Method and device for processing motor iron core punching sheet, electronic equipment and storage medium

Abstract

The invention relates to the technical field of motors, and discloses a method for processing a motor iron core punching sheet, and the motor iron core punching sheet comprises a rotor punching sheet. The method comprises the following steps: acquiring the number of poles of a motor and an excircle trimming type, and determining an excircle trimming endpoint of a rotor punching sheet according to the number of poles of the motor and the excircle trimming type; and connecting the outer circle cut edge end points according to the outer circle cut edge type to obtain a first target cut edge. And processing the rotor punching sheet according to the first target trimming. Therefore, the rotor punching sheet is processed according to the first target cut edge, and the cogging torque and the torque ripple of the motor can be effectively reduced under the condition that the motor adopts the processed motor iron core punching sheet, so that the electromagnetic noise of the motor is reduced, and the problem that the noise is too large when the compressor runs is solved. The invention further discloses a device for machining the motor iron core punching sheet, electronic equipment and a storage medium.

Description

Technical Field

[0001] The present application relates to the field of motor technology, for example, to a method and device, electronic equipment, and storage medium for processing motor core punching sheets. Background Art

[0002] At present, in the compressor industry, the energy efficiency level of compressors has approached the performance ceiling, but the product noise problem has become more and more prominent. With the improvement of people's living standards, people's requirements for the noise of compressors and their motors have gradually increased. Motor noise is the main source of compressor noise. How to reduce the noise of compressor motors is one of the technical problems that urgently need to be overcome in the compressor field today. Torque pulsation is the main cause of vibration and noise generated by motors, and torque pulsation also affects the application of motors in low-ripple speed regulation systems, and greatly affects the stability of motor speed. The main reasons for motor torque pulsation are as follows: principle electromagnetic torque pulsation caused by non-ideal back-EMF waveform, torque pulsation caused by cogging torque, torque pulsation caused by current commutation, torque pulsation caused by motor process defects, etc. In the design of the motor body, cogging torque optimization is the main method to reduce torque pulsation.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] In order to ensure the uniformity of the air gap after the motor stator and rotor are assembled, the inner circle of the motor stator and the outer circle of the rotor are generally designed to be full circles and concentric. However, the full-circular motor stator and rotor structure has the problem of poor sinusoidalization of the motor air gap magnetic flux, which easily leads to large motor cogging torque and torque pulsation, thereby causing large electromagnetic noise.

[0005] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method and device, an electronic device, and a storage medium for processing motor core punching sheets, so as to solve the problem of excessive noise during operation of a compressor.

[0008] In some embodiments, the method for processing a motor core punching sheet includes a rotor punching sheet; the method includes: obtaining the number of motor poles and the type of outer circle cutting edge, and determining the outer circle cutting edge endpoints of the rotor punching sheet according to the number of motor poles and the type of outer circle cutting edge. Connecting the outer circle cutting edge endpoints according to the type of outer circle cutting edge to obtain a first target cutting edge. Processing the rotor punching sheet according to the first target cutting edge.

[0009] In some embodiments, the outer circle cutting edge point of the rotor punching is determined according to the number of motor poles and the outer circle cutting type, including: when the outer circle cutting type is a straight line cutting or an arc cutting corresponding to an acute angle, the first angle is obtained by calculating using the number of motor poles according to a first preset algorithm. The first angle is the angle between the first connecting line and the preset d-axis, and the first connecting line is the connecting line between the outer circle cutting edge point and the outer circle center of the rotor punching. The outer circle radius of the rotor punching is obtained, and the coordinates of the outer circle cutting edge point are obtained by calculating using the outer circle radius and the first angle according to a preset trigonometric function.

[0010] In some embodiments, the outer circle cutting edge point of the rotor punching is determined according to the number of motor poles and the outer circle cutting type, including: when the outer circle cutting type is the arc cutting corresponding to the reflex angle, the second angle is obtained by calculating the second angle using the number of motor poles according to a second preset algorithm. The second angle is the angle between the second connecting line and the preset d-axis, and the second connecting line is the connecting line between the outer circle cutting edge point and the outer circle center of the rotor punching. The outer circle radius of the rotor punching is obtained. The coordinates of the outer circle cutting edge point are obtained by calculating the outer circle radius and the second angle according to a preset trigonometric function.

[0011] In some embodiments, the outer circle trimming end points are connected according to the outer circle trimming type to obtain the first target trimming, including: when the outer circle trimming type is straight line trimming, directly connecting the outer circle trimming end points to obtain the first target trimming.

