CN102570738B - Method for determining parameters of hard coil winding of AC motor - Google Patents

Method for determining parameters of hard coil winding of AC motor Download PDF

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CN102570738B
CN102570738B CN 201210002431 CN201210002431A CN102570738B CN 102570738 B CN102570738 B CN 102570738B CN 201210002431 CN201210002431 CN 201210002431 CN 201210002431 A CN201210002431 A CN 201210002431A CN 102570738 B CN102570738 B CN 102570738B
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coil
hypotenuse
angle
calculated
length
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CN102570738A (en
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李训虎
管风
吴永林
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Chengdu CRRC Motor Co Ltd
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Abstract

The invention discloses a method for determining parameters of a hard coil winding of an AC motor, which completely adopts an actual spatial geometrical model for calculation to avoid errors caused by a simplified model and simultaneously takes the requirement for spatial deformation of a coil into consideration to provide a spatial deformation gap length. An algorithm with higher precision is adopted in numerical calculation to solve the problem of complicated calculation caused by exact solution, and meanwhile, the engineering requirements are fully satisfied. The invention has the benefits that the coil calculation model is based on a novel 3D spatial geometrical model, and the equivalent helix calculation with higher precision is adopted to solve the problems that the axial length is long and the gap design is inaccurate after original calculation; and besides, time consumption is low because diagram drawing is not needed, so that the design requirements of a conventional motor are better met, and the method can be better used for electric engineering design.

