Inductor element

Abstract

The invention relates to the technical field of electrical elements, and particularly discloses an inductance element which comprises a magnetic core, an electric lead and a magnetic plastic package layer. Wherein the magnetic core comprises a winding part of a columnar structure; the conductor wire comprises at least two strands of core wires arranged in parallel and a first insulating layer wrapping the peripheries of all the core wires, and the conductor wire is wound on the winding part; the cross section of the conductive wire is polygonal, and the cross section of the core wire is polygonal; the magnetic plastic packaging layer wraps the peripheries of the conductive wire and the winding part, the two leading-out ends of the conductive wire are respectively connected with an electrode, and the two electrodes are both located outside the magnetic plastic packaging layer. The cross section of the conductor wire formed by the multiple strands of core wires is polygonal, and the shape of the cross section of each core wire is polygonal, so that space is saved while the skin effect is improved; in addition, in the compression molding process, the conductor wire of the polygonal structure cannot deform, and the risk of short circuit is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical components, and in particular to an inductor component. Background Art

[0002] With the development of Internet technology, the requirements for the integration and miniaturization of electronic products are becoming increasingly higher. At the same time, the overall requirements for power inductors include miniaturization, high frequency and low cost.

[0003] In order to improve the skin effect, existing power inductors use multiple strands of round copper wires combined into one to increase the surface area. However, round copper wires take up a lot of space, which is not conducive to their application in small-sized products or scenarios with insufficient design space. In addition, during the pressing process, the round copper wires will deform, which may cause the risk of short circuit.

[0004] Therefore, it is urgent to study an inductor element to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an inductor element to solve the problem in the prior art that the inductor element occupies a large space and is easily deformed and causes a short circuit.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] Inductive components, including:

[0008] A magnetic core; the magnetic core comprises a winding portion in a columnar structure;

[0009] A conductive wire, the conductive wire comprising at least two core wires arranged in parallel and a first insulating layer wrapped around the outer circumference of all the core wires, the conductive wire being wound around the winding portion; the cross-section of the conductive wire being in the shape of a polygon, and the cross-section of the core wire being in the shape of a polygon;

[0010] The magnetic plastic packaging layer is wrapped around the conductive wire and the outer periphery of the winding portion. The two lead-out ends of the conductive wire are respectively connected to an electrode, and the two electrodes are both located outside the magnetic plastic packaging layer.

[0011] As an optional technical solution of the inductor element, the cross-section of the conductive wire is rectangular.

[0012] As an optional technical solution of the inductor element, the width direction of the conductive wire is perpendicular or parallel to the axial direction of the winding portion.

[0013] As an optional technical solution of the inductor element, the ratio of the length to the width of the cross section of the conductive wire is between 1.6:1 and 8:1.

[0014] As an optional technical solution of the inductor element, the corners of the cross section of the conductive wire are rounded.

[0015] As an optional technical solution of the inductor element, the cross section of the core wire is rectangular;

[0016] And / or, the core wire includes a copper wire and a second insulating layer wrapped around the outer circumference of the copper wire.

[0017] As an optional technical solution of the inductor element, the corners of the cross section of the core wire are rounded.

[0018] As an optional technical solution of the inductor element, the ratio of the length to the width of the cross section of the core wire is between 1.6:1 and 8:1;

[0019] And / or, the conductive wire includes four core wires, the four core wires are arranged in two rows and two columns, and the width direction of each core wire is the same as the width direction of the conductive wire.

[0020] As an optional technical solution of the inductor element, the magnetic core includes a bearing portion, the bearing portion is located at the lower end of the winding portion, and the outer diameter of the bearing portion is greater than the outer diameter of the winding portion.

[0021] As an optional technical solution of the inductor element, the magnetic plastic encapsulation layer is molded or prepared by gluing.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides an inductor element, which comprises a magnetic core, a conductive wire wound around the outer periphery of a winding portion of the magnetic core, and a magnetic plastic packaging layer wrapped around the magnetic core and the conductive wire; wherein the conductive wire comprises at least two parallel core wires, and the cross section of the conductive wire is a polygon, and the cross section of the core wire is in the shape of a polygon, which improves the skin effect and helps to save space; in addition, during the pressing process, the conductive wire with a polygonal structure will not be deformed, thereby avoiding the risk of short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 is a schematic structural diagram of an inductor element in an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of a partial structure of an inductor element in an embodiment of the present invention, where the width direction of the conductive wire is perpendicular to the axial direction of the winding portion;

[0027] Figure 3 is a schematic diagram of the cross-sectional structure of the inductor element in an embodiment of the present invention, wherein the width direction of the conductive wire is perpendicular to the axial direction of the winding portion;

[0028] Figure 4 is a schematic cross-sectional view of a conductive wire in an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of a partial structure of an inductor element in an embodiment of the present invention, where the width direction of the conductive wire is parallel to the axial direction of the winding portion;

[0030] Figure 6 Schematic diagram of the cross-sectional structure of the inductor element in an embodiment of the present invention, wherein the width direction of the conductive line is parallel to the axial direction of the winding portion.

