电机与拖动基础-(第四版)部分习题答案

1第三章直流电机原理习题3.1A1.9383.022017000NNNNUPImN2.108150026017000602170002NNNNnPTKWWPPNN48.209.2048183.01700013.3r/min1500nV95.2081500101.23603983602napNEamN3.1310101.23239832V65.69500101.2360398360r/min50022aaTMaIapNICTnapNEn3.4mN3.571000260600060260002NNNNnPT%8710895.66000mN77.31000260395W68955006395W639539560003100102PPpTPPPpPPNNNcuaMM51.03.31500A3.312206895,mN611000260639522211NcuaaaNcuaNNNNNMNIPRRIPUPIIUPPT3.6估算V20922095.0)97.0~93.0(NaNUE2mN6.4682701817.055.955.9minrV/1817.011502091NNeNNaNNeICTnECmin/r12101817.02200eNCUn两点座标(0,1210),(468.6,1150)可画出固有机械特性曲线。3.71minrV/2.010005.040220NaNNNenRIUCmin/r11002.02200NeNCUnmin/r100100011000NNnnnA20405.05.05.0min/r1050501100min/r505.05.000NNTNNTLaLNLLLNLICTCTInnnTTnnnTT第四章他励直流电动机的运行习题参考解4.1解：（1）A6.1496147.0220aNSRUINSaSSaSNSIIRIURIUR2V46.26147.0902075.1147.0902220)2(＝注：起动电流起动电压降压起动应串电阻电枢回路串电阻起动4.2解：（1）3mN5.2424.531.189mN4.534115006.20455.955.9mN1.189)2.145(15006.20455.955.955.9A2.145376.06.204150V6.204,150V6.204376.041220＝－－＝－动转矩－＝来不及变时LNNeNLaaeaaaTTICTTInEICTIEnVuERIEU(2)min/r7.98615006.204376.041150955eaaaaeLCRIUnIICTT不变故不变4.3解(1)min/r8.19271364.08.0376.062.25220A62.25mN7.261364.08.055.97.2655.91364.015006.204mN7.264.535.05.0eaaaaaeLeNLCRIUnIIICTTnECTT算得也即（2）min/r6.18391364.08.0376.024.51220A24.511364.08.055.94.5355.955.9mN4.53eaaeLaaeLNLCRIUnCTIICTTT4.4解：40min00min/r16131364.02201364.01500224.07.68220nnnCUnnRIUCeNNaaNNe＝＝韦伯735.0224.0224.01134844841129161311315001613)3(33.111291500)2(min/r1129)3.01(1613)1()1(maxmaxmin00minmax0minaanNaaNNRRnnRnnRRRnnnnnnnnDnn3470W735.07.68%7.64151158.9780W151157.682208.9780112960277.8260277.8215001300055.955.9)4(2max21212222RIPPIUPWnTTPmNnPTaNNNNN＝4.5解68.52641500)2(min/r2641137.376)1(min/r7.3763.0113min/r11315001613minNN0minminN0minN0NnnDnnnnnnnn＝53470W735.07.68%8.6435312287W35317.684.51W228726460277.8260277.82150013000955055.94(V4.5122016137.376(3)2max212112222min001min001RIPPIUPnTTPmNnP)TunnunnuuaNNNNNN＝4.6解：（1）min/r15004029.018.010322031,,)2(min/r98.12234029.018.0309220314029.050018.0103220A3093,31313131NeaaNeaNaaMNNLaNeaaNaNNeaNaNNLCRIUCEnCEIICEIPPPICRIUnnRIUCIITT太大不能长期运行，因为韦伯＝能长期运行，因为max,nnIIaNa。4.7解：6%8.27278.02505.69min/r5.1805.69250min/r5.6910005.1069min/r5.10694114.04404114.010004.411V4.411376.076440)1(min-0Nmaxmin-0minN00nnnnnnnnCUnnECRIUENeNNNNeaNNN＝＝韦伯韦伯＝恒功率负载2933.01500440A76)2(max0nUCIINeNamin/r7.14022933.0376.076440maxeaaCRIUn77.75.1807.1402)3(minmaxnnD4.8解：aaNNNaRIUUE94.0,0357.018511094.0110aNaNNaIEUR103.0100011094.0NaNNenEC韦伯609.00357.01858.1)0357.01858.0110(110)8.0()2(279.00357.01858.10357.01858.01108.0)1(maxmaxmaxaaaNNNaaaNNaNRIRIUURRIRIURIER反串能串mN8.167)6.170(103.055.955.9A6.170609.00357.01100,00,0)4(mN6.327)1858.1(103.055.955.9)3(maxICTRRUIEnTnICTTNeaNaNe＝对反接制动对能耗制动反串反能4.9解：73195.07.68220;)(;0;)(1377.01500195.07.68220aaNNNaNNeaNaNNeaNaNeNNaaNNNeRIURTICTIRRUnCIRRCUnnRIUC＝－＝韦伯4.10解：倒拉反接制动运行状态。韦伯2091.01000069.0158220NaaNNenRIUC第四象限，制动状态，A6.1107.07.0NaNLIITT96.2069.06.110115220V,115)550(2091.0aaNNeaRIEURnCE串4.11解：6.2605.16.238.212440)(805.16.238.212v8.212)380(56.0min/r380)3(r/min25.4456.005.15.298.08.0)2(min/r83056.005.16.23440A6.238.00,)1(56.073005.15.29440＋－倒拉反转－能耗：下放＝－能耗制动放下重物－＝时的求韦伯RIEURRIERnCEnCRInCRICUnIInRUUnRIUCaNaaNeNeaNNeaaNeNaNaNNNaaNNNe4.12解：8KW4.2660440v5.463)1187(3905.08.223603905.055.955.9min/r11873905.0393.060440V410393.02.764403905.01050393.02.76440)1(1aNNeaNeNeaaNeNaaNNNNaNNNeIUPnCEmNICTCRICUnRIUEnRIUC－＝韦伯KW616.556.16056.1393.06015.117v15.117)300(3905.0)2(22cuRRIPRIERnCEaaaNe－KW89.4447.1260KW4.266044047.12393.060332440)(v332)850(3905.0)3(22cuR1RIPUIPRIEURnCEaaae＋r/min47718585.01035.0314.00虚稳态点的转速为314.01858.15.1048.1为制动时电枢回路总电阻V5.1046.10091035.0电动势为制动前电动机电枢感应r/min6.10091035.0035.018585.011085.085.0minV/r1035.01000035.0185110能耗制动13.4085.01-aNaNLNaaaNaNNFNaNLNaNNNICeRRCeUnIERRnCeECeRIUnIITTRIUCen9)349.085.085.08.1307.0(349.04774776.1009307.0307.021035.055.9314.03753025.12)(55.93752max000sIIIInIIIInTtsInnnnInTtsCeaRRGDTNNNaaMLLFMM或)253.085.08.17085.08.16295.08.170644.01100:(253.02.20412.20416.10096295.06295.021035.055.9644.03753025.12)(55.93752r/min2.204118585.01035.0644.01035.0110644.01858.15.1041108.1max000sIIIInIIIInTtARRUInsInnnnInTtsCeaRRGDTICeRRCeUnIEURRNNNaaMaaLLFMMaNaNLNaNa