Medium-frequency transformer, assembling method thereof, parameter setting method, equipment and storage medium

Abstract

The invention relates to an intermediate frequency transformer, an assembling method thereof, a parameter setting method, equipment and a storage medium. The medium-frequency transformer comprises an iron core with a rectangular section and a stepping opening, and the iron core is of a multi-stage stepping structure and is formed by splicing and stacking ultrathin oriented silicon steel laminations with the thickness smaller than or equal to 0.10 mm; the iron core comprises an upper iron yoke, a lower iron yoke, a first iron core column and a second iron core column which form a rectangular frame, and corner bends arranged at four corners of the rectangle; the iron yoke clamping pieces are positioned on the two sides of the upper iron yoke and the lower iron yoke; and the high-voltage coil and the low-voltage coil are concentrically wound on the first iron core column and the second iron core column. According to the medium-frequency transformer core, the design flux density is remarkably improved, the size and weight are greatly reduced, and the power density is higher. According to the assembling method of the medium-frequency transformer, the assembling precision of the high-capacity ultrathin oriented silicon steel medium-frequency transformer is ensured by strictly limiting the assembling steps, and the assembling method is suitable for large-scale production.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and specifically to a medium-frequency transformer and an assembly method, parameter setting method, equipment and storage medium thereof. Background Art

[0002] Medium-frequency transformers are primarily used in renewable energy power generation and grid-connected equipment, providing voltage isolation, conversion, and power transmission. They operate at a medium frequency of 400 to 1000 Hz. Compared to industrial frequency transformers, medium-frequency transformers offer advantages such as smaller size and lighter weight, making them crucial for increasing the power density of renewable energy power generation and grid-connected equipment. Existing large-capacity medium-frequency transformers typically use conventionally thick grain-oriented silicon steel (0.20 mm to 0.27 mm thick) as the core material, manufactured using a laminated core structure. The core, coils, and overall assembly methods are similar to those of conventional industrial frequency transformers. Because conventionally thick grain-oriented silicon steel exhibits relatively high losses at medium frequencies, existing core designs have a lower magnetic flux density to prevent core overheating. This results in large size and weight for large-capacity medium-frequency transformers, resulting in low power density. Ultra-thin grain-oriented silicon steel, with its low medium-frequency losses, is particularly suitable for the manufacture of large-capacity, high-power-density medium-frequency transformers. However, the thinness of ultra-thin grain-oriented silicon steel (≤0.10 mm) prevents existing cross-cutting and lamination precision requirements, making traditional laminated core structures and transformer assembly methods unsuitable. The lack of large-capacity medium-frequency transformers and assembly methods suitable for ultra-thin oriented silicon steel materials makes it difficult to give full play to the advantages of low medium-frequency loss of ultra-thin oriented silicon steel, and it is difficult to increase the power density of large-capacity medium-frequency transformers.

[0003] In summary, the problems of large volume and low power density of large-capacity medium-frequency transformers need to be solved urgently. Summary of the Invention

[0004] To solve the above technical problems, the present invention proposes a medium frequency transformer, comprising:

[0005] The core has a rectangular cross-section and a stepped opening. The core has a multi-stage stepped structure and is assembled and stacked from ultra-thin oriented silicon steel laminations with a thickness of ≤0.10mm. The core includes an upper iron yoke, a lower iron yoke, a first iron core leg, a second iron core leg, and corner bends at the four corners of the rectangle.

[0006] Iron yoke clamps located on both sides of the upper iron yoke and the lower iron yoke;

[0007] A high-voltage coil and a low-voltage coil are concentrically wound around the first iron core leg and the second iron core leg.

[0008] Furthermore, the invention further comprises a water-cooling member, wherein the water-cooling member comprises a first water-cooling member and a second water-cooling member, wherein the first water-cooling member and the second water-cooling member respectively surround and clamp the first core column and the second core column;

[0009] A water inlet pipe and a water return pipe are located on both sides of the iron core and are used to supply water to the water cooling component, and a connecting hose is provided to connect the water inlet pipe and the water return pipe.

[0010] Furthermore, the first core leg and the second core leg are a multi-stage stepped structure with symmetrical spatial distribution.

[0011] Furthermore, the stepping method is 1 piece 1 stack, and the stepping interval is 10 to 20 mm.

[0012] Furthermore, the iron yoke clamp includes a first upper iron yoke clamp, a second upper iron yoke clamp, a first lower iron yoke clamp and a second lower iron yoke clamp; the first upper iron yoke clamp and the second upper iron yoke clamp interact with each other to clamp the upper iron yoke; the first lower iron yoke clamp and the second lower iron yoke clamp interact with each other to clamp the lower iron yoke.

[0013] Furthermore, the first upper iron yoke clamp is connected to the second upper iron yoke clamp through a first transverse pull screw located at both ends of the upper iron yoke clamp, and the axial direction of the first transverse pull screw is parallel to the thickness direction of the iron core; the first lower iron yoke clamp is connected to the second lower iron yoke clamp through a second transverse pull screw located at both ends of the lower iron yoke clamp, and the axial direction of the second transverse pull screw is parallel to the thickness direction of the iron core.

[0014] Furthermore, the high-voltage coil includes a first rectangular high-voltage coil and a second rectangular high-voltage coil; the low-voltage coil includes a first rectangular low-voltage coil and a second rectangular low-voltage coil; the first rectangular high-voltage coil and the first rectangular low-voltage coil are mounted on the first iron core column; the second rectangular high-voltage coil and the second rectangular low-voltage coil are mounted on the second iron core column.

[0015] Furthermore, the first water-cooling element includes a first side plate located outside the core and closely attached to the first core leg, a second side plate and a third side plate connected to the first side plate and closely attached to the first core leg, and a fourth side plate located inside the core and opposite to the first side plate and closely attached to the first core leg;

[0016] The first side plate, the second side plate, the third side plate, and the fourth side plate are fixedly connected to each other and connected to the water inlet pipe and the water return pipe through water pipes;

[0017] The second water-cooling element has the same structure as the first water-cooling element and is symmetrically arranged around the second core column.

[0018] Furthermore, the second side plate and the third side plate are provided with a first mounting claw and a second mounting claw, and the first water-cooling component is connected to the first upper iron yoke clamp and the second upper iron yoke clamp via the first mounting claw and the second mounting claw.

[0019] Furthermore, the first upper iron yoke clamp and the second upper iron yoke clamp are connected to the first lower iron yoke clamp and the second lower iron yoke clamp via a plurality of longitudinal pull screws located at both ends of the upper iron yoke clamp, and the axial direction of the longitudinal second upper iron yoke clamp is parallel to the height direction of the iron core;

[0020] The first water-cooling element is connected to the second water-cooling element through third transverse pull screws located at both ends of the water-cooling element, and the axial direction of the third transverse pull screws is parallel to the width direction of the core.

[0021] Furthermore, an upper iron yoke support plate is provided between the first upper iron yoke clamp, the second upper iron yoke clamp and the upper iron yoke;

[0022] A first lower yoke support plate is provided between the first lower yoke clamp, the second lower yoke clamp and the lower yoke, and a second lower yoke support plate is provided at the bottom of the first lower yoke clamp and the second lower yoke clamp;

[0023] A first support frame and a second support frame are provided at both ends of the bottom of the lower iron yoke clamp, and a third support frame is provided at the bottom of the second lower iron yoke support plate.

[0024] Furthermore, the space between the second lower iron yoke support plate and the lower iron yoke is filled with an E-shaped rubber pad.

[0025] Furthermore, the iron yoke clamp includes a web, reinforcement ribs, and a plurality of limbs with I-shaped cross sections distributed along the length direction of the web;

[0026] The limb plates are distributed at the locations of the longitudinal pulling screws and are used for pressing the coils.

