CN108768138B - Frequency converter laminated busbar assembly - Google Patents
Frequency converter laminated busbar assembly Download PDFInfo
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- CN108768138B CN108768138B CN201810757906.6A CN201810757906A CN108768138B CN 108768138 B CN108768138 B CN 108768138B CN 201810757906 A CN201810757906 A CN 201810757906A CN 108768138 B CN108768138 B CN 108768138B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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Abstract
The invention discloses a laminated busbar assembly of a frequency converter, which comprises the following components: the electrolytic capacitor comprises an electrolytic capacitor fixing plate, a plurality of electrolytic capacitors, a first middle busbar, a second middle busbar, an insulating part, a top busbar, a plurality of first voltage equalizing resistors, a plurality of second voltage equalizing resistors, two third voltage equalizing resistors and a plurality of fourth voltage equalizing resistors, wherein the bottoms of the electrolytic capacitors are fixed on the electrolytic capacitor fixing plate, the insulating part is arranged on the first middle busbar and the second middle busbar. According to the invention, all electrolytic capacitors are reasonably arranged, the middle busbar is divided into two pieces, and a plurality of reasonable avoiding holes are combined, so that the frequency converter laminated busbar assembly has the advantages of simple structure, low cost and high reliability.
Description
Technical Field
The invention relates to the technical field of frequency converters, in particular to a laminated busbar assembly of a frequency converter.
Background
The laminated busbar of the high-power frequency converter in 380V in the current market, particularly the busbar structure of the laminated busbar of which the electrolytic capacitors are arranged in 3 rows, is very complex, and the cost of parts is greatly increased; or the unreasonable and great influence of busbar structural design on the reliability of the frequency converter.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the frequency converter laminated busbar assembly which has a simple structure, low cost and high reliability, aiming at the defects existing in the laminated busbar of the high-power frequency converter in 380V in the existing market.
The technical problems to be solved by the invention can be realized by the following technical scheme:
a frequency converter laminated busbar assembly comprising:
an electrolytic capacitor fixing plate;
a plurality of electrolytic capacitors with bottoms fixed on the electrolytic capacitor fixing plate; the electrolytic capacitors are arranged in three rows, wherein a first row and a third row are positioned at the outermost side, a second row is positioned between the first row and the third row, and a first connecting terminal and a second connecting terminal are arranged on the top of each electrolytic capacitor;
the middle busbar is divided into a first middle busbar and a second middle busbar, wherein the first middle busbar is provided with a plurality of first screw holes aligned with the second wiring terminals on the first row of electrolytic capacitors, a plurality of second screw holes aligned with the first wiring terminals on the third row of electrolytic capacitors, a plurality of third screw holes aligned with the second wiring terminals on the second row of middle electrolytic capacitors, two fourth screw holes aligned with the first wiring terminals on the two outermost electrolytic capacitors of the second row, and a plurality of first avoidance holes for avoiding the first wiring terminals on the second row of middle electrolytic capacitors; the second middle busbar is provided with a plurality of fifth screw holes aligned with the second wiring terminals on the third row of electrolytic capacitors and two sixth screw holes aligned with the second wiring terminals on the two electrolytic capacitors at the outermost end of the second row, and the second middle busbar is also provided with two seventh screw holes connected with an external input copper piece; a plurality of first connecting lugs connected with the IGBT module are arranged at intervals on one side of the second middle busbar far away from the first middle busbar;
the insulating piece is provided with a plurality of eighth screw holes aligned with a plurality of first screw holes on the first middle busbar, a plurality of ninth screw holes aligned with a plurality of second screw holes on the first middle busbar, a plurality of tenth screw holes aligned with a plurality of third screw holes on the first middle busbar, two eleventh screw holes aligned with two fourth screw holes on the first middle busbar, a plurality of second avoidance holes aligned with a first avoidance hole on the first middle busbar, a plurality of twelfth screw holes aligned with a plurality of fifth screw holes on the second middle busbar, two thirteenth screw holes aligned with two sixth screw holes on the second middle busbar and one third avoidance hole, and a plurality of seventh screw holes connected with an external input copper piece on the second middle busbar fall into the third avoidance hole;
a top busbar, on which are arranged a plurality of fourteenth screw holes aligned with first connecting terminals on the first row of electrolytic capacitors, a plurality of large round holes aligned with eighth screw holes on the insulating member, a plurality of first waist-shaped holes for respectively containing a second avoiding hole and a twelfth screw hole on the insulating member, two second waist-shaped holes for respectively containing an eleventh screw hole and a thirteenth screw hole on the insulating member, a plurality of third waist-shaped holes for containing a ninth screw hole and a twelfth screw hole on the insulating member, a fourth avoiding hole aligned with the third avoiding hole on the insulating member, a step lug aligned with the second avoiding hole contained in the first waist-shaped holes is arranged on the hole edge of each first waist-shaped hole, and fifteen screw holes aligned with the first terminals on the electrolytic capacitors in the middle of the second row are arranged on each step lug; a plurality of second connecting lugs connected with the IGBT module are arranged on the side, opposite to the side provided with the fourteenth screw hole, of the top busbar; each second connection lug is aligned with a first connection lug and is simultaneously electrically connected with one IGBT module;
