CN204668158U - A kind of Novel power capacitor - Google Patents
A kind of Novel power capacitor Download PDFInfo
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- CN204668158U CN204668158U CN201520417912.9U CN201520417912U CN204668158U CN 204668158 U CN204668158 U CN 204668158U CN 201520417912 U CN201520417912 U CN 201520417912U CN 204668158 U CN204668158 U CN 204668158U
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Abstract
The utility model relates to a kind of Novel power capacitor, belong to capacitor technology field, comprise the first housing, cover plate, the first core and the second core, in the middle of first enclosure interior, the second housing is set, be provided with gap between second housing and the first housing, the first housing is fixedly connected with cover plate with the second housing; Be connected in parallel between first core and the second core; Be provided with circular first groove and circular second groove in second housing, the first core is arranged on the first groove centre position, and the second core is arranged on the second groove centre position; Be provided with through hole between first groove and the second groove, through hole is communicated with the first groove and the second groove.Described Novel power capacitor, the content of epoxy resin of encapsulation reduces, and cost reduces.Capacitor core adopts two core parallel connections, and the total contact area between epoxy resin and core increases, and the radiating efficiency of capacitor uprises; In core, the probability of hot melt phenomenon reduces, and the security performance of capacitor strengthens.
Description
Technical field
The utility model relates to a kind of Novel power capacitor, belongs to capacitor technology field.
Background technology
The capacitor used in household electrical appliance and light fixture, comprise aluminium shell and be placed in the capacity cell in shell, capacity cell comprises core, capacitor terminal and two electrode end surfaces, the circular in cross-section of capacitor terminal, and two electrode end surfaces connect respective extraction electric wire and are connected with capacitor terminal; Encapsulated epoxy resin between capacitor case and capacity cell, epoxy resin wraps up capacity cell completely, and epoxy resin mainly plays insulation, fixation.Mainly there is following defect in existing capacitor: content of epoxy resin is higher, and epoxy resin price is very high, and the heat conductivility of epoxy resin is poorer than conduction oil; In high power capacitor, adopt the capacitor radiating effect of epoxy sealing poor, capacitor is blasted owing to dispelling the heat not in time, on fire, electrical equipment is caused damage.Density due to core is less than the density of epoxy resin, and in injection ring epoxy resins process, core can float, and not only affects follow-up installation, and the position of core in capacitor case constantly changes, and is unfavorable for that epoxy resin wraps up core completely.
In the capacitor that metallized film is made, the metal tegillum electrode evaporation that the energy produced during metallized film success self-healing makes one deck near breakdown point very thin, forms an irregular annular insulating regions and is kept apart by breakdown point thus the electrical property of whole capacitor is recovered substantially around breakdown point.The successful self-healing of breakdown point depends on the energy of release when puncturing, and this energy is mainly subject to the impact of the factors such as the static pressure of the thickness of core, the composition of dielectric material and breakdown point.Metallized film under many circumstances often can not successful self-healing, often the multilayer dielectricity with self-healing point adjacent is burnt in self-healing procedure, and continuity self-healing occurs and punctures, self-healing sound is continuous.Under the high temperature action continuously puncturing produced electric arc, the organic dielectric thin film of local softens, and produce hot melt phenomenon, multilayer dielectricity is bonded together, and supervenes a large amount of gas, cause capacitor short-circuit to lose efficacy, severe patient can be on fire from explosion.
Capacitor is as the main prototype part of the occasion such as reactive power compensation, harmonic in electric power system, safe, stable working in all kinds of electric power system is most important to whole electrical power trans mission/distribution system, the height of the dosing technology wherein in capacitor, the key of capacitor insulation level, the performance such as heat-resisting especially, good dosing technology, the performance of capacitor can be made to be greatly improved, capacitor can be made in various harsh system environments to have excellent performance.
Utility model content
The deficiency that the utility model exists for prior art, provides a kind of Novel power capacitor, and concrete technical scheme is as follows:
A kind of Novel power capacitor, comprises the first housing, cover plate, the first core and the second core, and arrange the second housing in the middle of the first enclosure interior, be provided with gap between the second housing and the first housing, the first housing is fixedly connected with cover plate with the second housing; Be connected in parallel between first core and the second core; Be provided with circular first groove and circular second groove in second housing, the first core is arranged on the first groove centre position, and the second core is arranged on the second groove centre position; Be provided with through hole between first groove and the second groove, through hole is communicated with the first groove and the second groove.
As the improvement of technique scheme, be provided with flexible fastening cover between described first core and the second core, the left end of fixed cover is fixedly connected with the first core, and the right-hand member of fixed cover is fixedly connected with the second core; Be provided with projection between through hole and the second housing, fixed cover is fixedly connected with projection.
