電機(jī)設(shè)計(jì)計(jì)算常用公式

1、電機(jī)設(shè)計(jì)計(jì)算常用公式1輸出功率P22. 外施相電壓U13. 功電流IKW4. 效率耳5. 功率因數(shù)cos06. 極數(shù)p7定子槽數(shù)Q1轉(zhuǎn)子槽數(shù)Q28. 定子每極槽數(shù)轉(zhuǎn)子每極槽數(shù)9. 定轉(zhuǎn)子沖片尺寸見(jiàn)圖10. 極距PP11 .定子齒距t112 .轉(zhuǎn)子齒距t213 .節(jié)距y14轉(zhuǎn)子斜槽寬BSK15. 每槽導(dǎo)體數(shù)Z116. 每相串聯(lián)導(dǎo)體數(shù)Z機(jī)式中：P2U1TP-103二2kwm-U11cos0Q2P1P2p兀DT=i1Pp兀Dt=22Q2yBSK11a=117繞組線規(guī)（估算）N-S111a-A11KWmcos申13式中：導(dǎo)線并繞根數(shù)截面積ffN-S11查表取NS11定子電流初步估算值定子電流密度A11

2、8槽滿率（1）槽面積II=KW1COS0fA12R+bS12S=Cf2h+nR+2R+biiVSS1丿2）槽絕緣占面積3）槽有效面積4）槽滿率SiN-Z-d2iiSeCidh無(wú)徑向通風(fēng)道l=l+2geff無(wú)徑向通風(fēng)道l=K-1FeFe絕緣厚度Ci導(dǎo)體絕緣后外徑d槽契厚度h19. 鐵心長(zhǎng)l鐵心有效長(zhǎng)凈鐵心長(zhǎng)Kd1鐵心壓裝系數(shù)KFe20. 繞組系數(shù)（1）分布系數(shù)FeK=KKdp1d1p1.faSinqV21qSini2式中：q1p兀a二-tQ1（2）短距系數(shù)式中：21每相有效串聯(lián)導(dǎo)體數(shù)（二）磁路計(jì)算22每極磁通式中：23齒部截面積（1）定子（2）轉(zhuǎn)子24軛部截面積（1）定子式中：定子軛部磁路計(jì)算高

3、度hC1圓底槽:（2）轉(zhuǎn)子轉(zhuǎn)子軛部磁路計(jì)算高度hC2平底槽25空氣隙面積26波幅系數(shù)27定子齒磁密Kp1=sinCyTp1ZK1dpi-90o1Kdp1E108=12.22fZK1dp1(fE=1-U1VL丿1S=blQT1T1FeP1S=blQT2T2FeP2S=hlC1C1FefD一Dh=ia一h+RC12S3Sf=hflC2C2FefD一D2hfc厶-h一一dC22R3K2S=TlgpeffF=最大s平均B=F-T1SS28轉(zhuǎn)子齒磁密29定子軛磁密30轉(zhuǎn)子軛磁密31空氣隙磁密32.查附錄VI得33齒部磁路計(jì)算長(zhǎng)度定子圓底槽轉(zhuǎn)子平底槽34. 軛部磁路計(jì)算長(zhǎng)度定子轉(zhuǎn)子35. 有效氣隙長(zhǎng)度式中

4、：定、轉(zhuǎn)子卡氏系數(shù)K、KC1C2半閉口槽和半開口槽式中：齒距t槽口寬boBT2C1BC20二F-sST2102SC1102SC2atatatatT1T2C1C2hT1=hS1+hS2+3Rh=h+hT2R1R2C1C1lC22p=gKKC1C2KC1K=C2t(4.4g+0.75b)t(4.4g+0.75b)-b2oot(4.4g+0.75b)t(4.4g+0.75b)-b2oo36齒部所需安匝定子轉(zhuǎn)子37軛部所需安匝定子軛部磁路長(zhǎng)度校正系數(shù)C1轉(zhuǎn)子ATT1=atT1T1ATT2ATC1ATC2=atT2-hT2=C-at1C1=C-at2C2+ATg校正系數(shù)C238空氣隙所需安匝39飽和系數(shù)

5、40總安匝41滿載磁化電流42滿載磁化電流標(biāo)么值43激磁電抗（三）參數(shù)計(jì)算44線圈平均半匝長(zhǎng)（估算）雙層線圈式中：C2AT=0.8BgggeAT+AT+ATFT1T2gtATgATAT+AT+AT+ATT1T2C1C22.22ATpImmZK1血dpiimmIKWlL+2CZBSL（直線部分長(zhǎng)）-l+2dB1TCS2cosa兀d+2（h+h）+h+T注SOS4S2Ypd1式中：cosa=1sin2a.b+2Rsina=s-b+2R+2bS1T145雙層線圈端部軸向投影長(zhǎng)47漏抗系數(shù)48定子槽單位漏磁導(dǎo)式中：49定子槽漏抗式中：50定子諧波漏抗式中：51定子端部漏抗52定子漏抗53轉(zhuǎn)子槽單位漏磁

6、導(dǎo)式中：54轉(zhuǎn)子槽漏抗-C-sinaS2.63f.P.lZK=2_efdpip.U2.1051九S1=K九+K九U1U1L1L1KU1KL1九U1xS1l-m-p.九-1Cx11l.K2.Qeffdp1無(wú)徑向通風(fēng)道時(shí)lxd1=xe1x1m.t1p乜2.g丿eYSCK2.Fxdp1T1.2(d+0.5f)小idClxeff=xS1九S2九U2九L2xS2+xd1+xe1=九U2+九L2l.m.p.九2lQeff255式中：56轉(zhuǎn)子端部漏抗57轉(zhuǎn)子斜槽漏抗58轉(zhuǎn)子漏抗59總漏抗60定子相電阻61定子相電阻標(biāo)么值62有效材料式中：式中：63轉(zhuǎn)子電阻導(dǎo)條電阻端環(huán)電阻式中：xd2=Xe2xSK=0.75

