Power converter and brace for power converter

Abstract

This power conversion device comprises: an enclosure; a plurality of power converters arranged vertically; first and second support posts, each of which stands vertically inside the enclosure and supports the plurality of power converters; and a brace extending in a designated direction and connected to the first support post and the second support post. The first support post has a raised part to which the brace is connected. The brace includes: an insulating rodlike member having an end part and extending in the designated direction; and a securing member, connected to the end part, for securing the brace to the raised part. The securing member has: a base part extending in the designated direction and connected to the end part; and a connecting part branching off from the base part in two limbs so as to envelop the raised part from two sides, and connected to the raised part by means of a pin.

Description

Technical Field

[0001] The present disclosure relates to a power conversion device and a brace for a power conversion device.

Background Art

[0002] Conventionally, various structures provided with braces (diagonal members) are known. For example, Japanese Patent Application Laid-Open No. 2010-59781 (Patent Document 1) discloses an electric platform including a support structure for supporting electric equipment, a plurality of legs extending from the support structure, a brace extending between at least two of the plurality of legs, and a damper disposed on the brace.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The brace of Patent Document 1 is connected to a column support base on the lower end side.For details, the brace and the column support base are connected by a pin with one side surface on the lower end side of the brace facing one side surface of the column support base.In such a pin connection between the brace and the column, from the viewpoint of ensuring strength, the diameter of the pin has to be increased.

[0005] The present disclosure provides a power conversion device capable of reducing the diameter of a pin connecting a brace and a column, and a brace for a power conversion device.

Means for Solving the Problems

[0006] According to a certain aspect of the present disclosure, a power converter comprises a housing, a plurality of power converters arranged vertically side by side, first and second columns, each vertically positioned within the housing and supporting the plurality of power converters, and a brace extending in a predetermined direction and connected to the first and second columns. The first column has a first projection to which the brace is connected. The brace includes an insulating rod-shaped member having a first end and extending in a predetermined direction, and a first fixing member connected to the first end and for fixing the brace to the first projection. The first fixing member has a first base extending in a predetermined direction and connected to the first end, and a first connecting portion branching bifurcated from the first base so as to sandwich the first projection and connected to the first projection by a pin.

[0007] Preferably, the second support has a second projection to which the brace is connected, at a position higher than the first projection. The rod-shaped member further has a second end opposite to the first end. The brace further includes a second fixing member connected to the second end and for fixing the brace to the second projection. The second fixing member has a second base extending in a predetermined direction and connected to the second end, and a second connecting portion branching bifurcated from the second base so as to sandwich the second projection and connected to the second projection by a pin.

[0008] Preferably, the first support column includes a conductive first portion, a first insulator, and a conductive second portion, extending vertically from bottom to top. The second support column includes a conductive third portion, a second insulator, and a conductive fourth portion, extending vertically from bottom to top. The first and second insulators are provided at the same height. The first portion has a first protrusion. The fourth portion has a second protrusion.

[0009] Preferably, the power converter further comprises a plurality of first frame members arranged horizontally and supporting a predetermined stage of power converters among the plurality of power converters, and a plurality of second frame members arranged horizontally and supporting a power converter one stage above the predetermined stage among the plurality of power converters. The first portion and the third portion are parts of the first frame member. The second portion and the fourth portion are parts of the second frame member. The first frame member including the first portion and the first frame member including the third portion are adjacent to each other. The second frame member including the second portion and the second frame member including the fourth portion are adjacent to each other.

[0010] Preferably, the rod-shaped member is made of epoxy resin. In other aspects of the present disclosure, a brace for a power converter comprises an insulating rod-shaped member having first and second ends, a first fixing member connected to the first end for fixing the brace to a first projection of a first support column provided within the power converter, and a second fixing member connected to the second end for fixing the brace to a second projection of a second support column provided within the power converter. The first fixing member is bifurcated to allow it to clamp the first projection and has a first connecting portion that can be connected to the first projection with a pin. The second fixing member is bifurcated to allow it to clamp the second projection and has a second connecting portion that can be connected to the second projection with a pin. [Effects of the Invention]

[0011] According to this disclosure, it is possible to reduce the diameter of the pins that connect the brace and the support column. [Brief explanation of the drawing]

[0012] [Figure 1] This is a diagram showing the internal structure of a power converter. [Figure 2] This is a magnified view of a portion of the area shown in Figure 1. [Figure 3] Figure 2 is a top view of the brace shown. [Figure 4] Figure 2 is a side view of the brace shown. [Figure 5] This is an enlarged perspective view of a portion of the area shown in Figure 2, viewed from an oblique angle. [Modes for carrying out the invention]

[0013] The power conversion device according to an embodiment of the present invention will be described below with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions of them will not be repeated.

