Coil structure, coil structure assembling method and transformer

Abstract

The invention provides a coil structure, a coil structure assembling method and a transformer. The invention is applicable to the technical field of transformers. The coil structure includes: an iron core including a plurality of winding portions; the plurality of coils are arranged corresponding to the plurality of winding parts; the coils are wound around the corresponding winding parts, and pressing plates are arranged at the two ends, in the extending direction of the winding parts, of the coils. The two fixing pieces are connected with the plurality of winding parts; the two fixing pieces are located on the sides, away from each other, of the two pressing plates in the same coil, and the two fixing pieces are used for applying pushing force to the two pressing plates of the same coil so that the two pressing plates can get close to each other. Therefore, the anti-short-circuit capability of the coil structure can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a coil structure, a coil structure assembly method, and a transformer. Background Art

[0002] As an important power equipment, transformers are widely and critically used in various industries and fields in modern society and are an indispensable component of power systems. With the continuous development of the global economy and the continuous increase in electricity demand, the requirements for energy saving, safety, and reliability of transformers are becoming increasingly stringent.

[0003] At present, the three-dimensional wound core structure used in transformers on the market is widely used due to the characteristics of the core's completely symmetrical three-phase magnetic circuit, small magnetic resistance, low excitation current, low no-load loss, low noise and strong short-circuit resistance.

[0004] However, with the demand for transformers in the field of large capacity and high voltage, the traditional body structure and process can no longer meet the requirements. Summary of the Invention

[0005] The present application provides a coil structure, a coil structure assembly method and a transformer to solve existing problems.

[0006] In a first aspect, the present application provides a coil structure, comprising:

[0007] An iron core including a plurality of winding parts;

[0008] A plurality of coils are provided corresponding to the plurality of winding parts; the coils are wound around the corresponding winding parts, and pressure plates are provided at both ends of the coils along the extension direction of the winding parts;

[0009] Two fixing members are connected to the plurality of winding parts; the two fixing members are located on the side where the two pressing plates in the same coil are away from each other, and the two fixing members are used to apply a thrust to the two pressing plates of the same coil to move them closer to each other.

[0010] By adopting the above technical solution, the coil structure includes an iron core, multiple coils and two fixing parts, wherein the iron core includes multiple winding parts, and multiple coils are wound correspondingly on the multiple winding parts. Each coil is provided with pressure plates at both ends along the extension direction of the winding part, and fixing parts are respectively provided on the outer sides of the upper and lower pressure plates, which are used to apply a thrust to the two pressure plates of the same coil to move them closer to each other, thereby fixing the coil.

[0011] When a transformer experiences a short-circuit current surge, the multiple coils wound around the windings are subjected to radial electromagnetic forces. The upper and lower pressure plates corresponding to each coil transmit the impact force to the mounting bracket, forming a multi-path parallel force transmission network. The mounting bracket acts as an integral load-bearing structure, evenly aggregating the impact force from each coil and transmitting it to the core.

[0012] It is easy to understand that compared with the method of increasing the strength of the inner tube in related technologies, the coil structure of the embodiment of the present application implements precise compression of each coil through the pressure plates corresponding to each coil, forming a distributed force conduction network, making the pressure transmission more uniform, eliminating the risk of insulation damage caused by local overvoltage, and improving the transformer's ability to resist short circuits.

[0013] In some possible implementations, the fixing member includes a plurality of fixing portions connected in sequence, and each fixing portion is respectively connected to at least two pressing plates.

[0014] In some possible implementations, the fixing member includes a plurality of extension portions, each extension portion connects two adjacent fixing portions, and the extension portions are arranged corresponding to the pressure plate.

[0015] In some possible implementations, in the extension direction of the winding portion, the orthographic projection of the winding portion on the plane where the pressing plate is located is located on the inner side of the fixing member.

[0016] In some possible implementations, the fixing member is provided with a movable portion, which is movable along the extension direction of the winding portion, and one end of the movable portion facing the pressing plate abuts against the pressing plate.

[0017] In some possible implementations, the fixing member is provided with a mounting seat, the mounting seat is correspondingly connected to the movable portion, and the movable portion is threadedly connected to the mounting seat.

