Rapid modeling method and system for double-layer fractional slot wave winding of hydroelectric generator

Abstract

The invention provides a rapid modeling method and system for a double-layer fractional slot wave winding of a hydroelectric generator, and relates to the technical field of virtual stator winding three-dimensional visualization. Comprising the following steps: establishing a stator winding basic part three-dimensional model; performing phase splitting on the winding according to the basic parameters of the winding; calculating a natural connection branch coil number array; generating an interelectrode connection array and an oblique connection array; automatically generating a winding connection sequence; and loading the three-phase part in the virtual space according to the connection sequence. According to the method, the double-layer fractional slot wave winding connection scheme meeting the engineering requirements can be efficiently and accurately generated, the overall structure and connection logic of the winding are clearly and visually presented, and the design and verification efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional visualization technology of virtual stator windings, and in particular to a rapid modeling method and system for double-layer fractional slot wave windings of hydroelectric generators. Background Technology

[0002] The design of stator winding connection schemes for large hydroelectric generators has long relied on manual labor. Technicians had to manually draw two-dimensional drawings based on the generator specifications to determine the winding connection relationships. However, as the scale of the units continues to expand, the stator winding structure becomes increasingly complex, with the number of bars reaching hundreds or even thousands. This not only greatly increases the difficulty of manual design and connection but also leads to low design efficiency and a high error rate.

[0003] Currently, large hydroelectric generators commonly employ three-phase, double-layer fractional-slot wave windings. Compared to lap windings, wave windings offer the advantage of reducing the number of connecting wires between coil groups; and compared to integer-slot windings, fractional-slot windings effectively suppress higher harmonics (especially tooth harmonics) in the no-load electromotive force, significantly improving the no-load back EMF waveform and reducing torque pulsation, thereby enhancing the overall electromagnetic performance and economy of the motor. However, the connection method for fractional-slot wave windings is not unique. If technicians choose inappropriate methods, it can easily lead to excessively long jumper wires or cross-interference. This not only wastes materials during manufacturing but also significantly increases the difficulty and complexity of on-site installation.

[0004] Furthermore, traditional manually designed two-dimensional winding connection drawings cannot intuitively and comprehensively display the complex three-dimensional structure of stator windings. Technicians cannot fully understand the spatial connection relationships between various components, posing significant challenges to design verification and on-site installation. Therefore, developing a technology that can automatically generate fractional slot wave winding connection schemes and present them in three-dimensional visualization in virtual space has crucial engineering application value for improving the design efficiency and verification reliability of large hydroelectric generators. Summary of the Invention

[0005] The main objective of this invention is to provide a rapid modeling method and system for double-layer fractional slot wave windings of hydroelectric generators, solving the technical problems of existing technologies such as reliance on manual labor, susceptibility to errors, low efficiency and accuracy, and insufficient adaptability.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a rapid modeling method for a double-layer fractional slot wave winding of a hydroelectric generator, comprising the following steps: S1: Obtain the basic parameters of the motor winding and establish a three-dimensional model of the basic components, wherein the basic components include wire bars and connectors; S2: The winding is phase-divided according to the basic parameters to generate a phase band array; S3: Calculate the natural connection branch coil number array based on the phase band array to determine the lead-out coil; S4: Generate interpolar connection arrays and skew connection arrays to optimize connection paths; S5: Automatically generate a winding connection sequence based on the connection array; S6: Load the basic components in the virtual space according to the winding connection sequence to form a three-phase winding model.

[0007] In a preferred embodiment, S1 includes: S11: Based on the component drawings in the basic parameters, a three-dimensional model of the basic component is established using modeling software. The basic component includes an upper layer wire rod, a lower layer wire rod, a parallel head sleeve, a slanted parallel head sleeve, an upper layer wire rod jumper wire, and a lower layer wire rod jumper wire. S12: Convert the 3D model to the specified file format and reset the coordinate system; S13: Import the converted 3D model into the virtual engine software and set it as a prefab, wherein the prefab is used for calling in the virtual space; The accuracy of the 3D model is verified according to the basic parameters to ensure matching with the motor windings. The verification includes checking the dimensions and connection compatibility of the basic components. If the verification passes, the prefab is stored; otherwise, the 3D model is adjusted and the conversion and import process is repeated.

