1 / 8

Understanding Electrical Generators, Transformers, and Moving Conductors

Delve into the principles of moving conductors, generators, transformers, and electrical transmission. Learn how induced currents and EMF work, the mechanics of generators converting mechanical to electrical energy, efficiency of transformers, and the significance of voltage variations. Explore the efficient transportation of electric energy.

hsaldivar
Download Presentation

Understanding Electrical Generators, Transformers, and Moving Conductors

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Generator and Transformer

  2. Moving Conductor • If a straight conductor is moved in a path perpendicular to a magnetic field, a current is induced in the conductor • Induced emf  = B l v l – length of conductor v – velocity of conductor

  3. Example • An airplane travels at 1000 km/hr in region where the Earth’s magnetic field in 5.0 x 10-5 T. What is the emf induced between the wing tips that are 70m apart?

  4. Generators (Dynamo) • Transforms mechanical energy into electric energy • Coil of wire spins in the presence of a permanent magnetic field • Induces are current in the coil • Current produced actually fluctuates as the coils position in the field changes • Max current when perpendicular to B • Min current when coil parallel to B (no current)

  5. Moving Electricity • How does electric energy transmit over large distances? • How much power is wasted when 10000W of power is transmitted along a cable with a resistance of 1 at 200V? • What would be lost if transmitted at 2000V instead? • Much less lost when travels at a higher V and lower I

  6. Transformer • Device that changes voltages • Two coils around an iron core • Current supplied to the primary coil induces a current in the secondary coil • By varying the number of windings in the coils you can vary the potentials

  7. Types • Step-up – more windings on the secondary coil increases the voltage • Step-down – less windings on the secondary coil decreases the voltage • Transformers work only on AC current. Why?

  8. Transportation • Electric energy is stepped up for transmission and then stepped down for household use • Most transformers are close to ideal (100% efficient) - low resistance - very permeable rounded core

More Related