西门子6SL3353-3AG41-7CA0

6SL3353-3AG41-7CA0

额定功率是电动机重要的技术参数之一，对于选型、安装和使用电动机都有着至关重要的影响。一般来说，根据负载的性质和工作环境的不同，需要选择不同额定功率的电动机，以保证电机的正常工作和寿命。同时，电动机在使用中也应该严格按照额定功率的要求使用，避免过载和过热等问题的发生，确保电机的和可靠运行。

　　三相异步电动机额定功率怎么求

　　三相异步电机功率公式：P=1.732UIcosφ

　　其中：

　　P—三相平衡功率

　　1.732—根号3

　　U—线电压，一般是380伏，变压器出来的电压常常是400伏左右

　　I—线电流

　　cosφ—，是0到1之间的数值，电阻性负载为1，一般为0.75到0.85，日光灯为0.5

　　在实用中求出电流后一般是用电线电缆允许长期载流量表选择导线截面积的大小。实用中没有用电阻的定义式推导线径，因为导线中的电流还有趋肤效应；另外R=ρl/s表示电阻的关系式。这里的R只是直流电流在导体中受到的阻碍作用。

　　三相异步电机功率计算公式推导

　　三相对称负载电路总功率等于3乘以每相的功率，即P=3*u*i，

　　其中：

　　u—是平均相电压

　　i—是平均相电流

　　Ｙ型联接时：U=√3u，I=i

　　P=3*1/√3 *U*I*cosφ=√3UIcosφ

　　Δ型联接时：U=u，I=√3i

　　P=3*U*1/√3* I*cosφ=√3UIcosφ

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