A high-voltage winding outlet terminal and a high-voltage winding

Abstract

This application discloses a high-voltage winding output terminal for high-voltage winding output. The high-voltage insulation layer of the high-voltage winding is an elastomer. The output terminal has an overall prismatic structure and includes an inner part and an outer part connected together. The inner part is used to connect the wires inside the high-voltage winding, and the outer part is used to connect the connectors outside the high-voltage winding. The outer periphery of the inner part has several first grooves arranged along the axial direction of the output terminal, and the outer periphery of the outer part has several second grooves arranged circumferentially along the output terminal. The output terminal of this application has both good torsional and pull-out resistance characteristics, which can prevent the output terminal from coming out of the high-voltage insulation layer when connecting to the connectors outside the high-voltage winding, improving the reliability of the wire connection and ensuring product quality. This application also discloses a high-voltage winding.

Description

Technical Field

[0001] This application relates to the field of dry-type transformer technology, and in particular to a high-voltage winding output terminal and a high-voltage winding. Background Technology

[0002] Traditional dry-type transformers use epoxy resin as the insulating filler material for high-voltage windings. After curing, epoxy resin has high hardness. Therefore, the output terminals of this type of high-voltage winding do not need to consider pull-out resistance, but only need to consider certain torsional resistance. Its torsional resistance design is mostly to set a knurled structure on the surface of the output terminals.

[0003] Currently, high-temperature vulcanized silicone rubber is used as the insulating filler material for the high-voltage winding of new dry-type transformers. After vulcanization, silicone rubber has a certain hardness, but its hardness is lower than that of cured epoxy resin. Therefore, the outgoing terminals used in this type of high-voltage winding need to consider not only torsional resistance but also pull-out resistance. If knurled outgoing terminals are used directly, their pull-out resistance is seriously insufficient, and their torsional resistance also cannot meet the requirements for installation and long-term use, affecting the reliability of wire connections and thus affecting the quality of the high-voltage winding. Utility Model Content

[0004] To address the shortcomings of existing technologies, the main objective of this application is to provide a high-voltage winding output terminal that possesses both excellent torsional and pull-out resistance characteristics. This prevents the output terminal from detaching from the high-voltage insulation layer when connected to external connectors of the high-voltage winding, thereby improving the reliability of wire connections and ensuring product quality.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is: a high-voltage winding output terminal for outputting high-voltage windings, wherein the high-voltage insulation layer of the high-voltage winding is an elastomer, the output terminal is generally in the form of a prism structure, and the output terminal includes an inner part and an outer part connected together. The inner part is used to connect the wires inside the high-voltage winding, and the outer part is used to connect the connectors outside the high-voltage winding. The outer periphery of the inner part is provided with a plurality of first grooves, which are arranged along the axial direction of the output terminal. The outer periphery of the outer part is provided with a plurality of second grooves, which are arranged along the circumferential direction of the output terminal.

[0006] Among them, the prism structure can be a square prism, a pentagonal prism, a hexagonal prism, or an octagonal prism.

[0007] The inner part has a wiring hole at the end away from the outer part for connecting wires. The shape and size of the wiring hole match the shape and size of the wire cross-section.

[0008] The conductor has a rectangular cross-section and the connection hole is an oblong shape.

[0009] The wiring holes and wires are connected by welding.

[0010] The inner part has two first grooves on its outer periphery, which are symmetrically distributed on both sides of the wiring hole.

[0011] The outer part has a connecting hole at the end away from the inner part. The connecting hole is set along the axial direction of the outgoing terminal and is a threaded hole for connecting the connector.

[0012] The connector is an external connecting rod or lead wire, and it is connected to the connecting hole by bolts.

[0013] The second groove is an annular groove, and several second grooves are spaced apart along the axial direction of the outgoing terminal.

[0014] The second groove is an arc-shaped groove, and several arc-shaped grooves are staggered on the outer periphery of the outer part.

[0015] To achieve the above objectives, another technical solution adopted in this application is as follows: a high-voltage winding, including outgoing terminals.

