Integrated inductor and integrated inductor equipment
By integrating the inductor structure, utilizing the design of the magnetic core and windings, sharing the magnetic yoke, and optimizing the magnetic permeability, the problem of high cost in reducing the size and weight of magnetic devices in existing technologies has been solved, achieving low-cost miniaturization of magnetic components.
Patent Information
- Application Number
- CN202520469564.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Existing technologies require complex electrical and structural designs to reduce the size and weight of magnetic devices, resulting in high costs.
An integrated inductor structure, including a magnetic core and windings, is adopted. By making the permeability of the top post, bottom post and yoke the same, and windings are wound on the top post, bottom post or side post of each rectangle, sharing a single yoke, the total magnetic reluctance of the magnetic circuit is reduced, thereby reducing the size and weight of the magnetic components.
The size and weight of magnetic components were reduced at a lower cost, and magnetic resistance was further reduced through magnetic circuit optimization, resulting in even smaller size and weight.
Smart Images
Figure CN223898148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inductor technology, and in particular to an integrated inductor and an integrated inductor device. Background Technology
[0002] With the rapid development of the electronics industry, various electronic devices are emerging in an endless stream. Magnetic components are widely used in electronic devices, especially in high-power electronic devices, where they play a crucial role in power conversion. However, magnetic components are generally large and heavy, which is not conducive to the miniaturization trend of electronic devices.
[0003] Currently, in order to reduce the size and weight of magnetic components, existing technologies can achieve this by planning from a system perspective, increasing the operating frequency of the magnetic components, or optimizing the heat dissipation structure of the magnetic components, so that the magnetic components can withstand more power consumption with a smaller size and weight. However, these two methods usually require more complex electrical and structural designs, and the cost is relatively high. Utility Model Content
[0004] This utility model embodiment proposes an integrated inductor to reduce the size and weight of magnetic components at a lower cost. The integrated inductor includes: a magnetic core and at least two windings; the magnetic core includes a top post, a bottom post, a yoke, and two sets of side posts; each set of side posts includes two side posts arranged opposite each other; at least one of the top post and the bottom post has the same permeability as the yoke.
[0005] The top post, the bottom post, and the magnetic yoke are parallel to each other, and the magnetic yoke is located between the top post and the bottom post;
[0006] Each set of side posts is perpendicular to the top post, the bottom post, and the magnetic yoke, and the magnetic yoke is located between two sets of side posts;
[0007] The top post, the magnetic yoke, and a set of side posts form a rectangle, and the bottom post, the magnetic yoke, and another set of side posts form another rectangle;
[0008] One winding is wound on the top post, bottom post, or side post of each rectangle.
[0009] In one embodiment, the permeability of the top post and / or the bottom post, and the yoke is higher than the permeability of the two sets of side posts.
[0010] In one embodiment, the top pillar and / or the bottom pillar, and the magnetic yoke are amorphous columnar structures, nanocrystalline columnar structures, or ferrite columnar structures.
[0011] In one embodiment, the two sets of side pillars are metal magnetic powder core columnar structures.
[0012] In one embodiment, at least one of the following locations—the junction of the top column and the side column, the junction of the bottom column and the side column, and the junction of the magnetic yoke and the side column—is provided with an air gap plate.
[0013] In one embodiment, at least one of the joints between the top post and the side post, the bottom post and the side post, and the magnetic yoke and the side post has a predetermined gap.
[0014] This utility model embodiment also provides an integrated inductor device, which includes the aforementioned integrated inductor.