[0014] Furthermore, while the embodiments described below may refer to the number, quantity, etc., the scope of this disclosure is not necessarily limited to such number, quantity, etc. In addition, the drawings do not depict the dimensions in proportion to the actual dimensions, and in order to facilitate understanding of the structure, the proportions have been altered in some places to make the structure clearer.

[0015] Figure 1 shows the internal structure of the power converter. As shown in Figure 1, the power converter 1 is installed on a horizontal floor surface FL. The power converter 1 comprises a laminated structure 5 and a housing 10. The laminated structure 5 is housed in the housing 10. The housing 10 has a bottom 11.

[0016] The laminated structure 5 comprises a plurality of insulator assemblies 20, 40, 60, a plurality of plate members 30, 70, a plurality of frame members 50, a plurality of power converters 80, and a plurality of brace pairs 100. Each insulator assembly 20, 40, 60 extends in the Z direction (vertical direction). The plate members 30, 70 and each frame member 50 extend in the X direction (horizontal direction), which is perpendicular to the Z direction. The plate members 30 and each frame member 50 also extend in the Y direction (see Figure 5), which is perpendicular to the Z and X directions.

[0017] The plurality of power converters 80 are arranged side by side in the X direction. The plurality of power converters 80 are also arranged side by side in the Z direction. Thus, the plurality of power converters 80 are arranged in multiple stages (in this example, five stages).

[0018] Each frame member 50 is made of metal. Therefore, each frame member 50 has conductivity. In the power conversion device 1, a plurality (in this example, four) of frame members 50 are arranged side by side in the X direction. In the power conversion device 1, a plurality (in this example, five) of frame members 50 are arranged side by side in the Z direction. The four frame members 50 arranged side by side in the X direction support a plurality (in this example, six) of power converters 80 in one stage.

[0019] The brace pair hundred includes braces 110 and braces 120 that intersect each other in the front view of the power conversion device One. Each brace 110 extends in the D1 direction. Each brace 120 extends in the D2 direction. The D1 direction and the D2 direction are diagonal directions (predetermined directions) in the front view of the power conversion device One. The brace 110 and the brace 120 are separated in the Y direction (see FIG. 5) in the front view of the power conversion device One.

[0020] Each insulator assembly 20 is erected on the bottom 11 of the housing 10. The plate member 30 is supported from below by a plurality of insulator assemblies 20. A plurality of insulator assemblies 40 are erected on the plate member thirty.

[0021] Each insulator assembly 40 supports the lowermost frame member 50 from below. The plate member 70 is supported from below by a plurality of frame members 50. Each insulator assembly 60 is supported from below by the frame member 50 and supports the upper (upper stage) frame member 50 from below. In the laminated structure 5, the frame member 50 and the insulator assembly 60 are laminated in multiple layers in this order from bottom to top.

[0022] More specifically, the laminated structure 5 includes a plurality of support columns 8A, 8B, 8C, 8D, ... In this example, each support column 8A, 8B, 8C, 8D, ... is composed of an insulator assembly 40, a plurality of frame members 50 (more specifically, a part of the frame members 50), and a plurality of insulator assemblies 60. Each of the support columns 8A, 8B, 8C, 8D, ... is erected in the Z direction within the housing 10 and supports a plurality of power converters 80.

[0023] Figure 2 is an enlarged view of a portion of region M1 shown in Figure 1. In the following, in order to distinguish the four frame members 50 shown in Figure 2 from each other, the lower left frame member 50 will be referred to as "frame member 51". Similarly, the upper left frame member 50, the lower right frame member 50, and the upper right frame member 50 will also be referred to as "frame member 52", "frame member 53", and "frame member 54", respectively. Furthermore, in order to distinguish the two insulator assemblies 60, the left insulator assembly 60 will be referred to as "insulator assembly 61". Similarly, the right insulator assembly 60 will be referred to as "insulator assembly 62".

