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HSC Physics

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  1. Module 5: Advanced Mechanics
    5.1 Projectile Motion
  2. 5.2 Circular Motion
  3. 5.3 Motion in Gravitational Fields
    2 Topics
  4. Module 6: Electromagnetism
    6.1 Charged Particles, Conductors and Electric and Magnetic Fields
  5. 6.2 The Motor Effect
    1 Topic
  6. 6.3 Electromagnetic Induction
  7. 6.4 Applications of the Motor Effect
    1 Topic
  8. Module 7: The Nature of Light
    7.1 Electromagnetic Spectrum
    3 Topics
  9. 7.2 Light: Wave Model
  10. 7.3 Light: Quantum Model
    2 Topics
  11. 7.4 Light and Special Relativity
  12. Module 8: From the Universe to the Atom
    8.1 Origins of the Elements
    5 Topics
  13. 8.2 Structure of the Atom
    3 Topics
  14. 8.3 Quantum Mechanical Nature of the Atom
    2 Topics
  15. 8.4 Properties of the Nucleus
    2 Topics
  16. 8.5 Deep Inside the Atom
    4 Topics

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  • EduKits Education
  • Michael
HSC Physics 6.2 The Motor Effect Improving Transformer Efficiency
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Lesson 5, Topic 1
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Improving Transformer Efficiency

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Sources of power loss in a transformer include:

  • Magnetic flux leakage
  • Resistance in coils
  • Eddy currents in the core

The following provides causes and fixes for these.

Magnetic Flux Leakage

Not all magnetic flux links both the primary and secondary coil, reducing efficiency.

  • Use ferromagnetic core
    • Outer cores to channel the magnetic fields through the cores
  • Reduce air gaps
  • Reduce distance between coils

Resistance in Coils

  • Cooling of wires (resistance increases with heat)
    • Heatsink to increase rate of heat dissipation
    • Black case to absorb heat
    • Internal fan

Eddy Currents in the Core

  • Lamination of core
  • Layers insulated by natural oxide layers on surfaces or by varnish coatings