Iron core, preparation method, parameter setting method, equipment and storage medium

Abstract

The invention relates to an iron core, a preparation method, a parameter setting method, equipment and a storage medium. An upper iron yoke clamp and a lower iron yoke clamp; the upper iron yoke, the seamless lower iron yoke, the left-side iron core column and the right-side iron core column are located between the upper iron yoke clamping piece and the lower iron yoke clamping piece, made of an ultrathin oriented silicon steel material with the thickness smaller than or equal to 0.10 mm and provided with a multi-stage stepping seam, and the bent part is arranged on the left-side iron core column and the right-side iron core column. The left side iron core column pulling plates are located on the two sides of the left side iron core column; and the right side iron core column pulling plates are located on the two sides of the right side iron core column. The stacked iron core does not need to be subjected to heat treatment, and the prepared iron core is excellent in performance. According to the parameter setting method for the iron core, higher machining precision is achieved, and the problem that the precision cannot meet the requirement when a large-capacity iron core is manufactured through an ultra-thin oriented silicon steel material can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of transformer cores, and particularly relates to a core, a preparation method, a parameter setting method, an equipment and a storage medium. BACKGROUND

[0002] Ultra-thin oriented silicon steel has low medium-frequency loss and good processing performance, and is one of the main materials for medium-frequency transformer core in the fields of photovoltaic direct-current voltage boost, regional power grid flexible interconnection and offshore wind power direct-current collection. However, due to the thickness of the ultra-thin oriented silicon steel material being less than or equal to 0.10 mm, the existing core structure and preparation technology are limited, and the ultra-thin oriented silicon steel material is only widely used in small-capacity medium-frequency transformers with a capacity of several hundred kilowatts. There is a lack of ultra-thin oriented silicon steel core structure and preparation method suitable for large-capacity medium-frequency transformers, which limits the application and development of the ultra-thin oriented silicon steel in large-capacity medium-frequency transformers.

[0003] The existing medium-frequency transformer core structure mainly includes two types: one is a stacked core structure, and the other is a wound core structure. The stacked core structure is suitable for transformer cores of different capacities. When the stacked core structure is used, the ultra-thin oriented silicon steel material used needs to be longitudinally cut and obliquely cut. The existing oblique cutting equipment cannot meet the oblique cutting precision requirement, and there is a problem of large oblique cutting deviation, which seriously affects the performance of the stacked core. The wound core structure includes closed wound core structure and open wound core structure. The closed wound core structure is suitable for small-capacity transformer cores, and the core needs to be stress-relieved annealed. The open wound core structure is suitable for large-capacity transformer cores. Although this structure is convenient for the sleeving operation of the transformer winding, it has the problems of complex process and poor core performance after assembly. In addition, due to the increase of the operating frequency, it is difficult for the medium-frequency transformer core to dissipate heat, and the traditional heat dissipation method of setting air channels in the core cannot effectively control the core temperature, so it is urgent to develop a more efficient heat dissipation structure and ensure the core temperature. Therefore, it is urgent to develop a large-capacity ultra-thin oriented silicon steel core and a preparation method. SUMMARY

[0004] To solve the above technical problems, the present application provides a core, comprising:

[0005] an upper yoke clamp and a lower yoke clamp;

[0006] an upper yoke with multi-stage stepped joints made of ultra-thin oriented silicon steel material with a thickness of less than or equal to 0.10 mm, a lower yoke without joints, a left core column, a right core column and a bending between the upper yoke clamp and the lower yoke clamp;

[0007] left core column pull plates located on both sides of the left core column and right core column pull plates located on both sides of the right core column.

[0008] Further, the upper iron yoke clamping piece, the lower iron yoke clamping piece and the left and right iron core column pull plates are connected as a whole.

[0009] Further, the step distance of the upper iron yoke is 10-20 mm.

[0010] Further, the upper iron yoke clamping piece, the lower iron yoke clamping piece and the gap formed by the upper and lower iron yoke clamping pieces are filled with a heat-conducting filler.

[0011] Further, the iron core further comprises: an upper iron yoke support fixed to the middle position of the upper iron yoke clamping piece at the bottom of the upper iron yoke;

[0012] a lower iron yoke support fixed to the middle position of the lower iron yoke clamping piece at the bottom of the lower iron yoke;

[0013] Further, it further comprises: an iron core support frame arranged at the bottom of the two sides of the lower iron yoke clamping piece.

[0014] Further, the iron yoke clamping piece comprises a U-shaped channel steel, a first water-cooling plate arranged at the inner bottom of the U-shaped channel steel and a plurality of reinforcing ribs for fixing the first water-cooling plate and strengthening the strength of the U-shaped channel steel.

[0015] Further, the iron core column pull plate comprises a fixed plate closely arranged on the iron core column, a second water-cooling plate arranged in the fixed plate and a heat-conducting filler filled between the fixed plate and the second water-cooling plate.

[0016] Further, the heat-conducting filler comprises two layers of high-thermal-conductivity silica gel sheets and an aluminum nitride ceramic sheet sandwiched between the two layers of high-thermal-conductivity silica gel sheets.

[0017] Further, the thickness of the high-thermal-conductivity silica gel sheet is 0.5-1.0 mm.

[0018] Further, the total thickness of the heat-conducting filler is consistent with the thickness of the iron core column pull plate, and the width is consistent with the width of the iron yoke clamping piece.

[0019] The iron yoke clamping piece and the iron core column pull plate have the functions of clamping and high-efficiency heat dissipation, greatly reducing the temperature of the iron core, solving the problem that the traditional heat dissipation method cannot effectively control the temperature of the iron core and the iron core has high temperature and is difficult to dissipate heat.

