(整理)发电机电磁计算

1、精品文档精品文档UUN600VnN1500r/min/50HZcos.=0.8I80ANm=3凸极同步发电机电磁计算公式5.1额定数据和主要尺寸1额定电压2额定转速3额定频率4额定功率因数5额定电流6相数7确定功率：pJ3600B80B0.8H.173.16kw8.根据功率取对应T2X-250L电机，额定功率p75kwN9效率91.4%10极数11计算功率：2p曳BIE04n1500NpKP108175cos0.8101.25kw式中K1.08(对于同步发电机取值)E12.极弧系数：极弧长度b(0.630.72户p取,=bp0.67pTOC o 1-5 h z、I*,13气隙磁密B.(01.7

2、07取B.0.8T14.取线负荷A28(KA/m28ACm6.1IE03D26.1IE03D2jfilKKABnpBdp1N.6.1H103H101.25H1030.67Hl.110.92280000.8H150027.1H10ibm316.主要尺寸比：0.62.517定子铁心内径取值范围Du-3Dfp(2760.5在23990.3860m18.定子铁心铁外径：D1.42D1.4210.2399.0.3407m1i1按标准选取D430mm1D430则定子内径：DJk2由302.82cm300mm.19定子铁心有效长度：llefD2llefD2叱27.1004D20.320.3011m300mm

3、i120定子铁心净长度：lK-nbK300B0.92276mmFetFetkkFet式中k=0.92（对0.5mm厚硅钢片）Fet在对发电机的计算中,nb不计入1中kkFet本次设计选用的硅钢片型号为：DR530-50对应的老牌号为D2221.磁极铁心总长度：11300mmmef22磁极铁心净长度：1K0.95H3028.5cmFemFemm式中K=0.95(对于17.5mm厚钢片)Fem23极距D30023.极距：.n1235.5mm2p424.圆周速度：f_!_23.55m/s100025气隙长度：最小气隙：(0.250.30)的？K4c3mm6(0.250.30)280相，55B0.51

4、.03033mm61.1mm最大气隙：1.51.65mmM26铁心的计算长度：ll2BH3002H.130.22cmi5.2每极每相槽数：q4定子槽数：Z12pmq41314每极每相槽数：q4取绕组节距比：56绕组节距：yq5B3B41066绕组短距系数（基波）：Ksin（上）0.966P2.sin绕组分布系数（基波）：K2m0.958dqinmq绕组系数（基波）：KKK,925dppd预计每极磁通B.0.8B0.67B0.2355B0.303.79H0吨wbpe35.每相串联匝数初值U/0.0213a(75町a/U600IN每极电枢反应磁动势：厂.0.45mlNK0.45H3B80B88B0

5、.925.FndpI2197.8Aa2p4电枢反应直轴折算磁动势：FKIF0.9092197.81997.8Aadada电枢反应交轴折算磁动势：FKF0.522197.81142.856Aaqaqa122.直轴电枢反应电抗：X*adFX*adFadFF2.1997.8733.5138.962.2898123123.交流电枢反应电抗:5.6X*aqFaqFFH2.1142.856733.5H138.961.3099直轴同步电抗:5.6X*aqFaqFFH2.1142.856733.5H138.961.3099直轴同步电抗:X*X*X*2.28980.04242.3322dads交轴同步电抗:X*

6、X*X*1.30990.04241.3523qaqs短路比：K*F01205.80.603cF1997.8ad内功率因数角：sinX*0.6H1.3523IarctgqIarctgI67.18cosR*10.80.0213a额定功角：67.1836.8730.31-则：coscos30.310.863.额定负载时内电动势:E*1R.osX*sin(X*cosE*1R.10.0213B0.80.0424B0.6(0.0424B0.80.0213H0.6)=1.04248j0.021141.04271.16.额定工况时磁路计算：E1.04273.88H0配4.046H0也wbNBEEB1.0427

