Inductor and manufacturing device thereof

Abstract

The invention belongs to the technical field of inductors, and discloses an inductor and a manufacturing device thereof. The inductor comprises a magnetic core, a conductive coil and a magnetic rubber layer, and the conductive coil is wound outside the magnetic core; the magnetic rubber layer is coated outside the conductive coil, the magnetic rubber layer comprises at least one magnetic rubber section, the magnetic rubber section is formed by flowing, extending and curing magnetic rubber along the circumferential direction of the conductive coil, and the magnetic rubber section is in close contact with the outer circumferential surface of the conductive coil. The magnetic glue layer is coated outside the conductive coil, so that the magnetic line of force can be restrained, and the connection strength between the conductive coil and the magnetic core can also be improved. The magnetic glue flows and extends along the circumferential direction of the conductive coil, so that the magnetic glue layer is distributed more uniformly, and the distribution uniformity of the magnetic glue layer can be improved. And when the magnetic glue flows and extends along the circumferential direction of the conductive coil, the magnetic glue layer can be in close contact with the outer circumferential surface of the conductive coil, so that a gap between the magnetic glue layer and the outer circumferential surface of the conductive coil and a gap in the conductive coil can be reduced, the magnetic conductivity and the inductance value of the inductor are improved, and miniaturization of the inductor is facilitated.

Description

Technical Field

[0001] This invention relates to the field of inductor technology, and more particularly to an inductor and an apparatus for manufacturing the same. Background Technology

[0002] Inductors are key components in circuits, and their core structure typically includes a magnetic core and a conductive coil wound around it. To improve inductor performance, magnetic adhesive is applied to the wound conductive coil. This application of magnetic adhesive helps to constrain magnetic lines of force and reduce magnetic leakage.

[0003] However, existing inductors suffer from uneven magnetic adhesive distribution during the coating process, tending to concentrate in localized areas, which degrades the inductor's magnetic properties. Furthermore, in current inductor structures, the magnetic adhesive is typically coated on the outer surface of the conductive coil, with gaps between the adhesive and the coil's outer surface, and numerous gaps also exist within the coil itself. These gaps disrupt the continuity and integrity of the magnetic flux path, leading to a decrease in the inductor's permeability and thus its inductance. To achieve the target inductance, it is often necessary to increase the number of turns in the conductive coil or the size of the magnetic core, which hinders inductor miniaturization. Therefore, there is an urgent need for an inductor and its manufacturing apparatus to solve these technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide an inductor and its manufacturing apparatus, which makes the distribution of the magnetic adhesive layer more uniform, improves the uniformity of the magnetic adhesive layer distribution, and at the same time reduces the gap between the magnetic adhesive layer and the outer surface of the conductive coil and within the conductive coil, thereby increasing the magnetic permeability and inductance of the inductor and facilitating the miniaturization of the inductor.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On the one hand, an inductor is provided, comprising:

[0007] magnetic core;

[0008] A conductive coil, the conductive coil being wound around the magnetic core;

[0009] A magnetic adhesive layer is provided, which covers the conductive coil. The magnetic adhesive layer includes at least one magnetic adhesive segment, which is formed by the magnetic adhesive flowing and extending along the circumference of the conductive coil and then curing. The magnetic adhesive segment is in close contact with the outer peripheral surface of the conductive coil.

[0010] In some possible implementations, at least two magnetic adhesive segments are provided, and the at least two magnetic adhesive segments are distributed along the circumference of the magnetic core and connected in sequence to form the magnetic adhesive layer.

[0011] In some possible implementations, the magnetic adhesive layer comprises magnetic particles and a colloid, wherein the magnetic particles are uniformly distributed within the colloid.

[0012] In some possible implementations, the magnetic core includes a core post, and the conductive coil is wound around the core post.

[0013] In some possible implementations, the magnetic core further includes an upper magnetic core blade and a lower magnetic core blade, the upper magnetic core blade and the lower magnetic core blade being respectively disposed at both ends of the magnetic core post, and the magnetic adhesive layer being in contact with at least one of the upper magnetic core blade and the lower magnetic core blade.

