Question

有一正弦交流电压,表达式为u=311sin(314t–四分之拍)V求该交流电压的角频率,频率,有效值,最大值和初相位,

Answer 1

ω = 314 rad/s

f = ω / 2π = 50 Hz

U = Um / √2 = 311 / √2 = 220 V

Um = 311 V

φ = - 45°