Inductive coupling & wireless power transmission

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SUMMARY

This discussion focuses on the theoretical prediction of induced current in a single loop of wire placed perpendicularly around a straight wire carrying alternating current (AC). The user seeks clarification on applying Faraday's law to this scenario, noting the confusion stemming from typical transformer examples involving two coils. The conversation emphasizes that the setup resembles a basic transformer, which is fundamental in power transmission from the grid. Online calculators are recommended for further understanding of the parameters involved.

PREREQUISITES
  • Understanding of Faraday's law of electromagnetic induction
  • Familiarity with alternating current (AC) concepts
  • Basic knowledge of transformer operation
  • Experience with online coil calculators for inductance calculations
NEXT STEPS
  • Research the mathematical formulation of Faraday's law in relation to AC
  • Explore the principles of transformer design and operation
  • Learn how to use online calculators for coil inductance and performance analysis
  • Investigate the practical applications of inductive coupling in wireless power transmission
USEFUL FOR

Electrical engineers, physics students, hobbyists interested in wireless power transmission, and anyone looking to understand inductive coupling principles.

Metis
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I'm considering a very simple method of powering a small electronic device from a typical current carrying outlet. I'm trying to make a theoretical prediction to the amount of current I could generate using magnetic induction.

Problem:
I have a straight current wire carrying an alternating current and I put a single loop of wire in around the it, in the perpendicular direction. I need to find out the amount of induced current generated in the loop.

I know I need to use Faraday's law but the AC part is confusing me. All the examples like this I can find involve two coils near each other like in a transformer. I have a straight wire with AC to induce current in a coil.

If anyone could help me out to how I would start this calculation that would be great

kind of like in the first picture here:
http://www.ndt-ed.org/EducationResources/CommunityCollege/EddyCurrents/Physics/inductance.htm
 
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You may not realize it, but you are trying to build an ordinary transformer. All the power we consume from the power grid goes through transformers. So how much power? A lot!

Online calculators can help you to understand the parameters and performance.
http://dicks-website.eu/coilcalculator/index.html
 

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