[0024] Frame member 51 and frame member 53 are adjacent in the X direction. Similarly, frame member 52 and frame member 54 are also adjacent in the X direction. Frame member 51, frame member 52, frame member 53, and frame member 54 have different potentials from each other.

[0025] The insulator assembly 61 is interposed between the frame member 51 and the frame member 52 in the Z direction. The insulator assembly 61 is erected on the frame member 51 and supports the frame member 52 from below.

[0026] The insulator assembly 61 has metal insulator fixing parts 611 and 613 and an insulator 612. The insulator fixing part 613 is located above the insulator fixing part 611. The insulator 612 is sandwiched in the Z direction by the insulator fixing parts 611 and 613. The insulator assembly 61 insulates the frame member 51 and the frame member 52 by the insulator 612.

[0027] The insulator assembly 62 is interposed between the frame member 53 and the frame member 54 in the Z direction. The insulator assembly 62 is erected on the frame member 53 and supports the frame member 54 from below.

[0028] The insulator assembly 62 has metal insulator fixing parts 621 and 623 and an insulator 622. The insulator fixing part 623 is located above the insulator fixing part 621. The insulator 622 is sandwiched in the Z direction by the insulator fixing parts 621 and 623. The insulator assembly 62 insulates the frame member 53 and the frame member 54 by the insulator 622.

[0029] The insulator assembly 62 is installed at the same height as the insulator assembly 61. The height of insulator 612 from the floor surface FL (Figure 1) is the same as the height of insulator 622 from the floor surface FL. More specifically, the height of insulator 612 from the bottom 11 (Figure 1) is the same as the height of insulator 622 from the bottom 11.

[0030] The frame member 51 has a vertical portion 511 extending in the Z direction. That is, the vertical portion 511 is part of the frame member 51. The vertical portion 511 has four protrusions 5111, 5112, 5113, and 5114 projecting in the X direction. Each of the protrusions 5111, 5112, 5113, and 5114 has a through hole (not shown) for passing a pin 900 through. These through holes extend in the Y direction (see Figure 5).

[0031] In a front view of the power converter 1, the protrusion 5111 is located on the lower left side of the vertical section 511. The protrusion 5112 is located on the upper left side of the vertical section 511. The protrusion 5113 is located on the lower right side of the vertical section 511. The protrusion 5114 is located on the upper right side of the vertical section 511.

[0032] More specifically, protrusion 5112 is located above protrusion 5111. Protrusion 5114 is located above protrusion 5113. The positions of protrusion 5112 and protrusion 5114 are the same in the Z direction. That is, the heights of protrusion 5112 and protrusion 5114 from the floor surface FL are the same. Similarly, the positions of protrusion 5111 and protrusion 5113 are the same in the Z direction. That is, the heights of protrusion 5111 and protrusion 5113 from the bottom 11 and from the floor surface FL are the same.

[0033] More specifically, the shapes of convex portion 5112 and convex portion 5114 are symmetrical with respect to a line. The shapes of convex portion 5111 and convex portion 5113 are symmetrical with respect to a line. The shapes of convex portion 5111 and convex portion 5112 are symmetrical with respect to a line. The shapes of convex portion 5113 and convex portion 5114 are symmetrical with respect to a line.

[0034] The frame member 52 has a vertical portion 521 extending in the Z direction. That is, the vertical portion 521 is part of the frame member 52. The vertical portion 521 has four protrusions 5211, 5212, 5213, and 5214 projecting in the X direction. Each of the protrusions 5211, 5212, 5213, and 5214 has a through hole (not shown) for passing a pin 900 through. The through hole extends in the Y direction. The positional relationship of each protrusion 5211, 5212, 5213, and 5214 is the same as the positional relationship of each protrusion 5111, 5112, 5113, and 5114, so the explanation will not be repeated.

[0035] The frame member 53 has a vertical portion 531 extending in the Z direction. That is, the vertical portion 531 is part of the frame member 53. The vertical portion 531 has four protrusions 5311, 5312, 5313, and 5314 projecting in the X direction. Each of the protrusions 5311, 5312, 5313, and 5314 has a through hole (not shown) for passing a pin 900 through. The through hole extends in the Y direction. The positional relationship of each protrusion 5311, 5312, 5313, and 5314 is the same as the positional relationship of each of the protrusions 5111, 5112, 5113, and 5114, so the explanation will not be repeated.

