CN204270878U - High frequency power capacitor - Google Patents
High frequency power capacitor Download PDFInfo
- Publication number
- CN204270878U CN204270878U CN201420706237.7U CN201420706237U CN204270878U CN 204270878 U CN204270878 U CN 204270878U CN 201420706237 U CN201420706237 U CN 201420706237U CN 204270878 U CN204270878 U CN 204270878U
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- China
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- capacitor core
- metal spraying
- capacitor
- spraying face
- core group
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- Withdrawn - After Issue
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Abstract
The utility model relates to a kind of High frequency power capacitor, comprise cover plate assembly, shell and fixing capacitor core group in the enclosure, the capacitor core that capacitor core group is flattened by several is formed by stacking, capacitor core group is that horizontal state is placed on shell, and the metal spraying face connecting portion of drawing copper strips is electrically connected with the metal spraying face of each capacitor core by welding; Terminal connection part is vertically set on the upper end of metal spraying face connecting portion and consistent with the length of metal spraying face connecting portion.Because capacitor core group takes horizontal placement, the uniform current ground of capacitor core is by drawing copper strips, heat distribution uniform, and heat dispersion is better, and height can be adopted to compress coefficient and make dry-type capacitor, and volume is little, and security performance is good.
Description
Technical field
The utility model relates to a kind of High frequency power capacitor be applicable under high frequency operating mode.
Background technology
Along with the switching frequency of power electronic equipment is more and more higher, capacitor is as components and parts conventional in power electronic equipment, and its stability run in high frequency (frequency is at more than 2000Hz) situation decides the stability of power electronic equipment.Usually, High frequency power capacitor is often limited to size and the manufacturing cost of its volume.Its internal capacitance fuse of common High frequency power capacitor is generally cylindrical core, and when identical capacity, its volume can be bigger than normal, and cost also can be higher.
In order to small capacitor volume, capacitor core group is also by adopting the capacitor core flattened to form, disclosed in patent documentation CN103021656A, switching frequency is exactly have employed the molecular core group of this capacitance core by flattening higher than the High frequency power capacitor of 2000Hz, capacitor core group adopts vertical in the enclosure, namely many flattening formula capacitor cores are upwards formed by stacking successively, the height of each fuse in core group is inconsistent, the electric current of each fuse mutually superposes on top when by drawing copper strips, make to draw the CURRENT DISTRIBUTION that copper strips passes through uneven, namely draw that copper strips lower current density is little and top current density is large.Under high frequency operating mode, this current density inequality very easily causes local overheating, has influence on capacitor and normally uses and even burn out capacitor.
Summary of the invention
The purpose of this utility model is to provide a kind of High frequency power capacitor, and not only volume is little, and homogeneous current distribution, and under high frequency operating mode, security performance is good.
The utility model is achieved in that and comprises cover plate assembly, shell and fixing capacitor core group in the enclosure, the capacitor core that capacitor core group is flattened by several is formed by stacking, metal spraying face, capacitor core group both sides is electrically connected with respectively the extraction copper strips as positive and negative electrode, each extraction copper strips has the metal spraying face connecting portion be electrically connected with metal spraying face and the terminal connection part be electrically connected with the leading-out terminal on cover plate assembly; Described capacitor core group is that horizontal state is placed on shell, each capacitor core is vertically placed in shell and has a non-metal spraying face to be in upper end; The length of each extraction copper strips at least can all capacitor core metal spraying faces of covering capacitor core group, and the metal spraying face connecting portion of drawing copper strips is electrically connected with the metal spraying face of each capacitor core by welding; Terminal connection part is vertically set on the upper end of metal spraying face connecting portion and consistent with the length of metal spraying face connecting portion.Because capacitor core group takes horizontal state to place, all capacitor cores are arranged in juxtaposition, the electric current of each capacitor core is also advanced into the metal spraying connecting portion of drawing copper strips, and the terminal connection part through top converges on the extraction wire that is connected with terminal, electric current is distribution uniform on extraction copper strips, heat distribution uniform, and extraction copper strips length is longer, make terminal connection part surface area comparatively large, can be gone out by the heat diffusion produced by electric current better, heat dispersion is better.