[0015] The integrated inductor provided in this embodiment of the present invention includes: a magnetic core and at least two windings; the magnetic core includes a top post, a bottom post, a yoke, and two sets of side posts; each set of side posts includes two side posts arranged opposite each other; at least one of the top post and the bottom post has the same permeability as the yoke; the top post, the bottom post, and the yoke are parallel to each other, and the yoke is located between the top post and the bottom post; each set of side posts is perpendicular to the top post, the bottom post, and the yoke, and the yoke is located between two sets of side posts; the top post, the yoke, and one set of side posts form a rectangle, and the bottom post, the yoke, and the other set of side posts form another rectangle; a winding is wound on the top post, bottom post, or side post of each rectangle. Compared with existing magnetic device structures, the integrated inductor of this utility model embodiment consists of a top post, a yoke, and a set of side posts forming a rectangle, and a bottom post, a yoke, and another set of side posts forming another rectangle. A winding is wound on the top post, bottom post, or side post of each rectangle to obtain two inductors. This allows two adjacent inductors to share a single yoke, which can reduce the volume and weight of the magnetic components at a lower cost. Furthermore, by making at least one of the top post or bottom post have the same permeability as the yoke, the total magnetic reluctance of the magnetic circuit is further reduced, thereby further reducing the volume and weight of the magnetic components. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0017] Figure 1 This is a structural diagram of an integrated inductor provided in an embodiment of the present utility model;
[0018] Figure 2 This is a schematic diagram of the structure of another integrated inductor provided in this embodiment of the present utility model;
[0019] Figure 3This is a schematic diagram of the structure of another integrated inductor provided in this embodiment of the present utility model;
[0020] Figure 4 This is a schematic diagram of the structure of another integrated inductor provided in this embodiment of the present utility model;
[0021] Figure 5 Provided in the embodiments of this utility model Figure 1 A schematic diagram showing the length markings of the side posts, top posts, and bottom posts of an inductor;
[0022] Figure 6 Provided in the embodiments of this utility model Figure 5 Schematic diagram of the corresponding equivalent magnetic circuit model;
[0023] Figure 7 This is a schematic diagram of the magnetic flux flowing through the yoke provided in an embodiment of the present utility model;
[0024] Figure 8 This is a schematic diagram of the integrated inductor with an air gap provided in an embodiment of this utility model;
[0025] Figure 9 Provided in the embodiments of this utility model Figure 8 The corresponding equivalent magnetic circuit model schematic diagram. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of this utility model and their descriptions are used to explain this utility model, but are not intended to limit this utility model.
[0027] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.
[0028] Currently, in order to reduce the size and weight of magnetic components, existing technologies can achieve this by planning from a system perspective, increasing the operating frequency of the magnetic components, or optimizing the heat dissipation structure of the magnetic components, so that the magnetic components can withstand more power consumption with a smaller size and weight. However, these two methods usually require more complex electrical and structural designs, and the cost is relatively high.
[0029] Therefore, this utility model embodiment provides an integrated inductor that utilizes magnetic integration technology to reduce the size and weight of magnetic components at low cost.
[0030] Figure 1 This is a structural diagram of an integrated inductor provided for an embodiment of the present utility model. (See diagram below.) Figure 1 As shown, the integrated inductor includes: a magnetic core and at least two windings; the magnetic core includes a top post 1, a bottom post 2, a yoke 3 and two sets of side posts 4; each set of side posts includes two side posts 4 arranged opposite each other; at least one of the top post 1 and the bottom post 2 has the same permeability as the yoke 3.
[0031] Top column 1, bottom column 2 and magnetic yoke 3 are parallel to each other, with magnetic yoke 3 located between top column 1 and bottom column 2;
[0032] Each set of side posts 4 is perpendicular to the top post 1, the bottom post 2 and the magnetic yoke 3, and the magnetic yoke 3 is located between the two sets of side posts 4;
[0033] Top pillar 1, magnetic yoke 3 and a set of side pillars 4 form a rectangle A, bottom pillar 2, magnetic yoke 3 and another set of side pillars 4 form another rectangle A;
[0034] A winding 5 is wound on the top post, bottom post, or side post of each rectangle A to obtain two inductors.
[0035] In this embodiment of the invention, the two inductors share a single yoke, which can reduce the volume and weight of the magnetic components at a lower cost. Furthermore, by making at least one of the top or bottom pillars have the same permeability as the yoke, the total magnetic reluctance of the magnetic circuit is further reduced, thereby further reducing the volume and weight of the magnetic components.