[0020] Based on the same inventive concept, the application further provides a preparation method of the iron core, comprising the following steps:

[0021] The technical parameters of the iron core are determined, the size of each ultra-thin silicon steel sheet is calculated based on the technical parameters, and the ultra-thin silicon steel material is cut to obtain the ultra-thin silicon steel sheet.

[0022] Take the upper yoke clamp, the lower yoke clamp, the left side core column pull plate, the right side core column pull plate each 1 piece, lap for a whole, form a stacking plane with core lamination limiting function;

[0023] Stack the ultra-thin silicon steel laminations on the stacking plane, one piece at a time, in the order from inside to outside, complete the stacking of all laminations;

[0024] Take the left side core column pull plate, the right side core column pull plate, the upper yoke clamp, the lower yoke clamp each 1 piece, install on the stacking plane after stacking, complete the installation of the other side yoke clamp and core column pull plate, complete the preparation.

[0025] Further, after lapping the upper yoke clamp, the lower yoke clamp, the left side core column pull plate, the right side core column pull plate into a whole, take the heat-conducting filler, respectively fill in the gap formed by the core column pull plate and the yoke clamp on one side of the core after installation and the gap formed by the left side core column pull plate, the right side core column pull plate and the lower yoke clamp, form a stacking plane with core lamination limiting function.

[0026] The application also provides a parameter setting method for the core, comprising the following steps:

[0027] Determine the core parameter data, wherein the core parameters include: core window width W, core window height H, core thickness D, bending angle AN and thickness E of ultra-thin oriented silicon steel laminations;

[0028] Determine the number of ultra-thin oriented silicon steel laminations DT based on the core lamination thickness D and the thickness E of the ultra-thin silicon steel sheet;

[0029] Determine the number of lamination groups i, the number of laminations m in each group and the size of each lamination based on the bending angle AN, the core window width W and the core window height H.

[0030] Further, the size of each lamination includes:

[0031] The length of the ultra-thin oriented silicon steel lamination located at the left side core column position

[0032] The length of the ultra-thin oriented silicon steel lamination located at the left upper bending position

[0033] The length of the ultra-thin oriented silicon steel lamination located at the left side of the upper yoke

[0034] The length of the ultra-thin oriented silicon steel lamination located at the right side of the upper yoke

[0035] The length of the ultra-thin oriented silicon steel lamination located at the right upper bending position

[0036] The length of the ultra-thin grain-oriented silicon steel lamination located at the right core column position

[0037] The length of the ultra-thin grain-oriented silicon steel lamination located at the lower right bend position

[0038] The length of the ultra-thin grained silicon steel lamination located in the lower yoke

[0039] The length of the ultra-thin grain-oriented silicon steel lamination located at the lower left bend position

[0040] Where n represents the nth stacked piece counted from the inside out.

[0041] Furthermore, the number of stacked wafers DT is determined according to the following formula:

[0042]

[0043] in, This indicates rounding up, that is, the smallest integer greater than or equal to a.

[0044] Furthermore, the calculation methods for the number of stack groups i, the number of stacks m in each group, and the size of each stack are as follows:

[0045] Based on the bending angle AN, the core window width W, and the core window height H, set The initial length is y. Given an initial length of d, calculate the size of the first stacked piece:

[0046] Based on the size of the first stacked piece, and setting the step spacing to x, calculate the size of the nth stacked piece;

[0047] After calculating the bending dimensions of each piece, the following judgments are made:

[0048] like Then continue calculating the bending dimensions for the next piece;

[0049] like Then the calculation of the first set of stacked pieces is completed, and the number of pieces m in each set of stacked pieces is determined;

[0050] Calculate the number of stack groups i based on the number of stacks DT and the number of stacks in each group m;

[0051] If the number of stacks DT is divisible by the number of stacks m in each group, then the number of stacks m in each group is m.

[0052] If the number of stacks DT is not divisible by the number of stacks m in each group, then the number of stacks in groups 2 to i-1 is m, and the number of stacks in group i is r.

[0053] Based on the first group of the size of the laminations and the step distance x, the size of the 2th to i group of laminations is calculated.

[0054] Further, the size of the first group of laminations is calculated according to the following calculation formula:

[0055]

[0056] Wherein,

[0057] Further, the size of the i group of laminations is calculated according to the following calculation formula:

[0058]

[0059] Wherein, j=2, 3…i; k=1, 2, 3…, m.

[0060] The application further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected through a bus;

[0061] The memory is used for storing one or more programs.

[0062] When the one or more programs are executed by the at least one processor, the parameter setting method of the core provided by the application is realized.

[0063] The application further provides a readable storage medium, which has an execution program stored thereon, and the execution program is executed to realize the parameter setting method of the core provided by the application.

[0064] Compared with the prior art, the application has the following beneficial effects:

[0065] The core provided by the application comprises an upper yoke clamp, a lower yoke clamp, an upper yoke with a plurality of stepped joints made of ultra-thin oriented silicon steel material with a thickness of less than or equal to 0.10 mm, a lower yoke without joints, a left side core column, a right side core column, and a bending part located between the upper yoke clamp and the lower yoke clamp, a left side core column pull plate located on both sides of the left side core column, and a right side core column pull plate located on both sides of the right side core column. The large-capacity ultra-thin oriented silicon steel core is a multi-step angle opening core with an upper yoke, which uses ultra-thin oriented silicon steel with a thickness of less than or equal to 0.10 mm. The stacked core does not need to be heat treated. The ultra-thin oriented silicon steel has high magnetic permeability, low hysteresis loss, low iron loss, and high saturation magnetic induction intensity, so that the core shows higher efficiency, lower loss, and longer service life in transformer, motor and other equipment.