[0012] In some embodiments, the end points of the outer circle trimming are connected according to the outer circle trimming type to obtain the first target trimming, including: when the outer circle trimming type is arc trimming, determining the auxiliary center of the arc trimming. The arc trimming includes the arc trimming corresponding to the acute angle and the arc trimming corresponding to the superior angle. With the auxiliary center of the arc trimming as the center, the outer circle trimming end points are used as the starting and ending points to generate an arc trajectory. The end points of the outer circle trimming are connected according to the arc trajectory to obtain the first target trimming.

[0013] In some embodiments, the motor core punching sheet includes a stator punching sheet, and after the rotor punching sheet is processed according to the first target trimming, it also includes: determining the inner diameter arc trimming end point of the stator tooth shoe of the stator punching sheet. Taking the inner diameter arc trimming end point as the starting point, an extension line is made along a direction perpendicular to the preset d-axis to determine the first intersection and the second intersection with the stator tooth shoe. The first intersection and the second intersection are connected to obtain the second target trimming. The stator punching sheet is processed according to the second target trimming.

[0014] In some embodiments, determining the inner diameter arc trimming endpoint of the stator tooth shoe of the stator punching sheet includes: calculating using the number of motor poles according to a third preset algorithm to obtain a third angle corresponding to the inner diameter arc trimming. The third angle is the angle between the third connecting line and the preset d-axis, and the third connecting line is the line between the inner diameter arc trimming endpoint and the outer circle center of the rotor punching sheet. The inner diameter arc trimming endpoint is determined according to the third angle corresponding to the inner diameter arc trimming.

[0015] In some embodiments, the apparatus for processing motor core punching sheets includes: a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for processing motor core punching sheets when executing the program instructions.

[0016] In some embodiments, the electronic device includes: an electronic device body; and the device for processing motor core punching sheets as described above, which is installed on the electronic device body.

[0017] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for processing motor core punching sheets is executed.

[0018] The method and device, electronic device, and storage medium for processing motor core punching sheets provided by the embodiments of the present disclosure can achieve the following technical effects: by obtaining the number of motor poles and the type of outer circle cutting, the outer circle cutting end points of the rotor punching sheets are determined according to the number of motor poles and the type of outer circle cutting. The outer circle cutting end points are connected according to the outer circle cutting type to obtain a first target cutting. The rotor punching sheets are processed according to the first target cutting. In this way, by processing the rotor punching sheets according to the first target cutting, when the motor uses the processed motor core punching sheets, the motor tooth torque and torque pulsation can be effectively reduced, thereby reducing the motor electromagnetic noise, and solving the problem of excessive noise during compressor operation.

[0019] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0021] Figure 1 is a schematic diagram of a method for processing motor core punching sheets provided by an embodiment of the present disclosure;

[0022] Figure 2 It is a schematic diagram of the structure of a rotor punching plate with straight-line cutting edge;

[0023] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at the cutting edge of the middle straight line;

[0024] Figure 4 This is a schematic diagram comparing the results of motor cogging torque using straight-line cutting;

[0025] Figure 5 It is a schematic diagram of the structure of a rotor punching plate with an arc line cutting edge corresponding to an acute angle;

[0026] Figure 6 yes Figure 5 A magnified schematic diagram of the structure at the cutting edge of the middle arc line;

[0027] Figure 7 This is a schematic diagram comparing the results of the motor cogging torque using the circular arc cutting edge corresponding to the acute angle;

[0028] Figure 8 It is a schematic diagram of the structure of a rotor punching plate with an arc line cutting edge corresponding to the reflex angle;

[0029] Fig. 9 This is a schematic diagram comparing the results of the motor cogging torque using the circular arc cutting edge corresponding to the reflex angle;

[0030] Fig.10 It is a schematic diagram comparing the cogging torque results of the outer cutting edge of the rotor punching;

[0031] Fig.11 It is a schematic diagram of the structure of the cutting edge of the stator tooth shoe;

[0032] Fig.12 yes Fig.11 A magnified schematic diagram of the structure at the cutting edge of the middle stator tooth shoe;

[0033] Fig.13 This is a schematic diagram comparing the cogging torque results using stator tooth shoe cutting edges;

[0034] Fig.14 This is another schematic diagram comparing the cogging torque results using stator tooth shoe trimming;

[0035] Fig.15 It is a schematic diagram of the structure of a device for processing motor core punching sheets provided in an embodiment of the present disclosure.

[0036] Reference numerals:

[0037] 1: The motor cogging torque waveform when the outer circle of the rotor punching is a full circle; 2: The motor cogging torque waveform when the outer circle of the rotor punching adopts a straight line cutting edge on the d-axis; 3: The motor cogging torque waveform when the outer circle of the rotor punching adopts a straight line cutting edge on the q-axis; 4: The motor cogging torque waveform when the outer circle of the rotor punching adopts a circular arc cutting edge corresponding to an acute angle on the d-axis; 5: The motor cogging torque waveform when the outer circle of the rotor punching adopts a circular arc cutting edge corresponding to an apparent angle on the d-axis; 6: The motor cogging torque waveform when the outer circle of the rotor punching adopts a stator tooth shoe cutting edge on the basis of an arc cutting edge corresponding to an acute angle; 7: The motor cogging torque waveform when the outer circle of the rotor punching adopts a stator tooth shoe cutting edge on the basis of an arc cutting edge corresponding to an apparent angle. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0039] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] Unless otherwise stated, the term "plurality" means two or more.