[0018] In some possible implementations, the winding portion is provided with a mounting barrel, and the mounting barrel includes a plurality of arc-shaped portions;

[0019] The plurality of arc-shaped portions are connected in sequence, and outer surfaces of the plurality of arc-shaped portions are used for winding coils.

[0020] In some possible implementations, at least one of the plurality of arc-shaped portions is provided with a connecting plate;

[0021] The connecting plate is passed through the pressing plate, and one end of the connecting plate away from the arc portion is connected to the fixing piece.

[0022] In a second aspect, the present application provides a coil structure assembly method, which is applied to the coil structure according to any one of the first aspects, comprising:

[0023] Install the mounting barrel to the winding portion of the core;

[0024] Rotate the mounting cylinder to wind the coil around it;

[0025] Connecting a first end of the connecting plate to the mounting cylinder, and connecting a second end of the connecting plate to the fixing member;

[0026] The pressing plate is arranged in the gap between the mounting tube and the fixing member.

[0027] In a third aspect, the present application provides a transformer comprising a coil structure as described in any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0029] Figure 1 A schematic structural diagram of a coil structure provided in an embodiment of the present application;

[0030] Figure 2 A schematic structural diagram of the iron core of the coil structure provided in an embodiment of the present application;

[0031] Figure 3 A schematic structural diagram of a mounting tube for a coil structure provided in an embodiment of the present application;

[0032] Figure 4 This is a schematic diagram of the assembly of the mounting cylinder of the coil structure provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of the assembly of a coil of the coil structure provided in an embodiment of the present application;

[0034] Figure 6 A schematic structural diagram of an insulating plate of a coil structure provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of the assembly of the coil and some fixing parts of the coil structure provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of the assembly of the inner cylinder and the fixing member of the coil structure provided in an embodiment of the present application;

[0037] Figure 9 A schematic flow chart of the coil structure assembly method provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] 100, core; 110, winding portion; 120, mounting tube; 121, arc portion; 122, splicing plate; 130, connecting plate;

[0040] 200, coil; 201, low-voltage coil; 202, high-voltage coil; 203, voltage-regulating coil; 210, pressure plate; 220, elastic cushion;

[0041] 300, fixing member; 301, fixing portion; 302, extension portion; 303, reinforcement portion; 310, movable portion; 320, mounting seat; 330, insulation plate.

[0042] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0043] As mentioned in the background, conventional large-capacity, high-voltage transformers are primarily constructed with silicon steel cores. These transformer cores are made of silicon steel sheets, which are very strong and stable, and are not easily affected by external forces. Therefore, to improve the short-circuit resistance of silicon steel core transformers, most designs incorporate bracing between the coils and the core to enhance radial support for the coils, thereby improving the short-circuit resistance of the transformer.

[0044] However, because the core of an amorphous alloy transformer is made of amorphous alloy, the material itself is relatively fragile and cannot withstand external forces. Therefore, the only way to improve the short-circuit resistance of this type of transformer is to increase the strength of the coil's inner tube. This is usually achieved by changing the material or increasing the thickness of the inner tube.

[0045] However, increasing the inner tube strength will not only increase the cost of the transformer, but also the short-circuit resistance requirements required of the transformer will increase exponentially with the increase in voltage level and product capacity. This method is difficult to meet the requirements.

[0046] Therefore, a new coil structure is needed to improve the short-circuit resistance of the amorphous alloy three-dimensional wound core transformer.

[0047] In order to solve the above technical problems, an embodiment of the present application provides a coil structure, a coil structure assembly method and a transformer, wherein the coil structure includes an iron core, multiple coils and two fixing parts, wherein the iron core includes multiple winding parts, and multiple coils are wound correspondingly on the multiple winding parts. Each coil is provided with a pressure plate at both ends along the extension direction of the winding part, and fixing parts are respectively provided on the outer sides of the upper and lower pressure plates, which are used to apply a thrust to the two pressure plates of the same coil to move them closer to each other, thereby fixing the coil.