[0036] In this embodiment of the invention, the permeability of the top pillar 1 and / or the bottom pillar 2 and the magnetic yoke 3 is higher than that of the two sets of side pillars 4. Therefore, in one embodiment, the top pillar 1 and / or the bottom pillar 2 and the magnetic yoke 3 can be an amorphous columnar structure, a nanocrystalline columnar structure, or a ferrite columnar structure; the two sets of side pillars 4 can be a metal magnetic powder core columnar structure.
[0037] In a specific example Figure 1 A structural diagram of an integrated inductor is shown, such as Figure 1 As shown, the magnetic permeability of yoke 3 and top pillar 1 is the same, and the magnetic permeability of yoke 3 and top pillar 1 is higher than that of the two sets of side pillars 4 and bottom pillar 2. Figure 1 In the middle, the windings 5 of the two inductors are both wound on the side posts 4 of the two inductors.
[0038] In a specific example Figure 2 A structural diagram of another type of integrated inductor is shown, such as Figure 2 As shown, the magnetic permeability of the yoke 3, top post 1, and bottom post 2 is the same, and the magnetic permeability of the yoke 3, top post 1, and bottom post 2 is higher than that of the two sets of side posts 4. The windings 5 of the two inductors are both wound on the side posts 4 of the two inductors.
[0039] In a specific example Figure 3 A structural diagram of another type of integrated inductor is shown, such as Figure 3 As shown, the magnetic permeability of the yoke 3 and the top post 1 is the same, and the magnetic permeability of the yoke 3 and the top post 1 is higher than that of the two sets of side posts 4 and bottom posts 2. The windings 5 of the two inductors are wound on the top post 1 and the bottom post 2.
[0040] In a specific example Figure 4 A structural diagram of another type of integrated inductor is shown, such as Figure 4 As shown, the magnetic permeability of the yoke 3, top post 1, and bottom post 2 is the same, and the magnetic permeability of the yoke 3, top post 1, and bottom post 2 is higher than that of the two sets of side posts 4. The windings 5 of the two inductors are wound on the top post 1 and the bottom post 2.
[0041] The following is based on Figure 1 For example, based on the principle of magnetic circuits, it can be explained that the integrated inductor of this invention can reduce the size and weight of the inductor.
[0042] First, the principle of magnetic flux decoupling between two adjacent inductors in an integrated inductor is analyzed using magnetic circuit theory.
[0043] Assume N is the number of turns in the winding of inductor A1, and I1 is the current in inductor A1; Figure 5 As shown, assume L1 is the length of the side post of inductor A1, and the magnetic circuit area of the side post of inductor A1 is Ae1; L2 is the length of the top post, and the magnetic circuit area of the top post is Ae2; L3 is the length of the side post of inductor A2, and the magnetic circuit area of the side post of inductor A2 is Ae3; the magnetic circuit area of the yoke is Ae4, and the magnetic circuit area of the bottom post is Ae5; the permeability of the side posts is... The magnetic permeability of the yoke is The permeability of the top column is The permeability of the bottom column is .
[0044] According to magnetic circuit theory, it can be drawn as follows: Figure 6 The equivalent magnetic circuit model shown is, Figure 5 The equivalent magnetic circuit model of the integrated inductor, based on Figure 6 Analysis shows that:
[0045] The magnetic potential is N×I1;
[0046] R1 is the reluctance of the left side post of inductor A1, and ;
[0047] R2 is the reluctance of the yoke, and ;
[0048] R3 is the reluctance of the top post, and ;
[0049] R4 is the reluctance of the right post of inductor A1, and ;
[0050] R5 is the reluctance of the left side post of inductor A2, and ;
[0051] R6 is the reluctance of the right side post of inductor A2, and ;
[0052] R7 is the reluctance of the bottom post, and ;
[0053] According to the magnetic circuit theory, a part of the magnetic potential flux flowing through R2 is shunted by R5, R6, and R7. Since in the embodiment of the present invention, the magnetic permeability of the yoke is much higher than that of the side posts and the bottom post, and generally the magnetic flux area and the magnetic circuit length do not differ too much, R2 is much smaller than (R5 + R6 + R7). Therefore, it can be considered that all the magnetic flux flows into R2. Based on the same principle, for inductor 2, all its magnetic flux also flows into R2, and almost no magnetic flux flows through (R1 + R3 + R4). Therefore, inductors A1 and A2 can be decoupled.
