Adaptive high-power three-phase isolation transformer

Abstract

This invention discloses an adaptive high-power three-phase isolation transformer, belonging to the field of transformer technology. The adaptive high-power three-phase isolation transformer includes windings, with an upper yoke fixing structure and a lower yoke fixing structure located above and below the windings, respectively. A limiting component is located above the upper yoke fixing structure. The limiting component includes a base frame, with at least two horizontally placed first limiting rods on the side of the base frame. A movable frame is mounted on each of the first limiting rods and is movable relative to it. A vertically positioned second limiting rod is located at the bottom of the movable frame, and a plate is connected to the bottom of the second limiting rod, contacting the bottom of the winding. The transformer of this invention can achieve dynamic limiting of the transformer windings, adapting to winding installation deviations and thermal expansion and contraction changes. This invention effectively improves the operational stability of the transformer under high-power conditions.

Description

[0001] This application is a divisional application of the invention entitled "High-Power Three-Phase Isolation Transformer", application number 202511770813.3, and application date 2025.11.28. Technical Field

[0002] This invention relates to the field of transformer technology, and specifically to an adaptive high-power three-phase isolation transformer. Background Technology

[0003] In industrial production, large-scale power equipment drives, high-voltage power supply systems, and new energy grid connection scenarios, adaptive high-power three-phase isolation transformers serve as core power transmission and conversion components, playing a crucial role in achieving electrical isolation between the power grid and the load, suppressing harmonic interference, stabilizing voltage output, and ensuring the safe operation of equipment. With the continuous increase in the power demands of industrial equipment, higher requirements are placed on the operational stability, structural adaptability, ease of maintenance, and parameter adjustability of adaptive high-power three-phase isolation transformers. However, existing technologies still have many shortcomings that urgently need to be addressed.

[0004] Specifically, the existing adaptive high-power three-phase isolation transformers mostly use rigid fixing for winding limiters, which can only achieve static limiters during the initial installation stage and cannot cope with dynamic changes during high-power operation. On the one hand, under high-power conditions, the heat generated by copper and iron losses in the transformer windings increases significantly, making them prone to thermal expansion and contraction. Traditional rigid limiters cannot adaptively adjust the limit position and force. If the limiter is too tight, it will cause winding deformation or even damage to the insulation layer; if the limiter is loose, it will cause winding displacement, resulting in a relative positional shift between the primary and secondary windings. This not only reduces electromagnetic induction efficiency but may also cause partial discharge, electromagnetic noise, and other faults, and in severe cases, even short circuits. On the other hand, to ensure insulation performance and control short-circuit impedance, an isolation structure needs to be set between the primary and secondary windings of the adaptive high-power three-phase isolation transformer. In existing technologies, the isolation structure is mostly an integral, fixed-thickness insulation plate. The requirements for the transformer's short-circuit impedance vary under different load scenarios, and the short-circuit impedance is directly related to the spacing between the primary and secondary windings. Existing fixed-thickness isolation plates require complete replacement to change the spacing, which is not only costly in terms of materials but also necessitates disassembling and reassembling the windings, making the operation complex and time-consuming. To address these issues, existing technologies include patented technologies, such as FR3156979A1, which discloses a three-phase transformer for an isolated voltage converter, comprising: a magnetic circuit, which includes a first part and a second part, each part including: a base with a basic triangular outline, and three studs, each stud extending toward the base of another part of the magnetic circuit, and three support elements for the electrical conductors. However, neither the aforementioned existing technologies nor the corresponding existing technologies have achieved optimal results. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive high-power three-phase isolation transformer. The transformer of this invention can achieve dynamic limiting of the transformer windings and adapt to winding installation deviations and changes in thermal expansion and contraction. This invention effectively improves the operating stability of the transformer under high-power conditions.

