CN211181984U

CN211181984U - DC supporting capacitor for mining explosion-proof frequency conversion all-in-one machine

Info

Publication number: CN211181984U
Application number: CN201922213363.4U
Authority: CN
Inventors: 俞广铨; 陈栋
Original assignee: Wuxi Chenrui New Energy Technology Co ltd
Current assignee: Wuxi Chenrui New Energy Technology Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-08-04
Anticipated expiration: 2029-12-11

Abstract

The utility model relates to the technical field of film capacitors, in particular to a DC support capacitor for a mining explosion-proof frequency conversion all-in-one machine, which has small volume, improves the voltage resistance and overcurrent capacity, reduces the heating of capacitance and prolongs the service life, and comprises a shell, a capacitor core and an encapsulating material are arranged in the shell, a leading-out end connected with the capacitor core is arranged on the shell, the leading-out end comprises a leading-out electrode and a composite copper bar, the composite copper bar comprises an upper copper bar arranged on the upper surface of a middle insulating plate and a lower copper bar arranged on the lower surface of the middle insulating plate, leading-out electrodes with different polarities are respectively connected with the upper copper bar and the lower copper bar, the capacitor core comprises a first core group and a second core group, a first connecting copper plate and a second connecting copper plate are respectively arranged on the first core group and the second core group, the end part of the first, the capacitor core is formed by winding a metalized film, and a metal coating is arranged on the metalized film.

Description

DC supporting capacitor for mining explosion-proof frequency conversion all-in-one machine

Technical Field

The utility model relates to a film capacitor technical field specifically is a mining explosion-proof frequency conversion direct current supports condenser for all-in-one.

Background

The frequency converter has been on the market in China for nearly 20 years, and due to the excellent performance and considerable power-saving effect, the frequency converter is widely applied to various industries, and the utilization rate reaches about 30 percent till now. Especially, the development is rapid in the last decade, and the annual increment rate is more than 20%. The application of the mining frequency converter is later than that of other frequency converters, but the development situation is rapid in the last five years, and the mining frequency converter has the trend of the first of all industries. The most fundamental reason is that the lagging electrical equipment cannot meet the requirement of industrial production, the old equipment has low efficiency and large energy consumption, and the technical problems in the development of the explosion-proof industry are to be solved urgently. Energy conservation, consumption reduction and low carbon emission are objective requirements for social development, and the state pays attention to technical upgrading and transformation of the explosion-proof industry. From the plan of 'eleven five' to the present, the technical development of the explosion-proof industry is changing day by day, and the application of the mining explosion-proof frequency converter is becoming wide.

At present, all electronic equipment has miniaturization requirements, and the mining explosion-proof frequency converter all-in-one machine integrates a traditional frequency converter and a motor, so that the equipment space is greatly saved, an underground chamber is not required to be placed or an equipment train is not occupied, the highest power density is achieved, the occupied space is small, and more safety spaces are reserved for a working face. Meanwhile, the all-in-one machine does not need to be matched with other electric control systems, oil pressure systems and the like, and only needs a power supply and a communication cable. The reduction of volume makes the all-in-one become the first choice of mining trade, and more equipment producers are put into the research and development of all-in-one.

The direct current supporting capacitor used in the conventional mine explosion-proof frequency converter is a thin film capacitor, but the direct current supporting capacitor used in the conventional mine explosion-proof frequency converter is generally used in a mode that a plurality of conventional circular aluminum shell capacitors are stacked on the capacitors and are connected in series and in parallel, is large in size, heavy in mass and large in occupied space, and is obviously not suitable for an all-in-one machine with compact size and space.

Disclosure of Invention

In order to solve current conventional electric capacity bulky, withstand voltage, overcurrent ability are poor, and the electric capacity problem that the life-span is low that generates heat easily, the utility model provides a mining explosion-proof frequency conversion is direct current support capacitor for all-in-one, its is small, has improved withstand voltage and overcurrent ability, reduces electric capacity and generates heat increase of service life.

