Molded static induction device

Abstract

To provide a mold type stationary induction apparatus capable of improving insulation quality while securing cooling performance.SOLUTION: A mold type stationary induction apparatus 1 to which a cooling medium is supplied by a blower fan 7 provided outside a container 4 comprises: a partition plate 13 that airtightly partitions the inside of the container 4 into a lower space 4A communicating with a supply port 8 and an upper space 4B communicating with a discharge port 10; a plurality of partition plate supports 14 that support the partition plate 13 from below; and wind channels 15 disposed on a top surface of the partition plate 13. The partition plate supports 14 support the partition plate 13 in a state separated from a metal member disposed in the container 4 at a predetermined creepage insulation distance while suppressing curvature of the partition plate 13 on which a plurality of window parts 16 communicating with the respective wind channels 15 are formed.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a molded stationary induction machine. [Background technology]

[0002] Conventionally, in molded static induction devices, in order to achieve higher voltages and larger capacities, the windings are sometimes cooled by circulating a cooling medium inside a sealed container. In such cases, a blower fan is sometimes placed inside the container to directly form a flow of the cooling medium toward the windings, thereby improving the cooling efficiency (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2019-33176 Summary of the Invention [Problem to be solved by the invention]

[0004] However, to achieve higher voltages and larger capacities, it is necessary to improve cooling performance by circulating the cooling medium efficiently, but a structure that takes into account the insulation properties that accompany higher voltages is also required.

[0005] Therefore, the present invention provides a molded stationary induction device that can improve insulation while ensuring cooling performance. [Means for solving the problem]

[0006] The molded type stationary induction device includes an iron core, multiple cylindrical windings attached to the iron core, a container that houses the iron core and the windings, a supply port formed on the lower side of the container for supplying a cooling medium to the inside of the container by a blower fan provided outside the container, a discharge port formed on the upper side of the container for discharging the cooling medium from the inside of the container to a heat exchanger provided outside the container, a partition plate disposed inside the container and airtightly dividing the inside of the container into a lower space connected to the supply port and an upper space connected to the discharge port, multiple partition plate supports disposed below the partition plate and supporting the partition plate from below, and a wind tunnel disposed on the upper surface of the partition plate and covering the periphery of the windings.

[0007] The partition plates are located below each winding, connect the lower space and the upper space, and each have a window portion formed therein that is larger than the outer shape of the winding. The partition plate support suppresses bending of the partition plate, in which multiple windows are formed, and supports the partition plate at a specified surface insulation distance from the metal member placed inside the container. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing the appearance of a molded stationary induction device according to an embodiment; [Diagram 2] FIG. 1 is a schematic diagram showing an example of a winding configuration; [Diagram 3] FIG. 2 is a schematic diagram showing an example of the arrangement of components in a container; [Figure 4] FIG. 2 is a diagram showing a schematic configuration example of a partition plate; [Diagram 5] FIG. 1 is a schematic diagram showing an example of the configuration of a wind tunnel and wall members. [Figure 6] FIG. 1 is a schematic diagram showing an example of a wind tunnel installation. [Figure 7] FIG. 1 is a diagram showing a schematic example of a configuration and arrangement of a winding support; [Figure 8] A schematic diagram showing an example of the arrangement of partition plate supports [Figure 9] FIG. 1 is a schematic diagram showing an example of a partition support structure; [Figure 10]FIG. 13 is a diagram showing another example of the configuration of the partition plate and the partition plate support; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment will be described with reference to the drawings. As shown in Fig. 1, a molded type stationary induction device 1 includes an iron core 2, a plurality of cylindrical windings 3 attached to the iron core 2, and a container 4 that houses the iron core 2 and the windings 3. Hereinafter, the direction perpendicular to an installation surface 5 on which the container 4 is installed is referred to as the up-down direction.

