EMC structure and frequency converter

Abstract

The utility model is suitable for the technical field of frequency converters, and provides an EMC structure and a frequency converter. The EMC structure comprises a terminal circuit board, an EMC circuit board and a conductive piece, and the frequency converter comprises a protective shell and further comprises any one of the EMC structures. When the conductive part is installed on the EMC circuit board, the conductive part is in contact with the first conduction area and the second conduction area, so that electrical conduction of the first conduction area and the second conduction area is achieved, and then electrical connection of the safety capacitor and the grounding structure is achieved. And after the conductive part is detached from the EMC circuit board, the safety capacitor is disconnected from the grounding structure. According to the utility model, disconnection and connection between the safety capacitor and the grounding structure can be realized through dismounting and mounting of the conductive member, so that disconnection operation of the EMC structure is more convenient, a client can freely select a mounting mode according to a field application environment, and convenience and safety of equipment mounting are improved.

Description

Technical Field

[0001] This utility model belongs to the field of frequency converter technology, and in particular relates to an EMC structure and frequency converter. Background Technology

[0002] EMC (Electromagnetic Compatibility) refers to the ability of a device or system to operate within an electromagnetic environment without affecting other equipment due to electromagnetic interference. Therefore, EMC design has become a crucial indicator in product design. While achieving interference resistance through EMC structure, products must also ensure the flexibility of disconnectable operation, allowing users to choose a design better suited to their field application environment. However, current EMC structures suffer from the inconvenience of disconnectable operation. Utility Model Content

[0003] The purpose of this utility model is to provide an EMC structure and frequency converter, which aims to solve the technical problem of inconvenient disconnection operation in the installation and use of existing EMC structures.

[0004] This utility model is implemented as follows: Firstly, it provides an EMC structure, including a terminal circuit board, an EMC circuit board, and a conductive component. The terminal circuit board has a safety capacitor and a grounding structure. The EMC circuit board has a first conductive region and a second conductive region, which are electrically disconnected from each other. The first conductive region is electrically connected to the safety capacitor through lines on the terminal circuit board and the EMC circuit board. The second conductive region is electrically connected to the grounding structure through lines on the terminal circuit board and the EMC circuit board. The conductive component is detachably mounted on the EMC circuit board. When the conductive component is mounted on the EMC circuit board, it is in contact with both the first conductive region and the second conductive region to achieve electrical conduction between them.

[0005] In one optional embodiment, the first conductive area is located on the first surface of the EMC circuit board, and the second conductive area is located on the second surface of the EMC circuit board, with the positions of the first conductive area and the second conductive area corresponding to each other.

[0006] In an optional embodiment, the conductive element includes a first abutting piece, a second abutting piece, and a connecting piece, wherein the connecting piece is connected between the first abutting piece and the second abutting piece, and the first abutting piece and the second abutting piece are respectively used to abut against the first conductive region and the second conductive region to achieve electrical conduction between them.

[0007] In an optional embodiment, the connecting piece is connected between the first end of the first abutting piece and the first end of the second abutting piece, and the second end of the first abutting piece is provided with an inclined guide portion that is inclined in a direction away from the second abutting piece, and the second end of the second abutting piece is provided with an inclined guide portion that is inclined in a direction away from the first abutting piece.

[0008] In one optional embodiment, the EMC circuit board has a first connection portion, and the terminal circuit board has a first insertion hole. The first connection portion and the first insertion hole are mutually inserted and engaged. A plurality of gold fingers are provided on the surface of the first connection portion. At least some of the gold fingers are electrically connected to the first conductive area, and at least another portion of the gold fingers are electrically connected to the second conductive area. When the first connection portion is inserted into the first insertion hole, the EMC circuit board is electrically connected to the terminal circuit board through the gold fingers.

[0009] In one optional embodiment, the EMC circuit board is provided with a second connection portion, the second connection portion being spaced apart from the first connection portion, the terminal circuit board is provided with a second insertion hole, and the second connection portion is inserted into the second insertion hole.