[0008] In the preferred embodiment, S2 includes: S21: Calculate the number of slots per pole per phase q Write the calculation results as In the form of, q The calculation formula is: ; in, Z This refers to the number of stator slots; p For the number of pole pairs of the motor, m This represents the number of phases of the motor. S22: Based on the number of slots per pole per phase q The formula for calculating the winding cycle sequence is: ; in, Int ( x ) for taking x The integer part; S23: According to the winding cycle sequence, adjust the number of stator slots in a preset phase band order. Z The slots are grouped, wherein the preset phase band order is A, Z, B, X, C, Y, and six phase band arrays are generated. L 1j,in j =1, 2, ..., 6, and the phase band array L 1j This indicates the slot number assigned to each phase.

[0009] In a preferred embodiment, step S3 includes the following steps: S31: Obtain the array based on the phase band array. L 1 and L 2. If satisfied These two coils are naturally connected, where Y For pitch; otherwise, according to Y With 6 q The size relationship determines the lead-out coil, wherein if Y <6 q but L 1( I ) is the lead-out coil, if Y >6 q but L 1( I +1) is the lead-out coil, and is recorded in the array. Among them j From 1 to 6; S32: Based on the array Construct an array of coil numbers for natural connection branches L 4j ,in j =1, 2, ..., 6, as shown in the following formula: ; in, M for L 3. The number of array elements, the first m The line represents the first m A natural connecting branch; S33: According to L 3. Find the coil number of the natural connecting branch, and let... I =1, L 4( I ,1)= L 3( I ), calculate the following formula: ; like N L 2, then N If it is the coil number of the naturally connected branch, then... N Add to the L 4. Array corresponding rows and continue calculation. N ± Y The addition and subtraction signs are based on YWith 6 q The relationship is determined; if the calculation result is out of range, it is adjusted to a valid slot number, and the process is repeated until the condition is not met to complete the search for all coils of the natural connection branch, where the last coil is the lower layer lead-out coil, and then incremented. I Until more than M .

[0010] In a preferred embodiment, step S4 includes the following steps: S41: For wires of the same phase but different polarities, an inter-pole connecting wire is used to connect them, wherein the inter-pole connecting wire is selected to be the path with the shortest distance between the two lead coils connected to each other; S42: Determine whether the natural connection branch forms a closed loop after the inter-pole connection is made. If it does, disconnect the specific connection point and introduce a slanted connection; set the branch coil number array. L The coil number of the lead-out terminal of a natural connection branch of 4 is x Wherein the specific connection point is the lead-out coil number of the natural connection branch ( x +1) and ( x +1± Y The connection of ) and the addition and subtraction signs according to Y With 6 q The relationship is established; x and( x +1± Y ) perform the oblique connection, and ( x +1) Modify to a new lead coil; connect the modified lead coil to the nearest other lead coil to optimize the connection path.

[0011] In a preferred embodiment, step S5 includes the following steps: S51: Initialize data i =1, according to Calculate e ;in e Used to determine the starting layer of the winding; S52: If i a Proceed to the next step; where a Preset the number of parallel branches; S53: Determine if e >0, then set L =1, start winding from the upper coil of phase X; otherwise, set to let L =0, start winding from the lower coil of phase X; S54: Determine whether the interpolar connection condition is met; if so, execute S55; otherwise, execute S56. S55: If the slant join condition is not met, perform a natural join and then return; otherwise, perform the slant join and return. S56: If the interpolar connection condition is satisfied and if L If =1, then the inter-electrode connection is made from the lower layer lead-out end and set. L =0; otherwise, perform the inter-electrode connection from the upper-layer lead-out end and set the command. L =1; S57: Order i = i +1, execute S52, repeat the above judgment until... i Greater than a The connection types are distinguished by specific values, with the upper layer bar jumper wires marked as positive specific numbers, the lower layer bar jumper wires marked as negative specific numbers, and the diagonal joints marked as another specific number, to form the winding connection sequence.

