CN206947179U - A kind of super high power three-level converter direct current capacitors - Google Patents
A kind of super high power three-level converter direct current capacitors Download PDFInfo
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- CN206947179U CN206947179U CN201720964574.XU CN201720964574U CN206947179U CN 206947179 U CN206947179 U CN 206947179U CN 201720964574 U CN201720964574 U CN 201720964574U CN 206947179 U CN206947179 U CN 206947179U
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- center
- copper foil
- insulation
- shell
- direct current
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Abstract
The utility model discloses a kind of super high power three-level converter direct current capacitors, and capacitor is made up of shell, center, binding post, the resin of filling and pressure relief valve.Shell includes housing, shell bottom and cap.Center includes element, connection copper foil, Intermediate insulator, fixed insulation plate, insulation protection part, bottom insulation, electric outlet copper foil, corner guard member, binder and capping insulation.Binding post covers installed in capacitor protector, is connected with the electric outlet copper foil of center, is made up of insulator, round nut, guide rod and sealing ring.Pressure relief valve covers installed in capacitor protector.The resin of filling includes the resin of gap filling between gap, interelement gap and center and shell between center, and material is polyurethane.Direct current capacitors of the present utility model, there is small caloric value, perfect heat-dissipating, insulation electric strength is high, tolerance high current ability is strong, inductance is low, safe for operation, dry type oil-free No leakage.
Description
Technical field
It the utility model is related to a kind of metallization film capacitor, and in particular to a kind of super high power three-level converter is with directly
Flow capacitor.
Background technology
Frequency converter is the electric energy control that power frequency supply is transformed to another frequency using the on-off action of power semiconductor device
Device processed, and high voltage converter refers to big-power transducer of the input supply voltage in more than 3000V, mains voltage grade has
The high-voltage high-power frequency transformator of the voltage class such as 3000V, 3300V, 6000V, 6600V, 10000V.
High voltage converter can be divided into two level, three level, five level and multi-level frequency conversion device according to output level number.
" level " just refers in circuit the relative ratio of or some electricity under same impedance at 2 points.Three level are exactly three kinds
Level：High level V/2, zero level 0V, low level-V/2.The control technology of three level is mainly used in frequency converter, three level
Frequency converter uses clamp circuit, solves the problems, such as the series connection of two power devices, and phase voltage output is had three level.
Three-level converter has the performance outstanding than two level converters, becomes reducing output harmonic wave content, improving
Frequency device efficiency, the service life for extending motor, the job stability etc. that improves system improve a lot.Three level become
Frequency device is widely used in for the reliability to equipment such as power system, colliery, urban water supply, offshore platform, security requirement
Very high application scenario.
Three-level converter is three kinds of level：High level V/2, zero level 0V, low level-V/2.Usual voltage V/2 numerical value
In 2000 ~ 4000V, V's is just very high, and numerical value is 4000 ~ 8000V.
Three-level converter transducer power super large, power reach usual 20 ~ 40MW, and maximum power has 50MW.Need to store up
The direct current capacitors electric current that can be acted on is bigger, and required capacitance is smaller.Because frequency converter is cabinet type structure, direct current capacitors
Size is also restricted.
Therefore, the direct current capacitors for playing energy storage in the three-level converter of super high power just needs following characteristic：Need
Want the capacitor unit of 2 groups of independence, be connected in series during use；Voltage ratio is higher, and dielectric strength will meet to require；Electric current is big；It is low
Inductance.So as to which this kind of capacitor needs to consider emphatically：Internal insulation system；Radiator structure.Solve above-mentioned key technology just into
For the key point captured needed for the research and development of this kind of capacitor.
The content of the invention
In order to solve above-mentioned key technology, the utility model provides a kind of super high power three-level converter DC capacitor
Device（Hereinafter referred to as " capacitor "）.
Technical scheme is as follows used by the utility model solves the problems, such as.
Capacitor is made up of shell, center, binding post, the resin of filling and pressure relief valve.Shell includes housing, shell
Bottom and cap, material are stainless steel, prevent from operationally getting rusty and influenceing the radiating effect of appearance.Center includes element, connection
Copper foil, Intermediate insulator, fixed insulation plate, insulation protection part, bottom insulation, electric outlet copper foil, corner guard member, wrapping
Band and capping insulation.Center is made up of four careful sons, and small center is rearranged by more element in parallel and welded by coupling copper foil
Connect composition, two small one group of center, totally two groups, equipped with Intermediate insulator, insulation protection part, four sides of center between small center
Angle Zhuan Douyou corners guard member, the upper and lower both sides that fixed insulation plate is placed on four small centers are bound by binder, electric outlet
Copper foil passes through from the hole of fixed insulation plate above, and center has bottom insulation with shell bottom.Binding post is arranged on capacitor protector
Cover, be connected with the electric outlet copper foil of center, be made up of insulator, round nut, guide rod and sealing ring.Pressure relief valve is installed
Covered in capacitor protector.The resin of filling includes the tree of gap filling between gap, interelement gap and center and shell between center
Fat, material are polyurethane.Element uses cylindrical shape, by metallized film on plug, the gilding layer of both ends, has local
The performance of self-healing after breakdown.Insulation protection part material is polyester film, high temperature resistant.Fixed insulation plate material is epoxy plate, thickness
4mm.Corner guard member material is polyester film, high temperature resistant.Intermediate insulator material is polyurethane, good flame resistance.