[0014] In some possible implementations, the upper end of the outer wall of the magnetic adhesive layer extends to connect with the lower edge of the upper magnetic core blade, and the lower end of the outer wall of the magnetic adhesive layer extends to connect with the upper edge of the lower magnetic core blade.

[0015] In some possible implementations, a first space exists between the top surface of the conductive coil and the upper magnetic core blade, and the magnetic adhesive layer extends and fills the first space; and / or, a second space exists between the bottom surface of the conductive coil and the lower magnetic core blade, and the magnetic adhesive layer extends and fills the second space.

[0016] In some possible implementations, the cross-sectional area of ​​the upper magnetic core blade is smaller than that of the lower magnetic core blade.

[0017] On the other hand, an apparatus for manufacturing an inductor is provided, used to manufacture an inductor as described in any of the above embodiments, comprising:

[0018] A clamp used to hold a magnetic core on which a conductive coil is wound.

[0019] A dispensing component for applying magnetic adhesive onto the conductive coil;

[0020] A magnetic field applicator is used to apply a magnetic field, causing the magnetic adhesive to flow and extend circumferentially along the conductive coil.

[0021] In some possible implementations, the magnetic field applicator is a helical coil, or the magnetic field applicator is two Helmholtz coils arranged in parallel and coaxially, with the magnetic core located between the two Helmholtz coils and the axis of the Helmholtz coils perpendicular to the axis of the magnetic core.

[0022] The beneficial effects of this invention are:

[0023] The inductor provided by this invention includes a magnetic core, a conductive coil, and a magnetic adhesive layer, with the conductive coil wound around the magnetic core. Covering the conductive coil with the magnetic adhesive layer enables the constraint of magnetic lines of force and improves the connection strength between the conductive coil and the magnetic core. The magnetic adhesive layer includes at least one magnetic adhesive segment, formed by the magnetic adhesive flowing and extending circumferentially along the conductive coil and then solidifying, with the segment in close contact with the outer peripheral surface of the conductive coil. Extending the magnetic adhesive along the circumferential direction of the conductive coil results in a more uniform distribution of the magnetic adhesive layer, improving its uniformity. Simultaneously, the flow of the magnetic adhesive along the circumferential direction allows for close contact between the magnetic adhesive layer and the outer peripheral surface of the conductive coil, reducing the gap between them. Even when gaps exist within the conductive coil, this facilitates the magnetic adhesive entering and filling these gaps. Therefore, this invention reduces the gaps between the magnetic adhesive layer and the outer peripheral surface of the conductive coil, as well as the gaps within the conductive coil, increasing the inductor's permeability and inductance, thus contributing to the miniaturization of the inductor.

[0024] The present invention also provides an inductor manufacturing apparatus. The inductor manufactured by the inductor manufacturing apparatus can improve the uniformity of the magnetic adhesive layer distribution, reduce the gap between the magnetic adhesive layer and the outer peripheral surface of the conductive coil and the gap inside the conductive coil, improve the magnetic permeability and inductance of the inductor, and facilitate the miniaturization of the inductor. Attached Figure Description

[0025] Figure 1 This is a first-view structural schematic diagram of the inductor provided by the present invention;

[0026] Figure 2 This is a second-view structural schematic diagram of the inductor provided by the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the inductor (magnetic adhesive layer not shown) provided by the present invention;

[0028] Figure 4 yes Figure 2 Cross-sectional view at point AA;

[0029] Figure 5 yes Figure 2 Cross-sectional view at point BB;

[0030] Figure 6 This is a schematic diagram of the structure of the inductor (magnetic adhesive layer not shown), fixture, dispensing component and spiral coil involved in this invention;

[0031] Figure 7 This is a schematic diagram of the structure of the inductor (magnetic adhesive layer not shown), fixture, dispensing component and Helmholtz coil involved in this invention.

