中小型三相感应电动机(单笼转子)电磁计算程序资料讲解

中小型三相感应电动机(单笼转子)电磁计算程序理员删除 中小型三相感应电动机(单笼转子)电磁计算程序UP3．功电流I1N0Zp12p8．定转子每极槽数Zp12pZp22p9．p22p=i12pDD12．定转子齿距t=i1t=DD1Z2Z2NZN=s1101ma11 17．绕组线规(估算)N'A'I'111⑴槽面积A2rb2111(h'h)rs2s2⑵槽绝缘占面积双层绕组A(2h'r2rb)tts212111单层绕组A(2h'r)tts21⑶槽有效面积AAAefstfA铁心长lt铁心有效长无径向通风道ll2eft定转子径向通风道不交错llnb'll(nb'nb')sftv1v1v2v2v净铁长无径向通风道lklFeFet有径向通风道lk(lnb)FeFetvv20．绕组系数KKKdp1d1p1⑴分布系数距系数KKd112Ksinp12DDrDDr2NK01dp1E其中E=(1')U(假设K'=1')1LN0EL23．每极齿部截面积定子A=KlbZt1Fett1p1转子A=KlbZbt取离最窄齿三分之一齿高处的齿24．轭部截面积A=Klh'j1Fetj1定子轭部计算高度DDr圆底槽h'=1i1hDDrj12s13平底槽h'=DD1i1hj12s1转子A=Klh'j1Fetj2转子轭部计算高度圆底槽h'=2i2h+22dj22s233v2DD2平底槽h'=2i2hDD2j22s23v2DD6efB26．波幅系数Fs=B6(可先假定饱合系数K’s，再从图2中查出Fs)t1At2A开口槽K=开口槽K=010B=10j12Aj1B=B=.j22Aj2F0B=s6AHtHH1定子圆底槽L=h+h+rt11121321半开口平底槽L=h+ht11121开口平底槽L=ht1s11转子圆底槽L=h+h+rt21222322平底槽L=h+h几(Dh')134．轭部磁路计算长度定子L'=1j1j12p2几(Dh')1转子L'=2j2j22p235．有效气隙长度6=KK6ef6162半闭口槽和半开口槽K=6t(4.46+0.75b)b200t(56+b)6t(56+b)b200转子F=HLF=HLt1t1t1轭部磁压降定子F=CHL'j1j1j1j1I*=I*=m转子F=CHL'j2j2j2j2K6F6=660饱合系数K=sF6 sss总磁压降F=F+F+F+F+F06t1t2j1j2满载磁化电流I=2pF0m0.9mNKImmI1X*=msI*m44．线圈平均半匝长(见图4)单层线圈l=l+KTcBcy双层线圈l=l+2CcBs式中l=l+2d为直线部分长(d=0.01~0.03m，为线圈直线部分伸出铁心Bt11s2cosab+2r+2b21t1 y2p双层线圈端部轴向投影长fCsinds单层线圈端部平均长l2dKE1cy漏抗系数Cx4f(NK)2lPKK从附录一中查出L12mpl'1t1s1CxZK2l无径向通风道时l'lt1t1有径向通风道时l'lnb"(b"是通风道损失宽度，从图10查出)t1t1v1bv1v1子谐波漏抗定子端部漏抗X*ms1Cx(s从图13或表5中查出)12K2K双层叠绕组单层同心式1.2(d0.5f)X*1dCxE1lE1lK2单层同心式(分组的)、交叉式E1lK2X*0.2lECxE1lK2X*X*X*X*1s11E153．转子槽比漏磁导(、从附录一查出)sULU2L2s2ZlX*=0.5(bsk)2X*skt622v转子端部漏抗转子斜槽漏抗 s262E2skXX ((1(21NA'IN0定子导线重量G=ClNZA'Np'wcs11c1t1G=Kl(D+6)2p'(6为冲剪余量，取5mm)FeFet1FeB2 I导条电阻标么值R*=R'KWBBUN0I端环电阻标么值R*=R'KWRRUN02BR164．满载时定子电流有功分量标么值I*=(假定效率n')1Pn'IX1(1P1(1PX* (=1+(1X*1QmXXEL1P11Q(10m(1 压降LLB=0BLB=0BLB=0BLF=HLt10t10t1F=HLF=HL'j10j10j1F=HL'j20j20j2K6BF=6600FF=F+F+F+F+F0060t10t20j10j202pFI2pFI=00m0.9mNK81．