三相交流电压的数学式:

V1 = Asin(2πft)=Asin(wt)

V2 = Asin(2πft - 2π/3)=Asin(wt-2π/3)

V3 = Asin(2πft + 2π/3)=Asin(wt+2π/3)

其中A是电压的峰值,f则是交流电压的频率。