[0066] The core preparation method has simple manufacturing process, solves the problems of poor shearing precision of traditional lamination core, difficulty in inserting iron yoke, incapability of coil sleeving of closed core, complex process of open core and poor performance of assembled core.

[0067] The core parameter setting method has higher machining precision, and can effectively solve the problem that the precision of the large-capacity core made of the ultra-thin oriented silicon steel material cannot meet the requirements. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 It is a structure schematic diagram of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0069] Figure 2 It is a 10-stage step joint schematic diagram of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0070] Figure 3 It is a structure schematic diagram of the iron yoke clamp of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0071] Figure 4 It is a structure schematic diagram of the core column pull plate of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0072] Figure 5 It is a structure schematic diagram of the heat-conducting filler of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0073] Figure 6 It is a main technical parameter schematic diagram of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0074] Figure 7 It is a lamination schematic diagram formed after the n-th lamination of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application is subjected to eight-fold shearing operation;

[0075] Figure 8 It is a core placement diagram of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application after the bending and shearing are completed;

[0076] Figure 9 It is an installation schematic diagram of the iron yoke clamp and the core column pull plate of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0077] Figure 10 It is a lamination plane with lamination limiting function of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0078] Figure 11 It is an installation schematic diagram of the laminations on the lamination plane of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0079] Figure 12 Figure 2 is a schematic view of the installation of the other side pull plate and heat-conducting filler of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0080] Figure 13 Figure 3 is a schematic view of the installation of the other side pull plate, clamp and support of the large-capacity ultra-thin oriented silicon steel core of the embodiment of the present application;

[0081] Figure 14 Figure 4 is a schematic view of the structure of the electronic device of the present application;

[0082] Figure 1 is a schematic view of the structure of the large-capacity ultra-thin oriented silicon steel core of the present application, wherein 1 is an upper yoke, 2 is a lower yoke, 3 is a left core column, 4 is a right core column, 5 is a bending, 6 is an upper yoke clamp, 7 is a lower yoke clamp, 8 is a left core column pull plate, 9 is a right core column pull plate, 10 is a pin, 11 is a heat-conducting filler, 12 is an upper yoke support, 13 is a lower yoke support, 14 is a core support frame, 15 is a multi-stage stepping joint, 16 is a U-shaped channel steel, 17 is a first water-cooling plate, 18 is a reinforcing rib, 19 is a fixed plate, 20 is a second water-cooling plate, 21 is a high-thermal-conductivity silicone sheet, and 22 is an aluminum nitride ceramic sheet. DETAILED DESCRIPTION

[0083] The present application will be further described below in conjunction with the drawings and embodiments. The following embodiments are provided to better further understand the present application and are not limited to the best mode of the present application, and do not limit the content and protection scope of the present application. Any person under the inspiration of the present application or the combination of the present application with other prior art features to obtain any product same or similar to the present application falls within the protection scope of the present application.

[0084] Embodiment 1

[0085] The present embodiment provides a large-capacity ultra-thin oriented silicon steel core, the window height H of which is 360 mm, the window width W of which is 228 mm, the lamination thickness D of which is 47 mm, the ultra-thin silicon steel sheet width P of which is 60 mm, the ultra-thin silicon steel sheet thickness E of which is 0.10 mm, the bending angle AN of which is 135°, the innermost lamination bending length d of which is 5 mm, the stepping distance x of which is 20 mm, and the distance y of the innermost lamination joint from the bending area is 20 mm, and the specific structure is shown in FIG. 1. Figure 1

[0086] ​The upper yoke 1 is made of 0.10mm-thick ultra-thin oriented silicon steel material containing stepwise joints, the lower yoke 2 is made of 0.10mm-thick ultra-thin oriented silicon steel material without joints, the left core column 3 is made of 0.10mm-thick ultra-thin oriented silicon steel material, the right core column 4 is made of 0.10mm-thick ultra-thin oriented silicon steel material, the bending 5 is made of 0.10mm-thick ultra-thin oriented silicon steel material with a bending angle of 135°, the upper yoke clamping piece 6 is used for clamping the upper yoke and has the functions of cooling and clamping, the lower yoke clamping piece 7 is used for clamping the lower yoke and has the functions of cooling and clamping, the left core column pull plate 8 is connected with the upper yoke clamping piece 6 and the lower yoke clamping piece 7 and has the functions of cooling and clamping, the right core column pull plate 9 is connected with the upper yoke clamping piece 6 and the lower yoke clamping piece 7 and has the functions of cooling and clamping, the left core column pull plate 8 and the right core column pull plate 9 are located on both sides of the core column and are close to the surface of the core column, the upper yoke clamping piece 6 and the lower yoke clamping piece 7 are respectively located on both sides of the upper yoke and on both sides of the lower yoke, the left core column pull plate 8, the right core column pull plate 9, the upper yoke clamping piece 6 and the lower yoke clamping piece 7 are connected into a whole through the pin 10 in a lap joint mode with the core column pull plate inside and the yoke clamping piece outside.

[0087] The gap formed by the upper yoke clamping piece 6 and the lower yoke clamping piece 7 is filled with a heat-conducting filler 11, the upper yoke clamping piece 6 is provided with an upper yoke support 12 at the middle position, and the upper yoke support 12 is located at the bottom of the upper yoke 1, the lower yoke clamping piece 7 is provided with a lower yoke support 13 at the middle position, and the lower yoke support 13 is located at the bottom of the lower yoke 2.