[0032] In the picture:

[0033] 1. Magnetic core; 11. Upper magnetic core blade; 12. Magnetic core post; 13. Lower magnetic core blade; 131. Groove; 2. Conductive coil; 21. Winding; 22. End; 3. Magnetic adhesive layer; 31. Plane; 32. Curved surface; 4. Conductive component;

[0034] 100, Helical coil; 200, Fixture; 300, Dispensing part; 400, Helmholtz coil. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1 to 7 As shown, the present invention provides an inductor including a magnetic core 1, a conductive coil 2 and a magnetic adhesive layer 3. The conductive coil 2 is wound around the magnetic core 1. The magnetic adhesive layer 3 covers the conductive coil 2 and includes at least one magnetic adhesive segment. The magnetic adhesive segment is formed by the magnetic adhesive flowing and extending along the circumference of the conductive coil 2 and being cured. The magnetic adhesive segment is in close contact with the outer peripheral surface of the conductive coil 2.

[0040] Encasing the conductive coil 2 with the magnetic adhesive layer 3 enables the constraint of magnetic lines of force and improves the connection strength between the conductive coil 2 and the magnetic core 1. The magnetic adhesive layer 3 includes at least one magnetic adhesive segment, which is formed by the magnetic adhesive flowing and extending along the circumference of the conductive coil 2 and then curing. The magnetic adhesive segment is in close contact with the outer circumferential surface of the conductive coil 2. By extending the magnetic adhesive along the circumferential direction of the conductive coil 2, the magnetic adhesive is less likely to concentrate in a localized area, resulting in a more uniform distribution of the magnetic adhesive layer 3 and improving its uniformity. At the same time, as the magnetic adhesive flows and extends along the circumferential direction of the conductive coil 2, it enables the magnetic adhesive layer 3 to make close contact with the outer circumferential surface of the conductive coil 2, reducing the gap between the magnetic adhesive layer 3 and the outer circumferential surface of the conductive coil 2. When there are gaps within the conductive coil 2, i.e., gaps between the upper and lower layers and between the inner and outer layers of the conductive coil 2, it is also beneficial for the magnetic adhesive to enter the gaps within the conductive coil 2, allowing the magnetic adhesive layer 3 to fill the gaps within the conductive coil 2. Therefore, the present invention can reduce the gap between the magnetic adhesive layer 3 and the outer peripheral surface of the conductive coil 2, as well as the gap inside the conductive coil 2, thereby improving the magnetic permeability and inductance of the inductor and facilitating the miniaturization of the inductor.

[0041] Optionally, the conductive coil 2 includes at least one set of windings 21, which are wound around the magnetic core 1. Optionally, at least two sets of windings 21 are provided, arranged sequentially from the inside to the outside. This arrangement allows the inductor to have a higher inductance and better electrical performance. It should be noted that the number of windings 21 can be determined based on the size of the magnetic core 1, the volume of the magnetic adhesive layer 3, and the proportion of magnetic particles in the magnetic adhesive layer 3. In this embodiment, as... Figure 4 As shown, the winding 21 has two sets, with one set of windings 21 located outside the other set of windings 21, and the magnetic adhesive segment in close contact with the outer peripheral surface of the outer winding 21. When there are gaps between the upper and lower layers of the outer winding 21 and between the two windings 21, the magnetic adhesive can enter these gaps as it flows and extends along the circumference of the conductive coil 2.

[0042] Optionally, in this embodiment, at least two magnetic adhesive segments are provided, which are distributed along the circumference of the magnetic core 1 and connected sequentially to form the magnetic adhesive layer 3. This arrangement results in a shorter extension length for each magnetic adhesive segment, facilitating control of the magnetic adhesive flow during segment formation and improving the uniformity of the entire magnetic adhesive layer 3. Furthermore, each magnetic adhesive segment can be processed simultaneously, improving the processing efficiency of the magnetic adhesive layer 3. In other embodiments, only one magnetic adhesive segment may be provided, distributed along the circumference of the magnetic core 1 and connected end-to-end.

[0043] Optionally, in this embodiment, the magnetic adhesive layer 3 includes magnetic particles and a colloid, with the magnetic particles uniformly distributed within the colloid. Uniformly distributing the magnetic particles within the colloid improves the inductance rise rate, allowing the inductance value to remain stable over a wider DC bias current range, and reduces high-frequency eddy current losses.

