Copper wire's effect on magnetic fields

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SUMMARY

The discussion focuses on the use of copper wire coils in managing magnetic fields, specifically through the principle of transformers. It details how a sensor coil detects changes in magnetic flux and utilizes a high gain inverting amplifier to generate a counteracting magnetic field. This process involves a closed-loop control circuit designed to maintain net flux at zero. Challenges include the mechanical design of the coils and the precise placement of the sensor coil for effective cancellation.

PREREQUISITES
  • Understanding of electromagnetic induction principles
  • Knowledge of transformer operation and design
  • Familiarity with closed-loop control systems
  • Experience with circuit design and amplifier configurations
NEXT STEPS
  • Research transformer design and applications in electrical engineering
  • Study closed-loop control systems and their implementation in electronics
  • Explore the principles of electromagnetic induction and its practical applications
  • Learn about sensor coil placement and its impact on magnetic field cancellation
USEFUL FOR

Electrical engineers, electronics hobbyists, and anyone involved in designing systems that manage magnetic fields effectively.

bdfischer
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How can a coil of wire help bring the net flux in a changing magnetic field back to zero?
 
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By flowing a current which cancels the flux. When the flux originates from another coil the whole thing is called a Transformer.
 
are electrons simply pushed through the wire by this magnetic field? i.e. each individual electron with its own dipole
 
Using negative feedback. start with a sensor coil that detect the magnetic field, then feed the signal to a high gain inverting amp. The output of the amp drive the coil to generate an equal and opposite magnetic field to cancel the original field. basically it's a closed loop control circuit.

The electronic circuit is relatively easy to design, getting the mechanical dimension of those coil to really cancel the field might be difficult and also the placement of the sensor coil.
 

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