[0088] The core support frame 14 is arranged at the bottom of both sides, and the lower yoke support 13 and the core support frame 14 are located at the bottom of the lower yoke 2.

[0089] The upper yoke 1 has multiple stepwise joints, the stepwise interval distance is 20mm, one piece is one stack, the stacking sequence is from inside to outside, and the stepwise number is automatically determined as 10 according to the yoke length and the stepwise length. Figure 2 The multiple stepwise joints 15 are shown in the attached

[0090] The upper yoke clamping piece 6 and the lower yoke clamping piece 7 for clamping the yoke are made of a U-shaped channel steel 16 of non-magnetic steel with a model of 20Mn23AlV, a thickness of 6mm, a length of 400mm, and an inside notch width of 37mm, an aluminum first water cooling plate 17 with a thickness of 10mm, a length of 322mm, a water resistance ≤0.20MPa, and an inlet water flow rate ≥2m / s arranged at the inside bottom of the U-shaped channel steel 16, and five non-magnetic reinforcing ribs 18 of 20Mn23AlV with a thickness of 6mm, a length of 20mm, and a height of 37mm, which are welded to form an integral clamping piece structure. Figure 3 The upper yoke clamping piece structure and the lower yoke clamping piece structure are shown in the attached

[0091] The left and right core column tie plates 8 and 9 include a fixing plate 19 made of non-magnetic steel plate (model 20Mn23AlV, thickness 6mm, length 454mm, matching the core height) at the bottom. One side of the fixing plate 19 is in close contact with the core column surface. At the two ends of the opposite side, where it connects to the tie plate, are pins 10 with a diameter of 20mm. Between the two pins 10, from the tie plate surface outwards, are arranged a heat-conducting filler 11 (228mm long, 6mm thick, width 47mm, matching the yoke thickness) and a second aluminum water-cooling plate 20 (10mm thick, 320mm long, water resistance ≤0.20MPa, water flow velocity ≥2m / s). The non-magnetic steel plate fixing plate 19, heat-conducting filler 11, and second aluminum water-cooling plate 20 are connected by screws to form an integral tie plate structure. The structures of the left and right core column tie plates are shown in the attached diagram. Figure 4 .

[0092] The structure of the thermally conductive filler 11 is shown in the attached figure. Figure 5 As shown, it comprises two layers of high thermal conductivity silicone pads 21 and one layer of aluminum nitride ceramic pad 22. The two layers of high thermal conductivity silicone pads 21 are respectively located on two sides of the aluminum nitride ceramic pad 22, sandwiching the aluminum nitride ceramic pad 22 in the middle. The thickness of the high thermal conductivity silicone pad 21 is 1.0 mm and the thermal conductivity is 8.0 W / (m·K). The thickness of the aluminum nitride ceramic pad 22 is 4 mm and the thermal conductivity is 160 W / (m·K).

[0093] The thermally conductive filler 11 is also placed in the gap between the upper yoke 1 and the upper yoke clamp 6, and in the gap between the lower yoke 2 and the upper yoke clamp 7, as shown in the appendix. Figure 1 As shown. Its total thickness is the same as the thickness of the fixing plate 19 of the core column tie plate, and its width is the same as the width of the yoke clamp. The high thermal conductivity silicone sheet 21 of the thermally conductive filler 11 has a thickness of 1.0 mm and a thermal conductivity of 8.0 W / (m·K), and the aluminum nitride ceramic sheet 22 has a thickness of 4 mm and a thermal conductivity of 160 W / (m·K).

[0094] Example 2

[0095] This embodiment provides a method for setting the parameters of the iron core as described in Embodiment 1, including the following steps:

[0096] 1) The main technical parameters of the folded corner open core are determined, including a rectangular core window height H of 360 mm, a window width W of 228 mm, a lamination thickness D of 47 mm, an ultra-thin silicon steel sheet width P of 60 mm, an ultra-thin silicon steel sheet thickness E of 0.10 mm, a bending angle AN of 135°, a most inner lamination bending length d of 5 mm, a step distance x of 20 mm, and a most inner lamination joint distance y from the bending area of 20 mm. The main technical parameters of the folded corner open core are shown in FIG. 1. Figure 6

[0097] 2) The lamination number and the step number are calculated according to the technical parameters of the core in step 1), and the bending size of each ultra-thin silicon steel sheet is calculated from inside to outside. The bending size of each lamination includes nine parameters, respectively as follows: wherein n represents the nth lamination, represents the length of the ultra-thin silicon steel sheet at the left core column position of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the left upper bending position of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the left side of the upper yoke of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the right side of the upper yoke of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the right upper bending position of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the right core column position of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the right lower bending position of the nth lamination, represents the length of the ultra-thin silicon steel sheet at the lower yoke, represents the length of the ultra-thin silicon steel sheet at the left lower bending position of the nth lamination. As shown in FIG. 2. Figure 7

[0098] The core lamination number DT is calculated according to formula (1), and DT is 470 calculated.

[0099]

[0100] The core bending size is calculated in groups, and the number of groups is represented by i, and the number of laminations in each group is consistent with the core step number, represented by m. The number of laminations in each group and the core step number are calculated as follows:

[0101] The bending size of each lamination in the first group of laminations is calculated from inside to outside according to formula (2):

[0102]

[0103] wherein,

[0104]

[0105] After the calculation of the bending size of each lamination is completed, the following judgment is made:​​

[0106] If then the calculation of the bending size of the next sheet in the first group of sheets is continued according to formula (2);

[0107] If then the calculation of the size of the first group of sheets is stopped, and the number of sheets in each group and the number of steps m = n - 1 of the core are determined;

[0108] The calculation results of the bending size of each sheet in the first group of sheets are shown in Table 1, and the number of sheets in each group and the number of steps of the core are 10 after calculation.

