CN205723160U - A kind of converter metallic film filter capacitor - Google Patents
A kind of converter metallic film filter capacitor Download PDFInfo
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- CN205723160U CN205723160U CN201620369138.3U CN201620369138U CN205723160U CN 205723160 U CN205723160 U CN 205723160U CN 201620369138 U CN201620369138 U CN 201620369138U CN 205723160 U CN205723160 U CN 205723160U
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Abstract
This utility model provides a kind of converter metallic film filter capacitor, and it includes core group, and described core group is formed by least one set thin layer winding, and described thin layer includes two-sided metallization polypropylene film or two-sided metallization mylar and dielectric layer；Wherein said two-sided metallization polypropylene film or the upper and lower surface that two-sided metallization mylar is polypropylene film or mylar are provided with metal level, and wherein one layer is aluminum metal layer, and other one layer is zinc metal level；Encapsulated layer, described encapsulated layer is wrapped in all sides of described core group；And pin, described pin is connected with described core group and stretches out described encapsulated layer.The breakdown field strength of converter metallic film filter capacitor of the present utility model is high, and service life is long, and self-healing performance is good.
Description
Technical field
This utility model relates to filter field, particularly relates to a kind of converter metallic film filter capacitor.
Background technology
Capacitor, being generally called for short its ability accommodating electric charge is electric capacity；Capacitor, as the term suggests, it is " container of dress electricity ", is a kind of device accommodating electric charge, capacitor is one of a large amount of electronic components used in electronic equipment, be widely used in circuit every straight-through friendship, coupling, bypass, filter, resonant tank, the aspects such as energy is changed, control.
Its Main Function of converter filter capacitor is filtering.(i.e. assuming that electric capacity is purely capacitive) in theory to say, electric capacity is the biggest, and impedance is the least, and the frequency passed through is the highest.But the electric capacity actually exceeding 1 μ F is mostly electrochemical capacitor, there is the biggest inductance composition, so impedance can increase on the contrary after frequency height.Seeing there has been one small capacitances of a capacitance bigger electrochemical capacitor parallel connection sometimes, at this moment bulky capacitor leads to low frequency, and small capacitances leads to high frequency.It is low that high resistant is led in the effect of electric capacity exactly, logical high frequency resistance low frequency.The biggest low frequency of electric capacity is less susceptible to pass through.It is used in particular in filtering, bulky capacitor (1000 μ F) filter low frequency, small capacitances (20pF) filter high frequency.Owing to the both end voltage of electric capacity will not be suddenlyd change, it follows that signal frequency is the highest, decay the biggest, can the most figuratively electric capacity picture pool, will not because of several drip add or evaporation and cause the change of the water yield.It is converted into the change of electric current the variation of voltage, and frequency is the highest, and peak point current is the biggest, thus has buffered voltage.Filtering is charged exactly, the process of electric discharge.
Commonly use in converter at present is aluminium electrolutic capacitor, and during this electrolysis condenser uses, maximum problem is life problems, is especially apparent the most under the high temperature conditions.The life-span of electrolysis condenser directly affects the life-span of this converter.Therefore it provides the capacitor of length in a kind of service life is problem demanding prompt solution.
Utility model content
Based on above-mentioned deficiency, this utility model provides the converter metallic film filter capacitor of length in a kind of service life.
This utility model adopts the following technical scheme that
A kind of converter metallic film filter capacitor, it includes
Core group, described core group is formed by least one set thin layer winding, and described thin layer includes two-sided metallization polypropylene film or two-sided metallization mylar and dielectric layer；Wherein said two-sided metallization polypropylene film or the upper and lower surface that two-sided metallization mylar is polypropylene film or mylar are provided with metal level, and wherein one layer is aluminum metal layer, and other one layer is zinc metal level；
Encapsulated layer, described encapsulated layer is wrapped in all sides of described core group；And
Pin, described pin is connected with described core group and stretches out described encapsulated layer.
Wherein, the metal level of described dielectric layer both sides is aluminum metal layer or zinc metal level.
Wherein, the thickness of described polypropylene film or described mylar is 8 μm.
Wherein, the thickness of described dielectric layer is 8 μm.
Wherein, the both sides up and down of described two-sided metallization polypropylene film or two-sided metallization mylar are provided with stays limit, and the limit of staying of upper and lower both sides lays respectively at described polypropylene film or the two ends of described mylar.
