1、1.2.3.4.5.6.7.8.9.10.11.12 .13.14.15.16.17.18.中小型三相感應電動機（單籠轉子）電磁計算程序額定數據及主要尺寸輸出功率Pn外施相電壓Un巾，Y接法U n© =， 接法Un©=Un弋3功電流 I KW =m1U N©效率 n '按照設計任務書的規定功率因數cos按照設計任務書的規定 極對數p定轉子槽數Z1、Z2定轉子每極槽數Zp1Zlp 2pZp2Z22p2定轉子沖片尺寸（見圖 1）nDi1極距2p定轉子齒距t1i1二 d2z?節距 y以槽數計轉子斜槽寬 bsk （一般取一個定子齒距 t1,也可按需要設計）每槽導體

2、數雙層線圈單層線圈Ns1 =2 X每線圈匝數Ns1 =每線圈匝數每相串聯導體數Ns二繞組線規（估算）N't1 A'c1I'1a1 JI'（定子電流初步值）= KW'cos '槽滿率槽面積人$=組 （h's-h） 二2 2槽絕緣占面積雙層繞組AtI: t(2hs :212r 21bn)單層繞組At二.：t（2hs二G）槽有效面積Aef = As - At槽滿率Sf2二 Nt1Ns1d 100%19.鐵心長lt鐵心有效長無徑向通風道lef2'定轉子徑向通風道不交錯lsf-It-nv1bv1定轉子徑向通風道交錯lsf-It-(nX n

3、v2b；2)凈鐵長20.21.bv繞組系數由圖9查出分布系數短距系數無徑向通風道有徑向通風道Kdp1 = K d1K p1Kd1Kp1每相有效串聯導體數I Fe = kFeltl Fe = kFe (lt - nvbv )sin=2_aq1 sin2.71 R=si n -2N 1Kdp1磁路計算22.每極磁通E1E14KNm Kdp1 fN 12.22fN 1Kdp1其中 E1 =(1 - ；l)Un (假設 Ke、1 - ；l')23.每極齒部截面積定子At1 =KFehbt1Zp1轉子 A2 二 KFeg2Zp2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Aji

4、= K Feh h'ji定子軛部計算高度圓底槽h jiDi - Diir2ihsi3si轉子Aji轉子軛部計算高度對于空氣隙面積波幅系數Fs定子齒磁密轉子齒磁密定子軛磁密轉子軛磁密空氣隙磁密根據 Bti、Bt2、平底槽hjiDi - Dii2 hsi-K Fe11 h j2圓底槽平底槽j2D2土- hs22l?dv233hj2D22極電機，Di2以三分之一肛（可先假定飽合系數B、avBti尺Bt2B jiBj2Di2代入K '再從圖2中查出Fs）FsAt2BBji、齒部磁路計算長度定子圓底槽半開口平底槽AjiA、.Aj2Bj2、B 5從磁化曲線（表2或表3）中查出Hti、Ht2

5、、比、Hj2iLti fh2i -r2iLti = hiih2i24.25.26.27.28.29.30.31.32.33.開口平底槽Lt1 =hs11轉子 圓底槽Lt2二02h22r223平底槽Lt2 =2 h2234.軛部磁路計算長度定子L"営r轉子L'j22p235.有效氣隙長度ef = K 1K 2；半閉口槽和半開口槽t(440.75b °)t(440.75b0) -b0開口槽-t36.齒部磁壓降定子Ft1-H t1 Lt1轉子Ft2-H t2 Lt237.軛部磁壓降定子Fj1=C j1 H j1 L' j1轉子Fj2二 Cj2Hj2L'j2

6、Cji、Cj2從圖3查出38. 空氣隙磁壓降 F 一 0F孟+已+ F39. 飽合系數Ks39項中各有關（Ks值與26項中假定的Ks'應相符，否則重新假定Ks'，并重新計算26量，直至相符。要求精度w±1%）40總磁壓降F。二巳卡廿比Fj1 ' Fj241.滿載磁化電流Im一42.滿載磁化電流標么值*1 m1 m 二-1 KW43.勵磁電抗標么值ms*Im參數計算44.線圈平均半匝長（見圖 4）單層線圈雙層線圈45.46.47.48.式中Ib二 It2di為直線部分長（Kc為經驗值,2極取勝1.16;Csdi =0.010.03m，為線圈直線部分伸出鐵心的長度