[0041] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0042] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0043] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0044] In the disclosed embodiment, the compressor motor includes a stator assembly and a rotor assembly. The stator assembly includes a stator core and a winding, and the rotor assembly includes a rotor core, a magnetic steel, and a baffle. The motor core punchings include stator punchings and rotor punchings. The stator core is formed by stacking stator punchings, and the rotor core is formed by stacking rotor punchings. In the compressor motor, the motor usually selects slot-pole combinations such as 6 slots and 4 poles, 9 slots and 6 poles, and 12 slots and 8 poles. Assume that the number of motor slots is S and the number of motor poles is P. Then the spatial angle occupied by one pole of magnetic steel is α=360° / P.

[0045] Combination Figure 1 As shown, an embodiment of the present disclosure provides a method for processing a motor core punching sheet, wherein the motor core punching sheet includes a rotor punching sheet. The method comprises:

[0046] Step S101: the electronic device obtains the number of motor poles and the type of outer circle cutting edge.

[0047] Step S102: the electronic device determines the outer circle cutting edge points of the rotor punching according to the number of motor poles and the outer circle cutting type.

[0048] Step S103: the electronic device connects the end points of the outer circle cutting edge according to the outer circle cutting edge type to obtain a first target cutting edge.

[0049] Step S104: the electronic device processes the rotor punching sheet according to the first target trimming.

[0050] The method for processing motor core punching sheets provided by the embodiment of the present disclosure is adopted. By obtaining the number of motor poles and the type of outer circle cutting, the outer circle cutting end points of the rotor punching sheets are determined according to the number of motor poles and the type of outer circle cutting. The outer circle cutting end points are connected according to the outer circle cutting type to obtain a first target cutting. The rotor punching sheets are processed according to the first target cutting. In this way, by processing the rotor punching sheets according to the first target cutting, when the motor adopts the processed motor core punching sheets, the motor cogging torque and torque pulsation can be effectively reduced, thereby reducing the motor electromagnetic noise, and solving the problem of excessive noise during compressor operation.

[0051] In some embodiments, the electronic device obtains the number of motor poles, including: the electronic device determines the parameter input by the user as the number of motor poles.

[0052] Furthermore, the electronic device determines the outer circle cutting edge point of the rotor punching according to the number of motor poles and the outer circle cutting type, including: when the outer circle cutting type is a straight line cutting or an arc cutting corresponding to an acute angle, the electronic device uses the number of motor poles to calculate and obtain a first angle according to a first preset algorithm. The first angle is the angle between the first connecting line and the preset d-axis, and the first connecting line is the connecting line between the outer circle cutting edge point and the outer circle center of the rotor punching. Obtain the outer circle radius of the rotor punching. Calculate using the outer circle radius and the first angle according to a preset trigonometric function to obtain the coordinates of the outer circle cutting edge point.

[0053] In some embodiments, a coordinate system is constructed with the center of the outer circle of the rotor punching sheet as the origin, the horizontal line as the horizontal axis, and the vertical line as the vertical axis. The preset d-axis is the vertical axis in the coordinate system, that is, the y-axis.

[0054] Furthermore, the electronic device calculates according to the first preset algorithm using the number of motor poles to obtain the first angle, including: the electronic device calculates Obtain a first angle. Wherein, θ is the first angle, and P is the number of motor poles. In some embodiments, In this case, the effect of reducing the cogging torque and torque pulsation is best, which can better reduce the electromagnetic noise of the motor.

[0055] In some embodiments, when the outer circle cutting edge type is a straight line cutting edge or an arc cutting edge corresponding to an acute angle, the outer circle cutting edge endpoints include point A and point C. The coordinates of the outer circle cutting edge endpoint point A are (-R in ×sinθ,,R in ×cosθ), the coordinates of the end point C of the outer circle tangent edge are (R in ×sinθ,R in ×cosθ). Where R in is the outer radius of the rotor punching, and θ is the first angle.

[0056] Furthermore, the electronic device determines the outer circle cutting edge point of the rotor punching according to the number of motor poles and the outer circle cutting type, including: when the outer circle cutting type is the arc cutting corresponding to the reflex angle, the electronic device uses the number of motor poles to calculate and obtain the second angle according to the second preset algorithm. The second angle is the angle between the second connecting line and the preset d-axis, and the second connecting line is the connecting line between the outer circle cutting edge point and the outer circle center of the rotor punching. Obtain the outer circle radius of the rotor punching. Calculate using the outer circle radius and the second angle according to the preset trigonometric function to obtain the coordinates of the outer circle cutting edge point.