In order to enter extraction copper strips with making the uniform current of each capacitor core, the metal spraying face connecting portion of drawing copper strips is connect by the metal spraying face upper electrical of welding with each capacitor core, and the metal spraying basifacial of each capacitor core is electrically connected with metal spraying face connecting portion by copper conductor.
The compression coefficient of capacitor core group is 0.95 ~ 1.0.Adopt high compression coefficient, capacitor small volume, farthest can save the installing space of capacitor.
A preferred version of the present utility model be the first immersion oil process of capacitor core group and in shell filling polyurethane or epoxy resin to form dry-type capacitor.The first immersion oil process of capacitor core group, can improve dielectric field intensity, dry-type capacitor made by Reperfu-sion polyurethane or epoxy material, can improve the security performance of capacitor.
As shown from the above technical solution, the utility model is by taking horizontal placement by capacitor core group, with making the uniform current of each capacitor core by drawing copper strips, heat distribution uniform, and the terminal connection part surface area of drawing on copper strips is larger, can heat diffusion be gone out better, heat dispersion is better.Simultaneously because electric current in capacitor is uniform, perfect heat-dissipating, capacitance core group can adopt the high coefficient that compresses compress and make dry-type capacitor, not only make capacitor volume less, farthest can save the installing space of capacitor, the fire that wet type capacitor can also be avoided to cause because of leakage of oil, improves the security performance of capacitor.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is capacitor core group perspective view.
In figure, the implication of label symbol is as follows:
1-cover plate assembly 11-leading-out terminal 12-draws wire 2-shell 3-capacitor core group 31-capacitor core 32-metal spraying face 4 and 4a-and draws copper strips 41-metal spraying face connecting portion 42 and 42a-terminal connection part 5-insulation board 6,8 and 8a-solder joint 7-copper conductor 9-insulation cushion
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model comprises cover plate assembly 1, shell 2 and is the capacitor core group 3 that horizontal state is fixed in shell 2.Capacitor core group 3 can be one or several, and be placed in shell 2 after surrounding wrap insulate film outside each capacitor core group 3, dielectric film does not draw in FIG.The positive and negative electrode of capacitor core group 3 is electrically connected with the leading-out terminal 11 on cover plate assembly 1 respectively by extraction wire 12.
Capacitor core group 3 structure is see Fig. 2, and the capacitor core 31 flattened by several is formed by stacking, and in this example, capacitor core group 3 is made up of 17 capacitor cores 31.Each capacitor core 31 of capacitor core group 3 is arranged in juxtaposition in vertical direction, and capacitor core group 3 two ends are provided with the insulation board 5 that epoxy resin material is made, and capacitor core group 3 both sides are provided with metal spraying face 32.
Draw copper strips 4 as the extraction copper strips 4 of positive and negative electrode, 4a, 4a is symmetrical arranged.Draw copper strips 4 and there is the metal spraying face connecting portion 41 be electrically connected with metal spraying face 32 and the terminal connection part 42 be electrically connected with the leading-out terminal 11 on cover plate assembly 1, the length of drawing copper strips 4 at least can the metal spraying face 32 of all capacitor cores 31 of covering capacitor core group 3, the metal spraying face connecting portion 41 of drawing copper strips 4 is connect by metal spraying face 32 upper electrical of welding with each capacitor core 31, in figure, solder joint 6 is arranged between two capacitor cores 31 and also partly covers two capacitor cores 31, the electric current of both sides capacitor core 31 is flow on the metal spraying connecting portion 41 of extraction copper strips 4 through solder joint 6.The bottom, metal spraying face 32 of each capacitor core 31 is electrically connected with metal spraying face connecting portion 32 by copper conductor 7, and in figure 8,8a is the solder joint at copper conductor 7 two ends.The solder joint 8 at copper conductor 7 two ends, 8a are preferably on upright position, adjacent two copper conductors can length to stagger setting, the electric current of each capacitor core 31 is evenly distributed in through corresponding copper conductor 7 draw on copper strips 4, makes the current density of metal spraying face connecting portion 41 on mutually level cross section of drawing copper strips 4 consistent as far as possible.