As the improvement of technique scheme, described fixed cover left end is provided with the first annulus, fixed cover right-hand member is provided with the second annulus, fixed cover and be integral type structure between the first annulus and the second annulus, be interference fit between first annulus with the first core and contact compression, be interference fit between the second annulus with the second core and contact compression.
As the improvement of technique scheme, before and after described fixed cover, both sides are provided with the 3rd groove, and the 3rd is interference fit between groove with projection and contacts compression.
Technique scheme adopts in the second housing, be provided with connection the first groove and the second groove, is connected in parallel technical scheme between the first core and the second core, reduces the content of epoxy resin of capacitor package, and cost reduces.Capacitor core adopts two core parallel connections, and the total contact area between epoxy resin and core increases, and the radiating efficiency of capacitor uprises; The conduction oil adopting thermal conductivity more excellent in capacitor X, further improves the radiating efficiency of capacitor, meets high power capacitor radiating requirements.Fixed cover is adopted to be fixed in the middle of the first groove and the second groove by the first core and the second core, the first core and the second core floating technological deficiency during solution encapsulated epoxy resin.Adopt single core less thick in the capacitor of two core parallel connections, the metallized film number of plies reduces, and the probability that single core produces hot melt phenomenon reduces, and the security performance of capacitor strengthens.
Accompanying drawing explanation
Fig. 1 is power capacitor structural representation described in the utility model;
Fig. 2 is the main cutaway view of power capacitor described in the utility model;
Fig. 3 is the second shell structure schematic diagram in described power capacitor;
Fig. 4 is the fixed cover structural representation in described power capacitor.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
See also Fig. 1 and Fig. 2, Fig. 1 is power capacitor structural representation described in the utility model, and Fig. 2 is that power capacitor described in the utility model founds main cutaway view.Described Novel power capacitor, comprises the first housing 10 and cover plate 40, and arrange the second housing 20, first housing 10 in the first housing 10 center of inside and be fixedly connected with cover plate 40 with the second housing 20, the second housing 20 is made up of plastics or elastomeric material; Be provided with space between first housing 10 and the second housing 20, in this space, fill the conduction oil of excellent radiation performance.
As shown in Figure 3, Fig. 3 is the second shell structure schematic diagram in described power capacitor.Being provided with the capacitance placing the first core 50, first core 50 rolled by metallized film in the middle of circular first groove 21 and circular second groove 22, first groove 21 in second housing 20 is C
1, the volume of the first core 50 is V
1; The capacitance placing the second core 60, second core 60 rolled by metallized film in the middle of second groove 22 is C
2, the volume of the second core 60 is V
2; Be connected by conductor in parallel between first core 50 with the second core 60, the condenser capacity after parallel connection is C.According to electrical principles, after in parallel, equivalent capacity is each capacitance sum, i.e. C=C
1+ C
2.Find in practice, adopt the first core 50 and the second core 60 parallel connection to make the capacitor X that capacity is C, adopt single core M to make capacitor Y that capacity is C, the volume of core M is V; Because metallized film specification is different, roll the factor impacts such as number of plies difference and rolling technology, V < V
1+ V
2, general (V
1+ V
2)/V=1.4 ~ 1.9.Toward between the first groove 21 and the second groove 22 during injection ring epoxy resins, cumulative volume due to the first core 50 and the second core 60 is greater than the volume of core M, in the groove of equal volume, capacitor X uses the number ratio capacitor Y of epoxy resin few, because epoxy resin price is far above metallized film, capacitor X ratio capacitance device Y cost is low.
For convenience of the circulation of epoxy resin, be provided with through hole 23 between the first groove 21 and the second groove 22, through hole 23 is communicated with the first groove 21 and the second groove 22.Protruding 20a is formed between through hole 23 and the second housing 20.
Density due to the first core 50 and the second core 60 is less than the density of epoxy resin, in injection ring epoxy resins process, first core 50 and the second core 60 can float, not only affect follow-up installation, and first core 50 and the position of the second core 60 in the first groove 21 and the second groove 22 constantly change, be unfavorable for that epoxy resin wraps up the first core 50 and the second core 60.Therefore be provided with between the first core 50 and the second core 60 and have flexible fixed cover 30, fixed cover 30 is made up of plastics or elastomeric material; First core 50 and the second core 60 are fixed on the two ends, left and right of fixed cover 30 respectively, the first core 50 be fixed and the second core 60 are put in the first groove 21 and the second groove 22 respectively, is used by fixed cover 30 PUR to be fixed on protruding 20a centre position.The first core 50 after fixing and the second core 60 can not float when injection ring epoxy resins.