Wherein, the length staying limit of the wherein side of described two-sided metallization polypropylene film or two-sided metallization mylar stays the length on limit more than opposite side.
Wherein, the length length staying limit less than end staying limit of initiating terminal when described two-sided metallization polypropylene film or two-sided metallization mylar winding.
Wherein, the winding end of described thin layer is provided with gilding layer.
Wherein, the length during described pin is positioned at described encapsulated layer is not more than the 20% of pin entire length.
Wherein, the cross sectional shape of described converter metallic film filter capacitor is circular, and height and the diameter ratio of described converter metallic film filter capacitor are 1 ~ 1.5:1.
The beneficial effects of the utility model are: converter metallic film filter capacitor of the present utility model have employed two-sided metallization polypropylene film or two-sided metallization mylar, it is high that it has breakdown field strength, dielectric loss is low, generate heat low, operation temperature rise is low, life of product is long, and bit performance is good and can the feature of spontaneous recovery；And the metal level of the both sides of this two-sided metallization polypropylene film or two-sided metallization mylar is different, alminium electrolytic condenser capacity is big, but electric leakage is big, poor stability, the problem that can make up the poor stability of aluminum metal layer electric capacity after adding zinc metal level.The breakdown field strength of converter metallic film filter capacitor the most of the present utility model is high, and service life is long, and self-healing performance is good.
Accompanying drawing explanation
Fig. 1 is the overall schematic of an embodiment of the converter metallic film filter capacitor in this utility model；
Fig. 2 is the overall schematic of the thin layer in Fig. 1；
Fig. 3 is the overall schematic of the two-sided metallization polypropylene film in Fig. 2.
Detailed description of the invention
This utility model is described in detail below in conjunction with embodiment and accompanying drawing.It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
See Fig. 1, a kind of converter metallic film filter capacitor, it includes core group 100, encapsulated layer 200 and pin 300, and wherein encapsulated layer 200 is coated on all sides of core group 100, that is core group 100 entirety is wrapped in encapsulated layer 200, and pin 300 is connected with core group and stretches out encapsulated layer 200.
Please with further reference to Fig. 2, the core group 200 in the present embodiment is formed by least one set thin layer 110 winding, and thin layer can be many groups, and after the stacking of many cluster films is closed, winding forms core group.Thin layer 110 includes two-sided metallization polypropylene film 111 or two-sided metallization mylar and dielectric layer 112.When thin layer is for organizing more, two-sided metallization polypropylene film can be, it is also possible to be used in conjunction with for two-sided metallization mylar and two-sided metallization polypropylene film, but wherein must have two-sided metallization polypropylene film.More excellent, the thickness of dielectric layer should be less than two-sided metallization polypropylene film 111 or the thickness of two-sided metallization mylar.So can reduce the distance between pole plate layer as far as possible, thus increase electric capacity.
Referring to Fig. 3, described two-sided metallization polypropylene film 111 or the upper and lower surface that two-sided metallization mylar is polypropylene film or mylar and be provided with metal level, wherein one layer 1111 is aluminum metal layer, and other one layer 1112 is zinc metal level.The metal level of the both sides of this two-sided metallization polypropylene film or two-sided metallization mylar is different, and alminium electrolytic condenser capacity is big, but electric leakage is big, poor stability, the problem that can make up the poor stability of aluminum metal layer electric capacity after adding zinc metal level, so that its heat resistance is good, service life is long.
Converter metallic film filter capacitor of the present utility model have employed the two-sided metallization thin film that both sides metal level is different, it is made not only to have the feature of metallized film itself, and further enhancing capacitance, there is higher stability and longer service life.
Further, when thin layer for organizing more, the metal level of described dielectric layer both sides is aluminum metal layer or zinc metal level.That is the metal level of dielectric layer both sides is identical.So arrange and ensure that higher breakdown field strength.
It is also preferred that the left as a kind of embodiment, the thickness of described polypropylene film or described mylar is 8 μm.Owing to this utility model have employed the two-sided metallization thin film that metal level is different, therefore can reduce the thickness of polypropylene film or mylar accordingly, it is possible to reduce the distance between metal level, increase capacitance, lower production cost simultaneously.
Same, the thickness of described dielectric layer is 8 μm.
Preferably, as a kind of embodiment, seeing Fig. 3, the both sides up and down of described two-sided metallization polypropylene film 111 or two-sided metallization mylar are provided with stays limit, and the limit of staying of upper and lower both sides lays respectively at described polypropylene film or the two ends of described mylar.Up and down both sides stay limit lay respectively at described polypropylene film or described mylar two ends can instant rolled around.
