Calculating Magnetic Field of a Bar magnet

  • Thread starter Xyius
  • Start date
  • #1
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Main Question or Discussion Point

I am trying to calculate the theoretical induced emf of a hand crank generator I am going to make. The generator will have a rotating magnet inside a coil of wire. The magnet will be fairly strong.

Magnetic Pull Force: 146 lbs
Magnet Dimentions: 2"x1"x1" rectangular block

Is is possible to calculate the magnetic field from this data? I have already calculated that the induced emf in the coil will be..

ε = NBω(2πRH)sin(ωt)
N=Number of turns in the coil of wire
B=Magnetic Field
ω=Angular speed
R=Radius
H=height
t=time

The only thing I don't have to calculate the induced emf is the magnetic field. I don't know much about calculating this type of thing, I know it can be tricky. Thanks!

EDIT:
The poles of the bar magnet are on the 2" x 1" faces
 

Answers and Replies

  • #2
508
4
Can anyone help me out? No one?
 

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