[0012] In a preferred embodiment, step 6 includes the following steps: S61: Calculate the position of each parallel head according to the winding connection sequence, wherein the position is the average of the absolute values ​​of the serial numbers of two natural connecting rods, and determine the upper or lower parallel head according to the positive or negative value and insert it into the connection sequence to obtain a complete component sequence; S62: Determine the type of individual data in the complete component sequence and load it in the virtual space; S63: According to the judgment and loading process, single-phase components and three-phase components are loaded sequentially in the virtual space, wherein the loading includes calculating the slot pitch crossed by the jumper wire to generate the corresponding model, and verifying the overall structure of the three-phase winding model to ensure the accuracy of no crossover and dynamic display.

[0013] In the preferred embodiment, S61 includes the following steps: Step 611: Let the serial numbers of the two natural connecting rods be respectively... x , y Then the virtual position parameters of the headgear are ; Step 612: Record the upper layer parallel head as positive and the lower layer parallel head as negative, and write the result between the two natural connecting rods.

[0014] In the preferred embodiment, S62 includes the following steps: If it is a bar, then load the upper or lower bar according to the positive or negative value; If it is not a bar, then determine whether it is a parallel head sleeve; If it is a parallel head sleeve, then load either an angled parallel head sleeve or a regular parallel head sleeve according to a specific value; If it is not the aforementioned parallel head sleeve, then load the upper layer bar jumper or the lower layer bar jumper according to the specific value.

[0015] Secondly, a rapid modeling system for a double-layer fractional slot wave winding of a hydroelectric generator is provided, applicable to the aforementioned rapid modeling method for a double-layer fractional slot wave winding of a hydroelectric generator, including: The 3D model module is used to obtain the basic parameters of the motor winding and to establish 3D models of the basic components, including wire bars and connectors. The winding grouping module is used to divide the winding into phases according to the basic parameters to generate a phase band array; The natural connection branch module is used to calculate the natural connection branch coil number array based on the phase band array to determine the lead-out coil; The connection array generation module is used to generate inter-pole connection arrays and slant connection arrays to optimize connection paths; A connection sequence generation module is used to automatically generate a winding connection sequence based on the connection array; A 3D visualization module is used to load the basic components in virtual space according to the winding connection sequence to form a three-phase winding model.

[0016] This invention provides a rapid modeling method for double-layer fractional slot wave windings of hydroelectric generators, including: establishing a three-dimensional model of the basic components of the stator winding; dividing the winding into phases according to the basic parameters of the winding; automatically designing the connection scheme of the fractional slot wave winding of a large hydroelectric generator based on the basic parameters of the stator winding, and converting the complex connection logic into a clear two-dimensional array, which greatly shortens the working time and improves the working efficiency and accuracy of the scheme; calculating the coil number array of the natural connection branch; generating the inter-pole connection array and the oblique connection array, realizing the efficient and accurate generation of double-layer fractional slot wave winding connection schemes that meet engineering requirements, and clearly and intuitively presenting the overall structure and connection logic of the winding; this invention automatically generates the winding connection sequence, loads the three-phase components in the virtual space according to the connection sequence, and selects the shortest path jumper wire, fundamentally solving the two major problems of excessively long jumper wires and crossover connection wires commonly found in traditional designs, reducing the material cost required to manufacture jumper wires, and reducing the difficulty and risk of on-site installation, significantly improving the design and verification efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a flowchart illustrating the automatic generation of the double-layer fractional slot wave winding of the present invention. Figure 2 This is a three-dimensional model of the basic components of the stator winding of the present invention; Figure 3 This is a flowchart illustrating the calculation of the double-layer fractional slot wave winding connection sequence according to the present invention; Figure 4 For the present invention and Methods for calculating arrays; Figure 5 For the present invention and Methods for calculating arrays; Figure 6 This is the fractional slot wave winding connection sequence of the present invention; Figure 7 This is the connection sequence of the three-phase components of the present invention; Figure 8 This is the grid diagram of the fractional slot wave winding of the present invention; Figure 9 This is an unfolded diagram of the stator winding of the present invention; Figure 10 This is the loading process for a single component of the stator winding in this invention; Figure 11 This describes the loading process of the three-phase components of the stator winding in this invention. Detailed Implementation

[0018] Example 1 like Figure 1-11 As shown, a rapid modeling method for a double-layer fractional slot wave winding of a hydroelectric generator includes the following steps: S1: Obtain the basic parameters of the motor windings and establish a three-dimensional model of the basic components, including the wire rods and connectors.