7、B0.77880.812TNIBEIB1.0427B1.49281.5565TtsNtts当B1.8T时BB1.5565TtsNtsNtsNBEB1.04271.51811.5829TjsNijsFEF1.0427733.5764.82ANiFhH1.42B40.3257.25AtsNtstsN式中H对应于B查磁化曲线B=1.48T得H40.32tsNtsN25tsNFlH14.9947.870.305218.86AjsNjsjsNN式中H对应于B查磁化曲线B=1.48T得H47.87jsNjsN25jsN查资料中小型电机设计手册得0.305NNFFFF1040.93AtjNNtsNjsN*H

8、0”153.428B040.93H0”0.1597H0勘WbNtjN0.1597IH0n0.1597IH0n4.046IH0iE1.0395(.0.1597)H0h4.2057H0hWbmNNNB044.205701cB041.5433TmNs272.52mBBn044.20570n041.5858TjrN2hl2H4.25H31.2jrrBBmm044.20570-H041.5238T2nl30H9.2mmFhH4.35732.336140.88AmNmmN式中H对应于B查磁化曲线B好=1.48T得H32.336mNmN25mNFlH4.28648.74208.90AjrNjrjrN式中H对

9、应于B查磁化曲线B=1.48T得H48.74jrNjrN25jrNF0.8BB1040.8B0.009B1.5238B104109.71A2N22N131额定负载时每极磁压降：F1.1(FFFF)1500.42AeitjNjINmN2N132额定负载时励磁磁动势：F1.05F1B(fNF1.05F1B(fNeiFF1ad-)22ad-Ifcin(l92eiei=1.05B1500.42111(1857.10)2.2.1857.101500.422=1.05B1500.42111(1857.10)2.2.1857.101500.4221500.42in38-2=3172.85A.取励磁绕组每极匝

10、数：wf160匝.额定励磁电流：IFN3172.8519.83AfNw160f.空载励磁电流：IF01205.87.536Af0W160f.取励磁电流电密（取值）：/3.8A/mm2、f(j3.85.5A/mm2)f.励磁绕组导线截面积：qLfjf励磁绕组线规：ab3.55H.519.835.22mm23.8图5.6励磁线圈尺寸励磁线圈的尺寸如图5.6所示：139.第n层线圈平均匝长度：l2QHW(rJ2nH，b)fnmmm2=29.16+28+(0.51(n0.5).5)=72.81+9.42n式中W线圈框架直线长度mQ线圈框架直线宽度mr框架圆角半径mb导线长边尺寸n=1为第一层n=2为第

11、二层140励磁绕组平均匝长度：nllff90.87cmcWfn第n层线圈匝数f141励磁绕组电阻：0.0217H2pWl.0.0217*H60H90.87.Rj2.4176f（75）100q100H5.22f142额定励磁电压：UUIR0.619.83B1.152.41760.655.732VfNfN（fx）0.6V为电刷压降，励磁绕组取B级绝缘励磁绕组E级绝缘R-5=1.13Rfz）（f11C5）f（75C）励磁绕组B级绝缘R-0=1.15Rf35c（f12C0）f（75C）励磁绕组F级绝缘R-0=1.244R（75C（f15C0）f（75C）143空载励磁电压：UIR0.67.536B1.

12、9920.615.6Vf0f0（f200）Rf200.824Rf750.824H2.41761.992TOC o 1-5 h zrff144电压调整率:IUEnU1K00%607.600o。U600N=1%式中：E34.44fNK=、3B4.44B50B0.925B0.0388B44607VoNdp5.7145.每极阻尼笼条数：n5d146每极定子绕组截面积：QmqNNq343H12.0106796.1976mm2atsa147每根阻尼条截面积：Q796.1976s0.20.231.848mm2dn5d148阻尼条直径：s31.848d1.131d1.130.63cmTOC o 1-5 h z