[0031] In the figure:

[0032] 100, magnetic core; 110, winding portion; 120, bearing portion;

[0033] 200, conductive wire; 210, core wire; 220, first insulating layer; 230, electrode;

[0034] 300. Magnetic plastic sealing layer. DETAILED DESCRIPTION

[0035] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0036] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0037] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0038] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediary, and indirect connection refers to two parts or components being connected to at least one intermediary respectively, and the two parts or components being connected via the intermediary. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0039] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0040] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0041] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0042] With the development of Internet technology, the requirements for the integration and miniaturization of electronic products are getting higher and higher. At the same time, the overall requirements for power inductors include miniaturization, high frequency and low cost. In order to improve the skin effect, existing power inductors will use multiple strands of round copper wires to increase the surface area. However, round copper wires take up a lot of space and are not conducive to application in small-sized products or scenarios with insufficient design space. In addition, during the pressing process, the round copper wires will deform, which may lead to the risk of short circuit.

[0043] To solve the above problems. Figures 1 to 6 As shown, this embodiment provides an inductor element, which includes a magnetic core 100, a conductive wire 200 and a magnetic plastic layer 300. The magnetic core 100 includes a winding portion 110 in a columnar structure; the conductive wire 200 includes at least two core wires 210 arranged in parallel and a first insulating layer 220 wrapped around the periphery of all the core wires 210, and the conductive wire 200 is wound around the winding portion 110; the cross-section of the conductive wire 200 is in the shape of a polygon, and the cross-section of the core wire 210 is in the shape of a polygon; the magnetic plastic layer 300 is wrapped around the periphery of the conductive wire 200 and the winding portion 110, and the two lead ends of the conductive wire 200 are each connected to an electrode 230, and the two electrodes 230 are both located outside the magnetic plastic layer 300.

[0044] The cross-section of the conductive wire 200 composed of the above-mentioned multiple core wires 210 is a polygon, and the shape of the cross-section of the core wire 210 is a polygon, which not only improves the skin effect, but also helps to save space; in addition, during the pressing process, the conductive wire 200 with a polygonal structure will not be deformed, avoiding the risk of short circuit.

[0045] In some embodiments, the cross section of the conductive wire 200 is rectangular. The conductive wire 200 with a rectangular cross section is easy to stack during the winding process, is not easy to fall off, and is easy to form a coil with a regular appearance. At the same time, it is also conducive to the stability of the performance of the inductor element. In other implementations, the cross section of the conductive wire 200 can also be a triangle, a pentagon, or a hexagon.

[0046] To improve the convenience of winding, in some embodiments, as Figure 2 and Figure 3 As shown, the width direction of the conductive wire 200 is perpendicular to the axial direction of the winding portion 110. This arrangement helps to reduce the deformation of the outer core wire 210, and is easy to bend the conductive wire 200, reducing the force required to bend the conductive wire 200 during the winding process, and reducing production costs.

[0047] like Figure 5 and Figure 6As shown, in other embodiments, the width direction of the conductive wire 200 is parallel to the axial direction of the winding portion 110 to reduce the height dimension of the inductor element, which is suitable for scenarios where space is limited in the axial direction of the winding portion 110 .

[0048] In some embodiments, the ratio of the length to the width of the cross section of the conductive wire 200 is between 1.6:1 and 8:1. That is, the ratio of the length to the width of the cross section of the conductive wire 200 is between 1.6-8.

[0049] To prevent the first insulating layer 220 from being scratched due to friction between the conductive wires 200 during the winding process, in some embodiments, the corners of the cross section of the conductive wire 200 are rounded.