[0036] The frame member 54 has a vertical portion 541 extending in the Z direction. That is, the vertical portion 541 is part of the frame member 54. The vertical portion 541 has four protrusions 5411, 5412, 5413, and 5414 projecting in the X direction. Each of the protrusions 5411, 5412, 5413, and 5414 has a through hole (not shown) for passing a pin 900 through. The through hole extends in the Y direction. The positional relationship of each protrusion 5411, 5412, 5413, and 5414 is the same as the positional relationship of each protrusion 5111, 5112, 5113, and 5114, so the explanation will not be repeated.

[0037] Furthermore, within region M2, the heights of the protrusions 5112, 5114, 5312, and 5314 from the floor surface FL are the same. Similarly, within region M2, the heights of the protrusions 5211, 5213, 5411, and 5413 from the floor surface FL are also the same.

[0038] Frame members 51 and 53 support the second row of power converters 80 from the bottom. Frame members 52 and 54 support the third row of power converters 80 from the bottom. In this way, frame members 52 and 54 support the power converters 80 one row higher than those supported by frame members 51 and 53 from below.

[0039] The brace 110 is connected to frame member 51 and frame member 54. More specifically, the brace 110 is connected to vertical portion 511 and vertical portion 541. More specifically, the brace 110 is fixed (connected) to protrusion 5114 and protrusion 5411 by pins 900. In this way, the brace 110 is engaged with frame member 51 and frame member 54.

[0040] The brace 120 is connected to frame member 52 and frame member 53. More specifically, the brace 120 is connected to vertical section 521 and vertical section 531. More specifically, the brace 120 is fixed (connected) to protrusions 5211 and 5312 by pins 900. In this way, the brace 120 is engaged with frame member 52 and frame member 53.

[0041] Column 8B includes a part of frame member 51, an insulator assembly 61, and a part of frame member 52, extending from bottom to top in the Z direction. More specifically, column 8B includes the vertical portion 511 of frame member 51, the insulator assembly 61, and the vertical portion 521 of frame member 52. Column 8C includes a part of frame member 53, an insulator assembly 62, and a part of frame member 54, extending from bottom to top in the Z direction. More specifically, column 8C includes the vertical portion 531 of frame member 53, the insulator assembly 62, and the vertical portion 541 of frame member 54.

[0042] Figure 3 is a top view of the brace 110 shown in Figure 2. Figure 4 is a side view of the brace 110 shown in Figure 2. As shown in Figures 3 and 4, the brace 110 has an insulating rod-shaped member 1110 extending in the D1 direction and two fixing members 1120 and 1130. In this example, the rod-shaped member 1110 is made of glass epoxy. The fixing members 1120 and 1130 are made of metal. The rod-shaped member 1110 has ends 1111 and 1112. The ends 1111 and 1112 are threaded for engaging with the fixing members 1120 and 1130.

[0043] The fixing member 1120 is connected to the end 1111 of the rod-shaped member 1110. The fixing member 1120 has a base 1121 that extends in the D1 direction and is connected to the end 1111. The fixing member 1120 further has a connecting portion 1122 that branches into two from the base 1121 so as to be able to sandwich the protrusion 5114 (Figure 2). Two through holes P1 and P3 are formed in the connecting portion 1122 through which the pin 900 passes. The through holes P1 and P3 extend in the Y direction. The inside of the base 1121 is hollow and has threads cut inside for engaging with the end 1111 of the rod-shaped member 1110.

[0044] The fixing member 1130 is connected to the end 1112 of the rod-shaped member 1110. The fixing member 1130 has a base 1131 that extends in the D1 direction and is connected to the end 1112. The fixing member 1130 further has a connecting portion 1132 that branches into two from the base 1131 so as to be able to sandwich the protrusion 5411 (Figure 2). Two through holes P2 and P4 are formed in the connecting portion 1132 through which the pin 900 passes. The through holes P2 and P4 extend in the Y direction. The inside of the base 1131 is hollow and has threads cut inside for engaging with the end 1112 of the rod-shaped member 1110. The connecting portions 1122 and 1132 are both ends (tip portions) of the brace 110.

