Magnetism & Electricity (2 magnets - Field)

AI Thread Summary
To calculate the output voltage for a coil in an axial generator with two opposing magnets, the effective magnetic field (Br) used in Faraday's Law depends on the specific geometry of the setup and the desired accuracy. The maximum magnetic field strength of the magnets is 13200 Gauss, but the actual effective Br will vary based on the arrangement and angles of the magnets. A pole model can be utilized to predict the magnetic field through the coil at different positions. Understanding these factors is crucial for accurate voltage output calculations. Accurate modeling is essential to achieve the desired electrical output.
declanka
Messages
3
Reaction score
0
I am trying to calculate the output voltage for 1 coil in an axial generator/altenator

I have 2 magnets with Br Max 13200 Gauss on opposing sides of the rotor (N-S facing), The coil is between them on stator. Using faradays equations what is the effective Br (Gauss/Tesla) that should be used.

Thanks
 
Physics news on Phys.org
Using faradays equations what is the effective Br (Gauss/Tesla) that should be used.
... should be used to achieve what aim?

Oh you mean, what approximate value should you use for B in Faraday's Law?
That will depend on the exact geometry of your setup - which determines the field characteristics - and the tolerances you want to work with (which determines how much hand-waving you get to use.)

You could, I guess, use a pole model for the magnets to predict the actual field through the loop at each angle?
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
Back
Top