[0016] The beneficial effects of this application are as follows: the outgoing terminal of this application has a prismatic structure, which is easy to process, and its own polygonal end face can provide certain anti-torsion characteristics. By opening the first axial groove and filling it with elastic material, the outgoing terminal can obtain good anti-torsion characteristics in the circumferential direction; by opening the second circumferential groove and filling it with elastic material, the outgoing terminal can obtain good pull-out characteristics in the axial direction, thereby preventing the outgoing terminal from coming out of the high voltage insulation layer when connecting to the external connector of the high voltage winding, improving the reliability of the wire connection, and thus ensuring product quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 This is a front view of a dry-type transformer 10 according to one embodiment of this application;

[0019] Figure 2 This is a top view of a dry-type transformer 10 according to one embodiment of this application;

[0020] Figure 3 This is a front view of the assembled iron core 110 according to one embodiment of this application;

[0021] Figure 4 yes Figure 2 Enlarged view of point G in the middle;

[0022] Figure 5 This is a three-dimensional schematic diagram of the winding body 1310 according to an embodiment of this application;

[0023] Figure 6 This is a three-dimensional schematic diagram of a high-voltage coil 1320 wound on a winding body 1310 according to an embodiment of this application;

[0024] Figure 7 This is a perspective view of the winding member 2314 according to one embodiment of this application;

[0025] Figure 8 This is a perspective view of the winding body 1310 according to another embodiment of this application;

[0026] Figure 9 This is a perspective view of the high-voltage winding 130 according to one embodiment of this application;

[0027] Figure 10 This is a partial cross-sectional view of the high-voltage winding 130 according to one embodiment of this application;

[0028] Figure 11 This is a schematic diagram of the structure of the output terminal 150 in one embodiment of this application;

[0029] Figure 12 This is a schematic diagram of the structure of the output terminal 150 at another angle in one embodiment of this application;

[0030] Figure 13 This is a side view of the outgoing terminal 150 in one embodiment of this application;

[0031] Figure 14 This is a front view of the outgoing terminal 150 in one embodiment of this application;

[0032] Figure 15 This is a rear view of the outgoing terminal 150 in one embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] like Figures 1 to 3As shown, the dry-type transformer 10 is a three-phase transformer, with phases A, B, and C, meaning it comprises three single-phase transformers. Depending on the structure of the core 110, the three single-phase transformers can be arranged in a linear or delta configuration, and the three transformers can be symmetrical. Furthermore, this dry-type transformer 10 can also be used as an isolation transformer, frequency converter, or test transformer, etc.

[0035] In one embodiment, three single-phase transformers are arranged in a linear structure. The dry-type transformer 10 includes a core 110, a low-voltage winding 120, and a high-voltage winding 130. The core 110 includes three columnar core bodies 111, an upper yoke 112 located at the upper end of the three columnar core bodies 111, and a lower yoke 113 located at the lower end of the three columnar core bodies 111. Three low-voltage windings 120 are provided, each sleeved around the outer periphery of the three columnar core bodies 111. Three high-voltage windings 130 are provided, each sleeved around the outer periphery of the three low-voltage windings 120. That is, the three columnar core bodies 111, the three low-voltage windings 120, and the three high-voltage windings 130 are sequentially sleeved from the inside out, thereby forming a three-phase dry-type transformer 10. Furthermore, the columnar core body 111, the low-voltage winding 120, and the high-voltage winding 130 of each phase are coaxially arranged, that is, their axial directions are in the same direction. The columnar iron core 111 is composed of multiple layers of silicon steel sheets, which are bound and fixed together with cable ties. The radial cross-section of the columnar iron core 111 is approximately elliptical, circular, or other shapes, as long as it can be accommodated in the hollow cavity of the low-voltage winding 120; no restrictions are imposed here. The upper yoke 112 and lower yoke 113 are also composed of multiple layers of silicon steel sheets, which fix the three columnar iron cores 111 together to form the iron core 110.

