Stacked iron core structure design method

Abstract

The invention provides a stacked iron core structure design method, which relates to the technical field of intelligent design, and comprises the following steps: constructing a design parameter library, inputting basic design parameters of an iron core structure, and keeping a window center unchanged in each level of window; taking the center of the main-level window as a fixed reference, inputting the transverse and longitudinal numbers of the main-level window and the width and height of the main-level window, and sequentially deducing the width, height and central position of other-level windows by combining with column section-level definition data; calculating a vertical column size and a horizontal column size according to the size and the position of each level of window in combination with column section level definition data and a splicing mode, and generating a sheet shape and size range adaptive to each window level; and the sheet type and the splicing structure are specially adjusted according to local design requirements. According to the method, the problems of high manual dependence, low efficiency, poor adaptability, material waste and the like in a traditional design method can be solved, and support is provided for automation, digitization and intellectualization of transformer production.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent design, and in particular to a stacked core structure design method. Background Art

[0002] Transformers are key equipment for achieving efficient transmission and conversion of electric energy in power systems. Its working principle is based on electromagnetic induction, and the iron core is the core component of the transformer, responsible for carrying magnetic flux and limiting magnetic flux leakage, thereby improving the conversion efficiency of electromagnetic energy. The iron core is usually stacked with high-permeability silicon steel sheets. Its design is not only directly related to the electrical performance of the transformer (such as loss, efficiency, etc.), but also involves mechanical properties (such as earthquake resistance and heat dissipation, etc.) and material utilization. Since the iron core structure is an important part of the transformer, its design is extremely complex and targeted.

[0003] At present, the main difficulty faced by transformer manufacturers in the core structure design lies in the source and processing of design drawings. Design drawings are usually divided into two categories: one is the internal drawings independently developed by the internal design team of the enterprise according to technical standards and market demand; the other is the drawings (such as CAD files) provided by external customers when commissioning processing. Due to the lack of unified industry design standards, the differences in design details and expressions of design drawings from different sources increase the difficulty of converting design solutions. In addition, the lack of means to quickly convert CAD drawings into digital information that can be used for production further affects the informatization process of downstream nesting and production processes. At present, the production of transformer cores, especially in the cross-cutting process, is usually manually calculated by operators according to the drawings, and then input into the machine to complete the production. This mode that relies on manual calculation and manual input has high requirements on the technical level of workers, and is only feasible when the product design is relatively simple. Human errors are difficult to avoid, which further affects production efficiency and product quality. Summary of the invention

[0004] In view of this, the present invention provides a stacked core structure design method, which can quickly convert core design drawings from different sources into standardized digital information, realize automatic generation of sheet size and regularization of geometric transformation, optimize the stacking method, and simultaneously combine material utilization parameters for precise design optimization, thereby solving the problems of high manual dependence, low efficiency, poor adaptability and material waste in traditional design methods, and providing support for the automation, digitization and intelligence of transformer production.

[0005] The technical purpose of the present invention is achieved in this way:

[0006] The present invention provides a stacked core structure design method, comprising the following steps:

[0007] S1. Build a design parameter library, with the main window as the core to input the basic design parameters of the core structure, including column section level definition data, number of joints, step length, number of single joint sheets, splicing method and lamination coefficient. The column section level definition data includes the width, thickness and window offset of the column at each level. The window center remains unchanged in each level of the window.

[0008] S2. Taking the center of the main-level window as a fixed reference, input the horizontal and vertical quantities of the main-level window, the width and height of the main-level window, and combine the column section level definition data to derive the width, height and center position of other level windows in turn;

[0009] S3. According to the size and position of each level of windows, combined with the column section level definition data and splicing method, the vertical column size and the horizontal column size are calculated, and the sheet shape and size range suitable for each level of window are generated. The sheet shape is generated through a predefined four-state conversion, including a reference state and its flipping or rotation mode;

[0010] S4. Make special adjustments to the sheet type and splicing structure according to local design requirements, and optimize the structure by adjusting the sheet shape and splicing method.

[0011] On the basis of the above technical solution, preferably, when there are holes and slots in the core structure, the method further includes the step of calculating hole and slot information of each level, which is specifically as follows:

[0012] Design the position and size of the hole slot, and determine the initial position, size range and geometric contour of the hole slot based on the center of the window;

[0013] For each level of film type, the specific coordinates of the hole slot position relative to the center of the film type are derived by calculating the offset of the window center reference;

[0014] Combining the generation logic of the sheet type and the four-state conversion law, the geometric characteristics and coordinate transformation of the hole and slot are synchronously derived and determined;

[0015] in:

[0016] The size range of the holes and slots meets the geometric restrictions of the sheet type and is consistent with the window shape and position superposition rules;

[0017] The hole information includes complete information of position, size and contour, and is calculated based on the specific characteristics of each level of film.

