High-voltage-resistant common-mode inductor

Abstract

The utility model provides a high-voltage-resistant common-mode inductor which comprises a shell, a magnetic core, a winding and a reinforcing insulator, the winding is wound on the magnetic core, the magnetic core is arranged in the shell, the reinforcing insulator wraps the magnetic core and the winding, the shell is filled with the reinforcing insulator, and the reinforcing insulator is thermosetting resin; the shell is filled with the reinforcing insulator, the reinforcing insulator can fix the magnetic core located in the shell and prevent the magnetic core from shaking in the shell, the magnetic core and the winding are wrapped with the reinforcing insulator, the reinforcing insulator can improve the insulating performance of the magnetic core and the winding and prevent an insulating coating outside the magnetic core or the winding from being broken down, and meanwhile the magnetic core and the winding can be prevented from being broken down. The reinforcing insulator wrapping the winding can make up the pinhole defect of the winding, and short circuit between the magnetic core and the winding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, and in particular to a high-voltage resistant common-mode inductor. Background Art

[0002] Chip common-mode inductors are electronic components commonly used in circuits to suppress common-mode interference or provide filtering. Their design allows them to be easily soldered onto printed circuit boards, helping to reduce noise and interference in circuits. These inductors typically feature a small size and low profile to accommodate the size and space requirements of modern electronic devices.

[0003] In the prior art, regarding the pinhole properties of enameled wire, the JIS international standard requires that 6M wire must not have more than 6 pinholes. Regarding chip common-mode inductors, please refer to the prior patent application with application number 2024205290387.

[0004] During the use of the inductor, the outer coating of the core or winding may fall off after friction, collision or extrusion between the winding and the magnetic core. The copper wire in the magnetic core and enameled wire are both conductors. When the voltage is too high, the winding and the magnetic core are prone to short circuit. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the present application provides a high-voltage resistant common-mode inductor.

[0006] A high-voltage resistant common-mode inductor disclosed in the present application includes: a shell, a magnetic core, a winding and a reinforced insulator. The winding is wound around the magnetic core, and the magnetic core is arranged in the shell. The reinforced insulator covers the magnetic core and the winding respectively, and the reinforced insulator is filled in the shell. The reinforced insulator is a thermosetting resin.

[0007] Preferably, the reinforced insulator is made of epoxy insulating powder.

[0008] Preferably, the reinforced insulation is made of polyester insulation powder.

[0009] Preferably, the particle size of the reinforced insulator is 200-1000 mesh.

[0010] Preferably, the magnetic core includes two plates and two columns. The two plates are parallel and opposite to each other. The two columns are located between the two plates, and the two columns are respectively located at the two ends of the length direction of the plates. The two plates and the two columns are formed as one piece, and the windings are respectively wound on the two columns.

[0011] Preferably, the windings are made of flat enameled copper wire.

[0012] Preferably, the shell includes a bottom wall and a side wall, the side wall is upright on the bottom wall, and two groups of openings are provided at one end of the side wall facing away from the bottom wall, and the two groups of openings are respectively located on opposite sides of the side wall; the winding extends out of the shell through the opening.

[0013] Preferably, the bottom wall and the side walls are formed integrally.

[0014] The beneficial effects of the present application are as follows: in this way, the reinforced insulator is filled in the shell, and the reinforced insulator can fix the magnetic core located in the shell to prevent the magnetic core from shaking in the shell. The reinforced insulator is respectively wrapped around the magnetic core and the winding, and the reinforced insulator can improve the insulation performance of the magnetic core and the winding to prevent the insulating coating outside the magnetic core or the winding from being punctured. At the same time, the reinforced insulator wrapped around the winding can make up for the pinhole defect of the winding and prevent the magnetic core and the winding from short circuiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 This is a three-dimensional diagram of the high-voltage common-mode inductor after the reinforced insulator is hidden in the embodiment;

[0017] Figure 2 Schematic diagram of the magnetic core structure in the embodiment;

[0018] Figure 3 Schematic diagram of the housing structure in the embodiment;

[0019] Figure 4 Schematic diagram of the coordination relationship between the reinforced insulator, the magnetic core and the winding in the embodiment.

