Integrated inductor

Abstract

An integrated inductor comprises a magnetic core structure, a first inductance coil and a second inductance coil, and the magnetic core structure comprises a first side column, a second side column and a middle column. The first inductance coil is wound on the first side column and the middle column, the second inductance coil is wound on the second side column and the middle column, the two coils are mutually coupled through a magnetic circuit of the middle column, and respective inductance values are adjusted to work cooperatively at the same time. By means of the design, the magnetic core utilization rate is improved, the size is obviously reduced compared with a traditional inductor, and material cost is greatly saved. The integrated inductor has a high mutual inductance coefficient, and functions of energy transmission, signal coupling, impedance matching and the like are realized. The assembling structure optimizes the space utilization rate and the magnetic core efficiency, the adjacent inductance coils share a center pillar magnetic circuit, and the magnetic flux path and the inductance performance are further optimized. The invention provides an integrated inductor solution which is compact in structure, excellent in performance and high in cost effectiveness, and strict requirements of modern electronic equipment on the inductor are met.

Description

Technical Field

[0001] The invention relates to electronic components, and in particular to an integrated inductor. Background Art

[0002] In modern electronic products, inductors are important basic components and are widely used in filtering, energy storage, impedance matching and other functions. Traditional inductors are usually placed independently on PCBs (including but not limited to power inductors, PFC inductors, etc.), and when multiple inductors are required on the PCB, the inductor components are often arranged separately on the PCB. This design causes multiple inductor components to occupy too much space on the PCB, resulting in high costs, low core utilization and waste of PCB space.

[0003] It should be noted that the information disclosed in the above background technology section is only used for understanding the background of the present application, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0004] The main purpose of the present invention is to overcome the defects existing in the above-mentioned background technology and provide an integrated inductor.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An integrated inductor, comprising:

[0007] A magnetic core structure, including a first side column, a second side column and a middle column, for constructing a magnetic circuit of an inductor;

[0008] A first inductor coil is wound around the first side column and the middle column, wherein the side column part and the middle column part of the first inductor coil realize inductance adjustment through magnetic flux interaction;

[0009] A second inductor coil is wound around the second side column and the middle column, wherein the side column part and the middle column part of the second inductor coil realize inductance adjustment through magnetic flux interaction;

[0010] The first inductor coil and the second inductor coil are coupled to each other through the middle column magnetic circuit to adjust their respective inductances and achieve coordinated work.

[0011] Furthermore, the first inductor coil is wound on the first side column and the middle column in a clockwise direction, that is, the winding directions are consistent, and the second inductor coil is wound on the second side column and the middle column in a clockwise direction, that is, the winding directions are consistent.

[0012] Further, the first inductance coil is wound reversely on the first side post and the middle post, that is, the winding directions are opposite, and the second inductance coil is wound reversely on the second side post and the middle post, that is, the winding directions are opposite.

[0013] Further, the number of turns of the winding on the middle post is at least one turn less than the number of turns of the winding on the first side post and the second side post.

[0014] Further, the reverse winding forms an 8-shaped structure.

[0015] Further, the magnetic core structure is a "day"-shaped magnetic core structure.

[0016] Further, the "day"-shaped magnetic core structure includes structural forms such as EE type, EI type, and runway type with magnetic posts.

[0017] Further, a base is further included, which is used to fix the magnetic core structure and the coil to ensure the structural stability.

[0018] Further, the base is fixed to the magnetic core structure and the coil together by fixing glue.

[0019] Further, the coil includes, but is not limited to, wire materials such as flat wire and enameled wire, and the magnetic core material includes, but is not limited to, magnetic materials such as ferrite and alloy.