[0027] The present invention also provides a method for adjusting the parameters of the intermediate frequency transformer, comprising the following steps:

[0028] Determine core parameter data, wherein the core parameter data includes: core window width W, core window height H, core thickness D and thickness E of ultra-thin oriented silicon steel laminations;

[0029] Determine the number of ultra-thin oriented silicon steel laminations DT based on the thickness D of the core laminations and the thickness E of the ultra-thin oriented silicon steel laminations;

[0030] The number of lamination groups i, the number of laminations in each group m, and the corresponding dimensions of each lamination at the upper yoke, lower yoke, first core leg, second core leg, and corner bends are determined based on the core window width W and the core window height H.

[0031] Furthermore, the dimensions of each laminate include:

[0032] The length of the ultra-thin oriented silicon steel lamination located in the upper middle portion of the first core column 103 is

[0033] The length of the ultra-thin oriented silicon steel lamination located at the upper corner 105 of the first core column 103 is

[0034] The length of the ultra-thin oriented silicon steel laminations in the upper iron yoke 101

[0035] The length of the ultra-thin oriented silicon steel lamination at the right corner 105 of the upper iron yoke 101 is

[0036] The length of the ultra-thin oriented silicon steel lamination located in the upper middle portion of the second core column 104 is

[0037] The length of the ultra-thin oriented silicon steel laminations located in the lower middle portion of the second core column 104 is

[0038] The length of the ultra-thin oriented silicon steel lamination at the lower corner 105 of the second core column 104 is

[0039] The length of the ultra-thin oriented silicon steel laminations in the lower iron yoke 102

[0040] The length of the ultra-thin oriented silicon steel lamination at the left corner 105 of the lower iron yoke 101 is

[0041] The length of the ultra-thin oriented silicon steel laminations located in the lower middle portion of the first core column 103 is

[0042] Where n represents the nth stack counting from the inside out.

[0043] Furthermore, the number of laminations DT is determined according to the following calculation formula:

[0044]

[0045] in, Indicates rounding up to the smallest integer greater than or equal to a.

[0046] Furthermore, the calculation method of the number of lamination groups i, the number of laminations in each group m and the size of each lamination is:

[0047] Based on the core window width W and core window height H, set The initial length is y, The initial length of the core is d, and the bending angle of the core is AN. Calculate the size of the first lamination:

[0048] Based on the size of the first laminate, set the step spacing to x and calculate the size of the nth laminate;

[0049] After completing the bending size calculation for each piece, make the following judgments:

[0050] like Then continue to calculate the bending size of the next piece;

[0051] like The calculation of the size of the first set of laminations is then completed, and the number m of laminations in each set is determined;

[0052] Calculate the number of lamination groups i based on the number of laminations DT and the number of laminations in each group m;

[0053] If the number of stacks DT is divisible by the number of stacks in each group m, then the number of stacks in each group is m;

[0054] If the number of laminations DT is not divisible by the number of laminations in each group m, then the number of laminations in the 2nd to i-1th groups is m, and the number of laminations in the i-th group is r;

[0055] Based on the first set of lamination dimensions and the stepping pitch x, the lamination dimensions of each set are calculated.

[0056] Furthermore, the size of the first set of laminations is calculated according to the following formula:

[0057]

[0058] in,

[0059] Furthermore, the lamination size of the i-th group is calculated according to the following formula:

[0060]

[0061] Among them, j = 2, 3…i; k = 1, 2, 3…, m.

[0062] The present invention also provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0063] The memory is used to store one or more programs;

[0064] When the one or more programs are executed by the at least one processor, the parameter setting method of the medium frequency transformer is implemented.

[0065] The present invention also provides a readable storage medium on which an execution program is stored. When the execution program is executed, the parameter setting method of the medium frequency transformer is implemented.

[0066] The present invention also provides a method for assembling the large-capacity ultra-thin oriented silicon steel medium-frequency transformer, comprising the following steps:

[0067] Put the high-voltage coil on the low-voltage coil respectively, and place them horizontally on a horizontal assembly table, with the placement positions symmetrical on the left and right;

[0068] Place the third side plate of the first water-cooling element horizontally against the bottom of the first rectangular low-voltage coil, and place the fourth side plate upright against the right side of the first rectangular low-voltage coil. Securely connect the third and fourth side plates. Install the two symmetrical side plates of the second water-cooling element in the same manner.

[0069] Install one end of the first upper iron yoke clamp to the second mounting claw of the third side plate of the first water-cooling element, and the other end to a symmetrical position on the second water-cooling element. Complete the installation of the first lower iron yoke clamp in the same manner. At this point, the first upper iron yoke clamp, the first lower iron yoke clamp, the third side plate of the first water-cooling element, and the symmetrically placed side plates of the second water-cooling element form a core lamination mounting plane.

[0070] The upper yoke support plate and the first lower yoke support plate are respectively mounted on the first upper yoke clamp and the first lower yoke clamp, and the pre-processed laminations are inserted one by one from the inside to the outside on the core lamination mounting plane, and all the laminations are stacked in sequence, and the core is fastened to complete the core stacking;

[0071] Install the first side plate of the first water-cooling element between the first rectangular low-voltage coil and the first iron core column. Install the symmetrical side plate of the second water-cooling element in the same manner. Use the third transverse tension screw to tighten and secure the iron core along the width of the window. Securely connect the side plates of the water-cooling element.

[0072] Install the second side plate of the first water-cooling element between the first rectangular low-voltage coil and the first core leg, install the side plate of the second water-cooling element at a symmetrical position in the same manner, and fix the side plates of the water-cooling element together;

[0073] A plurality of longitudinal tension screws are used to longitudinally tighten and secure the first upper yoke clamp, the first lower yoke clamp, and the coil along the window height direction; the upper yoke support plate and the first lower yoke support plate are respectively installed on the second upper yoke clamp and the second lower yoke clamp; and a plurality of longitudinal tension screws are used to longitudinally tighten and secure the second upper yoke clamp, the second lower yoke clamp, and the coil along the window height direction;

[0074] The first upper iron yoke clamp and the second upper iron yoke clamp are connected and fastened by a first transverse pull screw, and the first lower iron yoke clamp and the second lower iron yoke clamp are connected and fastened by a second transverse pull screw;

[0075] Install the E-shaped rubber pad in the middle area of ​​the lower surface of the lower iron yoke, ensuring that the third transverse pull screw can be installed in the two openings of the E-shaped rubber pad;

[0076] Install the second lower iron yoke support plate;

[0077] Stand the installed core, coil and clamps upright and suspend them in the air, install the first support frame, the second support frame and the third support frame, and place the medium frequency transformer on the ground after installation;

[0078] Install the water inlet pipe and return pipe, with the height of the water inlet pipe slightly lower than that of the return pipe;

[0079] The side plates of the first water-cooling part and the second water-cooling part are connected in series or in parallel through a hose to complete the assembly of the large-capacity ultra-thin oriented silicon steel medium-frequency transformer.

[0080] Compared with the prior art, the present invention has the following beneficial effects:

[0081] The medium-frequency transformer proposed in this invention utilizes ultra-thin oriented silicon steel laminations with a thickness of ≤0.10mm, significantly reducing no-load losses. A stepped opening design reduces local hysteresis losses and improves magnetic flux density. A rectangular closed magnetic circuit with continuous bending at the four corners improves magnetic circuit efficiency and reduces volume for the same capacity. The first and second core legs are symmetrically distributed to balance magnetic flux distribution and avoid magnetic bias, making them suitable for medium-frequency applications. Compared to medium-frequency transformers with stacked core structures, the core offers superior performance, significantly improved magnetic flux density, significantly reduced volume and weight, and higher power density.

