Winding method of oval coil of high-capacity magnetically controlled reactor

Abstract

The invention relates to a winding method of an oval coil of a high-capacity magnetically controlled reactor. The winding method comprises the following steps: S1, mounting a winding mold; s2, winding a coil; s3, after winding is finished, the winding mold and the coil are taken down and put into a furnace for drying treatment; and S4, discharging the coil from the furnace. The winding method provided by the invention can be suitable for production of elliptical coils with different radial sizes, and is higher in universality. The problem of radial dislocation and distortion caused by offset of end points of a long axis (longitudinal diameter) and a short axis (transverse diameter) of the oval coil in the winding process can be avoided, and the consistency of the two ends of the long axis of the coil is strictly controlled to ensure that the coil is axially vertical without inclination; the inner diameter elliptical radian in the elliptical coil winding process is equal to the elliptical radian of the cross section of the iron core; meanwhile, the problem of radial out-of-tolerance of the inner diameter and the outer diameter of the short shaft after demolding in the oval coil winding process is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer manufacturing, in particular to a winding method of an elliptical coil of a large-capacity magnetic control reactor. BACKGROUND

[0002] The magnetic control shunt reactor has the advantages of compact structure, low loss, small noise, and small self-generated harmonics, and plays an important role in improving the economic benefit of the power grid, and has a broad application prospect. In order to reduce the manufacturing cost and save raw materials, the control coil of the large-capacity magnetic control reactor generally adopts an elliptical coil structure, which is difficult to control in the radial direction. Figure 1 As can be seen, the center of the conventional circular coil is constant, and the radial trajectory can always be kept within the circumferential range because the curvature radius of each point is consistent. Figure 2 As can be seen, even if the center of the elliptical coil is constant, the radial trajectory immediately changes because the curvature radius of each point is inconsistent. Compared with the circular coil, the elliptical coil has the technical problem of being difficult to control in the radial direction, specifically including:

[0003] (1) The long axis (vertical diameter) and the short axis (horizontal diameter) are prone to size deviation, resulting in difficulty in assembly. In theory, the ellipticity of the inner diameter of the coil should be equal to the ellipticity of the cross-sectional arc of the core for close fitting, but the elliptical coil of the large-capacity reactor often has large radial size, large number of turns, and large hardness of the wire. During winding, the wire is prone to elongation of the long axis diameter, causing the short axis (horizontal diameter) to be too large, and the long and short axis sizes are deformed and deviate to varying degrees, resulting in difficulty in assembly of the elliptical coil.

[0004] (2) The end points of the long axis (vertical diameter) and the short axis (horizontal diameter) are prone to deviation, and artificial correction affects the winding quality and speed. In theory, multiple-pie elliptical coils are required to be coaxial and parallel, but the elliptical coil of the large-capacity reactor often has a large difference between the long axis (vertical diameter) and the short axis (horizontal diameter), and has a high winding height, and the whole is elongated. When the wire is tensioned, the mold is prone to twisting and deformation, causing the angle of the elliptical coil to deviate, and the multiple-pie coils are prone to radial misalignment when stacked together.

[0005] (3) The phase spacing is extremely small, and the process requirement is high. During the coil demolding process, the elliptical coil loses the support of the mold inside, and the radial size is prone to deformation and deviation: the short axis (horizontal diameter) size is deviated and enlarged, and the long axis (vertical diameter) size is reduced, causing the spacing between the two column elliptical coils to be small, affecting the reliability and technical and economic indicators of the transformer. SUMMARY

[0006] Therefore, it is necessary to provide a winding method of an elliptical coil of a large-capacity magnetic control reactor, which effectively controls the problem of size deviation of the long axis (vertical diameter) and the short axis (horizontal diameter) of the elliptical coil, ensures that the size of the long axis (vertical diameter) and the short axis (horizontal diameter) of the elliptical coil is stable after demolding, and improves the product quality.