[0018] Based on the above technical solution, preferably, the calculation formula for the number of columns in the main window is:

[0019] C e =C wh +1

[0020] C s =C wv

[0021] C c =C wh -1

[0022] In the formula, C e is the number of yoke columns on one side; C s is the number of side columns on one side; C c is the number of central columns; C wh is the number of horizontal windows; C wv is the number of vertical windows.

[0023] On the basis of the above technical solution, preferably, the splicing methods include two types: corner splicing and column splicing;

[0024] The splicing attributes include the method, straight joint dominance, vertical column depth, horizontal column splicing, out-of-direction column splicing and step settings;

[0025] Among them, the methods include bevel joints and direct joints; straight joint dominance includes horizontal dominance and vertical dominance; the vertical column depth is defined by a numerical value; horizontal column splicing includes merging and non-merging; non-directional column splicing includes longitudinal stepping and transverse stepping; the step setting is set according to the longitudinal stepping and transverse stepping respectively, among which the longitudinal stepping includes visible steps and invisible steps, and the transverse stepping includes visible steps on the left side of the fish head and invisible steps on the left side of the fish head.

[0026] On the basis of the above technical solution, preferably, the calculation formulas for the width and height of each level of windows are as follows:

[0027]

[0028] Where ni represents the nth window of the i-th level; Indicates the width of window ni; n1 indicates the nth window of level 1, i.e. the nth window of the main level; Indicates the width of window n1; Indicates the left width of window n1; Indicates the left width of window ni; Indicates the right width of window n1; Indicates the right width of window ni; Indicates the height of window ni; Indicates the height of window n1; Indicates the top width of window n1; Indicates the top width of window ni; Indicates the window offset above window ni; Indicates the bottom width of window n1; Indicates the bottom width of window ni; Indicates the window offset below window ni.

[0029] On the basis of the above technical solution, preferably, the vertical column size and the horizontal column size are calculated according to the width, thickness and coordinate offset of the column center relative to the window center of the level in the column section level definition data at each level. The vertical column size calculation formula is as follows:

[0030]

[0031] Where nij represents the jth seam of the nth window at the i-th level; represents the vertical column length of the joint nij; is the vertical column width of window ni; is the vertical column depth of window ni; J i is the total number of seams in the i-th level window; Indicates the step size of the i-th level window;

[0032] The horizontal column size calculation formula is as follows:

[0033]

[0034] In the formula, represents the horizontal column length of the joint nij; is the horizontal column width of window ni; is the vertical column depth at the left end of window ni; is the right vertical column depth of window ni.

[0035] On the basis of the above technical solution, preferably, the sheet shapes include seven shapes, namely, isosceles trapezoid, fish head shape, hexagon, rectangle, right-angled trapezoid, right-angled pentagon and parallelogram;

[0036] Each chip type defines four states, namely 0 state, 1 state, 2 state and 3 state;

[0037] The logic of the four-state conversion is:

[0038] The 0 state is used as the reference state, which is the initial state of the sheet;

[0039] State 1 is obtained by horizontal flipping of the film relative to the reference state;

[0040] The 2-state is obtained by vertical flipping of the sheet shape relative to the reference state;

[0041] The 3-state is obtained by simultaneously flipping the film shape horizontally and vertically relative to the reference state;

[0042] The four states are used to adapt to the design requirements at the window level, and the reference state is used as the basis for annotation and geometric calculations.

[0043] Based on the above technical solution, preferably, the specialized processing includes the following three types:

[0044] Seam specialization: adjust the number of seams, step length, and number of single seam pieces for certain levels;

[0045] Specialization of patchwork: Adjust the shape and splicing method of the patch;

[0046] Structural specialization: local optimization and adjustment of window-level size and position.

[0047] On the basis of the above technical solution, preferably, the method further comprises calculating the effective cross-sectional area of ​​each level of column cross-section according to the column cross-section level definition data and the lamination coefficient to meet the design requirements. The calculation formula of the effective cross-sectional area is as follows:

[0048]

[0049] In the formula, A z is the effective cross-sectional area; K lf is the lamination coefficient; N is the number of cores; W i is the width of the i-th level; T i is the thickness of the i-th level; T v is the oil channel thickness.

[0050] On the basis of the above technical solution, preferably, the method further comprises the step of defining and setting the drawing annotation;

[0051] The annotation settings include the position, direction, collision area of ​​the annotation line, whether to clear the text background, whether to draw auxiliary lines, and the direction of the extension lines.