[0057] Further, the electronic device calculates according to the second preset algorithm using the number of motor poles to obtain the second angle, including: the electronic device calculates Obtain a second angle. Wherein, θ′ is the second angle, and P is the number of motor poles. In some embodiments, In this case, the effect of reducing the cogging torque and torque pulsation is best, which can better reduce the electromagnetic noise of the motor.

[0058] In some embodiments, when the outer circle cutting edge type is the arc cutting edge corresponding to the reflex angle, the outer circle cutting edge endpoints include point A' and point C'. The coordinates of the outer circle cutting edge endpoint A' are (-R in ×sinθ′,R in ×cosΔ′), the coordinates of the end point C′ of the outer circle tangent edge are (R in ×sinΔ′,R in ×cosΔ′). Where Δ′ is the second angle, R in is the outer radius of the rotor punching.

[0059] Furthermore, the electronic device connects the outer circle cutting end points according to the outer circle cutting type to obtain a first target cutting, including: when the outer circle cutting type is straight line cutting, the electronic device directly connects the outer circle cutting end points to obtain the first target cutting.

[0060] In some embodiments, the first target cut edge is a straight cut edge.

[0061] Combination Figures 2 to 4 As shown, Figure 2 It is a schematic diagram of the structure of a rotor punching sheet using straight-line cutting provided in an embodiment of the present disclosure. Figure 3 yes Figure 2 An enlarged schematic diagram of the structure at the cutting edge of the middle straight line. Figure 4 It is a schematic diagram comparing the results of the motor tooth torque using straight-line cutting provided by an embodiment of the present disclosure. Figure 2 In the figure, the coordinate system is constructed with the center O of the rotor punch as the origin, the horizontal axis is the x-axis, the vertical axis is the y-axis, and the vertical axis is also the d-axis of the rotor punch. When the outer circle cutting type is straight line cutting, point A and point C are symmetrical about the y-axis, and point B is the midpoint of the outer circle cutting end points A and C. The coordinates of point A are (-R in ×sinθ,R in ×cosθ), the coordinates of point C are (R in ×sinθ,R in ×cosθ). Where R in is the outer radius of the rotor punching. Then the coordinates of point B are (0, R in × cosθ). Figure 4The waveforms include the motor cogging torque waveform 1 when the outer circle of the rotor sheet is a full circle, the motor cogging torque waveform 2 when the outer circle of the rotor sheet is a straight line cut edge on the d-axis, and the motor cogging torque waveform 3 when the outer circle of the rotor sheet is a straight line cut edge on the q-axis. The horizontal axis is time, and the vertical axis is the motor cogging torque. Figure 4 As shown in the figure, the motor cogging torque waveform is greatly reduced when the outer circle of the rotor punching is cut by straight line compared to the rotor slice using a full circle. At the same time, the motor cogging torque reduction effect when the d-axis straight line cutting is used is equivalent to that when the q-axis straight line cutting is used.

[0062] Furthermore, the electronic device connects the endpoints of the outer circle cutting according to the outer circle cutting type to obtain the first target cutting, including: when the outer circle cutting type is arc cutting, the electronic device determines the auxiliary center of the arc cutting. The arc cutting includes the arc cutting corresponding to the acute angle and the arc cutting corresponding to the superior angle. With the auxiliary center of the arc cutting as the center, an arc trajectory is generated with the endpoints of the outer circle cutting as the starting and ending points. The endpoints of the outer circle cutting are connected according to the arc trajectory to obtain the first target cutting.

[0063] Furthermore, in the case where the arc line cutting edge is the arc line cutting edge corresponding to the acute angle, the auxiliary circle center is determined by the following method: by calculating R in -R in ×cosθ<L O′B ≤R in ×cosθ+R in Determine the auxiliary circle center. The auxiliary circle center is located on the y-axis and outside the outer circle of the rotor punching. in L is the outer radius of the rotor punching, θ is the first angle, and O' is the auxiliary center. O′B is the distance between the auxiliary circle center O′ and point B, and point B is the midpoint between the end points A and C of the outer circle tangent edge. The coordinates of point A are (-R in ×sinθ,R in ×cosθ), the coordinates of point C are (R in ×sinθ,R in × cosθ). O′B +L OB is the ordinate of the auxiliary circle center, and the abscissa of the auxiliary circle center is 0. In some embodiments, at L O′B =R in ×cosθ, that is, when the arc trajectory generated by the auxiliary center O′ and points A and C is symmetrical to the arc cut off by the straight line AC on the outer circle of the rotor punching, the effect of reducing the motor cogging torque is best.