[0010] The iron core 2 has, for example, three legs 2a, a lower end yoke portion 2b connecting the lower ends of the legs 2a, and an upper end yoke portion 2c connecting the upper ends of the legs 2a. However, the configuration of the iron core 2 shown in Fig. 1 is only an example, and the iron core 2 may have a different number of legs 2a. A winding 3 formed in a roughly cylindrical shape is attached to each of the legs 2a of the iron core 2.

[0011] 2, the winding 3 is configured by concentrically arranging an inner circumference side winding 3A on the inner circumference side and an outer circumference side winding 3B on the outer circumference side. The legs 2a are located on the inner circumference side of the inner circumference side winding 3A. Hereinafter, the direction in which the legs 2a extend is referred to as the axial direction, the direction around the axial direction is referred to as the circumferential direction, and the direction from the axial direction to the outside is referred to as the radial direction.

[0012] Between the inner winding 3A and the outer winding 3B, there is provided a gap (G) that is connected to both ends of the winding 3 in the axial direction and forms a flow path through which the cooling medium flows. The inner winding 3A and the outer winding 3B are formed by concentrically winding a conductor 3C, as shown in an enlarged view of a partial area (RA) of the inner winding 3A and a partial area (RB) of the outer winding 3B. A flow path member 3D, for example, made of insulating paper shaped in a corrugated shape, is disposed between the conductors 3C that are adjacent to each other in the radial direction. Therefore, a plurality of spaces that are connected to both ends of the axial direction are formed between the conductors 3C, and these spaces form an internal flow path 6 through which the cooling medium flows inside the winding 3.

[0013] As shown in FIG. 1, the container 4 that houses the iron core 2 and the windings 3 has a supply port 8 formed on the lower side for supplying a cooling medium to the inside of the container 4 by a blower fan 7 provided outside the container 4. The container 4 also has a discharge port 10 formed on the upper side for discharging the cooling medium from the inside of the container 4 to a heat exchanger 9 provided outside the container 4. Hereinafter, the direction from left to right in the front view seen from the side where the supply port 8 is formed will be referred to as the left-right direction, and the direction in which the windings 3 are arranged side by side as seen in side and plan views will be referred to as the front-rear direction. Note that the blower fan 7 and the heat exchanger 9 are omitted from the side view to simplify the explanation.

[0014] In this embodiment, one supply port 8 is provided at the bottom of the wall on the front side of the container 4. This supply port 8 is connected to a supply duct 11, and a blower fan 7 is disposed in this supply duct 11. In other words, the blower fan 7 is provided outside the container 4, and forms a flow of a cooling medium for cooling the inside of the container 4 and supplies the cooling medium into the container 4.

[0015] A plurality of exhaust ports 10 are provided on the upper part of the wall on the side surface side of the container 4. In this embodiment, four exhaust ports 10 are provided, and each is connected to an exhaust duct 12. Each of the exhaust ducts 12 is connected to a heat exchanger 9. Although a detailed description is omitted, the heat exchanger 9 includes a pipe (not shown) through which the cooling medium flows and a fin (not shown) provided on the surface of the pipe, and cools the cooling medium by exchanging heat between the cooling medium flowing through the pipe and the outside air. Note that the number of exhaust ports 10 and the number of heat exchangers 9 are merely examples and are not limited thereto.

[0016] In this embodiment, dry air with a pressure higher than atmospheric pressure is assumed as the cooling medium. This cooling medium circulates between the container 4 and each heat exchanger 9 as shown by the arrow F. At this time, the inside of the container 4 is airtightly divided by a partition plate 13 into a lower space 4A connected to the supply port 8 and an upper space 4B connected to the discharge port 10 as shown in FIG. 1. This partition plate 13 is supported from below by a plurality of partition plate supports 14 arranged below it as shown in FIG. 3.

[0017] Now, when increasing the capacity and voltage of the molded type stationary induction machine 1 having such a configuration, it is required to efficiently cool the inside of the container 4. For that purpose, as shown in FIG. 3, an air tunnel 15 is provided inside the container 4, located on the upper surface of the partition plate 13 and covering the periphery of the winding 3. This air tunnel 15 is for concentrating the flow of the cooling medium to the winding 3.

