High-capacity high-frequency transformer

Abstract

The utility model provides a high-capacity high-frequency transformer which comprises a pressing plate arranged at the top of a transformer body. One side of the pressing plate is provided with a through hole for installing a capacitor; the copper bar is arranged right below the through hole; the quick positioning device is arranged on the top surface of the pressing plate and surrounds the through hole; and the guide grooves penetrate through the pressing plate and are uniformly distributed around the through hole. The rapid positioning device is arranged on the end face, close to the through hole, of the pressing plate, so that fixing and rapid centering of the capacitor can be achieved, two hands can be liberated at the moment, the situation that the capacitor is screwed into the through hole in the copper bar in a spiral mode is emphatically observed, and installation of the capacitor can be completed only by screwing bolts into the through hole in the copper bar and a threaded hole in the bottom of the capacitor.

Description

Technical Field

[0001] This utility model relates to the technical field of high-frequency transformers, and in particular to a large-capacity high-frequency transformer. Background Technology

[0002] As a core component of power electronic transformers and isolated DC-DC converters, the key technologies of large-capacity high-frequency transformers directly affect the performance of the entire power electronic equipment. Due to the high operating frequency of high-frequency transformers, their high-frequency noise and electromagnetic interference problems are particularly significant. In practical applications, capacitors are often added to the transformer body to suppress noise and improve stability.

[0003] The capacitor is installed using a pressure plate on the transformer body. The pressure plate has pre-drilled through holes, into which the capacitor is embedded. The bottom of the capacitor is connected to the transformer copper busbar located at the bottom of the pressure plate, thus completing the final installation of the capacitor.

[0004] However, during the installation of the capacitor, the capacitor needs to be aligned with the center of the through hole and the mounting hole on the copper busbar before being tightened with bolts. The operator often needs to hold the capacitor with one hand and turn the bolt with the other, which is difficult to operate. It is also difficult to observe the stability of the capacitor embedded in the through hole and whether the bolt is screwed into the threaded hole at the bottom of the capacitor at the same time. If the bottom of the capacitor is not aligned with the center of the through hole during the tightening process, the bolt will be misaligned during tightening, which will cause a short circuit in the capacitor. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art that when installing capacitors on a pressure plate, especially when using bolts for fastening, it is difficult to conveniently align the through hole at the bottom of the capacitor with the through hole on the pressure plate and the hole on the copper busbar.

[0006] To achieve the above objectives, this application proposes a high-capacity high-frequency transformer, comprising: a pressure plate disposed on the top of the transformer body, with a through hole on one side of the pressure plate for mounting a capacitor; a copper busbar disposed directly below the through hole; characterized in that it further comprises: a quick positioning device that is close to the top surface of the pressure plate and surrounds the through hole; and a guide groove that penetrates the pressure plate and is evenly distributed around the circumference of the through hole.

[0007] The quick positioning device includes: a connecting plate, comprising a first extension and a second extension arranged in a V-shape, the first extension and the second extension forming a 120° angle, and six connecting plates connected end to end to form a regular hexagonal structure; a dovetail block collinear with the perpendicular bisector of the hexagonal edge and penetrated by the ends of two adjacent connecting plates; a cylinder connecting the end face of the dovetail block; a limiting block fitted into the bottom of the dovetail block and tightly abutting the surface of the pressure plate; and a guide post located at the apex of the V-shaped structure of the connecting plate and embedded in a guide groove; when the cylinder drive shaft drives the connecting plate, the first extension and the second extension move relative to each other along the hexagonal edge.

[0008] This application utilizes a quick positioning device on the end face of the pressure plate near the through hole to achieve fast fixing and alignment of the capacitor. When installing the capacitor on the copper busbar, the center of the through hole on the pressure plate is first located using the quick positioning device. Using this as a reference, the hole on the copper busbar is quickly aligned with the center of the through hole. Then, the capacitor is inserted into the through hole, and the quick positioning device is activated to clamp and fix the capacitor. At this point, the hands are freed, and the focus is on observing the spiral screwing into the through hole on the copper busbar. The installation of the capacitor can be completed simply by screwing the bolt into the through hole on the copper busbar and the threaded hole at the bottom of the capacitor. This solves the problem in the prior art where it is difficult to conveniently align the capacitor with the through hole on the pressure plate and the hole on the copper busbar when installing the capacitor on the pressure plate, thus improving the stability when screwing in the bolt.

