分層教學(xué)1-按部就班學(xué)畫圖教材

三相異步電動(dòng)機(jī)

鏈?zhǔn)嚼@組展開圖的繪制

極距τ=Z/2P=24/4=6(槽)Step1：計(jì)算相帶寬度q=τ/m=6/3=2(槽)電角度θ=p*360o=2*360o=720o槽距度α=θ/Z=720o/24=30o三相繞組首端相差槽數(shù)n=120/α

=120/30o=4（槽）已知2P=4，m=3，Z=24，可知Step2：標(biāo)槽號(hào)121314151617181920212223241234567891011N1S1S2N2Step3：劃極距121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step3：分相帶121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step4：標(biāo)示參考電流121314151617181920212223241234567891011相鄰相帶參考電流方向相反N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step5：標(biāo)示參考電流121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step6：確定線圈節(jié)距大小121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step7：放置U相繞組各個(gè)極相組121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step8：放置V相繞組各個(gè)極相組121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step9：放置W相繞組各個(gè)極相組121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step10：連接U相繞組的極相組U1121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step10：完成U相繞組端部接線U1U2121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1U1U2Step11：確定V相繞組首端位置V1間隔4槽121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1Step12：完成V相繞組端部接線V1V2U1U2121314151617181920212223241234567891011121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1U1U2V1V2Step13：同理，完成W相繞組端部接線W1W2間隔4槽121314151617181920212223241234567891011N1S1S2N2U1V1W2U2V2W1U1V1W2U2V2W1U1U2V1V24極24槽單層鏈?zhǔn)嚼@組展開圖W1W2層次一手指口述內(nèi)容：計(jì)算標(biāo)槽號(hào)劃極距分相帶標(biāo)示參考電流確定線圈節(jié)距大小放置U相繞組各個(gè)極相組層次一手指口述內(nèi)容：放置V相繞組各個(gè)極相組放置W相繞組各個(gè)極相組完成U相繞組端部接線確定V相繞組首端位置完成V相繞組端部接線同理，完成W相繞組端部接線課后作業(yè)某三相異步電動(dòng)機(jī)，采用單層鏈?zhǔn)嚼@組。Z=36，2p=6。繪出其定子繞組展開圖。

要求：

展開圖信息完整。確定線圈的節(jié)距y由于每極每相槽數(shù)q=τ/m=6/3=2(槽)所以該電機(jī)定子繞組采用鏈?zhǔn)嚼@組如圖，線圈兩個(gè)有效邊中的電流方向相反，所以在放置時(shí)兩個(gè)有效邊應(yīng)處于同一相的不同的相帶下方。U1U2W2V1y=8-1=7確定線圈的節(jié)距yy=8-2=6確定線圈的節(jié)距yy=13-8=5確定線圈的節(jié)距yy=14-8=6確定線圈的節(jié)距yy=