Inductance device

Abstract

The embodiment of the utility model provides an inductance device. The inductance device comprises a coil and an outer magnetic core, wherein the outer magnetic core wraps at least part of the coil, one end of the coil is led in from one end of the outer magnetic core, and the other end of the coil is led out from the other end of the outer magnetic core. According to the scheme, the outlet and the inlet of the coil are formed in the different ends of the outer magnetic core, the inductance value of the inductance device can be increased, the outer magnetic core can gather and guide magnetic lines, and therefore the inductance value of the inductance device is increased under the condition that the inner magnetic core is not arranged, and radiation electromagnetic interference of the inductance device is reduced.

Description

Technical Field

[0001] This application relates to the field of electronic devices, and more particularly to an inductor device. Background Technology

[0002] An inductor is a passive electronic component, primarily composed of coils, used to store energy and generate a magnetic field in a circuit. It produces an induced electromotive force (EMF) when the current changes, resisting these changes. Inductors are widely used in various electronic circuits, especially in applications such as filtering, energy storage, and signal processing.

[0003] One inductor structure consists of a cylindrical magnetic core and a coil surrounding the core. In this design, the magnetic core is not closed, which allows for higher resistance to saturation. However, the magnetic lines of force generated by the coil can penetrate the core and emit into space, causing radiated electromagnetic interference (EMI) that can affect the operation of other electronic devices. Therefore, the current challenge is to reduce the radiated EMI of inductor devices. Summary of the Invention

[0004] This application provides an inductor device to reduce radiated electromagnetic interference.

[0005] In a first aspect, embodiments of this application provide an inductor device, the device comprising: a coil and an outer magnetic core; wherein, the outer magnetic core encloses at least a portion of the coil, one end of the coil is introduced from one end of the outer magnetic core, and the other end of the coil is led out from the other end of the outer magnetic core.

[0006] In one possible implementation, the outer magnetic core is an open ring-shaped body, and the outer magnetic core includes a first winding section, a second winding section and a connecting section; one end of the coil is wound around the first winding section and the other end of the coil is wound around the second winding section; the connecting section connects the first winding section and the second winding section, and the ends of the first winding section and the second winding section that are away from the connecting section are close to each other and have a gap.

[0007] In one possible implementation, the outer magnetic core is square.

[0008] In one possible implementation, the outer magnetic core is arc-shaped.

[0009] In one possible implementation, the outer magnetic core is a hollow structure; the main body of the coil is located inside the hollow structure, one end of the coil is introduced from one end of the hollow structure, and the other end of the coil is led out from the other end of the hollow structure.

[0010] In one possible implementation, the outer magnetic core is a hollow cylinder.

[0011] In one possible implementation, the device further includes a support column that passes through the coil along the central axis of the coil.

[0012] In one possible implementation, the support column is made of an insulating and thermally conductive material.

[0013] In one possible implementation, the device further includes an inner magnetic core, the central axis of which passes through the coil.

[0014] In one possible implementation, the inner magnetic core is made of a magnetic material.

[0015] In one possible implementation, a gap exists between the coil and the outer magnetic core.

[0016] In one possible implementation, a filler is placed between the coil and the outer magnetic core.

[0017] In one possible implementation, the filler is a fixative adhesive.

[0018] In one possible implementation, the fixing adhesive includes thermally conductive adhesive and / or magnetically conductive adhesive.

[0019] In one possible implementation, the filler includes magnetic material particles and / or silicone particles.

[0020] The inductor device provided in this application includes a coil and an outer magnetic core. The outer magnetic core encloses at least a portion of the coil, with one end of the coil introduced into the outer magnetic core and the other end leading out from the other end of the outer magnetic core. In this example, placing the coil's inlet and outlet at different ends of the outer magnetic core increases the inductance of the inductor device. Furthermore, the outer magnetic core can gather and guide magnetic lines of force, thereby enhancing the inductance of the inductor device and reducing radiated electromagnetic interference without the need for an inner magnetic core. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a schematic diagram of the structure of the inductor provided in this application;

[0023] Figure 2 This is a schematic diagram of the structure of the inductor provided in this application;

[0024] Figure 3 This is a schematic diagram of the structure of the inductor provided in this application;

[0025] Figure 4 A schematic diagram of the structure of the inductor provided in this application.

