中小型三相感應(yīng)電動機(jī)電磁計(jì)算程序

1、1.2.3.4.5.6.7.8.9.10.11.12 .13.14.15.16.17.18.中小型三相感應(yīng)電動機(jī)（單籠轉(zhuǎn)子）電磁計(jì)算程序額定數(shù)據(jù)及主要尺寸輸出功率PN外施相電壓Une, Y接法UnUn.3接法U n功電流 IkwmQ n效率n 按照設(shè)計(jì)任務(wù)書的規(guī)定功率因數(shù)cos O按照設(shè)計(jì)任務(wù)書的規(guī)定極對數(shù)p定轉(zhuǎn)子槽數(shù)Z1、Z2疋轉(zhuǎn)子每極槽數(shù)Z乙Z p1Zp2Z22p定轉(zhuǎn)子沖片尺寸（見圖1)極距Di12p定轉(zhuǎn)子齒距t1Di1乙D2Z2節(jié)距 y轉(zhuǎn)子斜槽寬每槽導(dǎo)體數(shù)以槽數(shù)計(jì)bsk （般取一個(gè)定子齒距 雙層線圈單層線圈t1，也可按需要設(shè)計(jì)）Ns1 =2 X每線圈匝數(shù)Ns1 =每線圈匝數(shù)每相串聯(lián)導(dǎo)體數(shù)

2、Ns1乙繞組線規(guī)（估算）Nt1 Ac1I1a-i J1|1 （定子電流初步值）KWcos 槽滿率槽面積As 2叮82h)冬有徑向通風(fēng)道WekFe(hnvbv)20. 繞組系數(shù)Kdpi K diK pi分布系數(shù)Kd1短距系數(shù)K p121. 每相有效串聯(lián)導(dǎo)體數(shù)磁路計(jì)算22. 每極磁通sin蟲2qi sin2sin 2N i K dpiEiEi槽絕緣占面積雙層繞組Att(2hsr2i2r2ibii)單層繞組AttSr2i)槽有效面積AefAsAt槽滿率SNtiNsid2SfAefi00%i9.鐵心長It鐵心有效長無徑向通風(fēng)道lefIt 21定轉(zhuǎn)子徑冋通風(fēng)道不父錯(cuò)Isfltnvi bvi定轉(zhuǎn)子徑向通風(fēng)

3、道交錯(cuò)IsfItSvibVin ；2b；2)b；由圖9查出凈鐵長無徑向通風(fēng)道1 FekFe!It4KNmKdpifNi 2.22fN %其中 Ei(1 L)Un (假設(shè) Ke 1 l)23. 每極齒部截面積定子AtiKFehbtiZpi轉(zhuǎn)子 A2KFeltbt2Zp2對于非平行齒，則 bt取離最窄齒三分之一齒高處的齒軛部截面積 Aj! KFehhji定子軛部計(jì)算高度圓底槽h j1D1Di1hs12123平底槽1hj1D1Di1hs12轉(zhuǎn)子Aj1K Felthj2轉(zhuǎn)子軛部計(jì)算高度圓底槽h；2D2Di2hs2r222dv2323平底槽h；2D2Di2hs22dv232對于2極電機(jī)，Di2以三分之一

4、 Di2代入24.25.26.27.28.29.30.31.32.33.空氣隙面積A lef波幅系數(shù)FsB（可先假定飽合系數(shù)B avK 再從圖2中查出Fs）Bt1定子齒磁密轉(zhuǎn)子齒磁密Bt2FsAt2定子軛磁密j12 Aj1轉(zhuǎn)子軛磁密Bj22 Aj2FsA空氣隙磁密根據(jù) Bt1、Bt2、Bj1、Bj2、B s從磁化曲線（表2 或表 3）中查出 Ht1、Ht2、Hj1、Hj2hnh21齒部磁路計(jì)算長度定子圓底槽半開口平底槽Lt101 h2134.35.36.37.38.39.量,40.41.開口平底槽轉(zhuǎn)子圓底槽平底槽軛部磁路計(jì)算長度有效氣隙長度1223Lt 2hi2hl22定子 Lj!轉(zhuǎn)子 Lj2