Further, four centers are divided into two groups of arrangements, every group of two small centers, element one end metal spraying face of its small center
Towards the element metal spraying face of another set, welded again with binding post after the welding of connection copper foil, the welding of electric outlet copper foil
Together, this spray plane is pressed considers that one piece of Intermediate insulator, but an other metal spraying for every group of two small centers are put in centre with current potential
The current potential in face is with regard to full voltage, it is necessary to put 1 piece of very thick Intermediate insulator, while both sides also need respectively to put an insulation protection part, folding
Into U-shaped, this addresses the problem built-in electrical insulation problem.
Further, element uses cylindrical shape, itself can reduce the loss tangent of capacitor, while equivalent electric
Resistance also reduces, and the connection copper foil in center is stamped to form using monoblock copper foil, and area of dissipation is big, while also reduces welding factor and draw
The resistance risen, in addition, the electric outlet copper foil in center uses wide thin copper foil, to reduce connection resistance, and is advantageous to center
Preferably radiating.
The beneficial effects of the utility model are：A kind of three-level converter direct current capacitors is provided, have caloric value it is small,
The spies such as perfect heat-dissipating, insulation electric strength are high, tolerance high current ability strong, inductance is low, safe for operation, dry type oil-free No leakage
Point.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is Fig. 1 vertical view structural map.
Fig. 3 is Fig. 1 main view sectional structural map.
Fig. 4 is Fig. 1 left view sectional structural map.
Fig. 5 is Fig. 2 A-A partial top sectional structural maps.
Fig. 6 is Fig. 2 B main view sectional structural maps.
In figure, 1- shells；2- centers；3- binding posts；The resin of 4- fillings；5- pressure relief valves；
11- housings；12- shells bottom；13- caps；The small centers of 20-；21- elements；22- couples copper foil；23- Intermediate insulators；
24- fixed insulation plates；25- insulation protection parts；26- bottom insulations；27- electric outlet copper foils；28- corners guard member；29- bags
Band；Insulate 210- end faces；31- insulators；32- round nuts；33- guide rods；34- sealing rings；211- plugs；212- metallization is thin
Film；213- gilding layers.
Embodiment
The utility model is further described below in conjunction with the drawings and specific embodiments.
It is visible in Fig. 1, capacitor mainly by shell (1), center (2), binding post (3), filling resin (4) and
Pressure relief valve (5) is formed.Shell (1) is made up of housing (11), shell bottom (12) and cap (13).
Visible in fig. 2, binding post (3) is arranged on the cap (13) of shell (1).Upper upper and lower two row of cap (13)
Respectively there are 4 binding posts (3), totally 8 binding posts (3).Binding post (3a) and binding post (3b) are the electricity of 1 group capacitor
Pole, binding post (3c) and binding post (3d) are the electrodes of 1 group capacitor, and binding post (3e) and binding post (3f) are 1
The electrode of group capacitor, binding post (3g) and binding post (3h) are the electrodes of 1 group capacitor.Wherein, binding post (3a)
With binding post (3e) same to current potential, current potential "+"；Binding post (3b) and binding post (3f) same to current potential, current potential " 0 "；Terminals
Sub (3c) and binding post (3g) same to current potential, current potential " 0 "；Binding post (3d) and binding post (3h) same to current potential, current potential "-".
In figure 3 it can be seen that center (2) includes element (21), connection copper foil (22), Intermediate insulator (23), fixed insulation
Plate (24), insulation protection part (25), bottom insulation (26), electric outlet copper foil (27), corner guard member (28), binder
(29) and (210) are insulated in end face.Center (2) is made up of four small center (20), and small center (20) is in parallel by more elements (21)
Rearrange and formed by coupling copper foil welding (22), two small (20) one groups of center, totally two groups, is equipped between small center (20)
Intermediate insulator (23), insulation protection part (25), four corners Zhuan Douyou corners guard member (28) of center (2), fixed insulation
The upper and lower both sides that plate (24) is placed on four small center (20) are bound by binder (29), and electric outlet copper foil (27) is from above
The hole of fixed insulation plate pass through, center (2) has bottom insulation (26) with shell bottom (12).
