電機(jī)設(shè)計計算常用公式

1、電機(jī)設(shè)計計算常用公式1.輸出功率P2P22.外施相電壓U1U13 .功電流IKWI =KW m - U4.效率門門，5.功率因數(shù)cos中cos 中6.極數(shù)pp7 .定子槽數(shù)eiQ1轉(zhuǎn)子槽數(shù)Q2Q28.定子每極槽數(shù)Q =Q pip轉(zhuǎn)子每極槽數(shù)Q =Q f 2 p9.定轉(zhuǎn)子沖片尺寸見圖10 .極距TP兀-Dpp 111定子齒距t1兀-DQ 11 112 .轉(zhuǎn)子齒距t2丸-D t = 2-2 Q213.節(jié)距JJ14 .轉(zhuǎn)于斜槽寬BSKBSK15 .每槽導(dǎo)體數(shù)Z1Z116 .每相串聯(lián)導(dǎo)體數(shù)ZZ = XS m - a式中：a =117.繞組線規(guī)(估算)式中：導(dǎo)線并繞根數(shù)截面積N S 11定子電流初步估算

2、值定子電流密度A1槽滿率槽面積槽絕緣占面積槽有效面積槽滿率絕緣厚度Ci導(dǎo)體絕緣后外徑d槽契厚度h鐵心長l鐵心有效長凈鐵心長鐵心壓裝系數(shù)KFe繞組系數(shù)(1)分布系數(shù)式中： I S =I1 氣 1一一 查表取% siKW丑 cos甲I = KW1 cos。A1S. = C(2hs、兀 R + 2 R + b；Se = S. -SCidh無徑向通風(fēng)道l f = l + 2 g無徑向通風(fēng)道If = Kf lFeK廣 K1 %sinK = d 11以 sin 2q1（2）短距系數(shù)式中:21.每相有效串聯(lián)導(dǎo)體數(shù)（二）磁路計算22.每極磁通式中:23.齒部截面積（1）定子（2）轉(zhuǎn)子24.軸部截面積（1）定子

3、式中:定子軸部磁路計算高度圓底槽:（2）轉(zhuǎn)子轉(zhuǎn)子軸部磁路計算高度hC2平底槽25.空氣隙面積26.波幅系數(shù)27.定子齒磁密DTI a = -tQ1Kpi=sinV -90oyTplZ K =Z K（|）1 dpi （|）1 dpiE 408（b 12.22/ - Z K（f）i dpisT1sT2scihClSC2hC2=b -IT1二 bT2=hCl/Fe=hC2BT1FeDeff最大。平均。4=F -s STl轉(zhuǎn)子齒磁密定子軛磁密轉(zhuǎn)子軛磁密空氣隙磁密32 .查附錄VI得齒部磁路計算長度定子圓底槽轉(zhuǎn)子平底槽軛部磁路計算長度定子轉(zhuǎn)子有效氣隙長度式中：定、轉(zhuǎn)子卡氏系數(shù)KC1、K 2半閉口槽和半開

4、口槽式中：齒距t4=Fs ST2C1槽口寬boC1C2at at at atT1 T 2C1C 2hT1F +hs2+3 Rh = h + hT 2R1R 2，lC1-h C1 JK =t(4.4g + 0.75b )C1 _ t(4.4g + 0.75b 工 b 2K =t(4.4g + 0.75b )c2 t(4.4g + 0.75b 工 b 2齒部所需安匝定子轉(zhuǎn)子軛部所需安匝定子軛部磁路長度校正系數(shù)C1轉(zhuǎn)子ATT1ATT2ATC1ATC2_ atT1 hT1_ atT2 * hT2=C1 - atC1 - lC1=C2 -a%2C2C 2AT = 0.8B gAT + AT + AT廣g

5、AT = ATt 1 + ATt 2 + ATC1 + ATC 2 + AT,2.22AT - pI m m1 - Z1 Kp 1i -Jm- m IKW-1x m im校正系數(shù)C2空氣隙所需安匝飽和系數(shù)總安匝滿載磁化電流42 .滿載磁化電流標(biāo)么值激磁電抗（三）參數(shù)計算線圈平均半匝長（估算）雙層線圈式中：七Lb + 2C匕（直線部分長）=l + 2七C T rs 2cos 以兀 D + 2（h + h ）+ h + R 廣Pd1式中：cosa = 1 sin2 asin a =bsi + 2Rbs i + 2 R + 2bT iXe1雙層線圈端部軸向投影 長47.漏抗系數(shù)48 .定子槽單位漏磁

6、導(dǎo)式中：定子槽漏抗式中：定子諧波漏抗式中：定子端部漏抗f = C - sin ad SC 2.63 f .烏./項切血K產(chǎn) xp . U 2 .1051人 =K 人 + K 人S1U1 U1L1L1KU1KL1力U1- l m p .人 c s 1l fKp 2 q x無徑向通風(fēng)道時l = l S CK 2 F xdp1T1.2(d. + 0.5L)C l x effxS1+ xd1 + xe1定子漏抗53 .轉(zhuǎn)子槽單位漏磁導(dǎo)式中：54.轉(zhuǎn)子槽漏抗*S 2=*U 2 +XL 255.式中：轉(zhuǎn)子端部漏抗57 .轉(zhuǎn)子斜槽漏抗轉(zhuǎn)子漏抗總漏抗定子相電阻定子相電阻標(biāo)么值有效材料式中：式中：轉(zhuǎn)子電阻導(dǎo)條電