7、7Drleff=0.5CpX(bSKIx、t1d22x2=xS2+Xd2+Xe2+XSKR1a-S-N-100111r1=R1U1GCuGFe=C-lz-Z1-Q-S1-N1-Y-10-5=K-1-(D+5-7.8-10-31KFeRRFe=K=KK41_dpi104轉(zhuǎn)子導(dǎo)條面積端環(huán)截面積轉(zhuǎn)子導(dǎo)條或端環(huán)的電阻系數(shù)導(dǎo)條電阻標(biāo)么值端環(huán)電阻標(biāo)么值轉(zhuǎn)子電阻標(biāo)么值64滿載電流有功部分65滿載電抗電流部分式中：66滿載電流無(wú)功部分67滿載電勢(shì)68空載電勢(shì)69空載定子齒磁密70空載轉(zhuǎn)子齒磁密71空載定子軛磁密72空載轉(zhuǎn)子軛磁密73空載氣隙磁密SBSRr二RkwBBU1r二RkwRRU1r2=rB+rRi=K

8、-x()+Q-X-i)IsmPmP1eL二1-VPr1+iRX1=1-iX1T101-T1T20C10C20g01-1-1-1-T2C11-1-1-1-C274空載定子齒安匝75空載轉(zhuǎn)子齒安匝76空載定子軛安匝77空載轉(zhuǎn)子軛安匝78空載空氣隙安匝79空載總安匝80空載磁化電流81定子電流標(biāo)么值定子電流實(shí)際值82定子電流密度83線負(fù)荷84轉(zhuǎn)子電流標(biāo)么值轉(zhuǎn)子電流實(shí)際值端環(huán)電流實(shí)際值85轉(zhuǎn)子電流密度導(dǎo)條密度端環(huán)密度86定子鋁損耗87.轉(zhuǎn)子鋁損耗AT=at-hT10T10T1AT=atf-hT20T20T2AT=C-atf-1C101C10C1AT=C-atf1C202C20C2AT=g00.8g-B

9、eg0AT0=ATT10+ATT20+ATC10+ATC20+ATg02.22AT-p二0m0m-ZK1血dpii1iP2+iR2I1=i1-Ikwi2八ip2+ix222KWZ卩KJQ2Al1P=p-P-103Al1Al12Al2P=pP103Al2Al222i221588附加損耗89機(jī)械損耗機(jī)械損耗標(biāo)么值90定子鐵耗1)定子齒體積2)定子軛體積3)損耗系數(shù)4)定子齒損耗5)定子軛損耗6)總鐵耗鐵耗校正系數(shù)鐵耗標(biāo)么值91總損耗標(biāo)么值92輸入功率93總損耗比94效率95功率因數(shù)96轉(zhuǎn)差率97轉(zhuǎn)速PPS二S參考實(shí)測(cè)值取SP-1032PfwPfwPP-103210丿V =pShT1T1T1V =2

10、pShC1C1C1pT1PT1PC1PFe參考實(shí)測(cè)值取pC1=PHVT1=pC1=k1k1=2.5PFe-VC1-PT1+k2-PC1k=22PFeP-1032工P=PA1+PAl2+PFe+PS+PfwP1=1+工PP1(A12)+P-P+P4P+PSn=1+PAl2FeT1C1Sfw120f(1-S)n=n-p2098最大轉(zhuǎn)矩1-ST_、2r1+吋r12+x2k丿99.起動(dòng)電流假定值I=(2.53.5)TIstMKW100.起動(dòng)時(shí)漏磁路飽和引起漏抗變化的系數(shù)AT(、BL1.6g-pC對(duì)應(yīng)KzAT、-IZ1-0.707K+(KK-J1-(st)staU1d1p1Q勺01L%p-0.64+2.

11、5丨gC屮+1112101. 齒頂漏磁飽和引起定子齒頂寬度的減少102. 齒頂漏磁飽和引起轉(zhuǎn)子齒頂寬度的減少103. 起動(dòng)時(shí)定子槽單位漏磁導(dǎo)式中：C-(-b)(-K)51 101ZC-C-b)(-K)52 202Z九()-K(X-AX)+K九S1(st)U1U1U1L1L1AXU1104.起動(dòng)時(shí)定子槽漏抗-X()-x(、-xS1(st丿XS1S1105.起動(dòng)時(shí)定子諧波漏抗xd1(st)-KZxd1106.定子起動(dòng)漏抗x()x()+x()+x1(st)S1(st)d1(st)e1107.考慮到擠流效應(yīng)的轉(zhuǎn)子導(dǎo)條相對(duì)高度丨bfg0.1987h|BfMibp1RB式中：hBhBbB-bRbBbRpBpB轉(zhuǎn)子擠流效應(yīng)系數(shù)起動(dòng)時(shí)轉(zhuǎn)子槽單位漏磁起動(dòng)時(shí)轉(zhuǎn)子槽漏抗起動(dòng)時(shí)轉(zhuǎn)子諧波漏抗起動(dòng)時(shí)轉(zhuǎn)子斜槽漏抗轉(zhuǎn)子起動(dòng)漏抗起動(dòng)總漏抗轉(zhuǎn)子起動(dòng)電阻起動(dòng)總電阻起動(dòng)總阻抗起動(dòng)電流起動(dòng)轉(zhuǎn)矩S2(st)AXU2U2(st)L2(st)九(、=九AXU2(st)U2U2=0.43224L2(st)L2XS2(st)=S2(st)S2Xd2(st