CN115882669B - Shaping method and device for winding end of two-pole motor - Google Patents
Shaping method and device for winding end of two-pole motor Download PDFInfo
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Abstract
The invention provides a shaping method and a shaping device for a winding end of a two-pole motor, which belong to the technical field of shaping of winding ends of motors, wherein the shaping method for the winding end of the two-pole motor is realized by the shaping device for the winding end of the two-pole motor, and comprises the following steps: establishing a database of motor parameters, pressure limits and height limits; selecting all data within an allowable difference range based on motor parameters of the motor to be shaped; estimating to obtain a pressure default value and a height default value through a two-dimensional Gaussian equation and a generalized least square method; determining a pressure set point and a height set point; detecting the current pressing pressure and the height of the motor winding end part; and controlling the air cylinder to press based on the pressure set value and the height set value to finish shaping the end part of the motor winding. The invention can efficiently shape the end part of the motor winding to a proper size, and realizes precise shaping.
Description
Technical Field
The invention relates to the technical field of motor winding end shaping, in particular to a shaping method and device for a two-pole motor winding end.
Background
In the motor manufacturing industry, for a two-pole motor, the stator winding end part is particularly enlarged, the end part size and shape are particularly difficult to control, the motor performance is easily affected by the excessively enlarged end part due to the excessively long end part size, the copper consumption is increased, the winding resistance is increased, and particularly, the distance between the end part and a machine base is too short after the physical space is tensioned, so that the electric breakdown fault is easily generated.
Therefore, there is a need for a method and apparatus for shaping the winding ends of a two-pole motor to solve the above-mentioned problems.
Disclosure of Invention
The invention provides a shaping method and device for winding end parts of a two-pole motor, which are used for accurately shaping the winding end parts of the motor.
An aspect of the embodiments of the present specification discloses a shaping method for winding end portions of a two-pole motor, including:
s1, establishing a database based on historical production data;
the database stores motor parameters and pressure limits and height limits corresponding to the motor parameters, wherein the motor parameters comprise parallel winding number, wire diameter, conductor number per slot, total slot number and stator core height;
s2, based on motor parameters of the motor to be shaped, taking the motor parameters as a central value, and selecting all data within an allowable difference range from the database;
s3, based on all the data selected in the S2, estimating to obtain a pressure default value and a height default value through a two-dimensional Gaussian equation and a generalized least square method;
s4, determining a pressure set value and a height set value based on the pressure default value and the height default value;
s5, detecting the current pressing pressure and the height of the end part of the motor winding through a pressure sensor and a displacement sensor;
s6, controlling the cylinder to press based on the difference value between the pressure set value and the detected pressing pressure and the difference value between the height set value and the detected motor winding end height, and finishing shaping of the motor winding end.
In one embodiment disclosed in the present specification, in S2, the allowable difference range of the number of parallel windings is ±1, the allowable difference range of the wire diameter is ±0.1mm, the allowable difference range of the number of conductors per slot is ±1, the allowable difference range of the total number of slots is ±1, and the allowable difference range of the stator core height is ±100mm.
In one embodiment disclosed in the present specification, in S3, the two-dimensional gaussian equation is:
after taking the logarithm, the method becomes:
Inf(p，h)＝b 0 +b 1 *p+b 2 *h+b 3 *p 2 +b 4 *h 2 ；
then:
Inf(p，h)＝[1，p，h，p 2 ，h 2 ]*[b 0 ，b 1 ，b 2 ，b 3 ，b 4 ] T ；
namely:
Z＝Inf(p，h)；
Z＝X*B；
X＝[1，p，h，p 2 ，h 2 ]；
B＝[b 0 ，b 1 ，b 2 ，b 3 ，b 4 ] T ；
wherein A is a coefficient, e is a natural base e, p and h are form parameters,
variance of p>
Is the variance of h, p0 is the pressure limit, h0 is the height limit, b 0 、b 1 、b 2 、b 3 、b 4 Z, X and B are all intermediate parameters;
after obtaining z=x×b through the two-dimensional gaussian equation, using a generalized least square method, and estimating to obtain a pressure default value Pa0 and a height default value Ha0 by taking a mean square error minimum as a target, wherein the formula is as follows:
assume that there are n sets of data:
Q＝min(∑(X i *B i -Z i ) 2 )；
Y＝[X 1 ，X 2 ...X n ] T ；
F＝[Z 1 ，Z 2 ...Z n ] T ；
then a B estimate is obtained, b= (Y T *Y) -1 *Y T *F；
Pa0＝-b 1 /(2*b 3 )，Ha0＝-b 2 /(2*b 4 )；
Wherein Q is an objective function with minimum mean square error, X i 、B i 、Z i 、Y、F、X 1 、X 2 ...X n 、Z 1 、Z 2 ...Z n Are all intermediate parameters.
