Motor flat wire stator all-parameter model establishment method and system

Abstract

The invention provides a motor flat wire stator full-parameter model building method and system, and belongs to the technical field of model building for motor design and development, and the method comprises the steps: building a fan-shaped ring region which is a 0 # region: taking the origin of coordinates as the circle center of the fan-shaped ring region, then enabling a y axis to be located at the symmetric center of a tooth part, and enabling the outer diameter of a fan-shaped ring to be the stator outer diameter RS1, the inner diameter of the fan-shaped ring is the inner diameter RR1 of the stator, the angle of the fan-shaped ring is 360 / poles, and the poles are the number of poles of the motor; a mechanical angle area with a half tooth groove is established based on the fan-shaped ring area and is a first area, the first area is a part of the fan-shaped ring area, and the outer diameter and the inner diameter of the first area are consistent with those of the fan-shaped ring area; establishing a full-parameter model of the half tooth socket based on the mechanical angle area of the half tooth socket; performing mirror image on the full-parameter model of the half tooth socket to establish all tooth socket structures; and establishing a full-parameter model on the basis of all tooth groove structures.

Description

Technical Field

[0001] The present invention belongs to the technical field of model establishment for motor design and development, and in particular relates to a method and system for establishing a full-parameter model of a motor flat wire stator. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] During the development process of motor products, there are many variables and objective functions of the motor. Therefore, it is necessary to carry out multi-objective optimization design of the motor during the motor development process. A complete motor full-parameter model is needed, which is of great benefit to improving the motor optimization efficiency and optimization degree.

[0004] All parameters are a description of the motor parametric model, which means that all size constraints of the motor can be made into variables, so that the size of the motor can be changed very conveniently without remodeling.

[0005] The main parameters that can be parameterized are: stator outer diameter, stator inner diameter, air gap width, slot number, pole number, slot width, slot depth, slot opening, slot shoulder height, flat wire width, flat wire height, insulating paper thickness, process gap, rotor outer edge air slot depth, rotor air slot angle, rotor air slot radius, magnet width, magnet angle, magnet pole arc coefficient, magnet spacing, magnet thickness, main magnetic bridge width, main magnetic bridge length, auxiliary magnetic bridge width, auxiliary magnetic bridge length, etc. These variables can be parameterized to control the changes of these variables in the form of parameters.

[0006] The parametric model is also the core of multi-objective optimization of motors. A motor solution is usually the best result selected after calculating 5,000-10,000 motor solutions. Only by relying on the full parameter model can the software calculate these solutions without manual intervention. If it is a non-full parameter model, every time a parameter is changed, manual operation is required to build the model and calculate it once, which requires thousands of manual operations, and the efficiency is unacceptable.

[0007] Currently, the factors that affect the motor stator include the number of slots, slot-related dimensions, insulation paper and process gaps, as well as the maturity of the flat wire, the rounded corners of the flat wire, etc. Accurately establishing a model for the flat wire is of great help in accurately calculating the AC copper loss.

[0008] The existing technology focuses on the finite element simulation or equivalent simulation modeling methods of motors, specifically simulation modeling methods other than standard commercial finite element simulation. The models in the existing technology can only calculate the simulation results of the motor with the current parameters. If the parameters need to be changed, the model needs to be rebuilt. The modeling process is also based on the motor sheet shape obtained by Boolean operations on some basic geometric figures, and is not fully parameterized. Summary of the invention

[0009] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a method for establishing a full-parameter model of a motor flat wire stator, which is used for designing motors with differentiated advantages.

[0010] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions: In a first aspect, a method for establishing a full-parameter model of a flat wire stator of a motor is disclosed, comprising: Establish a sector ring area, which is area 0: take the origin of the coordinate system as the center of the sector ring area, and then the y-axis is at the symmetry center of the tooth part. The outer diameter of the sector ring is the stator outer diameter RS1, the inner diameter of the sector ring is the stator inner diameter RR1, and the angle of the sector ring is 360 / poles, where poles is the number of poles of the motor. A mechanical angle area of ​​half a tooth groove is established based on the sector ring area, which is area No. 1. This area is a part of the sector ring area, and its outer diameter and inner diameter are consistent with those of the sector ring area. A full parameter model of half a tooth slot is established based on the mechanical angle area of ​​half a tooth slot; Mirror the full parameter model of half of the tooth slot to establish the entire tooth slot structure; A full parameter model is established based on the entire tooth structure.

