An integrated EMI filter device

Abstract

The utility model discloses an integrated EMI filter device relates to filter device technical field, the utility model discloses a panel and fixedly connected to the back of panel apron, the inside of panel is provided with the function storehouse, the insurance storehouse and the connecting storehouse of concave distribution, the inside installation of function storehouse has metal film resistance, ground plate parts, buckle type flat magnetic ring, ground column, rectangular connector and resin seal screw filter, the inside installation of insurance storehouse has the fuse box, the inside installation of connecting storehouse has circular connector. The utility model discloses through adopting multi -chamber zoning design, lets function storehouse, insurance storehouse, connecting storehouse independent layout, cooperate ground plate parts and form shielding ground structure simultaneously, can prevent the interference signal crosstalk coupling between different chambers, and simultaneously realizes high low frequency integration filtering in combination with resin seal screw filter and buckle type flat magnetic ring, and the whole integration assembly makes connector direct integration in panel, avoids the interference coupling problem caused by the input line too long.

Description

Technical Field

[0001] This utility model belongs to the field of filtering device technology, and in particular relates to an integrated EMI filtering device. Background Technology

[0002] In the fields of electronic information, industrial automation, and communication technology, electromagnetic compatibility (EMC) is a core indicator determining the stable operation of electronic equipment. Electromagnetic interference (EMI) is the main cause of EMC failure. As a key component for suppressing EMI, the core function of an EMI filter is to attenuate or absorb interference signals embedded in power lines and signal lines through a specific filter network structure composed of capacitors, inductors, and resistors. These interference signals include both interference radiated from internal circuits and interference from the external environment. This device can prevent the EMI generated by the equipment itself from radiating outwards and polluting the electromagnetic environment, and it can also block external EMI from entering the equipment. This ensures the normal operation of precision electronic equipment such as radar systems, industrial controllers, communication base stations, and medical equipment in complex electromagnetic environments, and avoids problems such as data transmission errors, equipment crashes, and functional failures caused by EMI.

[0003] Most EMI filtering devices currently on the market adopt a single-chamber or simple partitioned design, with filters, resistors, connectors and other functional components installed in the same space. This makes it easy for signals of different frequency bands to cross-couple within the chamber. In addition, high-frequency and low-frequency filtering functions often need to be implemented separately, usually requiring separate configuration of low-frequency power filters and high-frequency magnetic ring components. This design not only increases installation space and assembly complexity, but also easily creates interference suppression blind spots due to poor connection of filtering frequency bands, failing to achieve efficient filtering across the entire frequency band. At the same time, connectors and the filter device body are often installed separately, requiring additional wiring for input / output signal lines. Excessively long wires are not only prone to coupling with spatial electromagnetic interference.

[0004] To address these issues, we provide an integrated EMI filter device. Utility Model Content

[0005] The purpose of this utility model is to provide an integrated EMI filter device. By adopting a multi-chamber partition layout and forming a shielded grounding structure with the grounding plate component, it combines a resin-sealed screw-mounted filter and a snap-on flat magnetic ring to achieve integrated high and low frequency filtering. At the same time, the overall integrated assembly allows the connector to be directly integrated into the panel, and the modular design constructs an independent signal filtering module. This solves the problems of existing filter devices that are prone to signal crosstalk, poor filtering effect due to the separation of high and low frequency filtering functions, and interference coupling caused by excessively long input lines due to the separate installation of connectors and the main body.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is an integrated EMI filter device, including a panel and a cover plate fixedly connected to the back of the panel; the panel has a concave functional compartment, a fuse compartment and a connection compartment inside, the functional compartment is equipped with a metal film resistor, a grounding plate component, a snap-on flat magnetic ring, a grounding post, a rectangular connector and a resin-sealed screw-mounted filter, the fuse compartment is equipped with a fuse box, and the connection compartment is equipped with a circular connector.

[0008] The present invention is further configured such that a metal indicator light is installed on the front of the panel, and the connection end of the metal indicator light is located inside the functional compartment.

