电路与电子技术课件（英文版）-第四章 交流电路分析.pptxVIP

MESH CURRENT ANALYSIS METHODMESH CURRENT ANALYSIS METHOD1. Define each mesh current consistently. Unknown mesh currents will be always defined in the clockwise direction; known mesh currents (i.e., when a current source is present) will always be defined in the direction of the current source.2. In a circuit with n meshes and m current sources, n ? m independent equations will result. The unknown mesh currents are the n ? m independent variables.3. Apply KVL to each mesh containing an unknown mesh current, expressing each voltage in terms of one or more mesh currents.4. Solve the linear system of n ? m unknowns. Mesh Current MethodIt is natural to also encounter circuits containing current sources, in practice.The following circuit illustrates how mesh analysis is applied to a circuit containing current sources. Mesh Current MethodThe following circuit illustrates how mesh analysis is applied to a circuit containing current sources. Mesh Analysis with Current SourcesMESH CURRENT ANALYSIS METHOD1. Define each mesh current consistently. Unknown mesh currents will be always defined in the clockwise direction; known mesh currents (i.e., when a current source is present) will always be defined in the direction of the current source.2. In a circuit with n meshes and m current sources, n ? m independent equations will result. The unknown mesh currents are the n ? m independent variables.3. Apply KVL to each mesh containing an unknown mesh current, expressing each voltage in terms of one or more mesh currents.4. Solve the linear system of n ? m unknowns. Mesh Current MethodSubsequent application of Kirchhoff’s voltage law (KVL) around each MESH provides the desired system of equations.In the mesh current method, a current flowing through a resistor in a specified direction defines the polarity of the voltage across the resistor Mesh Current Method : ExamplesWrite the mesh current equations for the circuit Mesh Current Method : ExamplesMESH CURRENT ANALYSIS M