[0044] Optionally, such as Figure 4 and Figure 5 As shown, the magnetic core 1 includes a core post 12, and a conductive coil 2 is wound around the core post 12. This arrangement facilitates the processing of the magnetic core 1. Optionally, in this embodiment, the magnetic core 1 further includes an upper core blade 11 and a lower core blade 13, which are respectively disposed at both ends of the core post 12, and the magnetic adhesive layer 3 is in contact with at least one of the upper core blade 11 and the lower core blade 13. By providing the upper core blade 11 and the lower core blade 13, the closing performance of the magnetic circuit can be improved. In this embodiment, the magnetic adhesive layer 3 is in contact with both the upper core blade 11 and the lower core blade 13. This arrangement allows magnetic lines of force to pass from the upper core blade 11 through the magnetic adhesive layer 3 and enter the lower core blade 13, or vice versa.

[0045] Optionally, in this embodiment, the upper end of the outer wall of the magnetic adhesive layer 3 extends to connect with the lower edge of the upper magnetic core blade 11, and the lower end of the outer wall of the magnetic adhesive layer 3 extends to connect with the upper edge of the lower magnetic core blade 13. While meeting the inductor design dimensions, the coating volume of the magnetic adhesive layer 3 can be increased, allowing the inductor to achieve higher inductance and higher saturation current. Optionally, in this embodiment, as... Figure 1 As shown, the outer wall of the magnetic adhesive layer 3 includes multiple planes 31 and multiple curved surfaces 32. The upper end of the plane 31 is connected to the lower edge of the upper magnetic core blade 11, and the lower end of the plane 31 is connected to the upper edge of the lower magnetic core blade 13. The upper end of the curved surface 32 is connected to the lower edge of the upper magnetic core blade 11, and the lower end of the curved surface 32 is connected to the upper edge of the lower magnetic core blade 13.

[0046] Optionally, in this embodiment, as Figure 4 and Figure 5 As shown, a first space exists between the top surface of the conductive coil 2 and the upper magnetic core blade 11, and the magnetic adhesive layer 3 extends and fills the first space. By providing the first space, the inductor's anti-saturation capability can be improved. Extending the magnetic adhesive layer 3 and filling the first space ensures that the magnetic adhesive layer 3 is in close contact with both the top surface of the conductive coil 2 and the bottom surface of the upper magnetic core blade 11, making the magnetic circuit continuous and increasing the inductance. When there is a gap between the two windings 21, it is beneficial for the magnetic adhesive layer 3 to enter the gap between the two windings 21, which can further increase the inductance. In other embodiments, the top surface of the coil is in contact with the bottom surface of the upper magnetic core blade 11.

[0047] Optionally, in this embodiment, as Figure 4 and Figure 5As shown, a second space exists between the bottom surface of the conductive coil 2 and the lower magnetic core blade 13, and the magnetic adhesive layer 3 extends and fills the second space. By providing the second space, the inductor's resistance to saturation can be improved. Extending the magnetic adhesive layer 3 and filling the second space ensures that the magnetic adhesive layer 3 is in close contact with both the bottom surface of the conductive coil 2 and the top surface of the lower magnetic core blade 13, making the magnetic circuit continuous and increasing the inductance of the inductor. In other embodiments, the bottom surface of the coil is in contact with the top surface of the lower magnetic core blade 13.

[0048] Optionally, in this embodiment, the cross-sectional area of ​​the upper magnetic core blade 11 is smaller than that of the lower magnetic core blade 13. This arrangement makes the magnetic core 1 asymmetrically distributed in the axial direction, which facilitates subsequent screening by the vibratory feeder and makes it easier to automatically arrange the inductors into a uniform orientation.

[0049] Optionally, in this embodiment, the upper magnetic core blade 11 has an octagonal structure. This reduces the likelihood of the upper magnetic core blade 11 scratching the conductive coil 2 during winding. Optionally, the lower magnetic core blade 13 has a quadrilateral structure, with grooves 131 at each of its four corners. The two ends 22 of the conductive coil 2 respectively extend into two of these grooves 131. This configuration reduces the likelihood of the lower magnetic core blade 13 scratching the conductive coil 2 and also reduces the space occupied by the magnetic core 1. Optionally, as... Figure 3 and Figure 5 As shown, the bottom of the lower magnetic core blade 13 is provided with two conductive elements 4, which are arranged one-to-one with two grooves 131. Each end 22 of the conductive coil 2 extends into the corresponding groove 131 and extends horizontally into the conductive element 4. With this arrangement, when the conductive coil 2 is connected to an external mechanism to achieve electrical conduction, the conductive element 4 can be installed on the external mechanism, which can increase the installation area and achieve a reliable connection.