5、ef K X 2(Di hji)12p2(D2 hj2)12p2半閉口槽和半開口槽K開口槽K齒部磁壓降定子Fti轉(zhuǎn)子Ft2軛部磁壓降定子Fji轉(zhuǎn)子Fj2Cji、Cj2從圖3查出t(4.40.75b 0)2t(4.40.75b0)b0t(5b。)t(5 b)b：H ti LtiH t2 Lt2C jiH jiLjiCj2Hj2Lj2空氣隙磁壓降 F飽合系數(shù)KsFFtiFt2F(Ks值與26項(xiàng)中假定的Ks應(yīng)相符，否則重新假定直至相符。要求精度w i%)總磁壓降F0 FF tiFt2Fjij2滿載磁化電流2pF0.9miNiKdpiKs，并重新計(jì)算2639項(xiàng)中各有關(guān)42.滿載磁化電流標(biāo)么值I *1

6、mmKW43.勵(lì)磁電抗標(biāo)么值YmsiIm44.45.46.47.48.49.50.參數(shù)計(jì)算線圈平均半匝長（見圖單層線圈雙層線圈式中IbCs4)Itlc IbKc2Cs2di為直線部分長（Kc為經(jīng)驗(yàn)值，2極取勝Dii2(h0i1.16;coshii)雙層線圈端部軸向投影長單層線圈端部平均長漏抗系數(shù)Cx定子槽比漏磁導(dǎo)Kui、Kli 查圖 5 ,定子槽漏抗無徑向通風(fēng)道時(shí)有徑向通風(fēng)道時(shí)定子諧波漏抗di 0.0i0.03m，為線圈直線部分伸出鐵心的長度,機(jī)座大、極數(shù)少者取較大值）4、6極取i.2; 8極取i.25?；虬唇?jīng)驗(yàn)取i sin2h2i r2id Cssinbii2r2i,sinbji2r2i2b

7、ti（單層同心式或交叉式線圈Ie 2di Kc24 f 0(NiKdpi) lefPNmi pUN20.263(NiKdpi) lefPNPUn2siui、siKu i u i K Li LiLi從附錄一中查出2mi phi2邑Cx 乙 Kdpilefltiltiltiltinvibbvi（ bvi是通風(fēng)道損失寬度，從圖卩取平均值）i0 3i0查出）2 m 2sCx ( s從圖i3或表5中查出)2 efKdpiKs定子端部漏抗雙層疊繞組單層同心式單層同心式（分組的）、交叉式單層鏈?zhǔn)蕉ㄗ勇┛筙s1 X 1轉(zhuǎn)子槽比漏磁導(dǎo)轉(zhuǎn)子槽漏抗s2s2 U 2t2乙匚2m1 pl無徑向通風(fēng)道時(shí)有徑向通風(fēng)道時(shí)轉(zhuǎn)子

8、諧波漏抗轉(zhuǎn)子端部漏抗轉(zhuǎn)子斜槽漏抗轉(zhuǎn)子漏抗總漏抗l t2lt2l t2lt2定子直流相電阻對A、E、B級絕緣對F、H級絕緣X E2XskXs2R1X E1X E1X E1X E1X E11.2(d10.5 fd) Cxlef0.677 cxlef K dp10.47OJcxlef K dp10.2L2 ( U 2、s2Cxnv2bv2-Cxl ef K dp1L2從附錄一查出）（bv2從圖10查出）m1R2ef0.757(Ie lt2 (1.13lefbsk 2*0.5(旦)2X 2七2X 2 Xe22N1lcNtAr0.0346 10R從圖14或表6查出）D)Cx2pXskm，銅0.0217

9、1060.0392 10m，銅0.0245 1051.52.53.54.55.56.57.58.59.60.61.定子相電阻標(biāo)么值I kwR1Un62.有效材料定子導(dǎo)線重量Gw CIcNsZ AdNt1 式中C為考慮導(dǎo)線絕緣和引線重量的系數(shù)，漆包圓鋁線取1.1,漆包圓銅線取1.05 ；63.為導(dǎo)線密度，鋁為硅鋼片重量GFe轉(zhuǎn)子電阻導(dǎo)條電阻折算值Rb端環(huán)電阻折算值Rb2.7X 103kg/m3,銅為 8.9x 103kg/m3KFeltQ)2 Fe（為沖剪余量，取5mm)K bI BAbDr乙Z224m1(N1KdpJ2 p2ArZ2因疊片不整齊造成導(dǎo)條電阻增加而引入系數(shù)Kb，鑄鋁轉(zhuǎn)子為1.04