the first connecting piece and the second connecting piece are respectively arranged at two ends of each first voltage equalizing resistor, a sixteenth screw hole and a seventeenth screw hole are respectively arranged on the first connecting piece and the second connecting piece, a first screw sequentially penetrates through the sixteenth screw hole and the fourteenth screw hole and then is screwed into a first wiring terminal on one electrolytic capacitor in the first row of electrolytic capacitors, so that the top busbar is electrically and parallelly connected with the first wiring terminals on all electrolytic capacitors in the first row of electrolytic capacitors; a second screw sequentially passes through a seventeenth screw hole, a large round hole, an eighth screw hole and a first screw hole and then is screwed into a second wiring terminal on one electrolytic capacitor in the first row of electrolytic capacitors, so that the first middle busbar is electrically connected with the second wiring terminals on all electrolytic capacitors in the first row of electrolytic capacitors in parallel;
the first connecting terminals on all electrolytic capacitors in the middle of the second row are electrically connected in parallel, and the second connecting terminals on all electrolytic capacitors in the middle of the first middle row are electrically connected in parallel by sequentially penetrating through a first waist-shaped hole, a tenth screw hole and a third screw hole;
the two ends of each third equalizing resistor are respectively provided with a fifth connecting piece and a sixth connecting piece, a nineteenth screw hole and a twentieth screw hole are respectively arranged on the fifth connecting piece and the sixth connecting piece, a fifth screw sequentially penetrates through a second kidney-shaped hole, a nineteenth screw hole, an eleventh screw hole and a fourth screw hole and then is screwed into a first connecting terminal on each electrolytic capacitor at the outermost end of the second row, so that the first middle busbar is electrically and parallelly connected with the first connecting terminals on the two electrolytic capacitors at the outermost end of the second row; a sixth screw sequentially penetrates through a second kidney-shaped hole, a twentieth screw hole, a twelfth screw hole and a fifth screw hole and then is screwed into a second wiring terminal on each electrolytic capacitor at the outermost end of the second row, so that the second middle busbar is electrically connected with the second wiring terminals on the two electrolytic capacitors at the outermost end of the second row in parallel;
a seventh connecting piece and an eighth connecting piece are respectively arranged at two ends of each fourth voltage-sharing resistor, a twenty-first screw hole and a twenty-second screw hole are respectively arranged on the seventh connecting piece and the eighth connecting piece, a seventh screw sequentially penetrates through a third kidney-shaped hole, the twenty-first screw hole, the ninth screw hole and the second screw hole and then is screwed into the first wiring terminals on all electrolytic capacitors of the third row, so that the first middle busbar is electrically connected in parallel with the first wiring terminals on all electrolytic capacitors of the third row; an eighth screw sequentially passes through a third kidney-shaped hole, a twenty-second screw hole, a twelfth screw hole and a fifth screw hole and then is screwed into the second wiring terminals on all electrolytic capacitors in the third row, so that the second middle busbar is electrically connected with the second wiring terminals on all electrolytic capacitors in the third row in parallel.
In a preferred embodiment of the invention, the number of electrolytic capacitors of the first row is the same as the number of electrolytic capacitors of the third row, and the number of electrolytic capacitors of the second row is one less than the number of electrolytic capacitors of both the first row and the third row; each electrolytic capacitor in the second row is equal to the two electrolytic capacitors in the first row and the two electrolytic capacitors in the third row which are closest to the electrolytic capacitors in the first row;
in a preferred embodiment of the invention, a sunken step is provided on the side of the top busbar adjacent to the first row of electrolytic capacitors, and all fourteenth screw holes are arranged on the step at intervals.
In a preferred embodiment of the present invention, two cantilevers are provided at a side of the second intermediate busbar adjacent to the first intermediate busbar, two sixth screw holes are provided on one cantilever, respectively, and an opening notch is provided at a position corresponding to the two cantilevers at a side of the first intermediate busbar adjacent to the second intermediate busbar, respectively, and each cantilever extends into the corresponding opening notch.
In a preferred embodiment of the invention, two binding posts connected with an external input copper piece are arranged on the top-layer busbar, and the two binding posts are matched with two seventh screw holes on the second middle busbar to be electrically connected with the external input copper piece.
In a preferred embodiment of the present invention, the first avoidance hole, the second avoidance hole, the third avoidance hole, and the fourth avoidance hole are square holes.
In a preferred embodiment of the invention, a stud is arranged at the bottom of each electrolytic capacitor, the electrolytic capacitor fixing plate is provided with through holes the number of which is the same as that of the electrolytic capacitors, and after each stud passes through the corresponding through hole and is screwed with a nut, all the electrolytic capacitors are fixedly connected with the electrolytic capacitor fixing plate.
By adopting the technical scheme, all electrolytic capacitors are reasonably arranged, the middle busbar is divided into two blocks, and a plurality of reasonable avoidance holes are combined, so that the frequency converter laminated busbar assembly has the advantages of simple structure, low cost and high reliability.
Drawings
Fig. 1 is an exploded schematic view of a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors according to the present invention.
Fig. 2 is a schematic structural diagram of an electrolytic capacitor fixing plate in a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors.
Fig. 3 is a schematic diagram of electrolytic capacitor arrangement in a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors according to the present invention.
Fig. 4 is a schematic structural diagram of a first middle busbar in a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors according to the present invention.
Fig. 5 is a schematic structural diagram of a second middle busbar in the stacked busbar assembly of the frequency converter with 14 electrolytic capacitors according to the present invention.