It is also preferred that the left as a kind of embodiment, the length staying limit of the wherein side of described two-sided metallization polypropylene film or two-sided metallization mylar stays the length on limit more than opposite side.
More excellent, the length length staying limit less than end staying limit of initiating terminal when described two-sided metallization polypropylene film or two-sided metallization mylar winding.Convenient winding and follow-up metal spraying is so set.
It is also preferred that the left as a kind of embodiment, the winding end of described thin layer is provided with gilding layer.The raw material of gilding layer is formed by zinc, copper, nickel fusion, can form the solderable metal layers of densification, weld with pin and ensure that firm welding.
Further, seeing Fig. 1, the length that described pin is positioned in described encapsulated layer is not more than the 20% of pin entire length.So arrange and ensure that the heat conduction of pin is rapid, thus improve the heat-sinking capability of whole capacitor, extend its service life.
It addition, the cross sectional shape of described converter metallic film filter capacitor is circular, height and the diameter ratio of described converter metallic film filter capacitor are 1 ~ 1.5:1.The height of described converter metallic film filter capacitor and diameter ratio i.e. the height of encapsulated layer and diameter ratio, it has been investigated that, when the height of encapsulated layer and diameter ratio are 1:1 (now height and the diameter ratio of core group is preferably 1.2:1), the heat radiation both axially and radially of whole capacitor reaches balance, internal temperature field distribution is uniform, and radiating effect is best.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (10)
1. a converter metallic film filter capacitor, it is characterised in that include
Core group, described core group is formed by least one set thin layer winding, and described thin layer includes two-sided metallization polypropylene film or two-sided metallization mylar and dielectric layer；Wherein said two-sided metallization polypropylene film or the upper and lower surface that two-sided metallization mylar is polypropylene film or mylar are provided with metal level, and wherein one layer is aluminum metal layer, and other one layer is zinc metal level；
Encapsulated layer, described encapsulated layer is wrapped in all sides of described core group；And
Pin, described pin is connected with described core group and stretches out described encapsulated layer.
Converter metallic film filter capacitor the most according to claim 1, it is characterised in that the metal level of described dielectric layer both sides is aluminum metal layer or zinc metal level.
Converter metallic film filter capacitor the most according to claim 2, it is characterised in that the thickness of described polypropylene film or described mylar is 8 μm.
Converter metallic film filter capacitor the most according to claim 2, it is characterised in that the thickness of described dielectric layer is 8 μm.
Converter metallic film filter capacitor the most according to claim 2, it is characterized in that, the both sides up and down of described two-sided metallization polypropylene film or two-sided metallization mylar are provided with stays limit, and the limit of staying of upper and lower both sides lays respectively at described polypropylene film or the two ends of described mylar.
Converter metallic film filter capacitor the most according to claim 5, it is characterised in that the length staying limit of the wherein side of described two-sided metallization polypropylene film or two-sided metallization mylar stays the length on limit more than opposite side.
Converter metallic film filter capacitor the most according to claim 6, it is characterised in that the length length staying limit less than end staying limit of initiating terminal when described two-sided metallization polypropylene film or two-sided metallization mylar winding.
8. according to the converter metallic film filter capacitor described in claim 1 to 7 any one, it is characterised in that be provided with gilding layer on the winding end of described thin layer.
9. according to the converter metallic film filter capacitor described in claim 1 to 7 any one, it is characterised in that the length that described pin is positioned in described encapsulated layer is not more than the 20% of pin entire length.
10. according to the converter metallic film filter capacitor described in claim 1 to 7 any one, it is characterized in that, the cross sectional shape of described converter metallic film filter capacitor is circular, and height and the diameter ratio of described converter metallic film filter capacitor are 1 ~ 1.5:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620369138.3U CN205723160U (en) | 2016-04-28 | 2016-04-28 | A kind of converter metallic film filter capacitor |
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| CN201620369138.3U CN205723160U (en) | 2016-04-28 | 2016-04-28 | A kind of converter metallic film filter capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826075A (en) * | 2016-04-28 | 2016-08-03 | 长兴蓝天电子有限公司 | Metal thin film filtering capacitor for frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826075A (en) * | 2016-04-28 | 2016-08-03 | 长兴蓝天电子有限公司 | Metal thin film filtering capacitor for frequency converter |
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