Quote:
Originally Posted by Clavurion
Doesn't it cause phase shift and lag on the alternator or is the optimal phase shift so close to 180 degrees that the change is negligible?
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Alternator has no idea. The phase of the 3 AC phases is shifted but the start point is completly arbitrary and as 80s mentioned the ≈ 400hz three phase AC is rectified to DC.
I wondered for decades how on earth does the car regulate the output and can usually maintain 13.8 ± 0.2v regardless of the RPM or load.
It's actually so simple: there's a direct feedback loop that increases the field winding current if voltage is less than the set/design voltage.
Higher field current, stronger magnetic field, higher 3-phase AC voltage that's rectified.
It's fully automatic and virtually instantaneous.
–awr–
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