[0020] The present invention has the following beneficial effects:

[0021] Through innovative design, the integrated inductor of the present invention can not only flexibly adjust the coupled inductance, but also improve the utilization rate of the magnetic core, significantly reduce the volume, and effectively solve the problems of large space occupation, high cost, and low magnetic core utilization rate of traditional inductors on the PCB board. The integrated inductor of the present invention adopts a magnetic core structure with three magnetic core posts and integrates multiple inductors on one magnetic core. The integrated inductor of the present invention has a unique multi-inductor winding coupling design, in which the first inductance coil and the second inductance coil are mutually coupled through the middle post magnetic circuit, and the two coils interact through the magnetic fluxes of their respective side post parts and middle post parts to adjust their respective inductances, and at the same time achieve cooperative work. By controlling the number of winding turns, the coupled inductance can be flexibly adjusted. This innovative winding method not only improves the utilization rate of the magnetic core, but also reduces the volume of the inductor, and solves the problems of large space occupation, high cost, and low magnetic core utilization rate of traditional inductors on the PCB board.

[0022] The present invention can flexibly adjust the coupling inductance by adjusting the number of winding turns of the shared magnetic circuit. This design improves the utilization rate of the magnetic core, significantly reduces the product volume (proven to be 30.77% smaller than the volume of traditional inductors), and greatly saves material costs. The two coils of the inductor are coupled to each other through the center column magnetic circuit, and have a high mutual inductance coefficient, which can achieve multiple functions such as energy transmission, signal coupling and impedance matching while reducing the volume. In addition, the assembly structure of the inductor allows multiple inductor coils to be assembled up and down on both sides of the magnetic core, optimizing space utilization and magnetic core efficiency. Adjacent inductor coils share a magnetic core center column magnetic circuit, further optimizing the magnetic flux path and inductance performance. In general, the present invention provides an integrated inductor solution with a compact structure, superior performance and high cost-effectiveness.

[0023] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a diagram of an integrated inductor according to an embodiment of the present invention.

[0025] Figure 2 Schematic diagram of a magnetic core according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of a coil according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of multiple coils alternately assembled above and below a magnetic core cylinder according to an embodiment of the present invention.

[0028] Figure 5 Schematic diagram of a base according to an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of the assembly of the base, magnetic core and coil according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for fixing as well as for coupling or communication.

[0032] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] See also Figures 1 to 6 , an embodiment of the present invention provides an integrated inductor, comprising a magnetic core structure 1, a first inductor 2 and a second inductor 3. The magnetic core structure 1 comprises a first side column 11, a second side column 12 and a middle column 13, which are used to construct a magnetic circuit of the inductor. The first inductor 2 is wound on the first side column 11 and the middle column 13, wherein the side column part and the middle column 13 part of the first inductor 2 realize inductance adjustment through magnetic flux interaction. The second inductor 3 is wound on the second side column 12 and the middle column 13, wherein the side column part and the middle column 13 part of the second inductor 3 realize inductance adjustment through magnetic flux interaction. The first inductor 2 and the second inductor 3 are coupled to each other through the magnetic circuit of the middle column 13 to adjust their respective inductances and realize collaborative work. The embodiment of the present invention takes the magnetic core structure having three magnetic core columns as an example, but is not limited to three magnetic core columns, and the number thereof can be greater than 3.

[0035] The integrated inductor of the present invention integrates multiple inductors on three magnetic core columns of a pair of magnetic cores. Through the innovative multi-inductor winding coupling design, it can not only realize the flexible adjustment of inductance, but also improve the utilization rate of the magnetic core and significantly reduce the volume, greatly reducing the material cost. The two inductor coils are coupled through the middle column magnetic circuit, with a high mutual inductance coefficient, and realize functions such as energy transmission, signal coupling and impedance matching while reducing the volume. The optimized coupling structure improves the space utilization and magnetic core efficiency, and the shared middle column magnetic circuit further optimizes the magnetic flux path and inductance performance, thereby providing an integrated inductor solution with compact structure, superior performance and particularly high cost-effectiveness.

[0036] See also Figures 1 to 4, in some embodiments, the first inductor coil 2 is wound in the same direction around the first side post 11 and the middle post 13, that is, the winding directions are the same, and the second inductor coil 3 is wound in the same direction around the second side post 12 and the middle post 13, that is, the winding directions are the same, which can increase the inductance of the first inductor coil 2 and the second inductor coil 3.

