Differential and common mode magnetic ring filter

Abstract

A differential and common mode magnetic ring filter comprises a base, a magnetic core, a soft magnetic insulation partition plate, a coil and PINs. The soft magnetic insulation partition plate is arranged in the center of the base, meanwhile, the magnetic core is located in the center of the soft magnetic insulation partition plate, and the coil is wound around the magnetic core. A magnetic partition plate is arranged in the center of the soft magnetic insulation partition plate and is used for insulation; pINs are arranged at the four corners of the bottom of the soft magnetic insulation partition plate. According to the differential-mode and common-mode magnetic ring filter, the electromagnetic partition plate is designed in the magnetic core, the insulation performance of the partition plate is ensured, and the filter can pass a high-voltage test, so that the differential-mode inductance value is improved, and the effect is better when an EMI (Electro-Magnetic Interference) test is carried out.

Description

Technical Field

[0001] This utility model relates to the technical field of filters, and in particular to a common-mode magnetic ring filter. Background Technology

[0002] Currently, all electronic and electrical products must be equipped with EMI (Electromagnetic Interference) filters at their power input / output terminals or signal ports to suppress conducted electromagnetic interference, prevent the electromagnetic interference they generate from polluting the environment, and prevent electromagnetic interference from the electromagnetic environment from affecting their normal operation. However, the design of differential and common-mode magnetic ring filters results in low differential-mode inductance values, which affects their test performance. Therefore, a differential and common-mode magnetic ring filter is designed to have a high differential-mode inductance value, enabling it to perform well in EMI testing. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a differential common-mode magnetic ring filter.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A differential and common-mode magnetic ring filter includes: a base, a magnetic core, a soft magnetic insulating partition, a coil, and pins; the soft magnetic insulating partition is disposed in the center of the base, and the magnetic core is also located in the center of the soft magnetic insulating partition, and the coil is wound on the magnetic core; a magnetic partition is disposed in the center of the soft magnetic insulating partition, and the magnetic partition is disposed in the center of the soft magnetic insulating partition and the magnetic core by injection molding for insulation; pins are disposed at the four corners of the bottom of the base.

[0006] In one embodiment, the magnetic core is located at the center of the top of the soft magnetic insulating partition, and the size of the magnetic core is adapted to the size of the base. The magnetic core is a ferrite core or a nanocrystalline core.

[0007] In one embodiment, the magnetic core is arranged in a left-right mirror image with the soft magnetic insulating partition as the center, and the coil is wound around both ends of the magnetic core body with the soft magnetic insulating partition as the center.

[0008] In one embodiment, one end of the coil lead is connected to the PIN pin.

[0009] In one embodiment, the shape and size of the front side of the magnetic separator are adapted to the shape and size of the front side of the soft magnetic insulating separator, and the height of the side of the magnetic separator is the same as the height of the side of the magnetic core.

[0010] In one embodiment, the height of the side of the soft magnetic insulating partition is greater than the height of the side of the magnetic core, and the width of the front of the soft magnetic insulating partition is greater than the width of the front of the magnetic core.

[0011] In one embodiment, the magnetic partition is coated with insulating paint for insulation.

[0012] In one embodiment, the magnetic separator is made of a magnetic material.

[0013] In one embodiment, a socket is provided at the center of the bottom of the base, the shape and size of the front of the socket being adapted to the shape and size of the front of the magnetic partition.

[0014] Compared with the prior art, the present invention has at least the following advantages:

[0015] This utility model discloses a differential and common-mode magnetic ring filter. By replacing a portion of the central part of the soft magnetic insulating partition of the original differential and common-mode magnetic ring filter with a magnetic partition, and by using plastic to completely encapsulate the magnetic partition through injection molding, the insulation performance of the partition is ensured, enabling it to pass high-voltage testing. At the same time, a layer of paint is sprayed on the surface of the magnetic plate for insulation. When the insulation requirements are high, a layer of adhesive can be applied to its surface for insulation, thereby increasing its differential-mode inductance value and improving its performance in EMI testing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the differential common-mode magnetic ring filter of this utility model;

[0018] Figure 2 This is a top view of the overall structure of the differential common-mode magnetic ring filter of this utility model;

[0019] Figure 3 This is a side view of the differential common-mode magnetic ring filter of this utility model.

[0020] In the diagram: 1. Base; 2. Magnetic core; 3. Soft magnetic insulating partition; 4. Magnetic partition; 5. Coil; 6. Pin. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Unless otherwise explicitly specified and limited, the terms “installation,” “connection,” “linking,” “fixing,” etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figure 1-3 As shown, a differential and common-mode magnetic ring filter includes: a base 1, a magnetic core 2, a soft magnetic insulating partition 3, a coil 5, and PIN pins 6. The soft magnetic insulating partition 3 is located in the center of the base 1, and the magnetic core 2 is also located in the center of the soft magnetic insulating partition 3. The coil 5 is wound around the magnetic core 2. A magnetic partition 4 is located in the center of the soft magnetic insulating partition 3. The magnetic partition 4 is installed in the center between the soft magnetic insulating partition 3 and the magnetic core 2 by injection molding (or coating, painting, or plug-in method) for insulation. PIN pins 6 are provided at the four corners of the bottom of the base 1. It should be noted that the shape of the base 1 in top view is square, and its four corners are rounded. The shape of the base 1 can be square, circular, or any other shape. The one shown in this technical solution is only one of them.

