Static Device

Abstract

To provide a stationary device capable of securing insulation while absorbing an individual difference of coils.SOLUTION: A stationary device 1 comprises: an iron core 3 including a plurality of legs 31 and a yoke part connecting the legs 31; coils 4 mounted to the legs 31; and insulating flanges 6 provided in ends of the coils 4 at a yoke side and including flange parts 61 covering the ends of the coils 4 in an axial direction. The insulating flange 6 is formed by disposing a plurality of split pieces 7 in a split mode in a circumferential direction in a state where an end of each split piece 7 in the circumferential direction overlaps the other adjacent split piece 7.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] FIELD OF THE INVENTION An embodiment of the present invention relates to a stator. [Background technology]

[0002] BACKGROUND ART Conventionally, static induction devices such as transformers and reactors in which a winding is attached to an iron core have been known, as shown in Patent Document 1. Hereinafter, static induction devices will be referred to as static devices. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-135434 Summary of the Invention [Problem to be solved by the invention]

[0004] In such static devices, it is necessary to ensure insulation between the windings and the core, so an insulating flange may be provided, for example, between the axial end of the core and the yoke of the core. In this case, the dimensions of the windings formed by winding conductors, such as their diameter and height, are determined by specifications.

[0005] However, depending on the specifications, the diameter of the windings can exceed several tens of centimeters, and although this is within the allowable range of the specifications, there can be so-called individual differences, such as slight differences in the outer and inner diameters.

[0006] Therefore, a static device is provided that can absorb the individual differences in windings while ensuring insulation. [Means for solving the problem]

[0007] The static device of the embodiment includes an iron core having a plurality of legs and a yoke portion connecting the legs, a winding formed by winding a conductor and attached to the legs, and a coil for winding the winding. Yorkand an insulating flange provided at the end of the winding on the side of the winding and having a flange that covers the axial end of the winding, the insulating flange being formed by arranging a plurality of segments that are divided in the circumferential direction so that the circumferential end of each segment overlaps with the adjacent segment. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a static device according to a first embodiment; [Figure 2] A diagram showing a schematic example of the winding configuration [Figure 3] A diagram showing the general shape of an insulating flange [Figure 4] Schematic diagram showing the structure of the divided pieces [Figure 5] A diagram showing an example of the arrangement of divided pieces [Figure 6] FIG. 10 is a diagram showing a schematic view of overlapping of divided pieces; [Figure 7] FIG. 10 is a diagram showing a typical example of absorbing individual differences using an insulating flange. [Figure 8] FIG. 10 is a diagram illustrating a configuration of an inner peripheral segment according to a second embodiment. [Figure 9] 1 is a diagram showing the schematic shape of an inner flange; [Figure 10] Diagram 1 showing another example of the insulating flange configuration [Figure 11] Diagram 2 showing another example of the insulating flange configuration [Figure 12] FIG. 10 is a diagram schematically illustrating another arrangement of the insulating flange. [Figure 13] 1 is a diagram schematically illustrating an example of the configuration and arrangement of an auxiliary insulating member; [Figure 14] 10A and 10B are diagrams schematically showing other configuration examples and arrangements of insulating flanges; DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, several embodiments will be described with reference to the drawings. Furthermore, parts that are substantially common to the embodiments will be denoted by the same reference numerals.

[0010] (First embodiment) A first embodiment will be described below. As shown in Fig. 1, the main part of the static device 1 of this embodiment has an iron core 3 disposed in a container 2, and a winding 4 attached to the iron core 3. For simplicity of explanation, Fig. 1 does not show components such as bushings and wiring that are generally provided in the static device 1. In the following explanation, the up-down direction in the drawing is taken to be the up-down direction. The up-down direction is also the axial direction of the winding 4.

[0011] In this embodiment, the iron core 3 is formed by three legs 31 on which the windings 4 are attached, an upper yoke 3b connecting the upper ends of the legs 31, and a lower yoke 3c connecting the lower ends of the legs 31. The iron core 3 is fixed to the container 2 on the upper yoke 3b side and the lower yoke 3c side by fixing members such as clamps (not shown).

