AC Generator AVR

hi gents,

on most different types of avrs used for controling the output of ac generator 3 phase 380v or 220v, l noticed that the manufactorer use SCR to convert the ac in to varaible dc output.

i understand this, but i got an idea to use transistor instead of thyristor, i mean to convert the ac in to the regulator to dc with bridge rectifier and then use NPN transistor to control the output from the avr using a Zener diode same as in car battery charger alternater regulator and for sure i will use reheostat, and some other compenents.

is this possible to make simple avr for ac generator? please advice.

many thanks