In one embodiment disclosed in the present specification, in S6, when the detected motor winding end height is equal to the height set value, motor winding end shaping is completed.
In one embodiment disclosed in the present specification, in S6, when the detected pressing pressure is equal to the pressure set value, the motor winding end shaping is completed.
In one embodiment disclosed in the present specification, in S6, when the detected height of the motor winding end is greater than the height set point, the detected pressing pressure is less than the pressure set point, pressing is continued until the motor winding end height is equal to the height set point, or the pressing pressure is equal to the pressure set point, and the motor winding end shaping is completed.
In one embodiment disclosed in the present specification, in S6, after finishing shaping the motor winding end, the pressing pressure detected at the time of completion and the motor winding end height, and the motor parameters of the shaping are entered together into the database to update the database.
Another aspect of the embodiments of the present specification discloses a two-pole motor winding end shaping device comprising:
the non-outgoing line sleeve die is arranged at the non-outgoing line end part of the stator core;
the lead-out wire sleeve die is arranged at the end part of the lead-out wire of the stator core;
the two outer covers are symmetrically arranged at two outer sides of the stator core to straighten the non-outgoing line sleeve die and the outgoing line sleeve die;
the two compressing cylinders are arranged on one sides of the two outer covers, which are away from the stator core, so as to compress the outer covers;
the pressing cylinder is arranged above the outgoing line sleeve die so as to press;
the pressure sensor is arranged between the end part of the outgoing line and the outgoing line sleeve die so as to detect the pressing pressure;
the displacement sensor is arranged at the top end of the outgoing line sleeve die so as to detect the height of the end part of the motor winding;
and the control device is connected with the pressure sensor, the displacement sensor, the compression cylinder and is used for executing the shaping method of the winding end part of the two-pole motor.
In one embodiment disclosed in the specification, a coil root finger guard is arranged at the root of the winding of the stator core.
In one embodiment disclosed in the specification, the control device comprises a micro control unit and a touch screen, wherein the micro control unit is connected with the pressure sensor, the displacement sensor, the compression cylinder and the touch screen.
The embodiment of the specification can at least realize the following beneficial effects:
1. according to the shaping method of the winding end part of the two-pole motor, a database is firstly established, then appropriate historical production data can be selected according to motor parameters of the motor to be shaped, based on the selected historical production data, a pressure default value and a height default value are obtained through estimation by taking a mean square error minimum as a target through a two-dimensional Gaussian equation and a generalized least square method, a user can directly use the pressure default value and the height default value or perform appropriate modification based on the pressure default value and the height default value, and then a pressure set value and a height set value are determined; after the pressure set value and the height set value are determined in such a way, the pressure set value and the height set value are adopted for pressing subsequently, and when the detected pressing pressure reaches the pressure set value or the detected motor winding end reaches the height set value, the shaping is completed, so that the motor winding end can be shaped to a proper size effectively, and the accurate shaping is realized.
2. The shaping device of the winding end of the two-pole motor is used for executing the shaping method of the winding end of the two-pole motor; the two outer covers, the non-outgoing line sleeve die and the outgoing line sleeve die are sequentially compressed by the two compression cylinders, so that the subsequent compression cylinders can conveniently compress; the pressure sensor detects pressing pressure, the displacement sensor detects the height of the motor winding end, the control device receives detection data of the pressure sensor and the displacement sensor, the pressing cylinder is controlled to press, and when the detected pressing pressure reaches a pressure set value or the detected height of the motor winding end reaches a height set value, shaping is completed, so that accurate shaping is realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram illustrating steps of a method for shaping winding overhangs in a two-pole motor according to some embodiments of the invention.
Fig. 2 is a flow chart of a method of shaping winding overhangs of two-pole motors according to some embodiments of the invention.
Fig. 3 is a schematic diagram of a two-pole motor winding end shaping apparatus according to some embodiments of the present invention.
Fig. 4 is an enlarged partial schematic view at a in fig. 3.