[0010] In an optional embodiment, the EMC structure further includes an insulating isolator for insulating and isolating the first conductive area and the second conductive area from the terminal circuit board. The EMC circuit board is provided with a mounting slot for mounting the insulating isolator, and the insulating isolator is inserted into the mounting slot.

[0011] In a second aspect, a frequency converter is provided, including a protective housing and an EMC structure as described in any of the above claims, wherein the EMC structure is disposed within the protective housing, and the protective housing is further provided with a clearance opening for the conductive component to be inserted into the protective housing from outside the protective housing.

[0012] In an optional embodiment, the clearance opening is further provided with a guide angle C, which is used to guide the installation and removal of the conductive component, and the conductive component is provided with a slot that matches the guide angle C.

[0013] In an optional embodiment, a limiting part is provided at the clearance opening, the limiting part being used to limit the conductive element to control the insertion depth of the conductive element.

[0014] The first aspect of the technical effect compared to the existing technology is: by adding an EMC circuit board and connecting the terminal circuit board to the EMC circuit board, the safety capacitor and grounding structure on the terminal circuit board can be guided to a safe and convenient operating position through the EMC circuit board. This can ensure that the electronic equipment on the circuit board operates normally in the electromagnetic environment, and the electromagnetic radiation generated by itself complies with the prescribed limits, so that the whole system has a certain resistance to external electromagnetic interference.

[0015] The EMC circuit board has a first conductive region and a second conductive region that are electrically disconnected from each other. After the terminal circuit board is connected to the EMC circuit board, the wiring arrangement on the terminal circuit board and the EMC circuit board enables the first conductive region to be electrically connected to the safety capacitor on the terminal circuit board, and the second conductive region to be electrically connected to the grounding structure on the terminal circuit board. Simultaneously, conductive components are also detachably installed on the EMC circuit board. When the conductive components are installed on the EMC circuit board, they are in contact with both the first and second conductive regions, achieving electrical continuity between the first and second conductive regions, thereby enabling the safety capacitor to be electrically connected to the grounding structure. After the conductive components are removed from the EMC circuit board, the safety capacitor is disconnected from the grounding structure.

[0016] Compared with the existing EMC structure, this application adds an EMC circuit board, which guides the safety capacitor and grounding structure lines on the terminal circuit board to a safe and convenient operation position. Then, the safety capacitor and grounding structure are disconnected and connected by removing and installing conductive parts, making the disconnectable operation of the EMC structure more convenient. This allows customers to freely choose the installation method according to the on-site application environment, and also improves the convenience and safety of equipment installation.

[0017] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model or the prior art 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.

[0019] Figure 1 This is a schematic diagram of the EMC structure provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the EMC structure for removing conductive components provided in this embodiment of the utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the EMC structure for removing conductive components provided in this embodiment of the utility model. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the EMC circuit board used in the embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the terminal circuit board used in the embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the conductive component used in an embodiment of this utility model;

[0025] Figure 7 This is an exploded structural diagram of the frequency converter provided in this embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the frequency converter provided in this embodiment of the utility model;

[0027] Figure 9 Figure 8 Enlarged structural diagram at point A;