[0006] To solve the aforementioned technical problems, the present invention specifically provides the following technical solution: an adaptive high-power three-phase isolation transformer, including a winding, with an upper yoke fixing structure and a lower yoke fixing structure respectively located above and below the winding. A limiting component is located above the upper yoke fixing structure. The limiting component includes a base frame, with at least two horizontally placed first limiting rods on the side of the base frame. Each first limiting rod has a movable frame that can move relative to it. A vertically positioned second limiting rod is located at the bottom of the movable frame, and a plug plate is connected to the bottom of the second limiting rod, contacting the bottom of the winding. The present invention, through the cooperation of the upper and lower yoke fixing structures, provides stable support for the winding from both above and below. Furthermore, the base frame of the limiting component provides an installation foundation for the at least two horizontal first limiting rods. The movable frame on the first limiting rod can move relative to it, causing the vertically positioned second limiting rod and the connected plug plate to adjust their positions synchronously. After the plug plate contacts the bottom of the winding, it can adapt to dimensional changes caused by winding installation deviations or thermal expansion and contraction, achieving precise lateral limiting of the winding and preventing winding offset from causing misalignment of the primary and secondary windings.

[0007] According to one embodiment of the present invention, a first limiting rod is provided with a plug-in rod, and a plug-in block that can move relative to the plug-in rod is provided. Rods are provided on both sides of the plug-in block and are connected to a movable frame. The displacement of the plug-in block relative to the first limiting rod synchronously drives the movable frame to move. The movable frame has a horizontal plate disposed at the bottom of the first limiting rod, and vertical plates extending upwards are provided on both sides of the horizontal plate. The upper end of the vertical plates has a snap-fit ​​interface that connects to the rods on both sides of the plug-in block. Annular grooves are spaced apart on the plug-in rod, and a deformable rubber ring is provided on the inner wall of the through hole of the plug-in block. Under the action of external force, the rubber ring on the inner wall of the through hole of the plug-in block can move relative to the plug-in rod to different positions on the annular grooves. This invention provides a moving reference for the plug-in block through the plug-in rod on the first limiting rod. The annular grooves on the first limiting rod cooperate with the deformable rubber rings on the inner wall of the plug-in block's through hole. Under external force, the rubber rings can deform and slide and get into different annular grooves to achieve plug-in block positioning. The rods on both sides of the plug-in block are connected to the moving frame through the snap-fit ​​interface at the upper end of the vertical plate of the moving frame. When the plug-in block moves relative to the first limiting rod, it can synchronously drive the moving frame to move smoothly along the first limiting rod. The horizontal plate of the moving frame is in contact with the bottom of the first limiting rod to ensure that there is no deviation during the displacement process. This, in turn, stably links the second limiting rod and the plug plate to adjust the limiting position of the winding, realizing manual adjustment during installation.

[0008] According to one embodiment of the present invention, a plug-in rod is provided on the first limiting rod and is arranged horizontally thereto. The two ends of the plug-in rod are connected to the first limiting rod through bearing seats. The bearing seats are used to fix the two ends of the plug-in rod to prevent it from shaking, shifting or axially moving during operation, and to maintain the horizontal accuracy and structural stability of the plug-in rod.

[0009] According to one embodiment of the present invention, the base frame has an upper substrate and a lower substrate spaced apart vertically, which are connected by a connecting rod, and a first limiting rod is disposed on the lower substrate. The base frame forms a stable frame structure through the upper substrate, the lower substrate, and the connecting rod connecting the two.

[0010] According to one embodiment of the present invention, a lead screw is provided on the first limiting rod, and a lead screw nut that can move relative to it is provided on the lead screw nut. Rods are provided on both sides of the lead screw nut and connected to a movable frame. The displacement of the lead screw nut relative to the first limiting rod synchronously drives the movable frame to move. The movable frame has a horizontal plate located at the bottom of the first limiting rod, and vertical plates extending upwards on both sides of the horizontal plate. The upper end of the vertical plates has a locking interface for connecting to the rods on both sides of the lead screw nut. The lead screw nut can move smoothly along the lead screw with high transmission accuracy, avoiding deviations that are easily caused by manual adjustment. The rods on both sides of the lead screw nut are firmly connected to the movable frame through the locking interface at the upper end of the vertical plate of the movable frame, enabling them to synchronously transmit their displacement relative to the first limiting rod to the movable frame. The horizontal plate of the movable frame fits against the bottom of the first limiting rod, limiting the swaying and offset of the movable frame during displacement, ensuring stable movement along the first limiting rod, thereby driving the second limiting rod and the insert plate to accurately adjust the limiting position of the winding, preventing displacement of the winding due to limiting deviation during operation.