Fig. 5 is a schematic view of the structure of the hold-down cylinder and housing involved in some embodiments of the present invention.
Fig. 6 is a schematic diagram of a control device according to some embodiments of the present invention.
Reference numerals:
1. a stator core; 11. an end of the lead wire; 12. a non-lead end;
2. a non-lead-out wire sleeve die; 21. a non-lead-out upper die; 22. a lower die of the non-outgoing line;
3. sleeving a lead-out wire; 31. an outgoing line outer die; 32. an outgoing line internal mold;
4. a compacting cylinder; 5. an outer cover; 6. a pressing cylinder; 7. protecting the finger at the root of the coil; 8. a displacement sensor; 9. a pressure sensor.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships conventionally placed in use of the product of the present invention, or orientations or positional relationships conventionally understood by those skilled in the art, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Furthermore, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides a shaping method for winding end of a two-pole motor according to an aspect of the embodiment of the present specification, including:
s1, establishing a database of the number of parallel windings, the wire diameter, the number of conductors per slot, the total slot number, the height of the stator core, the pressure limit and the height limit based on historical production data.
In the database, the number of windings G0, the wire diameter G1, the number of conductors G2 per slot, the total number of slots G3, the height G4 of the stator core and the pressure limit p 0 And a height limit h 0 One-to-one correspondence is established, that is, a database { G0, G1, G2, G3, G4, p0, h0} is determined based on the parallel winding number G0, the wire diameter G1, the number of conductors per slot G2, the total number of slots G3, the stator core height G4, and the height limit h 0.
S2, based on motor parameters of the motor to be shaped, taking the motor parameters as a central value, and selecting all data (N point data) within an allowable difference range from a database.
In the step, the allowable difference range of the parallel winding number is +/-1, the allowable difference range of the wire diameter is +/-0.1 mm, the allowable difference range of the conductor number of each slot is +/-1, the allowable difference range of the total slot number is +/-1, and the allowable difference range of the height of the stator core is +/-100 mm.
The user inputs motor parameters of the motor to be shaped: the parallel winding root number a0, the wire diameter a1, the conductor number a2 of each slot, the total slot number a3, the stator core height a4 and the like, taking a motor parameter as a central value, selecting all the parallel winding root numbers G0 within the range of a0+/-1, selecting all the wire diameters G1 within the range of a1+/-0.1 mm, selecting all the conductor numbers G2 of each slot within the range of a2+/-1, selecting all the total slot numbers G3 within the range of a3+/-1, selecting all the stator core heights G4 within the range of a4+/-100 mm, selecting corresponding pressure limits p0 and height limits h0, and finally obtaining N point data { G0 i ，G1 i ，G2 i ，G3 i ，G4 i ，p0 i ，h0 i }。
S3, based on all the data selected in the S2, estimating and obtaining a pressure default value and a height default value by using a two-dimensional Gaussian equation and a generalized least square method and taking the minimum mean square error as a target.
In this step, the two-dimensional gaussian equation is:
after taking the logarithm, the method becomes:
Inf(p，h)＝b 0 +b 1 *p+b 2 *h+b 3 *p 2 +b 4 *h 2 ；
then:
Inf(p，h)＝[1，p，h，p 2 ，h 2 ]*[b 0 ，b 1 ，b 2 ，b 3 ，b 4 ] T ；
namely:
Z＝Inf(p，h)；
Z＝X*B：
X＝[1，p，h，p 2 ，h 2 ]；
B＝[b 0 ，b 1 ，b 2 ，b 3 ，b 4 ] T ；
wherein A is a coefficient, e is a natural base e, p and h are form parameters,
variance of p>
Is the variance of h, p0 is the pressure limit, h0 is the height limit, b 0 、b 1 、b 2 、b 3 、b 4 Z, X and B are all intermediate parameters;
after obtaining z=x×b through the two-dimensional gaussian equation, that is, the solution problem becomes a binary quadratic polynomial fitting problem, using a generalized least square method, and taking the minimum mean square error of N-point data as a target, the formula is as follows:
assume that there are n sets of data:
Q＝min(∑(X i *B i -Z i ) 2 )；
Y＝[X 1 ，X 2 ...X n ] T ；
F＝[Z 1 ，Z 2 ...Z n ] T ；
then a B estimate is obtained, b= (Y T *Y) -1 *Y T *F；
Pa0＝-b 1 /(2*b 3 )，Ha0＝-b 2 /(2*b 4 )；
Wherein Q is an objective function with minimum mean square error, X i 、B i 、Z i 、Y、F、X 1 、X 2 ...X n 、Z 1 、Z 2 ...Z n Are all intermediate parameters;
the above intermediate parameters are all for simplifying the formula.