7、,機座大、極數少者取較大值）4、6極取1.2; 8極取1.25。或按經驗取y2 cos -：s'c o s = 1 -s i n 二 ,sin 如2215 +2畑 +2"Di1 2（h011）山11（單層同心式或交叉式線圈3取平均值）2p雙層線圈端部軸向投影長單層線圈端部平均長漏抗系數Cx定子槽比漏磁導Ie =2dKe y2QJ0(N1Kdp1) lefPN0.263(N1Kdp1)Pn,z = Z X 10m1 pU N©s1Ku1、Kl1 查圖 5 ,-L1從附錄一中查出49.定子槽漏抗Xs12m1 plt1 s1 Cx2乙 Kdp1lef無徑向通風道時It1T

8、t1有徑向通風道時lt1=1廿- n“bbv1 （ bv1是通風道損失寬度，從圖10查出）50.定子諧波漏抗X廠7心從圖13或表5中查出）定子端部漏抗雙層疊繞組單層同心式單層同心式（分組的）、交叉式單層鏈式定子漏抗X E1X E1X E1X E1X汀二乂引 +X& +Xe11.2（d1 +0.5fd）Cxlef= 0.67 似°Cxlef K dp1“.47（Ie-°.64 y）Cxlef K dp1= 0.2 e 2 Cx1 ef K dp151.52.53.54.55.56.57.58.59.60.轉子槽比漏磁導's2 = ' U 2 '

9、 L2 （ -U 2、二 L2 從附錄一查出）轉子槽漏抗Xs22m1Plt2 s2 Cx乙lef無徑向通風道時lt2 "t2有徑向通風道時lt2 =lt2 - nv2*2（ bv2 從圖 10 查出）轉子諧波漏抗X、2罟Cx（匚R從圖14或表6查出）轉子端部漏抗X E2四（DR）Cxlef 1.13 2p轉子斜槽漏抗Xskbsk 2*=0.5（產）2x&t2轉子漏抗X；：2 二 Xs2 X、2 Xe2 Xsk總漏抗定子直流相電阻2"札R1NtA'對 A、E、B 級絕緣 鋁=0.0346 10®m，銅：=0.0217 10®m對 F、H 級

10、絕緣鋁 =0.0392 10“門 m，銅；=0.0245 10®m61. 定子相電阻標么值R* = R1-kwUn©62. 有效材料定子導線重量Gw二CIcNsZAd'Nt"'式中C為考慮導線絕緣和引線重量的系數，漆包圓鋁線取1.1，漆包圓銅線取1.05;"'為導線密度，鋁為2.7X 103kg/m3,銅為 8.9 x 103kg/m3硅鋼片重量2GFe二KFeh（D1，）訂'（：為沖剪余量，取5mm）導條電阻折算值2R 'r KbIb4m1(N1Kdp1)AbZ2端環電阻折算值2 » c DrZ2 4m

11、1(N1Kdp1) Rb2二 P ArZ263.轉子電阻因疊片不整齊造成導條電阻增加而引入系數Kb ,鑄鋁轉子為1.04,銅條轉子為1.0對于A、E、B級絕緣：紫銅 Q =0.0217 10®m，黃銅卜=0.0804 10®m.硬紫銅桿 t = 0.0278 10®m，鑄鋁 =0.0434 10®m ,硅鋁卜=(0.062 0.0723) 10®m對于A、E、B級絕緣：紫銅卜=0.0245 10®m，黃銅 匸= 0.0908 10®m.硬紫銅桿Q =0.0314 10®m，鑄鋁卜=0.0491 10®m

12、,硅鋁=(0.07 0.0816) 10®m導條電阻標么值*Rb二 RbUn端環電阻標么值*Rr-R' IKWRRUn轉子電阻標么值R2-RbRr四. 工作性能計算64.滿載時定子電流有功分量標么值11Pn-（假定效率'）65.滿載時轉子電流無功分量標么值lx* 2*2= -1XcI1P 1(X；：I1P)166.67.68.69.70.71.72.73.74.75.76.77.78.79.80.81.*X彳匚 1 =1*-Xms滿載時定子電流無功分量標么值* *1 1Q = 1 m1 X滿載電勢標么值Ke =1 _ ；l =1 _ （l；pR； T；qX；1）此值應

