CN102522198B - Metallized membrane capacitor assembly - Google Patents
Metallized membrane capacitor assembly Download PDFInfo
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- CN102522198B CN102522198B CN 201110405484 CN201110405484A CN102522198B CN 102522198 B CN102522198 B CN 102522198B CN 201110405484 CN201110405484 CN 201110405484 CN 201110405484 A CN201110405484 A CN 201110405484A CN 102522198 B CN102522198 B CN 102522198B
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- extraction electrode
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- copper bar
- electric capacity
- pressure extraction
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Abstract
The invention discloses a metallized membrane capacitor assembly, which belongs to a capacitor used in the pulse power field and solves the problem that the traditional high-voltage metallized membrane capacitor is readily explosive when used in atmospheric or low pressure environment. The metallized membrane capacitor assembly comprises capacitor cores, DMD (Digital Micromirror Device) insulating papers, a high-voltage extraction electrode and a low-voltage extraction electrode, wherein M capacitor cores achieve the purpose of connecting capacitors in parallel to form capacitor stacks; N capacitor stacks achieve the purpose of connecting capacitors in series to form capacitor assemblies; the DMD insulating papers are arranged among the capacitor stacks; and the capacitor assemblies, the DMD insulation papers, the high-voltage extraction electrode and the low-voltage extraction electrode are integrally encapsulated by polyurethane pouring sealant to form the metallized membrane capacitor assembly. The metallized membrane capacitor assembly has higher energy storage density and electric strength, good insulation reliability in atmospheric or low pressure environment, and better mechanical performance and longer service life under a heavy-current discharging condition.
Description
Technical field
The invention belongs to the capacitor that use in the pulse power field, be specifically related to a kind of metallization film capacitor assembly, be applied in atmospheric pressure or hypobaric.
Background technology
Metallization film capacitor has self-healing performance owing to adopt metallization process, can be operated under the critical disruptive field intensity, improves the energy storage density of deielectric-coating greatly, reduces the volume of energy-storage travelling wave tube.Therefore, the elementary energy storage and the intermediate energy storage of metal current membrane capacitance Chang Zuowei impulse power electrical source.
It is worthy of note that existing high-pressure metal membrane capacitance for reaching than high energy storage density, needs the capacitor complete machine to have higher encapsulation coefficient, i.e. volume utilization, this just needs to consider the built-in electrical insulation structural design.The pulse capacitor of using under the general atmosphere condition adopts the encapsulation of metal or insulation crust more, inner with air or other gas as dielectric, be called dry construction; The inner impregnating agent that injects is called the impregnated structure as dielectric.(air pressure is lower than 10 towards hypobaric when pulse capacitor
-1When Pa) using, produce breach in case the potential safety hazard that dry construction exists is sealing, portion forms local depression very easily within it, causes the inner flashover discharge that takes place under low voltage, causes the capacitor blast.The danger that impregnating agent leaks even explodes may take place in impregnated structure equally.
The DMD insulating paper full name that relates among the present invention is polyester film, nonwoven polyester fabric composite-insulating paper.
Summary of the invention
The invention provides a kind of metallization film capacitor assembly, solve existing high-pressure metal membrane capacitance and under atmospheric pressure or hypobaric, use the problem of blast easily.
