Electromagnetic shielding type capacitor

Abstract

The utility model discloses an electromagnetic shielding type capacitor, and particularly relates to the technical field of capacitors, the electromagnetic shielding type capacitor comprises a main body mechanism and a connecting assembly, the outer diameter surface of the main body mechanism is provided with the connecting assembly, and the main body mechanism comprises a shielding assembly, a capacitor assembly and a cover plate assembly. The electromagnetic shielding type capacitor comprises a capacitor assembly, a shielding assembly is placed on the outer diameter surface of the capacitor assembly, a cover plate assembly is installed on the side face of the shielding assembly, an electromagnetic shielding layer is additionally arranged on the electromagnetic shielding type capacitor through the shielding assembly, and a metal shell of the capacitor is made of permalloy with the electromagnetic shielding performance. External electromagnetic interference can be effectively prevented from entering the capacitor, electromagnetic radiation generated by the capacitor is limited to a certain degree, and interference to other surrounding electronic elements and circuits is reduced.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and more specifically, to an electromagnetically shielded capacitor. Background Technology

[0002] A capacitor is an electronic component that can store electric charge and electric field energy. It usually consists of two conductor plates that are close to each other and insulated from each other. The space between these two plates can be a vacuum or filled with various dielectric materials, such as air, ceramics, and plastic films. In communication devices such as radios, televisions, and mobile phones, capacitors are mainly used for circuit functions such as tuning, filtering, and coupling. On computer motherboards, a large number of capacitors are used to stabilize the power supply voltage, provide clean DC power to components such as chips, and ensure the normal operation of the circuit.

[0003] A search revealed that CN119296962A discloses a capacitor with high-efficiency heat dissipation, comprising a capacitor core, a protective shell, an air-cooling system, a drive module, and a dynamic heat-conducting component. The protective shell has heat dissipation holes on its surface. The air-cooling system includes a cooling fan assembly, a heat sink, and a support component. The drive module includes a drive unit, a rotating housing, and a limiting pin. The dynamic heat-conducting component includes a heat-conducting rod, a fan-shaped block, a heat-conducting sheet, an elastic sheet, and a pressure block. Heat on the surface of the capacitor core can be directly conducted through the heat-conducting sheet, the annular heat sink, the radial heat sink, and the support frame. When air passes through the heat-conducting sheet, the annular heat sink, the radial heat sink, and the support frame, the cooling efficiency of the capacitor core surface is improved. When the drive unit drives the rotating housing, the lifting ring, the limiting pin, and the dynamic heat-conducting component to rotate as a whole, the elastic sheet makes uniform contact with the capacitor core surface, further improving the uniformity and efficiency of cooling the capacitor core surface. The inventors discovered the following problems in the prior art during the development of this utility model:

[0004] Existing capacitors, lacking shielding measures, are more susceptible to external electromagnetic interference. External electromagnetic fields can induce currents and voltages within the capacitor, altering its operating state and affecting its performance stability. For example, in strong electromagnetic environments, the capacitance of existing capacitors may fluctuate, causing changes in circuit parameters. Furthermore, traditional capacitors typically lack dedicated electromagnetic shielding designs, easily radiating electromagnetic energy into the surrounding space during operation, interfering with other nearby electronic components and circuits, and impacting the electromagnetic compatibility of the entire system. For instance, in some high-frequency circuits, electromagnetic interference generated by traditional capacitors can lead to signal distortion and reduced communication quality.

[0005] Therefore, an electromagnetically shielded capacitor is proposed to address the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electromagnetically shielded capacitor to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetically shielded capacitor, comprising a main body and a connecting assembly, wherein the connecting assembly is mounted on the outer diameter surface of the main body, and the main body includes a shielding assembly, a capacitor assembly and a cover assembly, wherein the shielding assembly is placed on the outer diameter surface of the capacitor assembly, and the cover assembly is mounted on the side of the shielding assembly.

[0008] Preferably, the shielding assembly includes a metal shell, an insulating gasket, and a shielding layer connecting piece, wherein the insulating gasket is placed on the inner diameter surface of the metal shell, and the shielding layer connecting piece is installed below the metal shell.

[0009] Preferably, the capacitor assembly includes a capacitor core, electrode leads, and an insulating sleeve, with the electrode leads mounted on the side of the capacitor core and the insulating sleeve placed on the side of the electrode leads away from the capacitor core.

[0010] Preferably, the connecting assembly includes a locating pin, a fixing nut, and an anti-loosening nut washer, and the fixing nut is placed on the side of the locating pin, and the anti-loosening nut washer is placed on the outer diameter surface of the fixing nut.