[0026] Explanation of reference numerals in the attached drawings: coil 10, outer magnetic core 20, support column 30, inner magnetic core 40, first winding section 21, second winding section 22.

[0027] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to be omnipresent but not exclusive. For example, a product or device that comprises a series of components is not necessarily limited to those components that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such products or devices. The term "module" as used in this application refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code capable of performing the functions associated with that element.

[0030] An inductor, a fundamental electronic component, is primarily composed of coils and is used to store energy and generate a magnetic field in a circuit. Its basic working principle is to store energy using the magnetic field generated when current flows through the coil. When the current changes, the inductor generates an induced electromotive force (EMF) to resist the change in current, according to Faraday's law of electromagnetic induction. Inductors are widely used in filtering, energy storage, and signal processing circuits. For example, they are used in power supply filters to smooth current and reduce noise, as energy storage elements in switching power supplies, and in radio and communication equipment in combination with capacitors to form oscillating circuits for signal tuning and processing.

[0031] One inductor structure consists of a cylindrical magnetic core and a coil surrounding the core. The magnetic core in this design is not closed; this open design provides high resistance to saturation because the open structure of the core allows the magnetic field to remain relatively stable even at high currents. However, a significant drawback of this design is that magnetic field lines generated by the coil extend out of the core and into space, causing radiated electromagnetic interference (EMI). This radiated EMI can adversely affect the normal operation of other electronic devices, leading to signal distortion, increased noise, and even potential equipment malfunction. Therefore, a current challenge is to reduce the radiated EMI of inductor devices.

[0032] The technical content provided in this application aims to solve the aforementioned technical problems in related technologies. The inductor device of this application includes: a coil and an outer magnetic core; wherein the outer magnetic core encloses at least a portion of the coil, one end of the coil is introduced into the outer magnetic core, and the other end of the coil is led out from the other end of the outer magnetic core. In this example, placing the coil's inlet and outlet at different ends of the outer magnetic core increases the inductance of the inductor device, and the outer magnetic core can gather and guide magnetic lines of force, thereby enhancing the inductance of the inductor device and reducing radiated electromagnetic interference without the need for an inner magnetic core.

[0033] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0034] Example 1

[0035] The inductor device in this example includes: a coil 10 and an outer magnetic core 20;

[0036] The outer magnetic core 20 encloses at least part of the coil 10, with one end of the coil 10 introduced from one end of the outer magnetic core 20 and the other end of the coil 10 led out from the other end of the outer magnetic core 20.

[0037] In this example, coil 10 is a solenoid-shaped coil. In practical applications, coil 10 can be formed by winding one or more independent wires. The material of the outer magnetic core 20 in this example can be any magnetic material such as ferrite, silicon steel sheet, or metal alloy; no limitation is made here. The outer magnetic core 20 guides and gathers the magnetic lines of force outside coil 10 in the magnetic field generated by coil 10 when energized. It is understood that when the outer magnetic core 20 is not provided, the medium for conducting the magnetic lines of force outside coil 10 is air; when the outer magnetic core 20 is provided, because the permeability of the outer magnetic core 20 is much greater than that of air, the magnetic lines of force outside coil 10 all pass through the outer magnetic core 20 from one end of coil 10 to the other, thus achieving the effect of shielding the electromagnetic interference radiated from coil 10 to other circuits and electronic components. In this example, the outer magnetic core 20 is a medium that gathers and conducts the external magnetic lines of force, and the shape of the outer magnetic core 20 can be defined as coinciding with and aligned with the external magnetic lines of force. In practical applications, the outer magnetic core 20 can have various shapes, such as being wrapped in a cylindrical shape or in a semi-cylindrical shape. Optionally, the outer magnetic core 20 can also be a strip with an arc-shaped outline, wherein one end of the strip corresponds one-to-one with one end of the coil 10.