A kind of metallization film capacitor assembly of the present invention comprises capacitor core, DMD insulating paper, high pressure extraction electrode and low pressure extraction electrode, it is characterized in that:
Described capacitor core is wound on the mandrel by the double-layer metallization polypropylene film is stacked together, reel and insert polypropylene light film between the double-layer metallization polypropylene film end of back, polypropylene light film is wrapped in outside the metallized polypropylene film, 10～30 circles of reeling again, the equal sprayed metal layer of the back both ends of the surface of reeling;
The structure of described metallized polypropylene film is: an end of polypropylene film upper surface leaves insulating flange, other regional metalling electrode evaporation of upper surface; When the double-layer metallization polypropylene film was stacked, the face of metalling electrode evaporation was towards identical, and insulating flange is separately on left side and right side;
M capacitor core both ends of the surface are welded copper bar respectively, realize the electric capacity parallel connection, form the electric capacity storehouse, M 〉=2;
The front end face of N electric capacity storehouse or rear end face welding copper bar are realized the series connection of electric capacity storehouse, form capacitance component, N 〉=2; Have 2～10 layers of DMD insulating paper between each electric capacity storehouse, carry out electric insulation;
In the capacitance component, first electric capacity storehouse does not realize that by the welding copper bar end face of connected in electrical series connects high pressure extraction electrode or low pressure extraction electrode by confluence copper bar, and N electric capacity storehouse do not realize that by the welding copper bar end face of connected in electrical series connects low pressure extraction electrode or high pressure extraction electrode by confluence copper bar;
Adopt polyurethane pouring sealant to the whole embedding of described capacitance component, DMD insulating paper, confluence copper bar, high pressure extraction electrode and low pressure extraction electrode, and exposed portions serve high pressure extraction electrode and low pressure extraction electrode, constitute described metallization film capacitor assembly.
The present invention can guarantee the capacitor core arrangement closely, and complete machine has higher encapsulation coefficient and higher energy storage density; Take two-layer above DMD insulating paper to carry out electrical isolation between each electric capacity storehouse, can reach higher electrical strength; Polyurethane embedding with high tenacity and high rigidity can prevent that (air pressure is lower than 10 to capacitor at hypobaric
-1The local depression of inner formation when Pa) using, generation guarantees to have good insulation performance reliability and higher operating voltage under atmospheric environment or hypobaric by the blast that the internal flashover discharge causes; In addition, polyurethane has certain sound absorption function, self-healing noise in the time of reducing capacitor work; Simultaneously, polyurethane embedding structure can avoid capacitor service time long afterwards moisture enter inside; And high-low pressure electrode and internal connection line can be fixed after the urethane cures, lead is significantly swung during restriction large-current electric dynamic action, guarantees to have under the heavy-current discharge condition mechanical performance and useful life preferably.
Description of drawings
Fig. 1 (A) is the capacitor core structural representation;
Fig. 1 (B) is the metallized polypropylene film schematic diagram;
Fig. 2 (A) is a basic electric capacity storehouse of the present invention;
Fig. 2 (B) is a basic electric capacity storehouse end view of the present invention;
Fig. 3 (A) is composed in series the end view of capacitance component for two electric capacity storehouses among Fig. 2;
Fig. 3 (B) is composed in series the vertical view of capacitance component for two electric capacity storehouses among Fig. 2;
Fig. 4 (A) is a capacitance component embedding structure side view among Fig. 3;
Fig. 4 (B) is a capacitance component embedding structure vertical view among Fig. 3;
Fig. 5 (A) is the end view that 3 electric capacity storehouses are composed in series capacitance component;
Fig. 5 (B) is the vertical view that 3 electric capacity storehouses are composed in series capacitance component.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Shown in Fig. 1 (A), Fig. 1 (B), Fig. 2 (A), Fig. 2 (B), Fig. 3 (A), Fig. 3 (B), Fig. 4 (A), Fig. 4 (B), the embodiment of the invention comprises capacitor core 5, copper bar 6, DMD insulating paper 8, confluence copper bar 9, high pressure extraction electrode 10a, low pressure extraction electrode 10b and polyurethane pouring sealant 11.
Shown in Fig. 1 (A), Fig. 1 (B), capacitor core 5 is by double-layer metallization polypropylene film 2 stacked together being wound on the mandrel 1, reel and insert polypropylene light film 3 between double-layer metallization polypropylene film 2 ends of back, polypropylene light film is wrapped in outside the metallized polypropylene film 2,20 circles of reeling again, the equal sprayed metal layer 4 of the back both ends of the surface of reeling;
The structure of described metallized polypropylene film 2 is: an end of polypropylene film 2a upper surface leaves insulating flange 2b, other regional metalling electrode evaporation 2c of upper surface; When double-layer metallization polypropylene film 2 was stacked, the face of metalling electrode evaporation 2c was towards identical, and insulating flange 2b is separately on left side and right side;
The capacitance of each capacitor core 5 is 50 μ F, and rated voltage is 4kV.