[0019] S2: The winding is split into phases according to the basic parameters to generate a phase band array.

[0020] S3: Calculate the coil number array of the natural connection branch based on the phase band array to determine the lead coil.

[0021] S4: Generate interpolar connection arrays and slant connection arrays to optimize connection paths.

[0022] S5: Automatically generate the winding connection sequence based on the connection array.

[0023] S6: Load basic components in the virtual space according to the connection sequence to form a three-phase winding model.

[0024] In this embodiment, by identifying the basic parameters of the stator winding, the connection sequence of the winding components is automatically calculated, and the stator winding connection scheme is dynamically loaded and displayed from multiple angles in the three-dimensional visualization application engine platform. This achieves fully automatic design of the connection scheme of the fractional slot wave winding of a large hydroelectric generator, and transforms the complex connection logic into a clear two-dimensional array, improving design efficiency and scheme accuracy. It efficiently and accurately generates winding connection schemes that meet engineering requirements, reduces the material cost required for manufacturing jumpers, and the generated schemes are more regular, greatly reducing the difficulty and risk of on-site installation. Furthermore, it clearly and intuitively presents the overall structure and connection logic of the winding in virtual space.

[0025] In the preferred embodiment, step S1 establishes a three-dimensional model of the winding components, such as... Figure 1 As shown, it includes: S11: Based on the drawings of the stator winding components, a three-dimensional model is created using SolidWorks software, including the upper layer bar, lower layer bar, parallel head sleeve, oblique parallel head sleeve, upper layer bar jumper wire, and lower layer bar jumper wire.

[0026] S12: Convert the 3D model of the parts created using 3ds Max software into an .fbx file and reset the coordinate system.

[0027] S13: Import the processed model into Unity3D software and set it as a prefab. The prefab is used for calling in virtual space.

[0028] This embodiment verifies the accuracy of the 3D model by sampling basic parameters to ensure matching with the motor windings. The verification includes checking the dimensions and connection compatibility of the basic components. If the verification passes, the prefab is stored; otherwise, the 3D model is adjusted and the conversion and import process is repeated.

[0029] In the preferred embodiment, step S2 involves phase separation of the winding based on its basic parameters, including: S21: Calculate the number of slots per pole per phase q Write the calculation results as In the form of, q The calculation formula is: ; in, Z This refers to the number of stator slots; p For the number of pole pairs of the motor, m This represents the number of phases of the motor.

[0030] S22: Based on the number of slots per pole per phase q The formula for calculating the winding cycle sequence is: ; in, Int (x ) for taking x The integer part.

[0031] S23: Based on the calculated cycle number, arrange the following in the order of A, Z, B, X, C, Y. Z The slots are grouped, with the first group (phase A) occupying [a certain percentage]. k 1 slot, ..., the d Group k d Each slot. Repeat the above steps until... Z All slots have been allocated. There are a total of 6 phase band arrays, denoted as... ( j =1, 2, ..., 6), representing the slot numbers assigned to the 6 phase bands. The leads of the natural connection branches can only be on the first coil of each phase band. These numbers are recorded in... L 2j In the array ( j =1, 2, ..., 6). Calculate L 1j and L 2j Array methods, such as Figure 4 As shown.

[0032] There are two cycles in the above process. The first cycle goes through... d The number of cycles is 1, which is called 1 cycle. d The first type is a cycle; the second type involves completing one cycle after six phase bands, called a phase band cycle. The judgment of the first... I Second-rate d The first in the loop J The method to determine which phase the number belongs to: If I J and S satisfy the following formula: .

[0033] The S-value corresponding to each phase zone in Table 1 can then be used to determine which phase zone it belongs to. For example, S When =5, if I and J If the above equation holds, then the first... I Second-rate d The first loop J The number belongs to phase A.

[0034] Table 1. Corresponding to each phase band S Value

[0035] This embodiment repeats the grouping until all slots are allocated, and then starts from the phase array. Extract the first coil of each phase band as the lead-out of the natural connection branch to form an array. According to the phase band array and array Verify the integrity of the grouping, which includes checking the uniqueness of the slot number and the number of stator slots covered. Z .