As shown in Figure 4, Fig. 4 is the fixed cover structural representation in described power capacitor.Fixed cover 30 left end is provided with the first annulus 31, the first core 50 is inserted in the first annulus 31, is interference fit and contacts compression between the first core 50 with the first annulus 31; Fixed cover 30 right-hand member is provided with the second annulus 32, the second core 60 is inserted in the second annulus 32, is interference fit and contacts compression between the second core 60 with the second annulus 32; Before and after fixed cover 30, both sides are provided with the 3rd groove the 33, three groove 33 and are interference fit contact compression between protruding 20a; For strengthening fixed effect, between the 3rd groove 33 and protruding 20a, using PUR to fix, fixed cover 30 is fixedly connected on protruding 20a centre position.Fixed cover 30 is adopted to fix the first core 50 and the second core 60, not only prevent first core 50 at fixed cover about 30 two ends when injection ring epoxy resins and the second core 60 from floating, and the first core 50 and the second core 60 are separately fixed at the first groove 21 and the second groove 22 middle position, facilitate epoxy resin encapsulated, ensure that epoxy resin wraps the first core 50 and the second core 60 completely.
In the above-described embodiments, adopting the first core 50 and the second core 60 parallel connection to make capacity is that the capacitor X of C makes relative to single core M the capacitor Y that capacity is C, and cost reduces.And in epoxy resin and the total contact area rate capacitor Y between the first core 50 and the second core 60, the contact area of core M and epoxy resin is large, and contact area increases, and the radiating efficiency of capacitor uprises; The conduction oil adopting thermal conductivity more excellent in capacitor X, further improves the radiating efficiency of capacitor, meets high power capacitor radiating requirements.
According to electrical principles, the number of plies of single core is more, and in metallized film, the static pressure of breakdown point is larger; The static pressure of breakdown point is larger, the thickness of core is larger, larger at the energy of release during metallized film success self-healing; This Conversion of Energy is electric arc, and under the high temperature action of electric arc, the organic dielectric thin film of local softens, and produces hot melt phenomenon, and severe patient causes capacitor short-circuit to lose efficacy, on fire from explosion.Therefore the core M thickness in capacitor X in the thickness of the first core 50 or the Thickness Ratio capacitor Y of the second core 60 is little, and the metallized film number of plies is few; The probability that first core 50 or the second core 60 produce hot melt phenomenon reduces, and the capacitor X security performance be made up of the first core 50 and the second core 60 parallel connection strengthens.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (4)
1. a Novel power capacitor, comprise the first housing (10), cover plate (40), the first core (50) and the second core (60), described first housing (10) bosom arranges the second housing (20), be provided with gap between second housing (20) and the first housing (10), described first housing (10) is fixedly connected with cover plate (40) with the second housing (20); Be connected in parallel between described first core (50) and the second core (60); It is characterized in that: in described second housing (20), be provided with circular first groove (21) and circular second groove (22), described first core (50) is arranged on the first groove (21) centre position, and described second core (60) is arranged on the second groove (22) centre position; Be provided with through hole (23) between described first groove (21) and the second groove (22), through hole (23) is communicated with the first groove (21) and the second groove (22).
2. a kind of Novel power capacitor according to claim 1, it is characterized in that: between described first core (50) and the second core (60), be provided with flexible fastening cover (30), the left end of fixed cover (30) is fixedly connected with the first core (50), and the right-hand member of fixed cover (30) is fixedly connected with the second core (60); Be provided with projection (20a) between described through hole (23) and the second housing (20), described fixed cover (30) is fixedly connected with protruding (20a).
3. a kind of Novel power capacitor according to claim 2, it is characterized in that: described fixed cover (30) left end is provided with the first annulus (31), described fixed cover (30) right-hand member is provided with the second annulus (32), described fixed cover (30) and be integral type structure between the first annulus (31) and the second annulus (32); Described first annulus (31) is interference fit with between the first core (50) and contacts compression, and described second annulus (32) is interference fit with between the second core (60) and contacts compression.
4. a kind of Novel power capacitor according to claim 2, is characterized in that: before and after described fixed cover (30), both sides are provided with the 3rd groove (33), is interference fit and contacts compression between the 3rd groove (33) with protruding (20a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520417912.9U CN204668158U (en) | 2015-06-17 | 2015-06-17 | A kind of Novel power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520417912.9U CN204668158U (en) | 2015-06-17 | 2015-06-17 | A kind of Novel power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204668158U true CN204668158U (en) | 2015-09-23 |
Family
ID=54138517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520417912.9U Expired - Fee Related CN204668158U (en) | 2015-06-17 | 2015-06-17 | A kind of Novel power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204668158U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111066107A (en) * | 2017-09-20 | 2020-04-24 | 松下知识产权经营株式会社 | Capacitor with a capacitor element |
-
2015
- 2015-06-17 CN CN201520417912.9U patent/CN204668158U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111066107A (en) * | 2017-09-20 | 2020-04-24 | 松下知识产权经营株式会社 | Capacitor with a capacitor element |
| CN111066107B (en) * | 2017-09-20 | 2021-12-07 | 松下知识产权经营株式会社 | Capacitor with a capacitor element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20180617 |