[0036] A core clamp 140 is provided on the outer side of the core 110 to hold the core 110. The core clamp 140 can be a channel steel component or a hollow tube component, and there is no limitation on it. There are four core clamps 140, two of which are symmetrically located on both sides of the upper end of the core 110; the other two are symmetrically located on both sides of the lower end of the core 110.

[0037] Combination Figure 2 and Figure 4 As shown, the low-voltage winding 120 includes a copper foil 121, a low-voltage insulation layer 122, and a support strip 123, with the copper foil 121 and the low-voltage insulation layer 122 alternately arranged. The copper foil 121 is formed by winding a whole sheet of copper foil paper, and the low-voltage insulation layer 122 is overlapped with the copper foil 121 and wound together, thus achieving the alternating arrangement of the copper foil 121 and the low-voltage insulation layer 122.

[0038] The low-voltage winding 120 is provided with at least one heat dissipation channel, which is located between adjacent copper foils 121 and low-voltage insulation layers 122, and a support bar 123 is located in the heat dissipation channel to support and isolate adjacent copper foils 121 and low-voltage insulation layers 122.

[0039] like Figures 5-9 As shown, the high-voltage winding 130 includes a winding body 1310, a high-voltage coil 1320, and a high-voltage insulation layer 1330. The conductor is wound on the winding body 1310 to form the high-voltage coil 1320. The high-voltage coil 1320 includes several coil segments, which are spaced apart along the axial direction of the winding body 1310.

[0040] In one embodiment, see Figure 5 and Figure 6 The winding body 1310 adopts a fixed winding structure. Specifically, the winding body 1310 includes several winding plates 1313 and several auxiliary components 1311. The winding plates 1313 are arranged along the axial direction of the winding body 1310 and are evenly distributed along the circumference of the winding body 1310. The auxiliary components 1311 are annular and spaced apart along the axial direction of the winding body 1310. The auxiliary components 1311 are snap-fitted to the winding plates 1313. The winding plates 1313 are fixed comb plates, that is, several winding grooves 1314 are provided on the winding plates 1313 so that several comb teeth are formed on one side of the winding plates 1313 for winding wires. At least one section of coil is provided between two adjacent comb teeth on the winding plates 1313, so that each winding groove 1314 is wound with wires. The high-voltage coils 1320 are reasonably distributed and the sections of coil are spaced apart, resulting in balanced force and good mechanical strength. Compared to traditional structures, the winding body 1310 eliminates the rigid insulating liner, resulting in better heat conduction. It also eliminates the interface between the high-voltage insulation layer and the rigid insulating liner, thereby suppressing surface discharge of the rigid insulating liner and saving materials, thus reducing costs.

[0041] Furthermore, on the other side of the winding plate 1313 where the comb teeth are not provided, several support parts 13131 are provided to abut against the winding fixture, so that under the high temperature conditions of injection molding high voltage insulation layer 1330, the winding plate 1313 will not soften and deform due to high temperature, resulting in the high voltage coil 1320 lacking support, effectively avoiding the high voltage coil 1320 from inward deformation, and ensuring the quality of high voltage winding 130.

[0042] In another embodiment, see Figure 7 and Figure 8The winding body 1310 adopts a movable winding structure. The winding body 1310 includes several winding plates 1313, several winding elements 2314, and several auxiliary elements 1311. The structure of the auxiliary elements 1311 and their connection with the winding plates are as described previously and will not be repeated here. Several winding elements 2314 are provided on the winding plates 1313, movable along the winding plate 1313. A winding groove 1314 is formed between two adjacent winding elements 2314 on the winding plate 1313 for winding the conductor. The winding plate 1313 and the winding elements 2314, when engaged, form a comb-like structure. At least one section of coil is provided between two adjacent winding elements 2314 on the winding plate 1313, ensuring that each winding groove 1314 is wound with a conductor. High-voltage coils 1320 are rationally distributed, and each section of coil is spaced apart.