Description

The hard winding coil determination method for parameter of alternating current machine
Technical field
The present invention relates to the hard winding coil determination method for parameter of alternating current machine.
Background technology
Require day by day in design of electrical motor now under the situation of compact and small-volume large-power, existing computation model and method flow be based on substantially Xiangtan Electrical Machinery Plant and last section computation model and the method in the 's, 70, its calculation process is as follows:
(1) at first determines the groove span of each coil on motor, determine coil insulation structure and the levels limit position in groove.
(2) set the end winding gap.
(3) calculate upper coil hypotenuse opening angle partly.
(4) obtain the distance on hypotenuse average length, coil height and both sides with graphing method.
(5) calculate hypotenuse effective length and expansion length partly.
(6) calculate average turn length, length overall and shuttle molded dimension.
Above-mentioned computation model and method can not meet the demands, mainly contain following deficiency:
Calculating is based on two dimension view and mapping is calculated, and is extremely loaded down with trivial details, consuming time very long, and be a kind of approximate calculation; Two dimension view can not reflect the length variations of three-dimensional space curve effectively; Part is calculated and is based on long term experience, and result of calculation and calculating people's experience has much relations; Shuttle winding mold type can not fully reflect actual coil size relationship and deformation relationship.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, the invention provides the hard winding coil determination method for parameter of a kind of alternating current machine, adopt actual model space geometric to calculate fully, stopped the error that simplified model brings; Consider the requirement of coil space distortion simultaneously, provided the geometric distortion gap length; Adopt the higher algorithm of precision in the numerical computations, avoided the problem of the calculation of complex that exact solution brings, also can satisfy requirement of engineering fully simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: the hard winding coil determination method for parameter of a kind of alternating current machine comprises the steps:
The coil parameter that the first step, collection motor require comprises: the upper coil initial diameter
Figure 963253DEST_PATH_IMAGE002
, upper coil stops diameter , the upper coil angle
Figure 128972DEST_PATH_IMAGE006
, the angle that the deflection of upper coil nose reduces
Figure 678509DEST_PATH_IMAGE008
, upper coil end center distance L1, the subtended angle on limit, upper strata
Figure 430564DEST_PATH_IMAGE010
1, limit, upper strata nose bent angle
Figure 439978DEST_PATH_IMAGE010
2; The inner coil initial diameter
Figure 644694DEST_PATH_IMAGE012
, inner coil stops diameter
Figure 532010DEST_PATH_IMAGE014
, the inner coil angle
Figure 138571DEST_PATH_IMAGE016
, the angle that the deflection of inner coil nose reduces
Figure 318886DEST_PATH_IMAGE018
, inner coil end center distance L2, the subtended angle on lower floor limit
Figure 10898DEST_PATH_IMAGE010
3, lower floor's limit nose bent angle 4; Number of stator slots Q1, the upper coil radius of corner R1 from the straightway to the hypotenuse, the radius of corner R2 of upper coil from the hypotenuse to the nose, the radius of corner R3 of inner coil from the straightway to the hypotenuse, the radius of corner R4 of inner coil from the hypotenuse to the nose, nose center line radius of curvature R 5, straight line segment length
Figure 487940DEST_PATH_IMAGE020
Second the step, utilize the equivalent circular cylindrical helix, spatially calculate the subtended angle of limit, upper strata hypotenuse
Figure 511259DEST_PATH_IMAGE022
, launch long L3 and axial long L4;
The 3rd the step, utilize the equivalent circular cylindrical helix, spatially calculate the subtended angle of lower floor's limit hypotenuse
Figure 690568DEST_PATH_IMAGE024
, launch long
Figure 654107DEST_PATH_IMAGE026
With axial length
Figure 235261DEST_PATH_IMAGE028
The 4th step, the expansion of calculating fillet everywhere are long
Figure 757378DEST_PATH_IMAGE030
,
Figure 423983DEST_PATH_IMAGE032