[0028] Figure 10 This is a partial schematic diagram of the frequency converter provided in the embodiment of this utility model in the state of the conductive components being installed.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Terminal circuit board; 11. First insertion hole; 12. Second insertion hole; 2. EMC circuit board; 21. First conductive area; 22. Second conductive area; 23. First connecting part; 24. Second connecting part; 25. Gold finger; 26. Mounting slot; 3. Conductive component; 31. First abutment piece; 32. Second abutment piece; 33. Connecting piece; 34. Inclined guide part; 35. Slot; 4. Safety capacitor; 5. Grounding structure; 6. Insulating isolation component; 7. Housing; 71. Clearance opening; 72. Limiting part; 73. Guide clearance C-angle; 8. Heat sink; 9. Terminal block. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, 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. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] Please refer to Figures 1 to 3 As shown in the present invention, in a first aspect, an EMC structure is provided, including a terminal circuit board 1, an EMC circuit board 2, and a conductive element 3. The terminal circuit board 1 has a safety capacitor 4 and a grounding structure 5. The EMC circuit board 2 has a first conductive region 21 and a second conductive region 22. The first conductive region 21 and the second conductive region 22 are electrically disconnected from each other. The first conductive region 21 is electrically connected to the safety capacitor 4 through lines on the terminal circuit board 1 and the EMC circuit board 2. The second conductive region 22 is electrically connected to the grounding structure 5 through lines on the terminal circuit board 1 and the EMC circuit board 2. The conductive element 3 is detached and installed on the EMC circuit board 2. When the conductive element 3 is installed on the EMC circuit board 2, the conductive element 3 abuts against both the first conductive region 21 and the second conductive region 22 to achieve electrical conduction between the first conductive region 21 and the second conductive region 22.

[0037] Specifically, terminal circuit board 1 refers to a circuit board with terminal blocks 9 on its own. A safety capacitor 4 and a grounding structure 5 are provided on terminal circuit board 1. The safety capacitor 4 and grounding structure 5 can be electrically connected to terminal circuit board 1 through the lines on terminal circuit board 1. The safety capacitor 4 is a capacitor used to limit the safety risks that may arise from electrical faults in electronic equipment. The grounding structure 5 is a structure that connects designated lines on terminal circuit board 1 to the earth. The grounding structure 5 can be a through-hole on terminal circuit board 1. A grounding screw can be inserted into the through-hole, and by contacting the lines inside the circuit board with the grounding screw, and installing the grounding screw onto a grounding component, the relevant lines are grounded.

[0038] EMC circuit board 2 is a circuit board designed and manufactured with electromagnetic compatibility fully considered. It ensures that the electronic equipment on the circuit board operates normally in an electromagnetic environment, and that its own electromagnetic radiation complies with specified limits, while also providing a certain degree of resistance to external electromagnetic interference. The circuitry on EMC circuit board 2 can be connected to terminal circuit board 1 via contact or wires. The first conductive area 21 and the second conductive area 22 both refer to areas of a certain size located on the surface of EMC circuit board 2, which can be formed as exposed copper foil areas on the surface of EMC circuit board 2 through electroplating, etching, or engraving.

[0039] The conductive component 3 refers to a component that can conduct current or electrical signals. The conductive component 3 is usually made of materials such as metal or graphite. The conductive component 3 is brought into contact with the component or area that needs to be connected to achieve the connection.

[0040] The EMC structure provided in this embodiment of the utility model, by adding an EMC circuit board 2, connects the terminal circuit board 1 to the EMC circuit board 2. The EMC circuit board 2 can guide the lines of the safety capacitor 4 and the grounding structure 5 on the terminal circuit board 1 to a safe and convenient position, which can ensure that the electronic equipment on the circuit board operates normally in the electromagnetic environment and that the electromagnetic radiation generated by itself complies with the prescribed limits, so that the whole system has a certain resistance to external electromagnetic interference.

[0041] The EMC circuit board 2 has a first conductive region 21 and a second conductive region 22 that are electrically disconnected from each other. After the terminal circuit board 1 is connected to the EMC circuit board 2, the wiring arrangement connecting the terminal circuit board 1 and the EMC circuit board 2 enables the first conductive region 21 to be electrically connected to the safety capacitor 4 on the terminal circuit board 1, and the second conductive region 22 to be electrically connected to the grounding structure 5 on the terminal circuit board 1. Simultaneously, a conductive component 3 is also detachably installed on the EMC circuit board 2. When the conductive component 3 is installed on the EMC circuit board 2, it contacts both the first conductive region 21 and the second conductive region 22, achieving electrical conductivity between them, thereby enabling the safety capacitor 4 to be electrically connected to the grounding structure 5. After the conductive component 3 is removed from the EMC circuit board 2, the safety capacitor 4 is disconnected from the grounding structure 5.