[0082] The parameter setting method for the medium-frequency transformer proposed in the present invention recursively calculates the size of each lamination in each section based on the initial length and bending angle, and adopts a group optimization algorithm to ensure the lamination accuracy and meet the processing requirements of ultra-thin silicon steel (≤0.10mm). It has higher processing accuracy and can effectively solve the problem that the accuracy of large-capacity medium-frequency transformers made of ultra-thin oriented silicon steel materials cannot meet the requirements.

[0083] The assembly method of the medium-frequency transformer proposed in the present invention ensures the assembly accuracy of the large-capacity ultra-thin oriented silicon steel medium-frequency transformer by strictly limiting the assembly steps. The core components (coil + water-cooling parts + iron yoke clamps) are first pre-installed in a horizontal position, and then the support system is installed vertically as a whole, which reduces the difficulty of positioning large components. Compared with traditional vertical assembly, the operating efficiency is greatly improved, and it is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figure 1 This is a front view of a schematic diagram of the overall structure of a large-capacity ultra-thin silicon steel medium-frequency transformer according to an embodiment of the present invention;

[0085] Figure 2 A side view of a schematic diagram of the overall structure of a large-capacity ultra-thin silicon steel medium-frequency transformer according to an embodiment of the present invention;

[0086] Figure 3 A top view of the overall structural diagram of a large-capacity ultra-thin silicon steel medium-frequency transformer according to an embodiment of the present invention;

[0087] Figure 4 Schematic diagram of the structure of a single-phase ultra-thin oriented silicon steel bent core according to an embodiment of the present invention;

[0088] Figure 5 Schematic diagram of the bending length parameters and bending and shearing positions of the nth laminate according to an embodiment of the present invention;

[0089] Figure 6 This is a schematic structural diagram of a first water-cooling component according to an embodiment of the present invention;

[0090] Figure 7 Schematic diagram of the structure of the second water-cooling component according to an embodiment of the present invention;

[0091] Figure 8 Schematic diagram of the structure of the iron yoke clamp according to an embodiment of the present invention;

[0092] Figure 9 A front view of a structural schematic diagram of a core lamination installation plane according to an embodiment of the present invention;

[0093] Figure 10 A side view of a schematic structural diagram of a core lamination installation plane according to an embodiment of the present invention;

[0094] Figure 11 A top view of a schematic structural diagram of a core lamination installation plane according to an embodiment of the present invention;

[0095] Figure 12 This is a schematic diagram of the core assembly according to an embodiment of the present invention;

[0096] Figure 13 This is a schematic diagram of the assembly of a water-cooling component according to an embodiment of the present invention;

[0097] Figure 14 This is a schematic diagram of the assembly of the iron yoke clamp according to an embodiment of the present invention;

[0098] Figure 15 This is a schematic diagram of the assembly of an E-type rubber pad according to an embodiment of the present invention;

[0099] Figure 16 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

[0100] in,

[0101] 1. Iron core; 101. Upper iron yoke 101; 102. Lower iron yoke; 103. First iron core leg; 104. Second iron core leg; 105. Corner bend;

[0102] 2. First water-cooling element; 201. First side plate; 202. Second side plate; 203. Third side plate; 204. Fourth side plate; 205. First mounting claw; 206. Second mounting claw;

[0103] 3. Second water-cooling element; 301. Fifth side plate; 302. Sixth side plate; 303. Seventh side plate; 304. Eighth side plate; 305. Third mounting claw; 306. Fourth mounting claw;

[0104] 4. First upper iron yoke clamp; 401. Web; 402. Reinforcement rib; 403. Limb plate;

[0105] 5. Second upper iron yoke clamp; 6. First lower iron yoke clamp; 7. Second lower iron yoke clamp;

[0106] 8. First transverse pull screw; 9. Second transverse pull screw; 10. First rectangular low-voltage coil; 11. First rectangular high-voltage coil; 12. Second rectangular low-voltage coil; 13. Second rectangular high-voltage coil;

[0107] 14. Coil spacer; 15. Longitudinal pull screw; 16. Upper iron yoke support plate; 17. First lower iron yoke support plate; 18. Second lower iron yoke support plate; 19. E-type rubber spacer;

[0108] 20. First support frame; 21. Second support frame; 22. Third support frame; 23. Water inlet pipe; 24. Water return pipe; 25. Connecting hose; 26. Third horizontal pull screw;

[0109] 27. Epoxy stays; 28. Temporary pads; 29. ​​Tie steel strips; 30. Screws; 31. Horizontal assembly table. DETAILED DESCRIPTION

[0110] The present invention will be further described below with reference to the accompanying drawings and examples. The following examples are provided for a better understanding of the present invention and are not intended to limit the present invention to the best mode of implementation. They do not limit the content and scope of protection of the present invention. Any product identical or similar to the present invention that is derived by anyone under the guidance of the present invention or by combining the features of the present invention with other prior arts shall fall within the scope of protection of the present invention.

[0111] Example 1

[0112] This embodiment provides a ±10kV, 200kVA, 600Hz medium frequency transformer made of ultra-thin oriented silicon steel strip with a thickness E of 0.10mm and a width of 120mm. The core window height H is 360mm, the window width W is 228mm, and the lamination thickness D is 47mm. The high and low voltage windings are both made of 0.10mm thick copper foil and are made by epoxy casting according to the traditional dry-type transformer coil manufacturing method. Figures 1 to 3 The transformer includes:

[0113] The core cross section is rectangular, the core leg has a stepped opening, and the single-phase ultra-thin oriented silicon steel bent core 1 has a bending angle AN of 135°.

[0114] The single-phase ultra-thin oriented silicon steel bent core 1 is an open core with a bent corner. Figure 4 As shown, it is constructed from ultra-thin, oriented silicon steel, assembled and stacked from the inside out. It includes an upper iron yoke 101, a lower iron yoke 102, a first iron core leg 103, a second iron core leg 104, and a corner bend 105. The first iron core leg 103 and the second iron core leg 104 are symmetrically distributed in a multi-step structure, with a one-piece, one-stack stepping method and a stepping spacing of 20 mm.

[0115] A first water-cooling element 2 and a second water-cooling element 3 with clamping and positioning functions are located on the two core legs of the single-phase ultra-thin oriented silicon steel bent core 1, and the water-cooling elements are arranged around the core legs;

[0116] a first upper yoke clamp 4 and a second upper yoke clamp 5 respectively located on both sides of the upper yoke of the core 1, the first upper yoke clamp 4 and the second upper yoke clamp 5 interacting to clamp the upper yoke 101; a first lower yoke clamp 6 and a second lower yoke clamp 7 respectively located on both sides of the lower yoke of the core 1, the first lower yoke clamp 6 and the second lower yoke clamp 7 interacting to clamp the lower yoke 102;

[0117] The first upper yoke clamp 4 and the first lower yoke clamp 6 are located on the same side of the core 1, and the second upper yoke clamp 5 and the second lower yoke clamp 7 are located on the same side of the core 1. The first upper yoke clamp 4 and the second upper yoke clamp 5 are connected and fastened by first transverse tension screws 8 located at both ends thereof, and the first lower yoke clamp 6 and the second lower yoke clamp 7 are connected and fastened by second transverse tension screws 9 located at both ends thereof. The axial directions of the first transverse tension screws 8 and the second transverse tension screws 9 are parallel to the thickness direction of the core 1.

