High-voltage-resistant large-ripple-current differential-mode conducted interference suppression X2 capacitor

Abstract

The utility model provides a high voltage resistant large ripple current differential mode conducted interference suppression X2 capacitor, which comprises a shell and a capacitor core body arranged in the shell, the capacitor core body is fixed in the shell, two chromium-plated leads are arranged on two sides of the lower end of the capacitor core body, a reinforcing rib is arranged on the inner front wall of the shell, and the outer wall of the shell is provided with a copper wire. Heat conduction pieces are arranged in the upper area and the lower area between the shell and the capacitor core body, each heat conduction piece comprises a heat conduction gasket and a heat conduction needle, a plurality of heat conduction needles are arranged in the upper area between the shell and the capacitor core body, and a plurality of heat conduction gaskets are arranged in the lower area between the shell and the capacitor core body. The X2 capacitor has the beneficial effects that the distance from the chromium-plated lead to the surface of the shell is increased by adding the reinforcing rib structure inside, so that the moistureproof capability of the X2 capacitor is improved, and the capacitance failure can be delayed; the heat conduction piece can transmit part of heat generated by the ripple current to the outer side of the shell along the heat conduction piece, so that the heat dissipation performance is improved, and the high-voltage large ripple current resistance is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitors, and particularly relates to an X2 capacitor with high-voltage and large-ripple current resistance for suppressing differential-mode conduction interference. Background Technique

[0002] The X2 capacitor is an important device in the power system. Capacitors play an important role in circuits such as tuning, bypassing, coupling, and filtering. Existing X2 capacitors have deficiencies: the heat generated by applying high-voltage and large-ripple current during the operation of the capacitor cannot be dissipated, reducing the heat dissipation performance; the moisture-proof ability is poor, reducing the service life. Content of the Utility Model

[0003] Based on the problems in the above background, the purpose of the utility model is to provide an X2 capacitor with high-voltage and large-ripple current resistance for suppressing differential-mode conduction interference, which enhances the high-voltage and large-ripple current resistance performance, improves its heat dissipation, and enhances the moisture-proof performance.

[0004] The technical solution of the utility model is: an X2 capacitor with high-voltage and large-ripple current resistance for suppressing differential-mode conduction interference, including a housing and a capacitor core arranged in the housing. The capacitor core is fixed inside the housing. Two chromium-plated leads are arranged on both sides of the lower end of the capacitor core. Two bases corresponding to the chromium-plated leads are arranged on the outer side of the bottom wall of the housing. Through holes are correspondingly arranged on the bases and the bottom wall of the housing. Each chromium-plated lead sequentially passes through the through hole on the corresponding base and the through hole on the bottom wall of the housing and is located outside the housing. A reinforcing rib is arranged on the front wall inside the housing.

[0005] Thermal conductive parts are arranged in both the upper area and the lower area between the housing and the capacitor core. The thermal conductive parts include thermal conductive gaskets and thermal conductive needles. A plurality of thermal conductive needles are arranged in the upper area between the housing and the capacitor core, and a plurality of thermal conductive gaskets are arranged in the lower area. The capacitor core includes a polyester film, and a metal coating is adhered to the polyester film. The left and right edges of the metal coating and the polypropylene film are both wavy edges and overlap each other.

[0006] Further, a rubber ring is arranged between the chromium-plated lead and the through hole on the base.

[0007] Further, the capacitor core is fixed to the thermal conductive gasket, the capacitor core is fixed to the thermal conductive needle, and the thermal conductive gasket and the thermal conductive needle are fixed to the housing through epoxy potting adhesive.

[0008] Further, a surge suppression shielding layer is filled in the left and right areas between the housing and the capacitor core. The surge suppression shielding layer is a ferrite layer.

[0009] The advantages and positive effects of the present utility model are as follows: By adopting the above technical solution, with the addition of a rib structure inside, the distance from the chrome-plated lead to the outer surface of the housing is increased, thereby improving the moisture-proof ability of the X2 capacitor and delaying capacitance decay; the heat-conducting component can transfer part of the heat generated by the ripple current along the heat-conducting component to the outside of the housing, improving its heat dissipation performance and enhancing its performance of withstanding high voltage and large ripple current. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0011] Figure 2 is a schematic diagram of the rib structure inside the housing.

