 coil of wire, iron core and saturation
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IamSmooth
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Tue Oct 21 2008, 09:28PM
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Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
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If I have a coil around an iron core I can generate a voltage by moving a magnet across the core surface (changing magnetic field) like in a generator. If I increase the number of turns around the iron core by 2x will this increase the induced voltage 2x if everything else is the same? If so, at what point will increasing the number of turns cease to increase the induced voltage? Do the flux saturation equations used for transformer design apply here, too (V = 2pi*f*N*AB/sqrt(2))?
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Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
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the voltage induced across the winding is just v=number of turns * d(phi)/dt
So the only thing limiting your voltage induced is the turns in the coil no longer being in the magnetic field of the magnet. (hint, use a iron core to restrict the magnetic feild lines to within the coil and you can produce very high voltages, ie megneto coil on a lawnmower)
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