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当前位置:首页 > 建筑/环境 > 电气安装工程 > (整理)发电机电磁计算.
精品文档精品文档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UNV6002.额定转速nN1500/minr3.额定频率ƒHZ504.额定功率因数cos=0.85.额定电流80NIA6.相数m=37.确定功率:3600800.81.173.16Pkw8.根据功率取对应T2X-250L电机,额定功率75NPkw9.效率91.4%10.极数2p1201205041500Nfn11.计算功率:'1.0875101.25cos0.8ENKPPkw式中1.08EK(对于同步发电机取值)12.极弧系数:极弧长度(0.630.72)pb~取'p=0.67pb13.气隙磁密(0.71.07)BT~取0.8BT14.取线负荷280/280/AKAmAcm15.电机的计算体积3'2'16.110ilpBdpNPDlefKKABn33336.110101.25100.671.110.92280000.8150027.110m精品文档精品文档16.主要尺寸比:0.62.5~17.定子铁心内径取值范围232ilefilDlpD3327.11040.23990.38600.6m~~2.518.定子铁心铁外径:111.421.420.23990.3407iDDm~0.3860~0.5481按标准选取1430Dmm则定子内径:11430302.823001.421.42iDDcmmm19.定子铁心有效长度:23122127.1100.30113000.3iiDlefllefmmmD20.定子铁心净长度:3000.92276FetFetkkFetlKlnbKlmm式中FetK=0.92(对0.5mm厚硅钢片)在对发电机的计算中,kknb不计入Fetl中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:300mefllmm22.磁极铁心净长度:0.953028.5FemFemmlKlcm式中FemK=0.95(对于11.5mm~厚钢片)23.极距:1300235.524iDmmp24.圆周速度:223.55/1000fms25.气隙长度:最小气隙:cKBA)~(30.025.028023.550.250.300.51.03030.8mm(~)~1.2364精品文档精品文档取1.1mm最大气隙:1.51.65Mmm26.铁心的计算长度:230021.130.22illcm5.2定子绕组27.每极每相槽数:4q28.定子槽数:槽4843421pmqZ29.取绕组节距比:6530.绕组节距:1043651mqy31.绕组短距系数(基波):sin0.9662pK()32.绕组分布系数(基波):sin20.958sin2dmKqmq33.绕组系数(基波):0.925dppdKKK34.预计每极磁通''20.80.670.23550.303.7910pefBlwb35.每相串联匝数初值''21/3600/344.5444.444.44500.9253.7910NdpUNfK取匝36.取并联支路数2a37.每槽导线数:'12223441148SamNNZ取11sN38.每相串联导体数:1148118832sZNNma88442N匝39.线负荷:A=1138880224.2/3.1430NimNIAcmD精品文档精品文档5.3定子槽型尺寸(选取梨型槽)40.选定槽口尺寸:0120.30.130sosossbcmhcmhmh、、=0.15c、=1.1cm、齿靴角41.定子齿距:11301.962548isDtcmZ11111123020.10.151.995248iossDhhtcmZ1111122123020.10.151.12.13948iosssDhhhtcmZ1111121()1322300.10.151.1332.02148iosssDhhhtcmZ42.定子齿宽度:111.96250.81.06661.21890.92(1.401.60)stFettBbcmKB~~式中:FeK:铁心叠压系数,取0.921tB:定子齿磁密,取1.401.60T~取11.1tbcm43.槽形尺寸如图5.1:精品文档精品文档图5.1定子槽形尺寸1111.99521.10.89520.9sstbtbcmcm1211800.901801.10.522248sssbRhtgtgcmZ2222.1391.041.099tssbtRcm111()()332.0210.901.121stssbtbcm则定子齿计算宽度:'2121.09921.11.1033tttsbbbcm44.定子槽深:121.87ssossshhhhRcm45.槽面积,取槽锲厚度0.25hcm,如图5.2所示:图5.2定子槽尺寸精品文档精品文档2112222ssssssRbRAhhh()220.520.900.521.250.2522()=21.39cm46.