[0036] In the preferred embodiment, step S3, calculating the array of coil numbers for natural connecting branches, includes the following steps: S31: Obtain the array based on the phase array of S2. and If satisfied These two coils are naturally connected, where Y For pitch; if not satisfied, according to Y With 6 q The size relationship determines the lead-out coil: like but This is the lead-out coil.

[0037] like but For the lead-out coil, record it in the array. L 3j middle, j =1, 2, ..., 6.

[0038] S32: Record the array of coil numbers for the natural connecting branches as follows L 4j ( j =1, 2, ..., 6), as shown in the following formula: ; in, M for L 3. The number of array elements, the first m The line represents the first m A natural connecting branch.

[0039] S33: According to L 3. Find the coil number of the natural connecting branch, and let... I =1, L 4( I ,1)= L 3( I ), calculate the following formula: .

[0040] like N L 2, then N It is the coil number of the natural connecting branch, written in array number I After the row element, merge and continue the calculation. The addition and subtraction signs are based on Y With 6 q Relationship established: Take the right time. Take the negative value; then judge. N ± Y Is it? The element, when the condition is not met, indicates... N ± Y This is not the coil number of a naturally connected branch. All coils in this naturally connected branch have been located, and the last coil is the lower-level lead-out coil of this branch. Then, let... I = I +1, repeat the above steps until... I > M The event will end at that time.

[0041] Let the calculation result in the above process be x ,like x > Z Then you need to use x - Z Substitute; if x If <0, then it is necessary to use x + Z Replace. Calculate L 3j and L 4j Array methods, such as Figure 5 As shown.

[0042] In the preferred embodiment, step S4 generates the interpolar connection array and the skew connection array, including the following steps: S41: For wires of the same phase but different polarities, use inter-pole connecting wires (i.e., jumper wires) to connect them. The inter-pole connecting wires are selected based on the path that is closest to the two lead coils that are connected to each other, so that the inter-pole connecting wires are the shortest possible.

[0043] S42: If the naturally connected branches form a closed loop with each other, then execute S43; otherwise, end.

[0044] S43: Let L The coil number of the lead-out terminal of a natural connection branch of 4 is x .like Then disconnect ( x +1) and ( x +1- Y The natural connection of ) will x and( x +1- Y ) Slant connection; otherwise disconnect. x +1) and ( x +1+ Y The natural connection of ) willx and( x +1+ Y ) Oblique connection.

[0045] S44:( x +1) is changed to the lead-out coil, and ( x +1) and the nearest lead coil are connected between poles.

[0046] This embodiment verifies the integrity of the inter-pole connection array and the slant connection array. The verification includes checking for no intersections and the shortest connection path. If these conditions are not met, the slant connections are adjusted and the judgment and connection process is repeated.

[0047] In the preferred embodiment, step S5 automatically generates the winding connection sequence, including the following steps: S51: Initialize data i =1, according to Calculate ;in Used to determine the starting layer of the winding.

[0048] S52: If i a Proceed to the next step; where a The number of parallel branches is preset.

[0049] S53: Determine if e >0, then set L =1, start winding from the upper coil of phase X; otherwise, set to let L =0, start winding from the lower coil of phase X.

[0050] S54: Determine whether the interpolar connection condition is met, then execute S54; otherwise, execute S56.

[0051] S55: If the skew join condition is not met, perform a natural join and then return; otherwise, perform a skew join and return to S54.

[0052] S56: If the interpolar connection condition is satisfied and if L =1, then an inter-electrode connection is made from the lower-level lead-out terminal and set. L =0; if not satisfied, then perform inter-pole connection from the upper-level lead-out terminal and set the command. L =1.

[0053] S57: Order i = i +1, execute S52, repeat the judgment until... i > aSpecific values ​​are used to distinguish the connection types, with the upper layer bar jumper wires marked as positive specific numbers, the lower layer bar jumper wires marked as negative specific numbers, and the slanted parallel head loops marked as another specific number, in order to form a winding connection sequence.

[0054] In this embodiment, to distinguish between the slanted connector, jumper wire, and bar data, the upper bar jumper wire is denoted as 10000, the lower bar jumper wire as -10000, and the slanted connector as 6666.