[0048] When a transformer experiences a short-circuit current surge, the multiple coils wound around the windings are subjected to radial electromagnetic forces. The upper and lower pressure plates corresponding to each coil transmit the impact force to the mounting bracket, forming a multi-path parallel force transmission network. The mounting bracket acts as an integral load-bearing structure, evenly aggregating the impact force from each coil and transmitting it to the core.

[0049] It is easy to understand that compared with the method of increasing the strength of the inner tube in related technologies, the coil structure of the embodiment of the present application implements precise compression of each coil through the pressure plates corresponding to each coil, forming a distributed force conduction network, making the pressure transmission more uniform, eliminating the risk of insulation damage caused by local overvoltage, and improving the transformer's ability to resist short circuits.

[0050] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

[0051] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0052] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0053] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0054] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, article, or device comprising the element.

[0055] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0056] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0057] See also Figures 1-8 , an embodiment of the present application provides a coil structure, wherein the coil structure may include an iron core 100 , a coil 200 and a fixing member 300 .

[0058] See also Figure 2 The core 100 can adopt a three-dimensional wound core 100 structure, which is composed of three rectangular single frames with the same structure assembled in an equilateral triangle to form a closed magnetic circuit. Each rectangular single frame can be formed by continuously winding several whole amorphous alloy strips.

[0059] The core 100 may include multiple winding sections 110. The winding section 110 refers to a functional area within the three-dimensional wound core 100, formed by joining three rectangular frames together, specifically for winding the coils 200. The three rectangular frames are joined symmetrically at 120°, and the adjacent sides of the joined frames form a cylindrical working surface, which serves as the winding section 110.

[0060] See also Figure 3-Figure 4 The winding portion 110 may be provided with a mounting barrel 120. The mounting barrel 120 may serve as a transition structure between the core 100 and the coil 200, that is, a direct carrier for the coil 200 to be wound.

[0061] A support bar may be provided between the winding portion 110 and the mounting barrel 120. The support bar may include a support plate and a soft rubber plate, which can reduce the external force applied to the winding portion 110, thereby reducing the impact on the performance of the core 100 and improving the radial strength of the coil 200.

[0062] The mounting tube 120 may include a plurality of arcuate portions 121, which are connected in sequence. The outer surfaces of the plurality of arcuate portions 121 may be used for winding the coil 200. The arcuate portions 121 may be made of metal. The shape and size of each arcuate portion 121 may be specifically designed according to the needs of winding the coil 200. For example, the arcuate portion 121 may be provided as two 180° arcuate portions 121, or three 120° arcuate portions 121.

[0063] The multiple arc-shaped portions 121 can be connected via a splicing plate 122. The splicing plate 122 can be made of an insulating material. The connecting surface of the arc-shaped portion 121 can be provided with a groove, and the connecting surface of the splicing plate 122 can be provided with a raised portion. The groove and raised portion are provided with matching connecting holes. During connection, the raised portion of the splicing plate 122 can be snapped into the groove of the arc-shaped portion 121, and then the connecting holes are aligned and fixed to achieve the connection between the multiple arc-shaped portions 121.

[0064] Alternatively, the plurality of arc-shaped portions 121 may be sequentially connected together by welding or mechanical fixing to ensure the overall structural stability of the mounting tube 120 .

[0065] At least one of the plurality of arc-shaped portions 121 may be provided with a connecting plate 130 . The connecting plate 130 may be used to fix the mounting tube 120 and the fixing member 300 .

[0066] Two ends of the connecting plate 130 are respectively connected to the arc portion 121 of the mounting tube 120 and the fixing member 300 , and pass through the pressing plate 210 to form a force transmission channel between the winding portion 110 and the fixing member 300 .

[0067] Connecting the mounting tube 120 and the fixing member 300 via the connecting plate 130 makes the transformer structure more compact. This connection allows the connecting plate 130 to be placed closer to the winding section 110, effectively reducing the overall radial dimensions of the transformer. The direct force transmission path between the mounting tube 120 and the fixing member 300 simplifies the structural hierarchy, eliminating the additional support structures required for force transmission in traditional designs and streamlining the internal space layout.