[0064] Combination Figures 5 to 7 As shown, Figure 5It is a schematic diagram of the structure of a rotor punching sheet using arc cutting corresponding to an acute angle provided by an embodiment of the present disclosure. Figure 6 yes Figure 5 Enlarged schematic diagram of the structure at the cutting edge of the middle arc line. Figure 7 It is a schematic diagram comparing the results of the motor tooth torque using an arc line cutting edge corresponding to an acute angle provided by an embodiment of the present disclosure. Figure 5 In the figure, the coordinate system is constructed with the center O of the rotor punching as the origin, the horizontal axis is the x-axis, the vertical axis is the y-axis, and the vertical axis is also the d-axis of the rotor punching. When the outer circle cutting edge type is arc cutting edge, and the arc cutting edge is the arc cutting edge corresponding to the acute angle, point A and point C are symmetrical about the y-axis, and point B is the midpoint of the outer circle cutting edge end points A and C. The coordinates of point A are (-R in ×sinθ,R in ×cosθ), the coordinates of point C are (R in ×sinθ,R in ×cosθ). Where R in is the outer radius of the rotor punching. Then the coordinates of point B are (0, R in × cosθ). Figure 7 The figure includes the motor cogging torque waveform 1 when the outer circle of the rotor sheet is a full circle, the motor cogging torque waveform 4 when the outer circle of the rotor sheet is a circular arc line cutting edge corresponding to an acute angle on the d-axis, and the motor cogging torque waveform 3 when the outer circle of the rotor sheet is a straight line cutting edge on the q-axis. The horizontal axis is time, and the vertical axis is the motor cogging torque. Figure 7 As shown in , the motor cogging torque waveform is greatly reduced when the outer circle of the rotor punching is cut by arc line compared with the rotor slice using a full circle. At the same time, the motor cogging torque when the d-axis uses the arc line cutting corresponding to the acute angle is lower than the motor cogging torque when the q-axis uses the straight line cutting. Therefore, the motor cogging torque reduction effect is better when the d-axis uses the arc line cutting corresponding to the acute angle.

[0065] Furthermore, in the case where the arc tangent line is the arc tangent line corresponding to the reflex angle, the auxiliary circle center is determined by the following method: by calculating Determine the auxiliary circle center. The auxiliary circle center is located on the y-axis and is located at the rotor pole shoe portion of the rotor punching. in is the outer radius of the rotor punching, θ′ is the second angle. O” is the auxiliary center. The coordinates of the end point A′ of the outer cutting edge are (-R in ×sinθ′,R in ×cosθ′), the coordinates of the end point C′ of the outer circle tangent edge are (R in ×sinθ′,R in ×cosθ′). O”O is the ordinate of the auxiliary circle center, and the abscissa of the auxiliary circle center is 0. In some embodiments, In this case, the effect of reducing the motor cogging torque is best.

[0066] Combination Figure 8 and Fig. 9 As shown, Figure 8 It is a schematic structural diagram of a rotor punching sheet using an arc line cutting edge corresponding to the reflex angle provided by an embodiment of the present disclosure. Fig. 9 It is a schematic diagram comparing the results of the motor tooth torque using an arc line cutting edge corresponding to the reflex angle provided in an embodiment of the present disclosure. Figure 8 In the figure, the coordinate system is constructed with the center O of the rotor punch as the origin, the horizontal axis is the x-axis, the vertical axis is the y-axis, and the vertical axis is also the d-axis of the rotor punch. When the outer circle cutting edge type is the arc cutting edge corresponding to the reflex angle, the coordinate of the outer circle cutting edge endpoint A′ is (-R in ×sinθ′,R in ×cosθ′), the coordinates of the end point C′ of the outer circle tangent edge are (R in ×sinθ′,R in ×cosθ′). Among them, R in is the outer radius of the rotor punching, and θ′ is the second angle. Fig. 9 The figure includes the motor cogging torque waveform 1 when the outer circle of the rotor punching is a full circle, the motor cogging torque waveform 5 when the outer circle of the rotor punching is a circular arc line cutting edge corresponding to the reflex angle on the d-axis, and the motor cogging torque waveform 3 when the outer circle of the rotor punching is a straight line cutting edge on the q-axis. The horizontal axis is time, and the vertical axis is the motor cogging torque. Fig. 9 As shown in , the motor cogging torque waveform is greatly reduced when the outer circle of the rotor punching is cut by arc line compared with the rotor slice using a full circle. At the same time, the motor cogging torque when the d-axis uses the arc line cutting corresponding to the superior angle is lower than the motor cogging torque when the q-axis uses the straight line cutting. Therefore, the motor cogging torque reduction effect is better when the d-axis uses the arc line cutting corresponding to the superior angle

