Pin header type power supply filter and manufacturing method thereof

Abstract

The invention discloses a pin header type power filter and a manufacturing method thereof, the pin header type power filter comprises a shell and a bottom plate, the shell is provided with a containing cavity with a bottom opening, a common mode inductor, a differential mode inductor, a Cx capacitor and a Cy capacitor are installed in the containing cavity and are poured by pouring sealant, and the bottom plate covers the bottom opening of the shell in a sealing mode. A first pin header and a second pin header are arranged on the left side and the right side of the shell respectively and used for being connected with a power line at the power end and a power module at the rear end respectively. According to the arrangement mode of the pin header, the length of a lead of a power filter product can be reduced, electromagnetic radiation and reception on the lead are reduced, and the anti-interference capability of the power filter is improved.

Description

Technical Field

[0001] The invention relates to a pin-row type power supply filter and a manufacturing method thereof, belonging to the technical field of power supply filters. Background Art

[0002] The power filter is an electronic device that can remove high-frequency interference on the power line. It provides common-mode suppression and differential-mode suppression interference capabilities for EMI electromagnetic interference from 150kHz to 30MHz through its internal LCR filter network circuit and its structure. Common power filters on the market are mainly divided into three types of structures: one is a surface mount structure, one is a circuit board direct plug welding structure, and the other is a metal plate mounted flying lead welding structure. In some specific installation occasions, in order to obtain good suppression capabilities for EMI interference, it is necessary to ground the power filter on the circuit board surface and connect the power line through leads parallel to the circuit board. By shortening the lead length, the electromagnetic radiation and reception of the line to space can be reduced. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pin-row power filter and a manufacturing method thereof, so as to reduce electromagnetic radiation and reception on the lead wire and improve the anti-interference ability of the power filter.

[0004] The technical solution adopted by the present invention is: a pin-row power filter, including a shell and a bottom plate, the shell has a accommodating cavity with a bottom opening, common-mode inductors, differential-mode inductors, Cx capacitors and Cy capacitors are installed in the accommodating cavity and are potted with potting glue, the bottom plate is sealed and covered at the bottom opening of the shell, and a first row of pins and a second row of pins are respectively arranged on the left and right sides of the shell, and the first row of pins and the second row of pins are respectively used to connect the power line of the power supply end and the power module at the rear end.

[0005] Furthermore, the above-mentioned first row of needles is divided into two groups, each group of three is connected in parallel, and the two groups of first row of needles are respectively connected to the positive and negative poles of the power filter input end, and the second row of needles is divided into two groups, each group of three is connected in parallel, and the two groups of second row of needles are respectively connected to the positive and negative poles of the power filter output end.

[0006] Furthermore, the first row of needles and the second row of needles are respectively fixedly connected to two end resin plates, and the two end resin plates are respectively fixedly connected to the inner sides of both ends of the shell, and six openings are provided at both ends, and insulators are installed in the six openings, and the six rows of needles on each side pass through the insulators. Furthermore, the housing is a metal housing, and mounting platforms are arranged at the left and right ends of the bottom of the housing, and mounting through holes are arranged on the mounting platforms.

[0007] Furthermore, the bottom plate is a metal bottom plate, which is flush with the bottom surface of the outer shell after being covered, and the bottom plate and the outer shell are fixed with screws, and a connecting step is arranged in the outer shell connected by the screws.

[0008] Furthermore, a grounding screw is connected inside the housing, and the grounding screw is connected to a grounding terminal of the power filter.

[0009] Furthermore, the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated from the housing by insulating materials, and two adjacent components of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated by insulating materials.

