电路与电子技术课件（英文版）-第二章电路的分析方法.pptxVIP

Resistive Network AnalysisTo illustrate the fundamental techniques for the analysis of resistive circuits.To define network variables and network analysis problemsTwo most widely applied methods are introduced _________ and ______________ Resistive Network AnalysisTo illustrate the fundamental techniques for the analysis of resistive circuits.To define network variables and network analysis problemsTwo most widely applied methods are introduced— node analysis and mesh analysis Resistive Network AnalysisOne method is based on principle of superposition, which is applicable only to linear circuits.Concept of Thévenin and Norton equivalent circuits is explored Network AnalysisThe analysis of an electrical network consists of determining each of the unknown branch currents and node voltages. To define all the relevant variables as clearly as possible, and in systematic fashion. Network AnalysisHow can we conduct “Network Analysis”? Network AnalysisHow can we conduct “Network Analysis”?Once the known and unknown variables have been identified, a set of equations relating these variables is constructed, and These equations are solved by means of suitable techniques. Network AnalysisHow can we conduct “Network Analysis”?The analysis of electric circuits consists of writing the smallest set of equations sufficient to solve for all the unknown variables. Network Analysis -ExamplesPlease identify the branch and node voltages and the loop and mesh currents in the circuit Network Analysis -ExamplesPlease identify the branch and node voltages and the loop and mesh currents in the circuit Network Analysis -ExamplesCurrents ia, ib, and ic are loop currents, but only ia and ib are mesh currents Electrical Network - LoopA loop is any closed connection of branches How many loops? Electrical Network - MeshA mesh is a loop that does not contain other loops. Meshes are an important aid to certain analysis methods.A loop is any closed connection of branches Network Analysis -Examples