Fig. 6 is a schematic structural diagram of an insulating member in a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors according to the present invention.
Fig. 7 is a schematic structural diagram of a top busbar in a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors according to the present invention.
Fig. 8 is an assembly schematic diagram of a stacked busbar assembly of a frequency converter with 14 electrolytic capacitors according to the present invention.
Detailed Description
The invention will be described in detail below with reference to the accompanying drawings, taking a stacked busbar assembly of frequency converters with 14 electrolytic capacitors as an example.
Referring to fig. 1, a stacked busbar assembly for a frequency converter is shown, which includes an electrolytic capacitor fixing plate 100, 14 electrolytic capacitors 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235, a middle busbar, an insulating member 500, and a top busbar 600.
The electrolytic capacitor fixing plate 100 is made of insulating materials, a flange 140 is arranged on the periphery of the electrolytic capacitor fixing plate 100, and fourteen through holes 111, 112, 113, 114, 115, 121, 122, 123, 124, 131, 132, 133, 134 and 135 are formed in the electrolytic capacitor fixing plate 100; fourteen through holes 111, 112, 113, 114, 115, 121, 122, 123, 124, 131, 132, 133, 134, 135 are arranged in three rows, wherein five through holes 111, 112, 113, 114, 115 are arranged in a row, which is the first row; four through holes 121, 122, 123, 124 are arranged in a row, being a second row; five through holes 131, 132, 133, 134, 135 are arranged in a row, and are a third row, and the second row of through holes 121, 122, 123, 124 are positioned between the first row of through holes 111, 112, 113, 114, 115 and the third row of through holes 131, 132, 133, 134, 135, and the distances from the through holes 121 on the second row to the through holes 111, 112 in the first row and the through holes 311, 112 in the third row are equal; the distance from the through holes 122 in the second row to the through holes 112, 113 in the first row and the through holes 312, 313 in the third row is equal; the distance from the through holes 123 in the second row to the through holes 113, 113 in the first row and the through holes 313, 314 in the third row is equal; the through holes 124 in the second row are equidistant from the through holes 114, 115 in the first row and the through holes 314, 315 in the third row.
The inner diameter of each through hole 111, 112, 113, 114, 115, 121, 122, 123, 124, 131, 132, 133, 134, 135 should be smaller than the outer diameter of each electrolytic capacitor 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235.
Referring to fig. 1, a stud a is disposed at the bottom of each electrolytic capacitor 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235, and the studs a at the bottoms of the fourteen electrolytic capacitors 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235 respectively pass through a through hole 111, 112, 113, 114, 115, 121, 122, 123, 124, 131, 132, 133, 134, 135 on the electrolytic capacitor fixing plate 100, and then fourteen nuts B are screwed and tightened, so that the fourteen electrolytic capacitors 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235 are fixedly mounted on the electrolytic capacitor fixing plate 100.
Referring to fig. 3, after fourteen electrolytic capacitors 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235 are fixedly mounted on the electrolytic capacitor fixing plate 100, the fourteen electrolytic capacitors 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235 are arranged in three rows, wherein the five electrolytic capacitors 211, 212, 213, 214, 215 are arranged in a row to be the first row of electrolytic capacitors; the four electrolytic capacitors 221, 222, 223, 224 are arranged in a row and are the second row of electrolytic capacitors; five electrolytic capacitors 231, 232, 233, 234, 235 are arranged in a row, namely a third row of electrolytic capacitors, the second row of electrolytic capacitors 221, 222, 223, 224 are positioned between the first row of electrolytic capacitors 211, 212, 213, 214, 215 and the third row of electrolytic capacitors 231, 232, 233, 234, 235, and the distances from the electrolytic capacitor 221 on the second row to the electrolytic capacitors 211, 212 in the first row and the electrolytic capacitors 231, 232 in the third row are equal; the electrolytic capacitors 222 in the second row are equidistant from the electrolytic capacitors 212, 213 in the first row and the electrolytic capacitors 232, 233 in the third row; the electrolytic capacitors 223 in the second row are equidistant from the electrolytic capacitors 213, 214 in the first row and the electrolytic capacitors 233, 234 in the third row; the electrolytic capacitors 224 in the second row are equidistant from the electrolytic capacitors 214, 215 in the first row and the electrolytic capacitors 234, 235 in the third row.
The top of each electrolytic capacitor 211, 212, 213, 214, 215, 221, 222, 223, 224, 231, 232, 233, 234, 235 is provided with a first connection terminal 211a, 212a, 213a, 214a, 215a, 221a, 222a, 223a, 224a, 231a, 232a, 233a, 234a, 235a and a second connection terminal 211b, 212b, 213b, 214b, 215b, 221b, 222b, 223b, 224b, 231b, 232b, 233b, 234b, 235b.
