Inductor

Abstract

The utility model provides an inductor. The inductor comprises a magnetic shielding shell, a primary coil, a secondary coil and a magnetism isolating ring. The magnetic shielding shell is provided with a mounting cavity and a magnetic core arranged in the mounting cavity; the primary coil and the secondary coil are both arranged in the installation cavity, the magnetic shielding shell provides physical protection for the inductor, more importantly, the magnetic shielding shell can effectively isolate an external interference magnetic field, and stability and purity of the magnetic field in the inductor are guaranteed. And the magnetic core is used as a magnetic conductive medium of an inductance effect, so that the primary coil and the secondary coil are sleeved on the magnetic core and are sequentially arranged along the axis direction of the magnetic core to form the inductance effect. The magnetic isolation ring is arranged on the magnetic core in a sleeving mode and located between the primary coil and the secondary coil, so that mutual interference of magnetic fields between the primary coil and the secondary coil is effectively avoided, and the electromagnetic performance and the magnetic field stability of the inductor are further improved.

Description

Technical Field

[0001] The present application belongs to the technical field of inductors, and more specifically, relates to an inductor. Background Art

[0002] With the rapid development of electronic technology, integrated circuits, as core components of modern electronic devices, have a performance and stability that directly impacts the overall system efficiency and reliability. The continuous evolution of electronic products toward miniaturization, higher performance, and greater integration places ever-more stringent demands on the components that make up these circuits. Inductors, as an essential component in circuits, are primarily used for energy storage, filtering, oscillation, and signal transmission, and their characteristics directly impact the overall performance of the circuit.

[0003] In some applications, such as portable electronic devices, high-frequency communication modules, automotive electronic systems, and high-performance computing platforms, the requirements for inductors are particularly stringent. These applications require inductors not only to have excellent electrical performance, such as high Q (quality factor) and low loss, but also to have magnetic shielding to reduce electromagnetic interference and ensure signal transmission purity and system stability.

[0004] However, traditional inductors have limitations in meeting all of these requirements. For example, while traditional wound inductors offer good current handling capabilities, they are bulky, making them difficult to integrate into systems. Thin-film inductors, while compact, often suffer from significant heat generation and high DCR when handling high currents. Furthermore, inductors lacking effective magnetic shielding can easily become sources or victims of electromagnetic interference, impacting the electromagnetic compatibility of the entire system. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide an inductor to solve the technical problem of poor magnetic shielding effect of the inductor in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is:

[0007] An inductor is provided, comprising:

[0008] A magnetic shielding shell having a mounting cavity and a magnetic core arranged in the mounting cavity;

[0009] The primary coil and the secondary coil are both arranged in the mounting cavity, and the primary coil and the secondary coil are both sleeved on the magnetic core and arranged in sequence along the axis direction of the magnetic core;

[0010] The magnetic isolation ring is sleeved on the magnetic core and located between the primary coil and the secondary coil.

[0011] As a further improvement of the above technical solution:

[0012] Optionally, the primary coil and the secondary coil are both formed by winding flat enameled wire in a spiral direction.

[0013] Optionally, both ends of the primary coil are first end electrodes, and the first end electrodes are led out from the main body of the primary coil and then bent along the axis direction of the primary coil;

[0014] Both ends of the secondary coil are second end electrodes. The second end electrodes are led out from the main body of the secondary coil and then bent along the axis direction of the secondary coil.

[0015] Optionally, a conductive coating is provided on both the first end electrode and the second end electrode.

[0016] Optionally, the conductive coating includes a conductive middle layer and a conductive outer layer, the conductive middle layer is plated on the copper substrate of the first end electrode and the second end electrode, and the conductive outer layer is plated on the conductive middle layer.

[0017] Optionally, the conductive middle layer is a nickel-plated layer, and the conductive outer layer is a tin-plated / lead-plated layer.

[0018] Optionally, the two first end electrodes of the primary coil are located on the same side of the magnetic shielding shell, the two second end electrodes of the secondary coil are located on the same side of the magnetic shielding shell, and the first end electrode and the second end electrode are respectively located on both sides of the magnetic shielding shell.

