CN104965948A - Method for calculating alternating-current motor stator winding coil parameters - Google Patents

Abstract

The invention relates to a method for calculating alternating-current motor stator winding coil parameters. The method comprises the following steps of: step 1, calculating the size of an insulated coil wire; step 2, calculating the section size of the end part and the interior of a coil groove and verifying residual space in the groove; step 2, calculating the section size of the end part and the interior of a coil groove and verifying residual space in the groove; step 3, creating a space geometric model of a coil; step 4, judging whether upper and lower edges of the coil need to be subjected to arc bending; step 5, calculating the axial projection length of the end part of the coil, the arc length of the bevel edge of the end part of the coil, the length of a central line of a straight-line part of the coil, the center distance of bent arcs at two ends of the straight-line part of the coil, and the mean turn of the coil; and step 6, calculating shuttle-shaped parameters of the coil. During coil section calculation, the situation of parallel winding of different wire gauges is considered, so that the design scheme of different winding wire gauges can be satisfied; and the space geometric model is adopted, so that pure formulation of a calculation process is realized, computer programming realization is convenient, and the consumption of winding wires is reduced.

Description

A kind of computing method of Stator Windings of AC Motor coil parameter

Technical field

The present invention relates to field of motor manufacturing, particularly relate to a kind of computing method of Stator Windings of AC Motor coil parameter.

Background technology

Now for Stator Windings of AC Motor coil parameter computation model and the concrete calculation process of method as follows:

1, first according to motor electromagnetic design and insulating process requirement, related data is determined;

2, according to coil insulation technological requirement, calculate in coil groove and the sectional dimension of end, and verify remaining space in groove;

3, with the locus of graphing method determination coil in motor;

4, with graphing method and experimental formula determination coil correlation parameter;

5, rule of thumb formula and coil parameter determination racetrack coil parameters.

This kind of computing method calculate based on end projection view and graphing method, mapping is needed to measure corresponding size in process, process is comparatively loaded down with trivial details, and in computation process, relate to a large amount of experimental formula, be a kind of approximate treatment, result of calculation has much relations with the experience calculating people, computation process length consuming time, precision is low, and the computational accuracy especially for end turn size is low, occurs the phenomenon of limit, coil upper strata lower than diameter of stator bore in actual production process.Simultaneously, the calculating of this kind of method calculates for a kind of wire gauge, computation process do not consider two kinds of different wire gauges and around and the situation of different arrangement mode, for this situation, this kind of method all needs first according to actual wire gauge and insulation situation at every turn, and accounting coil groove is interior and end cross-sectional is long-pending, determine equivalent wire gauge, draw coil projection view by mapping again, complete calculating, process is comparatively numerous and diverse.

Summary of the invention

The object of the invention is to overcome above defect, a kind of computing method calculating simple, accurate Stator Windings of AC Motor coil parameter are provided.

Technical scheme of the present invention is, a kind of computing method of Stator Windings of AC Motor coil parameter, and it comprises the following steps:

Size after step 1, the insulation of calculating winding wire, the thickness WIT1 after the first wire insulation, the width W IB1 after the first wire insulation, thickness WIT2 and WIB2 after the second wire insulation;

Wherein:

WIT1＝WT1+2T01

WIB1＝WB1+2T01

WIT2＝WT2+2T02

WIB2＝WB2+2T02

Wherein, WT1 is the first wire bare wire thickness, WB1 is the first wire bare wire width, T01 is the first wire insulation thickness, WT2 is the second wire bare wire thickness, and WB2 is the second wire bare wire width, and T02 is the second wire insulation thickness, if wire only has a kind of wire gauge, then WT2, WB2, T02 can be set to 0.

Step 2, calculate in coil groove and the sectional dimension of end, and verify remaining space in groove;

Width W A in every circle coil bag groove after turn-to-turn insulation:

WA＝max(WIB1·NPD1，WIB2·NPD2)+2T1

Wherein, NPD1 be the first wire and rich radical, NPD2 be the second wire and rich radical, T1 is turn-to-turn insulation thickness in metallic channel, and wherein max (WIB1NPD1, WIB2NPD2) is multiplied by the large value that NPD1 and WIB2 is multiplied by NPD2 result for WIB1;

Thickness HAD in every circle coil bag groove after turn-to-turn insulation:

HAD＝WIT1·NCD1+WIT2·NCD2+2T1

Wherein, NCD1 is the number of plies of the first wire in every circle coil, and NCD2 is the number of plies of the first wire in every circle coil;

Sectional dimension in coil groove, height H and width W:

W＝WA+2T2+2CS

H＝HAD·N+2T2+2CS

Wherein, T2 is insulation against ground thickness in coil groove, and CS is anti-corona insulation thickness in coil groove, and N is coil turn;

Height H BD after the turn-to-turn insulation of every circle coil bag end and width W B:

HBD＝HAD-2T1+2T3

WB＝WA-2T1+2T3

Wherein, T3 is every circle overhang turn-to-turn insulation thickness;

Coil end section size, height H D and width W D:

HD＝HBD·N+2T4

WD＝WB+2T4

Wherein, T4 is end turn insulation against ground thickness;

The sectional dimension after insulation against ground and anti-corona insulation is removed, width W C and height H C in coil groove:

WC＝WA-2T1

HC＝HAD·N-2T1

In groove, remaining space calculates:

Wa＝WS-W

Ha＝HS-2H-HSD-WIHU-WIHM-WIHB

Wherein, Wa is groove insied width direction surplus, and Ha is groove inner height direction surplus, and WS is groove width, and HS is that groove is high, and HSD is slot wedge thickness, and WIHI is insulation spacer thickness under slot wedge.WHIM is levels intercoil insulation spacer thickness in groove, and WIHB is bottom insulation spacer thickness;

Step 3, set up the model space geometric of coil, and calculate midpoint radius R R1 bottom limit, coil upper strata, midpoint radius R R2 bottom coil lower floor limit, subtended angle fai between coil levels limit, winding wiring side and non-connection side nose axis projection length E1, E2, every groove arc length t1, t2 that bottom coil levels limit, midpoint is corresponding:

Notch place insulation thickness hh1:

hh1＝WIHU+T2+T1+CS

Levels intercoil insulation thickness h h2 in groove:

hh2＝WIHM+2(T2+T1+CS)

Midpoint radius R R1 bottom limit, coil upper strata:

$RR1=\frac{D2}{2}+HSD+hh1$

Wherein, D2 is stator core internal diameter;

Midpoint radius R R2 bottom coil lower floor limit:

RR2＝RR1+HC+hh2

Subtended angle fai between coil levels limit:

$fai=2fai1=2fai2=\frac{2\mathrm{\π}}{NS(TAW-1)}$

Wherein, NS is motor stator slot number, and TAW is coil of stator of motor pitch, and fai1, fa12 are respectively the angle of levels coil centerline and coil centerline;

Winding wiring side and non-connection side nose axis projection length E1, E2:

E1＝RD1+HB-HBD-2T3

E2＝RD2+HB-2T3

Wherein, RD1, RD2 are respectively the bent arc radius of winding wiring side and non-connection side;

Every groove arc length t1, t2 that bottom coil levels limit, midpoint is corresponding:

$t1=\frac{2\mathrm{\π}RR1}{NS}$

$t2=\frac{2\mathrm{\π}RR2}{NS}$

Step 4, judgement coil levels limit are the need of curved arc, and if desired curved arc, then according to space geometry position, calculate upper coil bent arc radius and arc length, and by arc length with substitute into follow-up parameter to calculate, otherwise, then by chord length with substitute into and calculate;

Step 5, calculating end turn axis projection are long, end turn hypotenuse arc length, coil line part centerline length, the centre distance of coil straight line portion two ends curved arc, and coil average turn is long;

BD＝WD+Ba

$seitaD=arcsin\left(\frac{BD}{t1}\right)$

CC0＝AA1·tan(seitaD)

Wherein, Ba is given end turn gap, and BD is end turn centre distance assumed value, t1 is stator tooth distance, seitaD is the assumed value of end turn and iron core end face angle, and AA1 is the coil upper strata limit chord length determined of step 4 or arc length, and CC0 is the assumed value of end turn axis projection length;

Recalculate crest clearance:

$seita1=arctan\left(\frac{CC0}{AA1}\right)$

$seita2=arctan\left(\frac{CC0}{AA2}\right)$

B1＝t1·sin(seita1)

B2＝t2·sin(seita2)

Ba1＝B1-WD

Ba2＝B2-WD

$CC=AA1\·tan\left(arcsin\right(\frac{WD+Ba1}{t1}\left)\right)$

Wherein, seita1 is limit, coil upper strata and iron core end face angle, seita2 is coil lower floor limit and iron core end face angle, B1 is end, limit, coil upper strata centre distance, B2 is end, coil lower floor limit centre distance, Ba1 is limit, coil upper strata and limit, adjacent windings upper strata tip spacing, and Ba2 is coil lower floor limit and adjacent windings lower floor limit tip spacing;

Ba1 and Ba is made comparisons, if then replace CC0 with CC and recalculate, until now, CC is the design load of end turn axis projection length, and seita1, seita2 are respectively the design load of coil levels limit and iron core end face angle, and wherein, ξ is the error amount of setting;

The determination of end, coil levels limit hypotenuse arc length S 1, S2:

$S1=\sqrt{AA{1}^2+{\mathrm{CC}}^2}$

$S2=\sqrt{AA{2}^2+{\mathrm{CC}}^2}$

Wherein, AA2 is the coil lower floor limit chord length determined of step 4 or arc length;

The determination of coil levels limit straight line portion centerline length L2, L3:

L2＝L3＝LC+2LD+2LE

Wherein, LC is that iron core is long, and LD is core ends tooth support axial length, and LE is that coil straight line portion stretches out core length;

The centre distance X1 of straight line portion two ends, coil levels limit curved arc, the determination of X2:

$X1=L2-2tan(\frac{\mathrm{\π}}{4}-\frac{seita5}{2})\·(rd1+\frac{WC}{2})$

$X2=L3-2tan(\frac{\mathrm{\π}}{4}-\frac{seita4}{2})\·(rd2+\frac{WC}{2})$

Wherein, rd1 is coil line part two ends bent arc radius, and rd2 is the bent arc radius of end hypotenuse and nose junction;

The determination of the long LLM of coil average turn:

$K1=\frac{rd1+rd2+WA}{2}\[4(\frac{\mathrm{\π}}{2}-seita5)-4tan(\frac{\mathrm{\π}}{4}-\frac{seita1}{2})\]$

$K2=\frac{rd1+rd2+WA}{2}\[4(\frac{\mathrm{\π}}{2}-seita2)-4tan(\frac{\mathrm{\π}}{4}-\frac{seita2}{2})\]$

$LLM=2S1+2S2+X1+X2+K1+K2+2\mathrm{\π}(RD+\frac{WA}{2})$

Wherein, K1, K2 are respectively the curved arc coefficient considering line part two ends, coil levels limit, hypotenuse nose place, end, and RD is end turn nose radius;

Step 6, calculating coil fusiformis parameter.

Preferably, described step 4 judges that coil levels limit is as follows the need of the method for curved arc:

Distance gf, the gi of levels coil side centre distance motor center:

gf＝RR1+hh1

gi＝RR1+hh1+HC+hh2

Upper and lower layer line circle end projection with arc length:

$\stackrel{o}{iu}=fai2\·gi$

The equation Ax+By+C=0 that straight-line equation ek is corresponding can be determined by cartesian geometry, wherein, e is mid point bottom upper coil limit, and k is the bottom mid point of coil upper strata end, limit hypotenuse and nose junction, by e, k two point coordinate just can calculate each term coefficient of straight-line equation ek, specific as follows:

Xe＝RR1·sin(fai1)

Ye＝RR1·cos(fai1)

Xk＝[RR1+F+HC·sin(seita3)]sin(fai2)

Yk＝[RR1+F+HC·sin(seita3)]cos(fai2)

$A=\frac{Yk-Ye}{Xk-Xe}$

B＝-1

$C=Ye-\frac{(Yk-Ye)\·Xe}{Xk-Xe}$

Wherein, F is that end turn nose raises height, and Xe, Ye are respectively horizontal ordinate and the ordinate of e point, and Xk, Yk are respectively horizontal ordinate and the ordinate of k point;

Can calculate motor center to the bee-line of coil upper strata limit bottom centre place straight-line segment ek by former distance between beeline and dot formula is:

$D=\frac{\left|C\right|}{\sqrt{A^2+B^2}}$

Relatively D and RR1, if D>RR1, then the upper and lower layer limit of coil is without the need to curved arc; Otherwise, then curved arc is needed.If need curved arc, then the computing method of end, coil levels limit hypotenuse bent arc radius rr1, rr2 are as follows:

$rr1=\frac{\sqrt{{\[RR1\·sin\left(fai1\right)\]}^2+{\mathrm{CC}}^2+{\[RR1-RR1\·cos\left(fai1\right)\]}^2}}{\cos \left(\frac{\sqrt{{\[RR1\·sin\left(fai1\right)\]}^2+{\mathrm{CC}}^2}}{RR1-RR1\·\cos \left(fai1\right)}\right)}$

$rr2=\frac{\sqrt{{\[RR2\·sin\left(fai2\right)\]}^2+{\mathrm{CC}}^2+{\[RR2-RR2\·cos\left(fai2\right)\]}^2}}{\cos \left(\frac{\sqrt{{\[RR2\·sin\left(fai2\right)\]}^2+{\mathrm{CC}}^2}}{RR2-RR2\·cos\left(fai2\right)}\right)}$

Preferably, described step 5 medial error setting value ξ is 0.1% to 2%.

Preferably, described step 5 medial error setting value ξ is 1%.