[0054] Furthermore, Figure 7 is a schematic diagram of the magnetic flux flowing through the yoke. As Figure 7 shown, Ф1 is the magnetic flux generated by inductor A1, and Ф2 is the magnetic flux generated by inductor A2. By controlling the angle between vectors Ф1 and Ф2, magnetic flux cancellation can be achieved, so that the magnetic flux of the yoke is smaller. Furthermore, to achieve the same magnetic flux, the yoke can use a smaller magnetic flux area, thereby reducing the volume and weight of the integrated inductor.
[0055] Based on the same principle, in Figure 2 or Figure 4 where the magnetic permeability of the top post, the bottom post, and the yoke is the same, the volume and weight of the integrated inductor can be further reduced. Specifically, since the magnetic permeability of the top post and the bottom post is much higher than that of the side posts, in Figure 6 R3 << R1, R3 << R4, and it can be considered that the only reluctances are R1 and R4. Thus, for inductor A1, the reluctance of R3 can be ignored, further reducing the total magnetic reluctance of the magnetic circuit. According to the magnetic circuit theory, the inductance value L of inductor A1 is:
[0056]
[0057] As can be seen, due to the reduction in magnetic reluctance, for the same inductance value, the number of turns N of the winding coil of inductor A1 can be further reduced. Thus, the length L1 of the side post can be further reduced. Therefore, for inductor A1, both its winding coil and side post are further reduced. The same principle applies to inductor A2. Therefore, it is possible to reduce the size and weight of integrated inductors at low cost.
[0058] In this embodiment of the invention, an air gap can be added to the inductor to ensure the inductance attenuation curve. In one embodiment, an air gap plate can be provided at at least one of the joints of the top post and the side post, the bottom post and the side post, and the yoke and the side post. Alternatively, in another embodiment, a predetermined gap can be provided at at least one of the joints of the top post and the side post, the bottom post and the side post, and the yoke and the side post.
[0059] In a specific example Figure 8 This is a schematic diagram of the structure of an integrated inductor with an air gap provided in an embodiment of the present invention. It should be noted that... Figure 8 In order to be in Figure 5 A schematic diagram of an integrated inductor with an added air gap is shown. (Example) Figure 8 As shown, it is possible to Figure 8 Air gaps are added at one or more points B1, C1, D1, and E1 of inductor A1, and air gaps are added at one or more points B2, C2, D2, and E3 of inductor A2. The air gaps can be air gap plates or gaps created by grinding magnetic pillars; no specific limitation is made here.
[0060] The following analysis uses magnetic circuit theory. Figure 8 The principle of achieving magnetic flux decoupling when inductor 1 and inductor 2 have an air gap.
[0061] Since the relative permeability of the air gap is 1, its magnetic reluctance is higher. According to magnetic circuit theory, the following diagram can be drawn: Figure 9 The equivalent magnetic circuit model shown is, Figure 8 Equivalent magnetic circuit model of an integrated inductor with an air gap.
[0062] Figure 9 In the diagram, R11, R81, R51, and R61 represent the air gap reluctance of each side post. From the above analysis of the integrated inductor without an air gap, we know that: R2 << (R5 + R7 + R6);
[0063] Since the air gap magnetic reluctance is relatively large, we can obtain: R2<<(R5+R7+R6+R51+R61).
[0064] Therefore, the magnetic flux generated by inductor A1 on the yoke flows entirely into R2, and similarly, the magnetic flux generated by inductor A2 on the yoke also flows entirely into R2. Based on this, even with air gaps added to both inductors, decoupling of inductors A1 and A2 can still be achieved.
[0065] Furthermore, through control Figure 8 The phase of the two magnetic flux vectors of inductor A1 and inductor A2 results in a smaller magnetic flux flowing through the yoke. Therefore, when the same magnetic flux is required, the magnetic flux area of the yoke can be further reduced, thereby reducing the size and weight of the integrated inductor.