13、y100100149阻尼槽节距：d11(1-1.5)tpydn1d0.8tt0.9tsds1.1tt1.2tsds2.2355-2.3188cm.0.66B23.55H0.63(2.2355-2.3188cm6取t=2.25cmd150阻尼笼最大磁密：BBBBtdmli-Nt1.1dldyFem.0.812B2.25j0.222.251.1B0.6328.51.2442T1.8T151端环尺寸()151端环尺寸()：a2dyyb0.75dyy取1.5cm取0.5cm图5.7图5.7端环尺寸5.8hihi.定子齿钢片重：GZlhb7.7B10，t1Fetts、ts(3)二48BE7.6H1.42

14、M.121B7.7H0*=16.238kg.定子轭钢片重：G(Dh)hlB7.7，0，js1jsjsFet(434.8)B4.827.6B7.7H0，=122.358kg.材料单位损耗：*/5025攻/kg(查资料可得).齿部单位损耗:pPB26.05W/kgt10/50tsN.轭部单位损耗：ppb26.26W/kgjs10/50jsN157定子铁损耗：PKpGKpGFetttjsj2H6.05H16.238H1.5H6.26H122.3581345.42W式中.磁极单位表面损耗：,Zn、PK()1.5(Bt0)2bmbm100000s2产789625喊M71.50/帆2式中：K2（钢片厚1m

15、m）bm0.205空.BKB0.205B1.07B0.8120.178ooHN.磁极表面损耗:P2pPH0Febpmbm4B0.6623.55B30H471.5H087.94W.定子绕组铜损耗：Pml2R3B802B0.09221770.24WCu1N(x)RE,B级绝缘式中Ra(x)品。5、*H级绝缘a(115161.励磁损耗:161.励磁损耗:12R0.61PfNf(x)fN.Cuf.19.8322.41760.6B19.83091069.52WRBIE,B级绝缘式中RB|f(75-f(x)意F,H级绝缘f(115Hf励磁系统的效率162.机械损耗:Pmex16162.机械损耗:Pmex1

16、6p()340=32(25)340259.396W163.附加损耗:Pad163.附加损耗:Pad0030.012反000cosI0.81125W164总损耗：PPPPPP乃债7.516WFeFeb1Cucufmexad165效率：(1P)00%92.92%P1PN5.9166.励磁绕组漏抗：F_4_X*6.4K2li一0”(BKH)X*TOC o 1-5 h zfsadfs.adad2197.8/4、6.4H0.8452B30.22H0.794-(H0.845Hl)H2.2893.88H00.4hh2h0.5bTOC o 1-5 h zm-pmmmfs3aa4lmpm.5.7595.1.61

17、.式中3B7.683.9334H30167167168励磁绕组电抗：X*X*X*0.42.28982.6898ffsad阻尼绕组直轴电抗：7.9Fli7.92197.8K0.22X*a-H0”H0”印.330.03597dsnds5H3.88H0dhn式中0.623f0.06d1.33dsblmi169阻尼绕组横轴电抗（对于全阻尼）：X*0.75X*0.75B0.035970.02697qsds170直轴瞬态电抗：XX*ad*fs0.04242.2898皿40.3829dsX*2.6898f.交轴瞬态电抗：XX*1.3099qq.直轴超瞬态电抗：xX*1ds1.1.1X*X*X*adfsds0

18、.424313=0.0749_12.28980.40.03597173.交轴超瞬态电抗：x-X*14s1.1XXa44s=0.042411_1=0.06881.30990.02697174.励磁绕组电阻：R44|KdH02ffqwff竺.0.845242197.8皿）。.-505.22H0*1603.88H0175励磁绕组时间常数：T*f_2.6898_0.0221sd02fR100HH0.387f176瞬变电流时间常数：TdTX0.0221H0.329dodX*2.3322d0.003123s177超瞬变电流时间常数：TV.1T0.0010297sd8d178.负序电抗：XX*”0.07490.06880.07182ddq179直流分量时间常数：X0.0718T2a2-fR100BH0.0922a(750.00248s180.空载励磁持续短路电流倍数：f.K.0,603k0c181额定励磁持续短路电流倍数：F3172.85fNIkNF1997.8ad