[0018] 4, partition plate 13 separating lower space 4A from upper space 4B has a window 16 that is larger than the outer shape of winding 3 (here, the diameter of winding 3) and connects lower space 4A to upper space 4B. Window 16 is formed below each winding 3 and is sized to be positioned inside air tunnel 15 in plan view.

[0019] 3, partition plate 13 is formed in an L-shape in cross section, one side of which is attached to the inner wall of container 4 and the other side of which extends toward the inside of container 4. Partition plate 13 is placed on a side of mounting member 17, and fixed by, for example, an insulating bolt. Mounting member 17 is provided with a packing (not shown), and when partition plate 13 is placed on mounting member 17, the gap between partition plate 13 and mounting member 17 is airtightly sealed. As a result, the cooling medium from lower space 4A flows through window portion 16, gap (G) of winding 3, outside winding 3, and internal flow path 6.

[0020] The diameter of this window portion 16 is set to approximately equal to the diameter of the winding 3 plus the width of the internal flow path 6. The diameter of the air tunnel 15 is set to approximately the same size as the diameter of the window portion 16, that is, to a size that provides a gap between the winding 3 and the winding 3 that is approximately the same width as the internal flow path 6. This is because, in this embodiment, dry air is assumed to be the cooling medium, and it is assumed that a relatively large amount of dry air will flow in places where there is little pressure loss.

[0021] In other words, it is expected that as the gap between the winding 3 and the air tunnel 15 becomes larger, the flow rate of the cooling medium flowing through the gap will relatively increase, while the flow rate of the cooling medium flowing through the internal flow passage 6 will relatively decrease. For this reason, the window portion 16 and the air tunnel 15 are set to the above size so that the flow rate of the cooling medium outside the winding 3 and the flow rate of the cooling medium flowing through the internal flow passage 6 are approximately equal.

[0022] The partition plate 13 is formed to a size that allows it to be placed inside the container 4 and to divide the inside of the container 4. Specifically, the partition plate 13 is rectangular in plan view as shown in Fig. 4, and is formed so that the length (L1) of the long side in the left-right direction shown in the figure is slightly shorter than the length in the front-rear direction inside the container 4, and the length (L2) of the short side in the up-down direction shown in the figure is slightly shorter than the width in the left-right direction inside the container 4. The partition plate 13 is formed from an insulating material having heat resistance and insulating properties, such as a phenol resin laminate.

[0023] At this time, each window portion 16 is formed so that its center in the vertical direction coincides with the center of the partition plate 13 in the vertical direction in the figure. The central window portion 16 is formed so that its center is located in the center of the partition plate 13 in the horizontal direction in the figure, and the other window portions 16 are formed so that their centers are located equidistant from the center of the central window portion 16. In other words, the partition plate 13 has a symmetrical shape in the horizontal direction and the vertical direction in the figure when viewed from above.

[0024] The partition plate 13 has cut portions 13A formed in a plurality of locations, which connect from the window portions 16 to the outer edge. In the present embodiment, the partition plate 13 has cut portions 13A formed in the center of each of the two long sides and the center of each of the two short sides, which connect to the nearest window portion 16. Since the adjacent window portions 16 are connected as described above, the partition plate 13 is formed of a combination of four plate members 18 that can be separated at the cut portions 13A and the window portions 16.

[0025] 1 outside the container 4 and then installed inside the container 4. This makes it possible to place the partition plate 13 inside the container 4 with the iron core 2 passing through the center of the window 16. This makes it easy to place the partition plate 13 having the window 16 in a predetermined position.

[0026] In addition, the partition plate 13 is symmetrical in the vertical and horizontal directions in the plan view. Therefore, the plates 18 constituting the partition plate 13 can be made of plates having substantially the same shape. This makes it unnecessary to restrict the orientation or arrangement of the plates 18 during assembly, and it is sufficient to combine plate materials 18 that are substantially four pieces of the relatively large partition plate 13, which makes the assembly easier and reduces the labor required for inventory management.

