--- In [email protected], poco baya <[EMAIL PROTECTED]> wrote: > > > Can anyone tell me what the output of a small car alternator, such as a Toyota Corolla 70 amp. unit, would be at around 6000 rpm (the alternator, not the car)? >
Most alternators are rated at 6000 rpm, so it should produce the full 70 amps. You do need to subtract the excitation current from that, so I would not count on anything above 65 amps. Spinning it at that speed, the brushes are not going to last very long, 6-8 weeks would be my guess. If you cut the speed to about 3000 rpm, the alternator should still produce 50-55 amps and the brushes will last a little longer, say 12-16 weeks. If you hook the alternator to a big battery bank, your bigger loss of generation will come from the internal regulator on the alternator. As you get up somewhere near the 13 volt mark on the battery, the regulator will cut way back on the output, despite the rpm. You will never get the large bank "fully" charged. Oso ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