[0118] A first rectangular low-voltage coil 10, a first rectangular high-voltage coil 11, a second rectangular low-voltage coil 12, and a second rectangular high-voltage coil 13 are respectively installed on two core legs of a single-phase ultra-thin oriented silicon steel core 1;

[0119] A coil spacer 14 located between the coil and the iron yoke limb for pressing the coil;

[0120] The longitudinal pulling screw 15 is used to tighten the upper and lower iron yokes, coil pads and high and low voltage coils; the first upper iron yoke clamp 4 and the second upper iron yoke clamp 5 are connected to the first lower iron yoke clamp 6 and the second lower iron yoke clamp 7 through multiple longitudinal pulling screws 15 located at both ends of the upper iron yoke clamps, and the axial direction of the longitudinal second upper iron yoke clamp 5 is parallel to the height direction of the iron core 1.

[0121] An upper yoke support plate 16 located at the bottom of the first upper yoke clamp 4 and the second upper yoke clamp 5 for supporting the upper yoke;

[0122] A first lower yoke support plate 17 located on the top of the first lower yoke clamp 6 and the second lower yoke clamp 7 for supporting the lower yoke, and a second lower yoke support plate 18 located on the bottom of the first lower yoke clamp 6 and the second lower yoke clamp 7;

[0123] The space between the second lower iron yoke support plate 18 and the lower iron yoke 102 is filled with an E-shaped rubber pad 19;

[0124] A first support frame 20 and a second support frame 21 located at both ends of the bottom of the lower iron yoke clamp and a third support frame 22 located below the second support plate 18;

[0125] The water inlet pipe 23 and the water return pipe 24 are located on the first support frame 20 and the second support frame 21 and on both sides of the iron core 1, and the connecting hose 25 is used to connect the water inlet pipe 23, the water return pipe 24 and the first water-cooling component 2 and the second water-cooling component 3.

[0126] The two core columns are provided with a first water-cooling member 2 with a clamping and positioning function, as shown in the attached Figure 6 As shown. The first water-cooling element 2 includes a first side plate 201 located on the outer side of the first core leg 103, a second side plate 202 on the front and rear ends, a third side plate 203, and a fourth side plate 204 on the inner side of the core, close to the first core leg. The thickness of the first side plate 201, the second side plate 202, the third side plate 203, and the fourth side plate 204 is 10 mm. The first side plate 201, the second side plate 202, the third side plate 203, and the fourth side plate 204 are fixedly connected and connected to the water inlet pipe 23 and the water return pipe 24 via water pipes. Specifically, a water-cooling element has two water inlet pipes and two water outlet pipes. One of the water inlet pipes branches and connects to the two side plates. The two water inlets and two water outlets are respectively connected to the main water inlet pipe 23 and the water return pipe 24.

[0127] The first water-cooling component 2 is provided with a water inlet and outlet, which are located at the bottom of the water-cooling plate near the lower iron yoke 102, and the inner diameter of the water inlet and outlet is 5 mm.

[0128] The first side plate 201 on the side of the core is 484mm long, higher than the overall height of the core 455mm, and has a width of 120mm, which is the same as the width of the ultra-thin oriented silicon steel used in the core. The length of the fourth side plate 204 is a fixed value of 326mm between the core window height of 360mm and the coil height of 280mm, and the width is 120mm, which is the same as the width of the ultra-thin oriented silicon steel. The second side plate 202, the third side plate 203 and the fourth side plate 204 have the same length of 326mm, and the width is equal to the sum of the thickness of the core laminations and the thickness of the first side plate 201 and the thickness of the fourth side plate 204, which is 67mm. The second side plate 202 and the third side plate 203 are provided with a first mounting claw 205 and a second mounting claw 206 at one end along the length direction, and the water-cooled plate 2 can be fixed to the first upper iron yoke clamp 4 and the second upper iron yoke clamp 5 by screws 30.

[0129] The first side plate 201, the second side plate 202, the third side plate 203, and the fourth side plate 204 are closely attached to the surface of the first core leg 103, enclosing the core leg 103. The side plates are connected by screws 30, which are located at both ends of the second side plate 202 and the third side plate 203 along the length direction, in positions not blocked by the coil.

[0130] The second core column 104 is provided with a second water-cooling member 3 with clamping and positioning functions, as shown in the attached Figure 7 The second water-cooling element 3 has the same structure as the first water-cooling element 2 and is symmetrically arranged. It includes a fifth side plate 301 located on the outer side of the second core leg 104, a sixth side plate 302 and a seventh side plate 303 located on the front and rear ends, and an eighth side plate 304 located on the inner side of the core. The fifth side plate 301, the sixth side plate 302, the seventh side plate 303, and the eighth side plate 304 are 10 mm thick.

[0131] The second water-cooling component 3 is provided with a water inlet and outlet, which are located at the bottom of the water-cooling plate near the lower iron yoke 102, and the inner diameter of the water inlet and outlet are both 5 mm.

[0132] The fifth side plate 301 on the core side is 484mm long, taller than the core's overall height of 455mm. Its width is 120mm, the same width as the ultra-thin grain-oriented silicon steel used in the core. The eighth side plate 304 has a fixed length of 326mm, between the core window height of 360mm and the coil height of 280mm, and a width of 120mm, the same width as the ultra-thin grain-oriented silicon steel used in the core. The sixth, seventh, and eighth side plates 302, 303, and 304 have the same length of 326mm and a width equal to the sum of the core lamination thickness, the thickness of the fifth side plate 301, and the thickness of the eighth side plate 304, which is 67mm. The sixth and seventh side plates 302, 303 have third and fourth mounting claws 305, 306 along one end of their lengths, which can be used to secure the second water-cooling element 3 to the first and second upper yoke clamps 4, 5, via screws 30.

[0133] The first side plate 201 on the outer side of the first core column 103 and the fifth side plate 301 on the outer side of the second core column 104 are tightened and fixed along the width direction of the window by two tension screws with a diameter of 8 mm located at the top of the upper iron yoke and the bottom of the lower iron yoke, as shown in the attached figure. Figure 1 shown.

[0134] The structures of the first upper iron yoke clamp 4, the second upper iron yoke clamp 5, the first lower iron yoke clamp 6, and the second lower iron yoke clamp 7 are consistent. Figure 8 As shown. It consists of a core web 401 made of non-magnetic steel, a reinforcement rib 402, and an I-shaped limb 403. The I-shaped limb 403 is distributed along the length of the core web 401 at the top of the coil pad 14 and the longitudinal tension screw 15 to compress the coil, as shown in the attached figure. Figure 1 shown.

[0135] Example 1

[0136] This embodiment provides a method for adjusting the parameters of a medium frequency transformer, comprising the following steps:

[0137] 1) According to the structure of the single-phase ultra-thin oriented silicon steel bent core (1) with a rectangular core section and a stepped opening on the core column, the bending size of each core lamination is determined as follows: in represents the length of the nth laminated ultra-thin silicon steel strip located on the upper portion of the first core column 103, represents the length of the nth laminated ultra-thin silicon steel strip located at the upper corner 105 of the first core column 103, Indicates the length of the nth lamination ultra-thin silicon steel strip located on the upper iron yoke 101, It represents the length of the nth laminated ultra-thin silicon steel strip located at the right corner 105 of the upper iron yoke 101, represents the length of the nth laminated ultra-thin silicon steel strip located on the upper portion of the second core column 104, represents the length of the nth laminated ultra-thin silicon steel strip at the bottom of the second core column 104, represents the length of the nth laminated ultra-thin silicon steel strip located at the lower corner 105 of the second core column 104, Indicates the length of the nth lamination ultra-thin silicon steel strip located at the lower iron yoke 102, It represents the length of the nth laminated ultra-thin silicon steel strip located at the left corner 105 of the lower iron yoke 101, represents the length of the nth laminated ultra-thin silicon steel strip located at the bottom of the first core column 103; The length of ultra-thin silicon steel strip that has been slit is fed into the bending equipment for bending and shearing operations; Figure 5 shown.