[0009] Furthermore, as an improvement to the aforementioned connecting plate, in order to reduce the space occupied by the connecting plate, two adjacent connecting plates are connected to the dovetail block by overlapping.

[0010] Furthermore, as an improvement to the aforementioned connecting plate, in order to optimize the adaptability of the connecting plate under different working conditions, the way in which two adjacent connecting plates are connected to the dovetail block includes at least one of overlapping, nested sliding, and relative sliding.

[0011] Furthermore, as an improvement to the aforementioned connecting plate, in order to make the connecting plate easier to assemble and to make the connecting plate flatter after assembly, when two adjacent connecting plates overlap, the first extension overlaps the second extension, and the lowest horizontal plane of the first extension is flush with the highest horizontal plane of the second extension.

[0012] Furthermore, as an improvement to the dovetail block, in order to reduce the resistance of the dovetail block to the movement of the connecting plate, the dovetail block is provided with a square hole for passing through the overlapping part of the first extension and the second extension; the height of the square hole is greater than the sum of the overlapping thickness of the first extension and the second extension.

[0013] Furthermore, in order to improve the symmetry of the connecting plate and thus improve the ease of assembly, the first extension and the second extension are of equal length.

[0014] Furthermore, in order to make full use of the length of the guide groove to clamp capacitors of different diameters, when the first extension and the second extension move relative to each other along the hexagonal edge, the guide post moves in the guide groove, and the overlapping area of ​​the first extension and the second extension gradually increases. When the guide post moves to the end of the guide groove, the first extension and the second extension completely overlap.

[0015] Furthermore, in order to achieve three-point positioning, each of the three dovetail blocks spaced apart from each other is provided with a positioning rod of equal length at the end near the through hole.

[0016] Furthermore, in order to improve the smoothness of the movement of the rapid positioning device, the guide post is welded at the junction of the first extension and the second extension.

[0017] The beneficial effects of this application are as follows:

[0018] 1. This application achieves the fixation and rapid alignment of the capacitor by setting a quick positioning device on the end face of the pressure plate near the through hole. When installing the capacitor on the copper busbar, first use the quick positioning device to find the center of the through hole on the pressure plate. Use this as a reference to quickly adjust the hole on the copper busbar to align with the center of the through hole. Then, insert the capacitor into the through hole and activate the quick positioning device to clamp and fix the capacitor. At this time, the hands can be freed, and the focus can be on observing the spiral screw into the through hole on the copper busbar. The installation of the capacitor can be completed by simply screwing the bolt into the through hole on the copper busbar and the threaded hole at the bottom of the capacitor.

[0019] 2. The dovetail block of this application is provided with three positioning rods at its end, which can achieve three-point positioning and increase the clamping force, making the clamping more stable.

[0020] 3. The quick positioning device of this application is easy to assemble and can be reused. When installing capacitors on many high-frequency transformers of the same specifications, only one quick positioning device needs to be assembled to achieve the centering and installation of capacitors on the same batch of transformers.

[0021] 4. The quick positioning device of this application has a symmetrical structure, a simple form, and is easy to disassemble. Since the connecting plates are not rigidly connected, they can be disassembled and stored when not in use, without taking up extra space. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a high-capacity high-frequency transformer concealing a rapid positioning device in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the rapid positioning device in the embodiments of this application;

[0025] Figure 3 This is a structural schematic diagram of a large-capacity high-frequency transformer from another perspective in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the connecting plate in an embodiment of this application;

[0027] Figure 5 This is a partial cross-sectional view of the dovetail block and connecting plate in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Pressure plate;

[0030] 2. Through hole;

[0031] 3. Copper busbar;

[0032] 4. Quick positioning device; 41. Cylinder; 42. Connecting plate; 421. First extension; 422. Second extension; 43. Dovetail block; 431. Square hole; 432. Positioning rod; 44. Limiting block; 45. Guide post; 5. Guide groove. Detailed Implementation