[0011] According to one embodiment of the present invention, a lead screw is provided on the first limiting rod and is arranged horizontally therewith. The two ends of the lead screw are connected to the first limiting rod through bearing seats. The first limiting rod and the lead screw are kept horizontally arranged to ensure that the transmission direction of the lead screw is consistent with the extension direction of the first limiting rod, and to avoid displacement of the lead screw nut due to angular deviation between the two. The bearing seats are used to fix the end position of the lead screw, reduce radial runout and axial movement when the lead screw rotates, and ensure the stability of the lead screw operation.

[0012] According to one embodiment of the present invention, a drive motor is provided on the upper substrate, a first bevel gear is provided at the end of the lead screw, the output end of the drive motor is located between the upper substrate and the lower substrate, and the output end of the drive motor has a second bevel gear that meshes with the first bevel gear. The second bevel gear at the output end of the drive motor can mesh with the first bevel gear at the end of the lead screw, thereby transmitting the power of the drive motor to the lead screw, causing the lead screw to rotate. When the lead screw rotates, the lead screw nut on it can be displaced along the lead screw. Through the connection between the two side rods and the vertical plate interface of the moving frame, the moving frame is synchronously driven to move along the first limiting rod, thereby linking the second limiting rod and the insertion plate to adjust the limiting position of the winding, avoiding manual adjustment deviation and ensuring the stability of the winding position.

[0013] According to one embodiment of the present invention, the winding has an iron core, a secondary winding is provided outside the iron core, and a primary winding is arranged at intervals outside the secondary winding. The primary winding is arranged at intervals outside the secondary winding. This arrangement can, on the one hand, ensure the insulation performance between the primary and secondary windings, avoiding short circuits caused by insulation failure during high-power operation; on the other hand, it can reserve space for the subsequent installation of isolation components, making it easy to optimize the short-circuit impedance by adjusting the intervals to adapt to different high-power load requirements. At the same time, the layered layout can also shorten the magnetic flux path and reduce electromagnetic losses.

[0014] According to one embodiment of the present invention, an isolation assembly is provided between the secondary winding and the primary winding. The isolation assembly includes two opposing first and second isolation plates. A first insert plate is arranged around the side of the first isolation plate, forming a slot between the first insert plates. The side of the second isolation plate has a second insert plate connected to the slot. By arranging the first and second isolation plates opposite each other, the secondary winding and primary winding are separated, ensuring insulation and preventing short circuits caused by insulation failure between windings during high-power operation. Furthermore, the first insert plate arranged around the side of the first isolation plate forms a slot, which cooperates with the second insert plate on the side of the second isolation plate. This allows the first and second isolation plates to be spliced ​​together, and the overall thickness of the isolation assembly can be changed by adjusting the depth of the second insert plate inserted into the slot. This adapts to the adjustment requirements of the primary and secondary winding spacing and short-circuit impedance under different operating conditions. Simultaneously, the surrounding second and first insert plates ensure more uniform isolation, reduce local magnetic leakage, and ensure the operational stability of the transformer under high-power conditions.

[0015] Both the first and second isolation plates have auxiliary rings connected to their outer sides via extension rods. These auxiliary rings, connected to the outer sides of the first and second isolation plates via extension rods, provide a ring-like support for the first and second isolation plates. The auxiliary rings can disperse the stress generated by electromagnetic forces or vibrations on the first and second isolation plates during high-power operation, preventing local deformation or misalignment of the two isolation plates.