[0138] 2) Calculate the number of core laminations DT = 470 according to formula (1);

[0139]

[0140] Where D is the thickness of the core lamination, and E is the thickness of the ultra-thin silicon steel sheet;

[0141] 3) According to formulas (2) and (3), calculate the bending size of each piece of ultra-thin silicon steel in the first group of laminations in order from the inside to the outside:

[0142]

[0143] in,

[0144]

[0145] In the formula, y is the set Initial length, d is the set The initial length of the core window, W is the width of the core window, and H is the height of the core window.

[0146] After completing the bending size calculation for each piece, make the following judgments:

[0147] like Then continue to calculate the bending size of the next sheet in the first set of laminates according to formulas (2) and (3);

[0148] like The calculation of the size of the first set of laminations is completed. At this time, the number of laminations in each set, m, is equal to the number of core steps, n.

[0149] In this embodiment, The initial length is set to 20mm, The initial length is set to 5mm, the core window height H is 360mm, and the window width W is 228mm. After calculating the number of laminations per group and the core step level m = 17;

[0150] 4) Calculate the parameter r according to formula (4):

[0151]

[0152] In this embodiment, the parameter r=11;

[0153] 5) If r>0, the number of lamination groups i is calculated according to formula (5):

[0154]

[0155] At this time, the number of laminations in each of the 2nd to i-1th groups is m, and the number of laminations in the i-th group is r;

[0156] The bending dimensions of the 2nd to i-1th group of laminations are calculated according to formula (6):

[0157]

[0158] The bending dimensions of the i-th group of laminations are calculated according to formula (7):

[0159]

[0160] If r = 0, the number of lamination groups i is calculated according to formula (8):

[0161]

[0162] At this time, the number of laminations in the second to i-th groups is m;

[0163] The bending dimensions of the second to i-th stacks are calculated according to formula (9):

[0164]

[0165] In this embodiment, r>0, the number of lamination groups i=28 is calculated according to formula (5); the bending dimensions of the 2nd to 27th lamination groups are calculated according to formula (6), and the bending dimensions of the 27th lamination group are calculated according to formula (7). The bending dimensions of each lamination in the 1st to 28th lamination groups are calculated as shown in Table 1.

[0166] Table 1 Calculation results of bending dimensions of each lamination in the 1st to 28th groups of laminations

[0167]

[0168]

[0169]

[0170] Example 3

[0171] This embodiment provides a method for assembling a large-capacity ultra-thin silicon steel medium-frequency transformer. The specific steps are as follows:

[0172] 1) Make clear the bending size of each core lamination During processing, follow the Feed in sequence, and bend once at a bending angle of 135° every time a bending size is reached. Bend 4 times in succession and then cut for the fifth time. Repeat the 4-fold and 1-cut operation until all the laminates are bent and cut. Figure 5 is the bending length parameter and bending and shearing position of the nth laminate;

[0173] 2) Place the first rectangular low-voltage coil 10 in a vertical position, and insert the first rectangular high-voltage coil 11 onto the outside of the first rectangular low-voltage coil 10. Use multiple sets of epoxy stays 27 that are evenly or symmetrically distributed to hold the first rectangular low-voltage coil 10 and the first rectangular high-voltage coil 11 together, completing the assembly of the first rectangular low-voltage coil 10 and the first rectangular high-voltage coil 11.

[0174] 3) Place the second rectangular low-voltage coil 12 in a vertical position, and fit the second rectangular high-voltage coil 13 onto the outside of the second rectangular low-voltage coil 12. Use multiple sets of epoxy stays 27 that are evenly or symmetrically distributed to hold the second rectangular low-voltage coil 12 and the second rectangular high-voltage coil 13 together, completing the assembly of the second rectangular low-voltage coil 12 and the second rectangular high-voltage coil 13.

[0175] 4) Place the first rectangular low-voltage coil 10 and the first rectangular high-voltage coil 11, as well as the second rectangular low-voltage coil 12 and the second rectangular high-voltage coil 13, horizontally on the rectangular horizontal assembly table 31. The placement positions are bilaterally symmetrical, so that the distance between the first rectangular high-voltage coil 11 and the second rectangular high-voltage coil 12 is the insulation distance between the two coils, as shown in the attached figure. Figures 9-11 As shown;

[0176] 5) After evenly applying thermally conductive silicone to the surface of the third side plate 203 of the first water-cooling element 2, place it horizontally against the bottom of the inner side of the first rectangular low-voltage coil 10, ensuring that the length of the side with the second mounting claw 206 extending from the first rectangular low-voltage coil 10 is equal to the height of the coil spacer 14, which is 40 mm.

[0177] 6) After evenly applying thermal conductive silicone to the surface of the fourth side plate 204 of the first water-cooling element 2, place it upright against the right side of the inside of the first rectangular low-voltage coil 10. The fourth side plate 204 is connected to the third side plate 203 by screws 30. The lengths of the fourth side plate 204 extending from the first rectangular low-voltage coil 10 are 33 mm and 13 mm respectively. The end with a length of 33 mm is the end close to the second mounting claw 206. Figures 9-11 As shown;

[0178] 7) After evenly applying thermal conductive silicone to the surface of the sixth side plate 302 of the second water-cooling unit 3, place it horizontally against the bottom of the inner side of the second rectangular low-voltage coil 12, ensuring that the length of the side with the third mounting claw 305 extending from the first rectangular low-voltage coil 12 is equal to the height of the coil pad 14, which is 40 mm. Figures 9-11 As shown;

[0179] 8) After evenly applying thermally conductive silicone to the surface of the eighth side plate 304 of the second water-cooling element 3, place it upright against the left side of the inner side of the second rectangular low-voltage coil 12. The sixth side plate 302 is connected to the eighth side plate 304 by screws 30. The lengths of the ends of the sixth side plate 302 extending from the second rectangular low-voltage coil 12 are 33 mm and 13 mm respectively. The end with a length of 33 mm is the end closest to the third mounting claw 305, as shown in the attached figure. Figures 9-11 As shown;

[0180] 9) Install the first upper yoke clamp 4 with the plane for clamping the yoke upwards to the third side plate 203 with the second mounting claw 206 and the seventh side plate 303 with the fourth mounting claw 306, and use multiple temporary pads 28 to support the side of the first upper yoke clamp 4 with the web, as shown in the attached Figures 9-11 As shown;

[0181] 10) Place the same number of temporary pads 28 as the temporary pads 28 at the other end of the coil at a symmetrical position, and at the same time place the first lower yoke clamp 6 with the plane for clamping the lower yoke facing upwards, with the side with the web placed on the temporary pad 28. At this time, the first upper yoke clamp 4, the first lower yoke clamp 6, the third side plate 203 with the second mounting claw 206 and the sixth side plate 302 of the second water-cooling unit 3 form the core lamination installation plane, as shown in the attached figure. Figure 12 As shown;

[0182] 11) Install the upper iron yoke support plate 16 and the first support plate 17 of the lower iron yoke made of 6mm thick epoxy plate to the first upper iron yoke clamp 4 and the first lower iron yoke clamp 6 through the reserved mounting holes, and insert the pre-processed iron core bending sheets one by one from the inside to the outside on the iron core lamination installation plane, and ensure that the innermost lamination is close to the fourth water-cooling plate 204 of the first water-cooling unit 2, the fifth side plate 301 of the second water-cooling unit 3, the upper iron yoke support plate 16 and the first support plate 17 of the lower iron yoke, and the next iron core lamination is close to the previous iron core lamination. Complete the stacking of all the iron core bending sheets in sequence, and use two tying steel strips 29 with a width of 25mm and a thickness of 3mm to tighten the iron core to complete the iron core stacking, as shown in the attached figure. Figure 13 As shown;

