对称三相电源,假设U相电压UU=220sin(ωt+300)V,则V相电压为UV=220sin(ωt-120°)V。()
举一反三
- 已知在对称三相电压中,V相电压为uv=220sin(314t+π)V,则U相和W相电压为()V。 A: uu=2202 sin (314t-π3) uw=220 2 sin (314t+π3) B: Uu=2202 sin (314t+π3) uw=2202 sin (314t-π3) C: uu=2202 sin (314t+2π3) uw=2202 sin (314t-2π3)
- 对称三相电源,假设U相电压UU=2202sin(ωt+ 30V,则V相电压为UV=2202sin(ωt-120°)V。( )
- 已知在对称三相电压中,V相电压为uv=220sin(314t+π)V,则U相和W相电压为()V。
- 对称正序三相电压源星形联接,若相电压UA=220√3sin(wt-60°)V,则线电压UAB为( )V。 A: 220sin(wt-30°) B: 220√3sin(wt-60°) C: 220√3sin(wt-150°) D: 220sin(wt-150°)
- 已知电压U=220∠30°V,该电压的三角函数式为() A: u=220√2sin(ωt+30°)V B: u=220sin(ωt+30°)V C: u=220√2sin(ωt-30°)V D: u=220sin(ωt-30°)V