[0026] like Figure 1-3As shown in one embodiment, the magnetic core 2 is located at the center of the top of the soft magnetic insulating partition 3, and the size of the magnetic core 2 is adapted to the size of the base 1. The magnetic core 2 is a ferrite core or a nanocrystalline core. It should be noted that the shape of the magnetic core 2 can be square, circular, or any shape; the one shown in this technical solution is only one of them.

[0027] like Figure 1-3 As shown in one embodiment, the magnetic core 2 is arranged in a mirror image with the soft magnetic insulating partition 3 as the center, and the coil 5 is wound around both ends of the core body of the magnetic core 2 with the soft magnetic insulating partition 3 as the center. It should be noted that the magnetic core 2 can also be made of magnetic materials such as nanocrystals.

[0028] like Figure 1-3 As shown, in one embodiment, one end of the lead wire of coil 5 is connected to the PIN pin 6. It should be noted that coil 5 has two leads, and the two leads on the side away from magnetic core 2 are individually connected to four PIN pins 6.

[0029] like Figure 1-3 As shown in one embodiment, the shape and size of the front side of the magnetic separator 4 are adapted to the shape and size of the front side of the soft magnetic insulating separator 3, and the height of the side of the magnetic separator 4 is the same as the height of the side of the magnetic core 2. It should be noted that the shape of the magnetic separator 4 can be square, circular, or any shape; the one shown in this technical solution is only one example.

[0030] like Figure 1-3 As shown, in one embodiment, the height of the side of the soft magnetic insulating partition 3 is greater than the height of the side of the magnetic core 2, and the width of the front of the soft magnetic insulating partition 3 is greater than the width of the front of the magnetic core 2. It should be noted that the shape of the soft magnetic insulating partition 3 can be square, circular, or any other shape; the shape shown in this technical solution is merely one example.

[0031] like Figure 1-3 As shown in one embodiment, the magnetic separator 4 is coated with insulating paint for insulation. It should be noted that when the differential / common mode magnetic ring filter requires stronger insulation, an additional layer of adhesive can be sprayed onto the surface of the magnetic separator 4 to enhance its insulation effect.

[0032] like Figure 1-3 As shown in one embodiment, the magnetic separator 4 is made of a magnetic material. It should be noted that the magnetic separator 4 is made of a magnetic material such as nanocrystals or ferrite.

[0033] like Figure 1-3 As shown, in one embodiment, a socket is provided at the center of the bottom of the base 1, and the shape and size of the front of the socket are adapted to the shape and size of the front of the magnetic partition 4. It should be noted that this design allows the magnetic partition 4 to be inserted into the magnetic core 2 from the socket.

[0034] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A differential common-mode magnetic ring filter, characterized in that, include: Base (1), magnetic core (2), soft magnetic insulating partition (3), coil (5) and PIN pin (6); The soft magnetic insulating partition (3) is disposed in the center of the base (1), and at the same time the magnetic core (2) is located in the center of the soft magnetic insulating partition (3), and the coil (5) is wound on the magnetic core (2); A magnetic partition (4) is provided in the center of the soft magnetic insulating partition (3). The magnetic partition (4) is located in the center between the soft magnetic insulating partition (3) and the magnetic core (2) for insulation. The base (1) has four PIN pins (6) at the bottom corners.

2. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The magnetic core (2) is located at the center of the top of the soft magnetic insulating partition (3), and the size of the magnetic core (2) is adapted to the size of the base (1). The magnetic core (2) is a ferrite core or a nanocrystalline core.

3. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The magnetic core (2) is arranged in a left-right mirror image with the soft magnetic insulating partition (3) as the center, and the coil (5) is wound around the two ends of the core body of the magnetic core (2) with the soft magnetic insulating partition (3) as the center.

4. A differential common-mode magnetic ring filter according to claim 1, characterized in that, One end of the lead wire of the coil (5) is connected to the PIN pin (6).

5. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The shape and size of the front of the magnetic separator (4) are adapted to the shape and size of the front of the soft magnetic insulating separator (3), and the height of the side of the magnetic separator (4) is the same as the height of the side of the magnetic core (2).

6. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The height of the side of the soft magnetic insulating partition (3) is greater than the height of the side of the magnetic core (2), and the width of the front of the soft magnetic insulating partition (3) is greater than the width of the front of the magnetic core (2).

7. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The magnetic partition (4) is coated with insulating paint for insulation.

8. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The magnetic separator (4) is made of magnetic material.

9. A differential common-mode magnetic ring filter according to claim 1, characterized in that, The base (1) has a socket in the center of its bottom, and the shape and size of the front of the socket are adapted to the shape and size of the front of the magnetic partition (4).

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