[0007] The technical problems solved by the present application are as follows:

[0008] The present application provides a winding method of an elliptical coil of a large-capacity magnetic control reactor, comprising the following steps:

[0009] S1, installing a winding mold;

[0010] The winding mold comprises an elliptical plate, a support bar, a positioning screw rod and a connecting piece; the elliptical plate is multiple; the long axis end point of the elliptical plate is provided with a clamping groove for limiting the support bar, and the short axis end point is provided with a positioning through hole for limiting the positioning screw rod; a support piece is arranged between any two adjacent elliptical plates; and the connecting piece penetrates the elliptical plate and the support piece;

[0011] A support bar equal division positioning template is arranged on the outer surface of the elliptical plate at the bottom, and the support bar equal division positioning template comprises a support bar center equal division position and a head position; the support bar center equal division position is multiple and is uniformly distributed along the outer surface of the elliptical plate in the circumferential direction, and is used for marking the placement site of the support bar; and the head position is used for marking the starting and ending sites of the electromagnetic wire 15 in the coil;

[0012] S2, winding the coil; during the winding process, a process temporary support bar is symmetrically added outside the long axis end point of the elliptical plate, so as to avoid the concave deformation of the inner diameter of the coil during the winding process; with the winding process, every interval of a certain coil height, an oil gap pad for limiting the process temporary support bar is added between the turns of the coil outside the long axis end point of the elliptical plate;

[0013] S3, after the winding is completed, the winding mold and the coil are taken down, and the furnace drying treatment is performed;

[0014] S4, the coil is taken out of the furnace, a plurality of shaping ring toolings are sleeved outside the coil in the vertical direction, so as to fix the coil, and after the coil is sleeved on the iron core column, the shaping ring tooling, the process temporary support bar and the oil gap pad are removed.

[0015] In some embodiments, step S1 is specifically: assembling the winding mold on the vertical winding machine through the connecting disc and the connecting pad foot.

[0016] In some embodiments, the center of the elliptical plate, the support piece and the connecting disc is provided with a center positioning hole, the connecting piece comprises a center screw rod, the center screw rod penetrates the elliptical plate, the support piece and the connecting disc through the center positioning hole, and the center screw rod is locked by nuts at both ends.

[0017] In some embodiments, the bottom of the connecting disc is connected with a plurality of connecting pad feet through bolts.

[0018] In some embodiments, the support bar is placed according to the support bar center equal division position and is bound on the outer surface of the elliptical plate by a rope.

[0019] In some embodiments, the depth E of the clamping groove is equal to the thickness of the strut; the width N of the clamping groove is equal to the width of the strut.

[0020] In some embodiments, the support comprises a plurality of laminated pads, and the outer circumferential dimension of the pads is smaller than the outer circumferential dimension of the elliptical plate.

[0021] In some embodiments, the positioning screw is locked by positioning nuts at both ends.

[0022] In some embodiments, a plurality of process temporary struts are arranged outside the endpoints of the major axis of the elliptical plate.

[0023] In some embodiments, the sizing ring tooling comprises a sizing ring and sizing struts, the sizing struts are a plurality of struts evenly arranged outside the coil, and the sizing ring is sleeved outside the sizing struts.

[0024] The present application limits the struts at the endpoints of the major axis by arranging clamping grooves at the endpoints of the major axis of the elliptical plate, thereby reducing the risk of displacement of the coil major axis (longitudinal diameter) caused by large major axis force moment, and ensuring that the elliptical coil is perpendicular at the two endpoints of the major axis. The positioning screw is limited by the positioning through hole arranged at the endpoint of the minor axis of the elliptical plate, and the parallelism of the elliptical plate is adjusted by adjusting the upper and lower ends of the positioning screw, thereby ensuring that the axial multi-pieced coils are parallel to each other. The equal division positioning template of the struts is arranged to achieve precise positioning of the starting and finishing points of the struts and the electromagnetic wire in the coil, thereby avoiding deviation during the winding process. The process temporary struts are added during the winding process, so that the inner diameter elliptical arc of the elliptical coil is consistent with the cross-sectional elliptical arc of the core during the winding process, thereby avoiding deformation of the inner diameter of the coil. Oil gap pads are also added to prevent the process temporary struts from moving under external force during the winding process. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0027] Figure 1 It is a schematic diagram of the radial motion of the circular coil.

