上海交大電機學(xué)實驗+三相異步電動機參數(shù)及工作特性

上海交大電機學(xué)實驗+三相異步電動機參數(shù)及工作特性2實驗三三相異步電動機參數(shù)及工作特性1．掌握三相異步電動機空載、堵轉(zhuǎn)實驗及2．用實驗的方法測定三相異步電動機的工下圖3-1為三相異步電動機參數(shù)及工作特性3N1NNNL500V；4C4962.9222.8182.7322.716C4962.9222.8182.7322.7162.6030AB414.6849527.040560308402511500710092,9142.076BC419.9501920.28CA421.7767732.30?2472L0.17L0.18L0.19L0.20L0.20L0.20L0.28L0.50-456-306-283-253-227-212-93234567836流電流表10A；序U(V)號序U(V)號UUUUIUIIpP0P00AB418.3.914.11621390.3.303.53701384.3.173.46321379.3.093.38665373.3.003.30419368.2.923.21980289.2.072.25899191.1.461.614880ABC00ABABCA05UU(V)UUUIIIP(W)IPPcosφPkABBCCAk182.984.484.283.85589277.578.778.978.36109366.768.568.067.71246454.956.655.755.71024541.842.842.142.28629626.027.727.126.96227U=(U+U+U)/3；I0ABABCAkA186.4955424.5084432.192B446.4035004.4893872.214C6.9596.363534.33587.030=(I+I+I)/3；ABCk?k7.04550117667L0.6706.42472106578L0.6805.4634675421L0.6754.4423248280L0.6743.3713426160L0.6722.14551065L0.665為三相輸入0序號IABIICBI16.97.47.07.180124947PIPWPP1N623047596-264IIIIIppp。11ABC11．根據(jù)空載實驗數(shù)據(jù)繪出空載特性曲線0000000p3UI00700008002．根據(jù)空載實驗數(shù)據(jù)繪出堵轉(zhuǎn)特性曲線kkkkkkk3UIkk9kkkkkk3．根據(jù)堵轉(zhuǎn)實驗數(shù)據(jù)計算三相異步電動機的kkkkNkp=667W，利用式子：kZ=????kR=??k3?2?Xk=√Z=83.89=11.916Ω7.047.04R=667=4.486ΩkkXk=√11.9162?4.486.039Ω??75℃=√?=R235+75?75℃k235+???75℃=5.54Ω??75℃=12.351Ω4．根據(jù)空載實驗數(shù)據(jù)計算三相異步電動機的mmm為了求勵磁參數(shù)，應(yīng)分離鐵損耗p和機械損Fe耗p。如下圖3-8所示，利用圖中的數(shù)據(jù)，可mec0011kZ0=UooIoR=pFeom3I2oX=Xm0Zm=(Xm2+Rm20000mec0N時，可近似計算I=3.071A；p=384-149.290FeZ=379.6=123.6Ω3.07103.071R=234.71=8.296ΩX=123.6–5.52=118.08ΩmZ=√118.082+8.2962=118.371Ωm5．根據(jù)負載實驗所測數(shù)據(jù)計算三相異步電動P=0.105nT22V3U1I1P2×100%P1入1)7945861)7791922)8485