[0037] In other embodiments, the first inductor coil 2 is wound in the opposite direction around the first side post 11 and the middle post 13, that is, the winding directions are opposite, and the second inductor coil 3 is wound in the opposite direction around the second side post 12 and the middle post 13, that is, the winding directions are opposite, which can reduce the inductance of the first inductor coil 2 and the second inductor coil 3. Further, the number of turns of the winding around the middle post 13 is at least one turn less than the number of turns of the winding around the first side post 11 and the second side post 12. Further, the reverse winding can form an 8-shaped structure.

[0038] Refer to Figures 1 to 4 , in some embodiments, the magnetic core structure 1 can be a "day"-shaped magnetic core structure 1. Specifically, the "day"-shaped magnetic core structure 1 can include various structural forms such as EE type, EI type, runway type plus magnetic posts, etc. It is sufficient that the magnetic core structure 1 provides the first side post 11, the second side post 12 and the middle post 13.

[0039] Such as Figure 5 and Figure 6 As shown, in some embodiments, the integrated inductor further includes a base 4 for fixing the magnetic core structure 1 and the coil to ensure structural stability. The base 4, the magnetic core structure 1 and the coil can be fixed together by fixing glue.

[0040] The coils in the embodiments of the present invention include, but are not limited to, wire materials such as flat wires and enameled wires, and the magnetic core materials include, but are not limited to, magnetic materials such as ferrites and alloys. The present invention does not limit this.

[0041] The specific embodiments of the present invention are further described below.

[0042] A novel integrated inductor overcomes problems such as high cost, low magnetic core utilization rate, and waste of PCB space utilization caused by the assembly of multiple inductor components in the prior art through innovative design. In particular, it can flexibly adjust the coupled inductance, improve the magnetic core utilization rate while reducing the volume. The integrated inductor mainly includes two or more coils (such as enameled wires and flat wires), a set of magnetic cores (including more than three magnetic core posts), a base, and fixing glue.

[0043] As a novel coupled inductor, a remarkable feature of this integrated inductor is that the coupled inductance can be adjusted by regulating the number of turns of the windings in the common magnetic path, thereby achieving flexible adjustment of the inductance. At the same time, this inductor adopts a design in which a set of magnetic cores are integrated with multiple inductors of the same or different types (such as power inductors, PFC inductors, etc.), improving the utilization rate of the magnetic cores and reducing the overall volume of the product. In some embodiments, a "day" - shaped magnetic core structure is adopted, which includes but is not limited to three cylindrical magnetic cores, and can be in structural forms such as EE - type, EI - type, or a runway - type plus magnetic post, etc.

[0044] On the magnetic core of the "day - shaped" structure, first wind the wire around the left - hand side post completely (the winding on the side post > 1Ts), and then lead it to the middle post to continue winding (the winding > 1Ts). There are two ways of leading: The first is the forward winding. This winding method can increase the number of turns of the coil, increasing the inductance, and ultimately can make the inductance grow exponentially. The second is the reverse winding. For example, the 8 - shaped reverse winding, the number of turns of the coil wound on the middle post is at least 1 turn less than the number of turns of the coil wound on the left - hand side post, and the number of turns of the coil wound on the middle post is greater than 1. This winding method can reduce the inductance according to the increase in the number of turns. By generating opposite magnetic - force line directions through the opposite winding directions, part of the inductance is offset. The winding method of the right - hand coil is the same as that of the left - hand coil, and the coils are wound on both sides of the middle post respectively to form a coupled inductor. This design has a very high mutual - inductance coefficient and can achieve various advantages such as energy transfer, signal coupling, and impedance matching while reducing the volume. Since the middle post is used for winding two different inductors respectively, it has very high flexibility and can adjust two different inductance values for one or more inductors. Compared with traditional inductors, the volume of the product is significantly reduced.