Meanwhile, the mean value and the variance of the N point data can be calculated and obtained for reference of a user.
The mean value is: pva 0= Σp0 i ；Hva0＝∑h0 i ；
The variance is: sigma (p 0) i -Pva0) 2 ；∑(h0 i -Hva0) 2 。
Examples are as follows:
σ p ＝8，σ h central value of p 0=5, central value of h 0=10, central value of h 0=20, data are as follows:
F＝[2.302585093,2.397895273,2.890371758,2.63905733；2.564949357,2.890371758,2.564949357,2.944438979；2.48490665，2.397895273,2.302585093,2.833213344；2.772588722,2.564949357,2.890371758,2.772588722；2.63905733，2.944438979]；
Y＝[1,40.55690059,53.90316436,714.3545705,1261.864822；1,35.78144703,58.26655577,533.9315549,1415.821433；1,29.81034473,64.68520987,307.454102,1447.625678；1,26.89396716,64.26070587,274.0696314,1564.739907；1,31.26933412,62.19413584,381.2048972,1508.06507；1,31.63071952,65.05161601,346.1500808,1464.072133；1,43.43115946,56.0395723,735.400723,1224.364783；1,34.89144098,61.7679523,413.4616688,1295.757853；1,31.63109601,61.95907264,402.6413769,1544.897746；1,36.29822104,58.78542833,549.4655524,1441.149921；1,40.56936144,53.26215656,714.7936,1232.031481；1,30.25078634,65.28454719,322.9937047,1504.324449；1,39.46082148,60.94596881,561.6254656,1339.690623；1,42.21599228,56.42410178,694.8246362,1241.224998；1,33.7252222,62.67135034,393.510146,1358.890303；1,28.59497366,64.09388252,294.9130219,1481.657104；1,40.18089995,60.08524799,611.7732656,1368.002501；1,33.86491865,63.24148575,389.4910791,1358.318358]；
according to the formula:
B＝(Y T *Y) -1 *Y T *F；
then: b= [0.2350,0.0107,0.0784, -0.0005, -0.0018];
Pa0＝11.4239,Ha0＝21.9082；
Pva0＝13.36，Hva0＝22.93。
s4, determining a pressure set value and a height set value based on the pressure default value and the height default value.
In this step, the user may directly use the pressure default value and the height default value as the pressure setting value and the height setting value, or may determine the pressure setting value and the height setting value after modifying the mean and the variance of the N-point data with reference to the pressure default value, the height default value, and the pressure default value.
S5, detecting the current pressing pressure and the motor winding end height through the pressure sensor 9 and the displacement sensor 8.
In this step, the mounting positions of the pressure sensor 9 and the displacement sensor 8 may be referred to in the existing scheme or the scheme of the embodiment described below, and only detection of the pressing pressure and the motor winding end height needs to be achieved.
S6, controlling the air cylinder to press based on the difference value between the pressure set value and the detected pressing pressure and the difference value between the height set value and the detected motor winding end height, and finishing shaping of the motor winding end.
In this step, the motor winding end shaping is completed when the detected pressing pressure is equal to the pressure set value, or the motor winding end shaping is completed when the detected motor winding end height is equal to the height set value.
After finishing shaping the motor winding end, recording the pressing pressure detected during finishing and the motor winding end height and motor parameters of the shaping together into a database so as to update the database; as the database is updated, the accuracy of the subsequent shaping of the winding ends of the two-pole motor becomes higher and higher.
As shown in fig. 3, 4 and 5, another aspect of the embodiments of the present specification discloses a two-pole motor winding end shaping device, including:
a non-lead-out wire sleeve die 2 arranged at a non-lead-out wire end 12 of the stator core 1;
the lead wire sleeve die 3 is arranged at the lead wire end 11 of the stator core 1;
the two outer covers 5 are symmetrically arranged at two outer sides of the stator core 1 to straighten the non-outgoing line sleeve die 2 and the outgoing line sleeve die 3;
the two compressing cylinders 4 are arranged on one side of the two outer covers 5, which is far away from the stator core 1, so as to compress the outer covers 5;
the pressing cylinder 6 is arranged above the lead-out wire sleeve die 3 so as to press;
a pressure sensor 9 provided between the lead-out wire end 11 and the lead-out wire sleeve die 3 to detect pressing pressure;
the displacement sensor 8 is arranged at the top end of the outgoing line sleeve die 3 to detect the height of the end part of the motor winding;
and the control device is respectively connected with the pressure sensor 9, the displacement sensor 8, the compacting cylinder 4 and the compacting cylinder 6 and is used for executing the shaping method of the winding end part of the two-pole motor.
