三相异步电动机的运行原理课件.ppt

1、1234561E1E2E7011109.02IpkNmFw0F0I8 9101E20E11114.44wmEf N k201224.44wmEf N k ek2211201wwekNkNEEk11101xI jE1x1x101101011ZIExI jrIEU202EU1213 mZIE01)(101mZZIU14mmmZRjXmRmX15 161E1E2E2I1712160pnff21216060pfpfnn18 1I 1Fn n1 1=60=60f f1 1/p p 2Ef f2 2=pnpn/60=/60=pnpn1 1/60=/60=f f1 1 2I 2Fn n2 2=60=60f

2、f2 2/p p=n n1 11911 1EjI x 222EjI x 202 222EI rjI x111Zrjx2022Zrjx111 11 1111UEjI xI rEI Z 201F2F1F2FmF2112mFFF12()mFFF 111122112120.90.90.9222wwwmN kN kN kmmmIIIPPP22212121111wmwim N kIIIIIm N kk1211()mmLiIIIIIk 22111222wiwm N kkm N k121LiIIk 22212121111wmwim N kIIIIIm N kk1211()mmLiIIIIIk 23 mI LI

3、14.44wEfNK1mmI NR121/mimLIIIKII24222111,wwm NKm N K25112212220.90.922wwN kN kmmIIPP222111222wiwIIIm N kkm N k 26122222m E Im E I 21111122222221 2122222wwewwm m N kN km E IEEEk Em Im m N kN k 1122wewN kkN k27221 222 22m r Im r I 211122221222()weiwm N kmrrk k rmm N k 22222xxtgrr22eixk k x 281111122221

4、2121()0()()()mmmmmmUEI rjxEIrjxIIIEEEI zIrjx 2911111222212121()0()()()mmmmmmUEI rjxEIrjxIIIEEEI zIrjx 301I 1F 2E 2I3132111211()()6060p nnpn nnfsfn33n1F1n2nF2212116060fsfnsnnnPP34n1212116060fsfnsnnnPP352222204.44wmEf N ksE362222()EIrjx222122022xf Lsf Lsx3712()mFFF。1f21fsf38392F)(21FFFm sI2mF402022222

5、20sEEIrjxrjsx20220220()EIIrjxs202II41220EsE20E220 xsx20 x2r2/rs20220220()EIIrjxs2/rs2r422F2F222220.92wN KmFIp2F1122222/sxxtgtgrrs43频率折算后，转子电阻分解为两项：频率折算后，转子电阻分解为两项：2221rsrrss2/rs442(1)/s rs2221rsrrss2(1)/s rs2(1)/s rs2(1)/s rs4522221sm Irs2(1)/s rs2(1)/s rs461111122221212()0(/)()mmmUEI rjxEIrsjxIIIEE

6、I Z 47480s 1nn2(1)/s rs 20I mII 14922210,1,0,snsrxrs2I5022(1)/19s rsr0.05s 5152530290mE滞后(2)12222222222(3)/XIEtgR SEI RSjI X滞后相角22XI j 2I m2 1ESRI22 21EE与电机参数与电机参数作参考相量作参考相量已知：已知：)(m m1)4(E5422XI j 2I m2 1ESRI22 21EE1(5),mmmmEIIZ 超前的相位角等于铁耗角12(6)()mIII 111111)7(XIjRIEU 2I 1ImI11XIj 1 11RI 1U55565711212mmUIZ ZZZZ2111212ZCZUZZZIImm 21112211ZZCZUZZZIImmm mmXXZZC11111 58则则0,2121 ZZZZmmZCUI11 12112UIZC Z 59mmXXZZC11111 60本章内容结束本章内容结束谢谢大家谢谢大家