380v的1kw电机额定电流是多少?

2024-12-10 20:24:16
推荐回答(5个)
回答1:

1KW的三相电机额定电流是1.9安。

三相电机额定电流计算公式:

I=P/1.732/U/cosφ/η

扩展资料:

计算方法及特殊情况的应用

额定电流一般由下式计算得出:

额定电流=额定功率/额定电压(I=P/U)

额定电流I=

三相电动机的额定电流指的是电机电源引入线的线电流,对于星型接法的电动机,线电流就等于相电流,对于三角形接法的电动机,线电流等于根号3倍的相电流。

因此,额定电流计算公式:

P--电动机额定功率;

U--电动机线电压;

μ--电动机满载时效率;

cosφ---电动机满载时功率因数。

参考资料来源:百度百科-额定电流

回答2:

p=√3×v×a×cosφ
电流=功率/(√3×电压×cosφ)
三相电机电流=功率/1.732/电压/功率因数(额定电流取0.8)
三相电机电流=1000/1.732/380/0.8=1.9安培

三相电动机的额定电流指的是电机电源引入线的线电流,对于星型接法的电动机,线电流就等于相电流,对于三角形接法的电动机,线电流等于根号3倍的相电流。额定电流计算公式:Ie=P/(√3U*η*COSφ) P--电动机额定功率 U--电动机线电压 η--电动机满载时效率 COSφ---电动机满载时功率因数目前国产电动机无5kW这个规格,与之最接近的是5.5kW,以Y系列5.5kW 2极电机为例,η=85.5%,COSφ=0.88 则该电动机的额定电流为: Ie=5.5*1000/(√3*380*0.855*0.88)=11.1(A)

回答3:

电机功率P=√3UIcosφ 电压U=380伏, cosφ 为功率因数,小型电机一般可取0.80计算。
I=P/(√3Ucosφ)=1000/(√3x380x0.80)=1.9安。
1KW的三相电机额定电流是1.9安。

回答4:

P=1.732UIcosΦ
三相电机电流=功率/1.732/电压/功率因数(额定电流取0.8)
三相电机电流=1000/1.732/380/0.8=1.9安培

回答5:

电流=功率÷电压=1000瓦÷380伏=2.6安

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