CN202018886U

CN202018886U - Composite film medium filter capacitor

Info

Publication number: CN202018886U
Application number: CN2010206808758U
Authority: CN
Inventors: 胡枝清
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-10-26
Anticipated expiration: 2020-12-27

Abstract

The utility model discloses a composite film medium filter capacitor, which comprises a capacitor core, pins and an encapsulating layer, wherein the encapsulating layer wraps the capacitor core; the capacitor core is formed by sequentially superposing and coiling a polypropylene film plated with a metal layer and a metallized polyester film. The composite film medium filter capacitor is structurally characterized in that: a layer of polypropylene film is superposed on the outer side face of the metallized polyester film; the metal layer is formed by connecting an aluminium layer and a zinc layer, wherein the aluminium layer is an electrode face and the zinc layer is a reinforcing side; and the encapsulating layer is an epoxy resin curing layer. The composite film medium filter capacitor has the advantages that: the square resistance is low; the film layer is thickened, so the withstand voltage strength is increased, the side area is increased at the same time, and the contact surface of a metal spraying layer is increased; the loss value is stable; the conductivity is high; an anode and a cathode are not required to be identified; the energy storage density is high; the conductive area is large; and higher current can be born.

Description

The laminated film dielectric filter capacitor

Technical field:

The utility model relates to a kind of filtering capacitor, especially belongs to a kind of laminated film dielectric filter capacitor.

Background technology:

Filtering capacitor is applicable to the voltage filter in the electron rectifier, as: fields such as the switching power supply in computer, TV, a series of electrical equipment, electric ballast, be to be composited by metallized polyester, polypropylene film material, zinc-aluminium base material micro materials, at present, filtering capacitor all adopts electrolytic capacitor both at home and abroad, some capacitors are made up of electrolyte, aluminium-foil paper etc., not only volume is bigger for it, loss is big, the power of Xiao Haoing is also big at work, and both positive and negative polarity is arranged, bring hidden danger for installation administration.Because of electrolyte is a kind of liquid existence, all can produce certain temperature in the electric appliance and electronic line work, its temperature is relatively all than higher, electrolytic capacitor is worked in hot environment for a long time, electrolyte evaporates gradually, electrolyte in electrolytic capacitor is dry, and capacitor will lose its effect, quits work.Also reduced the useful life of capacitor.

Summary of the invention:

The purpose of this utility model is to provide a kind of laminated film dielectric filter capacitor, has withstand voltage height, volume is little; And it is little to consume energy, and can bear bigger electric current, and self-healing performance is good.

The purpose of this utility model is to realize like this, described laminated film dielectric filter capacitor, comprise capacitor body, pin and be coated on the embedding layer of capacitor body outside, described capacitor body is formed by polypropylene film that is coated with metal level and the superimposed successively coiling of metallized polyester film, and its design feature is a strata third film that superposes at the lateral surface of metallized polyester film; Described metal level is connected to form by aluminum metal layer and zinc metal level, and aluminum metal layer is an electrode surface, and the zinc metal level is a stiffened edge; Described embedding layer is the epoxy resin cure layer.

The purpose of this utility model can also be achieved through the following technical solutions, described laminated film dielectric filter capacitor, after its characteristics are polypropylene film and metallized polyester film and the poly-superimposed coiling of third film, spray respectively to establish by metal at an end face of end face of the metal level of polypropylene film and metallized polyester film and merge the gilding layer that forms, gilding layer welds with pin.

Advantage of the present utility model: the utility model side resistance is little, and the rete thickening has increased withstand voltagely, and lateral area increases simultaneously, and the gilding layer contact-making surface increases, and loss value is stable, and the electrical conduction current ability is strong; And be regardless of both positive and negative polarity, and the energy storage density height, conductive area is big, can bear bigger electric current; Isothermal curing epoxy resin carries out overall package, has both guaranteed the dielectric strength of capacitor, also guarantees the safe handling of capacitor under mal-condition simultaneously.Increase pole plate over against area, capacity increases, and content volume is more many than just having diminished, and the capacitor volume has just reduced accordingly, is fit to be installed in the multiple compact electric apparatus equipment.

Description of drawings:

Fig. 1 is a capacitor body coiling cross-sectional view of the present utility model;

Fig. 2 is the structural representation of the utility model capacitor.

Among the figure: polypropylene film 1, aluminum metal layer 11, zinc metal level 12, metallized polyester film 2, pin 3, gilding layer 4, embedding layer 5, capacitor body 6, poly-third film 7.

Embodiment:

Below in conjunction with accompanying drawing and example, structure of the present utility model and operation principle are elaborated:

As depicted in figs. 1 and 2, laminated film dielectric filter capacitor described in the utility model, comprise capacitor body 6, pin 3 and be coated on the embedding layer 5 of capacitor body 6 outsides, its design feature is that described capacitor body 6 is formed by polypropylene film 1 that is coated with metal level and the superimposed successively coiling of metallized polyester film 2, the compound no-induction of preferred employing is reeled and is formed, there is a strata third film 7 to be superimposed upon on the non-superposed surfaces of metallized polyester film 2, promptly corresponding with metallized polyester film 2 superposed surfaces lateral surface superimposed successively coiling again forms, rete thickens, increased withstand voltagely, simultaneously lateral area increases.Described metal level is connected to form by aluminum metal layer and zinc metal level, and aluminum metal layer 11 is an electrode surface, and zinc metal level 12 is a stiffened edge.Described embedding layer 5 is the epoxy resin cure layer.

Behind polypropylene film 1 and metallized polyester film 2, poly-third film, the 7 superimposed coilings, spray respectively to establish by some kinds of metals at an end face of end face of the metal level of polypropylene film 1 and metallized polyester film 2 and merge the gilding layer that forms, some kinds of metals can be the combinations of zinc, antimony, tin, four kinds of metals of copper.It is pin 3 that gilding layer 4 is convenient to capacitor core 6 welding extraction electrodes.Because electric capacity produces heat at high temperature, big current work state, the too high then conductance of temperature is to capacitor generation thermal breakdown phenomenon, so extraction electrode is designed to special version, with gilding layer 4 bigger contact area arranged, and firm welding, be convenient to heat to deriving.Draw after pin 3 welding finishes, capacitor body 6 is gone in the particular manufacturing craft, carry out overall package with isothermal curing epoxy resin, both guaranteed the dielectric strength of capacitor, the while also guarantees the safe handling of capacitor under mal-condition.

Claims

1. laminated film dielectric filter capacitor, comprise capacitor body (6), pin (3) and be coated on the outside embedding layer (5) of capacitor body (6), described capacitor body (6) is formed by polypropylene film that is coated with metal level (1) and the superimposed successively coiling of metallized polyester film (2), it is characterized in that: at the lateral surface of metallized polyester film (a 2) strata third film (7) that superposes; Described metal level is connected to form by aluminum metal layer and zinc metal level, and aluminum metal layer (11) is an electrode surface, and zinc metal level (12) is a stiffened edge; Described embedding layer (5) is the epoxy resin cure layer.

2. laminated film dielectric filter capacitor according to claim 1, it is characterized in that: polypropylene film (1) is with metallized polyester film (2) and after gathering the superimposed coiling of third film (7), spray respectively to establish at an end face of end face of the metal level of polypropylene film (1) and metallized polyester film (2) and merge the gilding layer (4) that forms, gilding layer (4) and pin welding by metal.