[0012] 2, the winding 4 is composed of an outer winding 41 and an inner winding 42 that is concentrically arranged on the inner periphery of the outer winding 41 with a predetermined gap 5 therebetween. The winding 4 has design reference values for the outer diameter (R1) of the outer winding 41, the inner diameter (R2) of the outer winding 41, the outer diameter (R3) of the inner winding 42, and the inner diameter (R4) of the inner winding 42, each of which has a predetermined tolerance range. The difference between the inner diameter (R2) of the outer winding 41 and the radius (R3) of the inner winding 42 is the gap length.

[0013] The outer circumferential winding 41 and the inner circumferential winding 42 are each formed by winding a conductor 4a shown in Fig. 6 described below, and are supported from the lower end by a lower end support member (not shown) and from the upper end by an upper end support member (not shown), with a predetermined gap between them and the legs 31. The conductor 4a of the winding 4 is also wound in the circumferential direction, and a gap (S1) is formed inside the winding 4 between adjacent circumferential conductors 4a that continues to both ends in the axial direction.

[0014] 1, an insulating flange 6 made of an insulating material is provided on the upper end side of the winding 4. In this embodiment, this insulating flange 6 is intended to be provided on the end of the outer winding 41, and as shown in a schematic plan view and a schematic side view with a portion cut away within the range indicated by the two-dot chain line in FIG. 3, the insulating flange 6 generally has a flange portion 61 that is roughly annular with a predetermined thickness (T1), and a body portion 62 that extends downward from the inner periphery of the flange portion 61 and is roughly cylindrical with a predetermined thickness (T2).

[0015] The term "general shape" used here refers to the overall shape of the insulating flange 6 when it is formed by combining segments 7 that are circumferentially separated, as will be described later. Hereinafter, an insulating flange 6 formed by combining a plurality of segments 7 will also be referred to as a "segmented type" for convenience.

[0016] The insulating flange 6 is disposed in a position where the flange 61 covers the upper end of the outer peripheral winding 41, and the body 62 is disposed within the gap 5. This ensures insulation at the upper end of the outer peripheral winding 41 and insulation between the outer peripheral winding 41 and the inner peripheral winding 42 at the corners of the upper end.

[0017] In this case, the overall length of the flange portion 61, i.e., the overall outer diameter (R10) of the insulating flange 6, is set to be approximately equal to the outer diameter (R1) of the reference outer peripheral winding 41. In addition, the outer diameter (R11) of the body portion 62 is set to be approximately equal to or slightly larger than the inner diameter (R2) of the reference outer peripheral winding 41. Therefore, a gap (S2) of approximately the size obtained by subtracting the thickness of the body portion 62 from the gap length is formed between the body portion 62 and the inner peripheral winding 42, and the gap extends from the bottom end to the top end of the winding 4.

[0018] The inner diameter (R12) of the body portion 62 is set to be smaller than the inner diameter (R2) of the reference outer peripheral winding 41 by at least the thickness (T2) of the body portion 62. In this embodiment, the thickness (T1) of the flange portion 61 and the thickness (T2) of the body portion 62 are set to approximately 3 mm. However, the thicknesses of the flange portion 61 and the body portion 62 can be set appropriately based on the required insulation properties, and can also be set to, for example, approximately 1 mm to 10 mm, or even more.

[0019] The overall thickness (T3) of the insulating flange 6, i.e., the approximate length of the body 62, can be set appropriately taking into account the size of the flange 61, etc., but it is desirable to set it to, for example, several times the thickness of the flange 61 or more, taking into account the overlapping of the ends of the segments 7 as will be described later. The insulating flange 6 also has holes formed in parts of its circumference for drawing out the conductors 4a.

[0020] Next, the operation of the above-described configuration will be described. As mentioned above, it is necessary to ensure insulation between the winding 4 and the iron core 3 in the stator 1. In this case, it is thought that providing the insulating flange 6 described above increases the insulation distance between the winding 4 and, for example, the upper yoke 3b of the iron core 3, thereby ensuring insulation.