[0043] Specifically, a movable groove 2315 is provided at the bottom where the winding component 2314 connects to the winding plate 1313. The winding component 2314 and the winding plate 1313 are slidably connected through the movable groove 2315, allowing the winding component 2314 to move along the winding plate 1313. This facilitates flexible adjustment of the position of the winding component 2314 according to the shape and structure of the high-voltage coil 1320, broadening its applicability and further reducing costs. For example, the winding plate 1313 is an I-shaped strip, and the winding component 2314 is a rectangular plate. The movable groove 2315 of the winding component 2314 is correspondingly set as a T-shaped groove, meaning the winding plate 1313 passes through the movable groove 2315, allowing the winding component 2314 to move along the winding plate 1313.

[0044] The winding body 1310 is made of fiber-reinforced composite material, which is lightweight and high-strength, giving it good mechanical strength. This effectively supports the winding of the conductor, preventing damage and avoiding the conductor being displaced by the injection impact force generated when high-temperature vulcanized silicone rubber is injected into the winding body 1310. Furthermore, the fiber-reinforced composite material has good heat resistance, preventing deformation of the winding body 1310 due to excessive heat generated by the high-voltage coil 1320 during the operation of the dry-type transformer 10. Combined with... Figure 5 , Figure 6 and Figure 9As shown, a high-voltage coil 1320 is formed by circumferentially winding a conductor around the outer circumferential surface of the winding body 1310. Specifically, the conductor is wound from one end of the winding body 1310 to the other end, and is wound from the winding groove 1314 at one end of the winding body 1310 to the winding groove 1314 at the other end of the winding body 1310, so that the high-voltage coil 1320 is spaced apart along the axial direction of the winding body 1310. After the conductor is wound, two external connections are formed at the beginning and end, namely the first external connection D and the second external connection X. The first external connection D is used to connect the cable, and the second external connection X is used to connect other external connections, such as in a three-phase transformer, for interconnection with each phase transformer. The conductor has six taps leading out from the middle of the winding body 1310 along its axial direction. These taps are tap 2, tap 3, tap 4, tap 5, tap 6 and tap 7. The six taps form a tap switch. For ease of description, taps 2, 4 and 6 are defined as the first tap switch, and taps 3, 5 and 7 are defined as the second tap switch.

[0045] When the wire is wound, it is wound in a winding groove 1314 corresponding to all the winding plates 1313, so that each coil formed by the wire is perpendicular to the axis of the winding body 1310. The winding is convenient and the wire is neatly arranged. The winding plate 1313 is subjected to uniform force and has good mechanical strength.

[0046] Combination Figure 10 The diagram shows a partial cross-sectional view of the high-voltage winding 130, which is covered with a high-voltage insulation layer 1330, cut along its axial direction. The conductor is wound using the aforementioned winding method in a comb-shaped winding plate 1313 to form a disc-shaped high-voltage coil 1320. Along the axial direction of the high-voltage winding 130, the disc-shaped high-voltage coil 1320 and the comb teeth of the winding plate 1313 are spaced apart, that is, a disc coil is provided between two adjacent comb teeth. This coil structure has good mechanical strength and strong ability to withstand the electrostatic force generated by short-circuit current. Compared with layered coils, it has more discs and better heat dissipation.

[0047] Combination Figure 9 As shown, taps 6, 4, and 2 are arranged in sequence to form the first tap switch, and taps 3, 5, and 7 are arranged in sequence to form the second tap switch. The first tap switch and the second tap switch are arranged in parallel. The six taps form the tapping device of the high-voltage coil 1320, which is used to adjust the voltage of the dry-type transformer 10 according to different operating conditions.

[0048] The conductor is wound around the winding body 1310 to form a high-voltage coil 1320. The high-voltage coil 1320 is thus loop-shaped. The loop width of the high-voltage coil 1320 is defined as its width. Therefore, the width of the high-voltage coil 1320 is consistent across all its radial sections, ensuring overall force balance. However, considering practical operation, the widths of each coil across its radial section may not be exactly the same, as long as they are approximately identical.

