A method and system for establishing a full-parameter model of a motor flat wire stator

Abstract

The present invention proposes a method and system for establishing a full-parameter model of a motor flat wire stator, belonging to the technical field of model establishment for motor design and development, including: establishing a fan-shaped ring region, which is Region 0: with the coordinate origin as the center of the fan-shaped ring region, then the y-axis is at the symmetry center of the tooth part, the outer diameter of the fan-shaped ring is the outer diameter RS1 of the stator, the inner diameter of the fan-shaped ring is the inner diameter RR1 of the stator, and the angle of the fan-shaped ring is 360 / poles, where poles is the number of poles of the motor; establishing a mechanical angle region of half a tooth slot based on the fan-shaped ring region, which is Region 1, and this region is a part of the fan-shaped ring region, with the outer diameter and inner diameter being the same as those of the fan-shaped ring region; establishing a full-parameter model of half a tooth slot based on the mechanical angle region of half a tooth slot; mirroring the full-parameter model of half a tooth slot to establish all the tooth slot structures; and establishing a full-parameter model based on all the tooth slot structures.

Description

Technical Field

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

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

[0003] During the development of motor products, there are many variables and objective functions of the motor. Therefore, during the motor development process, it is necessary to carry out multi-objective optimization design of the motor, and a perfect full-parameter model of the motor is required, which is very beneficial for improving the motor optimization efficiency and optimization degree.

[0004] Full parameters are a description of the motor parametric model. "Full" means that all dimensional constraints of this motor can be made into variables, so that the dimensions of this motor can be changed very conveniently without having to rebuild the model.

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

[0006] The parametric model is also the core of motor multi-objective optimization. An optimal result is usually selected after calculating 5000 - 10000 motor schemes for a motor scheme. Only relying on the full-parameter model can the software calculate these schemes without manual intervention in the middle. If it is a non-full-parameter model, every time the parameters change, it is necessary to manually operate to establish a model and calculate it once, which requires thousands of manual operations, and the efficiency is also unacceptable.

[0007] Currently, the factors affecting the motor stator include the number of slots, slot-related dimensions, insulating paper and process gaps, as well as the maturity of flat wire, fillets of flat wire, etc. Accurately establishing the model of flat wire is very helpful for accurately calculating the AC copper loss.

[0008] In the prior art, the focus is on the finite element simulation or equivalent simulation modeling method of the motor, specifically the simulation modeling method other than the standard commercial finite element simulation. The models in the prior art can only calculate the simulation results of the motor with the current parameters. If the parameters need to be changed, a new model needs to be established. The modeling process is also based on some basic geometric figures to perform Boolean operations to obtain the motor lamination shape, which is not fully parameterized. Summary of the Invention

[0009] To overcome the deficiencies of the above prior art, the present invention provides a method for establishing a full-parameter model of a motor flat wire stator for motor design with differential advantages.

[0010] To achieve the above object, one or more embodiments of the present invention provide the following technical solutions:

[0011] In the first aspect, a method for establishing a full-parameter model of a motor flat wire stator is disclosed, including:

[0012] Establish a fan-shaped ring region, which is Region 0: Taking the origin of coordinates as the center of the fan-shaped ring region, then the y-axis is at the symmetry 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;

[0013] Based on the fan-shaped ring region, establish a mechanical angle region of half a tooth slot, which is Region 1. This region is a part of the fan-shaped ring region, and its outer diameter and inner diameter are the same as those of the fan-shaped ring region;

[0014] Based on the mechanical angle region of half a tooth slot, establish a full-parameter model of half a tooth slot;

[0015] Mirror the full-parameter model of half a tooth slot to establish the entire tooth slot structure;

[0016] Based on the entire tooth slot structure, establish a full-parameter model.

[0017] In the second aspect, a system for establishing a full-parameter model of a motor flat wire stator is disclosed, including:

[0018] A fan-shaped ring region establishment module, configured to: take the origin of coordinates as the center of the fan-shaped ring region, then the y-axis is at the symmetry 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;

[0019] A mechanical angle region establishment module of half a tooth slot, configured to: based on the fan-shaped ring region, establish a mechanical angle region of half a tooth slot. This region is a part of the fan-shaped ring region, and its outer diameter and inner diameter are the same as those of the fan-shaped ring region;

[0020] The full-parameter model establishment module for half a tooth slot is configured to: establish a full-parameter model for half a tooth slot based on the mechanical angle region of half a tooth slot;

[0021] The establishment module for all tooth slot structures is configured to: mirror the full-parameter model of half a tooth slot to establish all tooth slot structures;

[0022] The full-parameter model establishment module is configured to: establish a full-parameter model based on all tooth slot structures.

[0023] The above one or more technical solutions have the following beneficial effects:

[0024] The full-parameterized model of the motor stator established by the technical solution of the present invention is used to cooperate to complete the multi-objective optimization design of the motor, and the model establishment is simple.

[0025] The technical solution of the present invention is based on the commercial finite element software Maxwell to establish the process of the parametric model of the motor. All characteristic points and lines of the sheet type are calculated by formulas, and there are corresponding relationships between different characteristics.