[0021] However, the winding 4 formed by winding the conductor 4a may have a diameter exceeding several tens of centimeters, depending on the specifications, and in such cases, so-called individual differences may occur, such as slight variations in the outer and inner diameters, although these are within the allowable range of the specifications. Therefore, in this embodiment, it is possible to absorb the individual differences that occur in the winding 4 while ensuring insulation.

[0022] Specifically, the insulating flange 6 is formed by combining a plurality of segments 7 shown in Fig. 4. The segments 7 are formed by dividing a roughly circular shape in a plan view, indicated by an outer edge line (CL1) of diameter (R10) shown by a two-dot chain line and an inner edge line (CL2) of diameter (R12) also shown by a two-dot chain line, in the circumferential direction at a central angle (α). In this embodiment, the central angle (α) is set to 60 degrees, and the segments 7 are formed to have a size that appears to divide the insulating flange 6 equally into six segments in the circumferential direction. In this case, the number of segments is six.

[0023] That is, in this embodiment, the plurality of divided pieces 7 are formed into a single shape that is the same within a predetermined tolerance. However, the number of divisions and the divided form mentioned here are used to indicate the apparent shape in an easily understandable manner, and the divided pieces 7 in this embodiment are not formed by cutting or dividing an annular base material, but are each formed to the size of a single piece.

[0024] As shown in side view and three-dimensional perspective view from above, this segment 7 has a general fan shape along the circumferential direction, and has a plate-like portion 71 that forms an annular flange 61 when arranged adjacent to another segment 7, and a wall-like portion 72 that curves down from the inner periphery of the plate-like portion 71 and along the inner edge of the plate-like portion 71 to form a cylindrical body 62 when arranged adjacent to another segment 7. The plate-like portion 71 is formed with a thickness (T1), and the wall-like portion 72 is formed with a thickness (T2), and the overall thickness (T3) of the segment 7 can be set appropriately as described above.

[0025] 5, the insulating flange 6 is formed by arranging a plurality of segments 7 (here, one segment 7 having an outlet hole 8 and six segments 7 not having an outlet hole 8, a total of seven segments 7a to 7g) in the circumferential direction with adjacent circumferential ends overlapping each other. That is, the insulating flange 6 is formed by arranging seven segments 7, which is greater than the number of segments obtained by dividing a roughly shaped member, six in this case.

[0026] As a result, as shown in Fig. 5 after assembly, a larger number of segments 7 than the number of segments are arranged in the circumferential direction, forming an insulating flange 6 having a roughly circular flange portion 61 formed by adjacent plate-like portions 71 and a body portion 62 formed by adjacent wall-like portions 72 in a manner that extends downward from the inner edge of the flange portion 61. Note that in Fig. 5, the radial deviation of each segment 7 is intentionally enlarged in order to show the arrangement of the segments 7.

[0027] 6, the assembled insulating flange 6 is in a state in which adjacent segments 7d and 7e, for example, overlap in the radial direction, that is, in the thickness direction of the wall-like portion 72, and segment 7d contacts the inner circumferential surface of the outer peripheral winding 41. This makes it possible to easily position the segments 7, which are separated in the circumferential direction, in the radial direction when assembling them, thereby greatly improving work efficiency.

[0028] Furthermore, segment 7d and segment 7e overlap within a predetermined range (X) as shown in side view VIb in the axial direction, that is, in the thickness direction of plate-like portion 71. As a result, the length of the path from outer peripheral winding 41 to the top of segment 7e, that is, the creepage distance from outer peripheral winding 41 to the upper surface of insulating flange 6, is the sum of the thickness of segment 7d at the left end in the figure, the length of range (X), and the thickness of segment 7d at the right end in the figure, thereby improving the insulation at the ends of each segment 7d.

[0029] Furthermore, where the segments 7 overlap, for example, segment 7d is in a state where the end on the segment 7e side is in general contact with the upper end of the outer peripheral winding 41, while segment 7e is arranged with a gap (S3) formed between it and the upper end of the outer peripheral winding 41. Similarly, as shown in side view VIc, where segment 7a and segment 7g overlap, for example, a gap (S3) is also formed between segment 7g and the upper end of the outer peripheral winding 41.