[0050] like Figure 6 and Figure 7As shown, the present invention also provides an inductor manufacturing apparatus for manufacturing the aforementioned inductor. The inductor manufacturing apparatus includes a clamp 200, a dispensing component 300, and a magnetic field applying component. The clamp 200 is used to hold a magnetic core 1 wound with a conductive coil 2. The dispensing component 300 is used to apply magnetic adhesive to the conductive coil 2; specifically, at least one dispensing component 300 is provided. The magnetic field applying component is used to apply a magnetic field, causing the magnetic adhesive to flow and extend circumferentially along the conductive coil 2. The inductor manufactured by this apparatus can improve the uniformity of the magnetic adhesive layer 3 distribution, reduce the gap between the magnetic adhesive layer 3 and the outer peripheral surface of the conductive coil 2, and reduce the gap within the conductive coil 2, thereby increasing the inductor's permeability and inductance, which is beneficial for miniaturization. Furthermore, by utilizing the inherent magnetic response characteristics of the magnetic adhesive, applying a magnetic field to the magnetic adhesive through the magnetic field applying component guides the magnetic adhesive to flow and extend circumferentially along the direction of the magnetic field lines of force, improving the coating accuracy, increasing the automation level of the inductor manufacturing apparatus, and ensuring good consistency among inductors.

[0051] To ensure clamping stability and without affecting the application of magnetic adhesive, the clamp 200 may optionally be used to clamp the upper magnetic core blade 11 of the magnetic core 1. Furthermore, in this embodiment, the clamp 200 can rotate the magnetic core 1. During the application of magnetic adhesive to the conductive coil 2, rotating the magnetic core 1 via the clamp 200 allows for dispensing adhesive at multiple locations circumferentially on the conductive coil 2 using a single dispensing device 300, improving work efficiency. During the application of a magnetic field by the magnetic field applicator, rotating the magnetic core 1 via the clamp 200 increases the length of the magnetic adhesive extending circumferentially along the conductive coil 2 for a single magnetic adhesive. For multiple magnetic adhesives spaced apart circumferentially along the conductive coil 2, it also achieves a uniform distribution of the magnetic adhesive layer 3. Rotating the magnetic core 1 via the clamp 200 during both the application of magnetic adhesive and the application of a magnetic field further improves work efficiency and achieves a uniform distribution of the magnetic adhesive layer 3.

[0052] Alternatively, in one embodiment, as Figure 6 As shown, the magnetic field application component is a spiral coil 100. This configuration allows the magnetic adhesive to flow and extend circumferentially along the conductive coil 2, simplifying the structure of the magnetic field application component. Specifically, the spiral coil 100 extends radially along the inductance. With this configuration, after energizing the spiral coil 100, the non-uniform magnetic field generated by the spiral coil 100 can guide a magnetic adhesive to flow and extend simultaneously to both ends circumferentially along the conductive coil 2, improving working efficiency. It should be noted that the magnetic field strength can be adjusted by changing the number of turns of the spiral coil 100 to accommodate magnetic adhesives of different viscosities.

[0053] Alternatively, in another embodiment, such as Figure 7As shown, the magnetic field application device consists of two Helmholtz coils 400 arranged parallel and coaxially, with the magnetic core 1 located between the two Helmholtz coils 400, and the axis of the Helmholtz coils 400 perpendicular to the axis of the magnetic core 1. With this configuration, after energizing the two parallel and coaxial Helmholtz coils 400, a uniform magnetic field parallel to the axis of the Helmholtz coils 400 is generated in the region between the two Helmholtz coils 400. Since the direction of the magnetic field is tangent to the circumference of the conductive coil 2, the magnetic field can guide the magnetic adhesive to flow and extend along the circumference of the conductive coil 2, and it is suitable for high-viscosity magnetic adhesive applications. Optionally, the two Helmholtz coils 400 are positioned directly opposite the magnetic core 1. With this configuration, both sides of the conductive coil 2 are tangent to the direction of the magnetic field, allowing the magnetic adhesive located on both sides of the conductive coil 2 to extend symmetrically simultaneously, improving working efficiency. In other embodiments, the two Helmholtz coils 400 are offset relative to the magnetic core 1, that is, not directly opposite the magnetic core 1, allowing the magnetic adhesive located on one side of the conductive coil 2 to extend.