[0011] In a second aspect, a system for establishing a full-parameter model of a flat wire stator of a motor is disclosed, comprising: The fan-shaped ring area establishment module is configured as follows: the coordinate origin is the center of the fan-shaped ring area, and the y-axis is at the symmetric center of the tooth part. The outer diameter of the fan-shaped ring is the stator outer diameter RS1, the inner diameter of the fan-shaped ring is the stator inner diameter RR1, and the angle of the fan-shaped ring is 360 / poles, where poles is the number of poles of the motor. The module for establishing the mechanical angle region of the half tooth slot is configured to: establish the mechanical angle region of the half tooth slot based on the sector ring region, the region is a part of the sector ring region, and the outer diameter and the inner diameter are consistent with the sector ring region; The full parameter model building module of the half tooth slot is configured to: build the full parameter model of the half tooth slot based on the mechanical angle area of ​​the half tooth slot; The entire tooth slot structure establishment module is configured to: mirror the full parameter model of half of the tooth slot to establish the entire tooth slot structure; The full parameter model building module is configured to build a full parameter model based on the entire tooth slot structure.

[0012] One or more of the above technical solutions have the following beneficial effects: The fully parameterized model of the motor stator established by the technical solution of the present invention is used to cooperate in completing the multi-objective optimization design of the motor, and the model is simple to establish.

[0013] The technical solution of the present invention is based on the commercial finite element software Maxwell, and the process of establishing the motor parameterized model. All the characteristic points and lines of the sheet type are calculated by formulas, and there are corresponding relationships between different characteristics.

[0014] The technical solution of the present invention is aimed at permanent magnet synchronous motors, which are characterized by high efficiency, precise control and a wide range of trials. The full-parameter model of this application is mainly combined with optimization software to perform multi-objective optimization design of motor solutions. It is purely computer-controlled and the intermediate optimization process does not require human intervention. This cannot be achieved with a non-full-parameter model.

[0015] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 A flow chart modeling an embodiment of the present invention; Figure 2 This is a schematic diagram of a fan-shaped ring area according to an embodiment of the present invention; Figure 3 This is a schematic diagram of area No. 0 in an embodiment of the present invention; Figure 4 This is a schematic diagram of area No. 1 of the embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of region No. 1 in Example 1 of the present invention; Figure 6 This is a schematic diagram of a half tooth groove formed by mirroring the entire tooth groove according to an embodiment of the present invention; Figure 7 Schematic diagram of the model and array of copper wires according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0019] It should be noted that the terms used herein are for describing specific embodiments only and are not intended to be limiting of exemplary embodiments according to the present invention.

[0020] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0021] Overall concept: A method for establishing a full parameter model of a motor flat wire stator includes two core steps: The first step is to determine some parameters of the basic variables, including the stator outer diameter RS1, the stator inner diameter RR1, and the number of poles of the motor. The basic variables generally correspond to some key parameters of the motor. These key parameters have a great impact on the motor's solution and performance. During the optimization process, these variables may change. The second step is to establish the mathematical relationship between other variables and the basic variables established in the first step based on the first step, specifically the following HB, HC, etc., and the position calculation formula is the mathematical relationship.

[0022] Embodiment 1 This embodiment discloses a method for establishing a full-parameter model of a flat wire stator of a motor, which specifically includes: S1: The origin of the coordinate system is the center of the sector ring area, and the y-axis is at the symmetric center of the tooth part. The outer diameter of the sector ring is the stator outer diameter RS1, the inner diameter of the sector ring is the stator inner diameter RR1, and the angle of the sector ring is 360 / poles, where poles is the number of poles of the motor. The number of motor poles is one of the basic variables that affect subsequent modeling. The stator outer diameter RS1, the stator inner diameter RR1, and the number of motor poles are all basic variables. These three basic variables must be determined first before the relationship between subsequent variables can be established.