[0030] The gaps (S3) are formed at the portions of the outer winding 41 where the segment pieces 7 overlap, that is, at the upper end of the winding 4, and are generally uniform in the circumferential direction. Therefore, some of the gaps (S1) formed inside the winding 4 and capable of serving as refrigerant flow paths have gaps (S3) at the upper end, and the ends are not blocked.

[0031] Furthermore, because the insulating flange 6 is formed from the segments 7, it is possible to adjust the overlapping of the segments 7 in the circumferential direction and the position of the segments 7 in the radial direction. This makes it possible to arrange the segments 7 on the outer circumferential winding 41 with an outer diameter of R20, as shown in Arrangement Shape Example 1 in Fig. 7, and also makes it possible to arrange the segments 7 on other outer circumferential windings 41 with individual differences, as shown in Arrangement Shape Example 2. In this way, by making the insulating flange 6 a segmented type, it is possible to arrange the outer circumferential winding 41 so that it covers the end, even if there are individual differences in the outer shape and inner diameter.

[0032] According to the embodiment described above, the following effects can be obtained. The static device 1 includes an iron core 3 having a plurality of legs 31 and a yoke portion connecting the legs 31, a winding 4 attached to the legs 31, and a coil 4 York and an insulating flange 6 having a flange 61 provided at the end of the winding 4 and covering the axial end of the winding 4. The insulating flange 6 is formed by arranging a plurality of segments 7 that are divided in the circumferential direction so that the circumferential end of each segment 7 overlaps with the adjacent segment 7.

[0033] As a result, even if there are individual differences in the outer shape of the windings 4, by changing the arrangement of the segments 7, it is possible to arrange the insulating flange 6 so that it covers the ends of windings 4 of different shapes. Therefore, it is possible to ensure insulation while absorbing the individual differences in the windings 4.

[0034] Furthermore, segment 7 of stator 1 has plate-like portion 71 that extends circumferentially around the axial end of winding 4 and forms flange portion 61 when arranged, and wall-like portion 72 that rises down from the radial end of plate-like portion 71 and curves along the end of plate-like portion 71 and forms body portion 62 when arranged, with plate-like portion 71 covering the end of winding 4 and wall-like portion 72 arranged along the side of winding 4.

[0035] This ensures insulation of the corners at the upper end of the winding 4, and also makes it possible to perform assembly work with the wall-shaped portion 72 in contact with the side surface of the winding 4, making it easy to position each segment 7 radially, thereby greatly improving work efficiency.

[0036] The stator 1 also includes an outer circumferential winding 41 and an inner circumferential winding 42 disposed on the inner circumferential side of the outer circumferential winding 41 with a predetermined gap 5 therebetween, and the wall-like portion 72 of the divided piece 7 is formed at the end of the plate-like portion 71 on the gap 5 side in the radial direction, positioned within the gap 5. This makes it possible to ensure insulation between the windings 4 at the corners at the upper ends of the outer circumferential winding 41.

[0037] Furthermore, since the wall-like portion 72 of the stator 1 is located within the gap 5, that is, in this embodiment, the stator 1 is inserted into the gap 5, the upper end of the gap 5 is not blocked by the insulating flange 6. This makes it possible to prevent the flow of refrigerant, such as dry air or cooling oil, in the gap 5 from being blocked by the insulating flange 6, thereby ensuring cooling performance.

[0038] Furthermore, in the stator 1 of this embodiment, a gap (S3) is formed between the end of the segment 7 and the upper end of the winding 4, so the gap (S1) formed inside the winding 4 is not completely blocked by the insulating flange 6. This allows the refrigerant to flow inside the winding 4, preventing an excessive decrease in cooling performance.

