Inrush current and harmonic wave resistant double-sided plated metallized film capacitor

Abstract

The utility model provides an anti-inrush current anti-harmonic wave double-sided plated metallized film capacitor, which comprises a shell, pins, a core body and a metal spraying layer, the core body is arranged in the shell, the metal spraying layer is filled between the shell and the core body, a plurality of bulges are arranged on the periphery of the outer side of the core body, the two pins are connected with the metal spraying layer through leads, and the two pins are connected with the metal spraying layer through the leads. The core body is sequentially provided with an outer metallized film, an outer light film, an inner metallized film and an inner light film from outside to inside, the outer metallized film comprises a film body, the two surfaces of the film body are subjected to corona treatment, metallized films are evaporated on the two surfaces of the film body, and the inner metallized film is a double-margined metallized T-shaped safety film. The beneficial effects of the utility model are that two layers of metallized films are used, so that the inrush current resistance and harmonic current resistance of the capacitor are improved; meanwhile, the outer metallized film is subjected to corona treatment, so that the adhesive force of the evaporation metal film is enhanced; and the double-margin metalized T-shaped safety film is adopted, so that the reliability of the capacitor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of film capacitors, in particular to an anti-surge and anti-harmonic double-sided metallized film capacitor. Background Art

[0002] Metallized film capacitors have a wide range of applications, and their main functions are charging, discharging and storing electrical energy. Currently, due to the poor bonding between the gold spray layer and the film coating, their ability to resist surge and harmonic currents is relatively poor, which reduces their service life; the capacitor's ability to withstand high currents is poor, and its reliability is reduced. Utility Model Content

[0003] Based on the problems arising in the above background, the purpose of the utility model is to provide a double-sided metallized film capacitor with surge resistance and harmonic resistance, which improves reliability, increases the effective contact area between the gold spray layer and the capacitor core, and improves the capacitor's ability to resist surge and harmonic currents.

[0004] The technical scheme of the utility model is: a double-sided metallized film capacitor with surge and harmonic resistance, comprising a shell, a pin, a core body, and a gold spraying layer, wherein the core body is arranged inside the shell, the gold spraying layer is filled between the shell and the core body, a plurality of protrusions are arranged around the outer circumference of the core body, two pins are connected to the gold spraying layer through leads, the core body comprises an outer metallized film, an outer light film, an inner metallized film, and an inner light film arranged in sequence from the outside to the inside, the outer metallized film comprises a film body, and both sides of the film body are subjected to corona treatment, the film body is double-sided evaporated with a metallized film, and the inner metallized film is a double-edge metallized T-shaped safety film.

[0005] Furthermore, a through hole for the pin to pass through is provided at the upper end of the shell, and the pin is fixed at the through hole.

[0006] Furthermore, the core body is formed by winding an outer metallized film, an outer glossy film, an inner metallized film, and an inner glossy film, and the outer metallized film, the outer glossy film, the inner metallized film, and the inner glossy film are arranged in sequence from the outside to the inside, and the protrusion is located on the outside of the core body and on the outside of the outer metallized film, and is integrally arranged with it.

[0007] Furthermore, a flame retardant sheet is provided around the outer circumference of the shell, and the flame retardant sheet is a PET flame retardant sheet.

[0008] The advantages and positive effects of the utility model are as follows: by adopting the above technical scheme, two layers of metallized film are used to improve the bonding strength between the gold spraying layer and the film coating, and the ability of the capacitor to resist surge current and harmonic current is improved; at the same time, the outer metallized film is subjected to corona treatment to enhance the adhesion of the evaporated metal film; a double-edge metallized T-shaped safety film is used to improve the reliability of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Figure 2 It is a cross-sectional view of the core.

[0011] In the figure: DETAILED DESCRIPTION

[0012] like Figure 1-2 As shown, the technical solution of the utility model is: an anti-surge and anti-harmonic double-sided metallized film capacitor, comprising a shell 1, pins 2, a core 3, and a gold spraying layer 4, wherein the shell 1 is provided with the core 3, the shell 1 and the core 3 are filled with the gold spraying layer 4, a plurality of protrusions 5 are provided around the outer circumference of the core 3, and two pins 2 are connected to the gold spraying layer 4 through leads,

[0013] The core body 3 includes an outer metallized film 6, an outer glossy film 7, an inner metallized film 8, and an inner glossy film 9, which are arranged in sequence from the outside to the inside. The outer metallized film 6 includes a film body, and both sides of the film body are corona treated. The film body is double-sided evaporated with metallized film. Since both sides of the film are corona treated, not only the adhesion of the evaporated film is improved, but also the closeness between the film layers is increased, the vibration of the film is reduced, and the noise is effectively reduced. The outer metallized film 6 and the inner metallized film 8 are used to improve the bonding strength between the gold spraying layer and the film coating, and the capacitor's ability to resist surge current and harmonic current is improved; the inner metallized film 8 is a double-edge metallized T-shaped safety film, which improves the reliability of the capacitor.

[0014] In this embodiment, a through hole is provided at the upper end of the housing 1 for the pin 2 to pass through, and the pin 2 is fixed at the through hole.

[0015] In this embodiment, the core body 3 is formed by winding an outer metallized film 6, an outer glossy film 7, an inner metallized film 8, and an inner glossy film 9, and the outer metallized film 6, the outer glossy film 7, the inner metallized film 8, and the inner glossy film 9 are arranged in sequence from the outside to the inside, and the protrusion 5 is located on the outside of the core body 3 and on the outside of the outer metallized film 6, and is integrally arranged therewith.

[0016] In this embodiment, a flame retardant sheet is provided around the outer circumference of the shell 1, and the flame retardant sheet is a PET flame retardant sheet (the flame retardant sheet is not drawn in the figure).

[0017] The working process and principle of this embodiment: the multiple protrusions 5 are set to increase the effective contact area between the gold spraying layer 4 and the capacitor core 3, thereby improving the current resistance of the capacitor; the two layers of metallized film are used to improve the bonding strength between the gold spraying layer and the film coating, thereby improving the capacitor's ability to resist surge current and harmonic current.

[0018] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A double-sided metallized film capacitor with surge and harmonic resistance, characterized in that: It includes an outer shell, a pin, a core body, and a gold-sprayed layer. The core body is arranged inside the outer shell, and the gold-sprayed layer is filled between the outer shell and the core body. A plurality of protrusions are arranged around the outer side of the core body. Two pins are connected to the gold-sprayed layer through leads. The core body includes an outer metallized film, an outer glossy film, an inner metallized film, and an inner glossy film, which are arranged from the outside to the inside. The outer metallized film includes a film body, and both sides of the film body are corona treated. The film body is double-sided evaporated with a metallized film, and the inner metallized film is a double-edge metallized T-shaped safety film.

2. The anti-surge and anti-harmonic double-sided metallized film capacitor according to claim 1, characterized in that: The upper end of the shell is provided with a through hole for the pin to pass through, and the pin is fixed at the through hole.

3. The anti-surge and anti-harmonic double-sided metallized film capacitor according to claim 1, characterized in that: The protrusion is located on the outside of the core body and on the outside of the outer metallized film, and is integrally arranged therewith.

4. The anti-surge and anti-harmonic double-sided metallized film capacitor according to claim 1, characterized in that: A flame retardant sheet is arranged around the outer circumference of the shell, and the flame retardant sheet is a PET flame retardant sheet.

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