[0028] Figure 2 It is a schematic diagram of the radial motion of the elliptical coil.

[0029] Figure 3 The structure diagram of the winding mold in one embodiment of the present application.

[0030] Figure 4 The top view of the elliptical plate in one embodiment of the present application.

[0031] Figure 5 The placement diagram of the support bar and the process temporary support bar in one embodiment of the present application.

[0032] Figure 6 The structure diagram of the intermediate structure in the winding process of the large-capacity magnetic control reactor in one embodiment of the present application.

[0033] Figure 7 The structure diagram of the multiple sizing rings tooling outside the coil in one embodiment of the present application.

[0034] Figure 8 The top view of the elliptical coil after the sizing in one embodiment of the present application.

[0035] Explanation of the reference signs

[0036] 1, elliptical coil; 2, elliptical plate; 31, support bar; 32, process temporary support bar; 33, sizing support bar; 41, positioning screw; 42, positioning nut; 6, support member; 71, positioning through hole; 72, center positioning hole; 81, clamping groove; 10, oil gap pad; 11, connecting disc; 12, connecting pad foot; 13, sizing ring; 14, core section; 15, electromagnetic wire;

[0037] M, the distance between phases; N, the width of the clamping groove; E, the depth of the clamping groove; A and A', the outer diameter dimension of the long axis of the elliptical coil; a, the inner diameter dimension of the long axis of the elliptical coil; B and B', the outer diameter dimension of the long axis of the elliptical coil; b, the inner diameter dimension of the short axis of the elliptical coil; D and D', the diameter dimension of the circular coil. DETAILED DESCRIPTION

[0038] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0039] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0040] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0041] In this application, unless otherwise explicitly specified and limited, if there are terms "installation", "connection", "connection", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing the specific embodiments and are not intended to limit the application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element.

[0044] The magnetic control shunt reactor has the advantages of compact structure, low loss, small noise, small self-generated harmonics and the like, plays an important role in improving the economic benefits of the power grid, and has a wide application prospect. Figure 1 As can be seen (wherein D and D' represent the diameter size of the circular coil), the center of the conventional circular coil is unchanged, and the radial motion trajectory can always be kept within the circumferential range because the curvature radius of each point is consistent. Figure 2 As can be seen (wherein A and A' represent the outer diameter size of the long axis of the elliptical coil; B and B' represent the outer diameter size of the long axis of the elliptical coil), the center of the elliptical coil is unchanged, and the radial trajectory changes immediately once the position of the major and minor axes is offset because the curvature radius of each point is inconsistent.

[0045] In order to overcome the above technical problems, the application provides a winding mold, which is shown as Figures 3-6 The winding mold comprises an elliptical plate 2, a support bar 31, a positioning screw 41 and a connecting piece. The number of the elliptical plate 2 is multiple, and a clamping groove 81 for limiting the support bar 31 is arranged at both long axis end points of the elliptical plate 2. A positioning through hole 71 for limiting the positioning screw 41 is arranged at both short axis end points of the elliptical plate 2. A support piece 6 is arranged between any two adjacent elliptical plates 2. The connecting piece penetrates the elliptical plate 2 and the support piece 6.

[0046] A support bar equal division positioning template is arranged on the outer surface of the elliptical plate 2 at the bottom, and the support bar equal division positioning template comprises a support bar center equal division position and a head position. The support bar center equal division position is multiple and is uniformly distributed along the outer surface of the elliptical plate 2, and is used for marking the placement point of the support bar 31. The head position is used for marking the starting and ending points of the coil.