[0066] Based on the same principle, Figure 2 or Figure 4 If air gaps are added at B1, C1, D1, and E1 of inductor A1, and at B2, C2, D2, and E3 of inductor A2, for inductor A1, since both the top and bottom posts use magnetic materials with high permeability, the magnetic reluctance of R3 can be almost ignored. According to magnetic circuit theory, for the same inductance value, the number of turns N of the winding coil of inductor A1 can be further reduced, which can further reduce the length of the side posts of inductor A1. The same principle applies to inductor A2. Therefore, the total volume and weight of the inductor can be reduced.
[0067] In summary, the integrated inductor provided in this embodiment of the present invention includes: a magnetic core and at least two windings; the magnetic core includes a top post, a bottom post, a yoke, and two sets of side posts; each set of side posts includes two side posts arranged opposite each other; at least one of the top post and the bottom post has the same permeability as the yoke; the top post, the bottom post, and the yoke are parallel to each other, and the yoke is located between the top post and the bottom post; each set of side posts is perpendicular to the top post, the bottom post, and the yoke, and the yoke is located between the two sets of side posts; the top post, the yoke, and one set of side posts form a rectangle, and the bottom post, the yoke, and the other set of side posts form another rectangle; a winding is wound on the top post, the bottom post, or the side post of each rectangle. Compared with existing magnetic device structures, the integrated inductor of this utility model embodiment consists of a top post, a yoke, and a set of side posts forming a rectangle, and a bottom post, a yoke, and another set of side posts forming another rectangle. A winding is wound on the top post, bottom post, or side post of each rectangle to obtain two inductors. This allows two adjacent inductors to share a single yoke, which can reduce the volume and weight of the magnetic components at a lower cost. Furthermore, by making at least one of the top post or bottom post have the same permeability as the yoke, the total magnetic reluctance of the magnetic circuit is further reduced, thereby further reducing the volume and weight of the magnetic components.
[0068] This utility model embodiment also provides an integrated inductor device, which includes the aforementioned integrated inductor. The principle of this integrated inductor device in solving the problem is similar to that of the aforementioned integrated inductor, and the repeated details will not be described again.
[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. An integrated inductor, characterized in that, include: A magnetic core and two windings; the magnetic core includes a top post, a bottom post, a yoke, and two sets of side posts; each set of side posts includes two side posts arranged opposite each other; at least one of the top post and the bottom post has the same permeability as the yoke; The top post, the bottom post, and the magnetic yoke are parallel to each other, and the magnetic yoke is located between the top post and the bottom post; Each set of side posts is perpendicular to the top post, the bottom post, and the magnetic yoke, and the magnetic yoke is located between two sets of side posts; The top post, the magnetic yoke, and a set of side posts form a rectangle, and the bottom post, the magnetic yoke, and another set of side posts form another rectangle; One winding is wound on the top post, bottom post, or side post of each rectangle.
2. The integrated inductor as described in claim 1, characterized in that, The permeability of the top post and / or the bottom post, and the yoke is higher than that of the two sets of side posts.
3. The integrated inductor as described in claim 2, characterized in that, The top pillar and / or the bottom pillar, and the magnetic yoke are amorphous columnar structures, nanocrystalline columnar structures, or ferrite columnar structures.
4. The integrated inductor as described in claim 2, characterized in that, The two sets of side pillars are columnar structures with metal magnetic powder cores.
5. The integrated inductor as described in claim 1, characterized in that, An air gap plate is provided at least one of the following locations: the junction of the top column and the side column, the junction of the bottom column and the side column, and the junction of the magnetic yoke and the side column.
6. The integrated inductor as described in claim 1, characterized in that, At least one of the following locations—the junction of the top column and the side column, the junction of the bottom column and the side column, and the junction of the magnetic yoke and the side column—has a pre-defined gap.
7. An integrated inductor device, characterized in that, Including the integrated inductor as described in any one of claims 1-6.