[0038] The structure of the related inductor consists of an outer magnetic core 20 and an inner magnetic core. A coil 10 is introduced from one end, wound around the inner magnetic core, and led out from the same end. The outer magnetic core 20 is used to shield the radiated electromagnetic interference of the coil 10, while the inner magnetic core is used to enhance the inductance. In this example, the structure of the coil 10 and outer magnetic core 20—that is, one end of the coil 10 is introduced from one end of the outer magnetic core 20, and the other end of the coil 10 is led out from the other end of the outer magnetic core 20—allows the outer magnetic core 20 to both shield the radiated electromagnetic interference of the coil 10 and enhance the inductance of the related inductor. Therefore, the structure of the coil 10 and outer magnetic core 20 in this example eliminates the need for an inner magnetic core, thus reducing the cost of the inductor, while the outer magnetic core 20 still achieves the function of enhancing the inductance.

[0039] This example of an inductor includes a coil and an outer magnetic core. The outer magnetic core encloses at least a portion of the coil, with one end of the coil introduced into the outer magnetic core and the other end of the coil exiting from the other end of the outer magnetic core. This example's solution increases the inductance of the inductor by placing the coil's inlet and outlet at different ends of the outer magnetic core. Furthermore, the outer magnetic core can gather and guide magnetic lines of force, thereby enhancing the inductance of the inductor and reducing radiated electromagnetic interference without the need for an inner magnetic core.

[0040] As another example, the outer magnetic core 20 is an annular body with an opening, and the outer magnetic core 20 includes a first winding section 21, a second winding section 22 and a connecting section;

[0041] One end of the coil 10 is wound around the first winding section 21, and the other end of the coil 10 is wound around the second winding section 22; the connecting section connects the first winding section 21 and the second winding section 22, and the ends of the first winding section 21 and the second winding section 22 that are away from the connecting section are close to each other and have a gap.

[0042] In this example, the outer magnetic core 20 is an open ring-shaped body. The cross-sectional shape of the ring-shaped body is not limited in this example; for example, it can be circular or square. Furthermore, the outline shape of the ring-shaped body is not limited in this example; for example, it can be an open square or circular, "C"-shaped, or "U"-shaped shape. In this example, the ends of the first winding segment 21 and the second winding segment 22 that are away from the connecting segment are close to each other and have a gap, which is the opening of the ring-shaped body. The first winding segment 21 and the second winding segment 22 are used to wind and fix one end and the other end of the coil 10. If the first winding segment 21 and the second winding segment 22 are not connected within the coil 10, they cannot conduct the magnetic field lines inside the coil 10; they can only support and fix the coil 10. For example, this example does not limit the orientation of the first winding segment 21, the second winding segment 22, and the connecting segment. It should be noted that the distribution of the connecting segments connecting the first winding segment 21 and the second winding segment 22 should be arranged along the external magnetic field lines of the coil 10. The device in this example, by setting the outer magnetic core 20 as an open ring, makes it easier to install and adjust the coil 10, and reduces the manufacturing cost of the outer magnetic core 20.

[0043] As yet another example, Figure 1 The figure shows a schematic diagram of an inductor device, where the outer magnetic core 20 is square.

[0044] For example, the outline shape of the outer magnetic core 20 can be a square with three sides of equal length and one side open, or a rectangle with an opening on the long side. In this example, by setting the outer magnetic core 20 to a square shape, the manufacturing process of the outer magnetic core 20 can be simplified and the manufacturing cost of the outer magnetic core 20 can be reduced.