[0068] The coil 200 may refer to an electromagnetic induction element wound with a conductive material, and is used to realize the mutual conversion between electrical energy and magnetic energy.

[0069] See also Figure 5 There can be multiple coils 200, and the multiple coils 200 can be wound around the multiple winding parts 110. Each winding part 110 is provided with an independent coil 200, which can ensure that the electromagnetic characteristics of each phase winding are well consistent, so that the three-phase magnetic circuit reaches an ideal balance state.

[0070] The coils 200 on each winding part 110 may have multiple layers, including a low voltage coil 201, a high voltage coil 202, and a voltage regulating coil 203. The coils 200 of each layer may be arranged coaxially and wound on the mounting cylinder 120 of the winding part 110 in sequence.

[0071] An insulating plate 330 may be provided between the low-voltage coil 201 and the mounting tube 120. The insulating plate 330 prevents discharge from the low-voltage coil 201 to the ground by evenly distributing the electric field to block potential leakage current paths. It also buffers mechanical stress between the coil 200 and the mounting tube 120, compensating for deformation caused by differences in thermal expansion coefficients of different materials.

[0072] The voltage regulating coil 203 can optimize the ampere-turn distribution of the low-voltage coil 201 and the high-voltage coil 202, reduce leakage flux, reduce the imbalance of electromagnetic force during short circuit, and further improve the short-circuit resistance of the coil 200.

[0073] A pressure plate 210 is provided at each end of the coil 200 along the extension direction of the winding portion 110 , for restraining the axial displacement of the coil 200 and converting the radial electromagnetic force exerted on the coil 200 into pressure on the fixing member 300 .

[0074] The independent pressing plates 210 provided for each coil 200 can ensure that each coil 200 unit can obtain precise pressing force, thereby avoiding the problem of uneven pressure that may be caused by the traditional integral pressing plate 210.

[0075] See also Figure 7 An elastic cushion layer 220 may be provided between the pressure plate 210 and the end surface of the coil 200 to cushion the impact and balance the pressure distribution.

[0076] Each coil 200 is precisely compressed by the pressure plates 210 corresponding to each coil 200 to form a distributed force conduction network, which makes the pressure transmission more uniform, eliminates the risk of insulation damage caused by local overvoltage, and improves the short-circuit resistance of the transformer.

[0077] The fixing member 300 may refer to a key load-bearing component in the transformer body structure, which is connected across the plurality of winding parts 110 and realizes axial constraint on the pressure plate 210 through mechanical connection.

[0078] There can be two fixing parts 300, which are located on the side away from each other of the two pressure plates 210 in the same coil 200, that is, the outer surfaces of the pressure plates 210 at the axial ends of the winding part 110. The coil 200 and the pressure plate 210 serve as the middle layer, and the fixing part 300 serves as the constraint boundary of the outer layer.

[0079] The two fixing members 300 are used to apply a force toward each other on the two pressure plates 210 of the same coil 200. The fixing members 300 generate continuous axial pressure through the movable portion 310, which is evenly transmitted to both ends of the coil 200 through the pressure plates 210. The bidirectional compression design of the two fixing members 300 keeps the coil 200 in a stable pre-compression state, effectively resisting electromagnetic vibration and short-circuit shock during operation.

[0080] In the extension direction of the winding portion 110, the orthographic projection of the winding portion 110 on the plane of the pressure plate 210 can be located inside the fixing member 300. The projection of the winding portion 110 is completely located inside the fixing member 300, so that the fixing member 300 surrounds the winding portion 110, thereby making the fixing member 300 the first force barrier, preferentially absorbing and dispersing mechanical stress during a short-circuit impact, ensuring that the amorphous alloy winding portion 110 is always within the protection area.

[0081] The fixing member 300 may include a plurality of fixing portions 301 connected in sequence, and each fixing portion 301 is connected to at least two pressing plates 210 .

[0082] The fixing portion 301 may refer to a rigid connection section of the fixing member 300 that is directly connected to the pressure plate 210 and is used to accurately transmit the restraining force generated by the fixing member 300 to the target pressure plate 210. For example, when the fixing member 300 is a triangular frame, the three edges are three fixing portions 301, which together complete the force-bearing system.