[0183] 12) Apply thermal conductive silicone to the surfaces of the first side plate 201 of the first water-cooling unit 2 and the fifth side plate 301 of the second water-cooling unit 3, respectively, and install them between the first rectangular low-voltage coil 10 and the first iron core column 103, and between the second rectangular low-voltage coil 12 and the first iron core column 104. Use four tension screws with a diameter of 10 mm to tighten and fix the iron core 1 along the width direction of the window. Then, use bolts to connect the first side plate 201 of the first water-cooling unit 2 to the third side plate 203, and the fifth side plate 301 of the second water-cooling unit 3 to the sixth side plate 302, as shown in the attached figure. Figure 13 As shown;

[0184] 13) Apply thermal conductive silicone to the surfaces of the second side plate 202 of the first water-cooling unit 2 and the seventh side plate 303 of the second water-cooling unit 3, respectively, and install them between the first rectangular low-voltage coil 10 and the upper end surface of the first iron core column 103 and the second rectangular low-voltage coil 12 and the upper end surface of the first iron core column 104. Connect the second water-cooling unit S06 of the water-cooling plate 2 to the first side plate 201 and the fourth side plate 204 of the first water-cooling unit 2, and the seventh side plate 303 of the second water-cooling unit 3 to the fifth side plate 301 and the fourth side plate 304 by bolts to complete the installation of the first water-cooling unit 2 and the second water-cooling unit 3, as shown in the attached figure. Figure 14 As shown;

[0185] 14) Place the four coil pads 14 under the four I-shaped limbs 403 of the first upper iron yoke clamp 4 and the first lower iron yoke clamp 6 corresponding to the coil ends, ensuring that the position of the first lower iron yoke clamp 6 remains unchanged, and use three longitudinal tension screws 15 with a diameter of 8 mm on the left, middle and right to longitudinally tighten the first upper iron yoke clamp 4 and the first lower iron yoke clamp 6, the coil pads 14 and the coil, as shown in the attached figure. Figure 14 As shown;

[0186] 15) Place the second upper yoke clamp 5 and the second lower yoke clamp 7 on the upper yoke 101 and the lower yoke 102 with the plane for clamping the yoke facing downwards, and place them symmetrically with the first upper yoke clamp 4 and the first lower yoke clamp 6. At the same time, install the upper yoke support plate 16 and the first support plate 17 of the lower yoke on the second upper yoke clamp 5 and the second lower yoke clamp 7 through the reserved mounting holes, as shown in the attached figure. Figure 14 As shown;

[0187] 16) Place the four coil pads 14 under the four I-shaped limbs 403 of the second upper iron yoke clamp 5 and the second lower iron yoke clamp 7 corresponding to the coil ends, ensuring that the position of the second lower iron yoke clamp 7 remains unchanged, and use three longitudinal tension screws 15 with a diameter of 8 mm on the left, middle and right to longitudinally tighten the second upper iron yoke clamp 5 and the second lower iron yoke clamp 7, the coil pads 14 and the coil, as shown in the attached figure. Figure 14 As shown;

[0188] 17) Connect and tighten the first upper yoke clamp 4 and the second upper yoke clamp 5 through the first transverse pull screw 8 located at both ends of the upper yoke clamp, and the first lower yoke clamp 6 and the second lower yoke clamp 7 through the second transverse pull screw 9 located at both ends of the upper yoke clamp, as shown in the attached figure. Figure 15 As shown;

[0189] 18) Align the opening direction of the E-type rubber pad 19 with an opening width of 12mm, an opening depth of 12mm and a bottom thickness of 5mm with the bottom of the lower iron yoke 102, and buckle it to the middle area of ​​the lower surface of the lower iron yoke 102 to ensure that the pull screw (26) can be installed in the two openings of the E-type rubber pad 19, as shown in the attached Figure 15 As shown;

[0190] 19) Install the second bottom support plate 18 into the reserved mounting holes on the first lower iron yoke clamp 6 and the second lower iron yoke clamp 7 by bolts, so that the E-shaped rubber pad 19 is fixed to the bottom of the lower iron yoke 102 of the core 1, as shown in the attached Figure 1 As shown;

[0191] 20) Remove all temporary pads 28, stand the installed core, coil and clamps upright and suspend them in the air, and then install the first support frame 20, the second support frame 21 and the third support frame 22 to the reserved mounting holes on the first lower iron yoke clamp 6 and the second lower iron yoke clamp 7 by bolts. Figure 1 As shown;

[0192] 21) Place the intermediate frequency transformer on the ground through the first support frame 20, the second support frame 21 and the third support frame 22, as shown in the attached Figure 1 As shown;

[0193] 22) Ensure that the water inlet directions of the water inlet pipe 23 and the water return pipe 24 on both sides of the core 1 are on the same side, and install the water inlet pipe 23 and the water return pipe 24 to the first support frame 20 and the second support frame 21 respectively through bolts. The height of the water inlet pipe 23 is slightly lower than the height of the water return pipe 24. Figure 1 As shown;

[0194] 23) Connect the side plates of the first water-cooling unit 2 and the second water-cooling unit 3 in series or in parallel through a hose. Install the water inlets of the first water-cooling unit 2 and the first water-cooling unit 3 to the water inlet pipe 23 nearby, and install the water outlets of the first water-cooling unit 2 and the second water-cooling unit 3 to the water return pipe 24 nearby to complete the assembly of the ultra-thin silicon steel medium-frequency transformer. Figure 1 shown.

[0195] Example 4

[0196] like Figure 16 As shown, the present invention also provides an electronic device, which may be a computer, a single-chip microcomputer, a smart mobile device, or the like. The electronic device in this embodiment may include a processor, a memory, a transceiver component, and the like. The memory, processor, and transceiver component are connected via a bus; the memory may be used to store an execution program, which may include instructions; and the processor may be used to execute the instructions stored in the memory. The memory may also be used to store data, which may be accessed and / or modified during the execution of the instructions.

[0197] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of a parameter adjustment method of a medium frequency transformer in the above embodiment.

[0198] Example 5

[0199] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It can be understood that the storage medium here can include both built-in storage media in the electronic device and, of course, extended storage media supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space. These instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of the parameter adjustment method of a medium frequency transformer in the above embodiment.

[0200] Comparative Example 1

[0201] A ±10kV, 200kVA, 600Hz medium frequency transformer made of ordinary thickness oriented silicon steel with a thickness E of 0.20mm. The core is a traditional single-frame double-column stacked core structure with a window height of 393mm and a window width of 247mm. The high and low voltage windings are the same as those in the embodiment, both using copper foil with a thickness of 0.10mm, and are made by epoxy casting according to the traditional dry-type transformer coil manufacturing method. The core lamination process is a traditional core lamination process, and the lamination sheet shape is a sheet shape formed by longitudinal shearing and 45° transverse shearing. The stepping method is a traditional 3-level stepping, 1 sheet 1 stacking structure. The coil assembly method is to remove the upper iron yoke of the stacked core, put the coil on the core column, and then re-insert the removed upper iron yoke. The water channel structure setting of Comparative Example 1 is exactly the same as that of the embodiment. The core columns are all wrapped by water-cooling plates with a thickness of 10mm.

[0202] Comparative Example 2

[0203] This large-capacity, ultra-thin silicon steel medium-frequency transformer, with a ±10kV, 200kVA, and 600Hz rating, is manufactured using ultra-thin grain-oriented silicon steel strip with a thickness of 0.10mm and a width of 120mm. The core is a traditional single-frame, double-leg laminated core structure, with a core window height (H) of 368mm, a window width (W) of 233mm, and a lamination thickness (D) of 50mm. Both high and low voltage windings utilize 0.10mm thick copper foil, cast using epoxy casting according to traditional dry-type transformer coil manufacturing methods. The core lamination process is conventional, with the laminations formed by longitudinal shearing and 45° transverse shearing. The lamination stepping method is a traditional three-step, one-piece-per-stack structure. The coil is assembled by removing the upper yoke from the stacked core, fitting the coil onto the core legs, and then reinstalling the removed upper yoke. The water channel structure of Comparative Example 2 is exactly the same as that of the embodiment, and the core columns are all wrapped by water-cooling plates with a thickness of 10 mm.