[0016] According to one embodiment of the present invention, the first insert plate has balls arranged in sequence on its side, and the second insert plate is provided with a groove that allows the balls to move. The balls can roll along the groove, converting the sliding friction between the first insert plate and the second insert plate into rolling friction, reducing the resistance when the two plates move relative to each other. In addition, rolling friction can reduce wear between the insert plates and ensure that the two insert plates fit tightly and do not shift during movement.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can change the spacing between the primary winding and the secondary winding by adjusting the isolation component, and can adapt to the short-circuit impedance requirements under different operating conditions without replacing the entire isolation component. In addition, the present invention provides different schemes of the limiting component that can be freely selected according to the actual situation. It can be manually adjusted or automatically adjusted, and adapts to the winding installation deviation and the size changes caused by thermal expansion and contraction during high-power operation. It avoids the winding deformation, insulation layer damage or displacement problems caused by traditional rigid limiting, and ensures electromagnetic induction efficiency and operational safety. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the first usage state of the adaptive high-power three-phase isolation transformer of the present invention;

[0020] Figure 2 This is a schematic diagram of the second usage state of the adaptive high-power three-phase isolation transformer of the present invention;

[0021] Figure 3 This is a schematic diagram of the first embodiment of the limiting component of the present invention;

[0022] Figure 4 This is a schematic diagram of a second embodiment of the limiting component of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection scheme between the drive motor and the base frame of the present invention;

[0024] Figure 6 This is a schematic diagram of the connection scheme between the first limiting rod and the second limiting rod of the present invention;

[0025] Figure 7 This is a cross-sectional view of the overall winding of the adaptive high-power three-phase isolation transformer of the present invention;

[0026] Figure 8This is a cross-sectional view of a single winding of the adaptive high-power three-phase isolation transformer of the present invention;

[0027] Figure 9 This is a schematic diagram of the isolation component structure of the present invention;

[0028] Figure 10 This is a schematic diagram of the first isolation plate and the first insertion plate of the present invention;

[0029] Figure 11 This is a schematic diagram of the connection scheme between the isolation component and the extended partition of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 10. Winding; 11. Assembly link; 12. Primary winding; 13. Secondary winding; 20. Lower yoke fixing structure; 30. Upper yoke fixing structure; 40. Limiting assembly; 41. Base frame; 42. First limiting rod; 43. Insertion rod; 44. Bearing seat; 45. Moving frame; 46. Second limiting rod; 47. Insertion plate; 48. Insertion block; 49. Drive motor; 410. Lead screw; 411. Lead screw nut; 412. First bevel gear; 50. Isolation assembly; 51. First isolation plate; 52. Second isolation plate; 53. Second insertion plate; 54. First insertion plate; 55. Extension rod; 56. Auxiliary ring; 57. Ball bearing; 60. Auxiliary isolation plate; 70. Iron core; 80. Extended partition. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] The concepts involved in this application will first be described with reference to the accompanying drawings. It should be noted that the following descriptions of various concepts are only for the purpose of making the content of this application easier to understand and do not constitute a limitation on the scope of protection of this application; furthermore, the embodiments and features in the embodiments of this application can be combined with each other unless otherwise specified. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example 1:

[0034] As shown in the attached figure Figure 1 -Appendix Figure 10As shown, the adaptive high-power three-phase isolation transformer includes a winding 10. The winding 10 is provided with an upper yoke fixing structure 30 and a lower yoke fixing structure 20 at the top and bottom, respectively. A limiting component 40 is provided above the upper yoke fixing structure 30. The limiting component 40 includes a base frame 41. At least two horizontally placed first limiting rods 42 are provided on the side of the base frame 41. A movable frame 45 that can move relative to the first limiting rod 42 is provided on the first limiting rod 42. A vertically arranged second limiting rod 46 is provided at the bottom of the movable frame 45. A plug plate 47 is connected to the bottom of the second limiting rod 46. The plug plate 47 is in contact with the bottom of the winding 10. The present invention provides stable support for the winding 10 from the top and bottom by cooperating the upper yoke fixing structure 30 and the lower yoke fixing structure 20. Furthermore, the base frame 41 of the limiting component 40 provides an installation base for at least two horizontal first limiting rods 42. The movable frame 45 on the first limiting rod 42 can move relative to it, driving the bottom vertical second limiting rod 46 and the connected insert plate 47 to adjust their positions synchronously. After the insert plate 47 contacts the bottom of the winding 10, it can adapt to the size changes caused by the installation deviation of the winding 10 or thermal expansion and contraction, realize the lateral precise limiting of the winding 10, and prevent the winding 10 from shifting and causing the relative positions of the primary and secondary windings to become disordered.

[0035] The first limiting rod 42 is provided with a connecting rod 43, and the connecting rod 43 is provided with a connecting block 48 that can move relative to it. The connecting block 48 has rods on both sides and is connected to the moving frame 45. The displacement of the connecting block 48 relative to the first limiting rod 42 can synchronously drive the moving frame 45 to move. The moving frame 45 has a horizontal plate set at the bottom of the first limiting rod 42, and vertical plates extending upward on both sides of the horizontal plate. The upper end of the vertical plates has a snap-fit ​​interface that connects to the rods on both sides of the connecting block 48. The connecting rod 43 is provided with annular grooves at intervals. The inner wall of the through hole of the connecting block 48 has a deformable rubber ring. Under the action of external force, the connecting block 48 can drive the rubber ring on the inner wall of its through hole to move relative to the connecting rod 43 to different positions of the annular groove. This invention provides a moving reference for the plug-in block 48 through the plug-in rod 43 on the first limiting rod 42. The annular grooves on the rod 43 are arranged at intervals and cooperate with the deformable rubber ring on the inner wall of the through hole of the plug-in block 48. Under the action of external force, the rubber ring can deform and slide and get into different annular grooves to realize the positioning of the plug-in block 48. The rods on both sides of the plug-in block 48 are connected to the moving frame 45 through the snap-fit ​​interface at the upper end of the vertical plate of the moving frame 45. When the plug-in block 48 moves relative to the first limiting rod 42, it can synchronously drive the moving frame 45 to move smoothly along the first limiting rod 42. The horizontal plate of the moving frame 45 is attached to the bottom of the first limiting rod 42 to ensure that there is no deviation during the displacement process. In turn, it stably links the second limiting rod 46 and the plug plate 47 to adjust the limiting position of the winding 10, realizing manual adjustment during installation.

[0036] The first limiting rod 42 is provided with a horizontally aligned insertion rod 43. Both ends of the insertion rod 43 are connected to the first limiting rod 42 via bearing seats 44. The bearing seats 44 are used to fix both ends of the insertion rod 43 to prevent it from shaking, shifting, or axially moving during operation, and to maintain the horizontal accuracy and structural stability of the insertion rod 43.

[0037] The base frame 41 has an upper substrate and a lower substrate spaced apart vertically, which are connected by a connecting rod. A first limiting rod 42 is provided on the lower substrate. The base frame 41 forms a stable frame structure through the upper substrate, the lower substrate, and the connecting rod connecting the two.