[0055] like Figure 3 The diagram shown is a flowchart for calculating the connection sequence of a double-layer fractional slot wave winding. Z =288,2 p =30, Y 1 = 8 Y 2 = 11 a Taking a large hydroelectric generator fractional slot wave winding with a value of 1 as an example, according to the winding connection sequence (bar connection) obtained in S5, as follows: Figure 6 As shown.

[0056] like Figure 7 The diagram shows a complete sequence of components including wire rods, parallel connectors, angled parallel connectors, and jumper wires.

[0057] like Figure 8 The grid diagram shown only displays the slot number of the upper coil bar. Therefore, the slot number of each small square represents the upper coil edge and the lower coil edge connected to it.

[0058] In the preferred embodiment, step 6, loading the three-phase components in the virtual space according to the connection sequence, includes the following steps: S61: Calculate the position of each parallel head sleeve based on the winding connection sequence obtained in S5.

[0059] S62: Determine the type of a single data item in the complete component sequence and load it in the virtual space.

[0060] S63: Load single-phase components and three-phase components sequentially in the virtual space. Loading includes calculating the slot pitch spanned by the jumper wire to generate the corresponding model, and verifying the overall structure of the three-phase winding model to ensure the accuracy of the crossover and dynamic display.

[0061] In the preferred embodiment, step S61 includes the following steps: Step 611: Let the serial numbers of the two natural connecting rods be respectively... x , y Then the virtual position parameters of the headgear are .

[0062] Step 612: Record the upper layer parallel head as positive and the lower layer parallel head as negative, and write the result between the two natural connecting rods.

[0063] In the preferred embodiment, step S62 includes the following steps: S621: Determine if the data is a bar. If yes, proceed to step S622; otherwise, proceed to step S623.

[0064] S622: If the data is positive, load the upper layer bar; otherwise, load the lower layer bar.

[0065] S623: Determine if the data is a parallel head set. If yes, proceed to step S624; otherwise, proceed to step S625.

[0066] S624: If the data is 6666, then load the slanted head cover; otherwise, load the parallel head cover.

[0067] S625: If the data is 10000, load the upper layer jumper wire; otherwise, load the lower layer jumper wire.

[0068] like Figure 9 As shown in the stator winding unfolded diagram of the solution, it can be seen that there are no intersections between the connecting lines, indicating that the method proposed in this embodiment can accurately generate a connection scheme that meets the actual design requirements.

[0069] This embodiment uses a 3D engine such as Unity3D to automatically and dynamically generate a fully parameterized model of the stator winding, clearly and intuitively presenting the overall 3D structure and internal connection logic of the winding. This 3D model supports comprehensive, multi-angle observation and interaction. First, load individual parts, as described in the following method... Figure 10 As shown, the loading process of the three-phase components is as follows: Figure 11 As shown, yellow, green, and red represent phases U, V, and W, respectively. It's important to note that in fractional-slot windings, the presence of slanted jumper heads can cause differences in the number of slots crossed by the jumper wires. Therefore, it's necessary to calculate the slot pitch between the two bars connected by the jumper wires and then generate the corresponding jumper wires.

[0070] The automated solution method successfully generated accurate winding connection sequences that closely matched actual field data, demonstrating its strong adaptability and broad application potential. During the experiments, automated calculations typically completed within seconds, significantly shorter than traditional manual design. The computer-aided design method greatly improves design efficiency and effectively avoids errors. Therefore, this embodiment offers significant advantages, particularly suitable for the design of complex motors such as large hydroelectric generators.

[0071] This embodiment can automatically design the connection scheme of the fractional slot wave winding of a large hydroelectric generator based on the basic parameters of the stator winding, and convert the scheme into a two-dimensional array, which can clearly represent the connection relationship of the winding components. When designing the fractional slot wave winding connection scheme, the shortest jumper wire is automatically selected, which effectively solves the problem of excessively long jumper wires or crossovers, and can efficiently and accurately generate a winding connection scheme that meets the engineering requirements. Based on the calculated winding connection sequence, the components of the stator winding are automatically generated, which intuitively presents the overall structure and connection logic of the winding, and realizes a comprehensive and multi-angle understanding of the overall stator winding structure.

