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【单选题】
1-2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 uw=220 sin (314t- ) uw=220 sin (314t- ) uw=220 sin (314t- )A.
Uu=220 sin (314t+ )
B.
Uu =220 sin (314t- ) uw=220 sin (314t+ )
C.
Uu =220 sin (314t+ )
D.
Uu =380 sin (314t+ )
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