[0052] The method of the present invention has the following beneficial effects compared with the prior art:

[0053] (1) The present invention provides a stacked core structure design method, which realizes the systematization and efficiency of the core structure design by building a design parameter library, deriving the window size step by step, generating the sheet shape and splicing method, and making special adjustments. The method can quickly adapt to design drawings from different sources, automatically generate sheet size and splicing method, reduce manual intervention, improve design efficiency and accuracy, enhance the flexibility and adaptability of core structure design, and meet the diverse needs of complex core structures;

[0054] (2) By building a design parameter library, the basic parameters of the core structure design are clarified, including key design elements such as column section definition data, number of joints, step length, splicing method and lamination coefficient, which provides a unified design basis for subsequent window size derivation and sheet type generation. This technical means effectively solves the problem of parameter dispersion and lack of standardization in traditional design, ensuring the systematicness and consistency of the design process;

[0055] (3) The present invention uses the main window as a reference, combines the column section definition data, and derives the size and position of other windows step by step, ensuring that the center of the window remains unchanged in each window level. This method achieves accurate calculation of window size through a mathematical model, avoiding the complexity and error accumulation of multi-level window size adjustment in traditional design, thereby improving design accuracy and efficiency;

[0056] (4) The present invention realizes the flexible generation and adaptation of the sheet shape and size through the predefined four-state conversion logic (reference state and its flipping or rotation mode). This technical means can meet the design requirements of different window levels, improve the flexibility and adaptability of sheet geometry transformation, and use the reference state as the basis for annotation and calculation to ensure the standardization and accuracy of sheet design;

[0057] (5) In the case of holes and slots in the core structure, the present invention deduces the hole and slot positions based on the offset of the window center, and combines the sheet type generation logic and the four-state conversion rule to synchronously determine the geometric characteristics and coordinate transformation of the hole and slot. This method can accurately adapt to the sheet type geometric restrictions and window superposition rules, ensure the integrity and consistency of the hole and slot design, and meet the design requirements of complex core structures;

[0058] (6) The present invention provides three adjustment methods: joint specialization, piece specialization and structure specialization, which can optimize the piece shape, splicing method, window size and position according to local design requirements. This technical means enhances the flexibility and adaptability of the design scheme, can be optimized for specific design scenarios, and further improves the performance and adaptability of the core structure;

[0059] (7) The present invention ensures the clarity and standardization of the design drawings by defining and setting the position, direction, collision area, auxiliary lines and extension line directions of the annotation lines. This technical means can effectively reduce human annotation errors, improve the readability of design drawings and the accuracy of production guidance, and further optimize the efficiency of the connection between design and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 is a flow chart of a method according to an embodiment of the present invention;

[0062] Figure 2It is a technical implementation diagram of an embodiment of the present invention;

[0063] Figure 3 A schematic diagram of an effective cross-sectional area of ​​an embodiment of the present invention;

[0064] Figure 4 A schematic diagram of the bevel joint splicing of an embodiment of the present invention;

[0065] Figure 5 This is a schematic diagram of direct seam splicing according to an embodiment of the present invention;

[0066] Figure 6 A schematic diagram of a sheet type according to an embodiment of the present invention;

[0067] Figure 7 Schematic diagram of four states of each chip type in an embodiment of the present invention;

[0068] Figure 8 A schematic diagram of a four-state conversion logic according to an embodiment of the present invention;

[0069] Fig. 9 A schematic diagram of a sheet shape labeled according to an embodiment of the present invention;

[0070] Fig.10 A schematic diagram of a hole-slot structure according to an embodiment of the present invention;

[0071] Fig.11 Schematic diagram of hole and slot marking in an embodiment of the present invention. DETAILED DESCRIPTION

[0072] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] Definition of noun:

[0074] Window: An open area in the core structure that accommodates the transformer windings (coils). The size and location of the window directly affects the flux distribution and winding arrangement.

[0075] Yoke: The horizontal part of the core structure that connects the side or center legs and is mainly used to close the magnetic circuit and carry the magnetic flux. The yoke is usually located at the top and bottom of the core.

[0076] Side column: The vertical columns on both sides of the core structure are mainly used to carry magnetic flux and support windings. The size and position of the side column are closely related to the window design.

[0077] Center column: The vertical column located in the center of the core structure, usually carrying the main magnetic flux, is the core part of the core. The size of the center column directly affects the magnetic performance of the transformer.

[0078] Stacking: The process of stacking silicon steel sheets in a certain order and manner to form an iron core. The stacking method affects the magnetic properties, mechanical strength and material utilization of the iron core.

[0079] Stepping: The core sheets are staggered layer by layer during the stacking process to reduce magnetic flux leakage and mechanical stress.