The 5th step, calculating nose length
Figure 200002DEST_PATH_IMAGE034
, total launch long
Figure 635662DEST_PATH_IMAGE036
With line shaft to length
Figure 594260DEST_PATH_IMAGE038
The 6th step, employing shuttle winding mold type calculate the size of fusiformis model;
The 7th step, the coil that will not wrap lie on the ground, and the slotted line nose is to the height on ground.
When the 6th step, described employing shuttle winding mold type calculated the size of fusiformis model, the trapezoidal value that goes up bottom chamfer equals not insulated coil radial height sum of R1 and 1/2nd, around with coil molding the time, repeat bending with the same section of avoiding coil at shuttle, cause insulation damages.
When the 6th step, described employing shuttle winding mold type calculated the size of fusiformis model, insulated coil radial height is not carried out segmentation calculate, accurately obtain the length of trapezoidal each limit and each arc, make error accumulation to the trapezoidal hypotenuse length of straigh line.
When the 6th step, described employing shuttle winding mold type calculated the size of fusiformis model, the trapezoidal angle number of degrees of going to the bottom of hypothesis utilized segmentation to calculate and obtain trapezoidal all sized datas earlier, calculate trapezoidal hypotenuse straight line segment length; Simultaneously, deduct trapezoidal correlation length with the single turn length overall of coil, obtain trapezoidal hypotenuse straight line segment length; Relatively the difference of two kinds of computing methods is supposed the trapezoidal angle number of degrees of going to the bottom again, until the difference of two kinds of computing methods less than 0.1.
Compared with prior art, good effect of the present invention is: the coil computation model is based on new solid space geometrical model, adopts the equivalent helix of degree of precision to calculate, and having solved former calculating, to finish the axial length in back long, the coarse problem of gap design; And it goes without doing figure, consuming time very short, satisfied the designing requirement of existing motor preferably, have preferably in electrical engineering design and use.
Embodiment
The inventive method adopts the spatial model of coil centerline, and coil former is divided into straightway, and limit, upper strata oblique line section, lower floor's limit oblique line section, nose, fillet part are carried out the space respectively and calculated.
To the trochoid spiral line computation of oblique line section, adopt the line computation of equivalent cylindrical surface helix, both simplified computational process, also meet the requirement of engineering.
The present invention adopts shuttle winding mold type, considers the demand adjustment model size of winding deformation.
The inventive method detailed step is as follows:
The coil parameter that the first step, collection motor require comprises:
The upper coil initial diameter
Figure 482582DEST_PATH_IMAGE002
, upper coil stops diameter , the upper coil angle
Figure 343670DEST_PATH_IMAGE006
, the angle that the deflection of upper coil nose reduces
Figure 473168DEST_PATH_IMAGE008
, upper coil end center distance L1; The inner coil initial diameter
Figure 848786DEST_PATH_IMAGE012
, inner coil stops diameter
Figure 954889DEST_PATH_IMAGE014
, the inner coil angle
Figure 365142DEST_PATH_IMAGE016
, the angle that the deflection of inner coil nose reduces
Figure 9750DEST_PATH_IMAGE018
, inner coil end center distance L2; Number of stator slots Q1, the upper coil radius of corner R1 from the straightway to the hypotenuse, the radius of corner R2 of upper coil from the hypotenuse to the nose, the radius of corner R3 of inner coil from the straightway to the hypotenuse, the radius of corner R4 of inner coil from the hypotenuse to the nose, nose center line radius of curvature R 5, straight line segment length
Second step, utilize the equivalent circular cylindrical helix, spatially calculate limit, upper strata hypotenuse subtended angle, launch long, axially long:
According to the demand of motor reality, the oblique line section of coil is actual to be to enclose beginning diameter ￠ 1 and upper coil in above layer line to stop helix on the circular cone that diameter ￠ 2 determines.Because accurate conical spiral length calculation method is very complicated, has adopted more accurate equivalent circular cylinder to calculate helical length in the method, the computational accuracy of the method has been enough to satisfy the needs of engineering.Wherein:
Upper coil equivalent circular cylinder diameter Computing formula as follows:
Figure 33835DEST_PATH_IMAGE042
Then, calculate limit, upper strata hypotenuse subtended angle at equivalent circular cylinder diameter
Figure 255869DEST_PATH_IMAGE022
:
Figure 855346DEST_PATH_IMAGE044
Calculate the actual angle of upper coil
Figure 821028DEST_PATH_IMAGE046
:
Figure 688096DEST_PATH_IMAGE048
The hypotenuse that calculates upper coil launches long L3:
Figure 815452DEST_PATH_IMAGE050
Calculate the hypotenuse axial length L 4 of upper coil:
Figure 308751DEST_PATH_IMAGE052
The 3rd step, with the method in second step, utilize the equivalent circular cylindrical helix, spatially calculate lower floor's limit hypotenuse subtended angle, launch long, axially long:
Wherein:
Inner coil equivalent circular cylinder diameter Computing formula as follows:
Then, calculate lower floor's limit hypotenuse subtended angle at equivalent circular cylinder diameter
Figure 694361DEST_PATH_IMAGE024
:
Calculate the actual angle of inner coil
Figure 575915DEST_PATH_IMAGE060
:
Figure 151997DEST_PATH_IMAGE062
The hypotenuse that calculates inner coil launches long
Figure 886734DEST_PATH_IMAGE026
:
Figure 682521DEST_PATH_IMAGE064
Calculate the hypotenuse axial length of inner coil
Figure 793696DEST_PATH_IMAGE028
:
Figure 492793DEST_PATH_IMAGE066
The 4th step, the expansion that is calculated as follows fillet everywhere are long
Figure 398432DEST_PATH_IMAGE030
, :
Figure 330802DEST_PATH_IMAGE068
；
Wherein:
Figure 893195DEST_PATH_IMAGE010
1 is the bent angle of upper coil from the straightway to the hypotenuse,
Figure 625527DEST_PATH_IMAGE010
2 is the bent angle of upper coil from the hypotenuse to the nose,
Figure 740114DEST_PATH_IMAGE010
3 is the bent angle of inner coil from the straightway to the hypotenuse,
Figure 927513DEST_PATH_IMAGE010
4 be inner coil from the hypotenuse to the nose bent angle; And satisfy:
Figure 601202DEST_PATH_IMAGE070
Figure 504436DEST_PATH_IMAGE072
Figure 512843DEST_PATH_IMAGE074
Figure 251735DEST_PATH_IMAGE076
The 5th step, calculating nose length
Figure 29199DEST_PATH_IMAGE034
, total launch long
Figure 41017DEST_PATH_IMAGE036
With line shaft to length
Figure 520409DEST_PATH_IMAGE038
:
Figure 315189DEST_PATH_IMAGE078
Figure 697891DEST_PATH_IMAGE080
Figure 287136DEST_PATH_IMAGE082
The 6th step, employing shuttle winding mold type calculate the size of fusiformis model, wherein:
1, trapezoidal bottom chamfer R=(the radius of corner R1 of upper coil from the straightway to the hypotenuse)+((not insulated coil radial height h)/2) of going up avoid the same section of coil to repeat bending at shuttle around with coil molding the time, cause insulation damages.
2, insulated coil radial height h is not carried out segmentation and calculate, accurately obtain the length of trapezoidal each limit and each arc, make error accumulation to the trapezoidal hypotenuse length of straigh line.
3, suppose the trapezoidal angle number of degrees of going to the bottom, utilize segmentation to calculate and obtain trapezoidal all sized datas, calculate trapezoidal hypotenuse straight line segment length; Simultaneously, deduct trapezoidal correlation length with the single turn length overall of coil, obtain trapezoidal hypotenuse straight line segment length; Relatively the difference of two kinds of computing methods is supposed the trapezoidal angle number of degrees of going to the bottom again, until the difference of two kinds of computing methods less than 0.1.
The 7th step, the coil that will not wrap lie on the ground, and the slotted line nose is to the height on ground.This parameter is used for determining that as the important parameter on the construction drawing radially overall plan is arranged, allows technology that clear and definite check, reference dimension are arranged during fabrication simultaneously.
Adopt said method that existing certain motor coil (the actual winding length of drawing is about 1710mm) is checked, the single-turn circular coil that calculates is long to be 1723mm; And utilizing existing computational methods, single-turn circular coil is long to be 1803mm.The two is compared, and more near true length, error is very little for the measurement result of the inventive method, can ignore.