[0011] Preferably, the cover assembly includes an end cap, a sealing rubber ring, and a heat sink, with the heat sink mounted on the side of the end cap and the sealing rubber ring placed on the inner diameter surface of the end cap.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] Compared with existing technologies, this electromagnetically shielded capacitor adds an electromagnetic shielding layer to its structure through a shielding assembly. The metal shell of the capacitor is made of permalloy, which has electromagnetic shielding properties, effectively blocking external electromagnetic interference from entering the capacitor and limiting the electromagnetic radiation generated by the capacitor itself, thus reducing interference to other electronic components and circuits in the vicinity. The shielding layer connecting piece in the shielding assembly is made of aluminum with good conductivity, which can connect the shielding assembly to the grounding system of the equipment, ensuring that the shielding assembly can effectively introduce the induced electromagnetic interference current into the ground.

[0014] Compared with existing technologies, this electromagnetically shielded capacitor makes it easier to fix the capacitor to other components through the connecting components. The cylindrical structure of the magnetically shielded cylindrical capacitor has better symmetry and consistency, making it easier to achieve standardization and modularization during installation. The anti-loosening nut washer on the connecting components prevents the capacitor from shifting its position when subjected to vibration. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an electromagnetically shielded capacitor according to the present invention.

[0016] Figure 2 This is a side cross-sectional view of the capacitor assembly of an electromagnetic shielded capacitor according to the present invention.

[0017] Figure 3 This is a side view cross-sectional structural diagram of the insulating sleeve of an electromagnetic shielding capacitor according to the present invention.

[0018] Figure 4 This is a side cross-sectional view of the cover plate assembly of an electromagnetic shielding capacitor according to the present invention.

[0019] The attached figures are labeled as follows: 1. Main body; 2. Connecting assembly; 3. Shielding assembly; 4. Capacitor assembly; 5. Cover assembly; 6. Metal shell; 7. Insulating gasket; 8. Shielding layer connecting piece; 9. Capacitor core; 10. Electrode lead-out end; 11. Insulating sleeve; 12. Positioning pin; 13. Fixing nut; 14. Anti-loosening nut washer; 15. End cap; 16. Sealing rubber ring; 17. Heat sink. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] As attached Figures 1 to 4 An electromagnetically shielded capacitor is shown, comprising a main body 1 and a connecting component 2. The connecting component 2 is mounted on the outer diameter surface of the main body 1. The main body 1 includes a shielding component 3, a capacitor component 4, and a cover component 5. The shielding component 3 is placed on the outer diameter surface of the capacitor component 4, and the cover component 5 is mounted on the side of the shielding component 3.

[0022] Among them: when the capacitor is fixed in the equipment by the connecting component 2, the shielding component 3 of its main body 1 can ensure that the capacitor component 4 will not be interfered with by the electromagnetic energy emitted by adjacent components during operation. Moreover, the electromagnetic energy emitted by the capacitor during operation is reduced to the interference of external components due to the shielding of the shielding component 3. The cover component 5 not only facilitates heat dissipation inside the capacitor, but also allows for timely replacement and repair of the internal components of the capacitor when they are damaged by opening the cover component 5. Example 2

[0023] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0024] In a preferred embodiment, the shielding assembly 3 includes a metal shell 6, an insulating pad 7, and a shielding layer connecting piece 8. The insulating pad 7 is placed on the inner surface of the metal shell 6, and the shielding layer connecting piece 8 is bolted to the bottom of the metal shell 6. The metal shell 6 is made of a cylindrical metal material with high magnetic permeability and high electrical conductivity, tightly wrapping the capacitor assembly 4 and shielding it from external electromagnetic interference. At the same time, the metal shell 6 can also limit the internal electric field within a certain range to prevent it from affecting the external circuit. The insulating pad 7 is placed between the capacitor core 9 and the bottom of the metal shell 6 to prevent the capacitor core 9 from short-circuiting with the shell, and at the same time plays a role in buffering and shock absorption. The shielding layer connecting piece 8 connects the metal shell 6 to the grounding terminal of the equipment and effectively grounds the shielding assembly 3, enhancing the electromagnetic shielding effect and ensuring that the capacitor works normally in a complex electromagnetic environment.

[0025] In a preferred embodiment, the capacitor assembly 4 includes a capacitor core 9, an electrode lead 10, and an insulating sleeve 11. The electrode lead 10 is mounted on the side of the capacitor core 9, and the capacitor core 9 and the electrode lead 10 are connected by a wire. The insulating sleeve 11 is placed on the side of the electrode lead 10 away from the capacitor core 9. The capacitor core 9 is formed by alternating stacking and winding of ceramic dielectric and metal electrodes, and is the core component for storing charge. One end of the electrode lead 10 is connected to the electrode inside the capacitor core 9, and the other end passes through the shielding assembly 3 for connecting to an external circuit to realize the input and output of charge. The insulating sleeve 11 is fitted over the part of the electrode lead 10 that passes through the shielding assembly 3 to ensure electrical insulation between the electrode lead 10 and the outer casing.

[0026] In a preferred embodiment, the connecting assembly 2 includes a locating pin 12, a fixing nut 13, and an anti-loosening nut washer 14. The fixing nut 13 is placed on the side of the locating pin 12, and the anti-loosening nut washer 14 is placed on the outer diameter surface of the fixing nut 13. The locating pin 12 can ensure the accuracy of capacitor installation, while the fixing nut 13 can fix the capacitor to the equipment. When installing the capacitor, the worker needs to place the anti-loosening nut washer 14 on the outer diameter surface of the fixing nut 13, which can prevent the capacitor from shifting due to equipment vibration after it is fixed.