13、與22項假定相符，否則重新假定Ke并計算2267項，直至誤差小于土 0.5%空載電勢標么值1 - ；0 =1_'ImXji1 Sq 空載時定子齒磁密Bt100 Bt11 牡1 - Sq空載時轉子齒磁密Bt20- Bt21 - sL空載時定子軛磁密Bj1。=匕Bj11 -®L空載時轉子軛磁密Bj20二匕一°Bj21 %空載時氣隙磁密1 bqb空載定子齒磁壓降 空載轉子齒磁壓降 空載定子軛磁壓降 空載轉子軛磁壓降Ft10 = H t10 Lt1Ft20= H t20 Lt2F H L 'j10j10j1F H Lj20j20 j2空載空氣隙磁壓降空載總磁壓降qq

14、=F .qFt1Q - Ft2qFj1Q Fj2Q空載磁化電流2 pFqq0.9miN1Kdp1定子電流標么值定子電流實際值l1=Il；lKW82.定子電流密度IiJ1a1 N t1 Ac183.線負荷mN Di184.轉子電流標么值轉子電流實際值miN iK dpiZ2端環電流實際值Z22二 p85.轉子電流密度導條電密I 2AB端環電密Jr86.定子電氣損耗Pcu1 -11 R1Pcu1 - P cu1 PN87.轉子電氣損耗*Pai 2 -* 2 *I2 R2*PAI2 二 PAl 2 PN88.雜散損耗鑄鋁轉子：p* =0.025（2 極），0.02 (4 極)，0.015 (6 極)

15、銅條轉子：*p =0.005或參考相近規格的實測值Ps 二 P；Pn89.機械損耗參考實際試驗值或按下列公式計算二極防護式：3 23Pfw =5.5()2(D2)3 10*23，0.01（ 8 極和 10 極）I RAR四極及以上防護式:P fw3 233= 6.5( ) (D2)10p二極封閉型自扇冷式:p fw= 13(1-D1)(3)2(D1)4 103p四極及以上封閉型自扇冷式:p fw弋臨4103機械損耗標么值pi二巴Pn90.定子鐵損耗定子齒重量Gt =2pAt1Lt1莓' 定子軛重量G4pAj1Lj1' ；-Fe' 定子齒損耗PFet = PhetGt損耗

16、系數Phet根據Bt10查表4得到 定子齒損耗卩尸引=PhejGj損耗系數Phej根據BjlO查表4得到定子鐵損耗Pf kiPFetk2PFej鐵耗校正系數心=2.5 （半閉口槽），3.0 （開口槽）k2 =2.0 （半閉口槽）2.5 （開口槽）定子鐵損耗標么值PFePFePn91.總損耗標么值=Pcu1PAl2PsPfwPFe92.輸入功率93.效率Pn1此值應與64項假定值相符，否則重新假定'并計算6493項，直至誤差小于土0.5%94.功率因數95.轉差率Pai 2Sn *1Pai 2Ps - Pfw PFerpFetr pFejrPFer = PN96.轉速nN97.最大轉矩T

17、m1 一 Sn*72*22(R1-R1X二)五. 起動性能計算起動電流假定值I st = (2.5 3.5)Tm I KW起動時定轉子槽磁勢平均值N s12 Z1Fst=lst s10.707(KU1 Kd1Kp1 -).J - ；0a1 Z298.99.100.101.102.103.104.105.106.107.空氣隙中漏磁場的虛擬磁密Bl2 二c起動時定子槽比漏磁導s1(st)二 Ku 1 ( U1 - U 1 ) K L< L1t2由Bl查圖18可得漏抗飽合系數Kz齒頂漏磁飽合引起的定子齒頂寬度的的減少Cs1 =(t1 b°1)(1 Kz)齒頂漏磁飽合引起的轉子齒頂寬

