[电路分析基础上册期末复习.ppt

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[电路分析基础上册期末复习

受控源是一种双口元件,又称为非独立源。一般来说,一条支路的电压或电流受本支路以外的其它因素控制时统称为受控源。受控源由两条支路组成,其第一条支路是控制支路,呈开路或短路状态;第二条支路是受控支路,它是一个电压源或电流源,其电压或电流的量值受第一条支路电压或电流的控制。 1、应用戴维南定理求解图胺示电路中的电流I。 2 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * 总复习 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 一、集总参数电路(电能的传送是瞬间完成的) 表征那种满足集总化条件的实际电路的模型。若一实际电路的尺寸非常小,较之表征其内电磁过程的物理量[如电流i(t)的和电压v(t)]的波长来说,可以忽略不计,看成集中在空间的一点,则称该实际电路满足集中化条件。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二、电流、电压参考方向 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 下面讨论图示二端元件和二端网络的功率。 三、电功率(能量的转换) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例 l-3 电路如图所示。已知uab=6V, uS1(t)=4V, uS2(t)=10V, R1=2?和R2=8?。 求电流i和各电压源发出的功率。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 两个电压源的吸收功率分别为 解: Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty

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