Originally posted by LordGothington
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Atomic 4 -- generator conversion
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@(^.^)@ Ed
1977 Pearson P-323 "Dolce Vita"
with rebuilt Atomic-4
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Rethinking
Lord, after some consideration and conversations I don't think you will achieve your charging specs with the A-4 and an "off axis" drive. The reliability due to the strength of the set up is just to suspect.
The A-4 has the power but it needs to be transferred axially and then you seriously lack RPM's to achieve an efficient alt speed. About the only reliable way I can see harnessing the power from an A-4 is mounting a planetary drive between the engine and alt. That way the loads can be absorbed by the mounting pads and not all of the stuff hooked together.
Another possibility that may just help with space considerations is a hydraulic drive. They are quite sturdy and operate quite efficiently.
Both of these types of drives could readily be mounted to either end of the engine.
Dave Neptune
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Originally posted by Dave Neptune View PostLord, after some consideration and conversations I don't think you will achieve your charging specs with the A-4 and an "off axis" drive. The reliability due to the strength of the set up is just to suspect.
Originally posted by Dave Neptune View PostThe A-4 has the power but it needs to be transferred axially and then you seriously lack RPM's to achieve an efficient alt speed.
I'm thinking I need to look at alternators designed to be used with lower RPM applications such as wind power. Something like this,
A direct drive system would be nice to minimize parasitic losses. But if I need to be able to disconnect the load, then maybe a lockup torque converter could be used?
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Originally posted by LordGothington View PostAgreed.
So, perhaps the problem is trying to use an alternator that is designed for use with an engine. What is needed is an alternator that has peak performance in the 700-2000RPM range.
I'm thinking I need to look at alternators designed to be used with lower RPM applications such as wind power. Something like this,
A direct drive system would be nice to minimize parasitic losses. But if I need to be able to disconnect the load, then maybe a lockup torque converter could be used?
That said, the best high output DC system I know of was someone using an alternator from this company - http://www.electrodynealternators.com/e-series - directly driven off their crankshaft with an extension shaft. No way would most marine engines - and especially the A4 - take the side loads these beasts would have if they were belt driven. IIRC, the boat was getting either 200 or 400 amps at 24 volts. This company has 12, 24, 32, and 48 volt versions.Joe Della Barba
Coquina
C&C 35 MK I
Maryland USA
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