数学式:U=Ua+Ub+Uc=Vsin(ωτ)+Vsin(ωτ+2π/3)+Vsin(ωτ+4π/3) =Vsin(ωτ)-Vsin(ωτ) =0 用向量计算最直观,但这里不好画图.
为什么三相电的UA+UB+UC=0?最好用数学推导出来,当然,语言表达出来也行.
数学式:U=Ua+Ub+Uc=Vsin(ωτ)+Vsin(ωτ+2π/3)+Vsin(ωτ+4π/3) =Vsin(ωτ)-Vsin(ωτ) =0 用向量计算最直观,但这里不好画图.