[0042] Compared with the existing EMC structure, the safety capacitor 4 and the grounding structure 5 on the terminal circuit board 1 can be guided to a safe and convenient operation position. Then, the safety capacitor 4 and the grounding structure 5 can be disconnected and connected by removing and installing the conductive part 3. This makes the disconnectable operation of the EMC structure more convenient, allowing customers to freely choose the installation method according to the on-site application environment. It also improves the convenience and safety of equipment installation.

[0043] It should be noted that the connection between terminal circuit board 1 and EMC circuit board 2 can be achieved through circuit design, which is a conventional method well known to those skilled in the art, and will not be elaborated here.

[0044] In one embodiment, see Figure 4 The first conductive area 21 is located on the first surface of the EMC circuit board 2, and the second conductive area 22 is located on the second surface of the EMC circuit board 2. The positions of the first conductive area 21 and the second conductive area 22 are correspondingly arranged. Specifically, the first surface and the second surface refer to the two largest surfaces on the EMC circuit board 2, which can be understood as the front and back of the EMC circuit board 2. By setting the first conductive area 21 and the second conductive area 22 on the first surface and the second surface of the EMC circuit board 2 respectively, the positions of the first conductive area 21 and the second conductive area 22 can be correspondingly arranged, and the electrical disconnection between the first conductive area 21 and the second conductive area 22 can be made more convenient. This makes the layout of the circuit on the entire EMC circuit board 2 more reasonable and also reduces the overall size of the EMC circuit board 2.

[0045] In an optional embodiment, please refer to Figure 4 Both the first conductive region 21 and the second conductive region 22 can be rectangular in shape, which makes the processing of the first conductive region 21 and the second conductive region 22 more convenient.

[0046] In one embodiment, see Figure 6 The conductive component 3 includes a first abutting piece 31, a second abutting piece 32, and a connecting piece 33. The connecting piece 33 is connected between the first abutting piece 31 and the second abutting piece 32. The first abutting piece 31 and the second abutting piece 32 are used to abut against the first conductive region 21 and the second conductive region 22, respectively, to achieve electrical conduction between them. Specifically, the first abutting piece 31 and the second abutting piece 32 are both components with a certain length. The first abutting piece 31 and the second abutting piece 32 can be plate-shaped or sheet-shaped, etc., and can be components with a certain degree of elasticity. The connecting piece 33 is a component with a certain degree of elasticity, and the connecting piece 33 can be plate-shaped or sheet-shaped, etc. By connecting the connecting piece 33 between the first abutting piece 31 and the second abutting piece 32, and the connecting piece 33 applies a force to the first abutting piece 31 and the second abutting piece 32 to bring them closer together. When in use, the EMC circuit board 2 can be inserted between the first abutment piece 31 and the second abutment piece 32. Under the action of the connecting piece 33, the first abutment piece 31 and the second abutment piece 32 respectively abut against the first plate surface and the second plate surface of the EMC circuit board 2, so as to achieve the purpose of simultaneous contact between the conductive component 3 and the first conductive area 21 and the second conductive area 22, and also make the disassembly and installation of the conductive component 3 and the EMC circuit board 2 more convenient and quick.

[0047] In an optional embodiment, please refer to Figure 6 The first abutment piece 31, the second abutment piece 32, and the connecting piece 33 are integrally formed. Specifically, a metal spring can be bent into a U-shape or near-U-shape by stamping or other methods to improve the overall strength of the conductive component 3. For example, the conductive component 3 can be stamped from a highly elastic metal material. In this way, the metal elasticity of the first abutment piece 31 and the second abutment piece 32 can be used to abut against the first and second surfaces of the EMC circuit board 2, respectively, so as to achieve the purpose of simultaneous contact between the conductive component 3 and the first conductive area 21 and the second conductive area 22.