[0019] Optionally, the magnetic shielding shell is a soft ferrite shell.

[0020] Optionally, the inductor further includes a bottom plate, which is disposed at the bottom of the magnetic shielding shell and together with the magnetic shielding shell forms a mounting cavity.

[0021] The beneficial effects of the inductor provided by this application are:

[0022] The inductor provided in the present application includes a magnetic shielding shell, a primary coil, a secondary coil and a magnetic isolation ring. Among them, the magnetic shielding shell has a mounting cavity and a magnetic core arranged in the mounting cavity; the primary coil and the secondary coil are both arranged in the mounting cavity. The magnetic shielding shell not only provides physical protection for the inductor, but more importantly, it can effectively isolate the external interference magnetic field and ensure the stability and purity of the magnetic field inside the inductor. The magnetic core serves as a magnetic conductive medium for the inductive effect. Therefore, the primary coil and the secondary coil are both sleeved on the magnetic core and arranged in sequence along the axial direction of the magnetic core to form an inductive effect. The magnetic isolation ring is sleeved on the magnetic core and is located between the primary coil and the secondary coil, thereby effectively avoiding mutual interference between the magnetic fields of the primary coil and the secondary coil, thereby further improving the electromagnetic performance and magnetic field stability of the inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic cross-sectional view of the inductor provided in this application;

[0025] Figure 2 This is a schematic diagram of the main structure of the inductor provided in this application;

[0026] Figure 3 A schematic side view of the inductor provided in this application;

[0027] Figure 4 A schematic diagram of the three-dimensional structure of the inductor provided in this application;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the primary coil and secondary coil of the inductor provided in this application.

[0029] Among them, the reference numerals in the figures are:

[0030] 1. Magnetic shielding shell; 11. Installation cavity;

[0031] 12. Magnetic core; 2. Primary coil;

[0032] 21. First end electrode; 3. Secondary coil;

[0033] 31. Second end electrode; 4. Magnetic isolation ring;

[0034] 5. Base plate. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0038] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can 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 the disclosure of this utility model.

[0041] In the following description, suffixes such as "module", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meaning. Therefore, they can be used interchangeably.

[0042] The present invention will be further described in detail below through specific implementations in conjunction with the accompanying drawings.

[0043] like Figures 1 to 4 As shown, the present application provides an inductor, comprising a magnetic shielding shell 1 , a primary coil 2 , a secondary coil 3 and a magnetic isolation ring 4 .

[0044] Among them, the magnetic shielding shell 1 has a mounting cavity 11 and a magnetic core 12 arranged in the mounting cavity 11; the primary coil 2 and the secondary coil 3 are both arranged in the mounting cavity 11. The magnetic shielding shell 1 not only provides physical protection for the inductor, but more importantly, it can effectively isolate the external interference magnetic field and ensure the stability and purity of the magnetic field inside the inductor. The magnetic core 12 serves as a magnetic conductive medium for the inductance effect. Therefore, the primary coil 2 and the secondary coil 3 are both sleeved on the magnetic core 12 and arranged in sequence along the axial direction of the magnetic core 12, thereby forming an inductance effect. In order to further optimize the performance of the inductor of the present application, a magnetic isolation ring 4 is also provided. The magnetic isolation ring 4 is sleeved on the magnetic core 12 and is located between the primary coil 2 and the secondary coil 3, thereby effectively avoiding mutual interference between the magnetic fields of the primary coil 2 and the secondary coil 3, thereby further improving the electromagnetic performance and magnetic field stability of the inductor.

[0045] like Figure 5 As shown, in a specific embodiment of the present application, the primary coil 2 and the secondary coil 3 are both formed by winding flat enameled wire in a spiral direction.

