Re: Generator Pegs Ammeter!! - typo correction!

Posted by Bob M on January 05, 2007 at 11:25:35 from (151.190.254.108):

In Reply to: Re: Generator Pegs Ammeter!! - typo correction! posted by chadd on January 05, 2007 at 10:16:46:

Chadd - a couple more comments/observations:

1 - If the existing ammeter terminals are so corroded they risk breaking off it's probably time for a new ammeter! ($20 or so...)

2 - Regarding the 30 amp discharge changing to a 30 amp charge if you flip the battery, keep this in mind:

Operating with the polarity reversed causes the generator's output voltage to ADD to the battery's voltage when forcing a discharge current. This high level of discharge is indicated by the ammeter pegging at -30 amps.

However with the polarity correct the generator voltage opposes battery voltage. Now when generator voltage slightly exceeds battery voltage, the generator forces current back the opposite direction and charging takes place. Thus 10 - 15 amps of charge will be the maximum and which the ammeter will indicate.

I don't see how messing up the rebuild can cause polarization problems. Only way I can figure to do it is to refit the generator with permanent magnet field shoes (pretty much impossible!)

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I guess if it were me I'd swap in a new ammeter, change the system polarity to negative ground then be done with it!

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