Claims (4)

1. the hard winding coil determination method for parameter of alternating current machine is characterized in that: comprise the steps:
The coil parameter that the first step, collection motor require comprises: the upper coil initial diameter
Figure 2012100024312100001DEST_PATH_IMAGE001
, upper coil stops diameter
Figure 931866DEST_PATH_IMAGE002
, the upper coil angle , the angle that the deflection of upper coil nose reduces , upper coil end center distance L1, the subtended angle on limit, upper strata
Figure 2012100024312100001DEST_PATH_IMAGE005
1, limit, upper strata nose bent angle
Figure 359490DEST_PATH_IMAGE005
2; The inner coil initial diameter
Figure 300770DEST_PATH_IMAGE006
, inner coil stops diameter
Figure DEST_PATH_IMAGE007
, the inner coil angle
Figure 411683DEST_PATH_IMAGE008
, the angle that the deflection of inner coil nose reduces , inner coil end center distance L2, the subtended angle on lower floor limit
Figure 252512DEST_PATH_IMAGE005
3, lower floor's limit nose bent angle 4; Number of stator slots Q1, the upper coil radius of corner R1 from the straightway to the hypotenuse, the radius of corner R2 of upper coil from the hypotenuse to the nose, the radius of corner R3 of inner coil from the straightway to the hypotenuse, the radius of corner R4 of inner coil from the hypotenuse to the nose, nose center line radius of curvature R 5, straight line segment length
Figure 235566DEST_PATH_IMAGE010
Second the step, utilize the equivalent circular cylindrical helix, spatially calculate the subtended angle of limit, upper strata hypotenuse
Figure DEST_PATH_IMAGE011
, launch long L3 and axial long L4:
(1) is calculated as follows upper coil equivalent circular cylinder diameter :
Figure DEST_PATH_IMAGE013
；
(2) calculate limit, upper strata hypotenuse subtended angle by following formula at equivalent circular cylinder diameter :
Figure 355904DEST_PATH_IMAGE014
；
(3) be calculated as follows the actual angle of upper coil
Figure DEST_PATH_IMAGE015
:
Figure 396410DEST_PATH_IMAGE016
?；
(4) hypotenuse that is calculated as follows upper coil launches long L3:
Figure DEST_PATH_IMAGE017
；
(5) the axial long L4 of the hypotenuse that is calculated as follows upper coil:
Figure 917302DEST_PATH_IMAGE018
；
The 3rd the step, utilize the equivalent circular cylindrical helix, spatially calculate the subtended angle of lower floor's limit hypotenuse , launch long
Figure 789181DEST_PATH_IMAGE020
With axial length
Figure DEST_PATH_IMAGE021
:
(1) is calculated as follows inner coil equivalent circular cylinder diameter
Figure 872413DEST_PATH_IMAGE022
:
；
(2) be calculated as follows the limit hypotenuse subtended angle in equivalent circular cylinder diameter calculating lower floor
Figure 214531DEST_PATH_IMAGE019
:
Figure 283987DEST_PATH_IMAGE024
；
(3) be calculated as follows the actual angle of inner coil
Figure DEST_PATH_IMAGE025
:
Figure 10372DEST_PATH_IMAGE026
?；
(4) hypotenuse that is calculated as follows inner coil launches long
Figure 139871DEST_PATH_IMAGE020
:
Figure DEST_PATH_IMAGE027
；
(5) it is axially long to be calculated as follows the hypotenuse of inner coil :
Figure 502817DEST_PATH_IMAGE028
；
The 4th step, the expansion that is calculated as follows fillet everywhere are long
Figure DEST_PATH_IMAGE029
,
Figure 349288DEST_PATH_IMAGE030
:
Figure DEST_PATH_IMAGE031
；
The 5th the step, calculate nose length respectively by following formula
Figure 830779DEST_PATH_IMAGE032
, total launch long With line shaft to length :
Figure DEST_PATH_IMAGE035
；
Figure 728121DEST_PATH_IMAGE036
；
Figure DEST_PATH_IMAGE037
；
The 6th step, employing shuttle winding mold type calculate the size of fusiformis model;
The 7th step, the coil that will not wrap lie on the ground, and the slotted line nose is to the height on ground.
2. the hard winding coil determination method for parameter of alternating current machine according to claim 1, it is characterized in that: when the 6th step, described employing shuttle winding mold type calculated the size of fusiformis model, the trapezoidal value that goes up bottom chamfer equals not insulated coil radial height sum of R1 and 1/2nd, around with coil molding the time, repeat bending with the same section of avoiding coil at shuttle, cause insulation damages.
3. the hard winding coil determination method for parameter of alternating current machine according to claim 1, it is characterized in that: when the 6th step, described employing shuttle winding mold type calculated the size of fusiformis model, insulated coil radial height is not carried out segmentation to be calculated, accurately obtain the length of trapezoidal each limit and each arc, make error accumulation to the trapezoidal hypotenuse length of straigh line.
4. the hard winding coil determination method for parameter of alternating current machine according to claim 1, it is characterized in that: when the 6th step, described employing shuttle winding mold type calculated the size of fusiformis model, suppose the trapezoidal angle number of degrees of going to the bottom earlier, utilize segmentation to calculate and obtain trapezoidal all sized datas, calculate trapezoidal hypotenuse straight line segment length; Simultaneously, deduct trapezoidal correlation length with the single turn length overall of coil, obtain trapezoidal hypotenuse straight line segment length; Relatively the difference of two kinds of computing methods is supposed the trapezoidal angle number of degrees of going to the bottom again, until the difference of two kinds of computing methods less than 0.1.
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CN104965948B (en) * 2015-06-30 2018-01-16 湘潭电机股份有限公司 A kind of computational methods of Stator Windings of AC Motor coil parameter
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Application publication date: 20120711

Assignee: CHENGDU CSR MOTOR CO., LTD.

Assignor: CSR Chengdu Co., Ltd.

Contract record no.: 2015510000013

Denomination of invention: Method for determining parameters of hard coil winding of AC motor

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