[0045] The brace 120 has a similar structure to the brace 110. Specifically, the brace 120 has an insulating rod-shaped member 1210 extending in the D2 direction and two fixing members 1220 and 1230. In this example, the rod-shaped member 1210 is made of glass epoxy. The fixing members 1220 and 1230 are made of metal. The rod-shaped member 1210 has ends 1211 and 1212. The ends 1211 and 1212 are threaded to engage with the fixing members 1220 and 1230.

[0046] The fixing member 1220 is connected to the end 1211 of the rod-shaped member 1210. The fixing member 1220 has a base 1221 that extends in the D2 direction and is connected to the end 1211. The fixing member 1220 further has a connecting portion 1222 that branches into two from the base 1221 so as to be able to sandwich the protrusion 5213 (Figure 2). Two through holes P1 and P3 are formed in the connecting portion 1222 through which the pin 900 passes. The inside of the base 1221 is hollow and has threads cut into it for engaging with the end 1211 of the rod-shaped member 1210.

[0047] The fixing member 1230 is connected to the end 1212 of the rod-shaped member 1210. The fixing member 1230 has a base 1231 that extends in the D2 direction and is connected to the end 1212. The fixing member 1230 further has a connecting portion 1232 that branches into two from the base 1231 so as to be able to sandwich the protrusion 5312 (Figure 2). Two through holes P2 and P4 are formed in the connecting portion 1232 through which the pin 900 passes. The inside of the base 1231 is hollow and has threads cut inside for engaging with the end 1212 of the rod-shaped member 1210. Note that the connecting portions 1222 and 1232 are connected to the brace 1 2 These are the two ends (tip) of 0.

[0048] Figure 5 is an enlarged perspective view of a portion of the region M2 shown in Figure 2, viewed from an oblique angle. As shown in Figure 5, the frame member 53 has a vertical portion 531 in addition to a horizontal portion 532 extending in the Y-axis direction. The other frame members 51, 52, and 54 also have horizontal portions (not shown) extending in the Y-direction, similar to the frame member 53. In this example, each of the frame members 51 to 54 has a plurality of vertical portions extending in the Z-direction and arranged in a line in the Y-direction, and two horizontal portions extending in the Y-direction and arranged vertically.

[0049] As described above, the brace 110 extends in the direction of D1. The brace 110 is connected to the support column 8B and the support column 8C. The brace 110 is fixed to the frame member 51 and the frame member 54. Specifically, the brace 110 is fixed to the protrusion 5114 of the frame member 51 and the protrusion 5411 of the frame member 54.

[0050] More specifically, the brace 110 is fixed to the protrusion 5114 of the frame member 51 by a fixing member 1120. More specifically, the connecting portion 1122 of the fixing member 1120 is connected to the protrusion 5114 by a pin 900. The connecting portion 1122 is fixed to the protrusion 5114 by sandwiching it from both sides in the Y direction.

[0051] The brace 110 is fixed to the protrusion 5411 of the frame member 54 by a fixing member 1130. More specifically, the connecting portion 1132 of the fixing member 1130 is connected to the protrusion 5411 by a pin 900. The connecting portion 1132 is fixed to the protrusion 5411 by sandwiching it from both sides in the Y direction.

[0052] As described above, the brace 120 extends in the direction of D2. The brace 120 is connected to the support column 8B and the support column 8C. The brace 120 is fixed to the frame member 52 and the frame member 53. Specifically, the brace 120 is fixed to the protrusion 5213 of the frame member 52 and the protrusion 5312 of the frame member 53.

[0053] More specifically, the brace 120 is fixed to the protrusion 5213 of the frame member 52 by a fixing member 1220. More specifically, the connecting portion 1222 of the fixing member 1220 is connected to the protrusion 5213 by a pin 900. The connecting portion 1222 is fixed to the protrusion 5213 by sandwiching it from both sides in the Y direction.

[0054] The brace 120 is fixed to the protrusion 5312 of the frame member 53 by a fixing member 1230. More specifically, the connecting portion 1232 of the fixing member 1230 is connected to the protrusion 5312 by a pin 900. The connecting portion 1232 is fixed to the protrusion 5312 by sandwiching it from both sides in the Y direction.

