- Jan 1, 1970
Randy said:Greetings Group,
This is a hypothetical question concerning an automotive charging
system. I know that the voltage regulator controls battery charging by
regulating the field current in the alternator between 13.5 and 14.5
volts. The question I pose is this:
If the voltage from the alternator (unregulated) was held at a constant
11 volts , that's 11vdc to a peak of 15.55vdc, full ripple, no filter,
would this damage the lead-acid battery?
I don't understand your Dc versus peak voltage numbers. Automotive
alternators are 3 phase generators with full wave rectifiers. The
ripple voltage is very much lower than what you specify (about 5%, I
Theoretically, in this model, the battery works in conjunction with
alternator to supply the load instead of intermittent use. When the
alternator voltage drops below 13.5, the battery starts conducting its
supply to the load. When the alternator voltage exceeds battery voltage,
the battery is charged.
This part makes sense.