[0204] Comparative Example 3

[0205] A ±10kV, 200kVA, 600Hz medium frequency transformer made of ordinary thickness oriented silicon steel with a thickness E of 0.20mm. The core is a traditional single-frame double-column laminated core structure with a window height of 393mm and a window width of 247mm. The high and low voltage windings are the same as those in the embodiment, both using copper foil with a thickness of 0.10mm, and are made by epoxy casting according to the traditional dry-type transformer coil manufacturing method. The core lamination process is a traditional lamination process, and the lamination sheet shape is a sheet shape formed by longitudinal shearing and 45° transverse shearing. The stepping method is a traditional 3-level stepping, 1 sheet 1 stacking structure. The coil assembly method is to remove the upper iron yoke of the stacked core, put the coil on the core column, and then re-insert the removed upper iron yoke. The comparative waterway structure is a traditional waterway structure, with a spiral water pipe placed in the middle of the low-voltage coil. The water pipe is a plastic hose with an inner diameter of 5mm.

[0206] The performance of the medium frequency transformers obtained in Example 1, Comparative Example 2, and Comparative Example 3 was tested, and the test results are shown in Table 2.

[0207] Table 2 Test results of ±10kV, 200kVA, 600Hz medium frequency transformer

[0208]

[0209] According to the data in Table 2, compared with Comparative Example 1, the no-load loss, load loss, and rated efficiency of the embodiment are basically the same. The core design magnetic flux density is increased by about 32.9%, the volume is reduced by about 10%, and the power density is increased by about 24.4%. Compared with Comparative Example 2, the no-load loss, load loss, and rated efficiency of the embodiment are basically the same. The design magnetic flux density is increased by about 17%, the volume is reduced by about 6.2%, and the power density is increased by about 10.9%. This solves the problems of low cross-cutting and lamination accuracy in the processing of ultra-thin oriented silicon steel medium-frequency transformer cores with laminated core structures, and the difficulty of inserting laminations using traditional material assembly methods. It significantly reduces the volume of the medium-frequency transformer and improves the power density. Compared with Comparative Example 3, the no-load loss, load loss, and rated efficiency of the embodiment are basically the same. The core design magnetic flux density is increased by about 32.9%, the volume is reduced by about 10%, and the power density is increased by about 21.7%. The water-cooling structure of this embodiment replaces the conventional water-cooling structure with a plastic hose between the low-voltage windings in Comparative Example 3. This structure cools both the core and the low-voltage windings simultaneously, resolving the problem of the conventional water-cooling structure cooling only the low-voltage windings and providing poor cooling efficiency. It also addresses the issue of core heating. Compared to Comparative Example 3, the core temperature rise in this embodiment is reduced by approximately 2.5 times, and the winding temperature rise is reduced by approximately 20%.

[0210] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A medium frequency transformer, characterized in that: include: An iron core (1) with a rectangular cross section and a stepped opening is provided. The iron core (1) is a multi-stage stepped structure and is formed by assembling and stacking ultra-thin oriented silicon steel laminations with a thickness of ≤0.10 mm. The iron core (1) comprises an upper iron yoke (101), a lower iron yoke (102), a first iron core column (103), a second iron core column (104), and corner bends (105) provided at the four corners of the rectangle. Iron yoke clamps located on both sides of the upper iron yoke (101) and the lower iron yoke (102); A high-voltage coil and a low-voltage coil are concentrically wound around the first iron core leg (103) and the second iron core leg (104).

2. The medium frequency transformer according to claim 1, characterized in that: Also includes: A water-cooling component, the water-cooling component comprising a first water-cooling component (2) and a second water-cooling component (3), the first water-cooling component (2) and the second water-cooling component (3) respectively surrounding and clamping the first iron core column (103) and the second iron core column (104); A water inlet pipe (23) and a water return pipe (24) are connected on both sides of the iron core (1) and used to supply water to the water cooling element, and a connecting hose (25) connecting the water inlet pipe (24) and the water return pipe (24).

3. The medium frequency transformer according to claim 1, characterized in that: The first iron core leg (103) and the second iron core leg (104) are multi-stage stepping structures with symmetrical spatial distribution.

4. The medium frequency transformer according to claim 1, characterized in that: The iron yoke clamp comprises a first upper iron yoke clamp (4), a second upper iron yoke clamp (5), a first lower iron yoke clamp (6) and a second lower iron yoke clamp (7); the first upper iron yoke clamp (4) and the second upper iron yoke clamp (5) interact with each other to clamp the upper iron yoke (101); the first lower iron yoke clamp (6) and the second lower iron yoke clamp (7) interact with each other to clamp the lower iron yoke (102).

5. The medium frequency transformer according to claim 4, characterized in that: The first upper iron yoke clamp (4) is connected to the second upper iron yoke clamp (5) via first transverse pull screws (8) located at both ends of the upper iron yoke clamp, and the axial direction of the first transverse pull screws (8) is parallel to the thickness direction of the iron core (1); the first lower iron yoke clamp (6) is connected to the second lower iron yoke clamp (7) via second transverse pull screws (9) located at both ends of the lower iron yoke clamp, and the axial direction of the second transverse pull screws (9) is parallel to the thickness direction of the iron core (1).

6. The medium frequency transformer according to claim 1, characterized in that: The high-voltage coil comprises a first rectangular high-voltage coil (11) and a second rectangular high-voltage coil (13); the low-voltage coil comprises a first rectangular low-voltage coil (10) and a second rectangular low-voltage coil (12); the first rectangular high-voltage coil (11) and the first rectangular low-voltage coil (10) are sleeved on the first iron core column (103); the second rectangular high-voltage coil (13) and the second rectangular low-voltage coil (12) are sleeved on the second iron core column (104).

7. The medium frequency transformer according to claim 2, characterized in that: The first water-cooling component (2) comprises a first side plate (201) located outside the iron core (1) and closely attached to the first iron core column (103), a second side plate (202) connected to the first side plate (201) and closely attached to the first iron core column (103), a third side plate (203), and a fourth side plate (204) located inside the iron core (1) and closely attached to the first iron core column (103) relative to the first side plate (201); The first side plate (201), the second side plate (202), the third side plate (203), and the fourth side plate (204) are fixedly connected and connected to the water inlet pipe (23) and the water return pipe (24) through water pipes; The second water-cooling component (3) has the same structure as the first water-cooling component (2) and is symmetrically arranged around the second iron core column (104).

8. The medium frequency transformer according to claim 7, characterized in that: The second side plate (202) and the third side plate (203) are both provided with a first mounting claw (205) and a second mounting claw (206); the first water-cooling component (2) is connected to the first upper iron yoke clamp (4) and the second upper iron yoke clamp (5) via the first mounting claw (205) and the second mounting claw (206).

9. The medium frequency transformer according to claim 4, characterized in that: The first upper iron yoke clamp (4) and the second upper iron yoke clamp (5) are connected to the first lower iron yoke clamp (6) and the second lower iron yoke clamp (7) via a plurality of longitudinal pull screws (15) located at both ends of the upper iron yoke clamps, and the axial direction of the longitudinal second upper iron yoke clamp (5) is parallel to the height direction of the iron core (1); The first water-cooling component (2) is connected to the second water-cooling component (3) via third transverse pull screws (26) located at both ends of the water-cooling component, and the axial direction of the third transverse pull screws (26) is parallel to the width direction of the iron core (1).