[0026] The technical solution of the present invention is aimed at permanent magnet synchronous motors. The characteristics of the motors are high efficiency, precise control, and wide application range. The full-parameter model of this application is mainly combined with optimization software to conduct multi-objective optimization design of the motor scheme. It is purely computer-controlled, and the intermediate optimization process does not require manual intervention, which cannot be achieved by non-full-parameter models.

[0027] The advantages of the additional aspects of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Brief Description of the Drawings

[0028] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0029] Figure 1 It is a flowchart for modeling the embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the fan-shaped ring area of the embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of area No. 0 of the embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of area No. 1 of the embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of area No. 1 of the embodiment of the present invention;

[0034] Figure 6 Schematic diagram of the whole tooth slot formed after mirroring half of the tooth slot in the embodiment of the present invention;

[0035] Figure 7 Schematic diagram of the model and array of copper wires in the embodiment of the present invention. Detailed implementation manners

[0036] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0037] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present invention.

[0038] Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0039] Overall concept: A method for establishing a full-parameter model of a motor flat wire stator includes two core steps:

[0040] The first step is to determine a part of the parameters of the basic variables, specifically including the stator outer diameter RS1, the stator inner diameter RR1, and the number of poles poles of the motor. The basic variables are generally some key parameters corresponding to the motor, and these key parameters have a relatively large impact on the motor's scheme and performance. During the optimization process, these variables may change;

[0041] The second step is to establish the mathematical relationships between other variables and the basic variables established in the first step, specifically HB, HC, etc. later, and the position calculation formula is the mathematical relationship.

[0042] Embodiment 1

[0043] This embodiment discloses a method for establishing a full-parameter model of a motor flat wire stator, specifically including:

[0044] S1: Taking the origin of coordinates as the center of the fan-shaped ring area, then the y-axis is at the symmetry 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;

[0045] The number of poles of the motor is one of the basic variables affecting subsequent modeling. The stator outer diameter RS1, the stator inner diameter RR1, and the number of poles poles of the motor are all basic variables. Only after these three basic variables are determined can the relationships of subsequent variables be established.

[0046] Region 0 is a sector ring with an angle of 360 / poles and its center at the origin. Region 1 is established based on the left radius of Region 0. The outer and inner diameters of Region 0 and Region 1 are the same. The sector ring formed by the left boundary, right boundary, outer diameter, and inner diameter of Region 1 is the mechanical angle region of half a tooth slot. △ is the mechanical angle of half a tooth slot. , PPPP is the number of slots per pole per phase, and the angle is in degrees.

[0047] It should be noted that Region 1 is actually a part of Region 0. Region 1 is also a sector ring with a sector ring angle of , and its center is also at the origin.

[0048] See the appendix Figure 4 As shown, the mechanical angle region of half a tooth slot is determined as Region 1, and the angle used to define Region 1, that is, the angle of the sector ring.

[0049] S2: Establish a full-parameter model of half a tooth slot: First, according to the mechanical angle △ of half a tooth slot, determine that the slope of the tooth tip is k, which is (sin△, cos△). The slope is used to calculate the arc of the tooth tip and establish the side line of the slot later. Then, according to the basic variable slot opening width CAOKK, establish the arc of the tooth tip. The slot opening width is a variable and is a parameter of the motor, which can be changed, and its code is CAOKK.

[0050] Then, according to the tooth tip height CHIDG, the tooth shoulder angle CAOJJ, and the slot width CAOK, establish the tooth top part.

[0051] Then, according to the slot depth, establish half of the slot. The slot depth is a variable of the motor, and its code is CAOS.

[0052] Figure 5 In the figure, Lines 1, 2, and 3 are all parallel. The motor stator contains multiple tooth slots. The above steps are to first establish the structure of half a tooth slot, and then through arraying, form the complete stator tooth slots.

[0053] Make a symmetry line passing through the center of the circle for the tooth part of the motor stator, and make a symmetry line passing through the circle line for the adjacent slot. The part between the two symmetry lines is the full-parameter model of half a tooth slot, specifically:

[0054] The center is at the origin, the first point HA is (0, RR1), and then the angle p1 is of the arc, which is the arc of the tooth tip. Then the other end point of the arc is called HB, and its coordinates are (xb, yb). Then, xb and yb can be calculated. .

[0055] The tooth top part is actually composed of multiple line segments. See the appendix Figure 6 as shown:

[0056] 1) The first paragraph: The first point is HB(xb, yb), and the second point is HC(xc, yc), where .

[0057] 2) The second paragraph: The first point is HC with the coordinates as above, and the second point is HD(xd, yd).

[0058] 3) The third paragraph: The first point is HD, and the second point is HE(xe, ye). ;

[0059] 4) The fourth paragraph: The first point is HE, and the second point is HF(xf, yf). , where CAOS is the slot depth, which is also the basic variable and a geometric parameter of the motor.