Preferably, described step 6 fusiformis adopts trapezoidal fusiformis, is calculated as follows:

The hypotenuse length XX1 of the trapezoidal fusiformis of coil:

XX1＝S1

The long L4 of trapezoidal fusiformis upper base:

L4＝L2

Trapezoidal fusiformis is gone to the bottom long L5:

L5＝L3+S2*2

Trapezoidal fusiformis hypotenuse and lower bottom bent arc radius are RD1:

RD1＝RD

The determination of trapezoidal height h_:

$h=\sqrt{S{2}^2+RD{1}^2-XX{1}^2}$

The determination of the long Lm1 of shuttle:

$Lm1=L2+L3+2S1+2S2+\mathrm{\π}(RD+\frac{HD}{2})$

Advantageous Effects of the present invention is: the present invention when coil section calculates, consider different wire gauge and around situation, different winding wire gauge design proposal can be met; Adopt model space geometric, realize the pure formulism of computation process, be convenient to computer programming and realize, calculate easy; Judge that upper coil is the need of curved arc by geometric relationship, avoid upper coil end lower than the phenomenon of stator core internal diameter; By iterative computation, ensure winding space, and improve the computational accuracy of end turn size; Coil shuttle-type adopts trapezoidal shuttle-type, matches, be convenient to the type that rises realizing coil with the coil type technique that rises, and effectively ensure that the coil each size after type that rises meets design accuracy requirement; Adopt the average turn of the inventive method design coil long less, save the consumption of winding conducting wire.

Accompanying drawing explanation

Fig. 1 is flow chart of steps of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

With reference to accompanying drawing, according to certain model design of electrical motor and insulating process requirement, determine given data: diameter of stator bore D2=1180mm, iron core axial length LC=1250mm, number of stator slots NS=108, number of poles P=12, embedded coil columns LIE=1, turn number N=8, embedded coil number of plies CENG=2, the first wire bare wire thickness WT1=8.2mm, width W B1=3.35mm, thickness WIT1=8.2mm after the first wire turn-to-turn insulation, width W IB1=3.35, the first wire columns NPD1=1, the number of plies NCD1=1 of the first wire in every circle coil, the second wire bare wire thickness WT2=0mm, width W B2=0mm, columns NPD2=0, the number of plies NCD2=0 of the second wire in every circle coil, turn-to-turn insulation thickness T1=0.15mm in metallic channel, end turn-to-turn insulation thickness T3=0.15mm, embedded coil insulation against ground thickness T2=2.2mm, end insulation against ground thickness T4=2.2mm, anti-corona insulation thickness C2=0mm, insulation spacer thickness WIHU=1mm under slot wedge, levels intercoil insulation spacer thickness WIHM=3mm, bottom insulation spacer thickness WIHB=1mm in groove, stator groove depth HS=74mm, slot wedge thickness HSD=4mm, groove width WS=11.5mm, end turn gap set-point Ba=7mm, pole span (groove number) TAWS=9, core ends tooth support axial length L D=20mm, coil straight line portion stretches out core length LE=20mm, end turn nose raises F=20mm, the angle seita3=0.349rad of end turn nose center line and coil centerline, winding wiring side end nose radius R D=15mm, the bending radius rd1=30mm of coil line part and hypotenuse junction, end, the bending radius rd2=30mm of end turn hypotenuse and nose junction, the computing method of long ysc=45mm, its stator winding coil parameter of going between, comprise the following steps:

Size after step 1, the insulation of calculating winding wire, the thickness WIT1 after the first wire insulation, the width W IB1 after the first wire insulation, thickness WIT2 and WIB2 after the second wire insulation;

WIT1＝WT1+2T01＝8.2mm

WIB1＝WB1+2T01＝3.35mm

WIT2＝WT2+2T02＝0mm

WIB2＝WB2+2T02＝0mm

Step 2, calculate in coil groove and the sectional dimension of end, and verify remaining space in groove;

Width W A in every circle coil bag groove after turn-to-turn insulation:

WA＝max(WIB1·NPD1n WIB2·NPD2)+2T1＝8.5mm

Thickness HAD in every circle coil bag groove after turn-to-turn insulation:

HAD＝WIT1·NCD1+WIT2·NCD2+2T1＝3.65mm

Sectional dimension in coil groove, height H and width W:

W＝WA+2T2+2CS＝10.7mm

H＝HAD·N+2T2+2CS＝31.4mm

Height H BD after the turn-to-turn insulation of every circle coil bag end and width W B:

HBD＝HAD-2T1+2T3＝3.65mm

WB＝WA-2T1+2T3＝8.5mm

Coil end section size, height H D and width W D:

HD＝HBD·N+2T4＝31.4mm

WD＝WB+2T4＝10.7mm

The sectional dimension after insulation against ground and anti-corona insulation is removed, width W C and height H C in coil groove:

WC＝WA-2T1＝8.2mm

HC＝HAD·N-2T1＝28.9mm

In groove, remaining space calculates:

Wa＝WS-W＝0.2mm

Ha＝HS-2H-HSD-WIHU-WIHM-WIHB＝1.3mm

Step 3, set up the model space geometric of coil, and calculate midpoint radius R R1 bottom limit, coil coil upper strata, midpoint radius R R2 bottom coil lower floor limit, subtended angle fai between coil levels limit, winding wiring side and non-connection side nose axis projection length E1, E2, every groove arc length t1, t2 that bottom coil levels limit, midpoint is corresponding:

Notch place insulation thickness hh1:

hh1＝WIHU+T2+T1+CS＝2.85mm

Levels intercoil insulation thickness h h2 in groove:

hh2＝WIHM+2(T2+T1+CS)＝5.5mm

Midpoint radius R R1 bottom limit, coil upper strata:

$RR1=\frac{D2}{2}+HSD+hh1=467mm$

Midpoint radius R R2 bottom coil lower floor limit:

RR2＝RR1+HC+hh2＝501.5mm

Subtended angle fai between coil levels limit:

$fai=2fai1=2fai2=\frac{2\mathrm{\π}}{NS(TAW-1)}=0.4654rad$

Winding wiring side and non-connection side nose axis projection length E1, E2:

E1＝RD1+HB-HBD-2T3＝41mm

E2＝RD2+HB-2T3＝44mm

Every groove arc length t1, t2 that bottom coil levels limit, midpoint is corresponding:

$t1=\frac{2\mathrm{\π}RR1}{NS}=27.17mm$

$t2=\frac{2\mathrm{\π}RR2}{NS}=29.18mm$

Step 4, judgement coil levels limit are the need of curved arc:

Distance gf, the gi of levels coil side centre distance motor center:

gf＝RR1+hh1＝481.45mm

gi＝RR1+hh1+HC+hh2＝515.95mm

Upper and lower layer line circle end projection with arc length:

$\stackrel{o}{iu}=fai2\·\mathrm{gi}=123\mathrm{mm}$

The equation Ax+By+C=0 that straight-line equation ek is corresponding can be determined by cartesian geometry, wherein, e is mid point bottom upper coil limit, and k is the bottom mid point of coil upper strata end, limit hypotenuse and nose junction, by e, k two point coordinate just can calculate each term coefficient of straight-line equation ek, specific as follows:

Xe＝RR1·sin(fai1)＝108

Ye＝RR1·cos(fai1)＝454.4

Xk＝[RR1+F+HC·sin(seita3)]sin(fai2)＝15

Yk＝[RR1+F+HC·sin(seita3)]cos(fai2)＝489.6

$A=\frac{Yk-Ye}{Xk-Xe}=-0.38$

B＝-1

$C=Ye-\frac{(Yk-Ye)\·Xe}{Xk-Xe}=495.4$

Can calculate motor center to the bee-line of coil upper strata limit bottom centre place straight-line segment ek by former distance between beeline and dot formula is:

$D=\frac{\left|C\right|}{\sqrt{A^2+B^2}}=463mm<RR1$

End, coil levels limit hypotenuse bent arc radius rr1, rr2:

$rr1=\frac{\sqrt{{\&lsqb;RR1\&CenterDot;sin\left(fai1\right)\&rsqb;}^2+{\mathrm{CC}}^2+{\&lsqb;RR1-RR1\&CenterDot;cos\left(fai1\right)\&rsqb;}^2}}{\cos \left(\frac{\sqrt{{\&lsqb;RR1\&CenterDot;sin\left(fai1\right)\&rsqb;}^2+{\mathrm{CC}}^2}}{RR1-RR1\&CenterDot;\cos \left(fai1\right)}\right)}=803mm$

$rr2=\frac{\sqrt{{\&lsqb;RR2\&CenterDot;sin\left(fai2\right)\&rsqb;}^2+{\mathrm{CC}}^2+{\&lsqb;RR2-RR2\&CenterDot;cos\left(fai2\right)\&rsqb;}^2}}{\cos \left(\frac{\sqrt{{\&lsqb;RR2\&CenterDot;sin\left(fai2\right)\&rsqb;}^2+{\mathrm{CC}}^2}}{RR2-RR2\&CenterDot;cos\left(fai2\right)}\right)}=814mm$

Step 5, calculating end turn axis projection are long, end turn hypotenuse arc length, coil line part centerline length, the centre distance of coil straight line portion two ends curved arc, and coil average turn is long;

BD＝WD+Ba

$seitaD=arcsin\left(\frac{BD}{t1}\right)$

CC0＝AA1·tan(seitaD)

Recalculate crest clearance:

$seita1=arctan\left(\frac{CC0}{AA1}\right)$

$seita2=arctan\left(\frac{CC0}{AA2}\right)$

B1＝t1·sin(seita1)

B2＝t2·sin(seita2)

Ba1＝B1-WD

Ba2＝B2-WD

$CC=AA1\&CenterDot;tan\left(arcsin\right(\frac{WD+Ba1}{t1}\left)\right)$

Through iterative computation, when time, CC=92mm, seita1=0.7112rad, seita2=0.6422rad, Ba1=7.03mm;

The determination of end, coil levels limit hypotenuse arc length S 1, S2:

$S1=\sqrt{AA{1}^2+{\mathrm{CC}}^2}=141mm$

$S2=\sqrt{AA{2}^2+{\mathrm{CC}}^2}=153.6mm$

The determination of coil levels limit straight line portion centerline length L2, L3:

L2＝L3＝LC+2LD+2LE＝1330mm

The centre distance X1 of straight line portion two ends, coil levels limit curved arc, the determination of X2:

$X1=L2-2tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita5}{2})\&CenterDot;(rd1+\frac{WC}{2})=1298.7mm$

$X2=L3-2tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita4}{2})\&CenterDot;(rd2+\frac{WC}{2})=1295.8mm$

The determination of the long LLM of coil average turn:

$K1=\frac{rd1+rd2+WA}{2}\&lsqb;4(\frac{\mathrm{\&pi;}}{2}-seita5)-4tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita1}{2})\&rsqb;=54.97mm$

$K2=\frac{rd1+rd2+WA}{2}\&lsqb;4(\frac{\mathrm{\&pi;}}{2}-seita2)-4tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita2}{2})\&rsqb;=58.6mm$

$LLM=2S1+2S2+X1+X2+K1+K2+2\mathrm{\&pi;}(RD+\frac{WA}{2})=3358.2mm$

Step 6, calculating coil fusiformis parameter.

Preferably, described step 6 fusiformis adopts trapezoidal fusiformis, and parameter is as follows:

The hypotenuse length XX1 of the trapezoidal fusiformis of coil:

XX1＝S1＝141mm

The long L4 of trapezoidal fusiformis upper base:

L4＝L2＝153.6mm

Trapezoidal fusiformis is gone to the bottom long L5:

L5＝L3+S2*2＝1636mm

Trapezoidal fusiformis hypotenuse and lower bottom bent arc radius are RD1, RD2:

RD1＝RD2＝RD＝15mm

The determination of trapezoidal height h_:

$h=\sqrt{S{2}^2+RD{1}^2-XX{1}^2}=79mm$

The determination of the long Lm1 of shuttle:

$Lm1=L2+L3+2S1+2S2+\mathrm{\&pi;}(RD+\frac{HD}{2})=3420mm$

Claims (5)

1. computing method for Stator Windings of AC Motor coil parameter, is characterized in that, it comprises the following steps:

Size after step 1, the insulation of calculating winding wire, the thickness WIT1 after the first wire insulation, the width W IB1 after the first wire insulation, thickness WIT2 and WIB2 after the second wire insulation;

Wherein:

WIT1＝WT1+2T01

WIB1＝WB1+2T01

WIT2＝WT2+2T02

WIB2＝WB2+2T02

Wherein, WT1 is the first wire bare wire thickness, WB1 is the first wire bare wire width, T01 is the first wire insulation thickness, WT2 is the second wire bare wire thickness, and WB2 is the second wire bare wire width, and T02 is the second wire insulation thickness, if wire only has a kind of wire gauge, then WT2, WB2, T02 can be set to 0;

Step 2, calculate in coil groove and the sectional dimension of end, and verify remaining space in groove;

Width W A in every circle coil bag groove after turn-to-turn insulation:

WA＝max(WIB1·NPD1，WIB2·NPD2)+2T1

Wherein, NPD1 be the first wire and rich radical, NPD2 be the second wire and rich radical, T1 is turn-to-turn insulation thickness in metallic channel, and wherein max (WIB1NPD1, WIB2NPD2) is multiplied by the large value that NPD1 and WIB2 is multiplied by NPD2 result for WIB1;

Thickness HAD in every circle coil bag groove after turn-to-turn insulation:

HAD＝WIT1·NCD1+WIT2·NCD2+2T1

Wherein, NCD1 is the number of plies of the first wire in every circle coil, and NCD2 is the number of plies of the first wire in every circle coil;

Sectional dimension in coil groove, height H and width W:

W＝WA+2T2+2CS

H＝HAD·N+2T2+2CS

Wherein, T2 is insulation against ground thickness in coil groove, and CS is anti-corona insulation thickness in coil groove, and N is coil turn;

Height H BD after the turn-to-turn insulation of every circle coil bag end and width W B:

HBD＝HAD-2T1+2T3

WB＝WA-2T1+2T3

Wherein, T3 is every circle overhang turn-to-turn insulation thickness;

Coil end section size, height H D and width W D:

HD＝HBD·N+2T4

WD＝WB+2T4

Wherein, T4 is end turn insulation against ground thickness;

The sectional dimension after insulation against ground and anti-corona insulation is removed, width W C and height H C in coil groove:

WC＝WA-2T1

HC＝HAD·N-2T1

In groove, remaining space calculates:

Wa＝WS-W

Ha＝HS-2H-HSD-WIHU-WIHM-WIHB

Wherein, Wa is groove insied width direction surplus, and Ha is groove inner height direction surplus, and WS is groove width, and HS is that groove is high, and HSD is slot wedge thickness, and WIHI is insulation spacer thickness under slot wedge.WHIM is levels intercoil insulation spacer thickness in groove, and WIHB is bottom insulation spacer thickness;

