A filter integrating a differential mode inductance and a common mode inductance

Abstract

This utility model discloses a filter integrating differential-mode and common-mode inductors, comprising a housing, an inductor assembly, and a tap assembly. A shielding plate is disposed within the housing. The inductor assembly includes a differential-mode inductor and a common-mode inductor, respectively disposed in the left and right cavities. The tap assembly includes two taps, each consisting of a main portion and two branches. The two branches pass through the top wall of the housing and enter the left and right cavities, respectively. Two independent coils are mounted on the core of the common-mode inductor. A bi-wire wound coil is mounted on the core of the differential-mode inductor. One end of each independent coil is connected to one branch of a tap, and the other end passes through the housing. Each independent coil corresponds to one tap. One end of a wire in the bi-wire wound coil is connected to the other branch of a tap, and the other end passes through the housing. Each wire in the bi-wire wound coil corresponds to one tap. This structure reduces space occupation, lowers production costs, and provides efficient energy transmission and filtering effects.

Description

Technical Field

[0001] This utility model relates to the field of electronic device technology, specifically to a filter that integrates differential-mode inductors and common-mode inductors. Background Technology

[0002] Differential-mode inductors and common-mode inductors are both core components of electromagnetic interference (EMI) filters. Differential-mode inductors primarily combat line-to-line noise, resulting in cleaner power supplies and clearer signals. Common-mode inductors primarily combat line-to-ground noise, preventing interference from entering and exiting equipment and reducing radiated and conducted emissions. In a filter, differential-mode and common-mode inductors are typically used together to handle differential-mode and common-mode noise respectively, forming a complete filter network to achieve optimal electromagnetic compatibility.

[0003] Currently, differential-mode inductors and common-mode inductors in filters are usually set separately, which takes up a lot of space, is costly, and is difficult to manufacture. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a filter that integrates differential-mode inductors and common-mode inductors. This structure can reduce space requirements, lower production costs, and provides efficient energy transfer and filtering effects.

[0005] A filter integrating differential-mode and common-mode inductors includes a housing, an inductor assembly, and a tap assembly. A shielding plate is disposed within the housing, dividing the internal cavity into a left and a right cavity. The inductor assembly includes a differential-mode inductor and a common-mode inductor, respectively disposed within the left and right cavities. The tap assembly includes two taps, each tap comprising a main portion and two branches. The bottom end of the main portion connects to the two branches, which pass through the top wall of the housing and enter the left and right cavities, respectively.

[0006] The common-mode inductor has two independent coils wound on its core, while the differential-mode inductor has a two-wire parallel-wound coil on its core.

[0007] One end of the independent coil is connected to a branch of the tap, and the other end of the independent coil passes through the housing. Each independent coil corresponds to a tap.

[0008] In the double-wire coil, one end of the conductor is connected to the other branch of the tap, and the other end of the conductor passes through the housing. The two conductors in the double-wire coil correspond one-to-one with the tap.

[0009] Preferably, the shielding plate is an aluminum plate.

[0010] Preferably, the box body is made of aluminum.

[0011] Preferably, the housing contains two inductor components and two tap components are fixed on the housing, with the two inductor components connected to the two tap components respectively.

[0012] Preferably, the filter element of the differential mode inductor is made of manganese-zinc power magnetic material.

[0013] Preferably, the core of the common-mode inductor is made of iron-based nanocrystalline magnetic material.

[0014] The beneficial effects of this utility model are as follows: In this technical solution, a shielding plate is set inside the box, and the differential-mode inductor and common-mode inductor are placed in the left cavity and the right cavity respectively. The differential-mode inductor and common-mode inductor are connected by two taps, so that the effects of differential-mode filtering and common-mode filtering can be achieved simultaneously. The shielding plate shields the interference between the differential-mode inductor and the common-mode inductor, effectively solving the electromagnetic compatibility problem and obtaining a better current curve. This structure can reduce energy loss and improve transmission efficiency. At the same time, the product is small in size, easy to install, and can achieve modular production. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure after the top plate of the box was removed in this utility model.

[0018] In the attached diagram, 1-box, 2-differential mode inductor, 3-common mode inductor, 4-shielding plate, 5-tap, 6-independent coil, 7-double-wire parallel-wound coil. Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0021] Example 1

[0022] like Figure 1 and Figure 2As shown, this embodiment provides a filter integrating differential-mode inductors and common-mode inductors, including a housing 1, an inductor assembly, and a tap assembly. A shielding plate 4 is disposed inside the housing 1, dividing the interior of the housing 1 into a left cavity and a right cavity. The inductor assembly includes a differential-mode inductor 2 and a common-mode inductor 3, which are respectively disposed in the left and right cavities. The tap assembly includes two taps 5, each tap comprising a main portion and two branches. The bottom end of the main portion connects to the two branches, and the two branches pass through the top wall of the housing 1 and enter the left and right cavities respectively.