[0038] A lead screw 410 is provided on the first limiting rod 42, and a lead screw nut 411 that can move relative to it is provided on the lead screw 410. Rods are provided on both sides of the lead screw nut 411 and are connected to the movable frame 45. The displacement of the lead screw nut 411 relative to the first limiting rod 42 synchronously drives the movable frame 45 to move. The movable frame 45 has a horizontal plate located at the bottom of the first limiting rod 42, and vertical plates extending upwards are provided on both sides of the horizontal plate. The upper end of the vertical plates has a locking interface for connecting to the rods on both sides of the lead screw nut 411. The lead screw nut 411 can move smoothly along the lead screw 410 with high transmission accuracy, avoiding deviations that are easy to occur during manual adjustment. The two sides of the lead screw nut 411 are firmly connected to the moving frame 45 through the locking interface at the upper end of the vertical plate of the moving frame 45, which can synchronously transmit its displacement relative to the first limit rod 42 to the moving frame 45. The horizontal plate of the moving frame 45 is attached to the bottom of the first limit rod 42, which can limit the swaying and offset of the moving frame 45 during displacement, ensuring that it moves stably along the first limit rod 42, thereby driving the second limit rod 46 and the insert plate 47 to accurately adjust the limiting position of the winding 10, and preventing the winding 10 from shifting due to limit deviation during operation.

[0039] The first limiting rod 42 is equipped with a lead screw 410 arranged horizontally therewith. The two ends of the lead screw 410 are connected to the first limiting rod 42 through bearing seats 44. The first limiting rod 42 and the lead screw 410 are kept horizontally, which can ensure that the transmission direction of the lead screw 410 is consistent with the extension direction of the first limiting rod 42, and avoid displacement of the lead screw nut 411 due to angular deviation between the two. The bearing seats 44 are used to fix the end position of the lead screw 410, reduce the radial runout and axial movement of the lead screw 410 during rotation, and ensure the operational stability of the lead screw 410.

[0040] A drive motor 49 is mounted on the upper substrate, and a first bevel gear 412 is mounted at the end of the lead screw 410. The output end of the drive motor 49 is located between the upper and lower substrates, and the output end of the drive motor 49 has a second bevel gear that meshes with the first bevel gear 412. The second bevel gear at the output end of the drive motor 49 can mesh with the first bevel gear 412 at the end of the lead screw 410, thereby transmitting the power of the drive motor 49 to the lead screw 410, causing the lead screw 410 to rotate. When the lead screw 410 rotates, the lead screw nut 411 on it can move along the lead screw 410. Through the connection between the two side rods and the vertical plate card interface of the moving frame 45, the moving frame 45 is moved synchronously along the first limiting rod 42, thereby linking the second limiting rod 46 and the insert plate 47 to adjust the limiting position of the winding 10, avoiding manual adjustment deviation and ensuring the stability of the winding 10 position.

[0041] The winding 10 has an iron core 70, and a secondary winding 13 is provided outside the iron core 70. A primary winding 12 is arranged at a distance from the outer side of the secondary winding 13. The primary winding 12 is arranged at a distance from the outer side of the secondary winding 13. This arrangement ensures the insulation performance between the primary winding 12 and the secondary winding 13, preventing short circuits caused by insulation failure during high-power operation. It also provides space for the subsequent installation of the isolation component 50, facilitating the optimization of short-circuit impedance by adjusting the spacing to adapt to different high-power load requirements. At the same time, the layered layout can shorten the magnetic flux path and reduce electromagnetic losses.

[0042] An isolation assembly 50 is provided between the secondary winding 13 and the primary winding 12. The isolation assembly 50 includes two opposing first isolation plates 51 and second isolation plates 52. First insert plates 54 are arranged around the side of the first isolation plates 51, forming slots between the first insert plates 54. The side of the second isolation plate 52 has second insert plates 53 that connect to the slots. By the opposing arrangement of the first isolation plates 51 and second isolation plates 52, the secondary winding 13 and the primary winding 12 are separated, ensuring insulation and preventing short circuits caused by insulation failure between the windings during high-power operation. Furthermore, the first insert plate 54 arranged around the side of the first isolation plate 51 forms a slot, which cooperates with the second insert plate 53 on the side of the second isolation plate 52. This allows the first isolation plate 51 and the second isolation plate 52 to be spliced ​​together, and the overall thickness of the isolation component 50 can be changed by adjusting the depth of the second insert plate 53 inserted into the slot, thereby adapting to the adjustment requirements of the primary and secondary winding spacing and short-circuit impedance under different operating conditions. At the same time, the surrounding second insert plate 53 and first insert plate 54 can make the isolation effect more uniform, reduce local leakage flux, and ensure the operating stability of the transformer under high power conditions.

