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简答题对称三相电压,已知A相瞬时值表达为U=3Sin(314t+30°)V试写出其它各相电压瞬时值表达式。
  • 已知V(A)=3Sin(314t+30°)V根据B相电压滞后A相电压120°,C相电压超前A相电压120°,
    则:B相电压瞬时值表达式为V(B)=3Sin(314t+30°-120°)=3Sin(314t-90°)VC相电压瞬时值表达式为V(C)=3Sin(314t+30°+120°)=3Sin(314t+150°)V
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