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一台发电机产生的电动势的瞬时值表达式为:e = 311sin314tV.,则此发电机产生的电动势的最大值为_______V,有效值为_______V,产生的交流电的频率为______Hz.

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νA=311sin(wt-120°),νC=311sin(wt+120°)  νA=311sinwt,νC=311sin(wt+120°)  νA=311sin(wt+90°),νC=311sin(wt-90°)  νA=311sin(wt+90°),νC=311sin(wt-+20°)  
e=220sin(314t 十 300 )  e=2202 sin(314t+300 )  e=220sin(314t—300 )  e=2202 sin(314t—300 )  
υA=311sin(ωt-120°),υC=311sin(ωt+120°)  υA=311sinωt,υC=311sin(ωt+120°)  υA=311sin(ωt+90°),υC=311sin(ωt-90°)  υA=311sin(ωt+90°),υC=311sin(ωt+210°)  
e=220sin(314t+30°)  e=320sin(314t+30°)  e=220sin(314t-30°)  e=220  
vA=311sin(ωt-120°),vC=311sin( ωt+120°)  vA=311sinωt,vC=311sin( ωt+120°)  vA=311sin(ωt+90°),v C=311sin(ωt-90°)  vA=311sin(ωt+90°),v C=311sin(ωt+210°)  
e =220sin(314 t+30°)  e =220sin(314t- 0°)  e =-220sin(314 t+30 °)  e =-220sin(314t-30 °)  
e=220sin(314t+30°)  e=220sin(314t-30°)  e=-220sin(314t+30°)  e=-220sin(314t-30°)  

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