10、,銅條轉(zhuǎn)子為1.0對于A、E、B級絕緣：紫銅0.021710 6m，黃銅0.0804 10m,硬紫銅桿0.0278 10 6m，鑄鋁0.0434 10 6硅鋁(0.062 0.0723)610 m對于A、E、B級絕緣：紫銅0.024510 6m，黃銅0.0908 10m,硬紫銅桿0.0314 10m，鑄鋁60.0491 10硅鋁(0.07 0.0816)10導(dǎo)條電阻標(biāo)么值RbI kwRbUn端環(huán)電阻標(biāo)么值*RrI kwRru；轉(zhuǎn)子電阻標(biāo)么值R2RbRr四.工作性能計(jì)算64.滿載時(shí)定子電流有功分量標(biāo)么值11P（假定效率65.滿載時(shí)轉(zhuǎn)子電流無功分量標(biāo)么值lx1X* 2I1P 1(* * 21X I

11、1P)66.滿載時(shí)定子電流無功分量標(biāo)么值*1 1Q67.滿載電勢標(biāo)么值Ke1L 1此值應(yīng)與22項(xiàng)假定相符，否則重新假定68.空載電勢標(biāo)么值1 01* *ImX 169.空載時(shí)定子齒磁密Bt101Bt11L70.空載時(shí)轉(zhuǎn)子齒磁密Bt201-Bt21L71.空載時(shí)定子軛磁密Bj101Bj11L72.空載時(shí)轉(zhuǎn)子軛磁密Bj201Bj21L73.空載時(shí)氣隙磁密B 010 B1L74. 空載疋J齒磁壓降F t10H t101 Lt175.空載轉(zhuǎn)子齒磁壓降F t20H t20 Lt276.空載定子軛磁壓降Fj10H j10 Lj177.空載轉(zhuǎn)子軛磁壓降Fj20Hj2Lj2rKB 078.空載空氣隙磁壓降F

12、0079.空載總磁壓降F00 F 0Ft10Ft 202pFnn80.空載磁化電流I m00.9miN1Kdp11* 2* 281.定子電流標(biāo)么值I1. I1P1 1Q定子電流實(shí)際值I1 i11 KW1Xms* *1 m 1 X* * * *(llpR11 1QX 1 )Ke并計(jì)算2267項(xiàng)，直至誤差小于土 0.5%Fj1o Fj2082.定子電流密度Jial N ti Aci83. 線負(fù)荷 A84. 轉(zhuǎn)子電流標(biāo)么值miN 111Dii轉(zhuǎn)子電流實(shí)際值*miNiKdpiI 2 I 2 I KW _Z2端環(huán)電流實(shí)際值Z22 p85.轉(zhuǎn)子電流密度導(dǎo)條電密AB端環(huán)電密Jr AR286.定子電氣損耗Pc

13、u111 R1Pcu1P cu1 PN87.轉(zhuǎn)子電氣損耗*PAI2* 2 *I2 R2P Al2PAl 2 PN88.雜散損耗鑄鋁轉(zhuǎn)子：p0.025 (2 極)，0.02 (4 極)，0.015 (6 極)，0.01 ( 8 極和 10 極)銅條轉(zhuǎn)子：p*0.005或參考相近規(guī)格的實(shí)測值PsP；Pn89. 機(jī)械損耗參考實(shí)際試驗(yàn)值或按下列公式計(jì)算Pfw 13(1 DJ(3)2(D1)4 103p二極防護(hù)式：四極及以上防護(hù)式：二極封閉型自扇冷式：四極及以上封閉型自扇冷式:3 233Pfw 5.5( ) (D2)10po22Pfw 6.5() (D2)10pPfw (-)2(D1)4103p*P f