Step 3, set up the model space geometric of coil, and calculate midpoint radius R R1 bottom limit, coil upper strata, midpoint radius R R2 bottom coil lower floor limit, subtended angle fai between coil levels limit, winding wiring side and non-connection side nose axis projection length E1, E2, every groove arc length t1, t2 that bottom coil levels limit, midpoint is corresponding:

Notch place insulation thickness hh1:

hh1＝WIHU+T2+T1+CS

Levels intercoil insulation thickness h h2 in groove:

hh2＝WIHM+2(T2+T1+CS)

Midpoint radius R R1 bottom limit, coil upper strata:

$RR1=\frac{D2}{2}+HSD+hh1$

Wherein, D2 is stator core internal diameter;

Midpoint radius R R2 bottom coil lower floor limit:

RR2＝RR1+HC+hh2

Subtended angle fai between coil levels limit:

$fai=2fai1=2fai2=\frac{2\mathrm{\&pi;}}{NS(TAW-1)}$

Wherein, NS is motor stator slot number, and TAW is coil of stator of motor pitch, and fai1, fa12 are respectively the angle of levels coil centerline and coil centerline;

Winding wiring side and non-connection side nose axis projection length E1, E2:

E1＝RD1+HB-HBD-2T3

E2＝RD2+HB-2T3

Wherein, RD1, RD2 are respectively the bent arc radius of winding wiring side and non-connection side;

Every groove arc length t1, t2 that bottom coil levels limit, midpoint is corresponding:

$t1=\frac{2\mathrm{\&pi;}RR1}{NS}$

$t2=\frac{2\mathrm{\&pi;}RR2}{NS}$

Step 4, judgement coil levels limit are the need of curved arc, and if desired curved arc, then according to space geometry position, calculate upper coil bent arc radius and arc length, and by arc length with substitute into follow-up parameter to calculate, otherwise, then by chord length with substitute into and calculate;

Step 5, calculating end turn axis projection are long, end turn hypotenuse arc length, coil line part centerline length, the centre distance of coil straight line portion two ends curved arc, and coil average turn is long;

BD＝WD+Ba

$seitaD=\arcsin \left(\frac{BD}{t1}\right)$

CC0＝AA1·tan(seitaD)

Wherein, Ba is given end turn gap, and BD is end turn centre distance assumed value, t1 is stator tooth distance, seitaD is the assumed value of end turn and iron core end face angle, and AA1 is the coil upper strata limit chord length determined of step 4 or arc length, and CC0 is the assumed value of end turn axis projection length;

Recalculate crest clearance:

$seita1=\arctan \left(\frac{CC0}{AA1}\right)$

$seita2=\arctan \left(\frac{CC0}{AA2}\right)$

B1＝t1·sin(seita1)

B2＝t2·sin(seita2)

Ba1＝B1-WD

Ba2＝B2-WD

$CC=AA1\&CenterDot;tan\left(\arcsin \left(\frac{WD+Ba1}{t1}\right)\right)$

Wherein, seita1 is limit, coil upper strata and iron core end face angle, seita2 is coil lower floor limit and iron core end face angle, B1 is end, limit, coil upper strata centre distance, B2 is end, coil lower floor limit centre distance, Ba1 is limit, coil upper strata and limit, adjacent windings upper strata tip spacing, and Ba2 is coil lower floor limit and adjacent windings lower floor limit tip spacing;

Ba1 and Ba is made comparisons, if then replace CC0 with CC and recalculate, until now, CC is the design load of end turn axis projection length, and seita1, seita2 are respectively the design load of coil levels limit and iron core end face angle, and wherein, ξ is the error amount of setting;

The determination of end, coil levels limit hypotenuse arc length S 1, S2:

$S1=\sqrt{AA{1}^2+{\mathrm{CC}}^2}$

$S2=\sqrt{AA{2}^2+{\mathrm{CC}}^2}$

Wherein, AA2 is the coil lower floor limit chord length determined of step 4 or arc length;

The determination of coil levels limit straight line portion centerline length L2, L3:

L2＝L3＝LC+2LD+2LE

Wherein, LC is that iron core is long, and LD is core ends tooth support axial length, and LE is that coil straight line portion stretches out core length;

The centre distance X1 of straight line portion two ends, coil levels limit curved arc, the determination of X2:

$X1=L2-2tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita5}{2})\&CenterDot;(rd1+\frac{WC}{2})$

$X2=L3-2tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita4}{2})\&CenterDot;(rd2+\frac{WC}{2})$

Wherein, rd1 is coil line part two ends bent arc radius, and rd2 is the bent arc radius of end hypotenuse and nose junction;

The determination of the long LLM of coil average turn:

$K1=\frac{rd1+rd2+WA}{2}\&lsqb;4(\frac{\mathrm{\&pi;}}{2}-seita5)-4tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita1}{2})\&rsqb;$

$K2=\frac{rd1+rd2+WA}{2}\&lsqb;4(\frac{\mathrm{\&pi;}}{2}-seita2)-4tan(\frac{\mathrm{\&pi;}}{4}-\frac{seita2}{2})\&rsqb;$

$LLM=2S1+2S2+X1+X2+K1+K2+2\mathrm{\&pi;}(RD+\frac{WA}{2})$

Wherein, K1, K2 are respectively the curved arc coefficient considering line part two ends, coil levels limit, hypotenuse nose place, end, and RD is end turn nose radius;

Step 6, calculating coil fusiformis parameter.