[0010] A method for manufacturing a pin-row power filter, the method comprising the following steps: S1. Install the common-mode inductor, differential-mode inductor, multiple Cx capacitors and multiple Cy capacitors required by the power filter into the housing, and connect them with cables according to the circuit diagram of the power filter, and the input end of the power filter is respectively connected to the first row of pins and the second row of pins on both sides of the housing, and the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated from the housing by insulating materials, and the adjacent two components of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated by insulating materials; S2. Adjust the positions of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor so that the performance parameters of the power filter meet the design requirements; S3. After adjusting the components of the power filter, use potting glue to pot; S4. After the potting glue is filled and the base plate is covered, it is cured at room temperature for no less than 48 hours. Beneficial effects of the present invention: Compared with the prior art, the pin arrangement of the present invention can reduce the lead length of the power filter product, reduce the electromagnetic radiation and reception on the lead, and improve the anti-interference ability of the power filter. At the same time, each line provides a group of 3 pins as the input and output ends of the connection interface, which reduces the risk that the product cannot be used normally once the lead forms an open loop due to the input and output ends being connected by only one lead, and improves the connection reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of a pin-type power filter; Figure 2 This is a schematic diagram of the pin-type power filter structure viewed from above; Figure 3 This is a schematic diagram of the top view of the pin-type power filter; Figure 4 This is a schematic diagram of the left view of the pin-type power filter; Figure 5 It is a schematic diagram of the three-dimensional structure of the shell and the installation of the pin header; Figure 6 This is a schematic diagram of the pin-type power filter structure when the bottom plate is removed and viewed from above; Figure 7 It is a schematic diagram of the cross-sectional structure of a pin-type power filter; Figure 8 It is the first schematic diagram of the pin-type power filter; Fig. 9 This is the second schematic diagram of the pin-type power filter. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] Example 1: Figure 1-9 As shown, a pin-row power filter comprises a shell 1 and a bottom plate 7. The shell 1 has a receiving cavity 2 with a bottom opening. A common-mode inductor 3, a differential-mode inductor 4, a Cx capacitor 5 and a Cy capacitor 6 are installed in the receiving cavity 2 and are potted with potting glue. The bottom plate 7 is sealed and covered at the bottom opening of the shell 1. A first row of pins 8 and a second row of pins 9 are respectively arranged on the left and right sides of the shell 1. The first row of pins 8 and the second row of pins 9 are respectively used to connect the power line of the power supply end and the power module at the rear end.

[0014] Among them, in order to improve the reliability of conductive connection, the first row of needles 8 is divided into two groups, each group of three is connected in parallel, and the two groups of first row of needles are respectively connected to the positive and negative poles of the input end of the power filter, and the second row of needles 9 is divided into two groups, each group of three is connected in parallel, and the two groups of second row of needles are respectively connected to the positive and negative poles of the output end of the power filter. Three row of needles are provided as a group on each line as the connection interface input and output, which reduces the risk of the product not being able to be used normally due to only one lead connecting the input and output ends, once the lead forms an open loop, thereby improving the connection reliability of the product.

[0015] In order to improve the reliability of the pin row after installation, the first pin row 8 and the second pin row 9 are respectively fixedly connected to two end resin plates 10, and the two end resin plates 10 are respectively fixedly connected to the inner sides of the two ends of the shell 1, and six openings are provided at both ends. Insulators 11 are installed in the six openings. The six pins on each side pass through the insulators 11. Through the resin plate, the insulators can be conveniently fixed and set, thereby improving the insulation performance and positioning reliability (the insulators are positioned in coordination with the openings), and the installation efficiency is greatly improved. In order to facilitate the installation of the product, the shell 1 is a metal shell, and a mounting platform 12 is set at the left and right ends of the bottom of the shell 1. The mounting platform 12 is provided with a mounting through hole 13. The product is installed on the corresponding circuit board using the mounting platform and screws, which can improve the speed and reliability of installation.

[0016] For the convenience of installation, the base plate 7 is made of a metal base plate. The base plate 7 is covered on the step inside the shell and is flush with the bottom surface of the shell 1 after covering. The base plate 7 is fixed to the shell 1 with screws 14. A connecting step 15 is arranged in the shell 1 connected with the screws 14. The flush structure does not affect the fit of the installation. The screws are used to fix the connecting step, and the connection reliability is better.

[0017] For the convenience of grounding, a grounding screw 16 is connected inside the housing 1. The grounding screw 16 is connected to the grounding terminal of the power filter. The grounding screw is directly connected to the metal housing, so the grounding reliability is better.

[0018] In order to avoid mutual interference between components, the common-mode inductor 3, the differential-mode inductor 4, the Cx capacitor 5 and the Cy capacitor 6 are isolated from the housing 1 by insulating materials, and two adjacent components among the common-mode inductor 3, the differential-mode inductor 4, the Cx capacitor 5 and the Cy capacitor 6 are isolated by insulating materials.

[0019] In the present invention, the two ends of the accommodating cavity are respectively loaded with a resin plate for fixing, and the resin plate has 6 through holes, which are respectively used to install the pin headers, wherein the three pin headers arranged side by side are connected together for connecting such as Figure 8 The positive end shown in the figure, the remaining 3 pins are connected together for connection such as Figure 8 The leads of the common mode inductor are connected to two groups of pins on the resin board respectively. The Cx capacitor includes capacitor C1 and capacitor C2 connected between the positive and negative electrodes. The capacitor Cy includes capacitor C3, capacitor C4, capacitor C5 and capacitor C6 between the line and the ground. At the same time, the leads at both ends of the Cx capacitor are connected to the two groups of pins on the resin board respectively. One end of the leads of the two Cy capacitors are connected to the two groups of pins on the resin board respectively. The other end of the Cy capacitor is fixed to the metal shell through the grounding screw in the accommodating cavity, forming a Figure 6 As required, another Cx ( Figure 8 In the figure, there are capacitors C1 and C2) and two Cy capacitors, and the two lead wires of the common-mode inductor are respectively connected to the differential-mode inductor at the back, and the leads of the differential-mode inductor are respectively connected to the two sets of pins on the resin board at the other end.