[0054] Optionally, the inductor manufacturing apparatus also includes a control mechanism, which is communicatively connected to both the fixture 200 and the magnetic field applicator. The control mechanism is used to control the rotational speed of the fixture 200 and the magnitude of the current input to the magnetic field applicator to adapt to products of different sizes and viscosities.

[0055] Methods for manufacturing inductors include:

[0056] S1. The conductive coil 2 is wound around the magnetic core 1; Optionally, in this embodiment, in order to improve the uniformity of the distribution of the magnetic adhesive layer 3, magnetic adhesive may be applied in spots at the middle position along the axial direction of the conductive coil 2.

[0057] S2. Apply magnetic adhesive to the conductive coil 2; Optionally, in this embodiment, at least two magnetic adhesives are applied to the conductive coil 2 along the circumference of the magnetic core 1.

[0058] S3. Apply a magnetic field to cause the magnetic adhesive to flow and extend along the circumference of the conductive coil 2;

[0059] S4. Cure the magnetic adhesive to form magnetic adhesive layer 3.

[0060] The inductor manufactured using this method can improve the uniformity of the magnetic adhesive layer 3 distribution, reduce the gap between the magnetic adhesive layer 3 and the outer peripheral surface of the conductive coil 2, as well as the gap within the conductive coil 2, thereby increasing the inductor's permeability and inductance, which is beneficial for miniaturization. Optionally, the application of magnetic adhesive and the application of a magnetic field can be performed simultaneously, or the magnetic field can be applied after the application of magnetic adhesive.

[0061] Optionally, the magnetic core 1 is rotated during at least one of the processes of applying magnetic adhesive to the conductive coil 2 and applying a magnetic field. That is, the magnetic core 1 is rotated during the application of magnetic adhesive to the conductive coil 2; or, the magnetic core 1 is rotated during the application of a magnetic field; or, the magnetic core 1 is rotated during both the application of magnetic adhesive to the conductive coil 2 and the application of a magnetic field. Rotating the magnetic core 1 during the application of magnetic adhesive to the conductive coil 2 allows for application of adhesive to multiple locations around the circumference of the conductive coil 2, improving working efficiency. During the application of a magnetic field, rotating the magnetic core 1 increases the length of the magnetic adhesive extending circumferentially along the conductive coil 2 for a single magnetic adhesive layer, and also achieves a uniform distribution of the magnetic adhesive layer 3 for multiple magnetic adhesive layers spaced apart circumferentially along the conductive coil 2. Rotating the magnetic core 1 during both the application of magnetic adhesive to the conductive coil 2 and the application of a magnetic field further improves working efficiency and achieves a uniform distribution of the magnetic adhesive layer 3.

[0062] Optionally, in one embodiment, during the step of applying the magnetic field, the spiral coil 100 is energized, and the magnetic field generated by the spiral coil 100 causes the magnetic adhesive to flow and extend circumferentially along the conductive coil 2. This arrangement simplifies the structure of the magnetic field application device. Furthermore, the spiral coil 100 extends radially along the inductance; energizing the spiral coil 100 causes the non-uniform magnetic field generated by the spiral coil 100 to cause the magnetic adhesive to flow and extend simultaneously to both ends circumferentially along the conductive coil 2. This arrangement improves working efficiency.