Terminal connection part 42 is vertically set on the upper end of metal spraying face connecting portion 41 and consistent with the length of metal spraying face connecting portion 41, terminal connection part 42 is supported on the non-metal spraying face, upper end of capacitor core group 3, several layers of insulation cushion 9 are provided with between terminal connection part 42 and the non-metal spraying face of capacitor core group 3 upper end, the end of upper strata insulation cushion 9 is drawn between copper strips 4, the terminal connection part 42 of 4a, 42a by two and is extended out, and isolates carrying out insulation between terminal connection part 42,42a.
The compression coefficient of capacitor core group 3 is 0.95 ~ 1.0.
The utility model capacitor core group 3 adopts immersion oil process.When after capacitor core group 3 and cover plate assembly 1 installation, filling polyurethane or epoxy resin in shell 2, make dry-type capacitor.
It is pointed out that the utility model also can pour into vegetable oil or other insulating heat-conductives oil in the enclosure, make wet type capacitor.
Claims (4)
1. High frequency power capacitor, comprise cover plate assembly (1), shell (2) and fixing capacitor core group (3) in the enclosure, the capacitor core (31) that capacitor core group (3) is flattened by several is formed by stacking, metal spraying face, capacitor core group both sides (32) is electrically connected with respectively as just, the extraction copper strips (4 of negative electrode, 4a), each extraction copper strips (4) has metal spraying face connecting portion (41) be electrically connected with metal spraying face (32) and the terminal connection part (42) be electrically connected with the leading-out terminal (11) on cover plate assembly (1), it is characterized in that: described capacitor core group (3) is placed on shell (2) in horizontal state, each capacitor core (31) is vertically placed in shell (2) and has a non-metal spraying face to be in upper end, the length of each extraction copper strips (4) at least can all capacitor core metal spraying faces (32) of covering capacitor core group, and metal spraying face connecting portion (41) of drawing copper strips is electrically connected with the metal spraying face (32) of each capacitor core by welding, terminal connection part (42) is vertically set on the upper end in metal spraying face connecting portion (41) and consistent with the length in metal spraying face connecting portion (41).
2. High frequency power capacitor according to claim 1, it is characterized in that: metal spraying face connecting portion (41) of drawing copper strips is connect by metal spraying face (32) upper electrical of welding with each capacitor core (31), and metal spraying face (32) bottom of each capacitor core (31) is electrically connected with metal spraying face connecting portion (41) by copper conductor (7).
3. High frequency power capacitor according to claim 2, is characterized in that: the compression coefficient of capacitor core group (3) is 0.95 ~ 1.0.
4. High frequency power capacitor according to claim 3, is characterized in that: capacitor core group (3) through immersion oil process and in shell (2) filling polyurethane or epoxy resin to form dry-type capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420706237.7U CN204270878U (en) | 2014-11-21 | 2014-11-21 | High frequency power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420706237.7U CN204270878U (en) | 2014-11-21 | 2014-11-21 | High frequency power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204270878U true CN204270878U (en) | 2015-04-15 |
Family
ID=52805731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420706237.7U Withdrawn - After Issue CN204270878U (en) | 2014-11-21 | 2014-11-21 | High frequency power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204270878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465081A (en) * | 2014-11-21 | 2015-03-25 | 安徽铜峰电子股份有限公司 | High frequency power capacitor |
-
2014
- 2014-11-21 CN CN201420706237.7U patent/CN204270878U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465081A (en) * | 2014-11-21 | 2015-03-25 | 安徽铜峰电子股份有限公司 | High frequency power capacitor |
| CN104465081B (en) * | 2014-11-21 | 2017-08-25 | 安徽铜峰电子股份有限公司 | RF power capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150415 Effective date of abandoning: 20170825 |