The intermediate busbar is divided into a first intermediate busbar 410 and a second intermediate busbar 420, and the first intermediate busbar 410 and the second intermediate busbar 420 are each made of a conductive material such as a copper plate. Referring to fig. 4, fourteen screw holes 411a, 412a, 413a, 414a, 415a, 411b, 412b, 413b, 414b, 411c, 412c, 413c, 414c, 415c and two avoidance holes 416a, 416b are formed in the first middle busbar 410, wherein the five screw holes 411a, 412a, 413a, 414a, 415a are in one-to-one correspondence with and aligned with the positions of the second connection terminals 211b, 212b, 213b, 214b, 215b on the electrolytic capacitors 211, 212, 213, 214, 215; screw hole 411b is aligned with first connection terminal 221a on electrolytic capacitor 221; the relief hole 416a is aligned with a first terminal 222a on the electrolytic capacitor 222; the escape hole 416b is aligned with the first connection terminal 223a on the electrolytic capacitor 223; screw hole 414b is aligned with first connection terminal 224a on electrolytic capacitor 224; screw hole 412b is aligned with a second connection terminal 222b on electrolytic capacitor 222; screw hole 413b is aligned with second connection terminal 223b on electrolytic capacitor 223; the five screw holes 411c, 412c, 413c, 414c, 415c are aligned in one-to-one correspondence with the positions of the first connection terminals 231a, 232a, 233a, 234a, 235a on the electrolytic capacitors 231, 232, 233, 234, 235.
Referring to fig. 5, nine screw holes 421b, 424b, 421c, 422c, 423c, 424c, 425c, 426a, 426b are formed in the second middle busbar 420, wherein the screw holes 421b are aligned with the second connection terminal 221b on the electrolytic capacitor 221, the screw holes 424b are aligned with the second connection terminal 224b on the electrolytic capacitor 224, and the screw holes 421c, 422c, 423c, 424c, 425c are aligned with the second connection terminals 231b, 232b, 233b, 234b, 235b on the electrolytic capacitors 231, 232, 233, 234, 235b in a one-to-one correspondence. Screw holes 426a, 426b are used to connect with external input copper pieces.
In order to shorten the distance between the first middle busbar 410 and the second middle busbar 420, two cantilever arms 427a, 427b are provided at one side of the second middle busbar 420 adjacent to the first middle busbar 410, screw holes 421b, 424b are provided on one cantilever arm 427a, 427b, respectively, an opening slot 417a, 417b is provided at one side of the first middle busbar 410 adjacent to the second middle busbar 420 corresponding to the two cantilever arms 427a, 427b, respectively, and each cantilever arm 427a, 427b extends into the corresponding opening slot 417a, 417 b.
In addition, in order to connect with the IGBT module, six first connection lugs 428a, 428b, 428c, 428d, 428e connected with the IGBT module are disposed at intervals on the side of the second intermediate busbar 420 remote from the first intermediate busbar 410, and a screw hole is also formed in each of the first connection lugs 428a, 428b, 428c, 428d, 418 e.
Referring to fig. 6, the insulating member 500 is a flat plate structure, on which twenty-one screw holes 511b, 512b, 513b, 514b, 515b, 521a, 524a, 521b, 522b, 523b, 524b, 531a, 532a, 533a, 534a, 531b, 532b, 533b, 534b, 535b and three avoidance holes 522a, 523a, 541 are formed, wherein the five screw holes 511b, 512b, 513b, 514b, 515b are aligned with the positions of the five screw holes 411a, 412a, 413a, 414a, 415a on the first middle busbar 410 in a one-to-one correspondence; screw hole 521a is aligned with screw hole 411b on first intermediate busbar 410; the relief aperture 522a is aligned with the relief aperture 416a on the first intermediate busbar 410; the relief holes 523a are aligned with the relief holes 416b on the first intermediate busbar 410; screw hole 524a is aligned with screw hole 414b on first intermediate busbar 410; the five screw holes 531a, 532a, 533a, 534a, 535a are aligned in one-to-one correspondence with the positions of the five screw holes 411c, 412c, 413c, 414c, 415c on the first middle busbar 410; the five screw holes 531b, 532b, 533b, 534b, 535b are aligned in one-to-one correspondence with the positions of the five screw holes 421c, 422c, 423c, 424c, 425c on the second middle busbar 420; the relief holes 541 are configured to accommodate the 426a, 426b on the second intermediate busbar 420.
Referring to fig. 7, five screw holes 611a, 612a, 613a, 614a, 615a, five large round holes 611b, 612b, 613b, 614b, 615b, nine kidney- shaped holes 620a, 620b, 620c, 620d, 630a, 630b, 630c, 630d, 630e, and one escape hole 640 are provided in the top busbar 600, and two binding posts 651a, 652a are further fixed to the top busbar 600.
In order to be better electrically connected with the first wiring terminals 211a, 212a, 213a, 214a, 215a of the electrolytic capacitors 211, 212, 213, 214, 215, a sunken step 610 is arranged on the side, adjacent to the first row of electrolytic capacitors 211, 212, 213, 214, 215, of the top busbar 600, five screw holes 611a, 612a, 613a, 614a, 615a are arranged on the step 610 at intervals, and the five screw holes 611a, 612a, 613a, 614a, 615 are in one-to-one correspondence with and aligned with the positions of the first wiring terminals 211a, 212a, 213a, 214a, 215a on the electrolytic capacitors 211, 212, 213, 214, 215. Six second connection lugs 661a, 662a, 663a, 664a, 665a, 666a connected to the IGBT module are provided on the side of the top busbar 600 opposite to the side on which the step 610 is provided. A screw hole is also formed in each of the second connecting lugs 661a, 662a, 663a, 664a, 665a, 666a.
The five large circular holes 611b, 612b, 613b, 614b, 615b are aligned in one-to-one correspondence with the positions of the five screw holes 511b, 512b, 513b, 514b, 515b on the insulator 500.
