회로이론
회로이론
역상전압
2004.3 기출
3상 전압 \(V_a,V_b,V_c\)의 역상전압 \(V_2\)는? (\(a=1\angle120°\))
- ① \(\tfrac13(V_a+V_b+V_c)\)
- ② \(\tfrac13(V_a+a^2V_b+aV_c)\) 정답
- ③ \(\tfrac13(V_a+aV_b+a^2V_c)\)
- ④ \(V_a-V_b\)
📖 해설
역상분
\[ V_2=\tfrac13(V_a+a^2V_b+aV_c) \]정상분은 \(\tfrac13(V_a+aV_b+a^2V_c)\), 영상분은 \(\tfrac13(V_a+V_b+V_c)\).
\[ V_2=\tfrac13(V_a+a^2V_b+aV_c) \]정상분은 \(\tfrac13(V_a+aV_b+a^2V_c)\), 영상분은 \(\tfrac13(V_a+V_b+V_c)\).