[0020] Reference numerals:

[0021] 1-shell; 2-magnetic core; 3-winding; 4-reinforced insulator;

[0022] 11- bottom wall; 12- side wall;

[0023] 21- plate; 22- column;

[0024] 121-opening; 1211-groove. DETAILED DESCRIPTION

[0025] The following diagrams illustrate various embodiments of the present application. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present application. In other words, in some embodiments of the present application, these practical details are not essential. Furthermore, to simplify the drawings, some conventional structures and components are depicted in a simplified schematic manner.

[0026] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, in this application, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or ranking, nor are they used to limit this application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] In order to further understand the application content, features and effects of this application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0029] See also Figure 1 and Figure 4 , Figure 1 This is a three-dimensional diagram of a high-voltage common-mode inductor with a hidden reinforced insulator. Figure 4 To strengthen the schematic diagram of the coordination between the insulator, the magnetic core, and the winding, the high-voltage common-mode inductor in this example includes a housing 1, a magnetic core 2, a winding 3, and a reinforced insulator 4. The housing 1 is used to support the magnetic core 2, the winding 3, and the reinforced insulator 4. The magnetic core 2 is used to generate a magnetic field and support the winding 3. The winding 3 is used to pass current. The reinforced insulator 4 is used to fix the magnetic core 2 and the winding 3.

[0030] The winding 3 is wound around the magnetic core 2 , which is disposed in the housing 1 . The reinforced insulator 4 covers the magnetic core 2 and the winding 3 respectively, and the reinforced insulator 4 is filled in the housing 1 .

[0031] In this example, the high-voltage resistant common-mode inductor is a chip-type EQ common-mode inductor, whose magnetic core 2 adopts an iron aluminum silicon magnetic core 2, and the winding 3 includes two sets of coils, which are wound with flat enameled wire. The two sets of coils are respectively wound on both sides of the magnetic core 2, and the number of turns of the two coils is the same. The reinforced insulator 4 can be made of epoxy insulating powder or polyester insulating powder, which is filled in the shell 1 and respectively coated on the magnetic core 2 and the winding 3, that is, the reinforced insulator 4 is filled in the shell 1 and is located between the magnetic core 2 and the winding 3.

[0032] In this way, the reinforced insulator 4 is filled in the shell 1. The reinforced insulator 4 can fix the magnetic core 2 located in the shell 1 to prevent the magnetic core 2 from shaking in the shell 1. The reinforced insulator 4 is respectively wrapped around the magnetic core 2 and the winding 3. The reinforced insulator 4 can improve the insulation performance of the magnetic core 2 and the winding 3 to prevent the insulating coating outside the magnetic core 2 or the winding 3 from being punctured. At the same time, the reinforced insulator 4 covering the winding 3 can make up for the pinhole defect of the winding 3 to prevent the magnetic core 2 and the winding 3 from short circuiting.

[0033] Furthermore, the particle size of the reinforcing insulator 4 is between 200 mesh and 1000 mesh, that is, the particle size of the reinforcing insulator 4 is between 10 microns and 70 microns.

[0034] In this way, it is ensured that the reinforced insulator 4 can be evenly covered on the outside of the magnetic core 2 and the winding 3 .

[0035] Please also refer to Figure 2 , Figure 2 It is a schematic diagram of the magnetic core structure. Furthermore, the magnetic core 2 includes two plates 21 and two columns 22. The two plates 21 are parallel and opposite to each other. The two columns 22 are located between the two plates 21, and the two columns 22 are respectively located at the two ends of the length direction of the plates 21. The two plates 21 and the two columns 22 are formed as one piece, and the windings 3 are respectively wound on the two columns 22.

[0036] Specifically, the two plates 21 are arranged opposite to each other and in parallel, the two columns 22 are located between the two plates 21, the columns 22 are arranged perpendicular to the plates 21, the two columns 22 are parallel to each other, the cross-section of the plate 21 is rectangular or elliptical, the two columns 22 are respectively located at the two ends of the length direction of the plate 21, the two columns 22 and the two plates 21 both use iron aluminum silicon magnetic core 2, the two columns 22 and the two plates 21 are formed as one piece, and the two groups of coils of the winding 3 are respectively wound on the two columns 22.