[0083] Each fixing portion 301 can be a beam-like structure that spans multiple pressure plates 210. In the triangular frame fixing member 300, each frame simultaneously connects two adjacent pressure plates 210 at corresponding positions, forming a distributed force transmission network. This ensures uniform pressure distribution and avoids localized stress concentration.

[0084] The three fixing parts 301 connected end to end can form a triangular rigid frame, so that the impact force from any pressure plate 210 can be dispersed and transmitted through two paths, ensuring that the overall structure has anti-bending and anti-torsion properties.

[0085] The fixing member 300 may include a plurality of extensions 302 . The extensions 302 may refer to connecting platforms at each vertex of the fixing member 300 , connecting two adjacent fixing members 301 , and being disposed corresponding to the pressing plate 210 .

[0086] The extension portion 302 serves as a connecting platform between the fixing portions 301 and can expand the angle between adjacent fixing portions 301 to a larger angle connection, so that the multi-directional force from the pressure plate 210 can be smoothly turned, avoiding the stress concentration phenomenon at the traditional sharp-angle connection.

[0087] The extension portion 302 can maintain a corresponding relationship with the pressure plate 210 in terms of spatial layout. Each extension portion 302 is arranged on the outside of the corresponding pressure plate 210 to ensure that each pressure plate 210 can be directly supported to form a short-path force conduction system.

[0088] The fixing portion 301 may be provided with a reinforcing portion 303. The reinforcing portion 303 may refer to an auxiliary supporting member provided between the fixing portions 301 to enhance the overall rigidity and stability of the fixing member 300 frame.

[0089] The reinforcement portion 303 can be disposed between the two fixing portions 301. The first end of the reinforcement portion 303 can be connected to one of the fixing portions 301, and the second end of the reinforcement portion 303 can be connected to the other fixing portion 301. The reinforcement portion 303 can serve as supplementary support between the two fixing portions 301, optimizing the mechanical transmission path, forming a clearly defined primary and secondary support network for the fixing member 300, and enhancing its anti-deformation capability.

[0090] See also Figure 8 The fixing member 300 may be provided with a movable portion 310. The movable portion 310 may refer to an adjustable force component that changes the pressing force on the pressure plate 210 through axial displacement for dynamic adjustment of the clamping force. For example, the movable portion 310 may be a pressure nail.

[0091] The movable portion 310 can move along the extension direction of the winding portion 110, and its movement trajectory is parallel to the axis of the winding portion 110. The movable portion 310 can be connected to the fixing member 300 using a guide fit to maintain the freedom of movement and ensure the accuracy of the force direction.

[0092] One end of the movable portion 310 facing the pressing plate 210 abuts against the pressing plate 210 , that is, the working end of the movable portion 310 is provided with a contact surface matching the outer shape of the pressing plate 210 , and pressure is transmitted through surface contact.

[0093] The fixing member 300 may be provided with a mounting seat 320 , which is correspondingly connected to the movable portion 310 and is used to mount and guide the movable portion 310 .

[0094] The mounting base 320 can be integrated with the fixing member 300, and the connection rigidity can be ensured by reinforcing ribs. The mounting base 320 can be provided with a matching structure that matches the shape of the movable part 310 to ensure that the movement trajectory of the movable part 310 always remains parallel to the axis of the winding part 110.

[0095] The movable portion 310 and the mounting base 320 can be connected by threads so that the relative positions of the two can be adjusted and fixed in a desired position. Specifically, the movement of the movable portion 310 can be achieved by tightening or loosening the threaded connection between the two.

[0096] The movable part 310 can be designed as a cylinder with a threaded surface. Correspondingly, a threaded hole is provided in the mounting seat 320. By rotating the movable part 310, it can be screwed in or out of the mounting seat 320 to adjust the position of the movable part 310 relative to the fixing part 300.

[0097] After the position of the movable portion 310 is determined, fasteners may be used to lock its position to prevent movement during use and ensure the stability of the coil structure.

