Methods of Circuit Analysis Universiti Malaysia Perlis：电路分析方法玻璃市马来西亚大学.ppt

DC CIRCUITS: CHAPTER 3 Methods of Circuit Analysis and Circuit Theorems: Nodal Analysis (Node-Voltage Method) Mesh Analysis (Mesh-Current Method) Superposition Theorem Source Transformation Thevenin’s Theorem Norton’s Theorem Maximum Power Transfer Introduction Direct methods are not suitable to solve complex and large circuits or as we demand many unknowns. To aid the analysis of complex circuit structures-need to develop more powerful techniques from the basic laws by systematic approaches: Nodal Analysis and Mesh Analysis. These two techniques can be used to solve almost any kind of circuit analysis problems by means of a set of simultaneous equations. Introduction (Continued…) Four ways of solving simultaneous equations: Cramer’s rule Calculator (real numbers only) Normal substitution and elimination (not more than two equations) Computer program packages: matcad, maple, mathematica etc. Introduction (Continued…) Circuit analysis problems in this course will be limited to three linear simultaneous equations for conventional hand solutions. Circuit theorems merely developed to simplify circuit analysis applicable to linear circuits such as Thevenin’s and Norton’s theorems, superposition theorem, source transformation and maximum power transfer. Introduction (Continued…) Circuit theorems are not analysis techniques, rather they add up to the list of simplifying/reduction techniques such as the series-parallel reductions and ?-Y transformations. Although many computer aids facilitate us as effective mathematics tools to solve engineering problems they cannot replace the compulsory needs to study the circuit theories govern circuit behavior in performing both circuit analysis and design. Circuit Analysis Method NODAL ANALYSIS Concept Developed based on the systematic approach of Kirchhoff’s current law (KCL) to find all circuit variables without having to sacrifice any of the elements. General procedure which is making use of node voltages in circuit anal