[0039] Furthermore, in the stationary member 1, the segments 7 are formed to a size that divides the insulating flange 6 equally in the circumferential direction, and a greater number of segments than the number of segments are arranged in the circumferential direction to form the insulating flange 6. This allows the insulating flange 6 to be formed using segments 7 of a single shape, reducing the risk of mistakes such as misplacing the segments 7 when arranging them. Furthermore, because the insulating flange 6 can be formed using a single-shaped member, increases in manufacturing costs and member management costs can be suppressed.

[0040] (Second embodiment) The second embodiment will be described below, which describes other configurations and arrangements of the insulating flange 6 described in the first embodiment.

[0041] <Configuration example 1> In the first embodiment, the insulating flange 6 is provided on the outer peripheral winding 41, but it is also possible to provide the insulating flange 6 on the inner peripheral winding 42, or to provide the insulating flanges 6 on both the outer peripheral winding 41 and the inner peripheral winding 42. Hereinafter, the insulating flange 6 disposed on the inner peripheral winding 42 will be referred to as the inner peripheral flange 16.

[0042] As shown in Figure 8, the inner flange 16 is formed by using multiple inner divided pieces 17, which are roughly circular in shape in a plan view, indicated by an outer edge line (CL3) of diameter (R30) shown by a two-dot chain line and an inner edge line (CL4) of diameter (R31) shown by a two-dot chain line, divided circumferentially at a central angle (β).

[0043] In this case, the diameter (R30) of the outer edge is set to be approximately equal to the sum of the outer shape (R3) of the inner winding 42 and the thickness (T32) of the wall-like portion 172, and the diameter (R31) of the inner edge is set to be approximately equal to the inner diameter (R4) of the inner winding 42. The thickness (T31) of the plate-like portion 171 and the overall thickness (T33) of the segment 7 can be set as appropriate, for example, to be the same as the insulating flange 6 provided on the outer winding 41.

[0044] Furthermore, the inner peripheral segment 17 has a central angle (β) set to, for example, 60 degrees, and is formed in a manner in which it is divided equally in the circumferential direction. In this case, the number of divisions is 6. In other words, the inner peripheral segment 17 can be formed into a single shape formed to have the same shape within a predetermined tolerance range. However, the number of divisions and the divided form mentioned here are used to indicate the apparent shape in an easy-to-understand manner, and in this embodiment, the inner peripheral segment 17 is not formed by cutting or dividing an annular base material, but is formed as a single piece.

[0045] The inner circumference side split piece 17 formed in this manner, as shown in a side view and a three-dimensional oblique view from above, has a roughly fan-shaped shape that follows the circumferential direction, and has a plate-shaped portion 171 that forms a circular flange portion 161 when placed adjacent to other inner circumference side split pieces 17, and a wall-shaped portion 172 that extends downward from the outer periphery of the plate-shaped portion 171 and curves along the outer edge of the plate-shaped portion 171, and forms a cylindrical body portion 162 when placed adjacent to other inner circumference side split pieces 17.

[0046] 9, a total of seven segments 7, including one inner segment 17 with an inner outlet hole 18 formed therein and six inner segment pieces 17 without an inner outlet hole 18 formed therein, are arranged in the circumferential direction with the wall-like portions 172 in contact with the outer peripheral surface of the inner winding 42 and with their circumferential ends overlapping with adjacent segments 7, similar to the insulating flange 6, to form the inner flange 16 having a flange portion 161 and a body portion 162. In other words, the inner flange 16 is formed by arranging inner segment pieces 17 in a number greater than the number of segments, which is six in this case. In this case, the insulating flange 6 can also be provided.

[0047] By using the inner flange 16 having such a configuration, even if there are individual differences in the outer shape of the inner winding 42, by changing the arrangement of the inner segment pieces 17, the inner flange 16 can be arranged to cover the ends of inner windings 42 of different shapes, thereby achieving various effects similar to those of the insulating flange 6 described above, such as ensuring insulation while absorbing individual differences.

[0048] Furthermore, since the wall portion 172 of the inner flange 16 is also located within the gap 5, that is, in the above example, it is inserted into the gap 5, it is possible to prevent the flow of refrigerant in the gap 5 from being blocked by the inner flange 16. Also, in the case of the inner segment 17, a gap is formed between it and the upper end of the inner winding 42, which allows the refrigerant to flow inside the winding 4. This prevents excessive deterioration of cooling performance.