[0049] In this embodiment, the tap changer includes six taps, so the dry-type transformer 10 has five adjustable voltage levels. In other embodiments, the tap changer may also include four taps, that is, the first tap changer and the second tap changer each include two taps, so the dry-type transformer has three adjustable voltage levels. As long as it meets the actual usage requirements of the dry-type transformer, it is acceptable and no limitation is imposed here.

[0050] Combination Figures 11 to 15 The high-voltage winding 130 also includes a lead-out terminal 150, which is connected to two external terminals leading out from both ends of the high-voltage coil 1320 and six tap terminals leading out from the middle, for the lead-out of the high-voltage winding 130. The high-voltage insulation layer 1330 of the high-voltage winding 130 is an elastic body. The lead-out terminal 150 has an overall prismatic structure. The lead-out terminal 150 includes an inner part 1510 and an outer part 1520 connected together. The inner part 1510 is used to connect the wires inside the high-voltage winding 130, and the outer part 1520 is used to connect the connectors (not shown in the figure) outside the high-voltage winding 130. The outer periphery of the inner part 1510 is provided with a plurality of first grooves 1511, which are arranged along the axial direction of the lead-out terminal 150. One end of the inner part 1510 is also provided with a wiring hole 1512. The outer periphery of the outer part 1520 is provided with a plurality of second grooves 1521, which are arranged circumferentially along the lead-out terminal 150. The outgoing terminal 150 of this application has a prism structure, which is easy to obtain materials, and a certain anti-torsion characteristic can be obtained by utilizing its outer circumferential surface; and a first groove 1511 is opened on the outer circumference of the outgoing terminal 150. When the insulating filling material is fully filled into the first groove 1511, the anti-torsion characteristic of the outgoing terminal 150 in the circumferential direction can be further improved, ensuring the quality of the high voltage winding 130.

[0051] In this embodiment, the output terminal 150 has a hexagonal prism structure, preferably a regular hexagonal prism structure, which allows for the direct use of hexagonal profiles, making them readily available. Furthermore, the regular hexagon is both axially and centrally symmetric, simplifying the processing and manufacturing of the output terminal 150. Additionally, the regular hexagon is also close to a circle, exhibiting strong torsional resistance, further ensuring the quality of the high-voltage winding 130. Moreover, the regular hexagonal prism structure of the output terminal 150 is relatively regular, facilitating the reasonable arrangement of several first grooves 1511 and wiring holes 1512 on the outer periphery of the inner connection portion 1510, and also facilitating the processing of the first grooves 1511 and wiring holes 1512. In other embodiments, the output terminal can also be a square prism, pentagonal prism, or octagonal prism, as long as it meets the pull-out and torsional resistance characteristics of the output terminal; no limitation is imposed here.

[0052] The inner connection portion 1510, located away from the outer connection portion 1520, has a wiring hole 1512. The wiring hole 1512 is used to connect the wires inside the high-voltage winding 130. The shape and size of the wiring hole 1512 match the shape and size of the wire cross-section. The wires inside the high-voltage winding 130 can be connected to the wiring hole 1512 using a welding process, which is simple to process, provides high connection strength, long service life, and low maintenance costs. Figure 14 In this embodiment, the cross-sectional shape of the wire is rectangular, and the wiring hole 1512 is an oblong hole. The middle part of the oblong hole is rectangular, and the two ends are semi-circular holes. The rectangular hole and the semi-circular holes transition smoothly. The oblong hole roughly matches the rectangular cross-section, but is easier to process than the rectangular hole. The wiring hole 1512 is located at the center of the end face of the inner connection portion 1510, that is, the long axis of the oblong hole is located on the line connecting any two opposite vertices of the regular hexagon, and is also parallel to the two opposite sides of the regular hexagon. The wiring hole 1512 extends inward along the axial direction of the outgoing terminal 150 but does not penetrate the inner connection portion 1510. The depth of the wiring hole 1512 along the axial direction of the outgoing terminal 150 is defined as the depth of the wiring hole 1512. The depth of the wiring hole 1512 can be adjusted according to specific application requirements such as wire welding, and is not limited here. The long axis of the oblong hole is the central axis of its two far apart ends, and the short axis is the central axis of its two closest ends. The distance between the two ends on the long axis of the wiring hole 1512 is defined as the length of the wiring hole 1512. That is, the length of the oblong hole is the sum of the diameter of its semi-circular hole and the length of its rectangular hole. The length of the wiring hole 1512 is less than the diagonal distance of the end face of the inner part 1510, ensuring the structural reliability of the outgoing terminal 150. In other embodiments, the wiring hole can also be a circular hole or a rectangular hole, as long as it can connect the wires inside the high-voltage winding, and there is no limitation here.