[0048] In one embodiment, see Figure 6The connecting piece 33 is connected between the first end of the first abutting piece 31 and the first end of the second abutting piece 32. The second end of the first abutting piece 31 is provided with an inclined guide portion 34 that tilts away from the second abutting piece 32, and the second end of the second abutting piece 32 is also provided with an inclined guide portion 34 that tilts away from the first abutting piece 31. Specifically, the inclined guide portion 34 refers to a portion with a certain inclination. By connecting the connecting piece 33 between the first end of the first abutting piece 31 and the first end of the second abutting piece 32, and simultaneously providing an inclined guide portion 34 at the second end of the first abutting piece 31 and the second end of the second abutting piece 32 that tilts away from the first abutting piece 31, the inclined guide portions 34 on the first abutting piece 31 and the second abutting piece 32 are arranged at an angle to each other. This provides guidance for the installation of the conductive component 3 when it is mounted onto the EMC circuit board 2, making the installation of the conductive component 3 more convenient.

[0049] In one embodiment, see Figure 4 and Figure 5 The EMC circuit board 2 has a first connecting portion 23, and the terminal circuit board 1 has a first insertion hole 11. The first connecting portion 23 and the first insertion hole 11 are interlocked. Multiple gold fingers 25 are provided on the surface of the first connecting portion 23. At least some of the gold fingers 25 are electrically connected to a first conductive area 21, and at least another portion of the gold fingers 25 are electrically connected to a second conductive area 22. When the first connecting portion 23 is inserted into the first insertion hole 11, the EMC circuit board 2 is electrically connected to the terminal circuit board 1 through the gold fingers 25. Specifically, the first connecting portion 23 refers to a component with a certain height, which is usually located on the end face of the EMC circuit board 2 and is formed by a portion protruding from the EMC circuit board 2 itself. The gold fingers 25 refer to the gold-plated conductive contact structures arranged like fingers on the edge of the printed circuit board. By providing the first connecting portion 23 on the EMC circuit board 2 and providing multiple gold fingers 25 on the surface of the first connecting portion 23... When connecting the EMC circuit board 2 and the terminal circuit board 1, the first connecting part 23 and the first insertion hole 11 can be plugged into each other. After the first connecting part 23 and the first insertion hole 11 are plugged into each other, the circuits on the EMC circuit board 2 can be electrically connected to the circuits on the terminal circuit board 1 through the gold fingers 25. While realizing the physical connection between the EMC circuit board 2 and the terminal circuit board 1, the electrical connection between the EMC circuit board 2 and the terminal circuit board 1 can also be realized, making the connection and assembly more convenient.

[0050] In one embodiment, see Figure 4 and Figure 5The EMC circuit board 2 is provided with a second connecting part 24, which is spaced apart from the first connecting part 23. The terminal circuit board 1 is provided with a second insertion hole 12, and the second connecting part 24 is inserted into the second insertion hole 12. Specifically, the second connecting part 24 refers to a component with a certain height. The second connecting part 24 is usually provided on the end face of the EMC circuit board 2 and can be formed by a portion protruding from the EMC circuit board 2 itself. The second connecting part 24 is spaced apart from the first connecting part 23, and can be inserted into the second insertion hole 12 when the EMC circuit board 2 and the terminal circuit board 1 are installed together. Together with the first connecting part 23, it forms a two-point positioning connection, making the installation of the EMC circuit board 2 more stable and avoiding poor contact.

[0051] In one specific embodiment, please refer to Figure 2 The EMC circuit board 2 and the terminal circuit board 1 are arranged perpendicularly to each other, and the EMC circuit board 2 and the safety capacitor 4 are both located on the same side of the terminal circuit board 1, which can make the structure of the whole system more compact, thereby saving the space occupied by the EMC structure.

