正弦式交变电流有效值如何推导?
正弦式交变电流有效值如何推导?
数学人气：152 ℃时间：2019-12-05 23:18:28
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由正弦式交变电流的对称性,即只需计算半周期的热效应.将正弦式交变电流的半周期分成n份(n→∞),每份Δt=T/(2n)I=f(t)=Im*sin(2π/T)* Δt则,I1=f(t1)=f(Δt)=Im*sin(π/n)I2=f(t2)=f(2Δt)=Im*sin(2π/n)……In=f(tn...
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