[0045] As yet another example, the outer magnetic core 20 in the inductor is arc-shaped.

[0046] The outline shape of the exemplary outer magnetic core 20 can be a perfectly circular or elliptical shape with an opening. Optionally, the outline shape of the outer magnetic core 20 can also be set to a "C" shape, or a custom shape composed of arcs of different sizes for the first winding segment 21, the second winding segment 22, and the connecting segment, depending on actual needs. The solution in this example allows for flexible configuration of the shape of the outer magnetic core 20, thereby improving the application scenarios of the inductor device.

[0047] As another example, the outer magnetic core 20 is a hollow structure; the main body of the coil 10 is located inside the hollow structure, one end of the coil 10 is introduced from one end of the hollow structure, and the other end of the coil 10 is led out from the other end of the hollow structure.

[0048] For example, the outer magnetic core 20 in this example can be a hollow sphere or cylinder. This example solution effectively utilizes space to allow the coil 10 to be tightly coupled to the magnetic core, thereby improving the magnetic coupling efficiency and overall performance of the inductor.

[0049] As yet another example, Figure 2 The diagram illustrates the structure of an inductor, in which the outer magnetic core 20 is a hollow cylinder.

[0050] As shown in the figure Figure 2 The left side is a front view of the inductor. Figure 2 The right side shows a top view of the inductor. In this example, by providing an outer magnetic core 20 in the form of a hollow cylinder, a closed magnetic circuit can be provided, thereby reducing magnetic flux leakage and improving the energy transfer efficiency and electromagnetic compatibility of the inductor.

[0051] As yet another example, Figure 3 The diagram illustrates a schematic of an inductor device, which also includes a support post 30 that passes through the coil 10 along the central axis of the coil 10.

[0052] In this example, the support column 30 provides a robust support structure for the coil 10, helping to maintain the shape and position of the coil 10 and preventing it from deforming or moving during operation due to vibration or other mechanical stress.

[0053] As yet another example, the support column 30 is made of an insulating and thermally conductive material.

[0054] In this example, the support post 30 can be made of insulating and thermally conductive materials such as silicone, ceramic, or plastic. By using the insulating and thermally conductive support post 30, this example helps dissipate heat from the coil 10 while ensuring its normal operation, thereby improving the thermal stability and reliability of the inductor.

[0055] As yet another example, Figure 4 The diagram illustrates a schematic of an inductor device, which also includes an inner magnetic core 40, the central axis of which passes through the coil 10.

[0056] In this example, the inner magnetic core 40 can increase the inductance of the inductor by increasing the permeability of the magnetic circuit, thereby enabling the coil 10 to generate a higher inductance under the same number of turns and current conditions. On the other hand, the inner magnetic core 40, combined with the outer magnetic core 20, can further reduce the radiated electromagnetic interference of the inductor. It should be noted that, in conjunction with the above example, the inner magnetic core 40 and the support column 30 can also be simultaneously provided inside the coil 10.

[0057] As yet another example, the inner magnetic core 40 is made of magnetic material.

[0058] The magnetic material in this example can be ferrite, silicon steel, amorphous material, iron powder core, or nickel-iron alloy, etc. The inner magnetic core 40 made of magnetic material in this example can concentrate and enhance the magnetic field strength inside the coil 10, thereby enabling the inductor to achieve a stronger magnetic field in a smaller volume, thus improving efficiency and performance.

[0059] As yet another example, there is a gap between coil 10 and outer magnetic core 20.

[0060] For example, when an inner magnetic core or support post is present, there is also a gap between the inner magnetic core or support post and the coil. In this example, the gap between the coil 10 and the outer magnetic core 20 can reduce the risk of the magnetic core reaching saturation, and by adjusting the size of the gap, the inductance value of the inductor can be precisely controlled.

[0061] As yet another example, there is filler material between coil 10 and outer magnetic core 20.