[0033] The following will be combined with the appendix Figures 1-5 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1:

[0035] like Figures 1-3As shown, this utility model provides a large-capacity high-frequency transformer. To achieve three-point positioning and adaptive clamping of the capacitor using a rapid positioning device, this application utilizes six connecting plates 42 forming a regular hexagon (ended to end) and three spaced positioning rods 431 in the rapid positioning device 4. This achieves three-point positioning of the capacitor, aligning the capacitor's mounting holes with the copper busbar through-holes and upper pressure plate through-holes on the transformer. When the cylinder 41 is activated, the extension and retraction of the cylinder 41's output end causes the dovetail block 43 to slide within the limiting block 44. Simultaneously, the square hole 431 on the dovetail block 43 causes the regular hexagon formed by the connecting plates 42 to contract and expand. The movement of the connecting plates 42 causes the guide post 45 to slide within the guide groove 5. When the guide post 45 moves towards the center of the through-hole 2, the six vertices of the regular hexagon contract synchronously, causing the three positioning rods 431 to evenly abut against the outer wall of the capacitor. When the guide post 45 moves away from the center of the through-hole 2, the six vertices of the regular hexagon expand synchronously, causing the three positioning rods 431 to move away from the outer wall of the capacitor. Because the first extension 421 and the second extension 422 of the connecting plate 42 adjust the position of the positioning rod 431 through relative movement, even if there is a slight deviation in the capacitor diameter, the clamping force can be adaptively adjusted through the sliding cooperation of the dovetail block 43 and the limiting block 44, avoiding damage to the capacitor caused by rigid contact. This structure ensures that the capacitor axis is aligned with the center of the through hole 2, providing a reference for subsequent bolt tightening.

[0036] Furthermore, before installing the capacitor, the copper busbar hole position needs to be pre-adjusted using the quick positioning device 4. Specifically, the quick positioning device 4 is first installed on the pressure plate 1, and the guide post 45 is embedded in the guide groove 5. The cylinder 41 is activated to move the guide post 45 to the end of the guide groove 5 near the center of the through hole 2. When the three positioning rods 432 approach each other and converge at a point, the center of the through hole 2 is found. Using this as a reference point, the position of the mounting hole on the copper busbar 3 is adjusted. When the copper busbar 3 is connected to the transformer, an elongated hole is reserved, which allows the position of the copper busbar 3 to be adjusted, thereby aligning the mounting hole on the copper busbar 3 with the center of the through hole 2.

[0037] Furthermore, the cylinder 1 is retracted, which in turn pulls the quick positioning device 4 to expand, causing the ends of the three positioning rods 432 that converge at one point to open.

[0038] Furthermore, the capacitor is placed in the through hole 2, and the cylinder is activated to push the quick positioning device 4 to retract. The three positioning rods 432 gradually come into contact with the capacitor wall, correcting the capacitor position and clamping the capacitor. At this time, there is no need to manually adjust the capacitor position and press the capacitor. Just bend over to observe the position of the through hole on the copper busbar, screw the bolt into the through hole and the threaded hole at the bottom of the capacitor, and the capacitor installation can be completed.

[0039] Furthermore, after the capacitor is installed, cylinder 41 is activated, and the quick positioning device 4 can be removed.

[0040] Furthermore, the dovetail block 43 adopts two different shapes that alternately cooperate. The dovetail block with the positioning rod 432 is longer in shape. This design allows the positioning rod 432 to be closer to the outer wall of the capacitor when correcting the position. The shorter dovetail block 43 does not have the positioning rod 432 installed on it, so it only serves as a connector for the drive connection plate 42 and can be provided with a square hole 431.

[0041] Example 2:

[0042] like Figure 1 , Figure 4 As shown, in order to improve the stability of movement and the compactness of the structure through the design of the stepped connecting plate, the first extension 421 and the second extension 422 of the connecting plate 42 of this application have the same thickness and are flush horizontally after overlapping, so that there is no height difference interference between adjacent connecting plates 42 during movement. When the cylinder 41 drives the connecting plate 42 to move, the guide post 45 slides along the straight trajectory of the guide groove 5, and the stepped overlapping structure reduces the lateral displacement of the connecting plate 42 through the limiting effect of the dovetail block 43. At the same time, the guide post 45 is welded at the junction of the first extension 421 and the second extension 422, further strengthening the rigidity of the connection point and avoiding structural deformation caused by uneven force during movement, thereby improving the overall stability of the quick positioning device 4.