[0052] In one embodiment, see Figures 2 to 4 The EMC structure also includes an insulating isolator 6, which insulates the first conductive area 21 and the second conductive area 22 from the terminal circuit board 1. The EMC circuit board 2 has a mounting slot 26 for mounting the insulating isolator 6, and the insulating isolator 6 is inserted into the mounting slot 26. Specifically, the insulating isolator 6 refers to a component with good insulation performance. The insulating isolator 6 is generally a plate-like structure and can be made of insulating paper, ceramic, or plastic. By providing the mounting slot 26 on the EMC circuit board 2, the insulating isolator 6 can be secured in the area between the first conductive area 21 and / or the second conductive area 22 and the terminal circuit board 1, insulating the first conductive area 21 and the second conductive area 22 from the terminal circuit board 1, preventing discharge breakdown and making the EMC structure safer to use.

[0053] In an optional embodiment, please refer to Figure 3 The mounting slot 26 is arranged in a direction parallel to the terminal circuit board 1, and the insulating isolation member 6 includes a first isolation part and a second isolation part, which are arranged at an angle. By inserting the first isolation part into the mounting slot 26, the second isolation part extends from the opening of the mounting slot 26 toward the direction close to the terminal circuit board 1, so that the insulating isolation member 6 can provide insulation isolation in multiple directions, thereby improving the overall insulation isolation effect of the insulating isolation member 6.

[0054] Secondly, please refer to Figure 7 and Figure 8A frequency converter is provided, including a protective housing 7 and an EMC structure as described above. The EMC structure is disposed within the protective housing 7. The protective housing 7 also has a clearance opening 71 for inserting a conductive component 3 from outside the protective housing 7 into the protective housing 7. Specifically, the protective housing 7 refers to a shell-shaped component with a certain volume. When using the EMC structure, the EMC structure can be installed on a heat sink 8, and then the protective housing 7 can be fastened to the outside of the EMC structure to form the main body of the frequency converter. The clearance opening 71 refers to a hole structure with a certain area. By providing a clearance opening 71 on the protective housing 7, and by ensuring that the shape of the clearance opening 71 matches the shape of the conductive component 3, the conductive component 3 can be installed onto the EMC circuit board 2 located inside the protective housing 7 through the clearance opening 71. Furthermore, after the conductive component 3 is installed onto the EMC circuit board 2, the clearance opening 71 can be sealed by the conductive component 3. This allows the installation of the conductive component 3 without affecting the overall appearance of the protective housing 7, making the overall appearance of the equipment more complete and aesthetically pleasing, and ensuring safe operation.

[0055] In one embodiment, see Figure 6 The clearance opening 71 is also equipped with a guide angle C-angle 73, which guides the installation and removal of the conductive component 3. The conductive component 3 has a slot 35 that matches the guide angle C-angle 73. Specifically, the guide angle C-angle 73 makes it easier for the conductive component 3 to be inserted into the clearance opening 71. The slot 35 facilitates the removal of the conductive component 3. When the conductive component 3 needs to be removed, a screwdriver or other tool can be inserted into the slot 35, and the conductive component 3 can be removed from the EMC circuit board 2 by lever principle.

[0056] In one embodiment, see Figure 9 A limiting part 72 is provided at the clearance opening 71. The limiting part 72 is used to limit the conductive component 3 and control the insertion depth of the conductive component 3. Specifically, the limiting part 72 is a component with a certain length. The limiting part 72 can be set across the entire clearance opening 71 along the axial direction of the clearance opening 71. The limiting part 72 can be an additional component installed on the protective shell 7, or the limiting part 72 can be integrally formed with the protective shell 7, for example, by injection molding. After the conductive component 3 is installed to a certain depth, it can contact the limiting part 72 to prevent the conductive component 3 from being inserted into a deeper position, making the installation position of the conductive component 3 more accurate and the installation safer.