[0072] Example 2 Further illustrating with reference to Embodiment 1, a rapid modeling system for a double-layer fractional slot wave winding of a hydroelectric generator is applicable to the rapid modeling method for a double-layer fractional slot wave winding of a hydroelectric generator described in Embodiment 1, comprising: The 3D model module is used to obtain the basic parameters of the motor windings and to build 3D models of the basic components, including the coil bars and connectors.

[0073] The winding grouping module is used to divide the windings into phases based on basic parameters to generate a phase band array.

[0074] The natural connection branch module is used to calculate the natural connection branch coil number array based on the phase band array to determine the lead-out coil.

[0075] The join array generation module is used to generate inter-pole join arrays and slant join arrays to optimize join paths.

[0076] The connection sequence generation module is used to automatically generate the connection sequence of the windings based on the connection array.

[0077] The 3D visualization module is used to load basic components in virtual space according to the connection sequence to form a three-phase winding model.

[0078] This embodiment provides a method for rapid modeling of double-layer fractional slot wave windings of a hydroelectric generator, including its working process, details, and technical effects. Please refer to Embodiment 1 for further details.

[0079] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A rapid modeling method for a double-layer fractional slot wave winding of a hydroelectric generator, characterized in that, Includes the following steps: S1: Obtain the basic parameters of the motor winding and establish a three-dimensional model of the basic components, wherein the basic components include wire bars and connectors; S2: The winding is phase-divided according to the basic parameters to generate a phase band array; S3: Calculate the natural connection branch coil number array based on the phase band array to determine the lead-out coil; S4: Generate interpolar connection arrays and skew connection arrays to optimize connection paths; S5: Automatically generate a winding connection sequence based on the connection array; S6: Load the basic components in the virtual space according to the winding connection sequence to form a three-phase winding model.

2. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 1, characterized in that, S1 includes: S11: Based on the component drawings in the basic parameters, a three-dimensional model of the basic component is established using modeling software. The basic component includes an upper layer wire rod, a lower layer wire rod, a parallel head sleeve, a slanted parallel head sleeve, an upper layer wire rod jumper wire, and a lower layer wire rod jumper wire. S12: Convert the 3D model to the specified file format and reset the coordinate system; S13: Import the converted 3D model into the virtual engine software and set it as a prefab, wherein the prefab is used for calling in the virtual space.

3. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 1, characterized in that, The S2 includes: S21: Calculate the number of slots q per pole per phase, and write the calculation result as follows: In the form of, q The calculation formula is: ； in, Z This refers to the number of stator slots; p For the number of pole pairs of the motor, m This represents the number of phases of the motor. S22: Based on the number of slots per pole per phase q The formula for calculating the winding cycle sequence is: ； in, Int ( x ) for taking x The integer part; S23: According to the winding cycle sequence, adjust the number of stator slots in a preset phase band order. Z The slots are grouped, wherein the preset phase band order is A, Z, B, X, C, Y, and six phase band arrays are generated. ,in j =1, 2, ..., 6, and the phase band array L 1j This indicates the slot number assigned to each phase.

4. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 1, characterized in that, S3 includes the following steps: S31: Obtain the array based on the phase band array. L 1 and L 2. If satisfied These two coils are naturally connected, where Y For pitch; otherwise, according to Y With 6 q The size relationship determines the lead-out coil, wherein if Y <6 q but L 1( I ) is the lead-out coil, if Y >6 q but L 1( I +1) is the lead-out coil, and is recorded in the array. Among them j From 1 to 6; S32: Based on the array Construct an array of coil numbers for natural connection branches L 4j ,in j =1, 2, ..., 6, as shown in the following formula: ； in, M for L 3. The number of array elements, the first m The line represents the first m A natural connecting branch; S33: According to L 3. Find the coil number of the natural connecting branch, and let... I =1, L 4( I ,1)= L 3( I ), calculate the following formula: ； like N L 2, then N If it is the coil number of the naturally connected branch, then... N Add to the L 4. Array corresponding rows and continue calculation. N ± Y The addition and subtraction signs are based on Y With 6 q The relationship is determined; if the calculation result is out of range, it is adjusted to a valid slot number, and the process is repeated until the condition is not met to complete the search for all coils of the natural connection branch, where the last coil is the lower layer lead-out coil, and then incremented. I Until more than M .

5. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 1, characterized in that, S4 includes the following steps: S41: For wires of the same phase but different polarities, an inter-pole connecting wire is used to connect them, wherein the inter-pole connecting wire is selected to be the path with the shortest distance between the two lead coils connected to each other; S42: Determine whether the natural connection branch forms a closed loop after the inter-pole connection is made. If it does, disconnect the specific connection point and introduce a slanted connection; set the branch coil number array. L The coil number of the lead-out terminal of a natural connection branch of 4 is x Wherein the specific connection point is the lead-out coil number of the natural connection branch ( x +1) and ( x +1± Y The connection of ) and the addition and subtraction signs according to Y With 6 q The relationship is established; x and( x +1± Y ) perform the oblique connection, and ( x +1) Modify to a new lead coil; connect the modified lead coil to the nearest other lead coil to optimize the connection path.

6. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 1, characterized in that, S5 includes the following steps: S51: Initialize data i =1, according to Calculate e ;in e Used to determine the starting layer of the winding; S52: If i a Proceed to the next step; where a Preset the number of parallel branches; S53: Determine if e >0, then set L =1, start winding from the upper coil of phase X; otherwise, set to let L =0, start winding from the lower coil of phase X; S54: Determine whether the interpolar connection condition is met; if so, execute S55; otherwise, execute S56. S55: If the slant join condition is not met, perform a natural join and then return; otherwise, perform the slant join and return. S56: If the interpolar connection condition is satisfied and if L If =1, then the inter-electrode connection is made from the lower layer lead-out end and set. L =0; otherwise, perform the inter-electrode connection from the upper-layer lead-out end and set the command. L =1; S57: Order i = i +1, execute S52, repeat the above judgment until... i Greater than a The connection types are distinguished by specific values, with the upper layer bar jumper wires marked as positive specific numbers, the lower layer bar jumper wires marked as negative specific numbers, and the diagonal joints marked as another specific number, to form the winding connection sequence.

7. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 1, characterized in that, Step 6 includes the following steps: S61: Calculate the position of each parallel head according to the winding connection sequence, wherein the position is the average of the absolute values ​​of the serial numbers of two natural connecting rods, and determine the upper or lower parallel head according to the positive or negative value and insert it into the connection sequence to obtain a complete component sequence; S62: Determine the type of individual data in the complete component sequence and load it into the virtual space; S63: According to the judgment and loading process, single-phase components and three-phase components are loaded sequentially in the virtual space, wherein the loading includes calculating the slot pitch crossed by the jumper wire to generate the corresponding model, and verifying the overall structure of the three-phase winding model to ensure the accuracy of no crossover and dynamic display.

8. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 7, characterized in that, S61 includes the following steps: Step 611: Let the serial numbers of the two natural connecting rods be respectively... x , y Then the virtual position parameters of the headgear are ; Step 612: Record the upper layer parallel head as positive and the lower layer parallel head as negative, and write the result between the two natural connecting rods.

9. The rapid modeling method for double-layer fractional slot wave windings of a hydroelectric generator according to claim 7, characterized in that, S62 includes the following steps: If it is a bar, then load the upper or lower bar according to the positive or negative value; If it is not a bar, then determine whether it is a parallel head sleeve; If it is a parallel head sleeve, then load either an angled parallel head sleeve or a regular parallel head sleeve according to a specific value; If it is not the aforementioned parallel head sleeve, then load the upper layer bar jumper or the lower layer bar jumper according to the specific value.

10. A rapid modeling system for a double-layer fractional slot wave winding of a hydroelectric generator, characterized in that, A rapid modeling method for a double-layer fractional slot wave winding of a hydroelectric generator, applicable to any one of claims 1-9, includes: The 3D model module is used to obtain the basic parameters of the motor winding and to establish 3D models of the basic components, including wire bars and connectors. The winding grouping module is used to divide the winding into phases according to the basic parameters to generate a phase band array; The natural connection branch module is used to calculate the natural connection branch coil number array based on the phase band array to determine the lead-out coil; The connection array generation module is used to generate inter-pole connection arrays and slant connection arrays to optimize connection paths; A connection sequence generation module is used to automatically generate a winding connection sequence based on the connection array; A 3D visualization module is used to load the basic components in virtual space according to the winding connection sequence to form a three-phase winding model.

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