14、wP fwGt2pAt1 Lt11FeGj4 PAj1 L j1IIFePFetphetGt損耗系數(shù)pFejphejG j損耗系數(shù)PFek1 PFetk2 PFejPhet根據(jù)Bt 10查表4得到Phej根據(jù)Bj10查表4得到機(jī)械損耗標(biāo)么值90. 定子鐵損耗定子齒重量定子軛重量定子齒損耗定子齒損耗定子鐵損耗鐵耗校正系數(shù)ki2.5 （半閉口槽），3.0 （開口槽）k22.0 （半閉口槽）2.5 （開口槽）定子鐵損耗標(biāo)么值PFePFePn91.總損耗標(biāo)么值P N1此值應(yīng)與64項(xiàng)假定值相符，否則重新假定并計(jì)算6493項(xiàng)，直至誤差小于土0.5%PPculP Al 2 Ps P fw PFe92.輸入功

15、率PNj1 P93.效率94.功率因數(shù)I 1Pcos丨195.轉(zhuǎn)差率SNPai 21pAl 2 ps p fw pFerpFerpFetrpFejrpn96.轉(zhuǎn)速nN60f(1SN )97.最大轉(zhuǎn)矩Tm1 Sn* *2 * 22( R1“R1X )98.99.100.101.102.103.104.105.106.107.五.起動性能計(jì)算起動電流假定值1st (2.5 3.5)Tm I KW起動時(shí)定轉(zhuǎn)子槽磁勢平均值Fst Ist-N10.707(Ku1a1爲(wèi)“ I1)1Z2空氣隙中漏磁場的虛擬磁密Bl064 25 . t1 t2由Bl查圖18可得漏抗飽合系數(shù)Kz齒頂漏磁飽合引起的定子齒頂寬度的

16、的減少Cs1(t1b1)(1 Kz)齒頂漏磁飽合引起的轉(zhuǎn)子齒頂寬度的的減少Cs2(t2b02)(1Kz)起動時(shí)定子槽比漏磁導(dǎo)s1(st) KU1( U1U1 ) K L1 L1U1的計(jì)算見附錄起動時(shí)疋子槽漏抗*X s1(st)s1 (st)*Xs1s1起動時(shí)疋子諧波漏抗*X 1(st)KzX*1起動時(shí)疋子漏抗*X 1(st)* * *X s1(st)X 1(st)X E1考慮集膚效應(yīng)，轉(zhuǎn)子導(dǎo)條相對高度0.987 10 3hBB BYbs2B式中：hB轉(zhuǎn)子導(dǎo)條的高度，對鑄鋁轉(zhuǎn)子不包括槽口高度bBbs2轉(zhuǎn)子導(dǎo)條與轉(zhuǎn)子槽的寬度之比，對鑄鋁轉(zhuǎn)子其值為h021，窄長的銅條其值為 0.9導(dǎo)條的電阻率。對

17、A、E、B 級絕緣，鋁為 0.0434 10 6 m，銅為 0.0217 10 6 m ；對 F、H 級絕緣，鋁為 0.049110 6 m，銅為 0.0245 10 6 m轉(zhuǎn)子電流頻率，起動時(shí)其等于定子電流的頻率108.轉(zhuǎn)子電阻增加系數(shù)和電抗減少系數(shù)Kf、Kx查圖15及圖16RX109.起動時(shí)轉(zhuǎn)子槽比漏磁導(dǎo)s2(st)(U 2U 2)Kx L2(U2的計(jì)算見附錄)110.起動時(shí)轉(zhuǎn)子槽漏抗*Xs2(st)s2(st)*Xs2s2111.起動時(shí)轉(zhuǎn)子諧波漏抗*X 2(st)*KzX2112.起動時(shí)轉(zhuǎn)子斜槽漏抗*X sk (st)KzXSk113.起動時(shí)轉(zhuǎn)子漏抗X*2(st)X*s2(st)*X 2

