CN107275087A - 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
- Publication number
- CN107275087A CN107275087A CN201710657971.7A CN201710657971A CN107275087A CN 107275087 A CN107275087 A CN 107275087A CN 201710657971 A CN201710657971 A CN 201710657971A CN 107275087 A CN107275087 A CN 107275087A
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- Prior art keywords
- center
- copper foil
- insulation
- shell
- direct current
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
- H01G4/385—Single unit multiple capacitors, e.g. dual capacitor in one coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/08—Cooling arrangements; Heating arrangements; Ventilating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
Abstract
The present invention 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 is covered installed in capacitor protector, is connected, is made up of insulator, round nut, guide rod and sealing ring with the electric outlet copper foil of center.Pressure relief valve is covered 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.The direct current capacitors of the present invention, with caloric value is small, perfect heat-dissipating, insulation electric strength is high, tolerance high current ability is strong, inductance is low, operation safety, dry type oil-free No leakage the features such as.
Description
Technical field
The present invention relates to a kind of metallization film capacitor, and in particular to a kind of super high power three-level converter direct current
Container.
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, the problem of solving 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, in reduction output harmonic wave content, improves change
Improved a lot in terms of frequency device efficiency, the service life for extending motor, the job stability of raising system.Three level become
Frequency device is widely used in reliability for power system, colliery, urban water supply, offshore platform etc. to equipment, 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 reaches usual 20 ~ 40MW, and maximum power has 50MW.Need storage
The direct current capacitors electric current that can be acted on is smaller than larger, required capacitance.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 is accomplished by following characteristic：Need
The capacitor unit of 2 groups of independence is wanted, is connected in series when using；Voltage ratio is higher, and dielectric strength will meet requirement；Electric current is big；It is low
Inductance.So as to which this kind of capacitor focuses on to need to consider：Internal insulation system；Radiator structure.Solve above-mentioned key technology just into
The key point captured for needed for being researched and developed this kind of capacitor.
The content of the invention
In order to solve above-mentioned key technology, the present invention provides a kind of super high power three-level converter direct current capacitors
（Hereinafter referred to as " capacitor "）.
It is of the present invention to solve the problems, such as that used technical scheme is as follows.
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 many element in parallel and welded by coupling copper foil
Connect composition, two small one group of center, is equipped with Intermediate insulator, insulation protection part, four sides of center between small center by totally two groups
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
The hole of copper foil from fixed insulation plate above is passed through, and center has bottom insulation with shell bottom.Binding post is arranged on capacitor protector
Cover, be connected, be made up of insulator, round nut, guide rod and sealing ring with the electric outlet copper foil of center.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 is polyurethane.Element uses cylindrical shape, by metallized film on plug, the gilding layer of two ends, with part
Puncture the performance of rear self-healing.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 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 the loss tangent of capacitor can be reduced, 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, draws while also reducing welding factor
The resistance risen, in addition, the electric outlet copper foil in center uses wide thin copper foil, to reduce connection resistance, and is conducive to center
Preferably radiating.
The beneficial effects of the invention are as follows：The present invention provides a kind of three-level converter direct current capacitors, internal heat dissipating is good,
Good insulation preformance, strong current capacity, low inductance, low ESR can be born, while there is operation safety and stability, more may be used
By property, free of contamination advantage.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
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. 3 A-A partial top sectional structural maps.
Fig. 6 is Fig. 3 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- consolidates
Determine insulation board；25- insulation protection parts；26- bottom insulations；27- electric outlet copper foils；28- corners guard member；29- binders；
210- end faces insulate；31- insulators；32- round nuts；33- guide rods；34- sealing rings；211- plugs；212- metallized films；
213- gilding layers.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
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 constituted.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 end face insulation (210).Center (2) is made up of four small center (20), and small center (20) is in parallel by many elements (21)
Rearrange and constituted by coupling copper foil welding (22), two small (20) one groups of center, is equipped between small center (20) totally by two groups
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 gap between " U " type, also Intermediate insulator (23), element (21) and stayed
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) is rolled by special equipment and formed, by plug
(211), metallized film (212) winding, two ends gilding layer（213）Form, the performance with self-healing after partial breakdown.Element
(21) cylindrical form is used, is on the one hand conducive to radiating, 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) passes through two wrappings
Band (29) is bound.The special procedures such as element (21) is needed by press-fiting, shaping, thermal polymerization.
