You have not said if the connection is STAR or DELTA.
You need to rectify the 3 phases, also you need to tell me if you are charging a battery and at what point (voltage generated) you are loading the generator.
There are many small PWM controllers good for 115 volts AC that have an Isolated 12 volts output with amperages like 0.5 to 1.5 amps.
Some are good for 115 others are wide universal range ( 85 to 265 volts AC ) OF COURSE YOU LOOK ONE FOR "UNIVERSAL VOLTAGE RANGE"
CUT THE POWER CORD next to the plug, find the white and black wires, connect the BLACK WIRE to the POSITIVE coming from the wind mill, the WHITE WIRE to the NEGATIVE wind mill.
You have attained a power source for your controller that may start to operate around 60 Volts AC, you may add a LED to know that the power is ON, I use a LED plus a Zener and a resistor
For 12 Volts, I use a 6.8 Volts zener, a Green diode and ( 6.8 + 2 = 8.8 volts) with 20 milliamps current so the resistor is 12 - 8.8 = 3.2 volts/20*10^3 = 160 ohms - USE 150 OHMS -- 1/4 WATT OK.
Use a Zener to insure that the supply is above 9 volts up.
There you have a good supply feeding your controller -- surplus around 8 to 10 dollars, I think
let me know how it worked for you, my address in in the message heading
Regards
Nando