[0027] In a preferred embodiment, the cover assembly 5 includes an end cap 15, a sealing rubber ring 16, and a heat sink 17. The heat sink 17 is mounted on the side of the end cap 15, and the sealing rubber ring 16 is placed on the inner diameter surface of the end cap 15. The end cap 15 can form a sealed space for the capacitor and protect the capacitor assembly 4. The sealing rubber ring 16 can seal the gap between the end cap 15 and the metal shell 6 of the shielding assembly 3 when they are threaded together. The heat sink 17 can increase the contact area between the end cap 15 and the air, making the heat dissipation efficiency of the end cap 15 better.

[0028] The working process of this utility model is as follows: First, the capacitor is positioned on the equipment to be installed by the positioning pin 12 of the connecting component 2. Then, the capacitor is fixed in the equipment by the anti-loosening nut washer 14 and the fixing nut 13. The shielding component 3 of its main body 1 can ensure that the capacitor component 4 will not be interfered with by the electromagnetic energy emitted by adjacent components during operation. The shielding component 3 is composed of a metal shell 6, an insulating gasket 7 and a shielding layer connecting piece 8. The metal shell 6 is made of a cylindrical metal material with high magnetic permeability and high conductivity, which tightly wraps the capacitor component 4 and is used to shield external electromagnetic interference. At the same time, the metal shell 6 can also limit the internal electric field within a certain range to prevent it from affecting the external circuit. The insulating gasket 7 is placed between the capacitor core 9 and the bottom of the metal shell 6 to prevent the capacitor core 9 from short-circuiting with the shell, and at the same time plays a role in buffering and shock absorption. The shielding layer connecting piece 8 connects the metal shell 6 to the grounding terminal of the equipment and effectively grounds the shielding component 3, enhancing the electromagnetic shielding effect and ensuring that the capacitor works normally in a complex electromagnetic environment.

[0029] Furthermore, the electromagnetic energy emitted by the capacitor during operation is shielded by the shielding component 3, reducing interference to external components. The capacitor assembly 4 consists of a capacitor core 9, electrode leads 10, and an insulating sleeve 11. The capacitor core 9 is formed by alternating stacking and winding of ceramic dielectric and metal electrodes, and is the core component for storing charge. One end of the electrode lead 10 is connected to the electrode inside the capacitor core 9, and the other end passes through the shielding component 3 to connect to the external circuit, realizing the input and output of charge. The insulating sleeve 11 is fitted over the part where the electrode lead 10 passes through the shielding component 3 to ensure electrical insulation between the electrode lead 10 and the outer shell. The heat sink 17 of the cover assembly 5 facilitates heat dissipation inside the capacitor. The end cover 15 of the cover assembly 5 can also be opened to replace and repair the internal components of the capacitor in a timely manner when the components inside the capacitor are damaged. The sealing rubber ring 16 can seal the gap between the end cover 15 and the metal shell 6 when they are threaded together. The above is the working principle of this electromagnetic shielded capacitor.

Claims

1. An electromagnetic shielded capacitor comprising a main body mechanism (1) and a connecting assembly (2), characterized in that: The outer diameter surface of the main body (1) is equipped with a connecting component (2), and the main body (1) includes a shielding component (3), a capacitor component (4) and a cover component (5), and the outer diameter surface of the capacitor component (4) is provided with a shielding component (3), and the side of the shielding component (3) is equipped with a cover component (5).

2. The electromagnetic shielding capacitor according to claim 1, wherein: The shielding assembly (3) includes a metal shell (6), an insulating pad (7) and a shielding layer connecting piece (8), and the insulating pad (7) is placed on the inner diameter surface of the metal shell (6), and the shielding layer connecting piece (8) is installed below the metal shell (6).

3. The electromagnetic shielding capacitor of claim 1, wherein: The capacitor assembly (4) includes a capacitor core (9), an electrode lead-out end (10) and an insulating sleeve (11), and the electrode lead-out end (10) is installed on the side of the capacitor core (9), and the insulating sleeve (11) is placed on the side of the electrode lead-out end (10) away from the capacitor core (9).

4. The electromagnetic shielding capacitor of claim 1, wherein: The connecting assembly (2) includes a positioning pin (12), a fixing nut (13) and a locking nut washer (14), and the fixing nut (13) is placed on the side of the positioning pin (12), and the locking nut washer (14) is placed on the outer diameter surface of the fixing nut (13).

5. The electromagnetic shielding capacitor of claim 1, wherein: The cover assembly (5) includes an end cap (15), a sealing rubber ring (16) and a heat sink (17), and the heat sink (17) is installed on the side of the end cap (15), and the sealing rubber ring (16) is placed on the inner diameter surface of the end cap (15).

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