[0109] Table 1 Calculation results of the bending size of each sheet in the first group of sheets

[0110]

[0111] The calculation method of the number of groups i is as follows:

[0112] According to the number of core sheets DT and the number of sheets m in each group, the parameter r is calculated according to formula (4):

[0113]

[0114] If r > 0, the number of groups i is The number of sheets in each of the second to (i-1)th groups is m, and the number of sheets in the ith group is r;

[0115] The bending size of the sheets in the second to (i-1)th groups is calculated according to formula (5):

[0116]

[0117] The bending size of the sheets in the ith group is calculated according to formula (6):

[0118]

[0119] If r = 0, the number of groups i is The number of sheets in each of the second to ith groups is m;

[0120] The bending size of the sheets in the second to ith groups is calculated according to formula (7):

[0121]

[0122] After calculation, r = 0, the number of groups i = 47, and the bending size of the sheets in the second to 47th groups is calculated according to formula (7), and the calculation results are shown in Table 2.

[0123] Table 2 Calculation results of the bending size of each sheet in the second to 47th groups of sheets

[0124]

[0125]

[0126] Example 3

[0127] The present embodiment provides a method for preparing the core as described in Example 1, comprising the following steps:

[0128] 1) According to the bending size of each sheet of ultra-thin silicon steel calculated in Example 2, the total length w of the ultra-thin silicon steel material is calculated according to formula (8) as 622m.

[0129]

[0130] 2) The ultra-thin silicon steel material is longitudinally divided into strips, with a strip width of 60mm and a shearing length of 20% of the ultra-thin silicon steel material required for core preparation, which is 746.4m.

[0131] 3) The ultra-thin silicon steel strip after longitudinal division is sent to the bending machine, and the bending and shearing operation is performed in the mode of eight bends and one cut. The bending length sent to the bending machine is sequentially performed according to the order of , and every time a bending size is reached, it is bent once at an angle of 135°. After eight consecutive bends, the length of is sent in, and the ultra-thin silicon steel is cut once, and after the eight bends and one cut operation of the sheet of laminations is completed, the bending of the sheet of laminations is completed. The Figure 7 is the schematic diagram of the laminations formed after the eight bends and one cut operation of the nth sheet of laminations are completed.

[0132] 4) The bending and shearing operation is performed from the inside to the outside for each sheet according to step 3), until the bending of the nth sheet of laminations is completed. After the bending of each sheet of laminations is completed, it is placed in the order from the inside to the outside, and the outer laminations are sleeved on the outside of the inner laminations. The core after the bending and shearing operation is placed as shown in the Figure 8 .

[0133] 5) After the bending of all laminations is completed, take one upper yoke clamp 6 and one lower yoke clamp 7. Place the U-shaped channel steel slots of the upper yoke clamp 6 and the lower yoke clamp 7 downward horizontally on the ground, and symmetrically distribute the positions up and down. Complete the placement of the iron core on one side of the yoke clamp, as shown in the Figure 9 .

[0134] 6) Take one left core column pull plate 8 and one right core column pull plate 9. Install the left core column pull plate 8 with the pin 10 into the pin hole reserved on the left side of the upper yoke clamp 6 and the lower yoke clamp 7. Install the right core column pull plate 9 with the pin 10 into the pin hole reserved on the right side of the upper yoke clamp 6 and the lower yoke clamp 7, complete the lapping installation of the core column pull plate on one side of the core, as shown in the Figure 9 .

[0135] 7) Take one piece of upper yoke support 12 and one piece of lower yoke support 13. Fix one end of the upper yoke support 12 to the upper yoke clamp 6 on the side of the core where the installation has been completed, and do not fix the other end which is symmetrical to its position. Fix one end of the lower yoke support 13 to the lower yoke clamp 7 on the side of the core where the installation has been completed, and do not fix the other end which is symmetrical to its position. See attached Figure 10 ;

[0136] 8) Take two pieces of heat-conducting filler 11, and fill them into the gaps formed by the left and right core column pull plates and the upper yoke clamp on the side of the core where the installation has been completed, and the gaps formed by the left and right core column pull plates 8 and 9 and the lower yoke clamp 7. Place one wide surface of the heat-conducting filler 11 in the gap of the upper yoke clamp 6 close to the upper yoke clamp 6 and the upper yoke 1, and the narrow surface close to the upper yoke support 12. Place one wide surface of the heat-conducting filler 11 in the gap of the lower yoke clamp close to the lower yoke clamp and the lower yoke, and the narrow surface close to the upper yoke support 13. At this time, the upper yoke clamp 6, the lower yoke clamp 7, the left core column pull plate 8, the right core column pull plate 9, the upper yoke support 12, the lower yoke support 13 and the heat-conducting filler 11 on the side of the core where the installation has been completed form a stacking plane with core lamination limiting function. See attached Figure 10 ;

[0137] 9) Stack the core laminations on the plane, and stack them from the inside out. Take the first piece of core lamination, place its narrow surface towards the lower yoke 7, and place it along the inner edges of the upper yoke clamp 6, the lower yoke clamp 7, the left core column pull plate 8 and the right core column pull plate 9 on the side of the core where the installation has been completed, so that the joint of the first piece of core lamination is located on the upper yoke clamp and its filler, and its wide surface is close to the upper yoke support 12. Complete the placement of the first piece of core lamination.