定子电流标么值I*=I*2+I*21P1QI=I*IKWIJ=11aNA'1t1c1mNIA=1011i1I*2+I*2+I*21PX2I=I2I=I2端环电密J=RRAp*=fw22KWZ2Z转子电流密度导条电密J=I2BABIR定子电气损耗p*=I*2R*p=p*Pcu1cu1N转子电气损耗P*=I*2R*p=p*PAlAl2Al2N或参考相近规格的实测值p=p*PssN二极防护式：参考实际试验值或按下列公式计算pp=5.5()2(D)3103fwp2fwp2二极封闭型自扇冷式：p=13(1一D)()2(D)4103fw1p1Dfwp1pfwPN ⑴定子齿重量⑵定子轭重量⑶定子齿损耗⑷定子齿损耗⑸定子铁损耗G=2pALp'tt1t1FeG=4pAL'p'jj1j1Fep=pGFethettp=pGFejhejjp=kp+kpFe1Fet2Fejhett10损耗系数p根据B查表4得到hejj10铁耗校正系数k=2.5(半闭口槽)，3.0(开口槽)1k=2.02定子铁损耗标么值 (半闭口槽)2.5(开口槽)pp*=FeFePN总损耗标么值N1p*=p*+p*+p*+p*+p*cu1Al2sfwFe1n=P*N1I*I*I*1转差率s=p*Al2N1+p*+p*+p*+p*Al2sfwFerp+pp*=FetrFejrFerPN转速nN=60f(1s)pNT*=m2(R*+R*2+X*2) stmKWFI'FI's10.707(KK2K1)1ststaU1d1p1Z012L2ccc2齿顶漏磁饱合引起的定子齿顶宽度的的减少C(tb)(1K)s1101z的减少C(tb)(1K)s2202z的计算见附录一K()Ks1(st)U1U1U1L1L1s1X*KX*起动时定子漏抗X*X*X*X*stsststE1bbBBBB理员删除2(st)FllBRBBB为bBRXK=~K=~FRxX00 入X*=KX起动时转子斜槽漏抗X*=KX*起动时转子漏抗X*=X*+X*+X*+X* (st)s2(st)62(st)E2sk(st)起动时总漏抗X*=X*+X* ((st)(1(st)(2(st)起动时总电阻R*=R*+R*st12(st)起动时总阻抗Z*=R*2+X*2stst((st)II=KW理员删除i=sti=stIstI1stZ*2N 理员删除 理员删除 理员删除 阻阻铜铝积 mBBTBTBTBT BBs111βββ 理员删除bb111βββR表63456789∞0槽形比漏磁导计算hh2hhChhh01b01b11hh01b01b01+11bb+b011111(s1)s101hrbbbhrbbb bhhhL2rrU2bC+bbhhh0212入=02入=02(s2)U2bC+bLLhL2b+bLhhh入=02入=02(s2)(铸铝转子)22U2bC+b入=0212(入=0212(s2)(铜条转子)U2bC+1.5b对左图：入查图12LLL2b+bL0212查对应的公式和曲线理员删除bhbhbbhbhb b入=02(s2)U2bC+bL2122232112hrhprb12b22bbx入h=(bh3K+Ah2K'12A20212r1B2312r1Bb +A2h12K")AB2+ABAB2+AB3)时，可用近似计算：入h=2h1212b+b0212入h22=1(bh3K+Ah2K'+A2h22K")A21222r2B312r2B3br2B22AB1+A入h=2h2222b+bA23232r3B式中：A=(b+b)hB12021212A=(b+b)hB22122222A=(b+b)hB32324232A=A+ABA=A+A+ABB1B2B3rrrK和入的计算方法如下：FL2(st)计算起动电阻时，等效槽高h=KprKaF计算起动电抗时，等效槽高h=(h+h+h)KKpx122232xab2K为截面宽度突变修正系数，查图112a理员删除理员删除 ⑴KF的计算pr1111AK=BFA+A+1(b+b)hB1B11pr31rbbbb)(h+h+hh)pr41h3141111131prh=h(h+h)rpr11