[0080] Seam: The joint area between core sheets, used to connect core sheets of different sheet types or layers. The design of the seam affects the magnetic circuit continuity and mechanical stability of the core.

[0081] Step length: The distance between each layer of core sheets and the previous layer during the stepping process. The size of the step length directly affects the stacking method and magnetic properties of the core.

[0082] Cycle: A design pattern or regularity repeated in the stacking or splicing of laminations to achieve symmetry and uniformity of structure.

[0083] Level: The division of different window levels in core design. Each level of window has different sizes and positions, and the complete core structure is formed step by step.

[0084] High and low voltage side: The two sides of the winding in the transformer, the high voltage side refers to the side with higher voltage, and the low voltage side refers to the side with lower voltage. The core window needs to be adapted to both the high and low voltage windings.

[0085] Fish head: One of the special geometric shapes of core sheets, usually used in the transition area during splicing. Its shape is similar to a fish head, which can reduce magnetic flux leakage and optimize the splicing effect.

[0086] Corner cutting: The corner cutting of the core sheets to adapt to the geometric shape during the splicing or stacking process is used to reduce mechanical interference or optimize the magnetic circuit.

[0087] Oil channel: A channel used for cooling in the core structure, usually located between the core laminations or around the windings, used to conduct transformer oil to dissipate heat.

[0088] Hole: An opening in a core lamination used to secure or mount other components or to provide access for cooling oil passages.

[0089] Slot: A groove on the core sheet used to adapt the splicing or fixing structure, and may also be used to optimize the magnetic circuit or cooling design.

[0090] like Figure 1 As shown, the present invention provides a stacked core structure design method, comprising the following steps:

[0091] S1. Build a design parameter library, with the main window as the core to input the basic design parameters of the core structure, including column section level definition data, number of joints, step length, number of single joint sheets, splicing method and lamination coefficient. The column section level definition data includes the width, thickness and window offset of the column at each level. The window center remains unchanged in each level of the window.

[0092] S2. Taking the center of the main-level window as a fixed reference, input the horizontal and vertical quantities of the main-level window, the width and height of the main-level window, and combine the column section level definition data to derive the width, height and center position of other level windows in turn;

[0093] S3. According to the size and position of each level of windows, combined with the column section level definition data and splicing method, the vertical column size and the horizontal column size are calculated, and the sheet shape and size range suitable for each level of window are generated. The sheet shape is generated through a predefined four-state conversion, including a reference state and its flipping or rotation mode;

[0094] S4. Make special adjustments to the sheet type and splicing structure according to local design requirements, and optimize the structure by adjusting the sheet shape and splicing method.

[0095] Specifically, in one embodiment of the present invention, when there are holes and slots in the core structure, the step of calculating hole and slot information of each level is further included, which is as follows:

[0096] Design the position and size of the hole slot, and determine the initial position, size range and geometric contour of the hole slot based on the center of the window;

[0097] For each level of film type, the specific coordinates of the hole slot position relative to the center of the film type are derived by calculating the offset of the window center reference;

[0098] Combining the generation logic of the sheet type and the four-state conversion law, the geometric characteristics and coordinate transformation of the hole and slot are synchronously derived and determined;

[0099] in:

[0100] The size range of the holes and slots meets the geometric restrictions of the sheet type and is consistent with the window shape and position superposition rules;

[0101] The hole information includes complete information of position, size and contour, and is calculated based on the specific characteristics of each level of film.

[0102] The present invention uses highly abstract structural parameters to support structure construction with as few input parameters as possible, automatically calculates relevant dimensions, follows unified design standards, simplifies the digitization process of the core structure, and improves the speed and accuracy of the design. Based on the principle that the window center of the core structure remains unchanged, the present invention starts from the main level (first level) window: (1) By defining the main level size and each column cross section, the size and position of each level window are automatically calculated; (2) By defining the main level splicing method, combined with the windows of each level in the first step, the shape and size of each sheet type are automatically calculated; (3) By defining the coordinates of the hole slot relative to the window center, it is automatically converted into the hole slot position size of each sheet type; (4) When the "number of seams", "step length", "number of single seam pieces", "pieces", and "splicing method" of the level or seam are different from the main structure, a separate "specialization" definition is made to modify part of the structure.

[0103] See also Figure 2 , Figure 2 It is the flow relationship between data in the core structure design of the present invention, and the blue part is the content input from the outside. In a specific embodiment of the present invention, the design process of the stacked core structure is as follows:

[0104] 1. Build a design parameter library

[0105] The basic design parameters of the core structure are input with the main-level window as the core, including column section-level definition data, number of joints, step length, number of single-joint sheets, splicing method and stacking coefficient. The column section-level definition data includes the width, thickness and window offset of the column at each level.