[0045] In the assembly structure, multiple inductance coils of the embodiments of the present invention are located on both sides of the day - shaped magnetic core, and inductance regulation is achieved through an up - and - down staggered assembly method, improving the space utilization rate and the magnetic - core efficiency. Two adjacent inductance coils share a magnetic - core middle - post magnetic path, further optimizing the magnetic - flux path and the inductance performance. The coil materials used include but are not limited to flat wires and enameled wires, etc., while the magnetic - core materials include magnetic materials such as ferrites and alloys.

[0046] In the manufacturing process, first, the dimensions, appearance, and electrical properties of the incoming magnetic cores and other materials are inspected to ensure that they meet the design requirements. Subsequently, multiple coils are assembled alternately up and down on the cylindrical part of the magnetic core to form a preliminary structure of the inductor. Then, the base is assembled with the magnetic core and the coils and fixed with fixing glue to ensure the stability of the entire structure. After assembly, electrical - property and dimension - appearance tests are carried out to verify whether the performance and appearance of the product meet the standards.

[0047] Table 1 Comparison data between the present invention and existing PFC inductors:

[0048] Maximum size inductance DCR Pressure resistance PFC Inductor 50*65*52Max 160uH100kHz1V 5mΩ 500Vdc PFC inductor of the present invention 75*30*52Max 160uH100kHz1V 5mΩ 500Vdc

[0049] Table 1 shows the size and performance comparison data of the present invention and the existing PFC inductor. While ensuring product performance, the present invention reduces the volume by 30.77%, saves the cost of one pair of magnetic cores and one base, and has significant advantages over traditional inductors. The above comparison data is for the case of the same inductance. If the inductance needs to be adjusted, the integrated inductor of the present invention can also be adjusted through the coupling effect of the middle column coil.

[0050] In summary, the integrated inductor of the present invention achieves miniaturization, high performance and low cost of the inductor with its unique design, and meets the strict requirements of modern electronic devices on inductors.

[0051] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. An integrated inductor, characterized in that: Comprising: A magnetic core structure including a first side leg, a second side leg and a middle leg, for constructing the magnetic circuit of an inductor; A first inductor coil wound around the first side leg and the middle leg, wherein the side leg part and the middle leg part of the first inductor coil interact through magnetic flux to achieve inductance adjustment; A second inductor coil wound around the second side leg and the middle leg, wherein the side leg part and the middle leg part of the second inductor coil interact through magnetic flux to achieve inductance adjustment; Wherein, the first inductor coil and the second inductor coil are magnetically coupled through the middle leg magnetic circuit to adjust their respective inductances and achieve cooperative operation.

2. The integrated inductor according to claim 1, wherein: The first inductor coil is wound clockwise on the first side leg and the middle leg, that is, the winding directions are the same, and the second inductor coil is wound clockwise on the second side leg and the middle leg, that is, the winding directions are the same.

3. The integrated inductor according to claim 1, wherein: The first inductor coil is wound counterclockwise on the first side leg and the middle leg, that is, the winding directions are opposite, and the second inductor coil is wound counterclockwise on the second side leg and the middle leg, that is, the winding directions are opposite.

4. The integrated inductor according to claim 3, characterized in that The number of turns of the middle leg is at least one turn less than the number of turns of the first side leg and the second side leg.

5. The integrated inductor according to claim 3 or 4, characterized in that: The counterclockwise winding forms an 8-shaped structure.

6. The integrated inductor according to any one of claims 1 to 5, characterized in that: The magnetic core structure is a "day"-shaped magnetic core structure.

7. The integrated inductor according to claim 6, characterized in that The "day"-shaped magnetic core structure includes structural forms such as EE type, EI type, and runway type with magnetic posts.

8. The integrated inductor according to any one of claims 1 to 7, characterized in that: It further includes a base for fixing the magnetic core structure and the coil to ensure structural stability.

9. The integrated inductor according to claim 8, characterized in that The base is fixed to the magnetic core structure and the coil with fixing glue.

10. The integrated inductor according to any one of claims 1 to 9, characterized in that: The coil includes but is not limited to wire materials such as flat wire and enameled wire, and the magnetic core material includes but is not limited to magnetic materials such as ferrite and alloy.

Images