[0046] When winding the primary coil 2 and secondary coil 3, the leads are first fixed, and then the tail wires are moved independently to complete the winding process. This results in a high degree of elasticity in the coils after winding, which can easily cause them to loosen and damage them during the encapsulation resin. To address these issues, flat enameled wire not only requires high insulation properties but also self-adhesiveness to ensure a tight fit during winding and prevent them from loosening. The selection of flat enameled wire must meet the following key indicators: the surface elongation must be greater than 15% to ensure that it has sufficient flexibility and ductility during the winding process; the material must be not easy to break to improve the durability of the coil; good windability is convenient for efficient winding in a limited space; after winding, the surface enamel film should remain intact, without cracking and copper exposure to ensure its insulation performance; the insulation properties must reach an excellent level, and the surface insulation withstand voltage must exceed 1600V to ensure the safe operation of the coil in a high-voltage environment; the number of pinholes should be strictly controlled, less than 5, to reduce the risk of current leakage; in addition, it must also have high temperature resistance, and the temperature of the softening breakdown test should be greater than 300°C to ensure the long-term stable operation of the coil in a high-temperature environment.

[0047] Within a limited space, enameled wires are tightly packed to maximize space utilization. Compared to round enameled wires, flat wires can better utilize the limited winding space. Their larger surface area also helps conduct and dissipate heat, allowing them to withstand higher currents.

[0048] like Figure 5 As shown, in a specific embodiment of the present application, the two ends of the primary coil 2 are first end electrodes 21. After being led out from the main body of the primary coil 2, the first end electrode 21 is bent along the axis of the primary coil 2 at an angle of approximately 90°. This ensures a good fit and stable connection between the electrode and subsequent connecting components or circuit boards, while optimizing the compactness and space utilization of the overall structure. Correspondingly, the two ends of the secondary coil 3 are second end electrodes 31. After being led out from the main body of the secondary coil 3, the second end electrode 31 is bent along the axis of the secondary coil 3 at an angle of approximately 90°. This ensures a good fit and stable connection between the electrode and subsequent connecting components or circuit boards, while optimizing the compactness and space utilization of the overall structure.

[0049] In a specific embodiment of the present application, a conductive coating is provided on both the first end electrode 21 and the second end electrode 31, thereby improving the conductive efficiency and welding ability of the first end electrode 21 and the second end electrode 31. Before applying the conductive coating, the paint on the first end electrode 21 and the second end electrode 31 must be removed. A laser stripping method can be used. According to different wire diameters, the pulse and pulse width of the laser equipment can be adjusted to achieve a suitable energy value. Laser stripping uses high-energy laser pulses to locally heat the material in a small area. The paint film on the surface of the lead wire vaporizes under high temperature conditions, ensuring that the paint film is destroyed without damaging the copper wire inside the enameled wire. At the same time, the peeling area can also be controlled. Finally, a conductive coating is plated on the first end electrode 21 and the second end electrode 31 from which the paint film has been removed.

[0050] In a specific embodiment of the present application, the conductive coating specifically includes a conductive middle layer and a conductive outer layer to further improve the conductivity and welding reliability of the first terminal electrode 21 and the second terminal electrode 31. The conductive middle layer is plated on the copper substrate of the first terminal electrode 21 and the second terminal electrode 31.

[0051] The copper substrate, as the main part of the electrode, already has good electrical conductivity. However, in order to further improve its electrical conductivity and corrosion resistance, a material with high conductivity, good corrosion resistance and excellent adhesion is selected as the conductive middle layer. It is evenly covered on the surface of the copper substrate to form a continuous and dense conductive layer, thereby effectively improving the electrical conductivity and durability of the electrode.

[0052] A conductive outer layer is applied over the conductive middle layer. This outer layer utilizes a different material than the conductive middle layer, yet possesses the same high conductivity and excellent welding properties. This not only further enhances the electrode's electrical conductivity but also optimizes its welding performance. The conductive outer layer acts as a bridge between the electrode and the solder, promoting solder wetting and diffusion, resulting in a stronger and more reliable solder joint. Furthermore, the conductive outer layer protects the conductive middle layer from environmental corrosion, extending the electrode's service life.

[0053] In a specific embodiment of the present application, the conductive middle layer is a nickel-plated layer, and the conductive outer layer is a tin-plated / lead-plated layer.