[0027] 5, the wind tunnel 15 of this embodiment is formed by assembling a plurality of wall members 19 formed in a flat plate shape. Specifically, the length (L3) of the wall member 19 in the vertical direction shown in the figure is less than the height of the winding 3, and the length (L4) in the horizontal direction shown in the figure is slightly longer than 1 / 3 of the circumference of the wind tunnel 15. The thickness of the wall member 19 can be set appropriately within a range that allows it to be deformed into an arc shape or a cylindrical shape.

[0028] Each wall member 19 is molded into an arc shape as shown in the molded state, forming part of the air tunnel 15, and is assembled into a cylindrical shape with their ends overlapping as shown in the assembled state, thereby functioning as the air tunnel 15.

[0029] At this time, as shown in a plan view along line XA-XA in Fig. 6, the lower end side of each wall member 19 is fixed to the fixing member 20 on the upper surface of the partition plate 13, and the outer periphery side is supported by fixed supports 21, so that the wall members 19 are arranged on the upper surface of the partition plate 13 while maintaining their overall cylindrical shape. Note that Fig. 6 shows a schematic plan view along line XA-XA and line XB-XB in Fig. 3, but some components are not shown to simplify the explanation.

[0030] The fixing member 20 is formed in an L-shape as shown in the cross section along the line CC, and one side of the L-shape is fixed to the partition plate 13, and the other side of the L-shape is screwed to the outer periphery of the wall member 19 with an insulating bolt or the like, thereby fixing the lower end side of the wall member 19. Also, as shown in the cross section along the line DD, the fixing support 21 extends in the vertical direction with its lower end fixed to the partition plate 13, and supports the wall member 19 from the outer periphery side. This prevents the wall member 19 from returning to its original flat shape, and maintains the wall member 19 in a cylindrical shape as a whole. The wall members 19 are connected to each other at the overlapping portions by, for example, insulating bolts.

[0031] As shown in plan view along line BB, a flange plate 22 extending radially outward is disposed on the upper end of fixed support 21, and is connected to the flange plate 22 provided corresponding to the adjacent air tunnels 15 by connecting members 23. As a result, air tunnels 15 are disposed and fixed in a predetermined position on the upper surface of partition plate 13, in a predetermined positional relationship with respect to windings 3 and window portions 16, aligned in the axial direction of windings 3 with a predetermined gap between them.

[0032] By configuring the wind tunnel 15 by combining a plurality of wall members 19 in this way, even when the windings 3 are attached to the iron core 2, that is, even after the iron core 2 and the windings 3 are assembled in the state shown in Fig. 1, the wind tunnel 15 can be installed with the iron core 2 and the windings 3 arranged on its inner periphery. This makes it easy to place the wind tunnel 15 in a predetermined position. In addition, since the wind tunnel 15 can be formed using wall members 19 of the same shape, it is not necessary to limit the orientation or arrangement of the plate materials 18 during assembly, which makes the work easy and also reduces the effort required for inventory management.

[0033] Incidentally, it is believed that the provision of air tunnel 15 enables the cooling medium to flow intensively around winding 3 in upper space 4B. Meanwhile, in molded type stationary induction device 1, blower fan 7 for forming a flow of the cooling medium is provided outside container 4. In this case, lower space 4A is a space partitioned by partition plate 13, and its area in a plan view is approximately equal to the area of ​​partition plate 13.

[0034] Therefore, in order to allow the cooling medium to flow more efficiently toward the windings 3, it is important to direct the flow of the cooling medium in lower space 4A toward each of the windows 16. This is a problem that did not need to be considered in the conventional configuration in which blower fan 7 is disposed inside container 4 and the cooling medium can be directed directly toward windings 3, for example, from directly below windings 3, and it can be said that this is a new issue that has arisen by providing blower fan 7 outside container 4.