The technical scheme is as follows: a DC supporting capacitor for a mining explosion-proof frequency conversion all-in-one machine comprises a shell, wherein a capacitor core and an encapsulation material are arranged in the shell, and a leading-out end connected with the capacitor core is installed on the shell, and is characterized in that the leading-out end comprises a leading-out electrode and a composite copper bar, the composite copper bar comprises an upper copper bar arranged on the upper surface of a middle insulating plate and a lower copper bar arranged on the lower surface of the middle insulating plate, the leading-out electrodes with different polarities are respectively connected with the upper copper bar and the lower copper bar, the capacitor core comprises a first core group and a second core group, a first connecting copper plate and a second connecting copper plate are respectively arranged on the first core group and the second core group, the end part of the first connecting copper plate is connected with the upper copper bar, the second connecting copper plate is connected with the lower copper bar, and the capacitor core is formed by winding a metalized film, and a metal coating is arranged on the metallized film.

The copper bar is further characterized in that the three extraction electrodes are arranged side by side, the upper surface of the middle insulating plate is provided with two spaced upper-layer copper bars, the two extraction electrodes at two sides are respectively connected with the upper-layer copper bars, and the extraction electrode in the middle penetrates through the middle insulating plate to be connected with the lower-layer copper bars;

the first connecting copper plates are arranged on the front side and the rear side of the first core set and the front side and the rear side of the second core set, first bending parts are arranged at the end parts of the first connecting copper plates, the first bending parts are positioned above the middle insulating plate and welded with the upper copper bar, the second connecting copper plates are arranged on the left side and the right side of the first core set and the left side and the right side of the second core set, second bending parts are arranged at the end parts of the second connecting copper plates, and the second bending parts are positioned below the middle insulating plate and welded with the lower copper bar;

the capacitor core is formed by winding a metallized polypropylene film and comprises a capacitor pole plate and a polypropylene film medium, wherein the capacitor pole plate is an aluminum coating evaporated by the polypropylene film medium.

Adopt the utility model discloses afterwards, with two capacitor core integrations in a casing to female integrated structure as an organic whole of arranging by the stromatolite, the volume that has significantly reduced, metallized film can improve withstand voltage ability and overcurrent ability around the capacitor core that the book formed, reduces electric capacity and generates heat, improves life, and the volume further reduces.

Drawings

FIG. 1 is a schematic diagram of a conventional single capacitor structure;

FIG. 2 is a schematic diagram of a conventional capacitor assembly structure;

fig. 3 is a schematic diagram of the capacitor structure of the present invention;

fig. 4 is a schematic diagram of the internal structure of the capacitor of the present invention;

FIG. 5 is a schematic diagram of the capacitor core structure of the present invention;

fig. 6 is a schematic perspective view of the capacitor terminal composite copper bar of the present invention;

fig. 7 is a schematic front view of the capacitor terminal composite copper bar of the present invention;

fig. 8 is a schematic structural view of the capacitor core set of the present invention;

fig. 9 is an equivalent circuit diagram of the capacitor of the present invention.

Detailed Description

Referring to fig. 3 to 8, a dc support capacitor for a mining explosion-proof frequency conversion all-in-one machine comprises a housing 1, the material of which may be plastic or metal material (aluminum, copper or stainless steel), a capacitor core 4 and a potting material 3 are arranged in the housing 1, the potting material 3 fills the inner cavity of the housing 1, a leading-out terminal connected with the capacitor core 4 is installed on the housing 1, the leading-out terminal comprises a leading-out electrode 6 and a composite copper bar 2, the composite copper bar 2 comprises an upper copper bar 21 arranged on the upper surface of a middle insulating plate 23 and a lower copper bar 22 arranged on the lower surface of the middle insulating plate 23, leading-out electrodes with different polarities are respectively connected with the upper copper bar 21 and the lower copper bar 22, the capacitor core 4 comprises a first core group 41 and a second core group 42, a first connecting copper plate 51 and a second connecting copper plate 52 are respectively arranged on the first core group 41 and the second core group 42, the end of the, the second connecting copper plate 52 is connected with the lower copper bar 22, and the capacitor core 4 is formed by winding a metalized film on which a metal coating is arranged.