[0049] <Configuration example 2> The number of segments 7 that form the insulating flange 6 may be other than six. For example, as shown in FIG. 10 , the insulating flange 6 can be configured by setting the central angle (α) to 120 degrees and arranging three segments 7, which is greater than the number of segments, in the circumferential direction, for example, four, as shown as an arrangement mode. The apparent outer shape and inner diameter of the segments 7 can be set appropriately according to the size of the winding 4.

[0050] Even with this configuration, by changing the arrangement of the segments 7, the insulating flange 6 can be easily positioned even if there are individual differences in the outer shape of the winding 4, and the various effects described above can be obtained, such as ensuring insulation while absorbing individual differences in the winding 4.

[0051] Although not shown in the drawings, the insulating flange 6 can be formed using segments 7 with other numbers of divisions, such as 2, 4, 5, 7 or more. Furthermore, instead of arranging the segments 7 in the number of divisions + 1 as described above, the number of divisions can be arranged in the number of divisions + 2 or + 3. This also applies to the inner flange 16 described above.

[0052] However, although there is no intention to exclude this configuration, it is considered desirable to arrange the divided pieces 7 into approximately 3 to 7 divisions in a range of approximately the number of divisions + 1 to the number of divisions + 3, because increasing the number of divisions or the number of arrangements simply increases the work time, and because reducing the circumferential size may make it difficult to arrange the ends in an overlapping state, and because increasing the insulation can be achieved simply by increasing the thickness.

[0053] <Configuration example 3> In the first embodiment and configuration examples 1 and 2, configurations using split pieces 7 that are evenly divided in the circumferential direction are exemplified, but the insulating flange 6 can also be formed by mixing and arranging pieces of different circumferential sizes.

[0054] For example, the insulating flange 6 can be formed by arranging the segment pieces 7h divided into six equal parts as shown in Fig. 4 and the segment pieces 7i divided into three equal parts as shown in Fig. 10 so that their ends overlap in the circumferential direction as shown in Fig. 11. In this case, for example, the segment pieces 7h without the lead-out holes 8 can be made different in size from the segment pieces 7i with the lead-out holes 8 formed therein.

[0055] This reduces the risk of placing the split pieces 7 with the draw-out holes 8 in the wrong place, and there is no need to worry about the order of the split pieces 7 without the draw-out holes 8.Furthermore, by changing the size depending on whether or not the split pieces 7 have the draw-out holes 8, split pieces 7 of the same shape will not be mixed together with those with and without the draw-out holes 8, which improves work efficiency and prevents increases in manufacturing costs and component management costs.

[0056] <Configuration example 4> Up to this point, we have illustrated a configuration in which the insulating flange 6 is placed directly on the end of the winding 4, but the insulating flange 6 can be placed in another position as long as it covers the end of the winding 4. For example, as shown as a comparative example in Figure 12, the upper end of the winding 4 may be provided with a height-adjusting spacer 10, a conventional insulator 11 that functions similarly to the insulating flange 6, and a yoke-side insulator 12 that ensures insulation from the upper yoke 3b. This yoke-side insulating member is made of an electrically insulating material such as epoxy resin.

[0057] Furthermore, the distance (ΔL) between the upper yoke 3b and the yoke-side insulator 12 is predetermined to ensure the necessary insulation. Therefore, it is basically constant even if the configuration of the stator 1 is changed. In other words, a predetermined space exists between the upper yoke 3b and the yoke-side insulator 12 regardless of the size of the stator 1. In this case, let us assume that the height from the bottom end of the winding 4 to the top end of the upper yoke 3b is (H0).

[0058] The insulating flange 6 is made of an insulating material. Therefore, even if the insulating flange 6 is disposed in a position above the yoke-side insulator 12 in the axial direction, as shown in the example, or more precisely, even if the flange 161 of the insulating flange 6 is disposed between the upper yoke 3b and the yoke-side insulator 12, insulation from the upper yoke 3b can be ensured.