[0138] 10) Take the second piece of core lamination, place its narrow surface downwards and its wide surface close to the outside of the wide surface of the first piece of core lamination, so that the joint of the strip is located on the upper yoke clamp and its filler.

[0139] 11) Repeat step 10) until all core laminations are stacked to form a folding angle stacking core from the inside out. See attached Figure 11 ;

[0140] 12) Take one piece of left core column pull plate 8 and one piece of right core column pull plate 9. Place the left core column pull plate 8 on the upward end face of the left core column 3, and place the right core column pull plate 9 on the upward end face of the right core column 4, so that the edges of the left and right core column pull plates 8 and 9 are aligned with the outer edges of the core. Complete the placement of the core column pull plates on the other side of the core.

[0141] 13) Take each one of the heat-conductive fillers 11 and place them on the upper and lower yoke end faces of the core with the upward-facing core, specifically in the gaps formed by the upper yoke 1 and the left and right core column pull plates 8, 9 and the lower yoke 2 and the left and right core column pull plates 8, 9, and align the edges of the heat-conductive fillers 11 with the edges of the upper and lower yokes, with the narrow face of the heat-conductive filler 11 placed on the upper yoke end face abutting the upper yoke support 12, and the narrow face of the other heat-conductive filler 11 placed on the lower yoke end face abutting the upper yoke support 13, as shown in the accompanying Figure 12 ;

[0142] 14) Take each one of the upper yoke clamping pieces 6 and the lower yoke clamping pieces 7. Fit the upper yoke clamping pieces 6 and the lower yoke clamping pieces 7 with the pre-drilled pin holes onto the pins of the left and right core column pull plates 8, 9 installed on the other side of the core, to complete the installation of the clamping pieces on the other side of the core.

[0143] 15) Connect the clamping pieces installed on one side of the core with the clamping pieces installed on the other side of the core by tightening the bolts and tighten the core;

[0144] 16) Fix the ends of the upper yoke support 12 and the lower yoke support 13 that have not been fixed onto the upper and lower clamping pieces of the core on the other side, to support the upper and lower yokes of the core, as shown in the accompanying Figure 13 ;

[0145] 17) Use the magnetic crane to lift the core, and after lifting, install the core support frame 14 at the ends of the lower clamping pieces of the core;

[0146] 18) After completing the installation of the core support frame 14, turn over and stand up the core, with the core support frame 14 on the ground supporting the entire core, as shown in the accompanying Figure 1 ;

[0147] 19) Connect the water paths of the water-cooled plates in parallel by using hoses, the internal water path of the water-cooled plate is a U-shaped water path arranged along the length direction of the water-cooled plate, the water path has a diameter of 5 mm, and a temporary coil is wound around one core column, the temporary coil has 10 turns, the no-load loss of the core under a sinusoidal working magnetic density of 1.20 T at a frequency of 600 Hz is 837 W, and the steady-state core temperature rise is 31 k;

[0148] 20) After the test is completed, remove the water path and the temporary coil, and complete the preparation of the core.

[0149] Example 4

[0150] As Figure 14As shown, the present application also provides an electronic device, which can be a computer device, a single-chip microcomputer device, a smart mobile device, etc. The electronic device in the embodiment can include a processor, a memory, a transceiver component, etc. The memory, the processor and the transceiver component are connected through a bus; the memory can be used to store an execution program, and the exemplary execution program can include instructions; the processor is used to execute the instructions stored in the memory. The memory can also be used to store data, which can be called and / or modified when the instructions are executed.

[0151] The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, and are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions in the storage medium to implement a corresponding method flow or a corresponding function, so as to implement the steps of the intermediate frequency transformer core parameter setting method in one of the above embodiments.

[0152] Embodiment 5

[0153] Based on the same inventive concept, the present application also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device and is used to store programs and data. It can be understood that the storage medium here can include the built-in storage medium in the electronic device, and of course can also include the expansion storage medium supported by the electronic device. The storage medium provides a storage space, and the storage space stores the operating system of the terminal. Moreover, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and 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 core parameter setting method in one of the above embodiments.

[0154] Comparative Example 1

[0155] A rectangular closed winding core is made of 0.10 mm thick ultra-thin oriented silicon steel material through the processes of slitting, winding, heat treatment and paint dipping and curing. The core has the same main size parameters as the example, a window height of 360 mm, a window width of 228 mm, a winding thickness of 47 mm and an ultra-thin silicon steel strip width of 120 mm. The core clamp and pull plate are of traditional natural cooling without water cooling function structure.

[0156] Comparative Example 2

[0157] A rectangular laminated core is made of 0.10 mm thick ultra-thin oriented silicon steel material through the processes of slitting, winding, heat treatment and paint dipping and curing. The core has the same main size parameters as the example, a window height of 360 mm, a window width of 228 mm, a winding thickness of 47 mm and an ultra-thin silicon steel strip width of 120 mm. The core clamp and pull plate are of traditional natural cooling without water cooling function structure.

[0158] Comparative Example 3

[0159] A rectangular closed winding core is made of 0.10 mm thick ultra-thin oriented silicon steel material through the processes of slitting, winding, heat treatment and paint dipping and curing. The core has the same main size parameters as the example, a window height of 360 mm, a window width of 228 mm, a winding thickness of 47 mm and an ultra-thin silicon steel strip width of 120 mm. The core clamp and pull plate are of traditional natural cooling without water cooling function structure.