Kidney-shaped hole 620a is configured to receive screw holes 521a, 521b on insulator 500, kidney-shaped hole 620b is configured to receive relief hole 522a and screw hole 522b on insulator 500, kidney-shaped hole 620c is configured to receive relief hole 523a and screw hole 523b on insulator 500, kidney-shaped hole 620d is configured to receive screw holes 524a, 524b on insulator 500, kidney-shaped hole 630a is configured to receive screw holes 531a, 531b on insulator 500, kidney-shaped hole 630b is configured to receive screw holes 532a, 532b on insulator 500, kidney-shaped hole 630c is configured to receive screw holes 533a, 533b on insulator 500, kidney-shaped hole 630d is configured to receive screw holes 534a, 534b on insulator 500, and kidney-shaped hole 630e is configured to receive screw holes 535a, 535b on insulator 500. The relief holes 640 are aligned with the relief holes 541 in the insulator 500.
A stepped boss 621b aligned with the escape hole 522a accommodated in the kidney-shaped hole 620b is provided at the hole edge of the kidney-shaped hole 620b, and a screw hole 622b aligned with the first connection terminal 222a of one electrolytic capacitor 222 in the middle of the second row is provided at the stepped boss 621 b.
A stepped boss 621c aligned with the escape hole 523a accommodated in the kidney-shaped hole 620b is provided at the hole edge of the kidney-shaped hole 620c, and a screw hole 622c aligned with the first connection terminal 223a of one electrolytic capacitor 223 in the middle of the second row is provided at the stepped boss 621 c.
The converter laminated busbar assembly of this particular embodiment further includes five first transition resistances 711, 712, 713, 714, 715, two second transition resistances 722, 723, two third transition resistances 721, 724, and five fourth transition resistances 731, 732, 733, 734, 735; the five first transition resistances 711, 712, 713, 714, 715, the two second transition resistances 722, 723, the two third transition resistances 721, 724, and the five fourth transition resistances 731, 732, 733, 734, 735 are each provided with a connection piece 711a, 711b, 712a, 712b, 713a, 713b, 714a, 714b, 715a, 715b, 722a, 722b, 723a, 723b, 721a, 721b, 724a, 724b, 731a, 731b, 732a, 732b, 733a, 733b, 734a, 734b, 735a, 735b at both ends, a screw hole 711c, 711d, 712c, 712d, 713c, 713d, 714c, 714d, 715c, 715d, 722c, 722d, 731c, 731d, 732c, 732d, 733c, 733d, 734c, 734d, 735c, 735d is formed in each of the connection pieces 711a, 711b, 712a, 712b, 713a, 715a, 714b, 713a, 713b, 715c, 722d, 723c, 723d, 721c, 721d, 724c, 724d, 731c, 731d, 732c, 732d, 733c, 733d, 734c, 734d, 735c, 735d.
In the concrete installation, one screw 811a sequentially passes through the screw hole 711c and the screw hole 611a and then is screwed into the first wiring terminal 211a of the electrolytic capacitor 211 and is screwed, and one screw 811b sequentially passes through the large round hole 611b, the screw hole 711d, the screw hole 511b and the screw hole 411a and then is screwed into the second wiring terminal 211b of the electrolytic capacitor 211 and is screwed; a screw 812a sequentially passes through the screw hole 712c and the screw hole 612a and then is screwed into the first wiring terminal 212a of the electrolytic capacitor 212 and is screwed, and a screw 812b sequentially passes through the large round hole 612b, the screw hole 712d, the screw hole 512b and the screw hole 412a and then is screwed into the second wiring terminal 212b of the electrolytic capacitor 212 and is screwed; a screw 813a sequentially passes through the screw hole 713c and the screw hole 613a and then is screwed into the first connecting terminal 213a of the electrolytic capacitor 213 and is screwed, and a screw 813b sequentially passes through the large round hole 613b, the screw hole 713d, the screw hole 513b and the screw hole 413a and then is screwed into the second connecting terminal 213b of the electrolytic capacitor 213 and is screwed; a screw 814a is screwed into the first connecting terminal 214a of the electrolytic capacitor 214 after passing through the screw hole 714c and the screw hole 614a in sequence, and a screw 814b is screwed into the second connecting terminal 214b of the electrolytic capacitor 214 after passing through the large round hole 614b, the screw hole 714d, the screw hole 514b and the screw hole 414a in sequence; a screw 815a is screwed into the first connecting terminal 215a of the electrolytic capacitor 215 after passing through the screw hole 715c and the screw hole 615a in sequence, and a screw 815b is screwed into the second connecting terminal 215b of the electrolytic capacitor 215 after passing through the large round hole 615b, the screw hole 715d, the screw hole 515b and the screw hole 415a in sequence. The top busbar 600 is electrically connected in parallel with the first connection terminals 211a, 212a, 213a, 214a, 215a on all electrolytic capacitors 211, 212, 213, 214, 215 in the first row, and the first middle busbar 410 is electrically connected in parallel with the second connection terminals 211b, 212b, 213b, 214b, 215b on all electrolytic capacitors 211, 212, 213, 214, 215 in the first row.
