InvCE:
I don't suppose there is much difference in concept, but the specification of the alternator would be a much larger AC output voltage and alternator rating.
A standard automotive alternator regulator pack uses simple analog components to solve this problem. Maybe your alternator is sufficiently different to a standard alternator that you can't just take a standard regulator off the shelf, but you can certainly make your own using the same circuit design. I don't see any reason for pursuing a more complicated microcontroller based approach.