[0160] Comparative Example 4

[0161] A rectangular laminated core is made of 0.10 mm thick ultra-thin oriented silicon steel material through the processes of slitting, winding, heat treatment and paint dipping and curing. The core has the same main size parameters as the example, a window height of 360 mm, a window width of 228 mm, a winding thickness of 47 mm and an ultra-thin silicon steel strip width of 120 mm. The core clamp and pull plate are of traditional natural cooling without water cooling function structure.

[0162] Comparative Example 5

[0163] A rectangular closed winding core is made of 0.10 mm thick ultra-thin oriented silicon steel material through the processes of slitting, winding, heat treatment and paint dipping and curing. The core has the same main size parameters as the example, a window height of 360 mm, a window width of 228 mm, a winding thickness of 47 mm and an ultra-thin silicon steel strip width of 120 mm. The core clamp and pull plate are of traditional natural cooling without water cooling function structure.

[0164] Comparative Example 6

[0165] A rectangular opening winding core with air channel is composed of two winding cores with a window height of 360 mm, a window width of 228 mm, a winding thickness of 47 mm, and an ultra-thin silicon steel strip width of 60 mm, and an air channel with a width of 10 mm between the two cores. The core is made of ultra-thin oriented silicon steel material with a thickness of 0.10 mm, and is made by processes such as slitting, winding, heat treatment, paint dipping and curing, and cutting and grinding. The core clamp and the pull plate are of the traditional natural cooling structure without water cooling function.

[0166] Test example

[0167] The cores prepared from the examples and Comparative Examples 1-6 were tested for performance, and the results are shown in Table 3.

[0168] Table 3 Core loss test results

[0169] Group Core loss Core temperature rise Remark Example 837.6W 31k No annealing required Comparative Example 1 837.3W 130k Annealing required Comparative Example 2 893.9W 143k No annealing required Comparative Example 3 841.0W 112k Annealing required Comparative Example 4 899.3W 127k No annealing required Comparative Example 5 921.1W 156k Annealing required Comparative Example 6 924.9W 139k Annealing required Annealing required

[0170] The core losses and temperature rises of the cores of the examples, Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4, Comparative Example 5, and Comparative Example 6 in Table 1 were measured at a frequency of 600 Hz and a sinusoidal working flux density of 1.20 T. The no-load loss of the example was comparable to that of Comparative Example 1 and Comparative Example 3, the example did not need to be annealed and cured with paint, the process was simpler, and the core could be fitted with a coil, solving the problem of the application of closed winding cores in large-capacity transformers. Comparative Example 2 and Comparative Example 4 were traditional lamination core structures that could be fitted with a coil, but due to large shear errors, high additional losses were generated after lamination, and the no-load loss was relatively high compared to the example. Comparative Example 5 was an open winding core that could be fitted with a coil, but the core loss caused by cutting was much higher than that of the example. The loss of the example was close to that of Comparative Example 1 and Comparative Example 3, about 6.5% lower than that of Comparative Example 2 and Comparative Example 4, solving the problem of poor shear precision and difficult insertion of traditional lamination cores, and about 10% lower than that of Comparative Example 5 and Comparative Example 6, solving the problem of complex process and performance degradation of assembled cores.

[0171] The example had a clamp and a pull plate with a water-cooled heat dissipation function. Comparative Example 1, Comparative Example 2, and Comparative Example 5 had no air channel inside the core, and Comparative Example 3, Comparative Example 4, and Comparative Example 6 contained a 10 mm air channel inside the core. The temperature rise of the example was reduced by about 3 times, 2.5 times, and 4 times compared to Comparative Example 1, Comparative Example 3, and Comparative Example 5, respectively. The temperature rise of the example was reduced by about 3.6 times, 3.1 times, and 3.5 times compared to Comparative Example 2, Comparative Example 4, and Comparative Example 6, respectively. The example had more efficient heat dissipation and lower core temperature, solving the problem of high core temperature and difficult heat dissipation.

[0172] The above merely illustrates the embodiments of the present application, but should not be taken as limitations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall fall into the protection scope of the present application.

Claims

1. A core, characterized by Comprise: Upper yoke clip (6), lower yoke clip (7); The upper yoke (1) containing multi-stage stepped joints made of ultra-thin oriented silicon steel material with thickness ≤0.10mm, the jointless lower yoke (2), the left side core column (3), the right side core column (4), the bending (5) are located between the upper yoke clip (6) and the lower yoke clip (7). The left side core column pull plate (8) located on both sides of the left side core column (3) and the right side core column pull plate (9) located on both sides of the right side core column (4).

2. The core of claim 1, characterized in that The upper yoke clip (6), lower yoke clip (7) and left side core column pull plate (8), right side core column pull plate (9) are lapped into a whole.

3. The core of claim 1, wherein The step distance of the upper yoke (1) is 10-20mm.

4. The core of claim 1, wherein The upper yoke clip (6), lower yoke clip (7) and the gap formed by the upper yoke clip (6) and the lower yoke clip (7) are filled with heat-conducting filler (11).

5. The core of claim 1, wherein Also include: The upper yoke support (12) located at the bottom of the upper yoke (1) and fixed at the middle position of the upper yoke clip (6); The lower yoke support (13) located at the bottom of the lower yoke (2) and fixed at the middle position of the lower yoke clip (7).

6. The core of claim 1, wherein Also include: The core support frame (14) arranged at the bottom of both sides of the lower yoke clip (7).

7. The core of claim 1, wherein The yoke clip includes a U-shaped channel steel (16), a first water-cooled plate (17) arranged at the bottom of the inner side of the U-shaped channel steel (16), and a plurality of reinforcing ribs (18) for fixing the first water-cooled plate (17) and strengthening the strength of the U-shaped channel steel (16).