[0057] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. An EMC structure, characterized in that, The device includes a terminal circuit board (1), an EMC circuit board (2), and a conductive component (3). The terminal circuit board (1) has a safety capacitor (4) and a grounding structure (5). The EMC circuit board (2) has a first conductive area (21) and a second conductive area (22). The first conductive area (21) and the second conductive area (22) are electrically disconnected from each other. The first conductive area (21) is electrically connected to the safety capacitor (4) through the lines on the terminal circuit board (1) and the EMC circuit board (2). The second conductive area (22) is electrically connected to the grounding structure (5) through the lines on the terminal circuit board (1) and the EMC circuit board (2). The conductive component (3) is detached and installed on the EMC circuit board (2). When the conductive component (3) is installed on the EMC circuit board (2), the conductive component (3) is in contact with both the first conductive area (21) and the second conductive area (22) to achieve electrical conduction between them.

2. The EMC structure as described in claim 1, characterized in that, The first conductive area (21) is located on the first board surface of the EMC circuit board (2), and the second conductive area (22) is located on the second board surface of the EMC circuit board (2). The positions of the first conductive area (21) and the second conductive area (22) are respectively set.

3. The EMC structure as described in claim 2, characterized in that, The conductive element (3) includes a first abutting piece (31), a second abutting piece (32), and a connecting piece (33). The connecting piece (33) is connected between the first abutting piece (31) and the second abutting piece (32). The first abutting piece (31) and the second abutting piece (32) are used to abut against the first conductive area (21) and the second conductive area (22) respectively to achieve electrical conduction between the two.

4. The EMC structure as described in claim 3, characterized in that, The connecting piece (33) is connected between the first end of the first abutting piece (31) and the first end of the second abutting piece (32). The second end of the first abutting piece (31) is provided with an inclined guide portion (34) that is inclined away from the second abutting piece (32), and the second end of the second abutting piece (32) is provided with an inclined guide portion (34) that is inclined away from the first abutting piece (31).

5. The EMC structure as described in any one of claims 1 to 4, characterized in that, The EMC circuit board (2) has a first connecting part (23), and the terminal circuit board (1) has a first plug hole (11). The first connecting part (23) and the first plug hole (11) are plugged into each other. The surface of the first connecting part (23) is provided with a plurality of gold fingers (25). At least some of the gold fingers (25) are electrically connected to the first conductive area (21), and at least another part of the gold fingers (25) are electrically connected to the second conductive area (22). When the first connecting part (23) is plugged into the first plug hole (11), the EMC circuit board (2) is electrically connected to the terminal circuit board (1) through the gold fingers (25).

6. The EMC structure as described in claim 5, characterized in that, The EMC circuit board (2) is provided with a second connection part (24), the second connection part (24) is spaced apart from the first connection part (23), the terminal circuit board (1) is provided with a second insertion hole (12), and the second connection part (24) is inserted into the second insertion hole (12).

7. The EMC structure according to any one of claims 1 to 4, characterized in that, The EMC structure also includes an insulating isolator (6), which is used to insulate the first conductive area (21) and the second conductive area (22) from the terminal circuit board (1). The EMC circuit board (2) is provided with a mounting slot (26) for mounting the insulating isolator (6), and the insulating isolator (6) is inserted into the mounting slot (26).

8. A frequency converter, characterized in that, The device includes a protective housing (7) and an EMC structure as described in any one of claims 1 to 7, wherein the EMC structure is disposed within the protective housing (7), and the protective housing (7) is further provided with a clearance opening (71) for the conductive element (3) to be inserted into the protective housing (7) from outside the protective housing (7).

9. The frequency converter as described in claim 8, characterized in that, The clearance opening (71) is also provided with a guide clearance C-angle (73), which is used to guide the installation and disassembly of the conductive component (3). The conductive component (3) is provided with a slot (35) that matches the guide clearance C-angle (73).

10. The frequency converter as described in claim 8, characterized in that, A limiting part (72) is provided at the clearance opening (71), and the limiting part (72) is used to limit the conductive element (3) to control the insertion depth of the conductive element (3).

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