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Understanding Electromagnetic Induction and Electric Power Transmission Principles

Explore the foundational concepts of electromagnetic induction and electricity generation in this comprehensive overview. Learn about the revolutionary discoveries of Joseph Henry, Michael Faraday, and James Maxwell, and how their work shaped our understanding of magnetism and electric power. Gain insights into the functioning of generators and transformers, and their critical roles in converting mechanical energy into electrical energy. This guide also covers various power generation methods, including coal, nuclear, hydroelectric, and renewable sources, highlighting the complexities of power transmission.

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Understanding Electromagnetic Induction and Electric Power Transmission Principles

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  1. Electromagnetic Inductionand Electric Power Transmission 4/7/14 Joseph Henry, Michael Faraday and James Maxwell

  2. Bellwork • Why is motion a key word for magnetism? • Because moving electrons are the source of magnetism.

  3. Electricity and Magnetism • Electrical currents produce magnetic fields • Electricity and magnetism are intertwined with each other

  4. Electromagnetic Induction • Electromagnetic Induction: The process of creating a voltage in a circuit by changing the magnetic field.

  5. Electric Generator • Generator: A device that converts mechanical energy into electrical energy.

  6. Strong magnet or magnetic field Coil of wire that is part of a circuit A way to move the coil of wire Generator Components

  7. Transformers

  8. (transformer) Transformer

  9. Transformers • Transformer: A device for increasing or decreasing voltage through electromagnetic induction

  10. Transformer Components • Consist of two different coils of wire around opposite sides of an iron core. • Alternating current through a coil of wire induces a changing magnetic field in the core. • This field will cause a current flow in a secondary coil.

  11. Step-up: Voltage increases Current decreases Power stays the same Step-down: Voltage decreases Current increases Power stays the same Transformers P = I · V

  12. Mechanical Generators • Coal power plants (steam) • Nuclear power plants (steam) • Geothermal power (steam) • Methane power plants (steam) • Hydroelectric power plants (PEgrav) • Wind turbines (KEwind) • Tidal power (KEtide)

  13. Solar Power (non-mechanical) • Electromagnetic energy (Sun) converted into electric power

  14. Notes End Here!

  15. Power Transmission

  16. Steam-Powered Generator • Steam drives the turbine, which turns the coil wire in a magnetic field.

  17. Coal Power Plant

  18. Nuclear Power Plant

  19. Geothermal Generator

  20. Methane Power Plants

  21. Hydroelectric Power Plant

  22. Wind and Tidal Generators

  23. Tidal Power

  24. Mechanical Generators • Coal power plants (steam) • Nuclear power plants (steam) • Geothermal power (steam) • Methane power plants (steam) • Hydroelectric power plants (PEgrav) • Wind turbines (KEwind) • Tidal power (KEtide)

  25. Solar Power (non-mechanical) • Electromagnetic energy (Sun) converted into electric power

  26. U.S. Electric Power Sources 2012

  27. Power Transmission

  28. Power Plant • 6000-12,000 V (Springerville, AZ)

  29. Increase voltage to 120,000 – 240,000 V Step-up Transformer

  30. Power Lines • 120,000 – 240,000 V

  31. Step-down Transformer (Substation) • Decreases voltage to 2000 – 8000 V

  32. Step-down Transformer (Telephone pole) • Decrease voltage to 120 – 240 V

  33. Maxwell’s Equations

  34. Maxwell’s Equations

  35. The End

  36. Notes for Title Slide • Joseph Henry – (American) discovered electromagnetic induction • Michael Faraday – (English) discovered electromagnetic induction • James Maxwell – (Scottish) formulated the electromagnetic theory combining electricity, magnetism and light together

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