[0023] The common-mode inductor 3 has two independent coils 6 mounted on its core, while the differential-mode inductor 2 has a two-wire parallel-wound coil 7 on its core.

[0024] One end of the independent coil 6 is connected to a branch of the tap 5, and the other end of the independent coil 6 passes through the box 1. The independent coil 6 corresponds one-to-one with the tap 5.

[0025] One end of the wire in the double-wire coil 7 is connected to the other branch of the tap 5, and the other end of the wire passes through the box 1. The two wires in the double-wire coil 7 correspond one-to-one with the tap 5.

[0026] In this embodiment, a shielding plate 4 is set inside the housing 1, and the differential-mode inductor 2 and common-mode inductor 3 are placed in the left cavity and right cavity respectively. The differential-mode inductor 2 and common-mode inductor 3 are connected by two taps 5. In this way, the effects of differential-mode filtering and common-mode filtering can be achieved simultaneously. The shielding plate 4 shields the interference between the differential-mode inductor 2 and common-mode inductor 3, effectively solving the electromagnetic compatibility problem and obtaining a better current curve. This structure can reduce energy loss and improve transmission efficiency. At the same time, the product is small in size, easy to install, and can achieve modular production.

[0027] In this embodiment, during installation, sealing rings are provided at the locations where tap 5 passes through housing 1 and where the coil wire passes through housing 1 for sealing. During use, heat is dissipated by external air or water cooling of housing 1.

[0028] In this embodiment, the shielding plate 4 is an aluminum plate. The use of aluminum plate 4 in this embodiment provides better shielding between the differential-mode inductor 2 and the common-mode inductor 3, resulting in superior shielding performance.

[0029] In this embodiment, the box body 1 is made of aluminum.

[0030] In this embodiment, two inductor components are installed inside the housing 1, and two tap components are fixed on the housing 1. The two inductor components are connected to the two tap components respectively. The use of two inductor components and two tap components in this embodiment results in better filtering performance.

[0031] In this embodiment, the filter element of the differential mode inductor 2 is made of manganese-zinc power magnetic material.

[0032] In this embodiment, the core of the common-mode inductor 3 is made of iron-based nanocrystalline magnetic material.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A filter integrating differential-mode inductor and common-mode inductor, characterized in that, The device includes a housing (1), an inductor assembly, and a tap assembly. A shielding plate (4) is installed inside the housing (1), dividing the inner cavity of the housing (1) into a left cavity and a right cavity. The inductor assembly includes a differential-mode inductor (2) and a common-mode inductor (3), which are respectively disposed in the left and right cavities. The tap assembly includes two taps (5), each tap consisting of a main part and two branches. The bottom end of the main part is connected to the two branches, which pass through the top wall of the housing (1) and enter the left and right cavities respectively. The common-mode inductor (3) has two independent coils (6) mounted on its core, and the differential-mode inductor (2) has a two-wire parallel-wound coil (7) mounted on its core. One end of the independent coil (6) is connected to one branch of the tap (5), and the other end of the independent coil (6) passes through the box (1). The independent coil (6) and the tap (5) correspond one-to-one. One end of the wire in the double-wire coil (7) is connected to the other branch of the tap (5), and the other end of the wire passes through the box (1). The two wires in the double-wire coil (7) correspond one-to-one with the tap (5).

2. The filter integrating differential-mode inductor and common-mode inductor according to claim 1, characterized in that, The shielding plate (4) is an aluminum plate.

3. The filter integrating differential-mode inductor and common-mode inductor according to claim 1, characterized in that, The box body (1) is made of aluminum.

4. A filter integrating differential-mode inductor and common-mode inductor according to claim 1, characterized in that, The box (1) is provided with two inductor components and two tap components are fixed on the box (1). The two inductor components are respectively connected to the two tap components.

5. A filter integrating differential-mode inductor and common-mode inductor according to claim 1, characterized in that, The filter element of the differential mode inductor (2) is made of manganese-zinc power magnetic material.

6. A filter integrating differential-mode inductor and common-mode inductor according to claim 1, characterized in that, The core of the common-mode inductor (3) is made of iron-based nanocrystalline magnetic material.

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