[0050] In some embodiments, the cross section of the core wire 210 is rectangular. The core wire 210 with a rectangular cross section is easy to arrange to form a conductive wire 200 with a rectangular cross section, which is also conducive to the stability of the performance of the inductor element. Of course, in other embodiments, the cross section of the core wire 210 can also be a triangle, wherein the cross section of the core wire 210 is a right triangle, the inclined surfaces of the two core wires 210 are opposite to form a rectangular middle line, the two middle lines are arranged as the conductive wire 200, or the four middle lines are arranged in two rows and two columns as the conductive wire 200.

[0051] To avoid scratching the first insulating layer 220 on the inside, in some embodiments, the corners of the cross section of the core wire 210 have rounded corners. The radius of the rounded corner is half of the width of the cross section to form a racetrack shape. The core wire 210 includes a copper wire and a second insulating layer wrapped around the outer periphery of the copper wire.

[0052] The ratio of the length to the width of the cross section of the core wire 210 is between 1.6:1 and 8:1. That is, the ratio of the length to the width of the cross section of the core wire 210 is between 1.6 and 8.

[0053] In some embodiments, the conductive wire 200 includes four core wires 210, which are arranged in two rows and two columns, and the width direction of each core wire 210 is the same as the width direction of the conductive wire 200. Of course, in other embodiments, the conductive wire 200 can be composed of six, eight, or even ten core wires 210 arranged in parallel, and the specific number of core wires 210 can be arbitrarily selected as long as they can be arranged into a conductive wire 200 with a substantially rectangular cross section.

[0054] In order to improve the winding accuracy and prevent the conductive wire 200 from falling off during winding, in some embodiments, the magnetic core 100 includes a bearing portion 120, which is located at the lower end of the winding portion 110, and the outer diameter of the bearing portion 120 is greater than the outer diameter of the winding portion 110. With the above-mentioned structure, the winding process can be based on the bearing portion 120, and the first turn of the winding process abuts against the bearing portion 120, and then gradually moves away from the bearing portion 120.

[0055] In some embodiments, the magnetic plastic layer 300 is molded or prepared by coating. Regarding molding, for example, the magnetic core 100 wound with the conductive wire 200 is placed in a mold, and then a certain amount of magnetic powder is added to the mold for compression molding. The compression molding process may be heated or not.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An inductor element, characterized in that include: A magnetic core (100); the magnetic core (100) comprises a winding portion (110) in a columnar structure; A conductive wire (200), the conductive wire (200) comprising at least two core wires (210) arranged in parallel and a first insulating layer (220) wrapped around the periphery of all the core wires (210), the conductive wire (200) being wound around the winding portion (110); the cross-section of the conductive wire (200) being in the shape of a polygon, and the cross-section of the core wire (210) being in the shape of a polygon; The magnetic plastic packaging layer (300) is wrapped around the outer periphery of the conductive wire (200) and the winding portion (110), and the two lead-out ends of the conductive wire (200) are each connected to an electrode (230), and the two electrodes (230) are both located outside the magnetic plastic packaging layer (300).

2. The inductor element according to claim 1, characterized in that: The cross section of the conductive wire (200) is rectangular.

3. The inductor element according to claim 2, characterized in that: The width direction of the conductive wire (200) is perpendicular or parallel to the axial direction of the winding portion (110).

4. The inductor element according to claim 2, characterized in that: The ratio of the length to the width of the cross section of the conductive wire (200) is between 1.6:1 and 8:

1.

5. The inductor element according to claim 2, characterized in that: The corners of the cross section of the conductive wire (200) are rounded.

6. The inductor element according to claim 1, characterized in that: The cross section of the core wire (210) is rectangular; And / or, the core wire (210) comprises a copper wire and a second insulating layer wrapped around the outer circumference of the copper wire.

7. The inductor element according to claim 6, characterized in that: The cross-section of the core wire (210) has rounded corners.

8. The inductor element according to claim 6, characterized in that: The ratio of the length to the width of the cross section of the core wire (210) is between 1.6:1 and 8:1; And / or, the conductive wire (200) comprises four core wires (210), the four core wires (210) are arranged in two rows and two columns, and the width direction of each core wire (210) is the same as the width direction of the conductive wire (200).

9. The inductor element according to any one of claims 1 to 8, characterized in that: The magnetic core (100) comprises a bearing portion (120), wherein the bearing portion (120) is located at the lower end of the winding portion (110), and an outer diameter of the bearing portion (120) is greater than an outer diameter of the winding portion (110).

10. The inductor element according to any one of claims 1 to 8, characterized in that: The magnetic plastic sealing layer (300) is prepared by molding or by gluing.

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