7、阻端環(huán)電阻式中：Xd2Xe2X SK0.757 Dr=0.5X = XR1Xd2+ X2V S1 - N100r】=RI -W1 U1SKGCuGFe=K l (D +51K FeRrFe-N1E0 -5-7.8 10 -3DR PR頃.P2 SR jK = m41104轉(zhuǎn)子導(dǎo)條面積SB端環(huán)截面積SR轉(zhuǎn)子導(dǎo)條或端環(huán)的電阻系數(shù)p B p R導(dǎo)條電阻標(biāo)么值r = R -KW- BB U1端環(huán)電阻標(biāo)么值-Ir R = R -KW-1轉(zhuǎn)子電阻標(biāo)么值r 2 = r B + rR64.滿載電流有功部分ip=165.滿載電抗電流部分J,、1i = K .工.f)1+K x i)smPmP式中：K = 1 +

8、 im - X166.滿載電流無功部分LA + L67.滿載電勢1 n r -)1 -s = 1 - ip - r 1 + ir -X/68.空載電勢1 s = 1 i . %169.空載定子齒磁密B = !S0 BT101 ST1L70.空載轉(zhuǎn)子齒磁密B = - BT 201 ST 2L71.空載定子軛磁密B = BC101 SC1L72.空載轉(zhuǎn)子軛磁密B =BC 201 SC 2L73.空載氣隙磁密B =Bg01 S gL74.空載定子齒安匝一，叫 10 =叫 10 - hT 175.空載轉(zhuǎn)子齒安匝一，ATT20 = atT20 - hT276.空載定子軛安匝.- 一ATC10 = C1

9、- atC10C177.空載轉(zhuǎn)子軛安匝ATC20 = C2 - atC20C278.空載空氣隙安匝ATg0 = 0.8ge -Bg079.空載總安匝AT0 = ATt10 + ATt20 + ATC10 + ATc20 + ATg080.空載磁化電流I = 2.22A, p m 0m Z K81.定子電流標(biāo)么值-i_-，1 =匕 2+ iR 2定子電流實(shí)際值【Z82.定子電流密度A=-1 aN1 S183.線負(fù)荷A = mZ1兀 Di184 .轉(zhuǎn)子電流標(biāo)么值i2 =1,ip2 + ix2轉(zhuǎn)子電流實(shí)際值i =廠 i m1 z(p1 . Kdp122 KWQV2端環(huán)電流實(shí)際值I = I -2-R

10、2 兀.p85.轉(zhuǎn)于電流密度導(dǎo)條密度A = i-B S B端環(huán)密度A IA = R-R SR86.定子鋁損耗PAZ1 = i 12 187.轉(zhuǎn)子鋁損耗匕=PA,】. P 103.Wi2 = i22 2P2 =恥2 P2 103附加損耗機(jī)械損耗機(jī)械損耗標(biāo)么值定子鐵耗定子齒體積定子軛體積損耗系數(shù)定子齒損耗定子軛損耗總鐵耗鐵耗校正系數(shù)鐵耗標(biāo)么值總損耗標(biāo)么值輸入功率總損耗比效率功率因數(shù)轉(zhuǎn)差率轉(zhuǎn)速PS = P參考實(shí)測值取S P - 1032PfwPfw參考實(shí)測值取PfwP - 1032VT1=p -ST1hT1VC1=2 pSC1hC1P T1pC1PT1=PT1 VT1PC1=PC1VC1PFe=k1

11、-PT1+ k2 PC1k=2.5k 2 =2P = PFeFeP 1032 P = PA1 +膈 + PFe+PS +Pfwp1=1+E p_ p p=P11 cos 甲=Zi 1 -nS=1+P +P -+P +P +PA2 Fe T1 C1 S fw_ 120 f (1 - Sn )P98 .最大轉(zhuǎn)矩T =1 SM(_：一f、2 r+Vr 12 + x2k)99.起動電流假定值I = (2.5 3.5)T -1 stM KW100.起動時漏磁路飽和引起 漏抗變化的系數(shù)BL 1.6 g - pC對應(yīng)KzAT、= I 巳-0.707 K +K * - K -g J1-(st)st a u 1

12、d1p1 q y0p = 0.64 + 2.5)1 + 2齒頂漏磁飽和引起定子 齒頂寬度的減少齒頂漏磁飽和引起轉(zhuǎn)子 齒頂寬度的減少起動時定子槽單位漏磁 導(dǎo)式中：CS1=(t - b01)1 -匕)CS2 =(t2 -b02)(-Kz)七 1(st ) = KU1(XU 1 -AXU1)+ KL1 氣AXU1104 .起動時定子槽漏抗- -XS1(st)% %1S1105.起動時定子諧波漏抗xd 1(st) = KZ ,與 1106.定子起動漏抗X1(st)=XS1G+ Xd1(st)+ Xe1107.考慮到擠流效應(yīng)的轉(zhuǎn)子導(dǎo)條相對高度&= 0.1987h i1 bB f Mib p1 RB式中：hBhBbB- bRbB bRpBpB108.轉(zhuǎn)子擠流效應(yīng)系數(shù)xx0109.起動時轉(zhuǎn)子槽單位漏磁導(dǎo)式中：+人L 2(st)AXU 2 (st)U2=0.43224-AXU2L 2 (st)起動時轉(zhuǎn)子槽漏抗起動時轉(zhuǎn)子諧波漏抗起動時轉(zhuǎn)子斜槽漏抗轉(zhuǎn)子起動漏抗起動總漏抗轉(zhuǎn)子起動電阻XS 2(st)=S2(st)* d 2 (st)x SK (st