By Lionel Warnes (auth.)
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However, nearly all electricity is generated and consumed in the form of AC. In order to continue to use the methods devised originally for DC circuits, Heaviside 1 developed the use of complex numbers for currents, voltages and impedances. This has proved to be the most powerful tool ever put into the hands of electrical engineers. 1 Sinusoidal excitation Conventional, rotating generators naturally produce sinusoidal voltage waveforms so that the most important circuits in practice are those which are sinusoidally excited (sometimes called 'AC circuits').
1. 1 Mesh analysis Mesh analysis applies KVL systematically to a circuit and produces simultaneous equations which may be solved to give the mesh currents. A mesh is a loop in a circuit with no loops inside it. 39, which represents a domestic 2-phase Chapter 1 31 supply common in North America. It contains three meshes: ABCDA, ADEFA and CEDC; the large loop ABCDEFA is not a mesh as it can be divided into smaller loops. The meshes have been numbered 1, 2 and 3. , while mesh three represents a two-phase circuit for supplying relatively large loads such as a cooker or a heater.
It contains three meshes: ABCDA, ADEFA and CEDC; the large loop ABCDEFA is not a mesh as it can be divided into smaller loops. The meshes have been numbered 1, 2 and 3. , while mesh three represents a two-phase circuit for supplying relatively large loads such as a cooker or a heater. Q resistances represent the wiring resistance. 39 Mesh analysis. The circuit represents a domestic 2-phase supply in North America. The 160 load is connected to both phases, so the voltage across it is almost doubled.