[0035] Furthermore, in consideration of the objective of increasing the voltage of the molded type stationary induction device 1, there is a further problem: when the molded type stationary induction device 1 is increased in voltage, it is necessary to ensure a sufficient creepage insulation distance between the partition plate 13 and the partition plate support 14 and the metal members present inside the container 4.

[0036] Here, the object for which it is necessary to ensure the creepage insulation distance may be a metal member disposed in the container 4. In the case of a molded type static induction device 1, the metal members are assumed to be the iron core 2 and the windings 3. In the case of this embodiment, the metal members may include a lower die 24 that fixes the lower end yoke portion 2b of the iron core 2, an upper die 25 that fixes the upper end yoke portion 2c of the iron core 2, and a winding support 26 that supports the windings 3 from below and above, as shown in FIG.

[0037] The lower die 24 has a lower base that is fixed to the bottom surface of the container 4, and a lower wall that rises from the lower base and sandwiches the iron core 2 from the left and right. The upper die 25 has an upper base that covers the top of the iron core 2, and an upper wall that rises down from the upper base and sandwiches the iron core 2 from the left and right. The lower die 24 and upper die 25 are formed of a metal material.

[0038] 7, the winding support 26 is composed of a contact portion 26A made of an insulating material and a columnar support portion 26B made of a metal material. The contact portion 26A is generally rectangular parallelepiped, and one surface of the contact portion 26A has a recess that is recessed inward, and one end of the support portion 26B is disposed in the recess. One end of the support portion 26B is fixed to the lower base or the upper base, and the overall length of the support portion 26B is adjustable.

[0039] As shown in the supported state, with one end of support portion 26B disposed in the recess, the surface of winding support 26 opposite the recess comes into contact with the lower end of winding 3, and the overall length of support portion 26B is adjusted to support winding 3. At the upper end side of winding 3, contact portion 26A comes into contact with the upper end of winding 3, and winding 3 is supported by adjusting the overall length of support portion 26B fixed to upper base 25A.

[0040] As shown in a plan view, the winding supports 26 are arranged at equal intervals in the circumferential direction of the winding 3 to support the outer circumferential winding 3B and the inner circumferential winding 3A. The four winding supports 26 arranged radially outward support the outer circumferential winding 3B, and support the contact portion 26A with two support portions 26B. Note that in Fig. 7, some components are not shown to simplify the explanation.

[0041] On the other hand, the four winding supports 26 arranged on the radially inner side support the inner circumferential winding 3A, and support the contact portion 26A with one support portion 26B. For this reason, the contact portions 26A have different outer shapes and recessed portions in size according to the number of support portions 26B. The winding supports 26 on the upper end side of the winding 3 are arranged in a similar manner.

[0042] Partition plate 13 and partition plate support 14 are disposed at positions that ensure a creepage insulation distance from these metal members. Specifically, as shown in Fig. 3, partition plate 13 is disposed so as to be located below the lower end of winding 3 in the vertical direction and within the vertical range of contact portion 26A of winding support 26. In other words, partition plate 13 is disposed so that winding support 26 appears to pass through window portion 16, or more strictly speaking, so that contact portion 26A passes through window portion 16.

[0043] Incidentally, as described above, the partition plate 13 is formed to have a size that is approximately the same area as the area of ​​the inside of the container 4 in a plan view. Also, the partition plate 13 has a plurality of window portions 16 formed therein, each of which has an area that is relatively large compared to the area of ​​the partition plate 13 in a plan view. Therefore, even if the partition plate 13 is supported at its outer edge by the mounting member 17, the size of the partition plate 13 and the presence of the window portions 16 may cause the partition plate 13 to bend under its own weight.

[0044] If the partition plate 13 is bent, the distance between the partition plate 13 and the support portion 26B of the winding support 26 becomes short, and there is a risk that the creepage insulation distance will not be ensured. Therefore, it becomes necessary to support the partition plate 13 from below by the partition plate support 14, but since a plurality of winding supports 26 are arranged below the winding 3, it is also necessary to ensure the creepage insulation distance between these winding supports 26 and the partition plate support 14. The creepage insulation distance is set appropriately based on the specifications of the molded type static induction device 1.

