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Note for Network Theory - NT by Suman Kumar Acharya

  • Network Theory - NT
  • Note
  • Biju Patnaik University of Technology Rourkela Odisha - BPUT
  • Electrical and Electronics Engineering
  • B.Tech
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EE 221 Circuits II Chapter 13 Magnetically Coupled Circuits 1

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Magnetically Coupled Circuits 13.1 What is a transformer? 13.2 Mutual Inductance 13.3 Energy in a Coupled Circuit 13.4 Linear Transformers 13.5 Ideal Transformers 13.6 Applications 2

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13.1 What is a transformer? It is an electrical device designed on the basis of the concept of magnetic coupling.  It uses magnetically coupled coils to transfer energy from one circuit to another.  It is the key circuit element for stepping up or stepping down ac voltages and currents, impedance matching, isolation, etc….  3

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13.2 Mutual Inductance   It is the ability of one inductor to induce a voltage across a neighboring inductor, Mutual inductance is measured in henrys (H). di v1  L1 1 dt di1 v2  M 21 dt di v2  L2 2 dt v1  M 12 4 di2 dt

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