core provided according to an embodiment of the utility model;

[0028] Figure 7 It is a schematic diagram of the front dimensions of a combined magnetic core provided according to an embodiment of the utility model;

[0029] Figure 8 It is a schematic diagram of the top dimensions of a combined magnetic core provided according to an embodiment of the utility model;

[0030] Fig. 9 It is a schematic diagram of a 3D structure of a combined magnetic core provided according to an embodiment of the utility model;

[0031] Fig.10 It is a schematic diagram of the front dimensions of another combined magnetic core provided according to an embodiment of the utility model;

[0032] Fig.11 It is a schematic diagram of the top dimensions of another combined magnetic core provided according to an embodiment of the utility model;

[0033] Fig.12 It is a schematic diagram of the 3D structure of another combined magnetic core provided according to an embodiment of the utility model. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] Figure 1 is a top view of a combined magnetic core provided according to an embodiment of the utility model, Figure 2 This is a front view of a combined magnetic core provided according to an embodiment of the utility model. Figure 3 is a left view of a combined magnetic core provided according to an embodiment of the utility model, referring to Figure 1 , Figure 2 and Figure 3 The embodiment of the utility model provides a combined magnetic core, which includes: an upper yoke 10 and a lower yoke 20 arranged along a first direction X, a first core column 30 and a second core column 40 arranged along a second direction Y, and the second direction Y is perpendicular to the first direction X; the first core column 30 is located between the upper yoke 10 and the lower yoke 20 and is perpendicular to the upper yoke 10 and the lower yoke 20, and the second core column 40 is located between the upper yoke 10 and the lower yoke 20 and is perpendicular to the upper yoke 10 and the lower yoke 20; the first core column 30 and the second core column 40 each include at least three magnetic cores 341, and at least four protrusions 342 are arranged on the cross-section of the first core column 30 and the second core column 40.

[0037] Specifically, the combined magnetic core includes an upper yoke 10 and a lower yoke 20 which are parallel to each other, and two parallel first core columns 30 and second core columns 40. The first core column 30 and the second core column 40 are located between the upper yoke 10 and the lower yoke 20 and at both ends. The first core column 30 and the second core column 40 can be respectively formed by bonding three magnetic cores 341. The cross section of the first core column 30 and the second core column 40 can have four protrusions 342.

[0038] The material of the combined magnetic core is a common material of alloy in powder metallurgy, including but not limited to iron silicon, iron silicon aluminum, iron nickel, iron silicon chromium and the like. The material of the protrusion 342 is consistent with that of the main body of the magnetic core 341. The protrusion 342 is added during the pressing process of the magnetic core 341. The protrusion 342 is directly added to the mold design during the production process of the magnetic core 341, and is formed once during the pressing, not added later. The height of the protrusion 342 in the combined magnetic core is consistent with the thickness of the air gap sheet that needs to be added to the existing combined magnetic core.

[0039] The technical solution of the embodiment of the utility model is to add convex points to the magnetic core in the combined magnetic core, and use the convex points to play the role of opening an air gap for the combined magnetic core. Compared with the prior art, the air gap sheet is eliminated, and the cost is lower; the elimination of the air gap sheet does not affect the assembly efficiency, improves the production and processing speed, reduces the manufacturing actions, and thus realizes automated production; the use of convex points is good for adhesion, and the bonding stability can also be enhanced. In summary, the utility model solves the problems of high manufacturing cost, low assembly efficiency and poor adhesion of the existing combined magnetic core, and also solves the problem of needing to add air gap sheets to adjust the performance during the manufacturing process.

[0040] Figure 4 is a top view of another combined magnetic core provided according to an embodiment of the utility model, Figure 5 is a front view of another combined magnetic core provided according to an embodiment of the utility model, referring to Figure 4 and Figure 5 Optionally, the composite magnetic core also includes a third core column 50, and the first core column 30, the second core column 40 and the third core column 50 are arranged side by side and evenly spaced between the upper yoke 10 and the lower yoke 20, and the third core column 50 is perpendicular to the upper yoke 10 and the lower yoke 20; the third core column 50 includes at least 3 magnetic cores 341, and at least 4 protrusions 342 are arranged on the cross section of the third core column 50.

[0041] Specifically, the combined magnetic core includes an upper yoke 10 and a lower yoke 20 which are parallel to each other, and three parallel first core columns 30, second core columns 40, and third core columns 50. The first core column 30, the second core column 40, and the third core column 50 are respectively a left core column, a middle core column, and a right core column, which are arranged vertically between the upper yoke 10 and the lower yoke 20 in parallel and at equal intervals. The left core column, the middle core column, and the right core column can be respectively formed by bonding three magnetic cores 341, and the cross section of the third core column 50 can have four protrusions 342.

[0042] Figure 6 is a schematic diagram of a 3D structure of a single magnetic core provided according to an embodiment of the utility model, with reference to Figure 6 Optionally, the protrusions 342 are distributed in a ring shape and correspond to the air gap of the magnetic core 341 .