Shown in Fig. 2 (A), Fig. 2 (B), 18 capacitor cores 5 are arranged in 3 * 6 arrays, and both ends of the surface are welded copper bar 6 respectively, realize the electric capacity parallel connection, form electric capacity storehouse 7.The capacitance of each electric capacity storehouse 7 is 900 μ F, and rated voltage is 4kV.
Shown in Fig. 3 (A), Fig. 3 (B), the front end face of two electric capacity storehouses 7 welding copper bar 6 is realized the series connection of electric capacity storehouse, forms capacitance component.Insert 2 layers of DMD insulating paper 8 between two electric capacity storehouses 7, the voltage that every layer of DMD insulating paper can bear is 8kV; The rear end face of left side electric capacity storehouse 7 connects high pressure extraction electrode 10a by confluence copper bar 9, and the rear end face of right side electric capacity storehouse 7 connects low pressure extraction electrode 10b by confluence copper bar 9.
Shown in Fig. 4 (A), Fig. 4 (B), adopt the whole embedding of 11 pairs of described capacitance components of polyurethane pouring sealant, DMD insulating paper 8, confluence copper bar 9, high pressure extraction electrode 10a and low pressure extraction electrode 10b, and exposed portions serve high pressure extraction electrode 10a and low pressure extraction electrode 10b, be used for being connected, constitute the metallization film capacitor assembly with external electrical;
During embedding, capacitance component places inwall to scribble the container of release agent.Capacitance component and container place 80 ℃ environment to heat two hours before the embedding, remove surface moisture.Then polyurethane pouring sealant 11 is imported in the container, treat to take out capacitance component from container after polyurethane pouring sealant 11 solidifies through 24h.Whole metallization film capacitor electrical component capacity is 450 μ F, and rated voltage is 8kV.
Shown in Fig. 5 (A), Fig. 5 (B), 3 electric capacity storehouses 7 realize that the electric capacity storehouse is composed in series capacitance component; First, second electric capacity storehouse 7 front end faces welding copper bar 6 is realized being electrically connected; Second, third electric capacity storehouse 7 rear end faces welding copper bar 6 is realized being electrically connected; Between first and second electric capacity storehouses 7, insert 2 layers of DMD insulating paper 8 respectively between second and the 3rd electric capacity storehouse 7; The rear end face of first electric capacity storehouse 7 connects high pressure extraction electrode 10a by confluence copper bar 9, and the front end face of the 3rd electric capacity storehouse 7 connects low pressure extraction electrode 10b by confluence copper bar 9.
The polyurethane embedding structure of capacitance component shown in Fig. 5 (A), Fig. 5 (B) is identical with Fig. 4 (A), Fig. 4 (B).Whole capacitor electrical component capacity is 300 μ F, and rated voltage is 12kV.