18、 (st)* *X E2X sk(st)114.起動時(shí)總漏抗X*(st)*X 1(st)*X 2( st)115.起動時(shí)轉(zhuǎn)子總電阻R2(st) K fb lt2)Rb Rr(Ib1 B116.起動時(shí)總電阻*Rst* *R1R2(st)117.起動時(shí)總阻抗*Zst* 2,Rst*X (st)2KfR0KxX。1st1 KW*118.119.120.起動電流Zst此值應(yīng)與98項(xiàng)假定值相符,起動電流的倍數(shù)起動轉(zhuǎn)矩的倍數(shù)計(jì)算用圖否則重新假設(shè)并計(jì)算98118項(xiàng)，直至誤差小于土 3%istLtI1R2(st)TT(1 Sn)Zst13141516171819202122七.計(jì)算用表QZ-2、QZL-2厚絕

19、緣聚酯漆包圓線表1銅 鋁 導(dǎo)體標(biāo)稱直徑mm標(biāo)稱截面積mm2銅鋁漆膜厚度mm參考重量kg/km20 C時(shí)電阻m參考重量kg/km20 C時(shí)電阻m0.500.19641.8650.09270.5980.15010.03 0.060.530.22062.0400.08230.6520.13330.04 0.070.560.24632.2750.07360.7040.11910.04 0.070.600.28272.5890.06390.8100.10350.04 0.070.630.31172.8220.05790.8950.09370.04 0.070.670.35263.2190.05111.0

20、240.08270.04 0.08(0.69)0.37393.4100.04811.1020.07790.04 0.080.710.39593.6160.04611.2100.07460.04 0.080.750.44184.1140.04121.2840.06670.05 0.09(0.69)0.37393.4100.04811.1020.07790.04 0.080.710.39593.6160.04611.2100.07460.04 0.080.750.44184.1140.04121.2840.06670.05 0.09(0.77):0.46574.2500.03901.3700.06

21、320.05 0.090.800.52274.6100.03611.4830.05850.05 0.09(0.83)0.54104.9200.03351.5910.05430.05 0.090.850.56755.2350.03191.6900.05170.05 0.090.900.63625.9360.02841.8590.04600.05 0.09(0.93)0.67936.1600.02661.9800.04300.05 0.090.950.70886.7640.02552.1000.04120.05 0.091.000.78547.2400.02292.3140.03710.06 0.

22、111.060.88258.5050.02062.6160.03330.06 0.111.120.98528.9400.01842.8770.02980.06 0.111.181.09369.8900.01653.1420.02680.06 0.111.251.227211.200.01473.5530.02380.06 0.111.301.327312.100.01363.8330.02200.06 0.11(1.35)1.431413.000.01284.1230.02040.06 0.111.401.539414.000.01174.4240.01890.06 0.11(1.45)1.6

23、51315.000.01094.7420.01760.06 0.111.501.767216.100.01025.0640.01650.06 0.11(1.56)1.911417.350.00945.4650.01520.06 0.111.602.010618.120.00895.7140.01440.07 0.121.702.269820.460.00796.5350.01280.07 0.121.802.544722.910.00707.3100.01140.07 0.121.902.835325.500.00638.0060.01020.07 0.122.003.141628.210.0

24、0579.1400.00920.07 0.122.123.529931.520.00509.8510.00820.07 0.122.243.940836.130.004511.270.00730.07 0.122.364.374441.350.004112.390.00660.07 0.122.54.908744.630.003613.680.00590.07 0.12BT0.000.010.020.030.040.050.060.070.080.09B0.401.381.401.421.441.461.481.501.521.541.560.400.501.581.601.621.641.6

25、61.691.711.741.761.780.500.601.811.841.861.891.911.941.972.002.032.060.600.702.102.132.162.202.242.282.322.362.402.450.700.802.502.552.602.652.702.762.812.872.932.990.800.903.063.133.193.263.333.413.493.573.653.740.901.003.833.924.014.114.224.334.444.564.674.801.001.104.935.075.215.365.525.685.846.0

26、06.166.331.101.206.526.726.947.167.387.627.868.108.368.621.201.308.909.209.509.8010.110.510.911.311.712.11.301.4012.513.113.614.214.815.516.317.118.119.11.401.5020.121.222.423.725.026.728.530.432.635.11.501.6037.840.743.746.850.053.456.860.464.067.81.601.7072.076.480.885.490.295.01001051101161.701.8