[0059] When arranged in this manner, the insulating flange 6 is positioned in the space between the upper yoke 3b and the yoke-side insulator 12, so the height (H1) from the lower end of the winding 4 to the upper end of the upper yoke 3b is lower than the height (H0) of the comparative example by the height (H2) of the conventional insulator 11.

[0060] This allows the overall height of the core 3 to be reduced without impairing insulation. That is, the yoke-side insulator 12 is provided at the end of the winding 4 in the axial direction, with a predetermined insulation distance between it and the yoke, and the insulating flange 6 is attached to the yoke-side insulator 12. York By configuring the stator 1 so that the flange 161 is positioned between the inner circumferential flange 16 and the flange 16, it is possible to reduce the size and weight of the stator 1 while maintaining its performance. The same applies to the inner circumferential flange 16 described above.

[0061] <Configuration example 5> 13, an auxiliary insulating member 20 may be provided at the position where the ends of adjacent segments 7 overlap, covering the boundary between the segments 7. This auxiliary insulating member 20 may be provided on the inner flange 16, or may be provided on both the insulating flange 6 and the inner flange 16.

[0062] Specifically, the auxiliary insulating member 20 is formed in a generally flat plate shape as shown in the example shape, and its width (W21) is set to a size that can cover the end of the segment 7, its height (H21) is set to be roughly equal to the radial size of the insulating flange 6, and its thickness (T21) is appropriately set, for example, to the same thickness as the insulating flange 6.

[0063] As shown in Arrangement Example 1, auxiliary insulating member 20 can be arranged in a position where it covers from above the end of segment 7 that is arranged on the upper end side of winding 4. As a result, as shown in the X-side view, being divided makes it possible to lengthen the creepage distance in the path from the upper end of winding 4 to the upper surface side of insulating flange 6, thereby improving insulation.

[0064] Alternatively, as shown in Arrangement Example 2, auxiliary insulating member 20 can be arranged in a position where it covers from below the end of segment 7 that is located on the upper end side of winding 4. As a result, as shown in a Y-shaped side view, the division can increase the creepage distance from the upper end of winding 4 to the upper surface of insulating flange 6, thereby improving insulation.

[0065] In this way, by providing auxiliary insulating members 20 that are arranged at positions where the ends of adjacent segments 7 overlap and cover the ends of the segments 7, it is possible to further improve insulation when providing insulating flanges 6 on the segment side or inner flanges 16. Furthermore, the segments 7 can be configured to be used as auxiliary insulating members 20.

[0066] <Configuration example 6> So far, we have explained a configuration example in which the ends of adjacent segments 7 are simply overlapped, but it is also possible to configure the ends of adjacent segments 7 to overlap within the range of their thickness (T30), as shown in Figure 14. In this case, by forming an inclined surface 21 at the end of each segment that faces in the opposite direction to the adjacent segment, it becomes possible to overlap each segment 7 within the range of its thickness.

[0067] 14, each segment 7j has a size equivalent to that obtained by equally dividing the insulating flange 6 in the circumferential direction, and each segment 7j has an inclined surface 21j at its circumferential end that is inclined in the opposite direction to that of the adjacent segment 7k. The inclined surface 21j is formed on the plate-like portion 71 and the wall-like portion 72. Similarly, each segment 7k has a size equivalent to that obtained by equally dividing the insulating flange 6 in the circumferential direction, and each segment 7j has an inclined surface 21k at its circumferential end that is inclined in the opposite direction to that of the adjacent segment 7j.

[0068] Then, by arranging these segments 7j and 7k in the circumferential direction within the range of their thickness (T3) with their ends overlapping, an insulating flange 6 having a roughly annular shape is formed, as shown in the arrangement mode. In this case, although the provision of the inclined surface 21 makes the creepage distance longer than when a surface is formed along the axial direction, by arranging the above-mentioned auxiliary insulating member 20 on the end, for example, on the upper surface, the creepage distance can be further extended, as shown in the Z-side view, and insulation properties can be improved.