Claims (1)
1. a metallization film capacitor assembly comprises capacitor core, DMD insulating paper, high pressure extraction electrode and low pressure extraction electrode, it is characterized in that:
Described capacitor core is wound on the mandrel (1) by double-layer metallization polypropylene film (2) is stacked together, reel and insert polypropylene light film (3) between double-layer metallization polypropylene film (2) end of back, polypropylene light film is wrapped in outside the metallized polypropylene film (2), 10～30 circles of reeling again, the back equal sprayed metal layer of both ends of the surface (4) of reeling;
The structure of described metallized polypropylene film (2) is: an end of polypropylene film (2a) upper surface leaves insulating flange (2b), other regional metalling electrode evaporation (2c) of upper surface; When double-layer metallization polypropylene film (2) was stacked, the face of metalling electrode evaporation (2c) was towards identical, and insulating flange (2b) is separately on left side and right side;
M capacitor core (5) both ends of the surface are welded copper bar (6) respectively, realize the electric capacity parallel connection, form electric capacity storehouse (7), M 〉=2;
The front end face of N electric capacity storehouse (7) or rear end face welding copper bar (6) are realized the series connection of electric capacity storehouse, form capacitance component, N 〉=2; Have 2～10 layers of DMD insulating paper (8) between each electric capacity storehouse (7), carry out electric insulation;
In the capacitance component, first electric capacity storehouse does not realize that by welding copper bar (6) end face of connected in electrical series connects high pressure extraction electrode (10a) by confluence copper bar (9), and N electric capacity storehouse do not realize that by welding copper bar (6) end face of connected in electrical series connects low pressure extraction electrode (10b) by confluence copper bar (9); Perhaps first electric capacity storehouse does not realize that by welding copper bar (6) end face of connected in electrical series connects low pressure extraction electrode (10b) by confluence copper bar (9), and N electric capacity storehouse do not realize that by welding copper bar (6) end face of connected in electrical series connects high pressure extraction electrode (10a) by confluence copper bar (9);
Adopt polyurethane pouring sealant (11) to the whole embedding of described capacitance component, DMD insulating paper, confluence copper bar, high pressure extraction electrode and low pressure extraction electrode, and exposed portions serve high pressure extraction electrode and low pressure extraction electrode, constitute described metallization film capacitor assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110405484 CN102522198B (en) | 2011-12-08 | 2011-12-08 | Metallized membrane capacitor assembly |
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| CN 201110405484 CN102522198B (en) | 2011-12-08 | 2011-12-08 | Metallized membrane capacitor assembly |
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| CN102522198B true CN102522198B (en) | 2013-07-24 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103489636A (en) * | 2013-09-06 | 2014-01-01 | 安徽赛福电子有限公司 | Dry-type direct-current filter capacitor suitable for being used in wet tropical zone |
| CN104299775A (en) * | 2014-10-18 | 2015-01-21 | 安徽精新能源科技股份有限公司 | Large-scale ultra-silence capacitor and manufacturing method thereof |
| CN104953553B (en) * | 2015-06-23 | 2018-01-26 | 华中科技大学 | A kind of dry type metallization film capacitor air-sensitive protection device and method |
| CN107093517B (en) * | 2016-12-22 | 2020-12-25 | 中国工程物理研究院应用电子学研究所 | Small hundred kilovolt high-voltage pulse capacitor with repetition frequency |
| EP3396690B1 (en) | 2017-04-26 | 2020-04-01 | ABB Power Grids Switzerland AG | Multielectrode power capacitor with reduce noise vibration |
| CN108320908B (en) * | 2017-12-27 | 2019-12-17 | 上海广吉电气有限公司 | High-voltage-resistant impact-resistant high-frequency high-voltage capacitor |
| CN109683072A (en) * | 2019-01-11 | 2019-04-26 | 华中科技大学 | A kind of metalized film self-healing device under the composite voltage for alternating current-direct current |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0669069A (en) * | 1992-08-19 | 1994-03-11 | Nichicon Corp | Metallized film capacitor |
| JP3123491B2 (en) * | 1997-12-04 | 2001-01-09 | 松下電器産業株式会社 | Capacitor |
| CN101604575A (en) * | 2009-04-30 | 2009-12-16 | 杨文荣 | A kind of manufacture craft of metalizing polypropylene thin film capacitor |
| CN202025649U (en) * | 2011-04-06 | 2011-11-02 | 铜陵市文峰电子有限责任公司 | Novel environment-friendly and efficient high-pressure traction energy-storage capacitor |
| CN202067672U (en) * | 2011-05-19 | 2011-12-07 | 来恩伟业(鹤壁)电子科技有限责任公司 | DC pulse capacitor |
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