8. The core of claim 1, wherein The core column pull plate includes a fixed plate (19) closely arranged on the core column, a second water-cooled plate (20) arranged in the fixed plate (19), and a heat-conducting filler (11) filled between the fixed plate (19) and the second water-cooled plate (20).

9. The core of claim 4 or 8, characterized in that The heat-conducting filler (11) includes two layers of high-thermal-conductivity silica gel sheets (21) and an aluminum nitride ceramic sheet (22) sandwiched between the two layers of high-thermal-conductivity silica gel sheets (21).

10. The core of claim 9, wherein The thickness of the high-thermal-conductivity silica gel sheet (21) is 0.5-1.0mm.

11. The core of claim 4, wherein The total thickness of the heat-conducting filler (11) is consistent with the thickness of the core column pull plate, and the width is consistent with the width of the yoke clip.

12. A method of producing the core as claimed in any one of claims 1 to 11, characterized in that, The steps include: Determine the core technical parameters, calculate the size of each ultra-thin silicon steel sheet based on the technical parameters, and cut the ultra-thin silicon steel material to obtain the ultra-thin silicon steel sheet; Take one upper yoke clip, one lower yoke clip, one left side core column pull plate and one right side core column pull plate, and lap them into a whole to form a stacking plane with core sheet limiting function; Stack the ultra-thin silicon steel sheets on the stacking plane, one by one, in the order from inside to outside, and complete the stacking of all sheets; Take one left side core column pull plate, one right side core column pull plate, one upper yoke clip and one lower yoke clip, and install them on the stacked stacking plane to complete the installation of the other yoke clip and core column pull plate, and complete the preparation.

13. The method of claim 12, wherein, After the upper yoke clamp, the lower yoke clamp, the left side core column pull plate and the right side core column pull plate are overlapped into a whole, a heat-conducting filler is taken and filled in the gap formed by the core column pull plate and the yoke clamp on one side of the core and the gap formed by the left side core column pull plate, the right side core column pull plate and the lower yoke clamp, to form a stacking plane with core lamination limiting function.

14. A method of setting the parameters of the core according to any one of claims 1 to 11, characterized in that, The method comprises the following steps: determining core parameter data, wherein the core parameters include core window width W, core window height H, core thickness D, bending angle AN and thickness E of the ultra-thin oriented silicon steel sheet; determining the number DT of the ultra-thin oriented silicon steel sheets based on the core sheet thickness D and the thickness E of the ultra-thin silicon steel sheet; determining the number i of the lamination groups, the number m of the lamination sheets in each group and the size of each lamination sheet based on the bending angle AN, the core window width W and the core window height H.

15. The setting method according to claim 14, characterized in that The size of each lamination sheet comprises: Length of the ultrathin oriented silicon steel sheet located at the left core leg position Length of an ultra-thin grain-oriented silicon steel sheet located at a left upper bending position Length of the ultra-thin oriented silicon steel sheet located on the left side of the upper iron yoke Length of the ultra-thin oriented silicon steel sheet located on the right side of the upper iron yoke Length of an ultra-thin grain-oriented silicon steel sheet located at a right upper bending position Length of the ultrathin oriented silicon steel sheet located at the right core leg position Length of an ultra-thin grain-oriented silicon steel sheet located at a right lower bending position Length of ultra-thin oriented silicon steel laminations located in lower iron yoke Length of an ultra-thin grain-oriented silicon steel sheet located at a lower left bending position wherein n represents the nth lamination sheet counted from the inside to the outside.

16. The setting method according to claim 14, characterized by The number DT of the lamination sheets is determined according to the following formula: wherein represents the ceiling, i.e. the smallest integer greater than or equal to a.

17. The setting method according to claim 16, characterized in that The calculation method of the number i of the lamination groups, the number m of the lamination sheets in each group and the size of each lamination sheet is as follows: Based on the core window width W, the core window height H, and the bending angle AN, set The initial length of y, The initial length of d, calculate the size of the first sheet of laminations: based on the size of the first lamination sheet, setting the step distance as x and calculating the size of the nth lamination sheet; after the calculation of the size of each lamination sheet is completed, the following judgment is made: If then the calculation of the next piece of bending size is continued; If then the calculation of the first set of lamination dimensions is completed, determining the number of laminations m for each set; determining the number i of the lamination groups according to the number DT of the lamination sheets and the number m of the lamination sheets in each group; if the number DT of the lamination sheets can be divided by the number m of the lamination sheets in each group, the number of the lamination sheets in each group is m; if the number DT of the lamination sheets cannot be divided by the number m of the lamination sheets in each group, the number of the lamination sheets in the second to i-1 groups is m and the number of the lamination sheets in the i group is r; based on the size of the first group of lamination sheets and the step distance x, the size of the second to i groups of lamination sheets is calculated.

18. The setting method according to claim 17, characterized by, The size of the first group of lamination sheets is calculated according to the following formula: wherein, n = 1, 2, 3...m.

19. The setting method according to claim 17, wherein The size of the i group of lamination sheets is calculated according to the following formula: wherein j=2, 3…i; k=1, 2, 3…, m.

20. An electronic device, comprising: comprise: at least one processor and a memory; the memory and the processor are connected through a bus; the memory is used for storing one or more programs; when the one or more programs are executed by the at least one processor, the parameter setting method of the core is realized as claimed in any one of claims 14 to 19.

21. A readable storage medium characterized by, The execution program is stored thereon, and when the execution program is executed, the parameter setting method of the core is realized as claimed in any one of claims 14 to 19.

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