[0106] Specifically, the number of seams refers to the number of seams in each level; the step size is the distance between the seams; the number of single-seam sheets is the number of sheets contained in each seam; and the lamination factor describes the stacking efficiency of the core material.

[0107] Basic design parameters are input by the user or extracted from external CAD drawings as the basis for subsequent calculations.

[0108] 2. Calculate the effective cross-sectional area of ​​the column section

[0109] The column section is the core parameter of the core structure design. It defines the width, thickness and window offset of each column, and calculates the effective cross-sectional area in combination with the lamination coefficient. Among them, the width and thickness of each column are provided by the design parameter library as the basis for the column section calculation. Window offset: defines the offset of the column center relative to the window center, which is used to determine the position of the column. Lamination coefficient: used to correct the effective cross-sectional area of ​​the column section. The calculation formula for the effective cross-sectional area is as follows:

[0110]

[0111] In the formula, A z is the effective cross-sectional area; Klf is the lamination coefficient; N is the number of cores; W i is the width of the i-th level; T i is the thickness of the i-th level; T v is the oil channel thickness.

[0112] In this embodiment, the effective cross-sectional area of ​​the column section refers to the actual magnetic flux passing area of ​​the core column, which is the effective area obtained after correction for the lamination factor and the oil channel thickness. Figure 3 shown.

[0113] 3. Main window calculation

[0114] The primary window is the starting point for core structure design and its definition includes:

[0115] Number of windows: usually single window structure. Window width and height: input by the user or extracted from CAD drawings. Distance from the center of the window to the four sides: used to determine the position and size of the column.

[0116] Taking the main level window as the benchmark, the window size is scaled step by step to generate the geometric parameters of other level windows. The window center remains unchanged throughout the design process, ensuring the consistency and simplicity of the design.

[0117] The columns are calculated by the horizontal and vertical numbers, width and height of the main window. The columns include upper yoke A, upper yoke B, lower yoke A, lower yoke B, left A, right A, middle column A, etc. The calculation formula for the number of columns in the main window is:

[0118] C e =C wh +1

[0119] C s =C wv

[0120] C c =C wh -1

[0121] In the formula, C e is the number of yoke columns on one side; C s is the number of side columns on one side; C c is the number of central columns; C wh is the number of horizontal windows; C wv is the number of vertical windows.

[0122] 4. Main level splicing

[0123] The splicing is an important part of the core structure, and its definition includes: splicing method, splicing priority, step setting, vertical column depth, etc. Specifically, the splicing method includes two types: corner splicing and column splicing;

[0124] The splicing attributes include the method, straight joint dominance, vertical column depth, horizontal column splicing, out-of-direction column splicing and step settings;

[0125] Among them, the methods include bevel joints and direct joints; straight joint dominance includes horizontal dominance and vertical dominance; the vertical column depth is defined by a numerical value; horizontal column splicing includes merging and non-merging; non-directional column splicing includes longitudinal stepping and transverse stepping; the step setting is set according to the longitudinal stepping and transverse stepping respectively, among which the longitudinal stepping includes visible steps and invisible steps, and the transverse stepping includes visible steps on the left side of the fish head and invisible steps on the left side of the fish head.

[0126] The specific attribute definitions of the splicing points are shown in Table 1.

[0127] Table 1 Definition of splicing attributes

[0128] type property value Corner stitching Way Bevel seams, straight seams Corner stitching Straight seam is dominant Horizontal dominance, vertical dominance Corner stitching Vertical column see steps See the stairs, don't see the stairs Corner stitching Vertical column depth (numeric value, 0 means the vertical column is aligned with the center of the horizontal column, >0 means the vertical column is lengthened) Column splicing Way Bevel seams, straight seams Column splicing Horizontal column splicing Merge or not merge Column splicing Different direction column splicing Vertical stepping, horizontal stepping Column splicing Vertical column see steps Vertical stepping: steps are visible, steps are not visible; horizontal stepping: steps are visible on the left side of the fish head, steps are not visible on the left side of the fish head Column splicing Vertical column depth (Numerical value, 0 means the V-stroke is defined by the vertical column width, >0 means the vertical column is lengthened)

[0129] Two examples are used to illustrate the properties of the joints. Example 1 is a bevel joint. The specific property settings are shown in Table 2. The schematic diagram of the splicing combined with the column is shown in Figure 4 Example 2 is a direct seam, and the specific attribute settings are shown in Table 3. The schematic diagram of splicing with columns is shown in Figure 5 shown. Figure 4 and Figure 5 The numbers in the middle indicate the joint numbers.