[0060] S3: Establish all the tooth-slot structures. Figure 5 and Figure 6 The dashed part in forms the whole tooth-slot after mirroring half of the tooth-slot: After the half-tooth-slot structure, use mirroring to establish the other half of the tooth-slot. The center of mirroring is the half-tooth-slot angle. Among them, Region 1 is the sector ring determined by the half-tooth-slot angle. The right radius side of this sector ring is the axis of mirroring. Then, establish a set with the two and perform array to establish all the tooth-slot structures, and the number is

[0061] ; The right radius side of Region 1 is the axis of mirroring; During operation, in the software operation process, select all the line segments of the previous half-tooth-slot, and then perform mirroring operation and select the axis of mirroring. Figure 2 S4: Refer to the attachment

[0062] as shown, and establish the full-parameter model: At the origin, with the middle and lower part of the copper wire closest to the inner rotor air gap as the origin, establish the full-parameter model of the first layer of copper wire, and then array it into N layers of copper wire. The total height of the N layers of copper wire meets the requirements of slot depth, process gap, slot width and slot depth of the insulating paper. Then rotate the copper wire, and the rotation angle is the half-tooth-slot angle, and then perform translation, and the translation distance is the rotor outer diameter, air gap width, tooth top height, etc.

[0063] The stator punching sheet was established before the above steps S1 - S3, and step S4 is to establish the relevant model of the copper wire.

[0064] Refer to Figure 2 and Figure 7 , the model and array of the copper wire need to meet the constraints of the stator slot, and the mathematical relationship should satisfy:

[0065] The first layer of copper wire is a rectangle. The long side of the rectangle is along the x-axis direction, and the short side is along the y-axis direction. The coordinates of the 4 vertices of the rectangle are

[0066]

[0067] Several layers of copper wire with a rectangular cross-section are placed in the copper wire groove. The outside of the copper wire has an insulating paint coating. Before the several layers of copper wire are placed in the copper wire groove, they are first wrapped with insulating paper. There is a gap between the copper wire and the copper wire groove due to technological reasons. GYJX is the technological gap, JYZH is the thickness of the insulating paper, QPHD is the thickness of the insulating paint coating, and BXCS is the number of flat wire layers, all of which are variables.

[0068] An array is performed along the negative y-axis direction, and the number is BXCS.

[0069] The rotation angle is the mechanical angle of half a tooth slot, and the rotation is performed along the origin in the clockwise direction;

[0070] The translation distance is (0, 0) → HG (xg, yg), where xg = xf - (JYZH + GYJX) sin△, .

[0071] The advantage of the above method is that the relevant dimensions and positions of the stator winding can change with the changes of other variables without the need to reset the model.

[0072] Example Two

[0073] The purpose of this embodiment is to provide a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the above method are implemented.

[0074] Example Three

[0075] The purpose of this embodiment is to provide a computer-readable storage medium.

[0076] A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are executed.

[0077] Example Four

[0078] The purpose of this embodiment is to provide a system for establishing a full-parameter model of a motor flat wire stator, including:

[0079] Sector ring region establishment module, configured to: take the origin of coordinates as the center of the sector ring region, 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;

[0080] Mechanical angle region establishment module for half a tooth slot, configured to: establish a mechanical angle region for half a tooth slot based on the sector ring region, and this region is a part of the sector ring region, with the outer diameter and inner diameter being the same as those of the sector ring region;

[0081] Full-parameter model establishment module for half a tooth slot, configured to: establish a full-parameter model for half a tooth slot based on the mechanical angle region of half a tooth slot;

[0082] All tooth slot structure establishment module, configured to: mirror the full-parameter model of half a tooth slot to establish all tooth slot structures;

[0083] Full-parameter model establishment module, configured to: establish a full-parameter model based on all tooth slot structures.

[0084] Example Five

[0085] The purpose of this example 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 one of the above examples.

[0086] The steps involved in the devices of the above examples correspond to those in Method Example One, and the specific implementation can be referred to the relevant description part of Example One. The term "computer-readable storage medium" should be understood to include a single medium or multiple media containing 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.

[0087] Those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computer device. Optionally, they can be implemented by program codes 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 separately made into individual integrated circuit modules, or multiple modules or steps among them can be made into a single integrated circuit module to implement. The present invention is not limited to any specific combination of hardware and software.

[0088] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are 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 without creative efforts based on the technical solutions of the present invention 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. The method of establishing the full parameter model of half a tooth slot is as follows: 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, according to the depth of the groove, build half of the groove; A symmetry line is made through the center of the circle for the motor stator teeth, and a symmetry line is made through the center of the circle for the adjacent slots. The part between the two symmetry lines is the full parameter model of half the 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 full parameter model of half of the tooth slot is mirrored to establish the entire tooth slot structure, 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.

4. The 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.

5. 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 module for establishing the full parameter model of half a tooth slot is configured to establish the full parameter model of half a tooth slot based on the mechanical angle area of ​​half a tooth slot. The method for establishing the full parameter model of half a tooth slot is as follows: 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, according to the depth of the groove, build half of the groove; A symmetry line is made through the center of the circle for the motor stator teeth, and a symmetry line is made through the center of the circle for the adjacent slots. The part between the two symmetry lines is the full parameter model of half the 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.

6. 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 4 is implemented.

7. 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 4 are implemented.

8. 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 4 are performed.

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