In some embodiments, the winding root of the stator core 1 is provided with coil root fingers 7. The coil root guard finger 7 is used as a guard finger structure for shaping the root of the inter-tooth winding for protecting the root of the winding.
In some embodiments, the control device comprises a micro-control unit and a touch screen, wherein the micro-control unit is respectively connected with the pressure sensor 9, the displacement sensor 8, the pressing cylinder 4, the pressing cylinder 6 and the touch screen.
It is clear that, as shown in fig. 6, the user can input related instructions, such as motor parameters, or the above-mentioned respective data, parameters, etc., such as the speed (pressure) of the pressing cylinder 6, a database, a pressure default value, a height default value, a pressure set value, and a height set value, to the Micro Control Unit (MCU) through the touch screen. The 220V power supply supplies power to the MCU, the transmitter, the pressure sensor 9 and the displacement sensor 8 through the circuit breaker and the 24V power supply, and the 220V power supply directly supplies power to the compression cylinder 4 and the compression cylinder 6 through the circuit breaker.
The compressing cylinder 4, the compressing cylinder 6, the displacement sensor 8, the pressure sensor 9, the touch screen and the micro control unit are all existing devices, and the purpose of the invention is achieved only by utilizing the functions of the compressing cylinder, the compressing cylinder 6, the displacement sensor 8, the pressure sensor 9 and the micro control unit, for example, the displacement sensor 8 is utilized to have a distance measuring function, the compressing height of the motor winding end part during compressing (namely displacement) is directly or indirectly detected, namely, the actual installation position of the displacement sensor 8 can be set according to the actual situation, and the compressing device is not limited to the position recorded by the invention, and only the height detection of the motor winding end part can be achieved.
The control device also comprises a memory and a computer program which is stored in the memory and can run on the micro control unit, and when the micro control unit executes the computer program, the shaping method of the winding end part of the two-pole motor is realized.
It should be understood that the lead wire sleeve mold 3 includes a lead wire inner mold 32 and a lead wire outer mold 31, and the lead wire inner mold 32 and the lead wire outer mold 31 are cooperatively placed at the upper end of the stator core 1; the non-outgoing line sleeve die 2 comprises a non-outgoing line lower die 22 and a non-outgoing line upper die 21, and the non-outgoing line lower die 22 and the non-outgoing line upper die 21 are connected and then are arranged at the lower end of the stator core 1 to serve as pressure bearing supports. The specific structures of the lead-out inner die 32, the lead-out outer die 31, the non-lead-out lower die 22 and the non-lead-out upper die 21 are all existing schemes, namely the specific structures of the lead-out inner die 32, the lead-out outer die 31, the non-lead-out lower die 22 and the non-lead-out upper die 21 are determined by the shape structures of the stator core 1 and the non-lead-out end 12 and the lead-out end 11 thereof. The shape of the non-lead end part can be ensured to be round, and the compressed height can be ensured; the lead ends are ensured to be shaped and then connected, the 2Y star points are symmetrically and uniformly distributed, and two paths of lead out are led out; the molding requirement is ensured, and the coil end is protected from damage.
The shaping process is as follows:
the displacement sensor 8 is provided on the top end surface of the lead-out wire outer die 31, and the pressure sensor 9 is provided at a position between the top end of the lead-out wire end portion 11 and the inner side surface of the lead-out wire inner die 32, and is fixed to the inner side surface of the lead-out wire inner die 32.
S1-S4 of a shaping method of winding end parts of the two-pole motor are executed, and a pressure set value p1 and a height set value h1 are determined; taking the bottom end face of the coil root finger 7 on the winding root as a reference point, the height of the lead-out outer die 31 (the distance (vertical height) between the top end face of the lead-out outer die 31 and the bottom end face of the coil root finger 7) is D, the height of the coil root finger 7 is D1, the distance (vertical height) between the top end face of the lead-out inner die 32 and the pressure sensor 9 is D2, and the initial distance from the top end face of the lead-out outer die 31 to the top end face of the lead-out inner die 32 is D0, i.e., the initial height (detection height) of the motor winding end is h=d-D1-D2-D0, which is shown in fig. 4. The pressure sensor 9 is always in contact with the top end of the outgoing line end portion 11 and the inner side face of the outgoing line internal mold 32, so that detection is more accurate.