[0043] See appendix Figure 9 , Figure 10As shown, auxiliary rings 56 are connected to the outer sides of both the first isolation plate 51 and the second isolation plate 52 via extension rods 55. The auxiliary rings 56 connected to the outer sides of the first isolation plate 51 and the second isolation plate 52 via extension rods 55 can form a ring-shaped support for the first isolation plate 51 and the second isolation plate 52. The auxiliary rings 56 can disperse the stress generated by electromagnetic force or vibration in the first isolation plate 51 and the second isolation plate 52 during high-power operation, and prevent local deformation or misalignment of the two isolation plates.

[0044] The first insert plate 54 has balls 57 arranged in sequence on its side, and the second insert plate 53 has a groove that allows the balls 57 to move. The balls 57 can roll along the groove, converting the sliding friction between the first insert plate 54 and the second insert plate 53 into rolling friction, reducing the resistance when the two move relative to each other. In addition, rolling friction can reduce wear between the insert plates and ensure that the two insert plates fit tightly and do not shift during movement.

[0045] Example 2:

[0046] This embodiment includes the content of Embodiment 1, and is a further improvement based on Embodiment 1.

[0047] See appendix Figure 1 As shown, the adaptive high-power three-phase isolation transformer has three windings 10, which are connected to each other by a mounting link 11 on their outer sides; at least one winding 10 of the adaptive high-power three-phase isolation transformer is provided with a limiting component 40.

[0048] Example 3:

[0049] This embodiment includes the content of Embodiment 1, and is a further improvement based on Embodiment 1.

[0050] An auxiliary isolation plate 60 is also provided between the secondary winding 13 and the primary winding 12. The auxiliary isolation plate 60 can further improve the insulation strength between the secondary winding 13 and the primary winding 12, avoiding the risk of insulation failure and breakdown between the windings due to electromagnetic stress or temperature rise during high-power operation; on the other hand, the distance between the secondary winding 13 and the primary winding 12 can be adjusted by selecting auxiliary isolation plates 60 of different thicknesses.

[0051] Example 4:

[0052] This embodiment includes the content of Embodiment 1, and is a further improvement based on Embodiment 1.

[0053] The cross-sections at both ends of the first insert plate 54 may partially overlap or not overlap in the vertical projection. The first insert plate 54 and the second insert plate 53 have the same structural shape, and the cross-sections at both ends of the second insert plate 53 may partially overlap or not overlap in the vertical projection. This allows the first insert plate 54 and the second insert plate 53 to rotate accordingly as the distance between them changes, which helps them resist electromagnetic forces and vibrations during high-power operation and reduces the risk of loosening at the joint.

[0054] Example 5:

[0055] This embodiment includes the content of Embodiment 1, and is a further improvement based on Embodiment 1.

[0056] When there are multiple isolation components 50 between the secondary winding 13 and the primary winding 12, the isolation components 50 can be connected by an extension partition 80. See the attached diagram for a detailed schematic. Figure 11 As shown, multiple isolation components 50 are all located on the same side of the extended isolation plate 80. The surfaces of the first isolation plate 51 and the second isolation plate 52 are each provided with annular slots. Both the first isolation plate 51 and the second isolation plate 52 can be detachably connected to the extended isolation plate 80 via snap-fit ​​connections. The extended isolation plate 80 has corresponding snap-fit ​​holes. When multiple isolation components 50 exist between the secondary winding 13 and the primary winding 12, the fact that all isolation components 50 are located on the same side of the extended isolation plate 80 ensures that each isolation component 50 is neatly distributed between the primary and secondary windings, avoiding positional shifts caused by dispersed placement.

[0057] Example 6:

[0058] This embodiment includes the content of Embodiment 1, and is a further improvement based on Embodiment 1.