[0055] The rod-shaped member 1110 of brace 110 and the rod-shaped member 1210 of brace 120 overlap in a front view of the power converter 1. The rod-shaped member 1110 and the rod-shaped member 1210 are spaced apart in the Y direction.

[0056] <Advantages of braces 110 and 120> (1) High insulation The rod-shaped member 1110 is insulating. Therefore, frame member 51 and frame member 54 are insulated from each other. The rod-shaped member 1210 is insulating. Therefore, frame member 52 and frame member 53 are insulated from each other. Thus, frame member 51, frame member 52, frame member 53, and frame member 54 are insulated from each other by the rod-shaped members 1110, 1210 and the insulator assemblies 61, 62.

[0057] The insulating rod-shaped member 1110 of brace 110 ensures a sufficient insulation distance between frame member 51 and frame member 54. The insulating rod-shaped member 1210 of brace 120 ensures a sufficient insulation distance between frame member 52 and frame member 53. Therefore, braces 110 and 120 are suitable for a power conversion device 1 having a high-voltage power converter 80. Furthermore, the rod-shaped members 1110 and 1210 ensure sufficient insulation between brace 110 and brace 120.

[0058] (2) Miniaturization of pin 900 The brace 110 has a bifurcated connecting portion 1122 that branches off from the base 1121. Therefore, the diameter of the pin 900 connecting the brace 110 and the support column 8B can be reduced compared to a configuration in which the connecting portion does not branch off. The brace 110 further has a bifurcated connecting portion 1132 that branches off from the base 1131. Therefore, the diameter of the pin 900 connecting the brace 110 and the support column 8C can be reduced compared to a configuration in which the connecting portion does not branch off.

[0059] The brace 120 has a bifurcated connecting portion 1222 that branches off from the base 1221. Therefore, the diameter of the pin 900 connecting the brace 120 and the support column 8B can be reduced compared to a configuration in which the connecting portion does not branch off. The brace 120 further has a bifurcated connecting portion 1232 that branches off from the base 1231. Therefore, the diameter of the pin 900 connecting the brace 120 and the support column 8C can be reduced compared to a configuration in which the connecting portion does not branch off.

[0060] Specifically, the diameter of each pin 900 can be reduced to about half compared to a configuration where the connection point is not bifurcated. For example, if a pin with a diameter of 42 mm was used in a configuration where the connection point is not bifurcated, the diameter of pin 900 can be reduced to 30 mm by using braces 110 and 120. Because the diameter of pin 900 can be reduced in this way, it becomes easier to attach braces 110 and 120 to frame members 51 to 54.

[0061] <Summary of structure> The power converter 1 can be said to have the following configuration, focusing on the brace 110. The same can be said when focusing on the brace 120.

[0062] (1) As shown in Figures 1 and 2, the power converter 1 comprises (i) a housing 10, (ii) a plurality of power converters 80 arranged vertically side by side, (iii) columns 8B and 8C, each erected vertically within the housing 10 and supporting the plurality of power converters 80, and (iv) a brace 110 extending in the D1 direction and connected to columns 8B and 8C. As shown in Figures 2 and 5, column 8B has a protrusion 5114 to which the brace 110 is connected.

[0063] As shown in Figures 3 and 4, the brace 110 includes (i) an insulating rod-shaped member 1110 having an end 1111 and extending in the D1 direction, and (ii) a fixing member 1120 connected to the end 1111 and for fixing the brace 110 to the protrusion 5114 (see Figures 2 and 5). The fixing member 1120 has (i) a base portion 1121 extending in the D1 direction and connected to the end 1111, and (ii) a connecting portion 1122 that branches bifurcated from the base portion 1121 so as to sandwich the protrusion 5114 and is connected to the protrusion 5114 by a pin 900.

[0064] (2) As shown in Figures 2 and 5, the support column 8C has a projection 5411 at a position higher than the projection 5114 to which the brace 110 is connected. As shown in Figures 3 and 4, the rod-shaped member 1110 further has an end 1112 opposite to the end 1111. The brace 110 further includes a fixing member 1130 connected to the end 1112 and for fixing the brace 110 to the projection 5411. The fixing member 1130 has (i) a base 1131 extending in the direction of D1 and connected to the end 1112, and (ii) a connecting portion 1132 that branches bifurcated from the base 1131 so as to sandwich the projection 5411 and is connected to the projection 5411 by a pin 900.

