1、爬地扇20寸電機一、額定數據:1、額定功率; PN =45W2、額定電壓; U1=240V3、極 數; P=44、相 數; m=25、頻 率; f=50HZ二、技術要求:1、效 率; n=22I2、功率因數; COSQ=0.9633、起動轉矩倍數; TSt =1.4、起動電流; Ist =0.3mA5、最大轉矩倍數; TM =6、絕緣等級; E三、沖片尺寸及鐵心數據:根據電機設計理論,主要尺寸D I1和 L 1與 P M 、轉速及所選擇的電磁負荷的關系6.1 KE 108P Na i KB K dpm n COSQ n 1 A BgP N D I1 L1 n 1 A Bgn 1 A Bg6.1

2、 KE 108a i KB K dpm n COSQC A-電機常數; DI1-電機定子內經; L1-電機定子長度; ai -計算極弧系數; (查表9-5 K dpm -繞組系數(查表9-2; n-效率; COSQ-功率因數 K E -壓降系數初值; n1-電機同步轉速; Bg A-電磁負荷; PN -額定功率 K B -波形系數P N =C A C A =P N =19.81.615001200.58單相異步電動機的電磁計算程序D I12 L 1=D I12 L 1=C A P N =10W0.6680.8041.0960.3251176470C A =8K B -1.096 B g -0.

3、58 A-120 DI1-4.45 L1-1.6Ai-0.668 KdPm -0.804 n-1500 COSQ-0.963 KE -0.9n-0.31、 定子外經 D1=7.57.52、 定子內經 DI1=4.453、 單邊氣隙 g=0.034、 轉子外經 D2=4.45-0.06=4.3955、 轉子內經 D2I =0.8Q 16Q 222L 1.6L 21.69、 定子齒距, t 1=3.14/16=0.873312510、轉子齒距 t2=3.14/4.39=0.62657定子 bo1=0.2 bs1=0.5 R=0.35 hso=0.08hs 1=0.07 hs2=0.46 hs=0.

4、11 h hS =0.63 h=0.15轉子 b02=0.1 r1=0.15 r2=0.08 hR0=0.01h R1=1.1 hR2=0.385 hR =0.7端環 b1=0.744 b2=0.533 d=0.36 DRe=4.27D ri =2.8711、定子齒寬 br1=3.144.45+2(0.08+0.07/16-0.5=0.4312、轉子齒寬 br1=3.144.39+2(0.01+0.15/22-20.15=0.6613、定子齒部磁路長度 hr =hS1+hS2+1/3R=0.07+0.46+1/3*0.35h r =0.64614、轉子齒部磁路計算長度 hr2=r1+hR2+r

5、2/3=0.15+0.385+0.026h r2=0.5616615、定子軛部磁路計算高度 hC1=D1-D I /2-hS -R/3=7.5-4.45/2-0.11-0.116=1.2983。=3.4932546、 定子轉子槽數 。=7、 定子轉子鐵心長 。=8、 極距 t=3.144.4516、轉子軛部磁路計算高度 hC2=D2-D I2/2-hR +r2/3+DI2h C2=0.898317、定子軛部磁路計算長度 LC1=(D1-h C1/6=3.24518、轉子軛部磁路計算長度 LC2=(D1-h C1/6=2.76719、定子槽有效面積槽面積: SS =2R+bS1/2(hS -h+

6、R/2=0.66槽絕緣面積 SI =CI (2hS +R=0.04槽有效面積 Se =SS -S I =0.6220、轉子槽面積 SB =(r1+r2h R2+1.57(r1+r2=0.9321、轉子斜槽寬 bSK =t1=0.8722、端環面積 SR =d(b1+b2/2=0.22986 端環內經 DRI =2.87端環外經 Dre =4.27端環平均直經 DR =DRC -b 1=3.5261+(DRI /DRO P 1-(DRI /DRO P1+(2.87/4.2741-(2.87/4.2741+0.21-0.2K R =0.6561.5=0.98423、氣隙系數;定子; KC1=t1(

7、4.4g+0.75bO1/ t1(4.4g+0.75bO1-Bo1K C1=0.87(4.40.03+0.750.2/0.87(4.40.03+0.750.2-0.04K C1=0.870.282/0.870.282-0.04K C1=0.24534/0.20534=1.19479轉子 KC2=1K C =K1 K 2=1.19479三、主繞組計算;1、繞組型式 正弦繞組(查附表9-2平均跨槽 ym =4/1=42、繞組系數; Kdpm =0.804端環系數 KR =P/2(1-DRI /DRO K R =4/2(1-2. 87/4.27 K R =2(1-0.6723、初選氣隙磁密 Bg =

8、125004、設磁路飽和系數;F rm =1.15計算極弧系數;a i =0.668波形系數;K B =1.0965、每極磁通初值; =a i B g tL 1 =0.6683.493251.412900 =42142.8476、總串聯導線數初值;K E *U 1*50*106K B *f*K dpm0.92205010000001.09642142.847500.8040.881184=198371367、每極串聯匝數;Z m =5331.8/6=888主相取;Z m =8908、定子主相電流初步估算值;P N 2U1COS 36222009、主繞組線規10、線圈中心直經; DC =Di1+

9、hS +hS0+hS1D C =4.45+1+0.08+0.07=5.6Z m =I 1=.=0.284導線截面初值; ( Sm =0.284選用線經( dm =0.23Z m =Z m =.=5331.8I 1=11、主繞組平均半匝長;L m =L1+(De rQ1ymL m =1.6+(3.145.61.6164L m =8.6336五、主相參數計算;1、主繞組電阻(75R 1m =(2.17Lm Zm 10-4SmR 1m =(2.178.6336168010-40.0415R 1m =3.14750.0415=752、轉子電阻(75導條電阻; RB =8.68(Zm Kdpm 1000

10、2(L 22+bSR 2(SB Q2 R B =8.68(10.80410002(2.56+0.7569(0.9322 R B =8.680.00000064640.0425R B =0.00000023852端環電阻;R R =8.68(Zm Kdpm 10002(0.637DR KR (P2SR R R =0.00000561075(0.6374.270.656(160.22986 R R 0.000013.67776=0.0000367776R 2m =RB +RR =0.0000367776+0.00000023852=0.00003701612 3、定子槽單位漏磁導;U1=(h0b01+(2hS1(b01+bS1U