[0069] In this way, the insulating flange 6 can be formed by arranging the divided pieces 7, each having a size equivalent to that of the insulating flange 6 divided in the circumferential direction and each having an inclined surface 21 that is inclined in the opposite direction to the other divided pieces 7 adjacent to the circumferential end, in a state where the inclined surfaces 21 overlap each other, thereby achieving the same effects as the first embodiment and the other configuration examples described above, such as ensuring insulation while absorbing individual differences in the windings 4.

[0070] In this case, the insulating flange 6 can be formed by forming the segments 7 in a size that is evenly divided in the circumferential direction and arranging the same number of segments as the number of segments. Alternatively, the insulating flange 6 can be formed by arranging segments of different sizes in the circumferential direction. Also, a configuration in which the ends of the segments 7 are simply overlapped and a configuration in which they are overlapped at the inclined surfaces 21 can be mixed.

[0071] Although several 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 embodied 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 within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0072] In the drawings, 1 is a stator, 2 is a container, 3 is an iron core, 31 is a leg portion, 32 is an upper yoke (yoke portion), 33 is a lower yoke (yoke portion), 4 is a winding, 4a is a conductor, 41 is an outer winding (winding), 42 is an inner winding (winding), 5 is a gap, 6 is an insulating flange, 61 is a flange portion, 62 is a body portion, 7, 7a to 7i are divided pieces, 71 is a plate-shaped portion, 72 is a wall-shaped portion, 12 is a yoke-side insulator, 16 is an inner flange (insulating flange), 161 is a flange portion, 162 is a body portion, 17 is an inner divided piece (divided piece), 171 is a plate-shaped portion, 172 is a wall-shaped portion, 20 is an auxiliary insulating member, and 21, 21j, and 21k are inclined surfaces.

Claims

1. an iron core having a plurality of legs and a yoke portion connecting the legs; a winding formed by winding a conductor and attached to the leg; a flange provided at an end of the winding on the yoke portion side and covering the end of the winding in the axial direction, and an insulating flange having a cylindrical body portion extending downward from an inner circumferential side of the flange, The insulating flange is a stationary member formed by arranging a plurality of segments divided in the circumferential direction such that the circumferential end of each segment overlaps with the adjacent segment.

2. 2. The static device according to claim 1, wherein the split pieces have a plate-like portion extending in a circumferential direction of an axial end of the winding and forming the flange when arranged, and a wall-like portion extending radially downward from an end of the plate-like portion and curving along the end of the plate-like portion and forming the body when arranged, the plate-like portion being arranged to cover the end of the winding and the wall-like portion being arranged along a side surface of the winding.

3. the winding includes an outer circumferential winding and an inner circumferential winding disposed on the inner circumferential side of the outer circumferential winding via a predetermined gap; 3. The static device according to claim 2, wherein the divided piece covers an upper end of the outer circumferential winding or the inner circumferential winding with the plate-shaped portion, and the wall-shaped portion is formed at an end of the plate-shaped portion on the gap side.

4. The stationary member according to any one of claims 1 to 3, wherein the divided pieces are formed to a size that is equivalent to dividing the insulating flange in the circumferential direction, and the number of the divided pieces arranged in the circumferential direction is greater than the number of divisions.

5. The static device according to any one of claims 1 to 3, wherein the divided pieces are formed by dividing the insulating flange in the circumferential direction, and pieces of different circumferential sizes are arranged in a mixed manner.

6. 4. The static device according to claim 1, wherein the divided pieces are sized to correspond to the insulating flange being divided in the circumferential direction, and the divided pieces have inclined surfaces at their circumferential ends that are inclined in the opposite direction to the other adjacent divided pieces, and the inclined surfaces are arranged so that they overlap each other.

7. The static device according to claim 1 , further comprising an auxiliary insulating member that is disposed at a position where the ends of the adjacent segments overlap, and covers the ends of the segments.

8. a yoke-side insulator disposed at an end of the winding in the axial direction to ensure insulation between the winding and the yoke portion, The static device according to claim 1 , wherein the insulating flange is disposed such that the flange is located between the yoke-side insulator and the yoke portion.

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