[0065] (3) As shown in Figures 1 and 2, the power converter 1 further comprises a brace 120 extending in the direction of D2 and connected to the support columns 8B and 8C. As shown in Figures 2 and 5, the support column 8C has a projection 5312 at the same height as the projection 5114 to which the brace 120 is connected. As shown in Figures 3 and 4, the brace 120 includes (i) an insulating rod-shaped member 1210 extending in the direction of D2 and having an end 1212 at the same height as the end 1111, and (ii) a fixing member 1230 connected to the end 1212 and for fixing the brace 120 to the projection 5312. The fixing member 1230 has (i) a base portion 1231 that extends in the direction of D2 and is connected to the end portion 1212, and (ii) a connecting portion 1232 that branches into two from the base portion 1231 so as to sandwich the protrusion 5312 and is connected to the protrusion 5312 by a pin 900.

[0066] (4) As shown in Figures 2 and 5, the support column 8B has a projection 5213 at the same height as the projection 5411 to which the brace 120 is connected. As shown in Figures 3 and 4, the rod-shaped member 1210 further has an end 1211 opposite to the end 1212. The brace 120 further includes a fixing member 1220 connected to the end 1211 and for fixing the brace 120 to the projection 5213. The fixing member 1220 has (i) a base 1221 extending in the direction of D2 and connected to the end 1211, and (ii) a connecting portion 1222 that branches bifurcated from the base 1221 so as to sandwich the projection 5213 and is connected to the projection 5213 by a pin 900.

[0067] (5) As shown in Figure 2, the support column 8B includes an insulator 612 between the protrusion 5114 and the protrusion 5213 to insulate the protrusion 5114 from the protrusion 5213. The support column 8C includes an insulator 622 between the protrusion 5312 and the protrusion 5411 to insulate the protrusion 5312 from the protrusion 5411.

[0068] (6) As shown in Figure 2, the support column 8B includes a conductive vertical section 511, an insulator 612, and a conductive vertical section 521 extending from the bottom to the top in the vertical direction. The support column 8C includes a conductive vertical section 531, an insulator 622, and a conductive vertical section 541 extending from the bottom to the top. The insulators 612 and 622 are provided at the same height. The vertical section 511 has a protrusion 5114. The vertical section 541 has a protrusion 5411.

[0069] (7) As shown in Figures 1 and 2, the power converter 1 further comprises a plurality of frame members 50 (hereinafter referred to as "first frame members") arranged in the X direction (horizontal direction) and supporting power converters of a predetermined stage among the plurality of power converters 80, and a plurality of frame members 50 (hereinafter referred to as "second frame members") arranged in the X direction and supporting power converters 80 one stage above the predetermined stage among the plurality of power converters 80. The vertical portion 511 and the vertical portion 531 are part of the first frame member. The vertical portion 521 and the vertical portion 541 are part of the second frame member. The first frame member including the vertical portion 511 and the first frame member including the vertical portion 531 are adjacent to each other. The second frame member including the vertical portion 521 and the second frame member including the vertical portion 541 are adjacent to each other.

[0070] (8) The rod-shaped members 1110 and 1210 are made of epoxy resin. Next, focusing on the brace 110 used in the power converter 1, we find the following:

[0071] As shown in Figures 3 to 5, the brace 110 comprises (i) an insulating rod-shaped member 1110 having ends 1111 and 1112, (ii) a fixing member 1120 connected to end 1111 and for fixing the brace 110 to a protrusion 5114 of a support column 8B provided inside the power converter 1, and (iii) a fixing member 1130 connected to end 1112 and for fixing the brace 110 to a protrusion 5411 of a support column 8C provided inside the power converter 1. The fixing member 1120 is bifurcated so as to be able to sandwich the protrusion 5114 and has a connecting portion 1122 that can be connected to the protrusion 5114 by a pin 900. The fixing member 1130 is branched into two so as to be able to sandwich the protrusion 5411, and has a connecting portion 1132 that can be connected to the protrusion 5411 by a pin 900.