2. the computing method of a kind of Stator Windings of AC Motor coil parameter according to claim 1, is characterized in that, described step 4 judges that coil levels limit is as follows the need of the method for curved arc:

Distance gf, the gi of levels coil side centre distance motor center:

gf＝RR1+hh1

gi＝RR1+hh1+HC+hh2

Upper and lower layer line circle end projection with arc length:

The equation Ax+By+C=0 that straight-line equation ek is corresponding can be determined by cartesian geometry, wherein, e is mid point bottom upper coil limit, and k is the bottom mid point of coil upper strata end, limit hypotenuse and nose junction, by e, k two point coordinate just can calculate each term coefficient of straight-line equation ek, specific as follows:

Xe＝RR1·sin(fai1)

Ye＝RR1·cos(fai1)

Xk＝[RR1+F+HC·sin(seita3)]sin(fai2)

Yk＝[RR1+F+HC·sin(seita3)]cos(fai2)

$A=\frac{Yk-Ye}{Xk-Xe}$

B＝-1

$C=Ye-\frac{(Yk-Ye)\&CenterDot;Xe}{Xk-Xe}$

Wherein, F is that end turn nose raises height, and Xe, Ye are respectively horizontal ordinate and the ordinate of e point, and Xk, Yk are respectively horizontal ordinate and the ordinate of k point;

Can calculate motor center to the bee-line of coil upper strata limit bottom centre place straight-line segment ek by former distance between beeline and dot formula is:

$D=\frac{\left|C\right|}{\sqrt{A^2+B^2}}$

Relatively D and RR1, if D>RR1, then the upper and lower layer limit of coil is without the need to curved arc; Otherwise, then curved arc is needed.If need curved arc, then the computing method of end, coil levels limit hypotenuse bent arc radius rr1, rr2 are as follows:

$rr1=\frac{\sqrt{{\&lsqb;RR1\&CenterDot;sin\left(fai1\right)\&rsqb;}^2+{\mathrm{CC}}^2+{\&lsqb;RR1-RR1\&CenterDot;cos\left(fai1\right)\&rsqb;}^2}}{\cos \left(\frac{\sqrt{{\&lsqb;RR1\&CenterDot;sin\left(fai1\right)\&rsqb;}^2+{\mathrm{CC}}^2}}{RR1-RR1\&CenterDot;\cos \left(fai1\right)}\right)}$

$rr2=\frac{\sqrt{{\&lsqb;RR2\&CenterDot;sin\left(fai2\right)\&rsqb;}^2+{\mathrm{CC}}^2+{\&lsqb;RR2-RR2\&CenterDot;cos\left(fai2\right)\&rsqb;}^2}}{cos\left(\frac{\sqrt{{\&lsqb;RR2\&CenterDot;sin\left(fai2\right)\&rsqb;}^2+{\mathrm{CC}}^2}}{RR2-RR2\&CenterDot;\cos \left(fai2\right)}\right)}$

3. according to the computing method of a kind of Stator Windings of AC Motor coil parameter according to claim 1 or claim 2, it is characterized in that, described step 5 medial error setting value ξ is 0.1% to 2%.

4. the computing method of a kind of Stator Windings of AC Motor coil parameter according to claim 3, is characterized in that, described step 5 medial error setting value ξ is 1%.

5., according to the computing method of claim 1 or claim 2 or a kind of Stator Windings of AC Motor coil parameter according to claim 3, it is characterized in that, described step 6 fusiformis adopts trapezoidal fusiformis, and computing method are as follows:

The hypotenuse length XX1 of the trapezoidal fusiformis of coil:

XX1＝S1

The long L4 of trapezoidal fusiformis upper base:

L4＝L2

Trapezoidal fusiformis is gone to the bottom long L5:

L5＝L3+S2*2

Trapezoidal fusiformis hypotenuse and lower bottom bent arc radius are RD1:

RD1＝RD

The determination of trapezoidal height h_:

$h=\sqrt{S{2}^2+RD{1}^2-XX{1}^2}$

The determination of the long Lm1 of shuttle:

$Lm1=L2+L3+2S1+2S2+\mathrm{\&pi;}(RD+\frac{HD}{2})$