[0098] See also Figure 6An insulating plate 330 may be provided between the core 100 and the fixing member 300. The insulating plate 330 may be used to block a conductive path that may be formed between the core 100 and the grounded fixing member 300 disposed below, thereby effectively preventing the circulation problem caused by multiple grounding points of the core 100.

[0099] It is easy to understand that the present application provides a pressure plate 210 at the upper and lower ends of the coil 200, so that each coil 200 can be precisely pressed. At the same time, in order to improve the transformer's ability to withstand short circuits and strengthen the strength of the mounting tube 120, the pull plate between the upper and lower fixing parts 300 is eliminated, and the fixing part 300 and the mounting tube 120 are connected by the connecting plate 130, making the device body more compact and smaller in size, thereby reducing manufacturing costs.

[0100] Figure 9 Schematic diagram of the process of assembling the coil structure provided in the embodiment of the present application. Figure 9 As shown, the method may include:

[0101] S901. Install the mounting tube to the winding portion of the core.

[0102] The iron core can be a three-dimensional wound iron core structure formed by winding a processed amorphous alloy strip into three single iron core frames and then assembling them.

[0103] The mounting tube may be composed of multiple arc-shaped portions and a splicing plate. The connecting surfaces of the arc-shaped portions may be grooved, and the connecting surfaces of the splicing plates may be provided with raised portions. The grooves and raised portions may be provided with matching connecting holes. During connection, the raised portions of the splicing plates may engage with the grooves of the arc-shaped portions, and then the connecting holes are aligned and secured to secure the mounting tube to the winding portion of the core.

[0104] S902: Rotate the installation cylinder to wind the coil around the installation cylinder.

[0105] Wherein, before rotating the installation cylinder, the method may further include arranging an insulating plate on the outside of the installation cylinder.

[0106] The method of winding the coil on the mounting drum may include rotating the winding mold to rotate the mounting drum, and then winding the low-voltage coil, the high-voltage coil and the voltage regulating coil on the mounting drum in sequence.

[0107] S903 , connecting the first end of the connecting plate to the mounting cylinder, and connecting the second end of the connecting plate to the fixing member.

[0108] Before the second end of the connecting plate is connected to the fixing member, the insulating plate may be mounted on the fixing member.

[0109] The method for installing the connecting plate may include moving the iron core with the coil wound to the upper part of the lower fixing member through a sling, then moving the iron core downward to move the mounting tube to a position that cooperates with the lower fixing member, aligning the connecting hole at one end of the connecting plate with the connecting hole of the lower fixing member, and then aligning the connecting hole at the other end of the connecting plate with the connecting hole of the mounting tube, and connecting the connecting plate to the mounting tube and the lower fixing member through bolts and other fixing members.

[0110] Then, the stays can be evenly placed in the gap between the installation tube and the iron core, and the soft rubber sheet on the stays can be in close contact with the surface of the winding portion of the iron core.

[0111] Then use the sling to move the upper fixing piece to the upper part of the iron core, and then move the upper fixing piece downward to a position that cooperates with the mounting tube, align the connecting hole at one end of the connecting plate with the connecting hole of the upper fixing piece, and then align the connecting hole at the other end of the connecting plate with the connecting hole of the mounting tube, and connect the connecting plate to the mounting tube and the upper fixing piece through bolts and other fixing pieces.

[0112] S904: Set the pressing plate in the gap between the mounting tube and the fixing member.

[0113] The method of setting the pressing plate may include respectively embedding the pressing plate into the gap between each coil and the upper fixing member and the gap between each coil and the lower fixing member.

[0114] After the frame is provided, the method may further include providing a pressing pin on the upper fixing member, and rotating the pressing pin to fix the pressing plate to the upper end of the coil. The positions of the pressing pins on the upper fixing member may be provided corresponding to the respective pressing plates.

[0115] The coil structure assembly method provided in the embodiment of the present application can use a split mounting tube to protect the brittle iron core, ensure the layered positioning of the coil through rotary winding, use the connecting plate to construct a mechanical conduction path, and finally complete all-round constraint through the pressure plate, while ensuring the assembly accuracy and reducing the assembly stress on the iron core.