[0047] It can be understood that the support bar equal division positioning template is made according to the drawing in a 1:1 ratio.

[0048] The application further provides a winding method of the elliptical coil 1 of the large-capacity magnetic control reactor, which comprises the following steps:

[0049] S1, installing the winding mold.

[0050] S2, winding the coil. During the winding process, a process temporary support bar 32 is symmetrically added outside the long axis end point of the elliptical plate 2 to avoid the concave deformation of the inner diameter of the coil during the winding process. With the winding process, every interval of a certain coil height, an oil gap pad 10 for limiting the process temporary support bar 32 is added between the turns of the coil outside the long axis end point of the elliptical plate 2.

[0051] S3, after winding, the winding mold and the coil are taken off, and the furnace drying treatment is carried out.

[0052] S4, the coil is taken out of the furnace, a plurality of shaping ring toolings are sleeved on the outer side of the coil in the vertical direction for fixing the coil, after the coil is sleeved on the core column, the shaping ring tooling, the process temporary support 32 and the oil gap pad 10 are removed.

[0053] Referring to Figure 8 , Figure 8 It is a plan view of the oval coil 1 after being sleeved, that is, a plan view of the coil sleeved on the core column (wherein A represents the outer diameter size of the long axis of the oval coil; a represents the inner diameter size of the long axis of the oval coil; B represents the outer diameter size of the long axis of the oval coil; and b represents the inner diameter size of the short axis of the oval coil).

[0054] The present application limits the support 31 at the long axis end point of the oval plate 2 by providing a clamping groove 81 at the long axis end point of the oval plate 2, so that the support 31 provided at the long axis end point of the oval plate 2 penetrates the oval plate 2 through the clamping groove 81, which reduces the risk of displacement of the long axis (longitudinal diameter) of the coil caused by the large moment of the long axis, and ensures that the oval coil 1 is wound vertically at two long axis end points.

[0055] The present application is provided with a positioning through hole 71 for limiting the positioning screw 41 at the short axis end point of the oval plate 2. By adjusting the upper and lower ends of the positioning screw 41, the parallelism of the oval plate 2 is adjusted to ensure that the axial multi-pieced coils are parallel to each other.

[0056] The present application realizes precise positioning of the start and finish of the support and the electromagnetic wire 15 in the coil by pasting a support equidistant positioning template on the outer surface of the bottommost oval plate 2, which avoids deviation in the winding process.

[0057] The present application adds a process temporary support 32 during the winding process, so that the inner diameter elliptical curvature of the oval coil 1 is consistent with the elliptical curvature of the core cross section 14 during the winding process, which avoids deformation of the inner diameter of the coil. At the same time, the oil gap pad 10 is added to prevent the process temporary support 32 from moving under the action of external force during the winding process.

[0058] It can be understood that, in order to ensure the elliptical curvature of the inner diameter of the coil, all the oval plates 2 used in the oval mold are formed by one-time machining of a numerical control machining center, and when producing coils of different diameters, only the oval plate 2 needs to be replaced.

[0059] In some embodiments, the material of the oval plate 2 is a laminated wood material or a laminated paperboard material.

[0060] In some embodiments, step S1 is specifically: assembling the winding mold on the vertical winding machine through the connecting disc 11 and the connecting pad foot 12.

[0061] In some embodiments, the bottom of the connecting disc 11 is connected to the plurality of connecting pads 12 by bolts.

[0062] In some embodiments, the center of the elliptical plate 2, the support 6 and the connecting disc 11 is provided with a center positioning hole 72, and the connecting member includes a center screw which penetrates the elliptical plate 2, the support 6 and the connecting disc 11 through the center positioning hole 72, and the center screw is locked by nuts at both ends.