[0012] In the figure:

[0013] 1, housing; 2, capacitor core; 3, chrome-plated lead

[0014] 4, base; 5, rib; 6, heat-conducting gasket

[0015] 7, heat-conducting pin; 8, surge suppression shielding layer DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] As Figure 1 , 2 shown, the technical solution of the present utility model is: An X2 capacitor for suppressing differential-mode conduction interference withstanding high voltage and large ripple current, comprising a housing 1 and a capacitor core 2 provided inside the housing 1. The capacitor core 2 is fixedly arranged inside the housing 1. On both sides of the lower end of the capacitor core 2, there are two chrome-plated leads 3. On the outer side of the bottom wall of the housing 1, there are two bases 4 corresponding to the chrome-plated leads 3. Through holes are correspondingly provided on both the bases 4 and the bottom wall of the housing 1. Each chrome-plated lead 3 sequentially passes through the through hole on the corresponding base 4 and the through hole on the bottom wall of the housing 1 and is located outside the housing 1. A rib 5 is provided on the front wall inside the housing 1. By adding a rib structure inside, the distance from the chrome-plated lead to the outer surface of the housing is increased, thereby improving the moisture-proof ability of the X2 capacitor;

[0017] Heat-conducting components are provided in both the upper region and the lower region between the housing 1 and the capacitor core 2. The heat-conducting components include a heat-conducting gasket 6 and a heat-conducting pin 7. A plurality of heat-conducting pins 7 are provided in the upper region between the housing 1 and the capacitor core 2, and a plurality of heat-conducting gaskets 6 are provided in the lower region. Part of the heat generated by applying a ripple current during the operation of the capacitor can be transferred to the housing through the heat-conducting gasket and then dissipated from the housing, thereby improving the heat dissipation performance of the capacitor;

[0018] The described capacitor core 2 includes a polyester film, on which a metal coating is attached. The left and right edges of both the metal coating and the polypropylene film are wavy edges and overlap with each other. The use of the polyester film enables it to have the ability to withstand high voltage and large ripple current, so as to eliminate differential mode interference.

[0019] In this embodiment, a rubber ring is provided between the chromium-plated lead 3 and the perforation on the base 4.

[0020] In this embodiment, the capacitor core 2 is fixed to the heat-conducting gasket 6, the capacitor core 2 is fixed to the heat-conducting pin 7, and the heat-conducting gasket 6 and the heat-conducting pin 7 are fixed to the housing 1 through epoxy potting adhesive.

[0021] In this embodiment, a surge suppression shielding layer is filled in the left and right areas between the housing 1 and the capacitor core 2. The surge suppression shielding layer 8 is a ferrite layer. Under the action of the surge suppression shielding layer 8, the surge current generated in the power supply device can be suppressed, and the service life of the component can be prolonged.

[0022] The above has described in detail an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A high-voltage-resistant and large-ripple-current-suppressing differential-mode conducted interference X2 capacitor, characterized in that: It includes a housing, and a capacitor core body is provided inside the housing. The capacitor core body is fixed inside the housing. Two chromium-plated leads are provided on both sides of the lower end of the capacitor core body. Two bases corresponding to the chromium-plated leads are provided on the outer side of the bottom wall of the housing. Through holes are correspondingly provided on both the base and the bottom wall of the housing. Each chromium-plated lead sequentially passes through the through hole on the corresponding base and the through hole on the bottom wall of the housing and is located outside the housing. A reinforcing rib is provided on the front wall inside the housing. Heat-conducting members are provided in both the upper region and the lower region between the housing and the capacitor core body. The heat-conducting member includes a heat-conducting gasket and a heat-conducting needle. A plurality of heat-conducting needles are provided in the upper region between the housing and the capacitor core body, and a plurality of heat-conducting gaskets are provided in the lower region. The capacitor core body includes a polyester film, and a metal coating is laminated on the polyester film. The left and right edges of the metal coating and the polypropylene film are both wavy edges and overlap each other.

2. The X2 capacitor for suppressing differential-mode conducted interference with high voltage resistance and large ripple current according to claim 1, characterized in that: A rubber ring is provided between the chromium-plated lead and the through hole on the base.

3. A high-voltage resistant and large ripple current suppressing differential mode conducted interference X2 capacitor according to claim 1, characterized in that: The capacitor core body is fixed to the heat-conducting gasket, the capacitor core body is fixed to the heat-conducting needle, and the heat-conducting gasket and the heat-conducting needle are fixed to the housing by epoxy potting adhesive.

4. A high-voltage-resistant and large-ripple-current-suppressing differential-mode conducted-interference X2 capacitor according to claim 1, wherein: A surge suppression shielding layer is filled in the left and right regions between the housing and the capacitor core body. The surge suppression shielding layer is a ferrite layer.

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