[0043] Furthermore, to reduce frictional resistance and prevent displacement through the cooperation of the dovetail block and the limiting block, the dovetail block 43 penetrates the square holes 431 at both ends of the adjacent connecting plate 42, and its height is greater than the total thickness of the connecting plates, providing vertical movement space for the sliding of the connecting plate 42. The limiting block 44 is fitted into the bottom of the dovetail block 43 and closely abuts the surface of the pressure plate 1, which not only restricts the longitudinal displacement of the dovetail block 43, but also reduces frictional resistance through its planar contact. This structure ensures that the connecting plate 42 only moves along the direction of the guide groove 5 under the action of the cylinder 41, avoiding positioning errors caused by multi-degree-of-freedom motion. At the same time, the cooperation design between the dovetail block 43 and the limiting block 44 allows for long-term use without easy wear.

[0044] As a preferred embodiment, when the size of the clamped capacitor is too large and the diameter of the through hole 2 is large, two adjacent connecting plates 42 can be connected to the dovetail block 43 in a nested sliding manner. That is, the first extension 421 and the second extension 422 of the two connecting plates 42 are connected in a nested manner. First, the cross-sectional area of ​​the first extension 421 is larger than that of the second extension 422. According to the shape and size of the cross-section of the second extension 422, the first extension 421 is hollowed out so that the second extension 421 can be nested into the first extension 421. At the same time, the shape and size of the square hole on the dovetail block 43 are the same as the cross-section of the first extension 421. During installation, the first extension 421 is first completely passed through the square hole 431. Then, the second extension 422 of the other connecting plate 42 is inserted into the hollow cavity opened in the first extension 421. Then, the position where the first extension 421 and the second extension 422 meet is moved into the square hole 431. Then, the connecting plates 42 are combined in sequence in the above manner to form a regular hexagonal structure. The nested sliding method makes each edge of the regular hexagon more stable, so that when the first extension 421 and the second extension 422 move relative to each other, the second extension 422 is covered by the hollow cavity of the first extension 421, which helps to increase the stability of the quick positioning device 4 during movement, thereby increasing the stability during the clamping process of the capacitor.

[0045] As a preferred solution, when the size of the clamped capacitor is too small and a large relative movement between the first extension 421 and the second extension 422 is not required, the two adjacent connecting plates 42 can be connected to the dovetail block 43 by relative sliding. The relative movement of the first extension 421 and the second extension 422 only needs to be confined within the square hole 431 in the dovetail block 43. This can be achieved by installing a slide rail within the square hole 431 and mounting the first extension 421 and the second extension 422 at both ends of the slide rail. The maximum distance the first extension 421 and the second extension 422 can move is equal to the depth of the square hole, i.e., from the moment the first extension 421 and the second extension 422 just touch the square hole 431 until their ends contact each other. This distance represents the maximum movement distance of the first extension 421 and the second extension 422.

[0046] Example 3:

[0047] Please refer to Figure 1To achieve compatibility with multiple capacitor sizes through optimized guide groove and step length, the first extension 421 and the second extension 422 are of equal length and their ends are movable to the junction. Combined with the travel range of the guide groove 5, the retraction diameter of the quick positioning device 4 is adjustable. When the guide post 45 moves to the end of the guide groove 5 near the through hole 2, the inner diameter of the regular hexagon formed by the connecting plates 42 is at its minimum, suitable for small-diameter capacitors; conversely, when the guide post 45 moves away from the through hole 2, the inner diameter increases, accommodating larger capacitors. The position of the guide post 45 is precisely controlled by the cylinder 41, allowing users to quickly switch clamping ranges without replacing parts, significantly improving the device's versatility.