18、度的的減少Cs2 =(t2 b02)(1 Kz) ' U1的計算見附錄起動時定子槽漏抗X s1(st)s1 (st) *7 Xs1's1起動時定子諧波漏抗X &st)= K z X毎起動時定子漏抗X；：.1(st)=Xs1(st)X1(sXe1考慮集膚效應，轉子導條相對高度= 0.987 10hB式中：hB 轉子導條的高度，對鑄鋁轉子不包括槽口高度bBbs2轉子導條與轉子槽的寬度之比，對鑄鋁轉子其值為h°21，窄長的銅條其值為0.9B導條的電阻率。對 A、E、B 級絕緣，鋁為 0.0434 10 m，銅為 0.0217 10 m ；10 8.109.110.1

19、11.112.113.114.115.116.117.118.119.120.對 F、H 級絕緣，鋁為 0.049110- m，銅為 0.0245 10" mf 轉子電流頻率，起動時其等于定子電流的頻率轉子電阻增加系數和電抗減少系數Kf、Kx查圖15及圖16RXK FK xR。X。起動時轉子槽比漏磁導，s2（st） =（2 7% 2）Kx ' l2起動轉矩的倍數（： 'U2的計算見附錄一）起動時轉子槽漏抗*,-s2(st)*Xs2(st)X s2-s2起動時轉子諧波漏抗* *X 2(st)= KzX 2起動時轉子斜槽漏抗* *Xsk(st) K zX sk起動時轉子漏

20、抗* * *X 浮(st) = Xs2(st) ' X ;2(st)* *XE2 ' X sk(st)起動時總漏抗* * *(st)1(st)2( st)起動時轉子總電阻R2(st) =KF(lt2)'t2)RbRrIbIb起動時總電阻*RRRst12( st)起動時總阻抗2 * 2Zst =Rst' X ；pst)起動電流1 st -I KW *Zst此值應與98項假定值相符，否則重新假設并計算98118項，直至誤差小于土起動電流的倍數is1R2(st)*v(1 Sn)Zst3%六. 計算用圖七. 計算用表銅 鋁 導體標稱直徑mm標稱截面積2 mm銅鋁漆膜厚度

21、mm參考重量kg/km20 C時電阻Q m參考重量kg/km20 C時電阻Q 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 0.070.670.35263.2190.05111.0240.08270.04 0.08(0.69)0.37393.

22、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):0.46574.2500.03901.3700.06320.05 0.090.800.52274.6100.036

23、11.4830.05850.05 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 0.111.060.88258.5050.02062.6160.0

24、3330.06 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)1.651315.000.01094.7420.01760.06 0

25、.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 0.122.003.141628.210.00579.1400.00920.07 0.122.123.52

26、9931.520.00509.8510.00820.07 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 0.12QZ-2、QZL-2厚絕緣聚酯漆包圓線表1BT0.000.010.020.030.040.050.060.070.080.09B0.401.381.401.421.441.461.481.501.521.541.560.400.501.581.601.621.641.661.691.711

27、.741.761.780.500.601.811.841.861.891.911.941.972.002.032.060.600.702.102.132.162.202.242.282.322.362.402.450.700.802.502.552.602.652.702.762.812.872.932.990.800.903.063.133.193.263.333.413.493.573.653.740.901.003.833.924.014.114.224.334.444.564.674.801.001.104.935.075.215.365.525.685.846.006.166.331

28、.101.206.526.726.947.167.387.627.868.108.368.621.201.308.909.209.509.8010.110.510.911.311.712.11.301.4012.513.113.614.214.815.516.317.118.119.11.401.5020.121.222.423.725.026.728.530.432.635.11.501.6037.840.743.746.850.053.456.860.464.067.81.601.7072.076.480.885.490.295.01001051101161.701.80122128134

29、1401461521581651721801.80B25=1.54T(D23)表2電工硅鋼薄板（0.5mm）的磁化曲線B25=1.57T（D24）電工硅鋼薄板（0.5mm）的磁化曲線表3BT0.000.010.020.030.040.050.060.070.080.09BT0.401.371.381.401.421.441.461.481.501.521.540.400.501.561.581.601.621.641.661.681.701.721.750.500.601.771.791.811.841.871.891.921.941.972.000.600.702.032.062.092.1