[0045] Therefore, as shown in a plan view in Fig. 8, the partition plate supports 14 are disposed around the window portion 16 at positions where a predetermined creepage insulation distance is ensured from the support portion 26B shown by the dashed line. Specifically, each partition plate support 14 is disposed such that the distance to the nearest support portion 26B is equal to or greater than the required creepage insulation distance. Note that, as will be described in detail later, in Fig. 8, the partition plate supports 14A and 14B, which have different shapes, are shown with different hatching.

[0046] As seen in this plan view, the partition plate supports 14A disposed above and below the window portion 16 are arranged such that their longitudinal direction is aligned with the cooling medium supply direction indicated by the arrow F. The partition plate support 14A on the right end side, which is farthest from the supply port 8, is arranged such that its longitudinal direction faces the supply direction. The partition plate support 14B is arranged between the supply port 8 and the window portion 16 on the right end side such that its longitudinal direction faces the supply direction.

[0047] This makes it possible to support partition plate 13 over a wider range, and is considered to reduce the risk of bending partition plate 13. In other words, by supporting partition plate 13 at the outer edge on the container 4 side and at the side close to window portion 16, bending of partition plate 13 can be suppressed.

[0048] Now, by arranging the partition supports 14 as described above, it is believed that there will be no problem with insulation between the partitions 13 and the partition supports 14. However, in this embodiment, since the blower fan 7 is provided outside the container 4, further measures are taken to improve cooling performance.

[0049] When the partition plate support 14 is oriented and positioned as described above when viewed in a plane, it is believed that the cooling medium supplied from the left side of the figure can be rectified toward the window portions 16 by restricting the flow of the cooling medium supplied from the left side of the figure in the vertical direction, i.e., in the left-right direction of the container 4, at the position of each window portion 16, and by restricting the flow to the right at the right end side of the figure.

[0050] On the other hand, the cooling medium supplied from the left side in the figure also needs to be supplied to the window portion 16 on the right side in the figure. In this case, since the partition plate support 14B is disposed facing the direction of the flow of the cooling medium, there is a risk that the flow from the supply port 8 to the window portion 16 on the right side in the figure will be obstructed.

[0051] Therefore, in this embodiment, the partition plate support 14A is formed in a flat plate shape to provide a straightening function, as shown in Fig. 9 as a flat plate shape, and the partition plate support 14B is formed in a frame shape to allow the cooling medium to pass through, as shown in Fig. 9 as a frame shape. As a result, as shown in side view and front view, for the cooling medium supplied from the left side in the figure, at the positions of the window portions 16, the flow of the cooling medium in directions other than toward the window portions 16 can be suppressed, and the risk of obstructing the flow of the cooling medium from the supply port 8 to the window portions 16 can be reduced.

[0052] In other words, the cooling medium in the lower space 4A can be concentrated and directed toward the window portion 16, thereby ensuring cooling performance and also ensuring the surface insulation distance between the partition plate 13 and the partition plate support 14 and the metal members.

[0053] According to the above-described molded type stationary induction device 1, the following effects can be obtained. The molded type stationary induction device 1 includes an iron core 2, a plurality of cylindrical windings 3 attached to the iron core 2, and a container 4 housing the iron core 2 and the windings 3. A supply port 8 is formed on the lower side of the container 4 for supplying a cooling medium to the inside of the container 4 by a blower fan 7 provided outside the container 4, and a discharge port 10 is formed on the upper side for discharging the cooling medium from the inside of the container 4 to a heat exchanger 9 provided outside the container 4.

[0054] Inside this container 4, there are a partition plate 13 that airtightly divides the inside of the container 4 into a lower space 4A connected to a supply port 8 and an upper space 4B connected to a discharge port 10, a plurality of partition plate supports 14 that are arranged below the partition plate 13 and support the partition plate 13 from below, and a wind tunnel 15 that is arranged on the upper surface of the partition plate 13 and covers the periphery of the winding 3.