[0063] In some embodiments, the struts 31 are placed according to the strut center equidistant positions 61 and are tied on the outer surface of the elliptical plate 2 by ropes.

[0064] In some embodiments, the positioning screw 41 is locked by the positioning nuts 42 at both ends.

[0065] In some embodiments, the step S1 is specifically as follows: first, the center screw and the positioning screw 41 are tightened with the connecting disc 11 by nuts; then, the connecting disc 11 and the connecting pads 12 are assembled on the winding machine by bolts; then, the elliptical plate 2 and the support 6 are sequentially arranged on the center screw and the positioning screw 41, and are tightened and fixed by the nuts at both ends of the center screw and the positioning screw 41; the strut equidistant positioning template is arranged on the outer surface of the elliptical plate 2 at the bottom, the struts 31 are installed according to the strut center equidistant positions 61, the struts 31 at the two long axis end points of the elliptical plate 2 are first installed and are arranged in the clamping grooves 81, and then the struts 31 at other positions are installed, and finally all the struts 31 are tied on the outer surface of the elliptical plate 2 by ropes to form an elliptical column.

[0066] In some embodiments, the depth of the clamping groove 81 is equal to the thickness of the strut 31, and the width of the clamping groove 81 is equal to the width of the strut 31.

[0067] In some embodiments, the support 6 includes a plurality of stacked pads, and the outer circumferential dimension of the pad is smaller than the outer circumferential dimension of the elliptical plate 2, that is, the pad does not need to be in contact with the struts 31 outside the elliptical plate 2, but only needs to be able to play a supporting role.

[0068] In some embodiments, as shown in Figure 6 Further, a plurality of groups of process temporary struts 32 are symmetrically arranged at the two long axis end points of the elliptical plate 2, so that the inner diameter elliptical radian of the elliptical coil 1 is equal to the elliptical radian of the core cross section 14 during the winding process, and the inner diameter of the elliptical coil 1 is prevented from being deformed and depressed.

[0069] In some embodiments, the temporary process support 32 includes a first component and a second component (not shown in the figure) sequentially along the direction away from the elliptical plate 2. The width of the first component is smaller than the width of the second component, and the two together form a T-shaped temporary process support 32. The oil gap pad 10 includes a first groove and a second groove (not shown in the figure) sequentially connected along the direction away from the temporary process support 32. The width of the first groove is smaller than the width of the second groove. The first component is disposed in the first groove, and the second component is disposed in the second groove, so as to achieve the purpose of limiting the temporary process support 32 by the oil gap pad 10.

[0070] In some embodiments, the support bar equally divided positioning template also includes equally divided positions at the center of the temporary process support bar for marking the placement points of the temporary process support bar 32.

[0071] In some implementations, such as Figure 7 As shown, the shaping ring fixture includes a shaping ring 13 and shaping support bars 33. There are multiple shaping support bars 33, which are evenly distributed on the outside of the coil. The shaping ring 13 is sleeved on the outside of the shaping support bars 33.

[0072] In some embodiments, the shaping ring 13 includes two elliptical semi-rings, with a first connecting part and a second connecting part respectively provided at both ends of the elliptical semi-rings. The first connecting part and the second connecting part are respectively provided with a first connecting hole and a second connecting hole. The first connecting part and the second connecting part of one elliptical semi-ring overlap with the second connecting part and the first connecting part of the other elliptical semi-ring. The movable connection between any two elliptical semi-rings is achieved by a locking member passing through the first connecting hole and the second connecting hole.

[0073] In some embodiments, the shaping support bar 33 is provided with positioning slots, and the shaping ring 13 is respectively engaged with the corresponding positioning slots.