[0048] Furthermore, to facilitate rapid assembly and storage of the modular connecting plate design, the connecting plate 42 adopts an overlapping modular design. Disassembly only requires separating the overlapping portion of the first extension 421 and the second extension 422 to decompose it into independent hexagonal units. Since the dovetail block 43 and the limiting block 44 are separate structures, they can be disassembled and stored when not in use, reducing space occupation. In addition, the stepped interface design of the connecting plate 42 ensures overall flatness after assembly without the need for precision machining, reducing maintenance costs.

[0049] Furthermore, to ensure the capacitor installation is secure and prevented from loosening, the three positioning rods 431 form a stable triangular support when clamping the capacitor. After their ends abut against the outer wall of the capacitor, the bottom of the capacitor automatically aligns with the mounting hole of the copper busbar 3. Since the copper busbar 3 is located directly below the through hole 2, the capacitor is radially constrained by the positioning rods 431 during bolt insertion, preventing displacement. This ensures the bolt is screwed vertically into the threaded hole even with one hand. Additionally, elastic washers can be added to the ends of the positioning rods 431 to further absorb vibration and prevent poor contact due to loosening during long-term use.

[0050] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-capacity high-frequency transformer, comprising: A pressure plate (1) is set on the top of the transformer body, and a through hole (2) is opened on one side of the pressure plate (1) for installing capacitors; a copper busbar (3) is set directly below the through hole (2); characterized in that it also includes: a quick positioning device (4) that is close to the top surface of the pressure plate (1) and surrounds the through hole (2); and a guide groove (5) that penetrates the pressure plate (1) and is evenly distributed around the circumference of the through hole (2); The rapid positioning device (4) includes: a connecting plate (42), including a first extension (421) and a second extension (422) distributed in a V-shape, the first extension (421) and the second extension (422) forming a 120° angle, and the six connecting plates (42) are connected end to end to form a regular hexagonal structure; a dovetail block (43) collinear with the perpendicular bisector of the regular hexagonal edge and penetrated by the ends of two adjacent connecting plates (42); a cylinder (41) connecting the end face of the dovetail block (43); a limiting block (44) fitted into the bottom of the dovetail block (43) and closely attached to the surface of the pressure plate (1); and a guide post (45) located at the apex of the V-shaped structure of the connecting plate (42) and embedded in the guide groove (5); when the cylinder (41) drives the connecting plate (42), the first extension (421) and the second extension (422) move relative to each other along the hexagonal edge.

2. The high-capacity high-frequency transformer according to claim 1, characterized in that, The two adjacent connecting plates (42) are connected to the dovetail block (43) by overlapping.

3. The high-capacity high-frequency transformer according to claim 2, characterized in that, The way in which two adjacent connecting plates (42) are connected to the dovetail block (43) includes at least one of overlapping, nested sliding, and relative sliding.

4. The high-capacity high-frequency transformer according to claim 2, characterized in that, When two adjacent connecting plates (42) overlap, the first extension (421) overlaps the second extension (422), and the lowest horizontal plane of the first extension (421) is flush with the highest horizontal plane of the second extension (422).

5. The high-capacity high-frequency transformer according to claim 1, characterized in that, The dovetail block (43) has a square hole (431) for passing through the overlapping part of the first extension (421) and the second extension (422); the height of the square hole (431) is greater than the sum of the overlapping thickness of the first extension (421) and the second extension (422).

6. The high-capacity high-frequency transformer according to claim 1, characterized in that, The first extension (421) and the second extension (422) are of equal length.

7. The high-capacity high-frequency transformer according to claim 6, characterized in that, When the first extension (421) and the second extension (422) move relative to each other along the hexagonal edge, the guide post (45) moves in the guide groove (5), and the overlapping area of ​​the first extension (421) and the second extension (422) gradually increases. When the guide post (45) moves to the end of the guide groove (5), the first extension (421) and the second extension (422) completely overlap.

8. The high-capacity high-frequency transformer according to claim 1, characterized in that, Any three dovetail blocks (43) spaced apart from each other are provided with positioning rods (432) of equal length at the end near the through hole (2).

9. The high-capacity high-frequency transformer according to claim 1, characterized in that, The guide post (45) is welded at the junction of the first extension (421) and the second extension (422).

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