In this embodiment, the extraction electrodes specifically include three extraction electrodes arranged side by side, the upper surface of the middle insulation plate 23 is provided with two spaced upper copper bars 21, the two extraction electrodes 61 on the two sides are respectively connected to the upper copper bars 21, and the middle extraction electrode 62 penetrates through the middle insulation plate 23 and is connected to the lower copper bars 22.

First connection copper 51 sets up in both sides around first core group 41 and both sides around second core group 42, first connection copper 41 tip is provided with first bending portion, first bending portion is located middle insulation board 23 top and welds with upper copper bar 21, second connection copper 52 sets up in the first core group 41 left and right sides and the second core group 42 left and right sides, second connection copper 52 tip is provided with the second bending portion, the second bending portion is located middle insulation board 23 below and welds with lower copper bar 22.

The capacitor core is formed by winding a metallized polypropylene film and comprises a capacitor pole plate and a polypropylene film medium, wherein the capacitor pole plate is an aluminum coating evaporated by the polypropylene film medium, and a zinc thickening edge area is arranged at the edge of the film coating during evaporation.

The utility model discloses an electric capacity has still adopted the flattening design, reduces the electric capacity volume in the at utmost.

Claims

1. A DC supporting capacitor for a mining explosion-proof frequency conversion all-in-one machine comprises a shell, wherein a capacitor core and an encapsulation material are arranged in the shell, and a leading-out end connected with the capacitor core is installed on the shell, and is characterized in that the leading-out end comprises a leading-out electrode and a composite copper bar, the composite copper bar comprises an upper copper bar arranged on the upper surface of a middle insulation board and a lower copper bar arranged on the lower surface of the middle insulation board, the leading-out electrodes with different polarities are respectively connected with the upper copper bar and the lower copper bar, the capacitor core comprises a first core group and a second core group, a first connecting copper plate and a second connecting copper plate are respectively arranged on the first core group and the second core group, the end part of the first connecting copper plate is connected with the upper copper bar, the second connecting copper plate is connected with the lower copper bar, and the capacitor core is formed by winding a metalized film, and a metal coating is arranged on the metallized film.

2. The direct-current supporting capacitor for the mining explosion-proof frequency conversion all-in-one machine according to claim 1, wherein the number of the leading-out electrodes is three, the three leading-out electrodes are arranged side by side, the upper surface of the middle insulating plate is provided with two spaced upper copper bars, the two leading-out electrodes on two sides are respectively connected with the upper copper bars, and the leading-out electrode in the middle penetrates through the middle insulating plate to be connected with the lower copper bars.

3. The DC support capacitor for the mining explosion-proof frequency conversion all-in-one machine as claimed in claim 2, wherein the first connection copper plate is arranged on the front and back sides of the first core set and the front and back sides of the second core set, the end part of the first connection copper plate is provided with a first bending part, the first bending part is arranged above the middle insulation plate and welded with the upper copper bar, the second connection copper plate is arranged on the left and right sides of the first core set and the left and right sides of the second core set, the end part of the second connection copper plate is provided with a second bending part, and the second bending part is arranged below the middle insulation plate and welded with the lower copper bar.

4. The direct-current supporting capacitor for the mining explosion-proof frequency conversion all-in-one machine as claimed in claim 1, wherein the capacitor core is formed by winding a metallized polypropylene film and comprises a capacitor plate and a polypropylene film medium, and the capacitor plate is an aluminum coating evaporated by the polypropylene film medium.