[0072] The embodiments disclosed herein are illustrative and not limited to those described herein. The scope of the present invention is indicated by the claims, and all modifications within the meaning and scope of the claims are intended to be included. [Explanation of symbols]

[0073] 1 Power converter, 5 Laminated structure, 8A, 8B, 8C, 8D Support column, 10 Housing, 11 Bottom, 20, 40, 60, 61, 62 a 30, 70 Plate members, 50, 51, 52, 53, 54 Frame members, 80 Power converter, 100 Brace pairs, 110, 120 Braces, 511, 521, 531, 541 Vertical parts, 523 Horizontal parts, 611, 613, 621, 623 Insulator fixing parts, 612, 622 Insulators, 900 Pins, 1110, 1210 Rod-shaped members, 1111, 1112, 1211, 1212 End parts, 1120, 1130, 1220, 1230 Fixing members, 1121, 1131, 1221, 1231 Base parts, 1122, 1132, 1222, 1232 Connection part, 5111, 5112, 5113, 5114, 5211, 5212, 5213, 5214, 5311, 5312, 5313, 5314, 5411, 5412, 5413, 5414 protrusion, FL floor surface, M1 area, P1, P2, P3, P4 through hole.

Claims

1. The casing and Multiple power converters arranged in a vertical line, Each of the first and second support columns is erected vertically within the housing and supports the plurality of power converters, A brace extending in a predetermined direction and connected to the first support and the second support, The first support column has a first protrusion to which the brace is connected, The aforementioned brace is An insulating rod-shaped member having a first end and extending in the predetermined direction, It includes a first fixing member connected to the first end and for fixing the brace to the first protrusion, The first fixing member is, A first base extending in the predetermined direction and connected to the first end, It has a first connecting portion that branches into two from the first base so as to sandwich the first protrusion and is connected to the first protrusion by a pin, The second support column has a second protrusion at a position higher than the first protrusion to which the brace is connected. The rod-shaped member further has a second end opposite to the first end, The brace further includes a second fixing member connected to the second end and for fixing the brace to the second protrusion, The second fixing member is, A second base extending in the predetermined direction and connected to the second end, It has a second connecting portion that branches bifurcated from the second base portion so as to sandwich the second protrusion portion and is connected to the second protrusion portion by a pin, The first support column includes a conductive first portion, a first insulator, and a conductive second portion, extending from the lower vertical direction upward. The second support column includes a conductive third portion, a second insulator, and a conductive fourth portion, extending from the lower part to the upper part. The first insulator and the second insulator are installed at the same height. The first portion has the first protrusion, The fourth part is a power conversion device having the second protrusion.

2. A plurality of first frame members are arranged horizontally and support a predetermined stage of power converters among the plurality of power converters, The present invention further comprises a plurality of second frame members arranged horizontally and supporting a power converter one stage above the predetermined stage among the plurality of power converters, The first part and the third part are parts of the first frame member, The second part and the fourth part are parts of the second frame member, The first frame member including the first portion and the first frame member including the third portion are adjacent to each other. The power conversion device according to claim 1, wherein the second frame member including the second portion and the second frame member including the fourth portion are adjacent to each other.

3. The power conversion device according to claim 1 or 2, wherein the rod-shaped member is made of epoxy resin.

4. Multiple power converters, Each of the first and second support columns, each having an insulator and a conductive part arranged alternately, supports the plurality of power converters. The structure comprises a brace connected to the first support column and the second support column, The first support column is provided in the conductive portion and has a first support column side connection portion to which the brace is connected. The second support column is provided on a conductive portion of the first support column that corresponds to the conductive portion of the first support column that is located on the opposite side of the insulator, and has a second support column-side connection portion to which the brace is connected. The brace comprises an insulating rod-shaped member, a first brace-side connection portion provided at one end of the rod-shaped member, and a second brace-side connection portion provided at the other end. The first brace-side connection is connected to the first support-side connection, The second brace-side connection is a power converter connected to the second column-side connection.

5. The first support column side connection portion and the second support column side connection portion have a convex structure, The first brace-side connection portion has a bifurcated structure that sandwiches the first support-side connection portion. The power conversion device according to claim 4, wherein the second brace-side connection portion has a bifurcated structure that sandwiches the second support-side connection portion.

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