[0054] like Figures 1 to 4As shown, in a specific embodiment of the present application, the two first end electrodes 21 of the primary coil 2 are located on the same side of the magnetic shielding shell 1, and the two second end electrodes 31 of the secondary coil 3 are located on the same side of the magnetic shielding shell 1. The first end electrode 21 and the second end electrode 31 are respectively located on both sides of the magnetic shielding shell 1. This not only ensures a reasonable and compact spatial layout between the electrodes and between the electrodes and the magnetic shielding shell, but also further optimizes the overall performance and stability of the circuit system. By arranging the first end electrode 21 and the second end electrode 31 on both sides of the magnetic shielding shell 1, we can effectively reduce electromagnetic interference between the electrodes and improve the anti-interference capability of the circuit system. At the same time, this layout also helps to achieve convenient and stable connection between the electrodes and external circuits or connectors, thereby ensuring that the circuit system can operate normally and efficiently.

[0055] In one embodiment of the present application, the magnetic shielding housing 1 is a soft ferrite housing. As a magnetic material, soft ferrite has high resistivity, low loss, good temperature stability, and is also easy to process and shape. This magnetic shielding housing 1 can effectively absorb, guide, and shield external electromagnetic interference, providing a relatively pure and stable electromagnetic environment for the internal electronic components and circuits, thereby improving the performance of the entire electronic device and extending its service life.

[0056] like Figures 1 to 4 As shown, in a specific embodiment of the present application, the inductor further includes a bottom plate 5. The bottom plate 5 is also made of soft ferrite. The bottom plate 5 is bonded to the bottom of the magnetic shielding housing 1 and together with the magnetic shielding housing 1, forms a mounting cavity 11.

[0057] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An inductor, characterized in that: include: A magnetic shielding shell (1) having a mounting cavity (11) and a magnetic core (12) disposed in the mounting cavity (11); The primary coil (2) and the secondary coil (3) are both arranged in the mounting cavity (11); the primary coil (2) and the secondary coil (3) are both sleeved on the magnetic core (12) and arranged in sequence along the axial direction of the magnetic core (12); The magnetic isolation ring (4) is sleeved on the magnetic core (12) and located between the primary coil (2) and the secondary coil (3).

2. The inductor according to claim 1, wherein The primary coil (2) and the secondary coil (3) are both formed by winding flat enameled wire in a spiral direction.

3. The inductor according to claim 1, wherein Both ends of the primary coil (2) are first end electrodes (21), and the first end electrodes (21) are led out from the main body of the primary coil (2) and bent along the axial direction of the primary coil (2); The two ends of the secondary coil (3) are second end electrodes (31), and the second end electrodes (31) are led out from the main body of the secondary coil (3) and then bent along the axial direction of the secondary coil (3).

4. The inductor according to claim 3, wherein The first end electrode (21) and the second end electrode (31) are both provided with a conductive coating.

5. The inductor according to claim 4, wherein The conductive coating comprises a conductive middle layer and a conductive outer layer, the conductive middle layer is plated on the copper substrate of the first end electrode (21) and the second end electrode (31), and the conductive outer layer is plated on the conductive middle layer.

6. The inductor according to claim 5, wherein The conductive middle layer is a nickel-plated layer, and the conductive outer layer is a tin-plated / lead-plated layer.

7. The inductor according to claim 3, wherein The two first end electrodes (21) of the primary coil (2) are located on the same side of the magnetic shielding shell (1), the two second end electrodes (31) of the secondary coil (3) are located on the same side of the magnetic shielding shell (1), and the first end electrode (21) and the second end electrode (31) are respectively located on both sides of the magnetic shielding shell (1).

8. The inductor according to any one of claims 1 to 7, wherein: The magnetic shielding shell (1) is a soft ferrite shell.

9. The inductor according to any one of claims 1 to 7, wherein: It also includes a bottom plate (5), which is arranged at the bottom of the magnetic shielding shell (1) and is enclosed together with the magnetic shielding shell (1) to form an installation cavity (11).

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