[0130] Table 2 Example 1

[0131] 1 Bevel joints, vertical columns with steps, vertical column depth 0 2 Bevel joints, horizontal columns not merged, columns with different directions stepping vertically, vertical columns with steps, vertical column depth 0 3 Bevel joints, vertical columns with steps, vertical column depth 0 4 Bevel joints, vertical columns without steps, vertical column depth 0 5 Bevel joints, horizontal column merging, longitudinal stepping of columns in different directions, no steps in vertical columns, vertical column depth 0 6 Bevel joints, vertical columns with steps, vertical column depth 0

[0132] Table 3 Example 2

[0133] 1 Direct seam and straight seam level are dominant 2 Direct seams, horizontal columns are not combined, and straight seams are vertically dominant 3 Direct seam and straight seam level are dominant 4 Direct seam and vertical seam are dominant 5 Direct seam, horizontal column merging 6 Direct seam and vertical seam are dominant

[0134] 5. Association calculation

[0135] The correlation calculation is a key step to combine the column section information with the window geometric parameters to generate the overall structure and sheet type. Specifically, it includes the calculation of window width and height: according to the main level window size and the stacking coefficient, the width and height of other levels of windows are generated step by step, as well as the vertical column size calculation and the horizontal column size calculation.

[0136] The calculation formulas for the width and height of windows at all levels are as follows:

[0137]

[0138] Where ni represents the nth window of the i-th level; Indicates the width of window ni; n1 indicates the nth window of level 1, i.e. the nth window of the main level; Indicates the width of window n1; Indicates the left width of window n1; Indicates the left width of window ni; Indicates the right width of window n1; Indicates the right width of window ni; Indicates the height of window ni; Indicates the height of window n1; Indicates the top width of window n1; Indicates the top width of window ni; Indicates the window offset above window ni; Indicates the bottom width of window n1; Indicates the bottom width of window ni; Indicates the window offset below window ni.

[0139] The vertical column size and horizontal column size are calculated based on the width, thickness and coordinate offset of the column center relative to the window center of the level in the column section level definition data at each level. The vertical column size calculation formula is as follows:

[0140]

[0141] Where nij represents the jth seam of the nth window at the i-th level; represents the vertical column length of the joint nij; is the vertical column width of window ni; is the vertical column depth of window ni; J i is the total number of seams in the i-th level window; Indicates the step size of the i-th level window;

[0142] The horizontal column size calculation formula is as follows:

[0143]

[0144] In the formula, represents the horizontal column length of the joint nij; is the horizontal column width of window ni; is the vertical column depth at the left end of window ni; is the right vertical column depth of window ni.

[0145] Through the associative calculation, a complete geometric model of the core structure can be generated.

[0146] 6. Film type conversion

[0147] The purpose of the sheet type transformation is to standardize the sheet geometry for ease of marking and production. The sheet types include isosceles trapezoid, fish head, hexagon, rectangle, right-angled trapezoid, right-angled pentagon and parallelogram, a total of seven shapes. The specific shape diagram is shown in the figure below. Figure 6 shown.

[0148] Each chip type defines four states, namely 0 state, 1 state, 2 state and 3 state. The four-state diagrams of the seven chip types are as follows: Figure 7 shown.

[0149] See also Figure 8 , the logic of the four-state conversion is:

[0150] The 0 state is used as the reference state, which is the initial state of the sheet;

[0151] State 1 is obtained by horizontal flipping of the film relative to the reference state;

[0152] The 2-state is obtained by vertical flipping of the sheet shape relative to the reference state;

[0153] The 3-state is obtained by simultaneously flipping the film shape horizontally and vertically relative to the reference state;

[0154] The four states are used to adapt to the design requirements at the window level, and the reference state is used as the basis for annotation and geometric calculations.

[0155] Specifically, in this embodiment, the annotation settings of the film type are shown in Table 4, which defines the code, encoding and specific description.

[0156] Table 4 Shape annotation

[0157]

[0158]

[0159] See also Fig. 9 ,This embodiment provides various shape annotation examples of isosceles trapezoid, hexagon, and parallelogram, corresponding to the codes in Table 4, to ensure annotation consistency and piece readability.

[0160] 7. Hole slot information

[0161] The hole and slot information describes the specific location and size of the holes, slots and V-punches on the sheet. The calculation of the hole and slot information is completed by the following steps:

[0162] Offset coordinates relative to the center of the window: The user enters the coordinates of the hole relative to the center of the window.

[0163] Convert to the sheet coordinate system: Convert the offset of the window center to the specific coordinates under the sheet (0 state).