[0067] Combination Fig.10 As shown, Fig.10 It is a schematic diagram comparing the tooth slot torque results of the outer circle cutting edge of a rotor punching provided by an embodiment of the present disclosure. Fig.10 The figures include the motor cogging torque waveform 2 when the outer circle of the rotor sheet is cut by a straight line on the d-axis, the motor cogging torque waveform 4 when the outer circle of the rotor sheet is cut by a circular arc corresponding to an acute angle on the d-axis, and the motor cogging torque waveform 5 when the outer circle of the rotor sheet is cut by a circular arc corresponding to an apparent angle on the d-axis. It can be seen that the motor cogging torque is best reduced when the outer circle of the rotor sheet is cut by a circular arc corresponding to an apparent angle on the d-axis.

[0068] Furthermore, the electronic equipment motor core punching sheet includes a stator punching sheet, and after the rotor punching sheet is processed according to the first target trimming, it also includes: the electronic equipment determines the inner diameter arc trimming endpoint of the stator tooth shoe of the stator punching sheet. Taking the inner diameter arc trimming endpoint as the starting point, an extension line is made along the direction perpendicular to the preset d-axis to determine the first intersection and the second intersection with the stator tooth shoe. The first intersection and the second intersection are connected to obtain the second target trimming. The stator punching sheet is processed according to the second target trimming.

[0069] Furthermore, the electronic device determines the inner diameter arc trimming endpoint of the stator tooth shoe of the stator punching sheet, including: the electronic device calculates according to the third preset algorithm using the number of motor poles to obtain a third angle corresponding to the inner diameter arc trimming. The third angle is the angle between the third connecting line and the preset d-axis, and the third connecting line is the line between the inner diameter arc trimming endpoint and the outer circle center of the rotor punching sheet. The inner diameter arc trimming endpoint is determined according to the third angle corresponding to the inner diameter arc trimming.

[0070] Further, the electronic device calculates according to the third preset algorithm using the number of motor poles to obtain a third angle corresponding to the inner diameter arc cutting edge, including: the electronic device calculates Obtain the third angle corresponding to the inner diameter circular arc cutting edge. Wherein, β is the third angle, P is the number of motor poles, and z is the angle corresponding to the outer circular cutting edge type of the rotor punching. In some embodiments, when the outer circular cutting edge type of the rotor punching is a straight line cutting edge or an arc cutting edge corresponding to an acute angle, z=θ. When the outer circular cutting edge type of the rotor punching is an arc cutting edge corresponding to a reflex angle, z=θ′.

[0071] Optionally, when the third angle is β=θ, the stator tooth shoe cutting edge is adopted on the basis of the straight line cutting edge or the arc cutting edge corresponding to the acute angle on the outer circle of the rotor punching sheet. In this way, on the basis of the rotor punching sheet already adopting the cutting edge design, the cogging torque and torque pulsation can be better reduced, thereby achieving better noise reduction.

[0072] Optionally, when the third angle is β=2θ′, the stator tooth shoe cutting edge is adopted on the basis of the circular arc cutting edge corresponding to the superior angle of the outer circle of the rotor punching. In this way, on the basis of the rotor punching edge design, the cogging torque and torque pulsation can be better reduced, thereby achieving better noise reduction.

[0073] Furthermore, the electronic device determines the inner diameter arc cutting edge point according to the third angle corresponding to the inner diameter arc cutting edge, including: the electronic device determines the intersection of the third connecting line and the inner diameter arc of the stator punching sheet as the inner diameter arc cutting edge point.

[0074] Combination Fig.11 and Fig.12 As shown, Fig.11It is a structural schematic diagram of a stator tooth shoe cutting edge provided in an embodiment of the present disclosure. Fig.12 yes Fig.11 An enlarged schematic diagram of the structure at the cutting edge of the middle stator tooth shoe. Fig.11 In the case where the outer cutting edge type of the rotor punching is a straight cutting edge or an arc cutting edge corresponding to an acute angle, the outer cutting edge endpoints include point A and point C. Point B is the midpoint of the outer cutting edge endpoints A and C. The coordinates of point A are (-R in ×sinθ,R in ×cosθ), the coordinates of point C are (R in ×sinθ,R in ×cosθ). Where R in is the outer radius of the rotor punching. Then the coordinates of point B are (0, R in ×cosθ). The third angle β is equal to the first angle θ. The endpoints of the inner diameter arc cutting edge include point E and point F. The third connecting edge is OE, and the third angle β is the angle between OE and the y-axis. Among them, the preset d-axis is the y-axis. Taking the endpoint E of the inner diameter arc cutting edge as the starting point, make an extension line along the negative semi-axis direction perpendicular to the preset d-axis, that is, perpendicular to the y-axis to the x-axis. The intersection of the extension line and the stator tooth shoe is determined as the first intersection G. Taking the endpoint F of the inner diameter arc cutting edge as the starting point, make an extension line along the positive semi-axis direction perpendicular to the preset d-axis, that is, perpendicular to the y-axis to the x-axis. The intersection of the extension line and the stator tooth shoe is determined as the second intersection H.