The assembly process between the lead wire sleeve mold 3 and the non-lead wire sleeve mold 2 and the stator core 1 is referred to the existing scheme, and will not be repeated here, and in the same way, after assembly, the lead wire sleeve mold 3 and the non-lead wire sleeve mold 2 can be compressed on the stator core 1 through the two compressing cylinders 4 and the two outer covers 5.
Then, according to the difference value between the initial height h and the height set value h1, calculating the pushing speed of the pressing cylinder 6, and then driving the pressing cylinder 6 according to the pushing speed, wherein the pressing cylinder 6 is downwards pressed to the lead-out inner die 32, the lead-out inner die 32 downwards presses the lead-out end 11, and the lead-out end 11 is compressed by pressure; in the process, the displacement sensor 8 continuously detects d0, the height h is redetermined, the value of h-h1 is redetermined, the pushing speed of the pressing cylinder 6 is redetected, and the larger the difference value is, the faster the speed is, and the slower the speed is, otherwise, the lower the pushing speed of the pressing cylinder 6 is; meanwhile, the pressure sensor 9 can also continuously detect the pressing pressure p, and when p is smaller than p1 and h is larger than h1, pressing is continued; and when p is more than or equal to p1 or h is less than or equal to h1, stopping pressing the cylinder 6, stopping pressing, recording p, h and the propulsion speed, recording the parameters of the motor input at the time together with the parameters of the motor, and finishing shaping. As shown in fig. 1 and 2.
In normal conditions, since the displacement sensor 8 and the pressure sensor 9 will constantly detect, when p=p1 or h=h1, the pressing will stop, i.e. at the end p will not be greater than p1 and h will not be greater than h1. I.e. if h > h1, the pressing is continued without the pressing pressure exceeding the pressure set point p 1; if p.gtoreq.p1, the pressing is stopped immediately, and at this time, h may be greater than h1.
In summary, a plurality of specific embodiments of the present invention are disclosed, and under the condition of no paradox, each embodiment may be freely combined to form a new embodiment, that is, embodiments belonging to alternative schemes may be freely replaced, but cannot be mutually combined; embodiments not belonging to the alternatives can be combined with each other, and these new embodiments also belong to the essential content of the invention.
While the above examples describe various embodiments of the present invention, those skilled in the art will appreciate that various changes and modifications can be made to these embodiments without departing from the spirit and scope of the present invention, and that such changes and modifications fall within the scope of the present invention.
Claims (10)
1. A method of shaping the winding ends of a two-pole motor, comprising:
s1, establishing a database based on historical production data;
the database stores motor parameters and pressure limits and height limits corresponding to the motor parameters, wherein the motor parameters comprise parallel winding number, wire diameter, conductor number per slot, total slot number and stator core height;
s2, based on motor parameters of the motor to be shaped, taking the motor parameters as a central value, and selecting all motor parameters within an allowable difference range and corresponding pressure limits and height limits in the database;
s3, estimating and obtaining a pressure default value and a height default value through a two-dimensional Gaussian equation and a generalized least square method based on all the motor parameters selected in the S2 and the corresponding pressure limit and height limit;
s4, determining a pressure set value and a height set value based on the pressure default value and the height default value;
s5, detecting the current pressing pressure and the height of the end part of the motor winding through a pressure sensor and a displacement sensor;
s6, controlling the cylinder to press based on the difference value between the pressure set value and the detected pressing pressure and the difference value between the height set value and the detected motor winding end height, and finishing shaping of the motor winding end.
2. The two-pole motor winding end shaping method according to claim 1, characterized in that:
in S2, the allowable difference range of the parallel winding number is +/-1, the allowable difference range of the wire diameter is +/-0.1 mm, the allowable difference range of the conductor number of each slot is +/-1, the allowable difference range of the total slot number is +/-1, and the allowable difference range of the height of the stator core is +/-100 mm.