[0164] In this embodiment, the dimensions of the hole and slot information are shown as follows: Fig.10 The specific code settings for hole, slot, and V-punch marking are shown in Table 5.

[0165] Table 5 Hole, slot and V-punch marking

[0166]

[0167]

[0168] See also Fig.11 This embodiment provides a schematic diagram of the marking of an isosceles trapezoidal lower V-punch, a round hole, an elliptical hole, a rectangular groove, and a semicircular rectangular groove, corresponding to the codes in Table 5, to ensure the consistency and readability of the marking.

[0169] 8. Annotation definition

[0170] In order to ensure the readability and accuracy of the sheet annotation and to prevent the problems of annotation overlap and auxiliary line confusion, the following definitions are made for drawing annotations:

[0171] Position: inside the shape, outside the shape;

[0172] Baseline: outside the marking line and on the marking line;

[0173] Direction: horizontal, vertical;

[0174] Collision area: full annotated area, annotated text only;

[0175] Whether to clear the text background;

[0176] Whether to start a single arrow, whether to end a single arrow;

[0177] Whether to draw the starting auxiliary line and whether to draw the ending auxiliary line;

[0178] Extension line direction: start, end.

[0179] These rules ensure the standardization and clarity of annotations and provide visual support for drawing output.

[0180] 9. Specialization

[0181] Specialization is the process of adjusting the core structure to meet the special needs of certain levels or joints. Specialization includes the following three types:

[0182] Specialization of seams: Adjustments are made to the number of seams, step lengths, and number of single seam pieces for certain levels; some levels are different from the levels of the main structure, and there are differences in the number of seams, step lengths, and number of single seam pieces, so some structures are modified.

[0183] Specialization of mosaics: Adjust the shape and splicing method of the pieces; some levels or joints may be limited by the upper limit of the width of the production equipment, or it may be necessary to increase the oil channel heat dissipation and divide the cylindrical pieces in width to form multiple mosaics. In this case, some structures need to be modified.

[0184] Structural specialization: local optimization and adjustment of the size and position of the window level; the splicing method of some levels or seams is different from that of the main structure, and part of the structure needs to be modified and the sheet shape, size, and hole position need to be recalculated.

[0185] Special processing is achieved by modifying basic parameters and re-substituting them into the calculation formula, which provides flexibility for the design of complex structures.

[0186] The core structure design of the present invention realizes fully automated design from parameter input to structure generation, sheet type marking and drawing output. Each stage is closely connected to ensure the efficiency, accuracy and flexibility of the design.

[0187] The advantages of the present invention include: the present invention does not limit the number of phases and columns, and is compatible with all conventional stacked core structures currently on the market. It can speed up the conversion of drawings to digital structures, and quickly provide downstream with any conventional to complex core structure data. Different enterprises that adopt the present invention can reduce communication costs based on unified design standards; downstream cross-cut production can no longer be calculated by workers based on drawings, but can use the structural data organized by the present invention. The present invention calculates itself based on parameters, and each size is calculated based on the complete structure divided into sheet types. There is no situation where the sheet size cannot build the structure, and the problem of incorrect drawing size is eliminated. The operation is convenient, and only a small number of parameters need to be entered for conventional structures, and complex structures are specially configured. The drawings are visualized, and any parameter adjustments for the structure, cross-section, and sheet type are displayed in real time.

[0188] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for designing a stacked core structure, characterized in that: The steps include: S1. Build a design parameter library, with the main window as the core to input the basic design parameters of the core structure, including column section level definition data, number of joints, step length, number of single joint sheets, splicing method and lamination coefficient. The column section level definition data includes the width, thickness and window offset of the column at each level. The window center remains unchanged in each level of the window. S2. Taking the center of the main-level window as a fixed reference, input the horizontal and vertical quantities of the main-level window, the width and height of the main-level window, and combine the column section level definition data to derive the width, height and center position of other level windows in turn; S3. According to the size and position of each level of windows, combined with the column section level definition data and splicing method, the vertical column size and the horizontal column size are calculated, and the sheet shape and size range suitable for each level of window are generated. The sheet shape is generated through a predefined four-state conversion, including a reference state and its flipping or rotation mode; S4. Make special adjustments to the sheet type and splicing structure according to local design requirements, and optimize the structure by adjusting the sheet shape and splicing method.

2. A stacked core structure design method as claimed in claim 1, characterized in that: When there are holes and slots in the core structure, the step of calculating hole and slot information at each level is also included, as follows: Design the position and size of the hole slot, and determine the initial position, size range and geometric contour of the hole slot based on the center of the window; For each level of film type, the specific coordinates of the hole slot position relative to the center of the film type are derived by calculating the offset of the window center reference; Combining the generation logic of the sheet type and the four-state conversion law, the geometric characteristics and coordinate transformation of the hole and slot are synchronously derived and determined; in: The size range of the holes and slots meets the geometric restrictions of the sheet type and is consistent with the window shape and position superposition rules; The hole information includes complete information of position, size and contour, and is calculated based on the specific characteristics of each level of film.

