CN2711872Y - Bypass capacitor - Google Patents

Abstract

A bypass capacitor of the utility model comprises an X2 capacitor and two Y2 capacitors which are positioned in the case and sealed by the sealing material. The X2 capacitor is windinged inductionless by the dielectric material which is made of metallization polypropylene of ziram and aluminum composite film whose thickness is 7 mu m and edge is thickening, and the Y2 capacitor is windinged internal series by the dielectric material which is made of aluminum metallization polypropylene film whose thickness is 10 mu m. Adopting the metallization polypropylene material, the triangle connection bypass capacitor has the advantages of good self-healing performance, good AC performance, stable performance, small tangent of the loss angle, and that the bypass capacitor can bear high-density pulse voltage. Adopting the metallization polypropylene film as the dielectric material, different types capacitors (X2, Y2) adopt different vapor deposition types of metallization film, the three capacitor cores are integrated into net connection, a fire retardant PBT engineering plastic case is arranged, so the triangle bypass capacitor has also the advantages of compact conformation, novelty, small dimension and that the technique index of high performance is achieved.

Description

By-pass capacitor

Technical field

The utility model relates to a kind of capacitor, particularly a kind of by-pass capacitor.

Background technology

It is to be used for Electrical and Electronic equipment and to jump to power line that inhibition power supply electromagnetic interference triangle connection by-pass capacitor is mainly used, its function is to reduce the electromagnetic interference that electric/electronic device or other interference sources produced, and unwanted transient surge voltage in the power supply is reduced to receivable level.Can reduce electronic electric equipment owing to outside line is subjected to the electromagnetic interference that thunder and lightning or switch neighbouring device or equipment of itself produce.

It is that an X2 capacitor adopts triangles to be connected with two Y2 capacitors to combine that triangle connects by-pass capacitor, and this product is by a CBB62 type X2 class capacitor and two triangle capacitance networks that CBB66 type Y2 class capacitor connects to form.X class electric capacity is useful in the occasion that can not cause shock hazard when capacitor lost efficacy, and is connected across between the lead with short circuit balance disturbance current.Y class electric capacity is useful in the occasion that can cause shock hazard when capacitor lost efficacy, and is connected across between lead and casing or the ground connection, with the unbalanced disturbance current of short circuit.Three kinds of versions are arranged at present basically:

First kind: adopting high-density capacitor paper is that medium, aluminium foil are that electrode, dipping solid kind impregnant, electrode foil are made lead-out wire, and thoughts formula structure is once reeled and formed, and X2 and three fuses of Y2 adopt mutually and intert, and extraction electrode is public.Its characteristics: volume is little, compact conformation, cost are low, and three capacitors work alone, but production equipment is had relatively high expectations, loss value is big, technology controlling and process is difficult.

Second kind: the X2 capacitor adopts the metallized organic film no-induction to reel, and the Y2 capacitor adopts the two sides by the interchange ceramic disc capacitor device of silver, combines the by-pass capacitor that triangle connects.Its characteristics: volume is big, cost is higher, and different dielectric material consistency of performance is poor, but production technology is convenient, and domestic this method that generally adopts is more at present.

The third: it is medium that X2 and Y2 all adopt organic film material, and inside is formed by connecting, and forms the by-pass capacitor that triangle connects.Its characteristics: volume is little, cost is low, and the dielectric material consistency of performance that the loss angle value is little, identical is good, mixes integratedly easily, and production technology is simple and convenient, and present this method of domestic employing is less.

Summary of the invention

The utility model provides a kind of by-pass capacitor, adopts the third frame mode to make.

Be achieved in that for reaching above-mentioned purpose the utility model

A kind of by-pass capacitor, form by placing an X2 electric capacity and two Y2 electric capacity in the shell, and by the potting compound embedding, described X2 capacitor is that 7 μ m metallized polypropylene edges thickening zinc-aluminium laminated film is that dielectric material no-induction coiling forms with thickness, and described Y2 capacitor adopts 10 μ m aluminum metallization polypropylene films to reel for the dielectric material inner series and forms.

Preferable, the material of described shell is black flame-retardant PBT engineering plastics.

Preferable, described potting compound is a black flame-retardant epoxy resin.

The beneficial effects of the utility model are: this triangle connects by-pass capacitor owing to use the metallized polypropylene material, not only has good self-healing performance, and it is good to exchange performance, can bear highdensity pulse voltage, and loss tangent is little, stable performance.Design adopts metallized polypropylene film to do medium, dissimilar (X2, Y2) capacitors adopts different metallized film evaporation modes, three integrated combinational networks of capacitor body connect, be equipped with PBT engineering plastics shell, make triangle by-pass capacitor structure compactness, have a fashion style, less overall dimension reaches high performance technical indicator.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Label declaration

1, X2 type electric capacity 4, potting compound

2, Y2 type electric capacity 5, shell

3, lead

Embodiment

Further specify the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of by-pass capacitor, form by placing an X2 capacitor 1 and two Y2 capacitors 2 in the shell 5, and by potting compound 4 embeddings, described X2 capacitor 1 is that 7 μ m metallized polypropylene edges thickening zinc-aluminium laminated film is that dielectric material no-induction coiling forms with thickness, and described Y2 electric capacity 2 devices adopt 10 μ m aluminum metallization polypropylene films to reel for the dielectric material inner series and form.

Consider that it is single fuse that triangle connects by-pass capacitor, the plastic casing space availability ratio requires than higher, by further adjustment fuse coiling parameter, X2 capacitor 2 fuse sizes have been dwindled, realize X2 capacitor 1 and the 2 combination core group overall dimension better matching combinations of Y2 capacitor, to reach less overall dimension.According to product requirement on electric performance and technological feasibility, it is black flame-retardant PBT engineering plastics that this example is chosen shell 5 materials simultaneously; Potting compound 4 adopts black flame-retardant epoxy resin.

Claims (3)

1, a kind of by-pass capacitor, form by placing an X2 capacitor and two Y2 capacitors in the shell, and by the potting compound embedding, it is characterized in that: described X2 capacitor is that 7 μ m metallized polypropylene edges thickening zinc-aluminium laminated film is that dielectric material no-induction coiling forms with thickness, and described Y2 capacitor adopts 10 μ m aluminum metallization polypropylene films to reel for the dielectric material inner series and forms.

2, by-pass capacitor according to claim 1 is characterized in that: the material of described shell is black flame-retardant PBT engineering plastics.

3, by-pass capacitor according to claim 1 and 2 is characterized in that: described potting compound is a black flame-retardant epoxy resin.

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