[0055] The partition plates 13 are located below each winding 3, connect the lower space 4A and the upper space 4B, and each have a window portion 16 formed therein that is larger than the outer shape of the winding 3. The partition plate support 14 supports the partition plate 13 at a predetermined surface insulation distance from the metal members arranged in the container 4, while suppressing deflection of the partition plate 13 in which the multiple window portions 16 are formed.

[0056] As a result, in the molded type static induction device 1, which requires cooling performance and insulation to achieve higher voltages and larger capacities, it is possible to allow the cooling medium to flow concentratedly to the windings 3 by the air tunnel 15, and it is possible to support the partition plate 13 by the partition plate support 14 while ensuring a creepage insulation distance from the metal member, thereby improving insulation while ensuring cooling performance.

[0057] Furthermore, in the molded type stationary induction device 1, the partition plate support 14 is disposed at a position spaced a predetermined creepage insulation distance from the metal member, thereby ensuring insulation.

[0058] In addition, in the molded type stationary induction device 1, at least one of the partition plate supports 14 is formed in a frame shape through which the cooling medium can pass. This reduces the risk of blocking the flow of the cooling medium, and suppresses the deterioration of the cooling performance. This is particularly effective in the configuration in which the blower fan 7 is disposed outside the container 4 and the cooling medium is supplied from one supply port 8 as in the embodiment.

[0059] Furthermore, molded type static induction device 1 includes winding support 26 that supports winding 3 from below, and winding support 26 is composed of supporting portion 26B formed in a columnar shape from a metal material and contact portion 26A formed from an insulating material and positioned between supporting portion 26B and winding 3 and in contact with said winding 3. Partition plate 13 is supported by partition plate support 14 below the lower end of winding 3 and above the lower end of contact portion 26A in the vertical direction of container 4. This ensures a creepage insulation distance between partition plate 13 and the metal member (here, winding 3 and supporting portion 26B).

[0060] Furthermore, in the molded type stationary induction device 1, the partition plate 13 is formed of a plurality of plate materials 18 that are cut from the window portions 16 to the outer edge in a plurality of places, making it possible to disassemble and assemble the partition plate 13. This makes it possible to dispose the partition plate 13 in the container 4 with the iron core 2 passing through the center portion of the window portion 16, even when, for example, the iron core 2 and the windings 3 are assembled outside the container 4 and then installed inside the container 4. Furthermore, since it is only necessary to combine plate materials 18 of a size obtained by dividing a relatively large partition plate 13, the installation work of the partition plate 13 can be easily performed, such as disposing the partition plate 13 having the window portion 16 in a predetermined position.

[0061] In addition, in the molded type stationary induction device 1, the wind tunnel 15 is formed by forming the plate-like wall member 19 into a cylindrical or arc shape. As a result, even if the iron core 2 and the windings 3 are assembled outside the container 4 in the state shown in FIG. 1 and then installed inside the container 4, the wind tunnel 15 can be assembled with the iron core 2 and the windings 3 positioned on the inner periphery side, making the installation work of the wind tunnel 15 easy.

[0062] Furthermore, the molded type stationary induction device 1 may have partition plate 13 and partition plate support 14 of other configurations. For example, as shown in Fig. 10 as another configuration example 1, partition plate 13 may be configured to be divided into two in the vertical direction in the figure. As described above, the size of window portion 16 is set based on the size of winding 3, so depending on the size of winding 3, it is expected that each window portion 16 may not be connected.

[0063] In this case, by providing a cut portion 13A in a manner that connects from the outer edge on the left end side in the figure through the window portion 16 to the outer edge on the right end side in the figure at the center in the vertical direction in the figure, the partition plate 13 can be installed so that the iron core 2 passes through the center portion of the window portion 16 even after the iron core 2 and the windings 3 are assembled. In this case, because the partition plate 13 is composed of two plate materials 18A of substantially the same shape, the risk of confusion during assembly is reduced, improving workability and reducing the effort required for inventory management.