Between center (2) and housing main body (11), between center (2) and shell bottom (11) and interelement fills up the resin of filling
(4).Insulation protection part (25) between element (21) is converted into U-typed, also Intermediate insulator (23), and gap is stayed between element (21)
There is 4mm or so, this part is the most important insulation of built-in electrical insulation structure.Fixed insulation plate (24) is placed on the upper and lower of element (21) group
Both sides are bound by binder (29), and fixed insulation plate (24) above has hole, and center (2) electric outlet copper foil (27) can be worn
Cross.Binding post (3) is connected with the electric outlet copper foil (27) of the center (2) through fixed insulation plate (24) hole.Between center (2)
The resin (4) of filling is filled up in gap and interelement (21) gap.Element (21) rolls by special equipment to be formed, by plug
(211), metallized film (212) winding, both ends gilding layer（213）Form, there is the performance of self-healing after partial breakdown.Element
(21) cylindrical form is used, is on the one hand advantageous to radiate, while equivalent series resistance can be reduced.
Visible in Fig. 4, the electrode between two set of pieces (21) group belongs to same current potential, and Intermediate insulator (23) thickness 1 ~
2mm, the upper and lower each one block of fixed insulation plate (24) of fuse equipped with element (21) and Intermediate insulator (23), pass through two wrappings
Band (29) is bound.Element (21) is needed by special procedures such as press fitting, sizing, thermal polymerizations.
Visible in Figure 5, center is made up of four set of pieces (21) group.The gilding layer (213) of element (21) forms capacitor
Electrode.Idiostatic element (21) interelectrode Intermediate insulator (23) 1 ~ 2mm of thickness.Element (21) electricity of different potentials
Intermediate insulator (23) thickness 4mm of interpolar, while have the insulation protection part (25) of U-typed.Element (21) and housing main body
(11) corner between is equipped with corner guard member (28), while has four pieces of Intermediate insulators (23), thickness 2mm.Couple copper foil
(22) bottom is lined with end face insulation (210).
Visible in figure 6, binding post (3) binding post is arranged on cap (13), by insulator (31), round nut
(32), guide rod (33) and sealing ring (34) are formed.
Connection copper foil (22) is formed by mould punching, is so reduced the welding between copper foil, is reduced contact resistance, lowers
Equivalent resistance, while lower the inductance of external loop.
It is pointed out that the utility model uses capacitor internal casting resin, while the utility model also can be outside
Cast vegetable oil or other insulating heat-conductives oil, are made oil immersed type capacitor in shell.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
Be confined to this, any one skilled in the art the invention discloses technical scope in, the change that can readily occur in
Change or replace, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with power
The protection domain that profit requires is defined.
Claims (3)
- A kind of 1. super high power three-level converter direct current capacitors, it is characterised in that：The capacitor by shell, center, Binding post, the resin of filling and pressure relief valve composition, the shell include housing, shell bottom and cap, center including element, Couple copper foil, Intermediate insulator, fixed insulation plate, insulation protection part, bottom insulation, electric outlet copper foil, corner guard member, Binder and capping insulation, the center are made up of four careful sons, and the small center is rearranged logical by more element in parallel Cross connection copper foil to be welded to form, equipped with Intermediate insulator, insulation protection part, four corners of the center between the small center Dress has corner guard member, and the upper and lower both sides that the fixed insulation plate is placed on four small centers are bound by binder, the electricity Gas outlet copper foil passes through from the hole of fixed insulation plate above, and the center has bottom insulation, the binding post with shell bottom Covering installed in capacitor protector, be connected with the electric outlet copper foil of center, the pressure relief valve covers installed in capacitor protector, The resin of the filling includes the resin of gap filling between gap, interelement gap and center and shell between center.
- 2. super high power three-level converter direct current capacitors according to claim 1, it is characterised in that：It is described careful There are Intermediate insulator and insulation protection part between son, insulation protection part is " u "-shaped.
- 3. super high power three-level converter direct current capacitors according to claim 1, it is characterised in that：The connection Copper foil is stamped to form using monoblock copper foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720964574.XU CN206947179U (en) | 2017-08-03 | 2017-08-03 | A kind of super high power three-level converter direct current capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720964574.XU CN206947179U (en) | 2017-08-03 | 2017-08-03 | A kind of super high power three-level converter direct current capacitors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206947179U true CN206947179U (en) | 2018-01-30 |
Family
ID=61372021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720964574.XU Withdrawn - After Issue CN206947179U (en) | 2017-08-03 | 2017-08-03 | A kind of super high power three-level converter direct current capacitors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206947179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275087A (en) * | 2017-08-03 | 2017-10-20 | 无锡市电力滤波有限公司 | A kind of super high power three-level converter direct current capacitors |
-
2017
- 2017-08-03 CN CN201720964574.XU patent/CN206947179U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107275087A (en) * | 2017-08-03 | 2017-10-20 | 无锡市电力滤波有限公司 | A kind of super high power three-level converter direct current capacitors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20190607 |