[0053] In this embodiment, the outer periphery of the inner connection portion 1510 is provided with two first grooves 1511. The first grooves 1511 are rectangular grooves, opened along the axial direction of the outgoing terminal 150. One end of the first groove 1511 is flush with the end face of the inner connection portion 1510 away from the outer connection portion 1520, and the other end of the first groove 1511 is located inside the end of the inner connection portion 1510 near the outer connection portion 1520, that is, the first groove 1511 does not penetrate the inner connection portion 1510. The two first grooves 1511 are provided on two opposite sides of the hexagonal prism, which, while ensuring the structural strength of the outgoing terminal 150, makes the insulating filling material evenly distributed on the outer periphery of the outgoing terminal 150, thereby improving the torsional resistance of the outgoing terminal 150 and further ensuring the quality of the high-voltage winding 130.

[0054] In this embodiment, since the wiring hole 1512 is an oblong hole, the space on both sides of the straight edge of the oblong hole on the inner part 1510 is larger than the space on both sides of the arc edge of the oblong hole. Therefore, the two first grooves 1511 are symmetrically arranged on both sides of the straight edge of the wiring hole 1512, which can effectively improve the space utilization rate on the inner part 1510. Moreover, the distribution of the first grooves 1511 and the wiring hole 1512 is more reasonable, thereby making the performance of the outgoing terminal 150 more reliable. The depth of the first groove 1511 along the axial direction of the output terminal 150 is defined as the depth of the first groove 1511. The depth of the first groove 1511 can be adjusted according to the processing requirements of the insulating filling material. The length of the first groove 1511 along the radial direction of the output terminal 150 is defined as the length of the first groove 1511. The distance between the two ends on the short axis of the wiring hole 1512 is defined as the width of the wiring hole 1512. The sum of the lengths of the two first grooves 1511 and the width of the wiring hole 1512 is less than the distance between opposite sides of the end face of the inner connection portion 1510 to ensure the structural reliability of the output terminal 150. The width of the first groove 1511 along the circumference of the output terminal 150 is defined as the width of the first groove 1511. The width of the first groove 1511 is less than the side length of the end face of the inner connection portion 1510 to ensure the structural strength of the output terminal 150. In other embodiments, the first groove can be curved or any other suitable geometry; the first groove can be one, three or more, and disposed on one or more adjacent sides of the outer periphery of the inner portion, as long as the torsional resistance requirement of the outgoing terminal is met, and there is no limitation herein.

[0055] The external portion 1520 is connected to a connector (not shown in the figure). The connector can be an external connecting rod for connecting each high-voltage winding 130; the connector can also be a lead wire for connecting to an external power source. The external portion 1520 is provided with at least two second grooves 1521, which are spaced apart along the axial direction of the external portion 1520 and are evenly distributed on the outer peripheral surface of the external portion 1520.