[0064] As shown in Fig. 10 as another example of the configuration 2, the partition plate 13 can be configured to have a cut portion 13A in the center of each window portion 16, which is in the vertical direction in the figure. In this case, the two plate materials 18B at both ends in the figure can be made the same shape, and the two plate materials 18C in the center can also be made the same shape. Furthermore, the plate materials 18B and the plate materials 18C are clearly shaped so that the difference in shape can be clearly and reliably recognized by the eye when the worker works. This reduces the risk of confusion during assembly, improves workability, and also reduces the effort required for inventory management.

[0065] 10 as another configuration example 3, a configuration can be adopted in which a partition plate support 14C formed into an overall T-shape is used, and the upper side of the T supports the partition plate 13. With such a configuration, the range over which the partition plate 13 is supported can be widened, and even when multiple partition plates are arranged, the flow of the cooling medium can be prevented from being obstructed, thereby improving insulation while ensuring cooling performance.

[0066] Although not shown in the drawings, the wind tunnel 15 can be formed by molding one wall member 19 into a cylindrical shape, or can be formed by two or four or more wall members 19. That is, the number of wall members 19 in the wind tunnel 15 is not limited as long as the wall member 19 is formed by molding a plate-like wall member 19 into a cylindrical shape or a partial arc shape of a cylindrical shape.

[0067] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0068] In the drawings, reference numeral 1 denotes a molded type static induction device, 2 denotes an iron core (metal member), 3 denotes a winding (metal member), 4 denotes a container, 4A denotes a lower space, 4B denotes an upper space, 7 denotes a blower fan, 8 denotes a supply port, 9 denotes a heat exchanger, 10 denotes an exhaust port, 13 denotes a partition plate, 13A denotes a cutting portion, 15 denotes an air tunnel, 16 denotes a window portion, 18 denotes a plate material, 19 denotes a wall member, 24 denotes a lower mold (metal member), 25 denotes an upper mold (metal member), 26 denotes a winding support (metal member), and 26B denotes a support portion (metal member).

Claims

1. Iron core and A plurality of cylindrical windings attached to the iron core; a container that houses the iron core and the winding; a supply port formed on a lower side of the container for supplying a cooling medium to an inside of the container by a blower fan provided outside the container; an outlet formed on an upper side of the container for discharging a cooling medium from inside the container to a heat exchanger provided outside the container; a partition plate disposed inside the container and airtightly dividing the inside of the container into a lower space connected to the supply port and an upper space connected to the discharge port; A plurality of partition plate supports are disposed below the partition plate and support the partition plate from below; an air tunnel disposed on an upper surface of the partition plate and surrounding the winding; the partition plate is located below each of the windings, connects the lower space and the upper space, and has a window portion formed therein that is larger than an outer shape of the winding, The partition plate support is a molded static induction device that supports the partition plate at a predetermined surface insulation distance from a metal member arranged in the container, while suppressing deflection of the partition plate in which the multiple window portions are formed.

2. 2. The molded static induction device according to claim 1, wherein the partition plate support is disposed at a position spaced a predetermined creepage insulation distance from the metal member.

3. 3. The molded type stationary induction device according to claim 1, wherein at least one of the plurality of partition plate supports is formed in a frame shape through which a cooling medium can pass.

4. a winding support that supports the winding from below, the winding support is composed of a support portion formed in a columnar shape from a metal material and a contact portion formed from an insulating material, the contact portion being positioned between the support portion and the winding and in contact with the winding, 4. The molded type stationary induction device according to claim 1, wherein the partition plate is supported by the partition plate support below a lower end of the winding and above a lower end of the contact portion.

5. The molded stationary induction device according to any one of claims 1 to 4, wherein the partition plate is formed from a plurality of plates cut from the window portion to the outer edge in a plurality of places, and is capable of being disassembled and assembled.

6. 6. The molded stationary induction device according to claim 1, wherein the wind tunnel is formed by molding a plate-like wall member into a cylindrical or arcuate shape.

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