[0074] This application overcomes the shortcomings of traditional technologies and provides a method for winding an elliptical coil 1 for a large-capacity magnetically controlled reactor. This method is simple to operate, applicable to the production of elliptical coils 1 with different radial dimensions, and has greater versatility. It avoids the problem of radial misalignment, twisting, and deformation caused by the offset of the endpoints of the major axis (longitudinal diameter) and minor axis (transverse diameter) of the elliptical coil 1 during winding. Strict control of the consistency at both ends of the long axis of the coil ensures that the coil axial direction is vertical and without tilting. It ensures that the elliptical arc of the inner diameter of the elliptical coil 1 is equal to the elliptical arc of the iron core section 14 during winding. Simultaneously, it avoids radial deviations in the inner and outer diameters of the minor axis during the winding process and after demolding of the elliptical coil 1. During the demolding process, the shaping ring tooling continuously assists in supporting the coil, ensuring the designed phase spacing M and the tightness of the assembly, thus improving the manufacturing precision and process quality of the elliptical coil 1.

[0075] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, any combination of the technical features is deemed to be within the scope of the present disclosure as long as there is no inconsistency with the combination.

[0076] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method for winding an elliptical coil for a large-capacity magnetically controlled reactor, characterized in that, Includes the following steps: S1. Install the winding mold; The winding mold includes an elliptical plate, a support bar, a positioning screw, and a connector; there are multiple elliptical plates; the major axis end of the elliptical plate is provided with a slot for limiting the support bar, and the minor axis end is provided with a positioning through hole for limiting the positioning screw; a support is provided between any two adjacent elliptical plates; the connector passes through the elliptical plate and the support. A support bar equally divided positioning template is provided on the outer surface of the elliptical plate at the bottom. The support bar equally divided positioning template includes a center equally divided position and an overhang position of the support bar. There are multiple center equally divided positions of the support bar, which are evenly distributed around the outer surface of the elliptical plate to mark the placement position of the support bar. The overhang position is used to mark the starting and ending points of the coil. S2. Winding the coil: During the winding process, temporary process support bars are symmetrically added to the outside of the long axis end of the elliptical plate to prevent the inner diameter of the coil from being concave and deformed during the winding process. As the winding progresses, at certain intervals of coil height, oil gap pads are added between the turns of the coil outside the long axis end of the elliptical plate to limit the temporary process support bars. S3. After winding is completed, remove the winding mold and the coil and put them into the oven for drying. S4. After the coil is taken out of the furnace, multiple shaping ring fixtures are installed on the outside of the coil in the vertical direction to fix the coil. After the coil is fitted onto the iron core column, the shaping ring fixtures, temporary process support bars and oil gap pads are removed.

2. The winding method according to claim 1, characterized in that, Step S1 specifically involves assembling the winding mold onto the vertical winding machine via a connecting disc and connecting pads.

3. The winding method according to claim 2, characterized in that, The elliptical plate, the support member, and the connecting disk are provided with a central positioning hole. The connecting member includes a central screw, which passes through the central positioning hole, the elliptical plate, the support member, and the connecting disk, and the two ends of the central screw are locked with nuts.

4. The winding method according to claim 2, characterized in that, The bottom of the connecting disc is connected to a plurality of connecting feet by bolts.

5. The winding method according to claim 1, characterized in that, The support bars are placed at equal intervals according to their center and are tied to the outer surface of the elliptical plate with ropes.

6. The winding method according to claim 1, characterized in that, The depth of the slot is equal to the thickness of the support strip; the width of the slot is equal to the width of the support strip.

7. The winding method according to claim 1, characterized in that, The support member includes multiple stacked pads, the outer circumference of which is smaller than that of the elliptical plate.

8. The winding method according to claim 1, characterized in that, The two ends of the positioning screw are locked by positioning nuts.

9. The winding method according to claim 1, characterized in that, Multiple temporary process supports are provided on the outer side of any major axis endpoint of the elliptical plate.

10. The winding method according to claim 1, characterized in that, The shaping ring fixture includes a shaping ring and shaping support bars. There are multiple shaping support bars, which are evenly distributed on the outside of the coil. The shaping ring is sleeved on the outside of the shaping support bars.

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