[0075] Combination Fig.13 and Fig.14 As shown, Fig.13 It is a schematic diagram for comparing the tooth slot torque results using stator tooth shoe cutting provided by an embodiment of the present disclosure. Fig.14 It is another schematic diagram for comparing the tooth slot torque results using stator tooth shoe cutting provided by an embodiment of the present disclosure. Fig.13 The motor tooth slot torque waveform 4 includes the motor tooth slot torque waveform when the outer circle of the rotor punching sheet is cut by an arc line corresponding to an acute angle on the d axis and the motor tooth slot torque waveform 6 when the stator tooth shoe is cut on the basis of the outer circle of the rotor punching sheet being cut by an arc line corresponding to an acute angle. Fig.13 As shown in , when the stator tooth shoe trimming is used on the basis of the circular arc trimming corresponding to the acute angle on the outer circle of the rotor punching, the motor cogging torque and torque pulsation are greatly reduced compared with the case where only the circular arc trimming corresponding to the acute angle is used on the outer circle of the rotor punching. Therefore, the motor cogging torque and torque pulsation reduction effect is better when both the circular arc trimming corresponding to the acute angle and the stator tooth shoe trimming are used. Fig.14 The motor tooth slot torque waveform 5 includes the motor tooth slot torque waveform when the outer circle of the rotor punching is cut by the arc line corresponding to the reflex angle on the d axis and the motor tooth slot torque waveform 7 when the stator tooth shoe is cut on the basis of the outer circle of the rotor punching being cut by the arc line corresponding to the reflex angle. Fig.14As shown in , when the stator tooth shoe trimming is used on the basis of the circular arc trimming corresponding to the superior angle on the outer circle of the rotor punching, the motor cogging torque and torque pulsation are greatly reduced compared with the case where only the circular arc trimming corresponding to the superior angle is used on the outer circle of the rotor punching. Therefore, the motor cogging torque and torque pulsation reduction effect is better when the circular arc trimming corresponding to the superior angle and the stator tooth shoe trimming are used at the same time.

[0076] Combination Fig.15 As shown, an embodiment of the present disclosure provides a device 1500 for processing motor core punching sheets, including a processor (processor) 1504 and a memory (memory) 1501. Optionally, the device may also include a communication interface (Communication Interface) 1502 and a bus 1503. Among them, the processor 1504, the communication interface 1502, and the memory 1501 can communicate with each other through the bus 1503. The communication interface 1502 can be used for information transmission. The processor 1504 can call the logic instructions in the memory 1501 to execute the method for processing motor core punching sheets of the above embodiment.

[0077] By using the device for processing motor core punching sheets provided by the embodiment of the present disclosure, the number of motor poles and the type of outer circle cutting are obtained, and the outer circle cutting end points of the rotor punching sheets are determined according to the number of motor poles and the type of outer circle cutting. The outer circle cutting end points are connected according to the outer circle cutting type to obtain a first target cutting. The rotor punching sheets are processed according to the first target cutting. In this way, by processing the rotor punching sheets according to the first target cutting, when the motor uses the processed motor core punching sheets, the motor cogging torque and torque pulsation can be effectively reduced, thereby reducing the motor electromagnetic noise, and solving the problem of excessive noise during compressor operation.

[0078] In addition, the logic instructions in the above-mentioned memory 1501 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0079] The memory 1501 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 1504 executes the function application and data processing by running the program instructions / modules stored in the memory 1501, that is, the method for processing the motor core punching sheet in the above embodiment is implemented.

[0080] The memory 1501 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 1501 may include a high-speed random access memory and may also include a non-volatile memory.

[0081] Optionally, an embodiment of the present disclosure provides an electronic device, comprising: an electronic device body, and the above-mentioned device for processing motor core punchings. The device for processing motor core punchings is installed on the electronic device body. The installation relationship described here is not limited to placement inside the electronic device body, but also includes installation connections with other components of the electronic device body, including but not limited to physical connections, electrical connections or signal transmission connections, etc. Those skilled in the art can understand that the device for processing motor core punchings can be adapted to a feasible electronic device body, thereby realizing other feasible embodiments.

