电机设计计算实例(三相感应电机) (一)额定数据及主要尺寸 1.输出功率2P 2P =15kw 2P =15kw 2.外施相电压1U 1U =380V 1U =380V 3.功电流KWI 1132 10UmPIKW=380310153=13.1579A KWI=13.1579A 4.效率 =0.89 =.89 5.功率因数cos cos=0.81 cos=0.81 6.极数 p p =6 p =6 7.定子槽数1Q 1Q =54 1Q =54 转子槽数2Q 2Q =44 2Q =44 8.定子每极槽数 pQQP11 = 654=9 1PQ=9 转子每极槽数 pQQP22 =322644 2PQ= 322 9.定转子冲片尺寸见图 10.极距P pDiP1 =620514159.3=107.3377 P =107.3377mm 11.定子齿距1t 111QDti =5420514159.3=11.92641 1t =11.92641mm 12.转子齿距2t 222QDt =441.20414159.3=14.5727 2t =14.5727mm 13.节距 y y =8 y =8 14.转子斜槽宽SKb SKb=11.92641 SKb11.92641mm 15.每槽导体数1Z 1Z =34 1Z =34 16.每相串联导体数1Z 11111amZQZ=233454=306 1Z=306 1 式中: 1a =2 17.绕组线规(估算) 8.107.5208189.01579.13cos111111KWIIaISN 式中:导线并绕根数·截面积11SN 查表 取11SN=11.5 11SN =1 1.5 定子电流初步估算值 cosIIKW1=08189.01579.13=18.252A 1I =18.252A 定子电流密度1 1 =5.07 1 =5.07 18.槽满率 (1)槽面积 22221RhhbRSSSS= 28.314159.325.1825.58.322 =130.7573mm2 SS =130.7573mm2 (2)槽绝缘占面积 7133.21)5.58.3)214159.3(25.18(35.0221SSiibRRhCS iS =21.7133mm (3)槽有效面积 iSeSSS=130.7573-21.7133=109.044 mm2 eS =109.044 mm2 (4)槽满率 7784.0044.10958.13412211efSdZNS fS =0.7784 绝缘厚度iC iC =0.35mm iC =0.35mm 导体绝缘后外径d d =1.58mm d =1.58mm 槽契厚度h h =2mm h =2mm 19.铁心长l 铁心有效长 无径向通风道 glleff2=200+20.45=200.9mm effl=200.9mm 净铁心长 无径向通风道 lKlFeFe=0.92200=184mm Fel=184mm 铁心压装系数Fel FeK=0.92 FeK=0.92 20.绕组系数 111pddpKKK=0.9560.9848=0.945 1dpK=0....