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Input/Output voltage relationship for alternator

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Nov5-06, 02:07 PM
P: 238
Hello again,

I'm here with a request for some advice. Hopefully I won't need as much this time as it's something I'm a bit more clued up on

I'm trying to work out what output voltage will occur on the stator coils of my alternator in relation to the excitation voltage in the rotor coils.

I can obtain data such as windings per pole, resistance of coil, rpm and others because I have direct access to it.

Before I go steaming off down what would surely turn-out to be the long way round does anyone have an idea for a good acceptably accurate solution?

I was thinking of working out the strength of the magnetic field in the rotor for given excitation voltages and working out how many times it passed through the poles on the stator for various rpm's. Would this be a good way to start?

Bear in mind I'm only looking for a reasonably accurate approximation, not something ultra accurate
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Nov5-06, 08:06 PM
Sci Advisor
HW Helper
P: 1,571
Back EMF seems like it would be a consideration.
Certainly a factor in motors.
Don't know how it applies to generators.
Nov6-06, 10:20 AM
P: 238
I suppose given that both rotor and stator coils are basically large inductors this would indeed be an issue. Thanks for pointing it out

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