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Understanding Self-Excited and Compound Generators in Electric Machines

Chapter 12 of "Electric Machines" by Hubert delves into self-excited and compound generators. It covers critical concepts such as the load distribution, changes in output voltage, and the relationship between flux and current. A focus is placed on the self-excited shunt generator and identifying connection errors in diagrams. Additionally, it examines the effects of adding series inductors and resistors on current flow and the importance of protection circuits to prevent current reversal. This chapter provides essential insights for understanding electric machine design.

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Understanding Self-Excited and Compound Generators in Electric Machines

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  1. Elec467 Power Machines & Transformers Electric Machines by Hubert, Chapter 12 Topic: Self-excited and compound generators, load distribution.

  2. Self-excited shunt generator

  3. Changing the output voltage

  4. Flux and current relationship There is a incorrect connection in one of the above drawings. Which one is it? Examine the circuits using the right-hand rule for current flow.

  5. Short on the output

  6. Compensating windings Compensating winding are the stator coils wired to a separate DC source.

  7. Magnetization curve

  8. Adding a series inductor to a self-excited generator

  9. Motor design considerations

  10. Effect of adding a resistor to the series inductor of a self-excited generator • Adding a series inductor will increase the current flow. • Adding a resistor across the series inductor will change the rate at which the generator increase the current.

  11. Protection circuit prevents current reversal

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