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电路分析，求N的诺顿等效电路

2025-04-08 01:52:30

推荐回答（1个）

回答1：

这题先求戴维宁等效电路后再转诺顿等效电路简单。
戴维宁电路的开路电压Uab=4.5*2+(12/18)*9=9+6=15V (由于RL开路，i=0，受控电压源短路除源求得）

在RL处加1A电流源，求Uab=（4.5+1)*2+[(12-9)/18]*6+9=11+1=12V ([(12-9)/18]是下面闭合回路的电流）
等效内阻Ro=Uab/1=12/1=12Ω
戴维宁等效电路为；Uo=15V,Ro=12Ω

再转诺顿等效电路；Is=15/12=1.25A，并联的Ro=12Ω。

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