27、01221281341401461521581651721801.80B25=1.57T（D24）電工硅鋼薄板（0.5mm）的磁化曲線表3BT0.000.010.020.030.040.050.060.070.080.09BT0.401.371.381.401.421.441.461.481.501.521.540.400.501.561.581.601.621.641.661.681.701.721.750.500.601.771.791.811.841.871.891.921.941.972.000.600.702.032.062.092.122.162.202.232.272.312.3

28、50.700.802.392.432.482.522.572.622.672.732.792.850.800.902.912.973.033.103.173.243.313.393.473.550.901.003.633.713.793.883.974.064.164.264.374.481.001.104.604.724.865.005.145.295.445.605.765.921.101.206.106.286.466.656.857.057.257.467.687.901.201.308.148.408.688.969.269.589.8610.210.611.01.301.4011.

29、411.812.312.813.313.814.415.015.716.41.401.5017.218.018.919.920.922.123.525.026.828.61.501.6030.733.035.638.241.144.04750.053.557.51.601.7061.566.070.575.079.784.589.594.71001051.701.801101161221281341411481551621701.80BT0.000.010.020.030.040.050.060.070.080.09BT0.500.700.720.740.760.780.800.820.840

30、.870.890.500.600.910.930.960.981.011.031.061.081.111.130.600.701.161.191.221.251.281.311.341.371.401.430.700.801.461.491.521.561.591.621.651.681.721.750.800.901.781.811.841.881.911.941.972.002.042.070.901.002.102.142.192.232.282.322.362.402.452.491.001.102.532.572.622.662.712.752.802.852.902.951.101

31、.203.003.053.103.163.213.263.323.383.443.501.201.303.563.623.673.733.783.843.913.984.064.131.301.404.204.284.364.444.524.604.704.804.905.001.401.505.105.225.345.465.585.705.845.986.126.261.501.606.406.536.666.806.937.067.187.287.417.521.601.707.647.707.777.837.907.968.008.048.078.111.701.808.158.248

32、.338.428.518.608.708.808.909.001.801.909.109.209.309.409.509.609.749.8810.0010.201.90三相600相帶諧波比漏磁導(dǎo)系數(shù)工S表5q=2315/64/6工s0.02650.02050.0199q=3318/97/96/9工s0.01290.01030.00900.0097q=4r 3111/1210/129/128/12工s0.00820.00660.00550.00540.0061q=53114/1513/1512/1511/1510/15工s0.00590.00500.00380.00340.00380.0044

33、q=63117/1815/1813/1812/1811/18工s0.00470.00380.00250.00290.00350.0035q=8P 3122/2420/2418/2416/2415/24工s0.00350.00230.00160.00180.00270.00265籠形轉(zhuǎn)子諧波比漏磁導(dǎo)系數(shù)工R表6Z2/2p345678910藝R0.0970.0530.0340.0230.0170.0130.0100.0083Z2/2p12152025304050oo藝R0.00570.00360.00210.00130.00090.00050.00030定子槽的比漏磁導(dǎo)V-bii/1JuhiiJ1

34、h0ib0i 1.轉(zhuǎn)子槽的比漏磁導(dǎo)附錄常用槽形比漏磁導(dǎo)計(jì)算對左圖:h01b012h11b01 b11L1查圖7h01U10.58(b01對左圖：U1 hoi 0.785boiLi查圖7hoi0.58 hiiUib01Cs1Csi1 .5b0lCsiCsiO.5boi對左圖:h02b02L2查圖7h2b02s2b02對左圖:h02b22hi2L2L l查圖7b02 口2h2b02(JCs2Cs2b02b02對左圖：U2L2U2U2h02b022hi2bo2bl2ho2b02(C-Cs2Cs22b02)h2b2L查圖7（鑄鋁轉(zhuǎn)子）0.58hi2 (Cs21 .5b2CS2）（銅條轉(zhuǎn)子）對左圖：U2查圖122hi2L2b02 bL L查圖7U2梨形槽時(shí)查圖12,其他槽形按選用的槽形查對應(yīng)的公式和曲線U2（St）按I （St）的假定值查圖12對左圖:U2L2hi2當(dāng) Ab1 ( AB2 + AB3)時(shí)，可用近似計(jì)算:hl22h12