Visible in Figure 5, center is made up of four set of pieces (21) group.The gilding layer (213) of element (21) constitutes 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 there is the insulation protection part (25) of " U " type.Element (21) and housing main body
(11) corner between is equipped with corner guard member (28), while having 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 constituted.
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 lowering the inductance of external loop.
It is pointed out that the present invention uses capacitor internal casting resin, while the present invention can also be poured into a mould in shell
Vegetable oil or other insulating heat-conductives oil, are made oil immersed type capacitor.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (3)
1. a kind of super high power three-level converter direct current capacitors, it is characterised in that：The capacitor by shell, center,
Binding post, filling resin and pressure relief valve composition, the shell include housing, shell bottom and cap, center include 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 many element in parallel
Cross connection copper foil to be welded to form, Intermediate insulator, insulation protection part, four corners of the center are housed 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
The hole of gas outlet copper foil from fixed insulation plate above is passed through, and the center has bottom insulation, the binding post with shell bottom
Cover, be connected with the electric outlet copper foil of center, the pressure relief valve is covered installed in capacitor protector 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 |
|---|---|---|---|
| CN201710657971.7A CN107275087B (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 |
|---|---|---|---|
| CN201710657971.7A CN107275087B (en) | 2017-08-03 | 2017-08-03 | A kind of super high power three-level converter direct current capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107275087A true CN107275087A (en) | 2017-10-20 |
| CN107275087B CN107275087B (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710657971.7A Active CN107275087B (en) | 2017-08-03 | 2017-08-03 | A kind of super high power three-level converter direct current capacitors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111312519A (en) * | 2020-02-26 | 2020-06-19 | 四川省科学城久信科技有限公司 | Pulse capacitor and technological process thereof |
| CN113053665A (en) * | 2021-03-23 | 2021-06-29 | 深圳市汇北川电子技术有限公司 | High-voltage pulse capacitor adopting core groups connected in series and preparation method thereof |
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| CN101930848A (en) * | 2009-06-22 | 2010-12-29 | 佛山市顺德区创格电子实业有限公司 | Double-cooling capacitor |
| CN104143436A (en) * | 2014-07-22 | 2014-11-12 | 安徽鑫阳电子有限公司 | Point-contact-typed explosion-proof capacitor for conductive column |
| CN104867675A (en) * | 2014-12-31 | 2015-08-26 | 刘瑞云 | Capacitor core-insulated assembly type capacitor |
| CN206947179U (en) * | 2017-08-03 | 2018-01-30 | 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 CN201710657971.7A patent/CN107275087B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930848A (en) * | 2009-06-22 | 2010-12-29 | 佛山市顺德区创格电子实业有限公司 | Double-cooling capacitor |
| CN104143436A (en) * | 2014-07-22 | 2014-11-12 | 安徽鑫阳电子有限公司 | Point-contact-typed explosion-proof capacitor for conductive column |
| CN104867675A (en) * | 2014-12-31 | 2015-08-26 | 刘瑞云 | Capacitor core-insulated assembly type capacitor |
| CN206947179U (en) * | 2017-08-03 | 2018-01-30 | 无锡市电力滤波有限公司 | A kind of super high power three-level converter direct current capacitors |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111312519A (en) * | 2020-02-26 | 2020-06-19 | 四川省科学城久信科技有限公司 | Pulse capacitor and technological process thereof |
| CN113053665A (en) * | 2021-03-23 | 2021-06-29 | 深圳市汇北川电子技术有限公司 | High-voltage pulse capacitor adopting core groups connected in series and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN107275087B (en) | 2019-06-07 |
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