[0009] The present invention is further configured such that the rectangular connector is installed on the side wall of the functional compartment, and the rectangular connector is located between the insurance compartment and the connection compartment.

[0010] The present invention is further configured such that the socket end of the circular connector penetrates through the front of the panel, and the socket end of the circular connector is movably fitted with a socket sealing cover.

[0011] The present invention is further provided that a number of wire clips are fixedly connected inside the functional compartment.

[0012] The present invention is further provided that a handle is fixedly connected to the front side of the panel.

[0013] The present invention is further configured such that a portion of the signal lines of the rectangular connector are connected to the corresponding pins of the circular connector, a portion of the signal lines of the circular connector are connected to the corresponding solder holes on the ground plane component, and the signal lines of the metal indicator light are connected to the corresponding pins of the circular connector and then connected to the resin-sealed screw-mounted filter.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model equips the filter device chamber with a grounded outer shell with shielding function and adopts a multi-chamber internal design, which can not only prevent crosstalk coupling between interference signals, but also effectively suppress the coupling phenomenon between different signals, thereby solving the electromagnetic compatibility problem in the signal transmission process of the system.

[0016] 2. This utility model adopts high and low frequency integrated filtering technology in the filtering device to form a shielded structure with the whole machine. At the same time, combined with independent filtering methods, it can meet the customer's requirements for electromagnetic compatibility testing.

[0017] 3. This utility model adopts an integrated design for the filtering device, directly mounting the connector onto the device. This avoids the problem of interference coupling to the circuit board or internal power lines due to excessively long input lines. Furthermore, the entire filtering device is shielded, minimizing spatial radiation and coupling. This also facilitates overall product assembly, testing, and maintenance, significantly saving assembly time, reducing assembly difficulty, and improving assembly efficiency.

[0018] 4. This utility model adopts a modular design for the filtering device, with independent signal filtering modules to realize the filtering function. During assembly, prefabricated filtering modules can be directly installed. In case of failure, the fault point can be quickly detected, and the damaged module can be quickly disassembled and replaced with a new module, ensuring that the device has good assemblability, testability and maintainability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front structural diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 3 This is the circuit diagram of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 100. Panel; 101. Function compartment; 102. Fuse compartment; 103. Connection compartment; 200. Cover plate; 300. Wire clamp; 400. Metal film resistor; 500. Grounding plate component; 600. Snap-on flat magnetic ring; 700. Rectangular connector; 800. Grounding post; 900. Handle; 1000. Metal indicator light; 1100. Fuse box; 1200. Socket sealing cover; 1300. Circular connector; 1400. Resin-sealed screw-on filter. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 3 This utility model is an integrated EMI filter device, including a panel 100 and a cover plate 200 fixedly connected to the back of the panel 100; the panel 100 has a concave functional compartment 101, a fuse compartment 102 and a connection compartment 103. The functional compartment 101 is equipped with a metal film resistor 400, a grounding plate component 500, a snap-fit ​​flat magnetic ring 600, a grounding post 800, a rectangular connector 700 and a resin-sealed screw-mounted filter 1400. The fuse compartment 102 is equipped with a fuse box 110. 0. The internal structure of the connection compartment 103 is equipped with a circular connector 1300. By setting up a multi-chamber design of functional compartment 101, safety compartment 102 and connection compartment 103 in the panel 100, different functional components are installed in each compartment. With the grounding shell of the grounding plate component 500, it can play a shielding function to prevent crosstalk coupling of interference signals in different compartments. At the same time, it can suppress signal coupling between components such as metal film resistor 400 and resin sealed screw filter 1400, effectively solving the electromagnetic compatibility problem in system signal transmission.

[0028] Specifically, a metal indicator light 1000 is installed on the front of the panel 100, and the connection end of the metal indicator light 1000 is located inside the function compartment 101.

[0029] The interior of the functional compartment 101 is also fixedly connected with several wire clips 300. The wire clips 300 can organize the signal wires inside the functional compartment 101 and reduce wire clutter.

[0030] A handle 900 is fixedly connected to the front of the panel 100. The handle 900 facilitates the overall handling and assembly of the filter device. Combined with the integrated design, it improves the ease of product assembly.