[0023] Area 0 is a sector ring with an angle of 360 / poles and the center at the origin. Area 1 is established based on the left radius of area 0. The outer diameter and inner diameter of area 0 and area 1 are the same. The sector ring formed by the left boundary, right boundary, outer diameter and inner diameter of area 1 is the mechanical angle area of ​​half a tooth groove. △ is the mechanical angle of half a tooth groove. , PPPP is the number of slots per pole per phase, angle, unit: °.

[0024] It should be noted that area 1 is actually a part of area 0. Area 1 is also a fan-shaped ring with an angle of , the center of the circle is also at the origin.

[0025] See attached Figure 4As shown, the mechanical angle area of ​​half a tooth groove is determined as area 1, which is used to define the angle of area 1, that is, the angle of the sector ring.

[0026] S2: Establish a full parameter model of half a tooth slot: First, according to the mechanical angle △ of half a tooth slot, determine the slope of the tooth top as k, which is (sin△, cos△). The slope is used to calculate the arc of the subsequent tooth top and establish the edge of the slot. Then, according to the basic variable slot opening width CAOKK, establish the arc of the tooth top. The slot opening width is a variable, which is a parameter of the motor and can be changed. The code is CAOKK.

[0027] Then the tooth top is established based on the tooth top height CHIDG, tooth shoulder angle CAOJJ and groove width CAOK.

[0028] Then, based on the slot depth, half of the slot is established. The slot depth is a variable of the motor, code-named CAOS.

[0029] Figure 5 The stators of the parallel motors of Line 1, Line 2 and Line 3 contain multiple tooth slots. The above steps are to first establish half of the tooth slot structure, and then form a complete stator tooth slot through the array.

[0030] The stator teeth of the motor are made into a symmetry line passing through the center of the circle, and the adjacent slots are made into a symmetry line passing through the circle line. The part between the two symmetry lines is the full parameter model of half of the tooth slot, specifically: The center of the circle is at the origin, the first point HA is (0, RR1), and the angle p1 is The arc is the arc of the tooth top, and the other end of the arc is called HB, with coordinates (xb, yb). Then, xb and yb can be calculated. .

[0031] The top of the tooth is actually composed of multiple line segments, see the attached Figure 6 As shown: 1) The first segment: The first point is HB (xb, yb), and the second point is HC (xc, yc), where .

[0032] 2) In the second segment, the first point is HC, with the coordinates as above, and the second point is HD (xd, yd).

[0033] 3) The third segment: the first point is HD, the second point is HE (xe, ye), ; 4) The fourth segment: the first point is HE, the second point is HF (xf, yf), , where CAOS is the slot depth, which is also a basic variable and a geometric parameter of the motor.

[0034] S3: Establish the entire tooth structure, Figure 5 and Figure 6 The dotted part in the figure is the mirror image of half of the tooth groove to form the entire tooth groove: according to the half tooth groove structure, the other half of the tooth groove is established by mirroring. The center of the mirror image is the half tooth groove angle. Among them, area 1 is the fan-shaped ring determined by the half tooth groove angle. The radius side on the right side of this fan-shaped ring is the axis of the mirror image. Then the two are set up to form an array to establish the entire tooth groove structure. The number is ; The right radius edge of area 1 is the axis of the mirror; during operation, the software operation process selects all the line segments of the front half of the tooth groove, then performs the mirror operation and selects the mirror axis.

[0035] S4: See Appendix Figure 2 As shown, a full parameter model is established: at the origin, the middle and lower part of the copper wire closest to the inner rotor air gap is taken as the origin, and the full parameter model of the first layer of copper wire is established, and then the array is formed into N layers of copper wire, and the total height of the N layers of copper wire meets the requirements of slot depth, process gap, slot width and slot depth of insulating paper. Then the copper wire is rotated, the rotation angle is half the angle of the tooth slot, and then translated, the translation distance is the rotor outer diameter, air gap width, tooth top height, etc.