[0056] In one embodiment, the second groove 1521 is an annular groove, and several second grooves 1521 are spaced apart along the axial direction of the output terminal 150. In this embodiment, the outer portion 1520 is provided with four second grooves 1521, which are evenly distributed on the outer periphery of the outer portion 1520. The depth of the second groove 1521 along the radial direction of the output terminal 150 is defined as the depth of the second groove 1521, and the depth of the second groove 1521 can be adjusted according to the processing requirements of the insulating filling material. The width of the second groove 1521 along the axial direction of the output terminal 150 is defined as the width of the second groove 1521. The width of the second groove 1521 is approximately equal to the distance between two adjacent second grooves 1521, making the surface of the outer portion 1520 groove-like. This allows the insulating filling material to be fully filled into the second groove 1521, giving the output terminal 150 good pull-out resistance in the axial direction and preventing insufficient pull-out resistance of the output terminal 150 from affecting the reliability of the wire connection. In other embodiments, the second groove can be set to three, five or more, as long as it can meet the pull-out resistance requirements of the outgoing terminal, and there is no limitation here.

[0057] In another embodiment, the second groove 1521 is an arc-shaped groove (not shown in the figure), and a plurality of second grooves 1521 are staggered on the outer periphery of the outer portion 1520. For example, the central angle of each arc-shaped groove is greater than or equal to 180°, and the notches of any two adjacent arc-shaped grooves are arranged opposite each other, so that the plurality of arc-shaped grooves are staggered at intervals; or, for example, the arc-shaped groove is a combined groove, each arc-shaped groove including a plurality of sub-arc-shaped grooves, the plurality of sub-arc-shaped grooves being spaced apart along the circumference of the outgoing terminal 150, and the sub-arc-shaped grooves of any two adjacent arc-shaped grooves being staggered, so that the plurality of arc-shaped grooves are staggered at intervals. The central angles of the plurality of sub-arc-shaped grooves can be the same or different, as long as the pull-out resistance requirements of the outgoing terminal are met, and are not limited here. The depth and width of the second groove 1521 are as described above and will not be repeated.

[0058] In other embodiments, the second trench may be curved or any other suitable geometry, as long as the insulating filler material can be fully filled into the second trench, and there is no limitation herein.

[0059] An external connector 1520 has a connecting hole 1522 at its end away from the internal connector 1510. The connecting hole 1522 is axially aligned with the output terminal 150 and is used to connect a connector. The connecting hole 1522 extends inward along the axial direction of the output terminal 150 but does not penetrate the external connector 1520; that is, the other end of the connecting hole 1522 terminates inside the external connector 1520 without penetrating it. The length of the connecting hole 152 along the axial direction of the output terminal 150 is defined as the depth of the connecting hole 152. The depth of the connecting hole 152 is two-thirds of the length of the external connector 1520 to ensure electrical connection strength. Furthermore, the diameter and depth of the connecting hole 1522 can be adjusted according to specific application requirements, but it always maintains the characteristic of not penetrating the external connector 1520. Figure 15 In this embodiment, the connecting hole 1522 is located at the center of the end face of the outer portion 1520. The connecting hole 1522 is a threaded hole used to connect a connector, which is connected to the connecting hole by bolts. In other embodiments, the connecting hole may be located at a non-central position on the end face of the outer portion, as long as it can meet the electrical connection requirements of the high-voltage winding, and there is no limitation here.

[0060] In this embodiment, the outgoing terminal 150 is made of copper. Both the first groove 1511 and the second groove 1521 are machined by turning, making the material readily available and the processing simple. In other embodiments, the outgoing terminal can also be made of other materials, as long as it can electrically connect the high-voltage winding and the connector; this is not a limitation. The first and second grooves can also be processed in other ways, as long as the outgoing terminal has excellent pull-out and torsional resistance; this is not a limitation either.

[0061] Combination Figures 6 to 9 A high-voltage winding 130 is formed by wrapping a high-voltage coil 1320 and a winding body 1310 with a high-voltage insulation layer 1330. The high-voltage insulation layer 1330 is made of high-temperature vulcanized silicone rubber. First, wires are wound around the winding body 1310 to form the high-voltage coil 1320. The winding body 1310 and the high-voltage coil 1320 are then placed into the injection mold of an injection molding machine. High-temperature vulcanized silicone rubber is injected into the outer periphery of the injection body by adding silicone rubber raw material, resulting in the high-voltage winding 130. The use of high-temperature vulcanized silicone rubber in the high-voltage insulation layer 1330 improves the overall insulation and mechanical properties of the high-voltage winding 130.

