Posted by t.r.k. on April 20, 2014 at 19:11:36 from (71.31.64.233):
In Reply to: Amps and volts posted by Notjustair on April 20, 2014 at 18:08:30:
I think it has to do with the change from mechanically regulated generators to alternators.
The old generator/mechanical regulator setup let the regulator sense battery voltage and sort of "throttle" the charging voltage off the battery voltage. The chargning voltage was not very much higher than the battery voltage. And when the battery voltage got to a certain point, it stopped charging altogether. At this point the ammeter read zero.
So, in a real-world senario, did it charge the battery up, or is the generator just not charging any at all?
In the alternator/regulator setup the charging voltage was pre-set in the regulator, because the current generated in the alternator"s field is usually a much higher AC voltage. And the regulator will keep the system voltage at the pre-set voltage, usually around 13.5 to 14.5 volts.
So at a glance the operator will always know if his alternator/regulator is charging or not. If the voltmeter reads 12.6 or below, he has a problem. 13 to 14.5 or 15 and he is good to go.
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