[0062] For example, when an inner magnetic core or support post is present, the space between the inner magnetic core or support post and the coil is also filled with filler. In this example, the filler between coil 10 and outer magnetic core 20 can be determined according to the specific application requirements, such as thermal management, electrical insulation, mechanical strength, environmental conditions, and cost. The solution in this example, through the filler material, can improve the performance and reliability of the inductor.

[0063] As yet another example, the filler is a fixing adhesive.

[0064] In practical applications, the fixing adhesive can be epoxy resin to enhance structural integrity while protecting coil 10 from moisture, dust and chemicals; or the fixing adhesive can be polyurethane foam to reduce the impact of mechanical vibration and shock on coil 10 and magnetic core.

[0065] As yet another example, the fixing adhesive includes thermally conductive adhesive and / or magnetically conductive adhesive.

[0066] In practical applications, thermally conductive adhesive, magnetic adhesive, or a combination of both can be injected between the coil 10 and the outer magnetic core 20, depending on the actual needs, to achieve the corresponding thermal management and magnetic field conduction functions.

[0067] As yet another example, the filler includes magnetic material particles and / or silicone particles.

[0068] In practical applications, the area between the coil 10 and the outer magnetic core 20 can be sealed to accommodate magnetic material particles or silicone particles. Optionally, adhesive can also be used to fix the magnetic material particles or silicone particles. In this example, the magnetic core particles enable magnetic field conduction, and the silicone particles increase the heat dissipation performance of the inductor.

[0069] The inductor device of this embodiment includes a coil and an outer magnetic core. The outer magnetic core encloses at least a portion of the coil, with one end of the coil introduced into the outer magnetic core and the other end leading out from the other end of the outer magnetic core. In this example, placing the coil's inlet and outlet at different ends of the outer magnetic core increases the inductance of the inductor device. Furthermore, the outer magnetic core can gather and guide magnetic lines of force, thereby enhancing the inductance of the inductor device and reducing radiated electromagnetic interference without the need for an inner magnetic core.

[0070] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An inductor device, characterized in that, The device includes: a coil and an outer magnetic core; The outer magnetic core encloses at least a portion of the coil, with one end of the coil introduced from one end of the outer magnetic core and the other end of the coil led out from the other end of the outer magnetic core.

2. The apparatus according to claim 1, characterized in that, The outer magnetic core is an annular body with an opening, and the outer magnetic core includes a first winding section, a second winding section, and a connecting section; One end of the coil is wound around the first winding segment, and the other end of the coil is wound around the second winding segment; the connecting segment connects the first winding segment and the second winding segment, and the ends of the first winding segment and the second winding segment that are away from the connecting segment are close to each other and have a gap.

3. The apparatus according to claim 2, characterized in that, The outer magnetic core is square.

4. The apparatus according to claim 2, characterized in that, The outer magnetic core is arc-shaped.

5. The apparatus according to claim 1, characterized in that, The outer magnetic core has a hollow structure; The main body of the coil is located inside the hollow structure, one end of the coil is introduced from one end of the hollow structure, and the other end of the coil is led out from the other end of the hollow structure.

6. The apparatus according to claim 5, characterized in that, The outer magnetic core is a hollow cylinder.

7. The apparatus according to claim 5, characterized in that, The device also includes a support column that passes through the coil along the central axis of the coil.

8. The apparatus according to claim 7, characterized in that, The support column is made of insulating and thermally conductive material.

9. The apparatus according to claim 5, characterized in that, The device also includes an inner magnetic core, the central axis of which passes through the coil.

10. The apparatus according to claim 9, characterized in that, The inner magnetic core is made of magnetic material.

11. The apparatus according to any one of claims 1 to 10, characterized in that, There is a gap between the coil and the outer magnetic core.

12. The apparatus according to any one of claims 1 to 10, characterized in that, A filler is provided between the coil and the outer magnetic core.

13. The apparatus according to claim 12, characterized in that, The filler is a fixing adhesive.

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