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6ES7355-2CH00-0AE0
转子阻力不取决于滑移。但是,转子漏电抗确实等于并且等于Xr= 2πfrLr= s2πfLr,其中 Lr是转子绕组的漏感,仅由于连接转子绕组的磁通而产生。因此,转子在滑移处的感应电压可以用数学方式表示如下:
E2秒= sE2= IrRr+ j(2πfrLr)Ir
=IrRr+js2πfLrIr
= IrRr+ jsX2“我r(6)
哪里
E2秒= 转差 s 处的转子感应电压
E2= 静止时的转子感应电压 (s = 1.0)
我r= 转子相电流
Rr= 每相转子电阻
X2‘ = 2πfLr= 静止时每相转子漏电抗
将公式6的两面除以滑移s,并将转子量引用到定子侧,如在变压器中,得到
[E_{2}={Big(}frac{R_{r}}{s}+jX^{’}_{2}{Big)}I_{r}]
[{Bigg(}frac{N_{1}}{N_{2}}{Bigg)}E_{2}={Bigg(}frac{N_{1}}{N_{2}}{Bigg)}^{2}{Bigg(}frac{R_{r}}{s}+jX^{‘}_{2}{Bigg)}{Bigg(}frac{N_{2}}{N_{1}}{Bigg)}I_{r}]
[E_{1}={Bigg(}frac{R_{2}}{s}+jX_{2}{Bigg)}I_{2},,,(7)]
哪里
E1= (N1/N2) E2= 转子感应电压以定子为基准
我2= (N2/N1( hr= 转子电流以定子为基准
R2= (N1/ N2) R1= 转子电阻与定子有关
X2= (N1/ N2)2X2’ = 转子漏电抗,参考定子
公式4表示的定子电路和公式7表示的转子电路与施加电压的频率f相同。因此,这些定子和转子电路可以连接在一起,并与磁芯的模型组合成感应电动机的每相等效电路
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