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Vintage threads from the first ten years
Re: What effects inductance
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 9/12/2002 6:53 PM |
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| R.G. | Re: What effects inductance
Coil geometry, permeability of the materials in the flux path (i.e. ferromagnetic, diamagnetic or other) and number of turns *squared* determine inductance. Inductance is proportional to turns squared.
Now *that* is complicated. The relation to output is simple to a first approximation. The output of a given coil geometry and turns is proportional to the number of turns, not to the inductance. Basic electromagnetics, voltage from a coil is proportional to the change in flux cutting the coil and the number of turns. The string movements change the reluctance of the flux path of the magnet flux; the magnet's remanent field is constant, the change in reluctance lets the actual flux change with reluctance, you get flux change and the voltage on the coil changes. At the second order is where it gets complicated. The inductance and self capacitance of the magnet/coil affect the frequency response in complicated ways. Some of the magnet's flux leaks around through parts of the coil, and is never moved by the string - chalk that one up to geometry. Plus a lot of other stuff - all I know is the EM basics. R.G. | ||
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