10. The medium frequency transformer according to claim 4, characterized in that: An upper iron yoke support plate (16) is provided between the first upper iron yoke clamp (4), the second upper iron yoke clamp (5) and the upper iron yoke (101); A first lower iron yoke support plate (17) is provided between the first lower iron yoke clamp (6), the second lower iron yoke clamp (7) and the lower iron yoke (102); a second lower iron yoke support plate (18) is provided at the bottom of the first lower iron yoke clamp (6) and the second lower iron yoke clamp (7); A first support frame (20) and a second support frame (21) are provided at both ends of the bottom of the lower iron yoke clamp, and a third support frame (22) is provided at the bottom of the second lower iron yoke support plate (18).

11. The medium frequency transformer according to claim 10, characterized in that: The space between the second lower iron yoke support plate (18) and the lower iron yoke (102) is filled with an E-shaped rubber pad (19).

12. The medium frequency transformer according to claim 1, characterized in that: The iron yoke clamp comprises a web (401) closely attached to the iron yoke, a reinforcing rib (402), and a plurality of limbs (403) with I-shaped cross sections distributed along the length direction of the web (401). The limbs (403) are distributed at the location of the longitudinal pull screw (15) and are used to compress the coil.

13. A method for adjusting parameters of a medium frequency transformer according to any one of claims 1 to 12, characterized in that: The following steps are involved: Determine core parameter data, wherein the core parameter data includes: core window width W, core window height H, core thickness D and thickness E of ultra-thin oriented silicon steel laminations; Determine the number of ultra-thin oriented silicon steel laminations DT based on the thickness D of the core laminations and the thickness E of the ultra-thin oriented silicon steel laminations; The number of lamination groups i, the number of laminations in each group m, and the corresponding dimensions of each lamination at the upper iron yoke (101), the lower iron yoke (102), the first iron core column (103), the second iron core column (104), and the corner bend (105) are determined based on the core window width W and the core window height H.

14. The setting method according to claim 13, characterized in that: The dimensions of each lamination include: The length of the ultra-thin oriented silicon steel lamination located in the upper middle portion of the first core column 103 is The length of the ultra-thin oriented silicon steel lamination located at the upper corner 105 of the first core column 103 is The length of the ultra-thin oriented silicon steel laminations in the upper iron yoke 101 The length of the ultra-thin oriented silicon steel lamination at the right corner 105 of the upper iron yoke 101 is The length of the ultra-thin oriented silicon steel lamination located in the upper middle portion of the second core column 104 is The length of the ultra-thin oriented silicon steel laminations located in the lower middle portion of the second core column 104 is The length of the ultra-thin oriented silicon steel lamination at the lower corner 105 of the second core column 104 is The length of the ultra-thin oriented silicon steel laminations in the lower iron yoke 102 The length of the ultra-thin oriented silicon steel lamination at the left corner 105 of the lower iron yoke 101 is The length of the ultra-thin oriented silicon steel laminations located in the lower middle portion of the first core column 103 is Where n represents the nth stack counting from the inside out.

15. The setting method according to claim 13, characterized in that: The number of laminations DT is determined by the following calculation formula: in, Indicates rounding up to the smallest integer greater than or equal to a.

16. The setting method according to claim 14, characterized in that: The calculation method of the number of lamination groups i, the number of laminations in each group m and the size of each lamination is as follows: Based on the core window width W and core window height H, set The initial length is y The initial length of the core is d, and the bending angle of the core is AN. Calculate the size of the first lamination: Based on the size of the first laminate, set the step spacing to x and calculate the size of the nth laminate; After completing the bending size calculation for each piece, make the following judgments: like Then continue to calculate the bending size of the next piece; like The calculation of the size of the first set of laminations is then completed, and the number m of laminations in each set is determined; Calculate the number of lamination groups i based on the number of laminations DT and the number of laminations in each group m; If the number of stacks DT is divisible by the number of stacks in each group m, then the number of stacks in each group is m; If the number of laminations DT is not divisible by the number of laminations in each group m, then the number of laminations in the 2nd to i-1th groups is m, and the number of laminations in the i-th group is r; Based on the first set of lamination dimensions and the stepping pitch x, the lamination dimensions of each set are calculated.

17. The setting method according to claim 16, characterized in that: The dimensions of the first set of laminations are calculated according to the following formula: in, 18. The setting method according to claim 16, characterized in that: The lamination size of group i is calculated according to the following formula: Among them, j = 2, 3…i; k = 1, 2, 3…, m.

19. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the parameter setting method for the medium frequency transformer according to any one of claims 13 to 18 is implemented.

20. A readable storage medium, characterized in that An execution program is stored thereon, and when the execution program is executed, the parameter setting method of the medium frequency transformer as described in any one of claims 13 to 18 is implemented.

21. A method for assembling a medium frequency transformer according to any one of claims 1 to 12, characterized in that: The following steps are involved: Put the high-voltage coil on the low-voltage coil respectively, and place them horizontally on a horizontal assembly table, with the placement positions symmetrical on the left and right; Place the third side plate of the first water-cooling element horizontally against the bottom of the first rectangular low-voltage coil, and place the fourth side plate upright against the right side of the first rectangular low-voltage coil. Securely connect the third and fourth side plates. Install the two symmetrical side plates of the second water-cooling element in the same manner. Install one end of the first upper iron yoke clamp to the second mounting claw of the third side plate of the first water-cooling element, and the other end to a symmetrical position on the second water-cooling element. Complete the installation of the first lower iron yoke clamp in the same manner. At this point, the first upper iron yoke clamp, the first lower iron yoke clamp, the third side plate of the first water-cooling element, and the symmetrically placed side plates of the second water-cooling element form a core lamination mounting plane. The upper yoke support plate and the first lower yoke support plate are respectively mounted on the first upper yoke clamp and the first lower yoke clamp, and the pre-processed laminations are inserted one by one from the inside to the outside on the core lamination mounting plane, and all the laminations are stacked in sequence, and the core is fastened to complete the core stacking; Install the first side plate of the first water-cooling element between the first rectangular low-voltage coil and the first iron core column. Install the symmetrical side plate of the second water-cooling element in the same manner. Use the third transverse tension screw to tighten and secure the iron core along the width of the window. Securely connect the side plates of the water-cooling element. Install the second side plate of the first water-cooling element between the first rectangular low-voltage coil and the first core leg, install the side plate of the second water-cooling element at a symmetrical position in the same manner, and fix the side plates of the water-cooling element together; A plurality of longitudinal tension screws are used to longitudinally tighten and secure the first upper yoke clamp, the first lower yoke clamp, and the coil along the window height direction; the upper yoke support plate and the first lower yoke support plate are respectively installed on the second upper yoke clamp and the second lower yoke clamp; and a plurality of longitudinal tension screws are used to longitudinally tighten and secure the second upper yoke clamp, the second lower yoke clamp, and the coil along the window height direction; The first upper iron yoke clamp and the second upper iron yoke clamp are connected and fastened by a first transverse pull screw, and the first lower iron yoke clamp and the second lower iron yoke clamp are connected and fastened by a second transverse pull screw; Install the E-shaped rubber pad in the middle area of ​​the lower surface of the lower iron yoke, ensuring that the third transverse pull screw can be installed in the two openings of the E-shaped rubber pad; Install the second lower iron yoke support plate; Stand the installed core, coil and clamps upright and suspend them in the air, install the first support frame, the second support frame and the third support frame, and place the medium frequency transformer on the ground after installation; Install the water inlet pipe and return pipe, with the height of the water inlet pipe slightly lower than that of the return pipe; The side plates of the first water-cooling part and the second water-cooling part are connected in series or in parallel through a hose to complete the assembly of the large-capacity ultra-thin oriented silicon steel medium-frequency transformer.

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