[0036] The above steps S1-S3 are preceded by the establishment of stator punching sheets, and step S4 is to establish the relevant model of the copper wire.

[0037] Among them, the full parameter model of the first layer of copper wire is established: the winding, that is, the parameter change of the copper wire, is also a common change of the motor, which needs to be parameterized. Flat wire motors are generally multi-layer windings. First, establish the full parameters of a winding, and then array it.

[0038] See also Figure 2 and Figure 7 , the copper wire model and array need to conform to the constraints of the stator slots, and the mathematical relationship must satisfy: The first layer of copper wire is a rectangle, with the long side of the rectangle along the x-axis and the short side along the y-axis. The coordinates of the four vertices of the rectangle are

[0039] Several layers of copper wires with rectangular cross-sections are placed in the copper wire trough. There is insulating paint on the outside of the copper wire. Several layers of copper wires are wrapped with insulating paper before being placed in the copper wire trough. There is a gap between the copper wire and the copper wire trough due to process reasons. GYJX is the process gap, JYZH is the thickness of the insulating paper, QPHD is the thickness of the insulating paint, and BXCS is the number of flat wire layers, all of which are variables.

[0040] The array is arranged along the negative direction of the y-axis, and the number is BXCS.

[0041] The rotation angle is half the mechanical angle of the tooth slot, rotating along the origin in a clockwise direction; The translation distance is (0,0)→HG(xg,yg), xg=xf-(JYZH+GYJX)sin△, .

[0042] The advantage of the above approach is that the relevant dimensions and positions of the stator windings can change with the changes in other variables without the need to reset the model.

[0043] Embodiment 2 The purpose of this embodiment is to provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the program.

[0044] Embodiment 3 The purpose of this embodiment is to provide a computer-readable storage medium.

[0045] A computer-readable storage medium stores a computer program, which executes the steps of the above method when executed by a processor.

[0046] Embodiment 4 The purpose of this embodiment is to provide a motor flat wire stator full parameter model establishment system, including: The fan-shaped ring area establishment module is configured as follows: the coordinate origin is the center of the fan-shaped ring area, and the y-axis is at the symmetric center of the tooth part. The outer diameter of the fan-shaped ring is the stator outer diameter RS1, the inner diameter of the fan-shaped ring is the stator inner diameter RR1, and the angle of the fan-shaped ring is 360 / poles, where poles is the number of poles of the motor. The module for establishing the mechanical angle region of the half tooth slot is configured to: establish the mechanical angle region of the half tooth slot based on the sector ring region, the region is a part of the sector ring region, and the outer diameter and the inner diameter are consistent with the sector ring region; The full parameter model building module of the half tooth slot is configured to: build the full parameter model of the half tooth slot based on the mechanical angle area of ​​the half tooth slot; The entire tooth slot structure establishment module is configured to: mirror the full parameter model of half of the tooth slot to establish the entire tooth slot structure; The full parameter model building module is configured to build a full parameter model based on the entire tooth slot structure.

[0047] Embodiment 5 The purpose of this embodiment is to provide a computer program product containing instructions, which, when running on a computer, enables the computer to execute the methods and functions involved in any of the above embodiments. The steps involved in the apparatus of the above embodiment correspond to the method embodiment 1, and the specific implementation method can refer to the relevant description part of embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood to include any medium that can store, encode or carry an instruction set for execution by a processor and enable the processor to execute any method in the present invention.

[0048] Those skilled in the art should understand that the modules or steps of the present invention described above can be implemented by a general-purpose computer device, or alternatively, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. The present invention is not limited to any specific combination of hardware and software.

[0049] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A method for establishing a full-parameter model of a flat wire stator of a motor, characterized in that: include: Establish a sector ring area, which is area 0: take the origin of the coordinate system as the center of the sector ring area, and then the y-axis is at the symmetry center of the tooth part. The outer diameter of the sector ring is the stator outer diameter RS1, the inner diameter of the sector ring is the stator inner diameter RR1, and the angle of the sector ring is 360 / poles, where poles is the number of poles of the motor. A mechanical angle area of ​​half a tooth groove is established based on the sector ring area, which is area No.