[0059] See appendix Figure 1 As shown, the limiting component 40 provided on the outer side of the winding 10 has 3 second limiting rods 46; the adaptive high-power three-phase isolation transformer has the limiting component 40 on at least two windings 10.

[0060] It should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0061] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any way. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as the technology or embodiments that are substantially the same as the present invention.

[0062] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. An adaptive high-power three-phase isolation transformer, comprising a winding (10), wherein the winding (10) is provided with an upper yoke fixing structure (30) and a lower yoke fixing structure (20) at the top and bottom respectively, characterized in that, The upper yoke fixing structure (30) is provided with a limiting component (40), the limiting component (40) includes a base frame (41), the base frame (41) is provided with at least two horizontally placed first limiting rods (42) on the side, the first limiting rods (42) are provided with a movable frame (45) that can move relative to them, the bottom of the movable frame (45) is provided with a vertically arranged second limiting rod (46), the bottom of the second limiting rod (46) is connected to a plug plate (47), the plug plate (47) is in contact with the bottom of the winding (10); The winding (10) has an iron core (70), and a secondary winding (13) is provided outside the iron core (70). A primary winding (12) is provided at intervals outside the secondary winding (13). An isolation assembly (50) is provided between the secondary winding (13) and the primary winding (12). The isolation assembly (50) includes two opposing first isolation plates (51) and a second isolation plate (52). The first isolation plate (51) has a first insert plate (54) arranged around its side, and a slot is formed between the first insert plates (54). The second isolation plate (52) has a second insert plate (53) connected to the slot on its side.

2. The adaptive high-power three-phase isolation transformer according to claim 1, characterized in that, The first limiting rod (42) is provided with a plug rod (43), and the plug rod (43) is provided with a plug block (48) that can move relative to it. The plug block (48) has rods on both sides and is connected to the moving frame (45). The plug block (48) moves relative to the first limiting rod (42) and can synchronously drive the moving frame (45) to move.

3. The adaptive high-power three-phase isolation transformer according to claim 2, characterized in that, The first limiting rod (42) is provided with a plug rod (43) arranged horizontally therewith, and the two ends of the plug rod (43) are connected to the first limiting rod (42) through bearing seats (44).

4. The adaptive high-power three-phase isolation transformer according to claim 1, characterized in that, The base frame (41) has an upper substrate and a lower substrate spaced apart vertically, and the upper substrate and the lower substrate are connected by a connecting rod. The first limiting rod (42) is provided on the lower substrate.

5. The adaptive high-power three-phase isolation transformer according to claim 4, characterized in that, The first limiting rod (42) is provided with a lead screw (410), and the lead screw (410) is provided with a lead screw nut (411) that can move relative to it. The lead screw nut (411) has rods on both sides and is connected to the moving frame (45). The lead screw nut (411) moves relative to the first limiting rod (42) and can synchronously drive the moving frame (45) to move.

6. The adaptive high-power three-phase isolation transformer according to claim 5, characterized in that, The first limiting rod (42) is provided with a lead screw (410) arranged horizontally therewith, and the two ends of the lead screw (410) are connected to the first limiting rod (42) through bearing seats (44).

7. The adaptive high-power three-phase isolation transformer according to claim 6, characterized in that, The upper substrate is provided with a drive motor (49), the end of the lead screw (410) is provided with a first bevel gear (412), the output end of the drive motor (49) is located between the upper substrate and the lower substrate, and the output end of the drive motor (49) has a second bevel gear that meshes with the first bevel gear (412).

8. The adaptive high-power three-phase isolation transformer according to claim 1, characterized in that, The first insert plate (54) has balls (57) arranged in sequence on its side, and the second insert plate (53) has a groove that allows the balls (57) to move.

9. The adaptive high-power three-phase isolation transformer according to claim 1, characterized in that, An auxiliary isolation plate (60) is provided between the secondary winding (13) and the primary winding (12).

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