[0020] Embodiment 2: A method for manufacturing a pin-row power filter, the method comprising the following steps: S1. Install the common-mode inductor, differential-mode inductor, multiple Cx capacitors and multiple Cy capacitors required by the power filter into the housing, and connect them according to the circuit diagram of the power filter using cables, and the input end of the power filter is respectively connected to the first row of pins and the second row of pins on both sides of the housing, and the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated from the housing by insulating materials, that is, the bottom surface of the accommodating cavity is insulated and isolated by insulating materials (insulating paper or barley paper or resin sheet), and the adjacent two components of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated by insulating materials such as insulating paper or barley paper or resin sheet; S2. Adjust the positions of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor so that the performance parameters of the power filter meet the design requirements; S3. After adjusting the components of the power filter, potting is performed using a potting adhesive, the potting adhesive including a two-component epoxy resin, a two-component silicone rubber, or a single-component vulcanized silicone adhesive; S4. After the potting glue is potted and the base plate is covered, it is cured at room temperature for no less than 48 hours. The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A pin-row power filter, characterized in that: The invention comprises a shell (1) and a bottom plate (7), wherein the shell (1) has a receiving cavity (2) with a bottom opening, wherein a common-mode inductor (3), a differential-mode inductor (4), a Cx capacitor (5) and a Cy capacitor (6) are installed in the receiving cavity (2) and are potted with potting glue, wherein the bottom plate (7) is sealed and covered at the bottom opening of the shell (1), and a first row of needles (8) and a second row of needles (9) are respectively arranged on the left and right sides of the shell (1), wherein the first row of needles (8) and the second row of needles (9) are respectively used to connect a power line at a power supply end and a power module at a rear end.

2. The pin-row power filter according to claim 1, characterized in that: The first row of needles (8) is divided into two groups, each group of three needles is connected in parallel, and the two groups of first row needles are respectively connected to the positive pole and negative pole of the input end of the power filter, and the second row of needles (9) is divided into two groups, each group of three needles is connected in parallel, and the two groups of second row needles are respectively connected to the positive pole and negative pole of the output end of the power filter.

3. The pin-row power filter according to claim 1, characterized in that: The first row of needles (8) and the second row of needles (9) are respectively fixedly connected to two end resin plates (10), and the two end resin plates (10) are respectively fixedly connected to the inner sides of both ends of the housing (1), and both ends are provided with six openings, and the six openings are installed with insulators (11), and the six row of needles on each side pass through the insulators (11).

4. The pin-row power filter according to claim 1, characterized in that: The housing (1) is a metal housing, and mounting platforms (12) are arranged at the left and right ends of the bottom of the housing (1), and mounting through holes (13) are arranged on the mounting platforms (12).

5. The pin-row power filter according to claim 4, characterized in that: The bottom plate (7) is a metal bottom plate. After the bottom plate (7) is covered, it is flush with the bottom surface of the outer shell (1). The bottom plate (7) and the outer shell (1) are fixed by screws (14). A connecting step (15) is arranged inside the outer shell (1) connected by the screws (14).

6. The pin-row power filter according to claim 5, characterized in that: A grounding screw (16) is connected inside the housing (1), and the grounding screw (16) is connected to the grounding terminal of the power filter.

7. The pin-row power filter according to claim 5, characterized in that: The common mode inductor (3), the differential mode inductor (4), the Cx capacitor (5) and the Cy capacitor (6) are isolated from the housing (1) by insulating materials, and two adjacent components of the common mode inductor (3), the differential mode inductor (4), the Cx capacitor (5) and the Cy capacitor (6) are isolated by insulating materials.

8. The method for manufacturing a pin-row power filter according to claim 1, characterized in that: The method comprises the following steps: S1. Install the common-mode inductor, differential-mode inductor, multiple Cx capacitors and multiple Cy capacitors required by the power filter into the housing, and connect them with cables according to the circuit diagram of the power filter, and the input end of the power filter is respectively connected to the first row of pins and the second row of pins on both sides of the housing, and the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated from the housing by insulating materials, and the adjacent two components of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor are isolated by insulating materials; S2. Adjust the positions of the common-mode inductor, differential-mode inductor, Cx capacitor and Cy capacitor so that the performance parameters of the power filter meet the design requirements; S3. After adjusting the components of the power filter, use potting glue to pot; S4. After the potting glue is filled and the base plate is covered, it is cured at room temperature for no less than 48 hours.

Images