One screw 821a is screwed into the first connection terminal 221a of the electrolytic capacitor 221 after passing through the screw hole 721c, the kidney-shaped hole 620a, the screw hole 521a, and the screw hole 411b in order, and is screwed into the second connection terminal 221b of the electrolytic capacitor 221 after passing through the screw hole 721d, the kidney-shaped hole 620a, the screw hole 521b, and the screw hole 421b in order, and is screwed. One screw 822a sequentially passes through the screw hole 722c, the kidney-shaped hole 620b, the screw hole 622b, the avoidance hole 522a and the avoidance hole 416a, and then is screwed into the first wiring terminal 222a of the electrolytic capacitor 222 and is screwed, and one screw 822b sequentially passes through the screw hole 722d, the kidney-shaped hole 620b, the screw hole 522b and the screw hole 412b and then is screwed into the second wiring terminal 222b of the electrolytic capacitor 222 and is screwed. The first connection terminal 223a of the electrolytic capacitor 223 is screwed into the second connection terminal 223b of the electrolytic capacitor 223 and tightened by one screw 823a sequentially passing through the screw hole 723c, the kidney-shaped hole 620c, the screw hole 622c, the avoiding hole 523a and the avoiding hole 416b, and the second connection terminal 223b is screwed into the second connection terminal 223b of the electrolytic capacitor 223 by one screw 823b sequentially passing through the screw hole 723d, the kidney-shaped hole 620c, the screw hole 523b and the screw hole 413 b. One screw 824a is screwed into the first connection terminal 224a of the electrolytic capacitor 224 after passing through the screw hole 724c, the kidney-shaped hole 620d, the screw hole 524a, and the screw hole 414b in order, and is screwed into the second connection terminal 224b of the electrolytic capacitor 224 after passing through the screw hole 724d, the kidney-shaped hole 620d, the screw hole 524b, and the screw hole 424b in order, and is screwed. The top busbar 600 is electrically connected in parallel with the first connection terminals 222a, 223a on the electrolytic capacitors 222, 223 in the second row and the first intermediate busbar 410 is electrically connected in parallel with the first connection terminals 221a, 224a on the electrolytic capacitors 221, 224 in the second row, the first intermediate busbar 410 is electrically connected in parallel with the second connection terminals 223b, 223b on the electrolytic capacitors 222, 223 in the second row and the second intermediate busbar 420 is electrically connected in parallel with the second connection terminals 221b, 224b on the electrolytic capacitors 221, 224 in the second row.
One screw 831a is screwed into the first connection terminal 231a of the electrolytic capacitor 231 after passing through the screw hole 731c, the kidney-shaped hole 630a, the screw hole 531a, and the screw hole 411c in this order, and is screwed into the second connection terminal 231b of the electrolytic capacitor 231 after passing through the screw hole 731d, the kidney-shaped hole 630a, the screw hole 531b, and the screw hole 421c in this order, and is screwed into the first connection terminal. One screw 832a is screwed into the first connection terminal 232a of the electrolytic capacitor 232 after passing through the screw hole 732c, the kidney-shaped hole 630b, the screw hole 532a, and the screw hole 412c in order, and is screwed into the second connection terminal 232b of the electrolytic capacitor 232 after passing through the screw hole 731d, the kidney-shaped hole 630b, the screw hole 532b, and the screw hole 422c in order, and is screwed. A screw 833a is screwed into the first connection terminal 233a of the electrolytic capacitor 233 after passing through the screw hole 733c, the kidney-shaped hole 630c, the screw hole 533a, and the screw hole 413c in this order, and is screwed into the second connection terminal 233b of the electrolytic capacitor 233 after passing through the screw hole 733d, the kidney-shaped hole 630c, the screw hole 533b, and the screw hole 423c in this order, and is screwed. One screw 834a is screwed into the first connection terminal 234a of the electrolytic capacitor 234 after passing through the screw hole 734c, the kidney-shaped hole 630d, the screw hole 534a, and the screw hole 414c in this order, and is screwed into the second connection terminal 234b of the electrolytic capacitor 234 after passing through the screw hole 734d, the kidney-shaped hole 630d, the screw hole 534b, and the screw hole 424c in this order, and is screwed. One screw 835a is screwed into the first connection terminal 235a of the electrolytic capacitor 235 after passing through the screw hole 735c, the kidney-shaped hole 630e, the screw hole 535a, and the screw hole 415c in this order, and is screwed into the second connection terminal 235b of the electrolytic capacitor 235 after passing through the screw hole 735d, the kidney-shaped hole 630e, the screw hole 535b, and the screw hole 425c in this order, and is screwed. The first intermediate busbar 410 is electrically connected in parallel with the first connection terminals 231a, 232a, 233a, 234a, 235a on the electrolytic capacitors 231, 232, 233, 234, 235 in the third row and the second intermediate busbar 420 is electrically connected in parallel with the second connection terminals 231b, 232b, 233b, 234b, 235b on the electrolytic capacitors 231, 232, 233, 234, 235 in the third row.
The second connecting lugs 661a, 662a, 663a, 664a, 665a, 666a on the top busbar 600 are connected to the first connecting lugs 428a, 428b, 428c, 428d, 428e in a one-to-one correspondence, and are then connected to the six IGBT modules, respectively, after being screwed.
The relief holes 416a, 416b, 522a, 523a, 541, 640 are square holes.