1. This area is a part of the sector ring area, and its outer diameter and inner diameter are consistent with those of the sector ring area. A full parameter model of half a tooth slot is established based on the mechanical angle area of ​​half a tooth slot; Mirror the full parameter model of half of the tooth slot to establish the entire tooth slot structure; A full parameter model is established based on the entire tooth structure.

2. A method for establishing a full-parameter model of a motor flat wire stator according to claim 1, characterized in that: The mechanical angle area of ​​half a tooth slot corresponds to the angle of the sector ring, specifically: Where PPPP is the number of slots per pole per phase, poles is the number of poles of the motor, and △ is the mechanical angle of half a tooth slot.

3. The method for establishing a full-parameter model of a flat wire stator of a motor according to claim 1, characterized in that: The method of establishing a full parameter model of half a tooth slot is: First, according to the mechanical angle △ of half of the tooth groove, determine the slope of the tooth top as k, which is (sin△, cos△). The slope is used to calculate the arc of the subsequent tooth top and establish the edge line of the groove; Then, the arc of the tooth top is established according to the basic variable slot opening width CAOKK; Then the tooth top is established according to the tooth top height CHIDG, tooth shoulder angle CAOJJ and groove width CAOK; Then, based on the groove depth, build half of the groove.

4. The method for establishing a full-parameter model of a flat wire stator of a motor according to claim 1, characterized in that: A symmetry line passing through the center of the circle is made on the teeth of the motor stator, and a symmetry line passing through the center of the circle is made on the adjacent slots. The part between the two symmetry lines is the full parameter model of half the tooth slot.

5. The method for establishing a full-parameter model of a motor flat wire stator according to claim 1, characterized in that: A full parameter model of half a tooth slot is established based on the mechanical angle area of ​​half a tooth slot, including: According to the half tooth groove structure, the other half of the tooth groove is established by using mirroring. The center of the mirror is the half tooth groove angle. Among them, area 1 is the fan-shaped ring determined by the half tooth groove angle. The radius edge on the right side of this fan-shaped ring is the axis of the mirror. Then the two are set up to establish the entire tooth groove structure in array, with a number of 3*PPPP; the radius edge on the right side of area 1 is the axis of the mirror.

6. A method for establishing a full-parameter model of a flat wire stator of a motor according to claim 1, characterized in that: When building a full parameter model, it includes: At the origin, the lower middle part of the copper wire closest to the inner rotor air gap is taken as the origin, and the full parameter model of the first layer of copper wire is established, and then arrayed into N layers of copper wires. The total height of the N layers of copper wires meets the requirements of slot depth, process gap, slot width and slot depth of insulating paper; The copper wire is then rotated by an angle of half a tooth groove and then translated.

7. A system for establishing a full-parameter model of a flat-wire stator of a motor, characterized in that: include: The fan-shaped ring area establishment module is configured as follows: the coordinate origin is the center of the fan-shaped ring area, and the y-axis is at the symmetric center of the tooth part. The outer diameter of the fan-shaped ring is the stator outer diameter RS1, the inner diameter of the fan-shaped ring is the stator inner diameter RR1, and the angle of the fan-shaped ring is 360 / poles, where poles is the number of poles of the motor. The module for establishing the mechanical angle region of the half tooth slot is configured to: establish the mechanical angle region of the half tooth slot based on the sector ring region, the region is a part of the sector ring region, and the outer diameter and the inner diameter are consistent with the sector ring region; The full parameter model building module of the half tooth slot is configured to: build the full parameter model of the half tooth slot based on the mechanical angle area of ​​the half tooth slot; The entire tooth slot structure establishment module is configured to: mirror the full parameter model of half of the tooth slot to establish the entire tooth slot structure; The full parameter model building module is configured to build a full parameter model based on the entire tooth slot structure.

8. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method described in any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 6 are performed.

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