[0082] By using the electronic device provided by the embodiment of the present disclosure, the number of motor poles and the type of outer circle cutting are obtained, and the outer circle cutting end points of the rotor punching are determined according to the number of motor poles and the type of outer circle cutting. The outer circle cutting end points are connected according to the type of outer circle cutting to obtain a first target cutting. The rotor punching is processed according to the first target cutting. In this way, by processing the rotor punching according to the first target cutting, when the motor uses the processed motor core punching, the motor tooth slot torque and torque pulsation can be effectively reduced, thereby reducing the motor electromagnetic noise, and solving the problem of excessive noise when the compressor is running.

[0083] Optionally, the electronic device includes a computer or a server, etc.

[0084] An embodiment of the present disclosure provides a storage medium storing program instructions, which, when run, execute the above method for processing motor core punching sheets.

[0085] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned method for processing motor core punching sheets.

[0086] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0087] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0088] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0089] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0090] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0091] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for processing motor core punching sheets, characterized in that: The motor core punching sheet includes a rotor punching sheet, and the method includes: Get the number of motor poles and the type of outer circle cutting edge; Determine the outer circle cutting edge point of the rotor punching according to the number of motor poles and the outer circle cutting type; Connect the end points of the outer circle trimming according to the outer circle trimming type to obtain the first target trimming; The rotor laminations are processed according to the first target trimming.

2. The method according to claim 1, characterized in that Determine the outer circle cutting edge of the rotor punching according to the number of motor poles and the outer circle cutting type, including: When the outer circle cutting edge type is a straight line cutting edge or an arc cutting edge corresponding to an acute angle, the first angle is obtained by calculating the number of motor poles according to a first preset algorithm; the first angle is the angle between the first connecting line and the preset d-axis, and the first connecting line is the line between the end point of the outer circle cutting edge and the center of the outer circle of the rotor punching sheet; Obtain the outer radius of the rotor punching; The coordinates of the endpoints of the outer circle cutting edge are obtained by calculating the outer circle radius and the first angle according to a preset trigonometric function.

3. The method according to claim 1, characterized in that Determine the outer circle cutting edge of the rotor punching according to the number of motor poles and the outer circle cutting type, including: When the outer circle cutting edge type is the arc cutting edge corresponding to the reflex angle, the second angle is obtained by calculating the number of motor poles according to the second preset algorithm; the second angle is the angle between the second connecting line and the preset d-axis, and the second connecting line is the line between the end point of the outer circle cutting edge and the center of the outer circle of the rotor punching; Obtain the outer radius of the rotor punching; The coordinates of the endpoints of the outer circle cutting edge are obtained by calculating the outer circle radius and the second angle according to a preset trigonometric function.

4. The method according to claim 2, characterized in that: Connect the outer circle trimming end points according to the outer circle trimming type to obtain the first target trimming, including: When the outer circle trimming type is straight line trimming, the outer circle trimming end points are directly connected to obtain the first target trimming.

5. The method according to claim 2 or 3, characterized in that: Connect the outer circle trimming end points according to the outer circle trimming type to obtain the first target trimming, including: When the outer circle trimming type is arc trimming, determine the auxiliary center of the arc trimming; the arc trimming includes the arc trimming corresponding to the acute angle and the arc trimming corresponding to the reflex angle; The arc trajectory is generated with the auxiliary circle center of the arc line cutting edge as the center and the end points of the outer circle cutting edge as the starting and ending points; Connect the end points of the outer circle cutting edge according to the arc trajectory to obtain the first target cutting edge.

6. The method according to claim 1, characterized in that The motor core punching sheet includes a stator punching sheet, and after the rotor punching sheet is processed according to the first target trimming, it also includes: Determine the end point of the inner diameter arc cutting edge of the stator tooth shoe of the stator punching sheet; Taking the end point of the inner diameter arc cutting edge as the starting point, an extension line is drawn in a direction perpendicular to the preset d-axis to determine the first intersection point and the second intersection point with the stator tooth shoe; Connect the first intersection point and the second intersection point to obtain a second target cutting edge; The stator punching sheet is processed according to the second target trimming.

7. The method according to claim 6, characterized in that Determine the inner diameter arc cutting edge end point of the stator tooth shoe of the stator punching sheet, including: The third angle corresponding to the inner diameter arc cutting edge is obtained by calculating according to the third preset algorithm using the number of motor poles; the third angle is the angle between the third connecting line and the preset d-axis, and the third connecting line is the line between the end point of the inner diameter arc cutting edge and the center of the outer circle of the rotor punching sheet; The inner diameter arc cutting edge endpoint is determined according to the third included angle corresponding to the inner diameter arc cutting edge.

8. A device for processing motor core punching sheets, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for machining motor core punching sheets according to any one of claims 1 to 7 when running the program instructions.

9. An electronic device, characterized in that: include: Electronic device body; The device for processing motor core punching sheets as described in claim 8 is installed on the electronic equipment body.

10. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for processing motor core punching sheets as described in any one of claims 1 to 7 is executed.

Images