[0116] Based on the same inventive concept, an embodiment of the present application further provides a transformer including the above-mentioned coil structure.

[0117] The above technical description may refer to the accompanying drawings, which form a part of this application and illustrate implementation methods in accordance with the described embodiments in the drawings. Although these embodiments are described in sufficient detail to enable those skilled in the art to implement these embodiments, these embodiments are non-limiting; other embodiments can be used and changes can be made without departing from the scope of the described embodiments. For example, the order of operations described in the flowchart is non-limiting, so the order of two or more operations illustrated in the flowchart and described according to the flowchart can be changed according to several embodiments. As another example, in several embodiments, one or more operations illustrated in the flowchart and described according to the flowchart are optional or deletable. In addition, certain steps or functions can be added to the disclosed embodiments, or the order of two or more steps can be replaced. All these changes are considered to be included in the disclosed embodiments and the claims.

[0118] In addition, terms are used in the above technical description to provide a thorough understanding of the described embodiments. However, overly detailed details are not required to implement the described embodiments. Therefore, the above description of the embodiments is presented for the purpose of illustration and description. The embodiments presented in the above description and the examples disclosed based on these embodiments are provided separately to add context and help understand the described embodiments. The above description is not intended to be exhaustive or to limit the described embodiments to the precise form of the present application. Based on the above teachings, several modifications, selective applications and variations are feasible. In some cases, well-known processing steps are not described in detail to avoid unnecessarily affecting the described embodiments.

[0119] Specific embodiments are used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the core idea of ​​this application. At the same time, for those skilled in the art, based on the idea of ​​this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

[0120] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A coil structure, characterized in that: include: An iron core including a plurality of winding parts; A plurality of coils are provided corresponding to the plurality of winding parts; The coil is wound around the corresponding winding portion, and pressure plates are provided at both ends of the coil along the extending direction of the winding portion; Two fixing members are connected to the plurality of winding parts; the two fixing members are located on a side where the two pressing plates in the same coil are away from each other, and the two fixing members are used to apply a thrust to the two pressing plates of the same coil to move them closer to each other.

2. The coil structure according to claim 1, characterized in that The fixing member includes a plurality of fixing parts connected in sequence, and each of the fixing parts is respectively connected to at least two of the pressing plates.

3. The coil structure according to claim 2, characterized in that The fixing member includes a plurality of extension parts, each of which connects two adjacent fixing parts, and each of the extension parts is arranged corresponding to the pressing plate.

4. The coil structure according to claim 1, characterized in that In the extending direction of the winding portion, the orthographic projection of the winding portion on the plane where the pressing plate is located is located on the inner side of the fixing member.

5. The coil structure according to claim 1, characterized in that The fixing member is provided with a movable portion, and the movable portion is movable along the extending direction of the winding portion. The movable portion is in contact with the pressing plate at one end thereof facing the pressing plate.

6. The coil structure according to claim 5, characterized in that The fixing member is provided with a mounting seat, the mounting seat is correspondingly connected to the movable part, and the movable part is threadedly connected to the mounting seat.

7. The coil structure according to any one of claims 1 to 6, characterized in that: The winding portion is provided with a mounting cylinder, and the mounting cylinder includes a plurality of arc-shaped portions; The plurality of arc-shaped portions are connected in sequence, and outer surfaces of the plurality of arc-shaped portions are used for winding the coil.

8. The coil structure according to claim 7, characterized in that At least one of the plurality of arc-shaped portions is provided with a connecting plate; The connecting plate is passed through the pressing plate, and one end of the connecting plate away from the arc-shaped portion is connected to the fixing member.

9. A coil structure assembly method, characterized in that: Applied to the coil structure according to any one of claims 1 to 8, the coil structure assembly method comprises: Install the mounting barrel to the winding portion of the core; Rotating the mounting cylinder to wind the coil around the mounting cylinder; Connecting a first end of the connecting plate to the mounting cylinder, and connecting a second end of the connecting plate to a fixing member; The pressing plate is arranged in the gap between the installation tube and the fixing member.

10. A transformer, characterized in that: The invention comprises the coil structure according to any one of claims 1 to 8.

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