Claims (5)
1. A laminated busbar assembly for a frequency converter, comprising:
an electrolytic capacitor fixing plate;
a plurality of electrolytic capacitors with bottoms fixed on the electrolytic capacitor fixing plate; the electrolytic capacitors are arranged in at least three rows, wherein a first row and a third row are positioned at the outermost side, a second row is positioned between the first row and the third row, and a first connecting terminal and a second connecting terminal are arranged on the top of each electrolytic capacitor;
the middle busbar is divided into a first middle busbar and a second middle busbar, wherein the first middle busbar is provided with a plurality of first screw holes aligned with the second wiring terminals on the first row of electrolytic capacitors, a plurality of second screw holes aligned with the first wiring terminals on the third row of electrolytic capacitors, a plurality of third screw holes aligned with the second wiring terminals on the second row of middle electrolytic capacitors, two fourth screw holes aligned with the first wiring terminals on the two outermost electrolytic capacitors of the second row, and a plurality of first avoidance holes for avoiding the first wiring terminals on the second row of middle electrolytic capacitors; the second middle busbar is provided with a plurality of fifth screw holes aligned with the second wiring terminals on the third row of electrolytic capacitors and two sixth screw holes aligned with the second wiring terminals on the two electrolytic capacitors at the outermost end of the second row, and the second middle busbar is also provided with two seventh screw holes connected with an external input copper piece; a plurality of first connecting lugs connected with the IGBT module are arranged at intervals on one side of the second middle busbar far away from the first middle busbar;
the insulating piece is provided with a plurality of eighth screw holes aligned with a plurality of first screw holes on the first middle busbar, a plurality of ninth screw holes aligned with a plurality of second screw holes on the first middle busbar, a plurality of tenth screw holes aligned with a plurality of third screw holes on the first middle busbar, two eleventh screw holes aligned with two fourth screw holes on the first middle busbar, a plurality of second avoidance holes aligned with a first avoidance hole on the first middle busbar, a plurality of twelfth screw holes aligned with a plurality of fifth screw holes on the second middle busbar, two thirteenth screw holes aligned with two sixth screw holes on the second middle busbar and one third avoidance hole, and a plurality of seventh screw holes connected with an external input copper piece on the second middle busbar fall into the third avoidance hole;
a top busbar, on which are arranged a plurality of fourteenth screw holes aligned with first connecting terminals on the first row of electrolytic capacitors, a plurality of large round holes aligned with eighth screw holes on the insulating member, a plurality of first waist-shaped holes for respectively containing a second avoiding hole and a twelfth screw hole on the insulating member, two second waist-shaped holes for respectively containing an eleventh screw hole and a thirteenth screw hole on the insulating member, a plurality of third waist-shaped holes for containing a ninth screw hole and a twelfth screw hole on the insulating member, a fourth avoiding hole aligned with the third avoiding hole on the insulating member, a step lug aligned with the second avoiding hole contained in the first waist-shaped holes is arranged on the hole edge of each first waist-shaped hole, and fifteen screw holes aligned with the first terminals on the electrolytic capacitors in the middle of the second row are arranged on each step lug; a plurality of second connecting lugs connected with the IGBT module are arranged on the side, opposite to the side provided with the fourteenth screw hole, of the top busbar; each second connection lug is aligned with a first connection lug and is simultaneously electrically connected with one IGBT module;
the first connecting piece and the second connecting piece are respectively arranged at two ends of each first voltage equalizing resistor, a sixteenth screw hole and a seventeenth screw hole are respectively arranged on the first connecting piece and the second connecting piece, a first screw sequentially penetrates through the sixteenth screw hole and the fourteenth screw hole and then is screwed into a first wiring terminal on one electrolytic capacitor in the first row of electrolytic capacitors, so that the top busbar is electrically and parallelly connected with the first wiring terminals on all electrolytic capacitors in the first row of electrolytic capacitors; a second screw sequentially passes through a seventeenth screw hole, a large round hole, an eighth screw hole and a first screw hole and then is screwed into a second wiring terminal on one electrolytic capacitor in the first row of electrolytic capacitors, so that the first middle busbar is electrically connected with the second wiring terminals on all electrolytic capacitors in the first row of electrolytic capacitors in parallel;
the first connecting terminals on all electrolytic capacitors in the middle of the second row are electrically connected in parallel, and the second connecting terminals on all electrolytic capacitors in the middle of the first middle row are electrically connected in parallel by sequentially penetrating through a first waist-shaped hole, a tenth screw hole and a third screw hole;
the two ends of each third equalizing resistor are respectively provided with a fifth connecting piece and a sixth connecting piece, a nineteenth screw hole and a twentieth screw hole are respectively arranged on the fifth connecting piece and the sixth connecting piece, a fifth screw sequentially penetrates through a second kidney-shaped hole, a nineteenth screw hole, an eleventh screw hole and a fourth screw hole and then is screwed into a first connecting terminal on each electrolytic capacitor at the outermost end of the second row, so that the first middle busbar is electrically and parallelly connected with the first connecting terminals on the two electrolytic capacitors at the outermost end of the second row; a sixth screw sequentially penetrates through a second kidney-shaped hole, a twentieth screw hole, a twelfth screw hole and a fifth screw hole and then is screwed into a second wiring terminal on each electrolytic capacitor at the outermost end of the second row, so that the second middle busbar is electrically connected with the second wiring terminals on the two electrolytic capacitors at the outermost end of the second row in parallel;
a seventh connecting piece and an eighth connecting piece are respectively arranged at two ends of each fourth voltage-sharing resistor, a twenty-first screw hole and a twenty-second screw hole are respectively arranged on the seventh connecting piece and the eighth connecting piece, a seventh screw sequentially penetrates through a third kidney-shaped hole, the twenty-first screw hole, the ninth screw hole and the second screw hole and then is screwed into the first wiring terminals on all electrolytic capacitors of the third row, so that the first middle busbar is electrically connected in parallel with the first wiring terminals on all electrolytic capacitors of the third row; an eighth screw sequentially passes through a third kidney-shaped hole, a twenty-second screw hole, a twelfth screw hole and a fifth screw hole and then is screwed into second wiring terminals on all electrolytic capacitors in a third row, so that the second middle busbar is electrically connected with the second wiring terminals on all electrolytic capacitors in the third row in parallel;
the number of the electrolytic capacitors in the first row is the same as that of the electrolytic capacitors in the third row, and the number of the electrolytic capacitors in the second row is one less than that of the electrolytic capacitors in the first row and the third row; each electrolytic capacitor in the second row is equal to the two electrolytic capacitors in the first row and the two electrolytic capacitors in the third row which are closest to the electrolytic capacitors in the first row;
the top busbar is provided with a sunk step on one side close to the first row of electrolytic capacitors, and all fourteenth screw holes are arranged on the step at intervals.