30、22.162.202.232.272.312.350.700.802.392.432.482.522.572.622.672.732.792.850.800.902.912.973.033.103.173.243.313.393.473.550.901.003.633.713.793.883.974.064.164.264.374.481.001.104.604.724.865.005.145.295.445.605.765.921.101.206.106.286.466.656.857.057.257.467.687.901.201.308.148.408.688.969.269.589.8

31、610.210.611.01.301.4011.411.812.312.813.313.814.415.015.716.41.401.5017.218.018.919.920.922.123.525.026.828.61.501.6030.733.035.638.241.144.04750.053.557.51.601.7061.566.070.575.079.784.589.594.71001051.701.801101161221281341411481551621701.80Pio/5o=2.1W/kg(D23、D24)電工硅鋼薄板(0.5mm)的損耗曲線表4BT0.000.010.02

32、0.030.040.050.060.070.080.09BT0.500.700.720.740.760.780.800.820.840.870.890.500.600.910.930.960.981.011.031.061.081.111.130.600.701.161.191.221.251.281.311.341.371.401.430.700.801.461.491.521.561.591.621.651.681.721.750.800.901.781.811.841.881.911.941.972.002.042.070.901.002.102.142.192.232.282.322.

33、362.402.452.491.001.102.532.572.622.662.712.752.802.852.902.951.101.203.003.053.103.163.213.263.323.383.443.501.201.303.563.623.673.733.783.843.913.984.064.131.301.404.204.284.364.444.524.604.704.804.905.001.401.505.105.225.345.465.585.705.845.986.126.261.501.606.406.536.666.806.937.067.187.287.417.

34、521.601.707.647.707.777.837.907.968.008.048.078.111.701.808.158.248.338.428.518.608.708.808.909.001.801.909.109.209.309.409.509.609.749.8810.0010.201.90三相600相帶諧波比漏磁導系數 工S表5q=2315/64/6工s0.02650.02050.0199q=3318/97/96/9工s0.01290.01030.00900.0097q=4P 3111/1210/129/128/12工s0.00820.00660.00550.00540.0061

35、q=53114/1513/1512/1511/1510/15工s0.00590.00500.00380.00340.00380.0044q=63117/1815/1813/1812/1811/18工s0.00470.00380.00250.00290.00350.0035q=83122/2420/2418/2416/2415/24工s0.00350.00230.00160.00180.00270.00265籠形轉子諧波比漏磁導系數 工R表6Z2/2p345678910藝R0.0970.0530.0340.0230.0170.0130.0100.0083Z2/2p12152025304050oo

36、藝R0.00570.00360.00210.00130.00090.00050.00030定子槽的比漏磁導.轉子槽的比漏磁導附錄常用槽形比漏磁導計算對左圖：dr = h01 -boiboi +biiL1查圖72hiij1o.58m(boi對左圖：hoi 0.785boi'L1查圖7h010.58h11boiCsiCsi T.5boiCS1CsiO.5boi對左圖： U 2ho2bo2'L2查圖7對左圖：耐2 =o2bo2-_ 2hi2'U'L 'L查圖7ho2bo2Cs2(Cs2 bo2b02對左圖:12b22h02hi2h22L22hi2b02bl2

37、L查圖7ho2b02h02Cs2 s2 )Cs2 ' b02（鑄鋁轉子）0.58h12(CS2bo2Cs2 T.5bo2）（銅條轉子）對左圖：？叫2查圖12L2 -b°2b122h12扎L 俎查圖7 U2梨形槽時查圖12,其他槽形按選用的槽形查對應的公式和曲線U2（st）按l（St）的假定值查圖12對左圖:h02b02h02(CS2b02Cs2 b02，“L2 = ' hl；"h22 - h32丿小12132'(bo2h12Kr1人823人12心1aB+ A；23 應 K；1)b12當Abi << （ AB2 + AB3）時，可用近似計算:2 h12bo2 ' b|213,2',2 ho2"h22F(b12h22Kr2AB3h12Kr2Ab3K2)Abb22當Ab2<< (Abi+Ab3)時，可用近似計算:2h22bi2卜匕22式中：AB2(bo2 bi2)hi21AB2(bl2 b22)h1幅二尹32b42)h322AB23'AB3'AB222即得，L2(st)Kf1Ab1- (b12bpr ')hrKr、Kr'、K