[0043] Specifically, a protrusion 342 is designed at the air gap of the combined magnetic core, and the height of the protrusion 342 is the same as the thickness of the air gap required in the design.

[0044] Continue to refer Figure 6 Optionally, glue is disposed on the protrusions 342 , and the glue is used for pasting and assembling the magnetic core 341 .

[0045] Specifically, the bumps 342 are glued and can be assembled according to design requirements. The bumps 342 are glued to make them cohesive and can be glued and assembled with another magnetic core. The magnetic cores are combined with each other according to design requirements to form an inductor with certain performance.

[0046] Continue to refer Figure 6 Optionally, the protrusion 342 and the magnetic core 341 are integrally formed.

[0047] Specifically, the convex point 342 and the magnetic core 341 are integrally formed by mold pressing, and the material of the convex point 342 is generally consistent with the material of the magnetic core 341.

[0048] Continue to refer Figure 6 Optionally, the bump 342 has the same shape as the magnetic core 341 .

[0049] Specifically, the shape and size of the protrusion 342 should match the size of the magnetic core 341 and be able to bear the weight of the magnetic core 341. The shape and area of ​​the protrusion 342 are related to the main body of the magnetic core 341, mainly suitable for the main body of the magnetic core 341, and can play a supporting role.

[0050] Continue to refer Figure 6 Optionally, the thickness of the bump 342 is 0.5 mm.

[0051] Specifically, the height of the protrusion 342 in the combined magnetic core is consistent with the thickness of the air gap sheet that needs to be added to the existing combined magnetic core.

[0052] Figure 7 : is a schematic diagram of the front dimensions of a combined magnetic core provided according to an embodiment of the utility model, Figure 8 Schematic diagram of the top dimensions of a combined magnetic core provided according to an embodiment of the utility model. Fig. 9 is a 3D structural schematic diagram of a combined magnetic core provided according to an embodiment of the utility model, Fig.10 2 is a schematic diagram of the front dimensions of another combined magnetic core provided according to an embodiment of the utility model. Fig.11 1 is a schematic diagram of the top dimensions of another combined magnetic core provided according to an embodiment of the utility model. Fig.12 is a schematic diagram of a 3D structure of another combined magnetic core provided according to an embodiment of the utility model, referring to Figure 7-Figure 12 Optionally, the diameter of the protrusion 342 is 4 mm to 6 mm. Optionally, the center distance between adjacent protrusions 342 is 15 mm to 17 mm.

[0053] An embodiment of the utility model further provides a combined inductor, which comprises the combined magnetic core provided by any embodiment of the utility model.

[0054] Specifically, the combined magnetic cores are combined with each other according to the design requirements to form a combined inductor with certain performance, and the combined inductor is composed of multiple combined magnetic cores. The material of the combined magnetic core is a common material of alloy in powder metallurgy, including but not limited to iron silicon, iron silicon aluminum, iron nickel, iron silicon chromium and other materials.

[0055] Since the combined inductor includes the combined magnetic core provided by any embodiment of the present invention, the combined inductor has the same beneficial effects as the combined magnetic core, which will not be described in detail herein.

[0056] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A combined magnetic core, characterized in that: include: An upper yoke and a lower yoke are arranged along a first direction, and a first core column and a second core column are arranged along a second direction, wherein the second direction is perpendicular to the first direction; The first core column is located between the upper yoke and the lower yoke and is perpendicular to the upper yoke and the lower yoke, and the second core column is located between the upper yoke and the lower yoke and is perpendicular to the upper yoke and the lower yoke; The first core column and the second core column each include at least three magnetic cores, and at least four protrusions are arranged on the cross section of the first core column and the second core column.

2. The combined magnetic core according to claim 1, characterized in that: It also includes a third core column, wherein the first core column, the second core column and the third core column are arranged side by side and equally spaced between the upper yoke and the lower yoke, and the third core column is perpendicular to the upper yoke and the lower yoke; The third core column includes at least three magnetic cores, and at least four protrusions are arranged on the cross section of the third core column.

3. The combined magnetic core according to claim 1, characterized in that: The protrusions are distributed in an annular shape and correspond to the air gap of the magnetic core.

4. The combined magnetic core according to claim 1, characterized in that: Glue is disposed on the protrusions, and the glue is used for pasting and assembling the magnetic core.

5. The combined magnetic core according to claim 1, characterized in that: The protrusions are integrally formed with the magnetic core.

6. The combined magnetic core according to claim 1, characterized in that: The protrusion has the same shape as the magnetic core.

7. The combined magnetic core according to claim 1, characterized in that: The thickness of the protrusions is comprised between 0.5 mm and 0.5 mm.

8. The combined magnetic core according to claim 1, characterized in that: The diameter of the protrusions is comprised between 4 mm and 6 mm.

9. The combined magnetic core according to claim 1, characterized in that: The center distance between adjacent protrusions is 15mm-17mm.

10. A combined inductor, characterized in that: The invention comprises the combined magnetic core as described in any one of claims 1 to 9.

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