3. The two-pole motor winding end shaping method according to claim 1, characterized in that:
in S3, the two-dimensional gaussian equation is:
after taking the logarithm, the method becomes:
Inf(p，h)＝b 0 +b 1 *p+b 2 *h+b 3 *p 2 +b 4 *h 2 ；
then:
Inf(p，h)＝[1，p，h，p 2 ，h 2 ]*[b 0 ，b 1 ，b 2 ，b 3 ，b 4 ] T ；
namely:
Z＝Inf(p，h)；
Z＝X*B；
X＝[1，p，h，p 2 ，h 2 ]；
B＝[b 0 ，b 1 ，b 2 ，b 3 ，b 4 ] T ；
wherein A is a coefficient, e is a natural base e, p and h are form parameters,
variance of p>
Is the variance of h, p0 is the pressure limit, h0 is the height limit, b 0 、b 1 、b 2 、b 3 、b 4 Z, X and B are all intermediate parameters;
after obtaining z=x×b through the two-dimensional gaussian equation, using a generalized least square method, and estimating to obtain a pressure default value Pa0 and a height default value Ha0 by taking a mean square error minimum as a target, wherein the formula is as follows:
assume that there are n sets of data:
Q＝min(∑(X i *B i -Z i ) 2 )；
Y＝[X 1 ，X 2 …X n ] T ；
F＝[Z 1 ，Z 2 …Z n ] T ；
then a B estimate is obtained, b= (Y T *Y) -1 *Y T *F；
Pa0＝-b 1 /(2*b 3 )，Ha0＝-b 2 /(2*b 4 )；
Wherein Q is an objective function with minimum mean square error, X i 、B i 、Z i 、Y、F、X 1 、X 2 ...X n 、Z 1 、Z 2 ...Z n Are all intermediate parameters.
4. The two-pole motor winding end shaping method according to claim 1, characterized in that:
in S6, when the detected motor winding end height is equal to the height set value, motor winding end shaping is completed.
5. The two-pole motor winding end shaping method according to claim 1, characterized in that:
in S6, when the detected pressing pressure is equal to the pressure set value, the motor winding end shaping is completed.
6. The two-pole motor winding end shaping method according to claim 1, characterized in that:
in S6, when the detected motor winding end height is greater than the height set point and the detected pressing pressure is less than the pressure set point, continuing pressing until the motor winding end height is equal to the height set point or the pressing pressure is equal to the pressure set point, and finishing shaping the motor winding end.
7. The two-pole motor winding end shaping method according to claim 1, characterized in that:
in S6, after finishing the shaping of the motor winding end, the pressing pressure detected at the time of finishing and the motor winding end height, and the motor parameters of the shaping are entered together into the database to update the database.
8. A two-pole motor winding end shaping device, comprising:
the non-outgoing line sleeve die is arranged at the non-outgoing line end part of the stator core;
the lead-out wire sleeve die is arranged at the end part of the lead-out wire of the stator core;
the two outer covers are symmetrically arranged at two outer sides of the stator core to straighten the non-outgoing line sleeve die and the outgoing line sleeve die;
the two compressing cylinders are arranged on one sides of the two outer covers, which are away from the stator core, so as to compress the outer covers;
the pressing cylinder is arranged above the outgoing line sleeve die so as to press;
the pressure sensor is arranged between the end part of the outgoing line and the outgoing line sleeve die so as to detect the pressing pressure;
the displacement sensor is arranged at the top end of the outgoing line sleeve die so as to detect the height of the end part of the motor winding;
control means, connected to the pressure sensor, displacement sensor, hold-down cylinder and hold-down cylinder, for performing the two-pole motor winding end shaping method according to any one of claims 1 to 7.
9. The two-pole motor winding end shaping device according to claim 8, wherein a winding root of the stator core is provided with a coil root finger guard.
10. The two-pole motor winding end shaping device according to claim 8, wherein the control device comprises a micro control unit and a touch screen, the micro control unit being connected with the pressure sensor, the displacement sensor, the compaction cylinder and the touch screen.
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| CN115882669A (en) | 2023-03-31 |
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Inventor after: Lin Hua Inventor after: Fu Qiang Inventor after: Deng Hongsheng Inventor after: Li Cong Inventor after: Zhang Hengjing Inventor after: Li Jingxin Inventor after: Lu Min Inventor after: Wang Jian Inventor before: Lin Hua Inventor before: Lu Min Inventor before: Fu Qiang Inventor before: Deng Hongsheng Inventor before: Wang Jian Inventor before: Zhang Hengjing |