2×3 R 0692 3+5+2 2×1.6 R=4+1.5+ =55+089=6.39g 2+1.6 另解Y→Δ变换 49 R a 492 R1|159 49 0.69 1Q2 三:Iab一 39 59 29 R, 1 Q2 1 Q2 55×4.224 1Q2 1Q2 R,=4+ 6.39 ab 55+4.224 西南交通大学 带西南交通大学 = W + + ´ = 0.6 3 5 2 2 3 R3 = + = W + ´ = + + 5.5 0.89 6.39 2 1.6 2 1.6 4 1.5 Rab 另解Ｙ→Δ变换 Rab a b 11Ω 5.5Ω 1Ω 4Ω 5Ω R3 R1 3.67Ω R2 = W ´ + ´ + ´ = 11 1 1 2 2 3 3 1 R1 = W ´ + ´ + ´ = 3.67 3 1 2 2 3 3 1 R2 = W ´ + ´ + ´ = 5.5 2 1 2 2 3 3 1 R3 = W + ´ = + 6.39 5.5 4.224 5.5 4.224 4 Rab Rab b a 4Ω 1.5Ω 0.6Ω 1Ω 1Ω 1Ω R1 R3 R2 Rab a b 5Ω 4Ω 3Ω 2Ω 1Ω 1Ω