SHORT-CIRCUIT-PROOF BUSBAR ASSEMBLY

Abstract

A busbar assembly includes first, second, and third busbars at least partly arranged in parallel relation, wherein the first and second busbars are offset to each other such that a first straight line which does not pass through the second busbar is formed perpendicularly to a longer extension of the first busbar, the first and third busbars are offset to each other such that a second straight line which does not pass through the third busbar is formed perpendicularly to the longer extension of the first busbar, and the second and third busbars are not offset to each other such that a third straight line which is formed perpendicularly to the longer extension of the second busbar passes through the third busbar. The busbar assembly is configured at least partly mirror-symmetrical to a plane running through the first busbar and parallel to the longer extension of the first busbar.

Claims

1.-11. (canceled)

12. A busbar assembly, comprising: first, second and third busbars arranged at least partly in parallel relation to one another, with the first and second busbars being offset relative to each other such that a first straight line which does not pass through the second busbar is formed perpendicularly to a longer extension of a cross-section of the first busbar, with the first and third busbars being offset relative to each other such that a second straight line which does not pass through the third busbar is formed perpendicularly to the longer extension of the cross-section of the first busbar, with the second and third busbars being not offset relative to each other such that a third straight line which is formed perpendicularly to a longer extension of a cross-section of the second busbar passes through the third busbar, said busbar assembly being configured with respect to the first, second and third busbars at least partly mirror symmetrical to a plane which runs through an interior of the first busbar and parallel to the longer extension of the first busbar; and an electrically insulating support configured to mechanically connect together two of the first, second and third busbars.

13. The busbar assembly of claim 12, wherein the first, second and third busbars have a same cross-section.

14. The busbar assembly of claim 12, wherein the first, second and third busbars have a substantially rectangular cross-section, with the busbars that are offset relative to each other in pairs being offset in a direction of a longer edge of the rectangular cross-section.

15. The busbar assembly of claim 14, wherein the first, second and third busbars are oriented relative to each other in such a way that the longer edges of the rectangular cross-section of the busbars are parallel to each other.

16. The busbar assembly of claim 12, wherein the support has the form of a cuboid.

17. The busbar assembly of claim 12, wherein the support comprises a highly loadable laminate according to DIN EN 60893-3-2.

18. The busbar assembly of claim 12, wherein the laminate is of HGW material EP-GC 202.

19. The busbar assembly of claim 12, wherein the support is configured to absorb without destruction a force between the two of the first, second and third busbars that are connected to the support, as a result of a short-circuit current flowing in the busbars.

20. The busbar assembly of claim 19, wherein the support is configured for a value of the short-circuit current of more than 100 kA.

21. A converter, comprising a busbar assembly, said busbar assembly comprising first, second and third busbars arranged at least partly in parallel relation to one another, with the first and second busbars being offset relative to each other such that a first straight line which does not pass through the second busbar is formed perpendicularly to a longer extension of a cross-section of the first busbar, with the first and third busbars being offset relative to each other such that a second straight line which does not pass through the third busbar is formed perpendicularly to the longer extension of the cross-section of the first busbar, with the second and third busbars being not offset relative to each other such that a third straight line which is formed perpendicularly to a longer extension of a cross-section of the second busbar passes through the third busbar, said busbar assembly being configured with respect to the first, second and third busbars at least partly mirror symmetrical to a plane which runs through an interior of the first busbar and parallel to the longer extension of the first busbar, and an electrically insulating support configured to mechanically connect together two of the first, second and third busbars.

22. The converter of claim 21, further comprising a IGCT semiconductor component.

23. The converter of claim 21, wherein the first, second and third busbars have a same cross-section.

24. The converter of claim 21, wherein the first, second and third busbars have a substantially rectangular cross-section, with the busbars that are offset relative to each other in pairs being offset in a direction of a longer edge of the rectangular cross-section.

25. The converter of claim 24, wherein the first, second and third busbars are oriented relative to each other in such a way that the longer edges of the rectangular cross-section of the busbars are parallel to each other.

26. The converter of claim 21, wherein the support has the form of a cuboid.

27. The converter of claim 21, wherein the support comprises a highly loadable laminate according to DIN EN 60893-3-2.

28. The converter of claim 21, wherein the laminate is of HGW material EP-GC 202.

29. The converter of claim 21, wherein the support is configured to absorb without destruction a force between the two of the first, second and third busbars that are connected to the support, as a result of a short-circuit current flowing in the busbars.

30. The converter of claim 29, wherein the support is configured for a value of the short-circuit current of more than 100 kA.

Description

[0033] The invention will be described and explained in more detail below with reference to the exemplary embodiments illustrated in the figures, in which:

[0034] FIG. 1 shows a busbar assembly,

[0035] FIG. 2, FIG. 3 show cross-sections through a busbar assembly,

[0036] FIG. 4 shows busbar assembly for a converter.

[0037] FIG. 1 shows the perspective representation of a busbar assembly 1. This busbar assembly 1 has three busbars 11, 12, 13. The first busbar 11 is offset with respect to the second and third busbars 12, 13 as this busbar 11 is slightly higher than the other busbars 12, 13. As already mentioned, the design of the first busbar 11 as an average potential bar is therefore particularly advantageous since a short-circuit can occur between this bar and the positive bar or the negative bar even with a simple component fault. The busbars 11, 12, 13 are mechanically connected by supports 2. The supports 2 each connect two of the busbars 11, 12, 13 together mechanically. This advantageously occurs by means of screw joints 21. These supports 2 are provided on the busbars 11, 12, 13 so as to be distributed over the length of the busbars 11, 12, 13.

[0038] FIG. 2 shows the cross-section through a converter assembly 1 having three busbars 11, 12, 13. It can clearly be seen that the first busbar 11 is offset with respect to the second and third busbars 12, 13 as the first busbar is offset in the direction of the long edge 20 of the rectangular cross-section, in other words longitudinally. In this exemplary embodiment the first busbar 11 carries the average potential, identified by 0, the second busbar 12 the positive potential, identified by + and the third busbar 13 the negative potential, identified by . In this arrangement the centers of the cross-sectional areas form an equilateral triangle. This favors the operating behavior of a converter having a busbar assembly of this kind since the busbar assembly has a symmetrical construction between positive potential and average potential as well as negative potential and average potential.

[0039] FIG. 3 shows the section through two busbars 11, 12 at the location of a support 2. To avoid repetition reference is made to the description relating to FIGS. 1 and 2 as well as to the reference numerals introduced there. The first busbar 11 and the second busbar 12 are offset relative to each other. The support 2 is used to fix the position of the two busbars 11, 12 relative to each other. To be able to absorb the forces in the event of a short-circuit as well, the support 2 should have a highly stable form. The busbars 11, 12 are attached by means of screw joints 21 to the support 2.

[0040] FIG. 4 shows a busbar assembly 1 for a three-phase converter. This is a three-level converter since this busbar assembly 1 has three busbars 11, 12, 13 and therefore three direct current potentials. The phases of the converter 3 arranged one above the other can clearly be seen. Each of these phases is connected to one or more semiconductor module(s) (not shown here), which enables a connection of the respective alternating current-side output to one of the direct current potentials. To avoid repetition reference is made to the description relating to FIGS. 1 to 3 as well as to the reference numerals introduced there.

[0041] In summary, the invention relates to a busbar assembly having at least one first and one second busbar, wherein the busbars are at least partly arranged parallel to one another. To improve the short-circuit behavior it is proposed that the first busbar and the second busbar are offset relative to each other. The invention also relates to converters having a busbar assembly of this kind.