[0037] Thus, compared with the conventional spliced ​​U-shaped magnetic core 2 , the integrally formed magnetic core 2 can reduce the loss of magnetic flux in the magnetic core 2 .

[0038] Please also refer to Figure 3 , Figure 3 Schematic diagram of the shell structure. Further, the shell 1 includes a bottom wall 11 and a side wall 12. The side wall 12 is upright on the bottom wall 11. Two groups of openings 121 are provided at one end of the side wall 12 facing away from the bottom wall 11. The two groups of openings 121 are respectively located on opposite sides of the side wall 12. The bottom wall 11 and the side wall 12 are both made of insulating material; the winding 3 extends out of the shell 1 through the opening 121.

[0039] In this example, the cross-section of the bottom wall 11 is rectangular, and there are four side walls 12. The four side walls 12 are erected on the periphery of the bottom wall 11, and the four side walls 12 are located on the same surface of the bottom wall 11. The four side walls 12 are enclosed, and the opening 121 is provided at one end of the side wall 12 facing away from the bottom wall 11, and two groups of openings 121 are respectively located on both sides of the width direction of the bottom wall 11. Each group of openings 121 includes two grooves 1211. The two ends of the coil of the winding 3 extend out of the shell 1 from the grooves 1211, that is, the high-voltage common-mode inductor can be provided with pins at the openings 121, and the winding 3 can be connected to the electronic components through the openings 121.

[0040] Furthermore, the bottom wall 11 and the side wall 12 are integrally formed.

[0041] Specifically, the bottom wall 11 and the side wall 12 are made by injection molding, which can reduce the production cost of the housing 1 .

[0042] In summary, the reinforced insulator is filled in the shell, and the reinforced insulator can fix the magnetic core in the shell to prevent the magnetic core from shaking in the shell. The reinforced insulator is respectively wrapped around the magnetic core and the winding. The reinforced insulator can improve the insulation performance of the magnetic core and the winding, and prevent the insulating coating outside the magnetic core or the winding from being punctured. At the same time, the reinforced insulator wrapped around the winding can make up for the pinhole defect of the winding and avoid a short circuit between the magnetic core and the winding.

[0043] The above is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A high-voltage common-mode inductor, characterized in that: include: A shell (1), a magnetic core (2), a winding (3) and a reinforced insulator (4), wherein the winding (3) is wound around the magnetic core (2), the magnetic core (2) is arranged in the shell (1), the reinforced insulator (4) respectively covers the magnetic core (2) and the winding (3), and the reinforced insulator (4) is filled in the shell (1), and the reinforced insulator (4) is a thermosetting resin.

2. The high-voltage common-mode inductor according to claim 1, characterized in that: The reinforced insulator (4) is made of epoxy insulating powder.

3. The high-voltage common-mode inductor according to claim 1, characterized in that: The reinforced insulator (4) is made of polyester insulating powder.

4. The high-voltage common-mode inductor according to claim 2 or 3, characterized in that: The reinforced insulator (4) has a particle size of 200-1000 mesh.

5. The high-voltage common-mode inductor according to claim 1, characterized in that: The magnetic core (2) comprises two plates (21) and two columns (22), the two plates (21) are arranged parallel and opposite to each other, the two columns (22) are located between the two plates (21), and the two columns (22) are respectively located at two ends of the length direction of the plates (21), the two plates (21) and the two columns (22) are integrally formed, and the winding (3) is respectively wound on the two columns (22).

6. The high-voltage common-mode inductor according to claim 5, characterized in that: The winding (3) uses flat enameled copper wire.

7. The high-voltage common-mode inductor according to claim 1, characterized in that: The housing (1) comprises a bottom wall (11) and a side wall (12); the side wall (12) is erected on the bottom wall (11); one end of the side wall (12) facing away from the bottom wall (11) is provided with two groups of openings (121); the two groups of openings (121) are respectively located on opposite sides of the side wall (12); the winding (3) extends out of the housing (1) through the openings (121).

8. The high-voltage common-mode inductor according to claim 7, characterized in that: The bottom wall (11) and the side wall (12) are integrally formed.

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