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Re: Spiral Architect/ alternator inputs -at- 480 hz.
Original poster: "Paul Nicholson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <paul-at-abelian.demon.co.uk>
Harvey,
If I follow your post correctly, you've got 2.28mH
resonating with 48uF, you're driving the two in series
with an alternator at 480Hz, and you're getting a poor
resonance?
Have you taken into account the internal resistance of
the alternator? The Q is 6.283 * 480 * L / R, which
comes out at around Q=7 if you take as R the 1 ohm
resistance of the coil. But really you have to add the
alternator's internal resistance to get the total R,
and if thats just a few ohms it will completely
dampen your resonance. Have you measured the output
impedance of your alternator at 480Hz, and are you
including that in the total circuit resistance when
you predict the performance?
Cheers,
--
Paul Nicholson
Manchester, UK
--