2. A stacked busbar assembly for a frequency converter as claimed in claim 1 wherein two cantilever arms are provided on a side of the second intermediate busbar adjacent to the first intermediate busbar, two sixth screw holes are provided on each cantilever arm, and an open slot is provided on a side of the first intermediate busbar adjacent to the second intermediate busbar at a position corresponding to each of the two cantilever arms, each cantilever arm extending into the corresponding open slot.
3. The transducer stack busbar assembly of claim 1, wherein two studs connected to an external input copper member are provided on the top busbar, and wherein the two studs are electrically connected to the external input copper member in cooperation with two seventh screw holes provided on the second intermediate busbar.
4. The transducer stack busbar assembly of claim 1, wherein the first relief hole, the second relief hole, the third relief hole, and the fourth relief hole are square holes.
5. The transducer stack busbar assembly of claim 1, wherein a stud is disposed at the bottom of each electrolytic capacitor, the electrolytic capacitor fixing plates are provided with a number of through holes equal to the number of electrolytic capacitors, and after each stud passes through the corresponding through hole and is screwed with a nut, all electrolytic capacitors are fixedly connected with the electrolytic capacitor fixing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810757906.6A CN108768138B (en) | 2018-07-11 | 2018-07-11 | Frequency converter laminated busbar assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810757906.6A CN108768138B (en) | 2018-07-11 | 2018-07-11 | Frequency converter laminated busbar assembly |
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| CN108768138A CN108768138A (en) | 2018-11-06 |
| CN108768138B true CN108768138B (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (4)
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| CN201436781U (en) * | 2009-02-24 | 2010-04-07 | 上海雷诺尔电气有限公司 | Main structure of frequency conversion speed regulator |
| CN202135072U (en) * | 2011-08-05 | 2012-02-01 | 南京国睿新能电子有限公司 | Inverted power supply main circuit unit device with module parallelly connected |
| CN202488145U (en) * | 2012-01-17 | 2012-10-10 | 上海雷诺尔电力自动化有限公司 | Modular power unit suitable for chain type dynamic electric energy control apparatus |
| WO2018040308A1 (en) * | 2016-08-31 | 2018-03-08 | 浙江海得新能源有限公司 | Power cabinet for wind power converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986309A (en) * | 2014-05-23 | 2014-08-13 | 台达电子企业管理（上海）有限公司 | Direct-current capacitor module and laminated busbar structure thereof |
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2018
- 2018-07-11 CN CN201810757906.6A patent/CN108768138B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201436781U (en) * | 2009-02-24 | 2010-04-07 | 上海雷诺尔电气有限公司 | Main structure of frequency conversion speed regulator |
| CN202135072U (en) * | 2011-08-05 | 2012-02-01 | 南京国睿新能电子有限公司 | Inverted power supply main circuit unit device with module parallelly connected |
| CN202488145U (en) * | 2012-01-17 | 2012-10-10 | 上海雷诺尔电力自动化有限公司 | Modular power unit suitable for chain type dynamic electric energy control apparatus |
| WO2018040308A1 (en) * | 2016-08-31 | 2018-03-08 | 浙江海得新能源有限公司 | Power cabinet for wind power converter |
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| 节能变频器叠层母线的设计;沈瑾;;电机与控制应用(第05期);全文 * |
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Inventor after: Chen Guocheng Inventor after: Acting Army Inventor after: Shi Chenggang Inventor after: Zheng Xuwang Inventor after: Du Xiaogang Inventor after: Hu Xianghai Inventor before: Chen Guocheng Inventor before: Acting Army Inventor before: Zheng Xuwang Inventor before: Du Xiaogang Inventor before: Hu Xianghai |
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Address after: 201800 Building 1, 188 Lane 3968, Chengbei Road, Jiading District, Shanghai Applicant after: SHANGHAI RENLE SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 201800, 1, 3980 North Road, Shanghai, Jiading District Applicant before: SHANGHAI RENLE SCIENCE & TECHNOLOGY Co.,Ltd. |
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