[0063] Optionally, in another embodiment, during the application of the magnetic field, two Helmholtz coils 400 arranged parallel and coaxially are energized. The magnetic field generated by the two Helmholtz coils 400 causes the magnetic adhesive to flow and extend circumferentially along the conductive coil 2. This arrangement generates a uniform magnetic field parallel to the axis of the Helmholtz coils 400 in the region between the two Helmholtz coils 400, and the direction of the magnetic field is tangent to the circumferential direction of the conductive coil 2. This magnetic field guides the magnetic adhesive to flow and extend circumferentially along the conductive coil 2 and is suitable for applications involving high-viscosity magnetic adhesives. Optionally, the two Helmholtz coils 400 are positioned directly opposite the magnetic core 1, and the magnetic field generated by the two Helmholtz coils 400 causes the magnetic adhesive located on both sides of the conductive coil 2 to flow and extend symmetrically simultaneously. Positioning the two Helmholtz coils 400 directly opposite the magnetic core 1, so that both sides of the conductive coil 2 are tangent to the direction of the magnetic field, and causing the magnetic adhesive located on both sides of the conductive coil 2 to flow and extend symmetrically simultaneously, improves working efficiency. Optionally, the two Helmholtz coils 400 are biased relative to the magnetic core 1, that is, not directly opposite the magnetic core 1, so that the magnetic adhesive on one side of the conductive coil 2 extends.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An inductor, characterized in that, include: Magnetic core (1); Conductive coil (2), the conductive coil (2) is wound around the magnetic core (1); A magnetic adhesive layer (3) is wrapped around the conductive coil (2). The magnetic adhesive layer (3) includes at least one magnetic adhesive segment, which is formed by the magnetic adhesive flowing and extending along the circumferential direction of the conductive coil (2) and being cured. The magnetic adhesive segment is in close contact with the outer peripheral surface of the conductive coil (2).

2. The inductor according to claim 1, characterized in that, The magnetic adhesive segment is provided in at least two parts, and the at least two magnetic adhesive segments are distributed along the circumference of the magnetic core (1) and connected in sequence to form the magnetic adhesive layer (3).

3. The inductor according to claim 1, characterized in that, The magnetic adhesive layer (3) includes magnetic particles and colloid, with the magnetic particles uniformly distributed within the colloid.

4. The inductor according to claim 1, characterized in that, The magnetic core (1) includes a magnetic core post (12), and the conductive coil (2) is wound around the magnetic core post (12).

5. The inductor according to claim 4, characterized in that, The magnetic core (1) further includes an upper magnetic core blade (11) and a lower magnetic core blade (13), the upper magnetic core blade (11) and the lower magnetic core blade (13) are respectively disposed at both ends of the magnetic core column (12), and the magnetic adhesive layer (3) is in contact with at least one of the upper magnetic core blade (11) and the lower magnetic core blade (13).

6. The inductor according to claim 5, characterized in that, The upper end of the outer wall of the magnetic adhesive layer (3) extends to connect with the lower edge of the upper magnetic core blade (11), and the lower end of the outer wall of the magnetic adhesive layer (3) extends to connect with the upper edge of the lower magnetic core blade (13).

7. The inductor according to claim 5, characterized in that, The top surface of the conductive coil (2) and the upper magnetic core blade (11) have a first space, and the magnetic adhesive layer (3) extends and fills the first space; and / or, the bottom surface of the conductive coil (2) and the lower magnetic core blade (13) have a second space, and the magnetic adhesive layer (3) extends and fills the second space.

8. The inductor according to claim 5, characterized in that, The cross-sectional area of ​​the upper magnetic core blade (11) is smaller than that of the lower magnetic core blade (13).

9. An apparatus for manufacturing an inductor, characterized in that, Application in manufacturing an inductor as described in any one of claims 1-8, comprising: A clamp (200) is used to hold a magnetic core (1) with a conductive coil (2) wound around it. A dispensing component (300) is used to apply magnetic adhesive to the conductive coil (2); A magnetic field applicator is used to apply a magnetic field to cause the magnetic adhesive to flow and extend circumferentially along the conductive coil (2).

10. The inductor manufacturing apparatus according to claim 9, characterized in that, The magnetic field applying element is a spiral coil (100), or the magnetic field applying element is two Helmholtz coils (400) arranged in parallel and coaxially, and the magnetic core (1) is located between the two Helmholtz coils (400), and the axis of the Helmholtz coil (400) is perpendicular to the axis of the magnetic core (1).

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