[0031] Furthermore, the rectangular connector 700 is installed on the side wall of the functional compartment 101, and the rectangular connector 700 is located between the safe compartment 102 and the connection compartment 103.

[0032] The socket end of the circular connector 1300 extends through the front of the panel 100, and the socket end of the circular connector 1300 is movably fitted with a socket sealing cover 1200. The socket sealing cover 1200 can protect the socket end of the circular connector 1300 and prevent dust, moisture and other factors from affecting the stability of the interface contact.

[0033] A portion of the signal lines of the rectangular connector 700 are connected to the corresponding pins of the circular connector 1300. A portion of the signal lines of the circular connector 1300 are connected to the corresponding solder holes on the ground plane component 500. The signal lines of the metal indicator light 1000 are connected to the corresponding pins of the circular connector 1300 and then to the resin-sealed screw-mounted filter 1400. The resin-sealed screw-mounted filter 1400, as an independent filtering module, works with the ground plane component 500 to achieve integrated high and low frequency filtering technology, forming a shielded structure with the whole machine to meet the customer's electromagnetic compatibility test requirements. Moreover, the filtering module is independent of other components, and in case of subsequent failures, the fault point can be quickly located and quickly disassembled and replaced, providing good testability and maintainability.

[0034] The operation process of this embodiment is as follows: the resin-sealed screw-mounted filter 1400 in the functional compartment 101 forms a shielding structure with the ground plane component 500, which can effectively suppress signal coupling between the metal film resistor 400 and components such as the rectangular connector 700 and the circular connector 1300, realizing integrated high and low frequency filtering, thereby solving the electromagnetic compatibility problem in the system signal transmission; the illumination status of the metal indicator light 1000 after the device is powered on can intuitively indicate the normal working status of the device; the classification and clamping of the signal lines in the compartment by several wire clamps 300 in the functional compartment 101 can avoid the interference of messy lines with the stability of device operation; in addition, the resin-sealed screw-mounted filter 1400 is designed to be independent of other components, so that the fault point can be quickly located and disassembled and replaced when the device fails, ensuring that the device has good testability and maintainability.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. An integrated EMI filter device, comprising a panel (100) and a cover plate (200) fixedly connected to the back of the panel (100); characterized in that: The panel (100) has a concave functional compartment (101), a safety compartment (102), and a connection compartment (103) inside. The functional compartment (101) is equipped with a metal film resistor (400), a grounding plate component (500), a snap-fit ​​flat magnetic ring (600), a grounding post (800), a rectangular connector (700), and a resin-sealed screw-mounted filter (1400). The safety compartment (102) is equipped with a fuse box (1100). The connection compartment (103) is equipped with a circular connector (1300).

2. The integrated EMI filter device according to claim 1, characterized in that, A metal indicator light (1000) is mounted on the front of the panel (100), and the connection end of the metal indicator light (1000) is located inside the functional compartment (101).

3. The integrated EMI filter device according to claim 1, characterized in that, The rectangular connector (700) is installed on the side wall of the functional compartment (101), and the rectangular connector (700) is located between the insurance compartment (102) and the connection compartment (103).

4. The integrated EMI filter device according to claim 1, characterized in that, The socket end of the circular connector (1300) penetrates the front of the panel (100), and the socket end of the circular connector (1300) is movably fitted with a socket sealing cover (1200).

5. The integrated EMI filter device according to claim 1, characterized in that, Several wire clips (300) are also fixedly connected inside the functional compartment (101).

6. The integrated EMI filter device according to claim 1, characterized in that, A handle (900) is fixedly connected to the front of the panel (100).

7. The integrated EMI filter device according to claim 1, characterized in that, A portion of the signal lines of the rectangular connector (700) are connected to the corresponding pins of the circular connector (1300), a portion of the signal lines of the circular connector (1300) are connected to the corresponding solder holes on the ground plane component (500), and the signal lines of the metal indicator light (1000) are connected to the corresponding pins of the circular connector (1300) and then to the resin-sealed screw-mounted filter (1400).

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