[0062] After the high-voltage coil 1320 and the winding body 1310 are encapsulated by high-temperature vulcanized silicone rubber through vacuum injection, the high-temperature vulcanized silicone rubber fills the gap between the high-voltage coil 1320 and the winding body 1310 and wraps both ends of the winding body 1310. The high-temperature vulcanized silicone rubber also fills the first groove 1511 and the second groove 1521 of the output terminal 150, so that the output terminal 150 has good anti-torsion and anti-pull-out properties. The high-temperature vulcanized silicone rubber does not cover the inner wall of the winding body 1310, so that the high-voltage winding 130 is hollow columnar in shape. It can be a hollow cylinder, a hollow elliptical cylinder, or other hollow columnar shapes. The high-temperature vulcanized silicone rubber also does not cover the connection hole 1522 of the output terminal 150, so that the output terminal 150 can be electrically connected to the high-voltage winding 130 and the connector through bolts, etc.

[0063] The beneficial effects of this application are as follows: the outgoing terminal of this application has a prismatic structure, which is easy to process, and its own polygonal end face can provide certain anti-torsion characteristics. By opening the first axial groove and filling it with elastomer material, the outgoing terminal can obtain good anti-torsion characteristics in the circumferential direction; by opening the second circumferential groove and filling it with elastomer material, the outgoing terminal can obtain good pull-out characteristics in the axial direction, thereby preventing the outgoing terminal from coming out of the high voltage insulation layer when connecting to the external connector of the high voltage winding, and ensuring product quality.

[0064] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A high-voltage winding output terminal for outputting the high-voltage winding, wherein the high-voltage insulation layer of the high-voltage winding is an elastomer, characterized in that, The outgoing terminal has an overall prismatic structure. The outgoing terminal includes an inner part and an outer part connected together. The inner part is used to connect the wires inside the high-voltage winding, and the outer part is used to connect the connector outside the high-voltage winding. The outer periphery of the inner part is provided with a plurality of first grooves, which are arranged along the axial direction of the outgoing terminal. The outer periphery of the outer part is provided with a plurality of second grooves, which are arranged circumferentially along the outgoing terminal.

2. The outgoing terminal as described in claim 1, characterized in that, The prism structure is a square prism, a pentagonal prism, a hexagonal prism, or an octagonal prism.

3. The outgoing terminal as described in claim 1, characterized in that, The inner part is provided with a wiring hole at the end away from the outer part for connecting the wire. The shape and size of the wiring hole match the shape and size of the wire cross-section.

4. The outgoing terminal as described in claim 3, characterized in that, The cross-sectional shape of the conductor is rectangular, and the connection hole is an oblong hole.

5. The outgoing terminal as described in claim 3, characterized in that, The wiring hole is connected to the wire by a welding process.

6. The outgoing terminal as described in claim 3, characterized in that, The outer periphery of the inner part is provided with two first grooves, which are symmetrically distributed on both sides of the wiring hole.

7. The outgoing terminal as described in claim 1, characterized in that, The outer part is provided with a connection hole at one end away from the inner part. The connection hole is arranged along the axial direction of the outgoing terminal and is a threaded hole for connecting the connector.

8. The outgoing terminal as described in claim 7, characterized in that, The connector is an external connecting rod or lead wire, and the connector is bolted into the connecting hole.

9. The outgoing terminal as described in claim 1, characterized in that, The second groove is an annular groove, and several second grooves are spaced apart along the axial direction of the outgoing terminal.

10. The outgoing terminal as described in claim 1, characterized in that, The second groove is an arc-shaped groove, and several of the arc-shaped grooves are staggered on the outer periphery of the outer part.

11. A high-voltage winding, characterized in that, Includes the outgoing terminal as described in any one of claims 1 to 10.

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