3. A stacked core structure design method as claimed in claim 2, characterized in that: The number of bars in the main level window is calculated using the formula: C e =C wh +1 C s =C wv C c =C wh -1 In the formula, C e is the number of yoke columns on one side; C s is the number of side columns on one side; C c is the number of central columns; C wh is the number of horizontal windows; C wv is the number of vertical windows.

4. A stacked core structure design method as claimed in claim 3, characterized in that: There are two types of splicing: corner splicing and column splicing; The splicing attributes include the method, straight joint dominance, vertical column depth, horizontal column splicing, out-of-direction column splicing and step settings; Among them, the methods include bevel joints and direct joints; straight joint dominance includes horizontal dominance and vertical dominance; the vertical column depth is defined by a numerical value; horizontal column splicing includes merging and non-merging; non-directional column splicing includes longitudinal stepping and transverse stepping; the step setting is set according to the longitudinal stepping and transverse stepping respectively, among which the longitudinal stepping includes visible steps and invisible steps, and the transverse stepping includes visible steps on the left side of the fish head and invisible steps on the left side of the fish head.

5. A stacked core structure design method as claimed in claim 4, characterized in that: The calculation formulas for the width and height of windows at all levels are as follows: Where ni represents the nth window of the i-th level; Indicates the width of window ni; n1 indicates the nth window of level 1, i.e. the nth window of the main level; Indicates the width of window n1; Indicates the left width of window n1; Indicates the left width of window ni; Indicates the right width of window n1; Indicates the right width of window ni; Indicates the height of window ni; Indicates the height of window n1; Indicates the top width of window n1; Indicates the top width of window ni; Indicates the window offset above window ni; Indicates the bottom width of window n1; Indicates the bottom width of window ni; Indicates the window offset below window ni.

6. A method for designing a laminated core structure as claimed in claim 5, characterized in that: The vertical column size and horizontal column size are calculated based on the width, thickness and coordinate offset of the column center relative to the window center of the level in the column section level definition data at each level. The vertical column size calculation formula is as follows: Where nij represents the jth seam of the nth window at the i-th level; represents the vertical column length of the joint nij; is the vertical column width of window ni; is the vertical column depth of window ni; J i is the total number of seams in the i-th level window; Indicates the step size of the i-th level window; The horizontal column size calculation formula is as follows: In the formula, represents the horizontal column length of the joint nij; is the horizontal column width of window ni; is the vertical column depth at the left end of window ni; is the right vertical column depth of window ni.

7. A method for designing a stacked core structure as claimed in claim 4, characterized in that: The shapes of the pieces include isosceles trapezoid, fish head, hexagon, rectangle, right-angled trapezoid, right-angled pentagon and parallelogram. Each chip type defines four states, namely 0 state, 1 state, 2 state and 3 state; The logic of the four-state conversion is: The 0 state is used as the reference state, which is the initial state of the sheet; State 1 is obtained by horizontal flipping of the film relative to the reference state; The 2-state is obtained by vertical flipping of the sheet shape relative to the reference state; The 3-state is obtained by simultaneously flipping the film shape horizontally and vertically relative to the reference state; The four states are used to adapt to the design requirements at the window level, and the reference state is used as the basis for annotation and geometric calculations.

8. A method for designing a laminated core structure as claimed in claim 7, characterized in that: There are three types of special processing: Seam specialization: adjust the number of seams, step length, and number of single seam pieces for certain levels; Specialization of patchwork: Adjust the shape and splicing method of the patch; Structural specialization: local optimization and adjustment of window-level size and position.

9. A stacked core structure design method as claimed in claim 1, characterized in that: The method further includes calculating the effective cross-sectional area of ​​each level of column cross-section according to the column cross-section level definition data and the lamination coefficient to meet the design requirements. The calculation formula of the effective cross-sectional area is as follows: In the formula, A z is the effective cross-sectional area; K lf is the lamination coefficient; N is the number of cores; W i is the width of the i-th level; T i is the thickness of the i-th level; T v is the oil channel thickness.

10. A stacked core structure design method as claimed in claim 1, characterized in that: The method also includes the step of defining and setting the drawing annotation; The annotation settings include the position, direction, collision area of ​​the annotation line, whether to clear the text background, whether to draw auxiliary lines, and the direction of the extension lines.

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