第二节电阻星形与三角形连接的等效变换星形(Y)连接与三角形()连接用于不对称参数的电路变换连接RRRR1R2R3Y连接YR1=R+R+RRRR2=R+R+RRRR3=R+R+RRRYR=R1R2+R2R3+R3R1R3R=R1R2+R2R3+R3R1R1R=R1R2+R2R3+R3R1R2RRRR/3R/3R/3RRR3R3R3R例:已知电路各参数,求电流I。33311+–2VI11111+–2VII=1A例2-3求ab间电阻。ab1113333ab3333315.135.13abR