槽绝缘面积取:0.03icm1212()2iissssAhhRb+0.030.9021.25+(2+)0.52=20.182cm21.390.1821.21sefsiAAAcm取槽满率为75%,绕组并绕根数为3tN则绝缘导线直径:1175%1.210.750.1658311seftsAdcmNN查表取铜对应的标称线规QZ:标称导线直径d=1.60mm漆膜厚度0.06——0.1147.定子导线截面积(查表得):22.0106aqmm48.定子绕组电密:2806.63/232.0106NataIjAmmaNq49.发热参数:224.206.631486.45/jaAAjAcm5.4磁路计算50.定子齿计算高度:'120.521.251.4233stsssRhhhcm51.定子轭高度:112ijssDDhh43301.874.632cm52.定子轭计算高度:'13jsjsshhR0.524.634.803cm精品文档精品文档53.定子轭磁路长度:'1434.814.9948jslDhcmpjs()()54.极靴宽度:'011802sin2ppimbDp()00.6718020.165sin14.8354cm(30)55.磁极偏心距:]cos22[21111)()())((miimimDDDH其中11arcsin302pimbD0.552.753003002[1.11.65cos30]22(300)()()=4.00mm56.极靴圆弧半径13004.001.1144.922ipDRHmm57.极靴边缘高度:'2.5phmm(设计时取值)58.极靴中心高度:'111cos22iippmDDhh()-()=3003002.51.11.65cos3022()()=22.93mm59.初取漏磁系数:3'101.110111.0470.235560.磁极宽度(磁极尺寸如图5.3所示):''424101.0473.8810109.2028.51.55mFemmbcmlB61.转子轭内径:808()irDmmcm取值62.转子轭外径:16516.5jrDmmcm63.磁极中心高:pjrimhDDh)(121116.52.2930.112(30)精品文档精品文档=4.357cm64.磁极侧高度:'21cos2jrmmDhh()式中29.2arcsinarcsin33.8916.5mjrbD16.54.3571cos33.892()=5.7595cm65.转子轭高度:16.584.2522jrirjrDDhcm66.转子轭计算高度:'*12jrirjrDDhiirD2.2,4;6;8*........6;8;10pi=14.255.586图5.3磁极尺寸67.转子轭磁路长度:'4jrjrjrlDhp()=16555.84.2861c8m()精品文档精品文档68.转子轭轴向长度:31.2rlcm69.磁极与轭间残隙:222300.8100.8100.09300300mlcm()()70.实际极弧系数:2arcsin2180ppppbRR=14.835214.49arcsin214.4923.55180。=0.6671.气隙比:5.1m72.最小气隙比极距:0.110.0046723.5573.基波磁场幅度系数:1111.0836aAB(查交流电机设计手册)74.三次谐波磁场幅度系数:31330.60.04855aaAB()75.磁场分布系数:13210.73dfaa()76.磁场波形系数:11.09462bdaff77.直轴电枢反应磁场幅度系数:10.9856dddAAB(查交流电机设计手册)78.交轴电枢反应磁场幅度系数:10.52qqqAAB(查交流电机设计手册)79.电枢磁动势直轴折算系数:110.909dadAKa80.电枢磁动势交轴折算系数:110.4799qaqAKa81.定子卡氏系数(对于半闭口半开口槽):so1224.440.7519.6254.441.10.7534.440.7519.6254.441.10.7533ssossotbKtbb()()()()-=1.0782.阻尼笼卡氏系数(阻尼笼尺寸如图5.4所示):精品文档精品文档224.440.7514.44dddddtbKtbb()()图5.4阻尼笼尺寸83.卡氏系数:121.07KKK84.空载每极总磁通:260033.8810221.0946500.92588NbdpUwbffkN85.气隙磁密(最大值):2443.881010100.778823.5530.220.7idBTlf86.定子视在齿磁密:'1()31.962530.220.77881.49281.12127.6sitsFettstlBBTbl查表:'tsB≤1.8T则tsB='tsB=1.4928T87.定子轭磁密:2443.881010101.5181224.6327.6jsjsFetBThl88.气隙磁压降:40.810FkB=40.80.111.070.77910733.5A89.定子齿磁压降:'1.4226.84838.124tststsFhHA式中tsH对应于tsB,查磁化曲线B25=1.48T得tsH=26.84890.定子轭磁压降:14.9931.1580.324151.327jsjsjsFlHA式中:为轭部修正系数=0.324精品文档精品文档jsH对应于jsB,查磁化曲线B25=1.48T得jsH=
本文标题:(整理)发电机电磁计算.
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